1 /* Ada language support routines for GDB, the GNU debugger. Copyright (C)
3 1992, 1993, 1994, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2007
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "gdb_string.h"
28 #include "gdb_regex.h"
33 #include "expression.h"
34 #include "parser-defs.h"
40 #include "breakpoint.h"
43 #include "gdb_obstack.h"
45 #include "completer.h"
52 #include "dictionary.h"
53 #include "exceptions.h"
60 #ifndef ADA_RETAIN_DOTS
61 #define ADA_RETAIN_DOTS 0
64 /* Define whether or not the C operator '/' truncates towards zero for
65 differently signed operands (truncation direction is undefined in C).
66 Copied from valarith.c. */
68 #ifndef TRUNCATION_TOWARDS_ZERO
69 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
72 static void extract_string (CORE_ADDR addr, char *buf);
74 static void modify_general_field (char *, LONGEST, int, int);
76 static struct type *desc_base_type (struct type *);
78 static struct type *desc_bounds_type (struct type *);
80 static struct value *desc_bounds (struct value *);
82 static int fat_pntr_bounds_bitpos (struct type *);
84 static int fat_pntr_bounds_bitsize (struct type *);
86 static struct type *desc_data_type (struct type *);
88 static struct value *desc_data (struct value *);
90 static int fat_pntr_data_bitpos (struct type *);
92 static int fat_pntr_data_bitsize (struct type *);
94 static struct value *desc_one_bound (struct value *, int, int);
96 static int desc_bound_bitpos (struct type *, int, int);
98 static int desc_bound_bitsize (struct type *, int, int);
100 static struct type *desc_index_type (struct type *, int);
102 static int desc_arity (struct type *);
104 static int ada_type_match (struct type *, struct type *, int);
106 static int ada_args_match (struct symbol *, struct value **, int);
108 static struct value *ensure_lval (struct value *, CORE_ADDR *);
110 static struct value *convert_actual (struct value *, struct type *,
113 static struct value *make_array_descriptor (struct type *, struct value *,
116 static void ada_add_block_symbols (struct obstack *,
117 struct block *, const char *,
118 domain_enum, struct objfile *, int);
120 static int is_nonfunction (struct ada_symbol_info *, int);
122 static void add_defn_to_vec (struct obstack *, struct symbol *,
125 static int num_defns_collected (struct obstack *);
127 static struct ada_symbol_info *defns_collected (struct obstack *, int);
129 static struct partial_symbol *ada_lookup_partial_symbol (struct partial_symtab
130 *, const char *, int,
133 static struct symtab *symtab_for_sym (struct symbol *);
135 static struct value *resolve_subexp (struct expression **, int *, int,
138 static void replace_operator_with_call (struct expression **, int, int, int,
139 struct symbol *, struct block *);
141 static int possible_user_operator_p (enum exp_opcode, struct value **);
143 static char *ada_op_name (enum exp_opcode);
145 static const char *ada_decoded_op_name (enum exp_opcode);
147 static int numeric_type_p (struct type *);
149 static int integer_type_p (struct type *);
151 static int scalar_type_p (struct type *);
153 static int discrete_type_p (struct type *);
155 static enum ada_renaming_category parse_old_style_renaming (struct type *,
160 static struct symbol *find_old_style_renaming_symbol (const char *,
163 static struct type *ada_lookup_struct_elt_type (struct type *, char *,
166 static struct value *evaluate_subexp (struct type *, struct expression *,
169 static struct value *evaluate_subexp_type (struct expression *, int *);
171 static int is_dynamic_field (struct type *, int);
173 static struct type *to_fixed_variant_branch_type (struct type *,
175 CORE_ADDR, struct value *);
177 static struct type *to_fixed_array_type (struct type *, struct value *, int);
179 static struct type *to_fixed_range_type (char *, struct value *,
182 static struct type *to_static_fixed_type (struct type *);
183 static struct type *static_unwrap_type (struct type *type);
185 static struct value *unwrap_value (struct value *);
187 static struct type *packed_array_type (struct type *, long *);
189 static struct type *decode_packed_array_type (struct type *);
191 static struct value *decode_packed_array (struct value *);
193 static struct value *value_subscript_packed (struct value *, int,
196 static void move_bits (gdb_byte *, int, const gdb_byte *, int, int);
198 static struct value *coerce_unspec_val_to_type (struct value *,
201 static struct value *get_var_value (char *, char *);
203 static int lesseq_defined_than (struct symbol *, struct symbol *);
205 static int equiv_types (struct type *, struct type *);
207 static int is_name_suffix (const char *);
209 static int wild_match (const char *, int, const char *);
211 static struct value *ada_coerce_ref (struct value *);
213 static LONGEST pos_atr (struct value *);
215 static struct value *value_pos_atr (struct value *);
217 static struct value *value_val_atr (struct type *, struct value *);
219 static struct symbol *standard_lookup (const char *, const struct block *,
222 static struct value *ada_search_struct_field (char *, struct value *, int,
225 static struct value *ada_value_primitive_field (struct value *, int, int,
228 static int find_struct_field (char *, struct type *, int,
229 struct type **, int *, int *, int *, int *);
231 static struct value *ada_to_fixed_value_create (struct type *, CORE_ADDR,
234 static struct value *ada_to_fixed_value (struct value *);
236 static int ada_resolve_function (struct ada_symbol_info *, int,
237 struct value **, int, const char *,
240 static struct value *ada_coerce_to_simple_array (struct value *);
242 static int ada_is_direct_array_type (struct type *);
244 static void ada_language_arch_info (struct gdbarch *,
245 struct language_arch_info *);
247 static void check_size (const struct type *);
249 static struct value *ada_index_struct_field (int, struct value *, int,
252 static struct value *assign_aggregate (struct value *, struct value *,
253 struct expression *, int *, enum noside);
255 static void aggregate_assign_from_choices (struct value *, struct value *,
257 int *, LONGEST *, int *,
258 int, LONGEST, LONGEST);
260 static void aggregate_assign_positional (struct value *, struct value *,
262 int *, LONGEST *, int *, int,
266 static void aggregate_assign_others (struct value *, struct value *,
268 int *, LONGEST *, int, LONGEST, LONGEST);
271 static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int);
274 static struct value *ada_evaluate_subexp (struct type *, struct expression *,
277 static void ada_forward_operator_length (struct expression *, int, int *,
282 /* Maximum-sized dynamic type. */
283 static unsigned int varsize_limit;
285 /* FIXME: brobecker/2003-09-17: No longer a const because it is
286 returned by a function that does not return a const char *. */
287 static char *ada_completer_word_break_characters =
289 " \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
291 " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
294 /* The name of the symbol to use to get the name of the main subprogram. */
295 static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[]
296 = "__gnat_ada_main_program_name";
298 /* Limit on the number of warnings to raise per expression evaluation. */
299 static int warning_limit = 2;
301 /* Number of warning messages issued; reset to 0 by cleanups after
302 expression evaluation. */
303 static int warnings_issued = 0;
305 static const char *known_runtime_file_name_patterns[] = {
306 ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
309 static const char *known_auxiliary_function_name_patterns[] = {
310 ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
313 /* Space for allocating results of ada_lookup_symbol_list. */
314 static struct obstack symbol_list_obstack;
318 /* Given DECODED_NAME a string holding a symbol name in its
319 decoded form (ie using the Ada dotted notation), returns
320 its unqualified name. */
323 ada_unqualified_name (const char *decoded_name)
325 const char *result = strrchr (decoded_name, '.');
328 result++; /* Skip the dot... */
330 result = decoded_name;
335 /* Return a string starting with '<', followed by STR, and '>'.
336 The result is good until the next call. */
339 add_angle_brackets (const char *str)
341 static char *result = NULL;
344 result = (char *) xmalloc ((strlen (str) + 3) * sizeof (char));
346 sprintf (result, "<%s>", str);
351 ada_get_gdb_completer_word_break_characters (void)
353 return ada_completer_word_break_characters;
356 /* Print an array element index using the Ada syntax. */
359 ada_print_array_index (struct value *index_value, struct ui_file *stream,
360 int format, enum val_prettyprint pretty)
362 LA_VALUE_PRINT (index_value, stream, format, pretty);
363 fprintf_filtered (stream, " => ");
366 /* Read the string located at ADDR from the inferior and store the
370 extract_string (CORE_ADDR addr, char *buf)
374 /* Loop, reading one byte at a time, until we reach the '\000'
375 end-of-string marker. */
378 target_read_memory (addr + char_index * sizeof (char),
379 buf + char_index * sizeof (char), sizeof (char));
382 while (buf[char_index - 1] != '\000');
385 /* Assuming VECT points to an array of *SIZE objects of size
386 ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
387 updating *SIZE as necessary and returning the (new) array. */
390 grow_vect (void *vect, size_t *size, size_t min_size, int element_size)
392 if (*size < min_size)
395 if (*size < min_size)
397 vect = xrealloc (vect, *size * element_size);
402 /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
403 suffix of FIELD_NAME beginning "___". */
406 field_name_match (const char *field_name, const char *target)
408 int len = strlen (target);
410 (strncmp (field_name, target, len) == 0
411 && (field_name[len] == '\0'
412 || (strncmp (field_name + len, "___", 3) == 0
413 && strcmp (field_name + strlen (field_name) - 6,
418 /* Assuming TYPE is a TYPE_CODE_STRUCT, find the field whose name matches
419 FIELD_NAME, and return its index. This function also handles fields
420 whose name have ___ suffixes because the compiler sometimes alters
421 their name by adding such a suffix to represent fields with certain
422 constraints. If the field could not be found, return a negative
423 number if MAYBE_MISSING is set. Otherwise raise an error. */
426 ada_get_field_index (const struct type *type, const char *field_name,
430 for (fieldno = 0; fieldno < TYPE_NFIELDS (type); fieldno++)
431 if (field_name_match (TYPE_FIELD_NAME (type, fieldno), field_name))
435 error (_("Unable to find field %s in struct %s. Aborting"),
436 field_name, TYPE_NAME (type));
441 /* The length of the prefix of NAME prior to any "___" suffix. */
444 ada_name_prefix_len (const char *name)
450 const char *p = strstr (name, "___");
452 return strlen (name);
458 /* Return non-zero if SUFFIX is a suffix of STR.
459 Return zero if STR is null. */
462 is_suffix (const char *str, const char *suffix)
468 len2 = strlen (suffix);
469 return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0);
472 /* Create a value of type TYPE whose contents come from VALADDR, if it
473 is non-null, and whose memory address (in the inferior) is
477 value_from_contents_and_address (struct type *type,
478 const gdb_byte *valaddr,
481 struct value *v = allocate_value (type);
483 set_value_lazy (v, 1);
485 memcpy (value_contents_raw (v), valaddr, TYPE_LENGTH (type));
486 VALUE_ADDRESS (v) = address;
488 VALUE_LVAL (v) = lval_memory;
492 /* The contents of value VAL, treated as a value of type TYPE. The
493 result is an lval in memory if VAL is. */
495 static struct value *
496 coerce_unspec_val_to_type (struct value *val, struct type *type)
498 type = ada_check_typedef (type);
499 if (value_type (val) == type)
503 struct value *result;
505 /* Make sure that the object size is not unreasonable before
506 trying to allocate some memory for it. */
509 result = allocate_value (type);
510 VALUE_LVAL (result) = VALUE_LVAL (val);
511 set_value_bitsize (result, value_bitsize (val));
512 set_value_bitpos (result, value_bitpos (val));
513 VALUE_ADDRESS (result) = VALUE_ADDRESS (val) + value_offset (val);
515 || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
516 set_value_lazy (result, 1);
518 memcpy (value_contents_raw (result), value_contents (val),
524 static const gdb_byte *
525 cond_offset_host (const gdb_byte *valaddr, long offset)
530 return valaddr + offset;
534 cond_offset_target (CORE_ADDR address, long offset)
539 return address + offset;
542 /* Issue a warning (as for the definition of warning in utils.c, but
543 with exactly one argument rather than ...), unless the limit on the
544 number of warnings has passed during the evaluation of the current
547 /* FIXME: cagney/2004-10-10: This function is mimicking the behavior
548 provided by "complaint". */
549 static void lim_warning (const char *format, ...) ATTR_FORMAT (printf, 1, 2);
552 lim_warning (const char *format, ...)
555 va_start (args, format);
557 warnings_issued += 1;
558 if (warnings_issued <= warning_limit)
559 vwarning (format, args);
564 /* Issue an error if the size of an object of type T is unreasonable,
565 i.e. if it would be a bad idea to allocate a value of this type in
569 check_size (const struct type *type)
571 if (TYPE_LENGTH (type) > varsize_limit)
572 error (_("object size is larger than varsize-limit"));
576 /* Note: would have used MAX_OF_TYPE and MIN_OF_TYPE macros from
577 gdbtypes.h, but some of the necessary definitions in that file
578 seem to have gone missing. */
580 /* Maximum value of a SIZE-byte signed integer type. */
582 max_of_size (int size)
584 LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2);
585 return top_bit | (top_bit - 1);
588 /* Minimum value of a SIZE-byte signed integer type. */
590 min_of_size (int size)
592 return -max_of_size (size) - 1;
595 /* Maximum value of a SIZE-byte unsigned integer type. */
597 umax_of_size (int size)
599 ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1);
600 return top_bit | (top_bit - 1);
603 /* Maximum value of integral type T, as a signed quantity. */
605 max_of_type (struct type *t)
607 if (TYPE_UNSIGNED (t))
608 return (LONGEST) umax_of_size (TYPE_LENGTH (t));
610 return max_of_size (TYPE_LENGTH (t));
613 /* Minimum value of integral type T, as a signed quantity. */
615 min_of_type (struct type *t)
617 if (TYPE_UNSIGNED (t))
620 return min_of_size (TYPE_LENGTH (t));
623 /* The largest value in the domain of TYPE, a discrete type, as an integer. */
625 discrete_type_high_bound (struct type *type)
627 switch (TYPE_CODE (type))
629 case TYPE_CODE_RANGE:
630 return TYPE_HIGH_BOUND (type);
632 return TYPE_FIELD_BITPOS (type, TYPE_NFIELDS (type) - 1);
637 return max_of_type (type);
639 error (_("Unexpected type in discrete_type_high_bound."));
643 /* The largest value in the domain of TYPE, a discrete type, as an integer. */
645 discrete_type_low_bound (struct type *type)
647 switch (TYPE_CODE (type))
649 case TYPE_CODE_RANGE:
650 return TYPE_LOW_BOUND (type);
652 return TYPE_FIELD_BITPOS (type, 0);
657 return min_of_type (type);
659 error (_("Unexpected type in discrete_type_low_bound."));
663 /* The identity on non-range types. For range types, the underlying
664 non-range scalar type. */
667 base_type (struct type *type)
669 while (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE)
671 if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL)
673 type = TYPE_TARGET_TYPE (type);
679 /* Language Selection */
681 /* If the main program is in Ada, return language_ada, otherwise return LANG
682 (the main program is in Ada iif the adainit symbol is found).
684 MAIN_PST is not used. */
687 ada_update_initial_language (enum language lang,
688 struct partial_symtab *main_pst)
690 if (lookup_minimal_symbol ("adainit", (const char *) NULL,
691 (struct objfile *) NULL) != NULL)
697 /* If the main procedure is written in Ada, then return its name.
698 The result is good until the next call. Return NULL if the main
699 procedure doesn't appear to be in Ada. */
704 struct minimal_symbol *msym;
705 CORE_ADDR main_program_name_addr;
706 static char main_program_name[1024];
708 /* For Ada, the name of the main procedure is stored in a specific
709 string constant, generated by the binder. Look for that symbol,
710 extract its address, and then read that string. If we didn't find
711 that string, then most probably the main procedure is not written
713 msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL);
717 main_program_name_addr = SYMBOL_VALUE_ADDRESS (msym);
718 if (main_program_name_addr == 0)
719 error (_("Invalid address for Ada main program name."));
721 extract_string (main_program_name_addr, main_program_name);
722 return main_program_name;
725 /* The main procedure doesn't seem to be in Ada. */
731 /* Table of Ada operators and their GNAT-encoded names. Last entry is pair
734 const struct ada_opname_map ada_opname_table[] = {
735 {"Oadd", "\"+\"", BINOP_ADD},
736 {"Osubtract", "\"-\"", BINOP_SUB},
737 {"Omultiply", "\"*\"", BINOP_MUL},
738 {"Odivide", "\"/\"", BINOP_DIV},
739 {"Omod", "\"mod\"", BINOP_MOD},
740 {"Orem", "\"rem\"", BINOP_REM},
741 {"Oexpon", "\"**\"", BINOP_EXP},
742 {"Olt", "\"<\"", BINOP_LESS},
743 {"Ole", "\"<=\"", BINOP_LEQ},
744 {"Ogt", "\">\"", BINOP_GTR},
745 {"Oge", "\">=\"", BINOP_GEQ},
746 {"Oeq", "\"=\"", BINOP_EQUAL},
747 {"One", "\"/=\"", BINOP_NOTEQUAL},
748 {"Oand", "\"and\"", BINOP_BITWISE_AND},
749 {"Oor", "\"or\"", BINOP_BITWISE_IOR},
750 {"Oxor", "\"xor\"", BINOP_BITWISE_XOR},
751 {"Oconcat", "\"&\"", BINOP_CONCAT},
752 {"Oabs", "\"abs\"", UNOP_ABS},
753 {"Onot", "\"not\"", UNOP_LOGICAL_NOT},
754 {"Oadd", "\"+\"", UNOP_PLUS},
755 {"Osubtract", "\"-\"", UNOP_NEG},
759 /* Return non-zero if STR should be suppressed in info listings. */
762 is_suppressed_name (const char *str)
764 if (strncmp (str, "_ada_", 5) == 0)
766 if (str[0] == '_' || str[0] == '\000')
771 const char *suffix = strstr (str, "___");
772 if (suffix != NULL && suffix[3] != 'X')
775 suffix = str + strlen (str);
776 for (p = suffix - 1; p != str; p -= 1)
780 if (p[0] == 'X' && p[-1] != '_')
784 for (i = 0; ada_opname_table[i].encoded != NULL; i += 1)
785 if (strncmp (ada_opname_table[i].encoded, p,
786 strlen (ada_opname_table[i].encoded)) == 0)
795 /* The "encoded" form of DECODED, according to GNAT conventions.
796 The result is valid until the next call to ada_encode. */
799 ada_encode (const char *decoded)
801 static char *encoding_buffer = NULL;
802 static size_t encoding_buffer_size = 0;
809 GROW_VECT (encoding_buffer, encoding_buffer_size,
810 2 * strlen (decoded) + 10);
813 for (p = decoded; *p != '\0'; p += 1)
815 if (!ADA_RETAIN_DOTS && *p == '.')
817 encoding_buffer[k] = encoding_buffer[k + 1] = '_';
822 const struct ada_opname_map *mapping;
824 for (mapping = ada_opname_table;
825 mapping->encoded != NULL
826 && strncmp (mapping->decoded, p,
827 strlen (mapping->decoded)) != 0; mapping += 1)
829 if (mapping->encoded == NULL)
830 error (_("invalid Ada operator name: %s"), p);
831 strcpy (encoding_buffer + k, mapping->encoded);
832 k += strlen (mapping->encoded);
837 encoding_buffer[k] = *p;
842 encoding_buffer[k] = '\0';
843 return encoding_buffer;
846 /* Return NAME folded to lower case, or, if surrounded by single
847 quotes, unfolded, but with the quotes stripped away. Result good
851 ada_fold_name (const char *name)
853 static char *fold_buffer = NULL;
854 static size_t fold_buffer_size = 0;
856 int len = strlen (name);
857 GROW_VECT (fold_buffer, fold_buffer_size, len + 1);
861 strncpy (fold_buffer, name + 1, len - 2);
862 fold_buffer[len - 2] = '\000';
867 for (i = 0; i <= len; i += 1)
868 fold_buffer[i] = tolower (name[i]);
874 /* Return nonzero if C is either a digit or a lowercase alphabet character. */
877 is_lower_alphanum (const char c)
879 return (isdigit (c) || (isalpha (c) && islower (c)));
882 /* Remove either of these suffixes:
887 These are suffixes introduced by the compiler for entities such as
888 nested subprogram for instance, in order to avoid name clashes.
889 They do not serve any purpose for the debugger. */
892 ada_remove_trailing_digits (const char *encoded, int *len)
894 if (*len > 1 && isdigit (encoded[*len - 1]))
897 while (i > 0 && isdigit (encoded[i]))
899 if (i >= 0 && encoded[i] == '.')
901 else if (i >= 0 && encoded[i] == '$')
903 else if (i >= 2 && strncmp (encoded + i - 2, "___", 3) == 0)
905 else if (i >= 1 && strncmp (encoded + i - 1, "__", 2) == 0)
910 /* Remove the suffix introduced by the compiler for protected object
914 ada_remove_po_subprogram_suffix (const char *encoded, int *len)
916 /* Remove trailing N. */
918 /* Protected entry subprograms are broken into two
919 separate subprograms: The first one is unprotected, and has
920 a 'N' suffix; the second is the protected version, and has
921 the 'P' suffix. The second calls the first one after handling
922 the protection. Since the P subprograms are internally generated,
923 we leave these names undecoded, giving the user a clue that this
924 entity is internal. */
927 && encoded[*len - 1] == 'N'
928 && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2])))
932 /* If ENCODED follows the GNAT entity encoding conventions, then return
933 the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is
936 The resulting string is valid until the next call of ada_decode.
937 If the string is unchanged by decoding, the original string pointer
941 ada_decode (const char *encoded)
948 static char *decoding_buffer = NULL;
949 static size_t decoding_buffer_size = 0;
951 /* The name of the Ada main procedure starts with "_ada_".
952 This prefix is not part of the decoded name, so skip this part
953 if we see this prefix. */
954 if (strncmp (encoded, "_ada_", 5) == 0)
957 /* If the name starts with '_', then it is not a properly encoded
958 name, so do not attempt to decode it. Similarly, if the name
959 starts with '<', the name should not be decoded. */
960 if (encoded[0] == '_' || encoded[0] == '<')
963 len0 = strlen (encoded);
965 ada_remove_trailing_digits (encoded, &len0);
966 ada_remove_po_subprogram_suffix (encoded, &len0);
968 /* Remove the ___X.* suffix if present. Do not forget to verify that
969 the suffix is located before the current "end" of ENCODED. We want
970 to avoid re-matching parts of ENCODED that have previously been
971 marked as discarded (by decrementing LEN0). */
972 p = strstr (encoded, "___");
973 if (p != NULL && p - encoded < len0 - 3)
981 /* Remove any trailing TKB suffix. It tells us that this symbol
982 is for the body of a task, but that information does not actually
983 appear in the decoded name. */
985 if (len0 > 3 && strncmp (encoded + len0 - 3, "TKB", 3) == 0)
988 /* Remove trailing "B" suffixes. */
989 /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */
991 if (len0 > 1 && strncmp (encoded + len0 - 1, "B", 1) == 0)
994 /* Make decoded big enough for possible expansion by operator name. */
996 GROW_VECT (decoding_buffer, decoding_buffer_size, 2 * len0 + 1);
997 decoded = decoding_buffer;
999 /* Remove trailing __{digit}+ or trailing ${digit}+. */
1001 if (len0 > 1 && isdigit (encoded[len0 - 1]))
1004 while ((i >= 0 && isdigit (encoded[i]))
1005 || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1])))
1007 if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_')
1009 else if (encoded[i] == '$')
1013 /* The first few characters that are not alphabetic are not part
1014 of any encoding we use, so we can copy them over verbatim. */
1016 for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1)
1017 decoded[j] = encoded[i];
1022 /* Is this a symbol function? */
1023 if (at_start_name && encoded[i] == 'O')
1026 for (k = 0; ada_opname_table[k].encoded != NULL; k += 1)
1028 int op_len = strlen (ada_opname_table[k].encoded);
1029 if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1,
1031 && !isalnum (encoded[i + op_len]))
1033 strcpy (decoded + j, ada_opname_table[k].decoded);
1036 j += strlen (ada_opname_table[k].decoded);
1040 if (ada_opname_table[k].encoded != NULL)
1045 /* Replace "TK__" with "__", which will eventually be translated
1046 into "." (just below). */
1048 if (i < len0 - 4 && strncmp (encoded + i, "TK__", 4) == 0)
1051 /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually
1052 be translated into "." (just below). These are internal names
1053 generated for anonymous blocks inside which our symbol is nested. */
1055 if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_'
1056 && encoded [i+2] == 'B' && encoded [i+3] == '_'
1057 && isdigit (encoded [i+4]))
1061 while (k < len0 && isdigit (encoded[k]))
1062 k++; /* Skip any extra digit. */
1064 /* Double-check that the "__B_{DIGITS}+" sequence we found
1065 is indeed followed by "__". */
1066 if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_')
1070 /* Remove _E{DIGITS}+[sb] */
1072 /* Just as for protected object subprograms, there are 2 categories
1073 of subprograms created by the compiler for each entry. The first
1074 one implements the actual entry code, and has a suffix following
1075 the convention above; the second one implements the barrier and
1076 uses the same convention as above, except that the 'E' is replaced
1079 Just as above, we do not decode the name of barrier functions
1080 to give the user a clue that the code he is debugging has been
1081 internally generated. */
1083 if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E'
1084 && isdigit (encoded[i+2]))
1088 while (k < len0 && isdigit (encoded[k]))
1092 && (encoded[k] == 'b' || encoded[k] == 's'))
1095 /* Just as an extra precaution, make sure that if this
1096 suffix is followed by anything else, it is a '_'.
1097 Otherwise, we matched this sequence by accident. */
1099 || (k < len0 && encoded[k] == '_'))
1104 /* Remove trailing "N" in [a-z0-9]+N__. The N is added by
1105 the GNAT front-end in protected object subprograms. */
1108 && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_')
1110 /* Backtrack a bit up until we reach either the begining of
1111 the encoded name, or "__". Make sure that we only find
1112 digits or lowercase characters. */
1113 const char *ptr = encoded + i - 1;
1115 while (ptr >= encoded && is_lower_alphanum (ptr[0]))
1118 || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_'))
1122 if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1]))
1124 /* This is a X[bn]* sequence not separated from the previous
1125 part of the name with a non-alpha-numeric character (in other
1126 words, immediately following an alpha-numeric character), then
1127 verify that it is placed at the end of the encoded name. If
1128 not, then the encoding is not valid and we should abort the
1129 decoding. Otherwise, just skip it, it is used in body-nested
1133 while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n'));
1137 else if (!ADA_RETAIN_DOTS
1138 && i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_')
1140 /* Replace '__' by '.'. */
1148 /* It's a character part of the decoded name, so just copy it
1150 decoded[j] = encoded[i];
1155 decoded[j] = '\000';
1157 /* Decoded names should never contain any uppercase character.
1158 Double-check this, and abort the decoding if we find one. */
1160 for (i = 0; decoded[i] != '\0'; i += 1)
1161 if (isupper (decoded[i]) || decoded[i] == ' ')
1164 if (strcmp (decoded, encoded) == 0)
1170 GROW_VECT (decoding_buffer, decoding_buffer_size, strlen (encoded) + 3);
1171 decoded = decoding_buffer;
1172 if (encoded[0] == '<')
1173 strcpy (decoded, encoded);
1175 sprintf (decoded, "<%s>", encoded);
1180 /* Table for keeping permanent unique copies of decoded names. Once
1181 allocated, names in this table are never released. While this is a
1182 storage leak, it should not be significant unless there are massive
1183 changes in the set of decoded names in successive versions of a
1184 symbol table loaded during a single session. */
1185 static struct htab *decoded_names_store;
1187 /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it
1188 in the language-specific part of GSYMBOL, if it has not been
1189 previously computed. Tries to save the decoded name in the same
1190 obstack as GSYMBOL, if possible, and otherwise on the heap (so that,
1191 in any case, the decoded symbol has a lifetime at least that of
1193 The GSYMBOL parameter is "mutable" in the C++ sense: logically
1194 const, but nevertheless modified to a semantically equivalent form
1195 when a decoded name is cached in it.
1199 ada_decode_symbol (const struct general_symbol_info *gsymbol)
1202 (char **) &gsymbol->language_specific.cplus_specific.demangled_name;
1203 if (*resultp == NULL)
1205 const char *decoded = ada_decode (gsymbol->name);
1206 if (gsymbol->bfd_section != NULL)
1208 bfd *obfd = gsymbol->bfd_section->owner;
1211 struct objfile *objf;
1214 if (obfd == objf->obfd)
1216 *resultp = obsavestring (decoded, strlen (decoded),
1217 &objf->objfile_obstack);
1223 /* Sometimes, we can't find a corresponding objfile, in which
1224 case, we put the result on the heap. Since we only decode
1225 when needed, we hope this usually does not cause a
1226 significant memory leak (FIXME). */
1227 if (*resultp == NULL)
1229 char **slot = (char **) htab_find_slot (decoded_names_store,
1232 *slot = xstrdup (decoded);
1241 ada_la_decode (const char *encoded, int options)
1243 return xstrdup (ada_decode (encoded));
1246 /* Returns non-zero iff SYM_NAME matches NAME, ignoring any trailing
1247 suffixes that encode debugging information or leading _ada_ on
1248 SYM_NAME (see is_name_suffix commentary for the debugging
1249 information that is ignored). If WILD, then NAME need only match a
1250 suffix of SYM_NAME minus the same suffixes. Also returns 0 if
1251 either argument is NULL. */
1254 ada_match_name (const char *sym_name, const char *name, int wild)
1256 if (sym_name == NULL || name == NULL)
1259 return wild_match (name, strlen (name), sym_name);
1262 int len_name = strlen (name);
1263 return (strncmp (sym_name, name, len_name) == 0
1264 && is_name_suffix (sym_name + len_name))
1265 || (strncmp (sym_name, "_ada_", 5) == 0
1266 && strncmp (sym_name + 5, name, len_name) == 0
1267 && is_name_suffix (sym_name + len_name + 5));
1271 /* True (non-zero) iff, in Ada mode, the symbol SYM should be
1272 suppressed in info listings. */
1275 ada_suppress_symbol_printing (struct symbol *sym)
1277 if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN)
1280 return is_suppressed_name (SYMBOL_LINKAGE_NAME (sym));
1286 /* Names of MAX_ADA_DIMENS bounds in P_BOUNDS fields of array descriptors. */
1288 static char *bound_name[] = {
1289 "LB0", "UB0", "LB1", "UB1", "LB2", "UB2", "LB3", "UB3",
1290 "LB4", "UB4", "LB5", "UB5", "LB6", "UB6", "LB7", "UB7"
1293 /* Maximum number of array dimensions we are prepared to handle. */
1295 #define MAX_ADA_DIMENS (sizeof(bound_name) / (2*sizeof(char *)))
1297 /* Like modify_field, but allows bitpos > wordlength. */
1300 modify_general_field (char *addr, LONGEST fieldval, int bitpos, int bitsize)
1302 modify_field (addr + bitpos / 8, fieldval, bitpos % 8, bitsize);
1306 /* The desc_* routines return primitive portions of array descriptors
1309 /* The descriptor or array type, if any, indicated by TYPE; removes
1310 level of indirection, if needed. */
1312 static struct type *
1313 desc_base_type (struct type *type)
1317 type = ada_check_typedef (type);
1319 && (TYPE_CODE (type) == TYPE_CODE_PTR
1320 || TYPE_CODE (type) == TYPE_CODE_REF))
1321 return ada_check_typedef (TYPE_TARGET_TYPE (type));
1326 /* True iff TYPE indicates a "thin" array pointer type. */
1329 is_thin_pntr (struct type *type)
1332 is_suffix (ada_type_name (desc_base_type (type)), "___XUT")
1333 || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE");
1336 /* The descriptor type for thin pointer type TYPE. */
1338 static struct type *
1339 thin_descriptor_type (struct type *type)
1341 struct type *base_type = desc_base_type (type);
1342 if (base_type == NULL)
1344 if (is_suffix (ada_type_name (base_type), "___XVE"))
1348 struct type *alt_type = ada_find_parallel_type (base_type, "___XVE");
1349 if (alt_type == NULL)
1356 /* A pointer to the array data for thin-pointer value VAL. */
1358 static struct value *
1359 thin_data_pntr (struct value *val)
1361 struct type *type = value_type (val);
1362 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1363 return value_cast (desc_data_type (thin_descriptor_type (type)),
1366 return value_from_longest (desc_data_type (thin_descriptor_type (type)),
1367 VALUE_ADDRESS (val) + value_offset (val));
1370 /* True iff TYPE indicates a "thick" array pointer type. */
1373 is_thick_pntr (struct type *type)
1375 type = desc_base_type (type);
1376 return (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT
1377 && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL);
1380 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1381 pointer to one, the type of its bounds data; otherwise, NULL. */
1383 static struct type *
1384 desc_bounds_type (struct type *type)
1388 type = desc_base_type (type);
1392 else if (is_thin_pntr (type))
1394 type = thin_descriptor_type (type);
1397 r = lookup_struct_elt_type (type, "BOUNDS", 1);
1399 return ada_check_typedef (r);
1401 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1403 r = lookup_struct_elt_type (type, "P_BOUNDS", 1);
1405 return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r)));
1410 /* If ARR is an array descriptor (fat or thin pointer), or pointer to
1411 one, a pointer to its bounds data. Otherwise NULL. */
1413 static struct value *
1414 desc_bounds (struct value *arr)
1416 struct type *type = ada_check_typedef (value_type (arr));
1417 if (is_thin_pntr (type))
1419 struct type *bounds_type =
1420 desc_bounds_type (thin_descriptor_type (type));
1423 if (bounds_type == NULL)
1424 error (_("Bad GNAT array descriptor"));
1426 /* NOTE: The following calculation is not really kosher, but
1427 since desc_type is an XVE-encoded type (and shouldn't be),
1428 the correct calculation is a real pain. FIXME (and fix GCC). */
1429 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1430 addr = value_as_long (arr);
1432 addr = VALUE_ADDRESS (arr) + value_offset (arr);
1435 value_from_longest (lookup_pointer_type (bounds_type),
1436 addr - TYPE_LENGTH (bounds_type));
1439 else if (is_thick_pntr (type))
1440 return value_struct_elt (&arr, NULL, "P_BOUNDS", NULL,
1441 _("Bad GNAT array descriptor"));
1446 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1447 position of the field containing the address of the bounds data. */
1450 fat_pntr_bounds_bitpos (struct type *type)
1452 return TYPE_FIELD_BITPOS (desc_base_type (type), 1);
1455 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1456 size of the field containing the address of the bounds data. */
1459 fat_pntr_bounds_bitsize (struct type *type)
1461 type = desc_base_type (type);
1463 if (TYPE_FIELD_BITSIZE (type, 1) > 0)
1464 return TYPE_FIELD_BITSIZE (type, 1);
1466 return 8 * TYPE_LENGTH (ada_check_typedef (TYPE_FIELD_TYPE (type, 1)));
1469 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1470 pointer to one, the type of its array data (a
1471 pointer-to-array-with-no-bounds type); otherwise, NULL. Use
1472 ada_type_of_array to get an array type with bounds data. */
1474 static struct type *
1475 desc_data_type (struct type *type)
1477 type = desc_base_type (type);
1479 /* NOTE: The following is bogus; see comment in desc_bounds. */
1480 if (is_thin_pntr (type))
1481 return lookup_pointer_type
1482 (desc_base_type (TYPE_FIELD_TYPE (thin_descriptor_type (type), 1)));
1483 else if (is_thick_pntr (type))
1484 return lookup_struct_elt_type (type, "P_ARRAY", 1);
1489 /* If ARR is an array descriptor (fat or thin pointer), a pointer to
1492 static struct value *
1493 desc_data (struct value *arr)
1495 struct type *type = value_type (arr);
1496 if (is_thin_pntr (type))
1497 return thin_data_pntr (arr);
1498 else if (is_thick_pntr (type))
1499 return value_struct_elt (&arr, NULL, "P_ARRAY", NULL,
1500 _("Bad GNAT array descriptor"));
1506 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1507 position of the field containing the address of the data. */
1510 fat_pntr_data_bitpos (struct type *type)
1512 return TYPE_FIELD_BITPOS (desc_base_type (type), 0);
1515 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1516 size of the field containing the address of the data. */
1519 fat_pntr_data_bitsize (struct type *type)
1521 type = desc_base_type (type);
1523 if (TYPE_FIELD_BITSIZE (type, 0) > 0)
1524 return TYPE_FIELD_BITSIZE (type, 0);
1526 return TARGET_CHAR_BIT * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
1529 /* If BOUNDS is an array-bounds structure (or pointer to one), return
1530 the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1531 bound, if WHICH is 1. The first bound is I=1. */
1533 static struct value *
1534 desc_one_bound (struct value *bounds, int i, int which)
1536 return value_struct_elt (&bounds, NULL, bound_name[2 * i + which - 2], NULL,
1537 _("Bad GNAT array descriptor bounds"));
1540 /* If BOUNDS is an array-bounds structure type, return the bit position
1541 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1542 bound, if WHICH is 1. The first bound is I=1. */
1545 desc_bound_bitpos (struct type *type, int i, int which)
1547 return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2);
1550 /* If BOUNDS is an array-bounds structure type, return the bit field size
1551 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1552 bound, if WHICH is 1. The first bound is I=1. */
1555 desc_bound_bitsize (struct type *type, int i, int which)
1557 type = desc_base_type (type);
1559 if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0)
1560 return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2);
1562 return 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 2 * i + which - 2));
1565 /* If TYPE is the type of an array-bounds structure, the type of its
1566 Ith bound (numbering from 1). Otherwise, NULL. */
1568 static struct type *
1569 desc_index_type (struct type *type, int i)
1571 type = desc_base_type (type);
1573 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1574 return lookup_struct_elt_type (type, bound_name[2 * i - 2], 1);
1579 /* The number of index positions in the array-bounds type TYPE.
1580 Return 0 if TYPE is NULL. */
1583 desc_arity (struct type *type)
1585 type = desc_base_type (type);
1588 return TYPE_NFIELDS (type) / 2;
1592 /* Non-zero iff TYPE is a simple array type (not a pointer to one) or
1593 an array descriptor type (representing an unconstrained array
1597 ada_is_direct_array_type (struct type *type)
1601 type = ada_check_typedef (type);
1602 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1603 || ada_is_array_descriptor_type (type));
1606 /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer
1610 ada_is_array_type (struct type *type)
1613 && (TYPE_CODE (type) == TYPE_CODE_PTR
1614 || TYPE_CODE (type) == TYPE_CODE_REF))
1615 type = TYPE_TARGET_TYPE (type);
1616 return ada_is_direct_array_type (type);
1619 /* Non-zero iff TYPE is a simple array type or pointer to one. */
1622 ada_is_simple_array_type (struct type *type)
1626 type = ada_check_typedef (type);
1627 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1628 || (TYPE_CODE (type) == TYPE_CODE_PTR
1629 && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY));
1632 /* Non-zero iff TYPE belongs to a GNAT array descriptor. */
1635 ada_is_array_descriptor_type (struct type *type)
1637 struct type *data_type = desc_data_type (type);
1641 type = ada_check_typedef (type);
1644 && ((TYPE_CODE (data_type) == TYPE_CODE_PTR
1645 && TYPE_TARGET_TYPE (data_type) != NULL
1646 && TYPE_CODE (TYPE_TARGET_TYPE (data_type)) == TYPE_CODE_ARRAY)
1647 || TYPE_CODE (data_type) == TYPE_CODE_ARRAY)
1648 && desc_arity (desc_bounds_type (type)) > 0;
1651 /* Non-zero iff type is a partially mal-formed GNAT array
1652 descriptor. FIXME: This is to compensate for some problems with
1653 debugging output from GNAT. Re-examine periodically to see if it
1657 ada_is_bogus_array_descriptor (struct type *type)
1661 && TYPE_CODE (type) == TYPE_CODE_STRUCT
1662 && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL
1663 || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL)
1664 && !ada_is_array_descriptor_type (type);
1668 /* If ARR has a record type in the form of a standard GNAT array descriptor,
1669 (fat pointer) returns the type of the array data described---specifically,
1670 a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled
1671 in from the descriptor; otherwise, they are left unspecified. If
1672 the ARR denotes a null array descriptor and BOUNDS is non-zero,
1673 returns NULL. The result is simply the type of ARR if ARR is not
1676 ada_type_of_array (struct value *arr, int bounds)
1678 if (ada_is_packed_array_type (value_type (arr)))
1679 return decode_packed_array_type (value_type (arr));
1681 if (!ada_is_array_descriptor_type (value_type (arr)))
1682 return value_type (arr);
1686 ada_check_typedef (TYPE_TARGET_TYPE (desc_data_type (value_type (arr))));
1689 struct type *elt_type;
1691 struct value *descriptor;
1692 struct objfile *objf = TYPE_OBJFILE (value_type (arr));
1694 elt_type = ada_array_element_type (value_type (arr), -1);
1695 arity = ada_array_arity (value_type (arr));
1697 if (elt_type == NULL || arity == 0)
1698 return ada_check_typedef (value_type (arr));
1700 descriptor = desc_bounds (arr);
1701 if (value_as_long (descriptor) == 0)
1705 struct type *range_type = alloc_type (objf);
1706 struct type *array_type = alloc_type (objf);
1707 struct value *low = desc_one_bound (descriptor, arity, 0);
1708 struct value *high = desc_one_bound (descriptor, arity, 1);
1711 create_range_type (range_type, value_type (low),
1712 longest_to_int (value_as_long (low)),
1713 longest_to_int (value_as_long (high)));
1714 elt_type = create_array_type (array_type, elt_type, range_type);
1717 return lookup_pointer_type (elt_type);
1721 /* If ARR does not represent an array, returns ARR unchanged.
1722 Otherwise, returns either a standard GDB array with bounds set
1723 appropriately or, if ARR is a non-null fat pointer, a pointer to a standard
1724 GDB array. Returns NULL if ARR is a null fat pointer. */
1727 ada_coerce_to_simple_array_ptr (struct value *arr)
1729 if (ada_is_array_descriptor_type (value_type (arr)))
1731 struct type *arrType = ada_type_of_array (arr, 1);
1732 if (arrType == NULL)
1734 return value_cast (arrType, value_copy (desc_data (arr)));
1736 else if (ada_is_packed_array_type (value_type (arr)))
1737 return decode_packed_array (arr);
1742 /* If ARR does not represent an array, returns ARR unchanged.
1743 Otherwise, returns a standard GDB array describing ARR (which may
1744 be ARR itself if it already is in the proper form). */
1746 static struct value *
1747 ada_coerce_to_simple_array (struct value *arr)
1749 if (ada_is_array_descriptor_type (value_type (arr)))
1751 struct value *arrVal = ada_coerce_to_simple_array_ptr (arr);
1753 error (_("Bounds unavailable for null array pointer."));
1754 check_size (TYPE_TARGET_TYPE (value_type (arrVal)));
1755 return value_ind (arrVal);
1757 else if (ada_is_packed_array_type (value_type (arr)))
1758 return decode_packed_array (arr);
1763 /* If TYPE represents a GNAT array type, return it translated to an
1764 ordinary GDB array type (possibly with BITSIZE fields indicating
1765 packing). For other types, is the identity. */
1768 ada_coerce_to_simple_array_type (struct type *type)
1770 struct value *mark = value_mark ();
1771 struct value *dummy = value_from_longest (builtin_type_long, 0);
1772 struct type *result;
1773 deprecated_set_value_type (dummy, type);
1774 result = ada_type_of_array (dummy, 0);
1775 value_free_to_mark (mark);
1779 /* Non-zero iff TYPE represents a standard GNAT packed-array type. */
1782 ada_is_packed_array_type (struct type *type)
1786 type = desc_base_type (type);
1787 type = ada_check_typedef (type);
1789 ada_type_name (type) != NULL
1790 && strstr (ada_type_name (type), "___XP") != NULL;
1793 /* Given that TYPE is a standard GDB array type with all bounds filled
1794 in, and that the element size of its ultimate scalar constituents
1795 (that is, either its elements, or, if it is an array of arrays, its
1796 elements' elements, etc.) is *ELT_BITS, return an identical type,
1797 but with the bit sizes of its elements (and those of any
1798 constituent arrays) recorded in the BITSIZE components of its
1799 TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size
1802 static struct type *
1803 packed_array_type (struct type *type, long *elt_bits)
1805 struct type *new_elt_type;
1806 struct type *new_type;
1807 LONGEST low_bound, high_bound;
1809 type = ada_check_typedef (type);
1810 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
1813 new_type = alloc_type (TYPE_OBJFILE (type));
1814 new_elt_type = packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)),
1816 create_array_type (new_type, new_elt_type, TYPE_FIELD_TYPE (type, 0));
1817 TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits;
1818 TYPE_NAME (new_type) = ada_type_name (type);
1820 if (get_discrete_bounds (TYPE_FIELD_TYPE (type, 0),
1821 &low_bound, &high_bound) < 0)
1822 low_bound = high_bound = 0;
1823 if (high_bound < low_bound)
1824 *elt_bits = TYPE_LENGTH (new_type) = 0;
1827 *elt_bits *= (high_bound - low_bound + 1);
1828 TYPE_LENGTH (new_type) =
1829 (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
1832 TYPE_FLAGS (new_type) |= TYPE_FLAG_FIXED_INSTANCE;
1836 /* The array type encoded by TYPE, where ada_is_packed_array_type (TYPE). */
1838 static struct type *
1839 decode_packed_array_type (struct type *type)
1842 struct block **blocks;
1843 char *raw_name = ada_type_name (ada_check_typedef (type));
1846 struct type *shadow_type;
1851 raw_name = ada_type_name (desc_base_type (type));
1856 name = (char *) alloca (strlen (raw_name) + 1);
1857 tail = strstr (raw_name, "___XP");
1858 type = desc_base_type (type);
1860 memcpy (name, raw_name, tail - raw_name);
1861 name[tail - raw_name] = '\000';
1863 sym = standard_lookup (name, get_selected_block (0), VAR_DOMAIN);
1864 if (sym == NULL || SYMBOL_TYPE (sym) == NULL)
1866 lim_warning (_("could not find bounds information on packed array"));
1869 shadow_type = SYMBOL_TYPE (sym);
1871 if (TYPE_CODE (shadow_type) != TYPE_CODE_ARRAY)
1873 lim_warning (_("could not understand bounds information on packed array"));
1877 if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1)
1880 (_("could not understand bit size information on packed array"));
1884 return packed_array_type (shadow_type, &bits);
1887 /* Given that ARR is a struct value *indicating a GNAT packed array,
1888 returns a simple array that denotes that array. Its type is a
1889 standard GDB array type except that the BITSIZEs of the array
1890 target types are set to the number of bits in each element, and the
1891 type length is set appropriately. */
1893 static struct value *
1894 decode_packed_array (struct value *arr)
1898 arr = ada_coerce_ref (arr);
1899 if (TYPE_CODE (value_type (arr)) == TYPE_CODE_PTR)
1900 arr = ada_value_ind (arr);
1902 type = decode_packed_array_type (value_type (arr));
1905 error (_("can't unpack array"));
1909 if (gdbarch_bits_big_endian (current_gdbarch)
1910 && ada_is_modular_type (value_type (arr)))
1912 /* This is a (right-justified) modular type representing a packed
1913 array with no wrapper. In order to interpret the value through
1914 the (left-justified) packed array type we just built, we must
1915 first left-justify it. */
1916 int bit_size, bit_pos;
1919 mod = ada_modulus (value_type (arr)) - 1;
1926 bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size;
1927 arr = ada_value_primitive_packed_val (arr, NULL,
1928 bit_pos / HOST_CHAR_BIT,
1929 bit_pos % HOST_CHAR_BIT,
1934 return coerce_unspec_val_to_type (arr, type);
1938 /* The value of the element of packed array ARR at the ARITY indices
1939 given in IND. ARR must be a simple array. */
1941 static struct value *
1942 value_subscript_packed (struct value *arr, int arity, struct value **ind)
1945 int bits, elt_off, bit_off;
1946 long elt_total_bit_offset;
1947 struct type *elt_type;
1951 elt_total_bit_offset = 0;
1952 elt_type = ada_check_typedef (value_type (arr));
1953 for (i = 0; i < arity; i += 1)
1955 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY
1956 || TYPE_FIELD_BITSIZE (elt_type, 0) == 0)
1958 (_("attempt to do packed indexing of something other than a packed array"));
1961 struct type *range_type = TYPE_INDEX_TYPE (elt_type);
1962 LONGEST lowerbound, upperbound;
1965 if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0)
1967 lim_warning (_("don't know bounds of array"));
1968 lowerbound = upperbound = 0;
1971 idx = value_as_long (value_pos_atr (ind[i]));
1972 if (idx < lowerbound || idx > upperbound)
1973 lim_warning (_("packed array index %ld out of bounds"), (long) idx);
1974 bits = TYPE_FIELD_BITSIZE (elt_type, 0);
1975 elt_total_bit_offset += (idx - lowerbound) * bits;
1976 elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type));
1979 elt_off = elt_total_bit_offset / HOST_CHAR_BIT;
1980 bit_off = elt_total_bit_offset % HOST_CHAR_BIT;
1982 v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off,
1987 /* Non-zero iff TYPE includes negative integer values. */
1990 has_negatives (struct type *type)
1992 switch (TYPE_CODE (type))
1997 return !TYPE_UNSIGNED (type);
1998 case TYPE_CODE_RANGE:
1999 return TYPE_LOW_BOUND (type) < 0;
2004 /* Create a new value of type TYPE from the contents of OBJ starting
2005 at byte OFFSET, and bit offset BIT_OFFSET within that byte,
2006 proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then
2007 assigning through the result will set the field fetched from.
2008 VALADDR is ignored unless OBJ is NULL, in which case,
2009 VALADDR+OFFSET must address the start of storage containing the
2010 packed value. The value returned in this case is never an lval.
2011 Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */
2014 ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr,
2015 long offset, int bit_offset, int bit_size,
2019 int src, /* Index into the source area */
2020 targ, /* Index into the target area */
2021 srcBitsLeft, /* Number of source bits left to move */
2022 nsrc, ntarg, /* Number of source and target bytes */
2023 unusedLS, /* Number of bits in next significant
2024 byte of source that are unused */
2025 accumSize; /* Number of meaningful bits in accum */
2026 unsigned char *bytes; /* First byte containing data to unpack */
2027 unsigned char *unpacked;
2028 unsigned long accum; /* Staging area for bits being transferred */
2030 int len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8;
2031 /* Transmit bytes from least to most significant; delta is the direction
2032 the indices move. */
2033 int delta = gdbarch_bits_big_endian (current_gdbarch) ? -1 : 1;
2035 type = ada_check_typedef (type);
2039 v = allocate_value (type);
2040 bytes = (unsigned char *) (valaddr + offset);
2042 else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj))
2045 VALUE_ADDRESS (obj) + value_offset (obj) + offset);
2046 bytes = (unsigned char *) alloca (len);
2047 read_memory (VALUE_ADDRESS (v), bytes, len);
2051 v = allocate_value (type);
2052 bytes = (unsigned char *) value_contents (obj) + offset;
2057 VALUE_LVAL (v) = VALUE_LVAL (obj);
2058 if (VALUE_LVAL (obj) == lval_internalvar)
2059 VALUE_LVAL (v) = lval_internalvar_component;
2060 VALUE_ADDRESS (v) = VALUE_ADDRESS (obj) + value_offset (obj) + offset;
2061 set_value_bitpos (v, bit_offset + value_bitpos (obj));
2062 set_value_bitsize (v, bit_size);
2063 if (value_bitpos (v) >= HOST_CHAR_BIT)
2065 VALUE_ADDRESS (v) += 1;
2066 set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT);
2070 set_value_bitsize (v, bit_size);
2071 unpacked = (unsigned char *) value_contents (v);
2073 srcBitsLeft = bit_size;
2075 ntarg = TYPE_LENGTH (type);
2079 memset (unpacked, 0, TYPE_LENGTH (type));
2082 else if (gdbarch_bits_big_endian (current_gdbarch))
2085 if (has_negatives (type)
2086 && ((bytes[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1))))
2090 (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT)
2093 switch (TYPE_CODE (type))
2095 case TYPE_CODE_ARRAY:
2096 case TYPE_CODE_UNION:
2097 case TYPE_CODE_STRUCT:
2098 /* Non-scalar values must be aligned at a byte boundary... */
2100 (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT;
2101 /* ... And are placed at the beginning (most-significant) bytes
2103 targ = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1;
2107 targ = TYPE_LENGTH (type) - 1;
2113 int sign_bit_offset = (bit_size + bit_offset - 1) % 8;
2116 unusedLS = bit_offset;
2119 if (has_negatives (type) && (bytes[len - 1] & (1 << sign_bit_offset)))
2126 /* Mask for removing bits of the next source byte that are not
2127 part of the value. */
2128 unsigned int unusedMSMask =
2129 (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) -
2131 /* Sign-extend bits for this byte. */
2132 unsigned int signMask = sign & ~unusedMSMask;
2134 (((bytes[src] >> unusedLS) & unusedMSMask) | signMask) << accumSize;
2135 accumSize += HOST_CHAR_BIT - unusedLS;
2136 if (accumSize >= HOST_CHAR_BIT)
2138 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2139 accumSize -= HOST_CHAR_BIT;
2140 accum >>= HOST_CHAR_BIT;
2144 srcBitsLeft -= HOST_CHAR_BIT - unusedLS;
2151 accum |= sign << accumSize;
2152 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2153 accumSize -= HOST_CHAR_BIT;
2154 accum >>= HOST_CHAR_BIT;
2162 /* Move N bits from SOURCE, starting at bit offset SRC_OFFSET to
2163 TARGET, starting at bit offset TARG_OFFSET. SOURCE and TARGET must
2166 move_bits (gdb_byte *target, int targ_offset, const gdb_byte *source,
2167 int src_offset, int n)
2169 unsigned int accum, mask;
2170 int accum_bits, chunk_size;
2172 target += targ_offset / HOST_CHAR_BIT;
2173 targ_offset %= HOST_CHAR_BIT;
2174 source += src_offset / HOST_CHAR_BIT;
2175 src_offset %= HOST_CHAR_BIT;
2176 if (gdbarch_bits_big_endian (current_gdbarch))
2178 accum = (unsigned char) *source;
2180 accum_bits = HOST_CHAR_BIT - src_offset;
2185 accum = (accum << HOST_CHAR_BIT) + (unsigned char) *source;
2186 accum_bits += HOST_CHAR_BIT;
2188 chunk_size = HOST_CHAR_BIT - targ_offset;
2191 unused_right = HOST_CHAR_BIT - (chunk_size + targ_offset);
2192 mask = ((1 << chunk_size) - 1) << unused_right;
2195 | ((accum >> (accum_bits - chunk_size - unused_right)) & mask);
2197 accum_bits -= chunk_size;
2204 accum = (unsigned char) *source >> src_offset;
2206 accum_bits = HOST_CHAR_BIT - src_offset;
2210 accum = accum + ((unsigned char) *source << accum_bits);
2211 accum_bits += HOST_CHAR_BIT;
2213 chunk_size = HOST_CHAR_BIT - targ_offset;
2216 mask = ((1 << chunk_size) - 1) << targ_offset;
2217 *target = (*target & ~mask) | ((accum << targ_offset) & mask);
2219 accum_bits -= chunk_size;
2220 accum >>= chunk_size;
2227 /* Store the contents of FROMVAL into the location of TOVAL.
2228 Return a new value with the location of TOVAL and contents of
2229 FROMVAL. Handles assignment into packed fields that have
2230 floating-point or non-scalar types. */
2232 static struct value *
2233 ada_value_assign (struct value *toval, struct value *fromval)
2235 struct type *type = value_type (toval);
2236 int bits = value_bitsize (toval);
2238 toval = ada_coerce_ref (toval);
2239 fromval = ada_coerce_ref (fromval);
2241 if (ada_is_direct_array_type (value_type (toval)))
2242 toval = ada_coerce_to_simple_array (toval);
2243 if (ada_is_direct_array_type (value_type (fromval)))
2244 fromval = ada_coerce_to_simple_array (fromval);
2246 if (!deprecated_value_modifiable (toval))
2247 error (_("Left operand of assignment is not a modifiable lvalue."));
2249 if (VALUE_LVAL (toval) == lval_memory
2251 && (TYPE_CODE (type) == TYPE_CODE_FLT
2252 || TYPE_CODE (type) == TYPE_CODE_STRUCT))
2254 int len = (value_bitpos (toval)
2255 + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2257 char *buffer = (char *) alloca (len);
2259 CORE_ADDR to_addr = VALUE_ADDRESS (toval) + value_offset (toval);
2261 if (TYPE_CODE (type) == TYPE_CODE_FLT)
2262 fromval = value_cast (type, fromval);
2264 read_memory (to_addr, buffer, len);
2265 from_size = value_bitsize (fromval);
2267 from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT;
2268 if (gdbarch_bits_big_endian (current_gdbarch))
2269 move_bits (buffer, value_bitpos (toval),
2270 value_contents (fromval), from_size - bits, bits);
2272 move_bits (buffer, value_bitpos (toval), value_contents (fromval),
2274 write_memory (to_addr, buffer, len);
2275 if (deprecated_memory_changed_hook)
2276 deprecated_memory_changed_hook (to_addr, len);
2278 val = value_copy (toval);
2279 memcpy (value_contents_raw (val), value_contents (fromval),
2280 TYPE_LENGTH (type));
2281 deprecated_set_value_type (val, type);
2286 return value_assign (toval, fromval);
2290 /* Given that COMPONENT is a memory lvalue that is part of the lvalue
2291 * CONTAINER, assign the contents of VAL to COMPONENTS's place in
2292 * CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not
2293 * COMPONENT, and not the inferior's memory. The current contents
2294 * of COMPONENT are ignored. */
2296 value_assign_to_component (struct value *container, struct value *component,
2299 LONGEST offset_in_container =
2300 (LONGEST) (VALUE_ADDRESS (component) + value_offset (component)
2301 - VALUE_ADDRESS (container) - value_offset (container));
2302 int bit_offset_in_container =
2303 value_bitpos (component) - value_bitpos (container);
2306 val = value_cast (value_type (component), val);
2308 if (value_bitsize (component) == 0)
2309 bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component));
2311 bits = value_bitsize (component);
2313 if (gdbarch_bits_big_endian (current_gdbarch))
2314 move_bits (value_contents_writeable (container) + offset_in_container,
2315 value_bitpos (container) + bit_offset_in_container,
2316 value_contents (val),
2317 TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits,
2320 move_bits (value_contents_writeable (container) + offset_in_container,
2321 value_bitpos (container) + bit_offset_in_container,
2322 value_contents (val), 0, bits);
2325 /* The value of the element of array ARR at the ARITY indices given in IND.
2326 ARR may be either a simple array, GNAT array descriptor, or pointer
2330 ada_value_subscript (struct value *arr, int arity, struct value **ind)
2334 struct type *elt_type;
2336 elt = ada_coerce_to_simple_array (arr);
2338 elt_type = ada_check_typedef (value_type (elt));
2339 if (TYPE_CODE (elt_type) == TYPE_CODE_ARRAY
2340 && TYPE_FIELD_BITSIZE (elt_type, 0) > 0)
2341 return value_subscript_packed (elt, arity, ind);
2343 for (k = 0; k < arity; k += 1)
2345 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY)
2346 error (_("too many subscripts (%d expected)"), k);
2347 elt = value_subscript (elt, value_pos_atr (ind[k]));
2352 /* Assuming ARR is a pointer to a standard GDB array of type TYPE, the
2353 value of the element of *ARR at the ARITY indices given in
2354 IND. Does not read the entire array into memory. */
2357 ada_value_ptr_subscript (struct value *arr, struct type *type, int arity,
2362 for (k = 0; k < arity; k += 1)
2367 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2368 error (_("too many subscripts (%d expected)"), k);
2369 arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2371 get_discrete_bounds (TYPE_INDEX_TYPE (type), &lwb, &upb);
2372 idx = value_pos_atr (ind[k]);
2374 idx = value_sub (idx, value_from_longest (builtin_type_int, lwb));
2375 arr = value_add (arr, idx);
2376 type = TYPE_TARGET_TYPE (type);
2379 return value_ind (arr);
2382 /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the
2383 actual type of ARRAY_PTR is ignored), returns a reference to
2384 the Ada slice of HIGH-LOW+1 elements starting at index LOW. The lower
2385 bound of this array is LOW, as per Ada rules. */
2386 static struct value *
2387 ada_value_slice_ptr (struct value *array_ptr, struct type *type,
2390 CORE_ADDR base = value_as_address (array_ptr)
2391 + ((low - TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)))
2392 * TYPE_LENGTH (TYPE_TARGET_TYPE (type)));
2393 struct type *index_type =
2394 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type)),
2396 struct type *slice_type =
2397 create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type);
2398 return value_from_pointer (lookup_reference_type (slice_type), base);
2402 static struct value *
2403 ada_value_slice (struct value *array, int low, int high)
2405 struct type *type = value_type (array);
2406 struct type *index_type =
2407 create_range_type (NULL, TYPE_INDEX_TYPE (type), low, high);
2408 struct type *slice_type =
2409 create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type);
2410 return value_cast (slice_type, value_slice (array, low, high - low + 1));
2413 /* If type is a record type in the form of a standard GNAT array
2414 descriptor, returns the number of dimensions for type. If arr is a
2415 simple array, returns the number of "array of"s that prefix its
2416 type designation. Otherwise, returns 0. */
2419 ada_array_arity (struct type *type)
2426 type = desc_base_type (type);
2429 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
2430 return desc_arity (desc_bounds_type (type));
2432 while (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2435 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
2441 /* If TYPE is a record type in the form of a standard GNAT array
2442 descriptor or a simple array type, returns the element type for
2443 TYPE after indexing by NINDICES indices, or by all indices if
2444 NINDICES is -1. Otherwise, returns NULL. */
2447 ada_array_element_type (struct type *type, int nindices)
2449 type = desc_base_type (type);
2451 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
2454 struct type *p_array_type;
2456 p_array_type = desc_data_type (type);
2458 k = ada_array_arity (type);
2462 /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */
2463 if (nindices >= 0 && k > nindices)
2465 p_array_type = TYPE_TARGET_TYPE (p_array_type);
2466 while (k > 0 && p_array_type != NULL)
2468 p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type));
2471 return p_array_type;
2473 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2475 while (nindices != 0 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
2477 type = TYPE_TARGET_TYPE (type);
2486 /* The type of nth index in arrays of given type (n numbering from 1).
2487 Does not examine memory. */
2490 ada_index_type (struct type *type, int n)
2492 struct type *result_type;
2494 type = desc_base_type (type);
2496 if (n > ada_array_arity (type))
2499 if (ada_is_simple_array_type (type))
2503 for (i = 1; i < n; i += 1)
2504 type = TYPE_TARGET_TYPE (type);
2505 result_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0));
2506 /* FIXME: The stabs type r(0,0);bound;bound in an array type
2507 has a target type of TYPE_CODE_UNDEF. We compensate here, but
2508 perhaps stabsread.c would make more sense. */
2509 if (result_type == NULL || TYPE_CODE (result_type) == TYPE_CODE_UNDEF)
2510 result_type = builtin_type_int;
2515 return desc_index_type (desc_bounds_type (type), n);
2518 /* Given that arr is an array type, returns the lower bound of the
2519 Nth index (numbering from 1) if WHICH is 0, and the upper bound if
2520 WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an
2521 array-descriptor type. If TYPEP is non-null, *TYPEP is set to the
2522 bounds type. It works for other arrays with bounds supplied by
2523 run-time quantities other than discriminants. */
2526 ada_array_bound_from_type (struct type * arr_type, int n, int which,
2527 struct type ** typep)
2530 struct type *index_type_desc;
2532 if (ada_is_packed_array_type (arr_type))
2533 arr_type = decode_packed_array_type (arr_type);
2535 if (arr_type == NULL || !ada_is_simple_array_type (arr_type))
2538 *typep = builtin_type_int;
2539 return (LONGEST) - which;
2542 if (TYPE_CODE (arr_type) == TYPE_CODE_PTR)
2543 type = TYPE_TARGET_TYPE (arr_type);
2547 index_type_desc = ada_find_parallel_type (type, "___XA");
2548 if (index_type_desc == NULL)
2550 struct type *index_type;
2554 type = TYPE_TARGET_TYPE (type);
2558 index_type = TYPE_INDEX_TYPE (type);
2560 *typep = index_type;
2562 /* The index type is either a range type or an enumerated type.
2563 For the range type, we have some macros that allow us to
2564 extract the value of the low and high bounds. But they
2565 do now work for enumerated types. The expressions used
2566 below work for both range and enum types. */
2568 (LONGEST) (which == 0
2569 ? TYPE_FIELD_BITPOS (index_type, 0)
2570 : TYPE_FIELD_BITPOS (index_type,
2571 TYPE_NFIELDS (index_type) - 1));
2575 struct type *index_type =
2576 to_fixed_range_type (TYPE_FIELD_NAME (index_type_desc, n - 1),
2577 NULL, TYPE_OBJFILE (arr_type));
2580 *typep = index_type;
2583 (LONGEST) (which == 0
2584 ? TYPE_LOW_BOUND (index_type)
2585 : TYPE_HIGH_BOUND (index_type));
2589 /* Given that arr is an array value, returns the lower bound of the
2590 nth index (numbering from 1) if WHICH is 0, and the upper bound if
2591 WHICH is 1. This routine will also work for arrays with bounds
2592 supplied by run-time quantities other than discriminants. */
2595 ada_array_bound (struct value *arr, int n, int which)
2597 struct type *arr_type = value_type (arr);
2599 if (ada_is_packed_array_type (arr_type))
2600 return ada_array_bound (decode_packed_array (arr), n, which);
2601 else if (ada_is_simple_array_type (arr_type))
2604 LONGEST v = ada_array_bound_from_type (arr_type, n, which, &type);
2605 return value_from_longest (type, v);
2608 return desc_one_bound (desc_bounds (arr), n, which);
2611 /* Given that arr is an array value, returns the length of the
2612 nth index. This routine will also work for arrays with bounds
2613 supplied by run-time quantities other than discriminants.
2614 Does not work for arrays indexed by enumeration types with representation
2615 clauses at the moment. */
2618 ada_array_length (struct value *arr, int n)
2620 struct type *arr_type = ada_check_typedef (value_type (arr));
2622 if (ada_is_packed_array_type (arr_type))
2623 return ada_array_length (decode_packed_array (arr), n);
2625 if (ada_is_simple_array_type (arr_type))
2629 ada_array_bound_from_type (arr_type, n, 1, &type) -
2630 ada_array_bound_from_type (arr_type, n, 0, NULL) + 1;
2631 return value_from_longest (type, v);
2635 value_from_longest (builtin_type_int,
2636 value_as_long (desc_one_bound (desc_bounds (arr),
2638 - value_as_long (desc_one_bound (desc_bounds (arr),
2642 /* An empty array whose type is that of ARR_TYPE (an array type),
2643 with bounds LOW to LOW-1. */
2645 static struct value *
2646 empty_array (struct type *arr_type, int low)
2648 struct type *index_type =
2649 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type)),
2651 struct type *elt_type = ada_array_element_type (arr_type, 1);
2652 return allocate_value (create_array_type (NULL, elt_type, index_type));
2656 /* Name resolution */
2658 /* The "decoded" name for the user-definable Ada operator corresponding
2662 ada_decoded_op_name (enum exp_opcode op)
2666 for (i = 0; ada_opname_table[i].encoded != NULL; i += 1)
2668 if (ada_opname_table[i].op == op)
2669 return ada_opname_table[i].decoded;
2671 error (_("Could not find operator name for opcode"));
2675 /* Same as evaluate_type (*EXP), but resolves ambiguous symbol
2676 references (marked by OP_VAR_VALUE nodes in which the symbol has an
2677 undefined namespace) and converts operators that are
2678 user-defined into appropriate function calls. If CONTEXT_TYPE is
2679 non-null, it provides a preferred result type [at the moment, only
2680 type void has any effect---causing procedures to be preferred over
2681 functions in calls]. A null CONTEXT_TYPE indicates that a non-void
2682 return type is preferred. May change (expand) *EXP. */
2685 resolve (struct expression **expp, int void_context_p)
2689 resolve_subexp (expp, &pc, 1, void_context_p ? builtin_type_void : NULL);
2692 /* Resolve the operator of the subexpression beginning at
2693 position *POS of *EXPP. "Resolving" consists of replacing
2694 the symbols that have undefined namespaces in OP_VAR_VALUE nodes
2695 with their resolutions, replacing built-in operators with
2696 function calls to user-defined operators, where appropriate, and,
2697 when DEPROCEDURE_P is non-zero, converting function-valued variables
2698 into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions
2699 are as in ada_resolve, above. */
2701 static struct value *
2702 resolve_subexp (struct expression **expp, int *pos, int deprocedure_p,
2703 struct type *context_type)
2707 struct expression *exp; /* Convenience: == *expp. */
2708 enum exp_opcode op = (*expp)->elts[pc].opcode;
2709 struct value **argvec; /* Vector of operand types (alloca'ed). */
2710 int nargs; /* Number of operands. */
2717 /* Pass one: resolve operands, saving their types and updating *pos,
2722 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
2723 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
2728 resolve_subexp (expp, pos, 0, NULL);
2730 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2735 resolve_subexp (expp, pos, 0, NULL);
2740 resolve_subexp (expp, pos, 1, exp->elts[pc + 1].type);
2743 case OP_ATR_MODULUS:
2753 case TERNOP_IN_RANGE:
2754 case BINOP_IN_BOUNDS:
2760 case OP_DISCRETE_RANGE:
2762 ada_forward_operator_length (exp, pc, &oplen, &nargs);
2771 arg1 = resolve_subexp (expp, pos, 0, NULL);
2773 resolve_subexp (expp, pos, 1, NULL);
2775 resolve_subexp (expp, pos, 1, value_type (arg1));
2792 case BINOP_LOGICAL_AND:
2793 case BINOP_LOGICAL_OR:
2794 case BINOP_BITWISE_AND:
2795 case BINOP_BITWISE_IOR:
2796 case BINOP_BITWISE_XOR:
2799 case BINOP_NOTEQUAL:
2806 case BINOP_SUBSCRIPT:
2814 case UNOP_LOGICAL_NOT:
2830 case OP_INTERNALVAR:
2840 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
2843 case STRUCTOP_STRUCT:
2844 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
2857 error (_("Unexpected operator during name resolution"));
2860 argvec = (struct value * *) alloca (sizeof (struct value *) * (nargs + 1));
2861 for (i = 0; i < nargs; i += 1)
2862 argvec[i] = resolve_subexp (expp, pos, 1, NULL);
2866 /* Pass two: perform any resolution on principal operator. */
2873 if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
2875 struct ada_symbol_info *candidates;
2879 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
2880 (exp->elts[pc + 2].symbol),
2881 exp->elts[pc + 1].block, VAR_DOMAIN,
2884 if (n_candidates > 1)
2886 /* Types tend to get re-introduced locally, so if there
2887 are any local symbols that are not types, first filter
2890 for (j = 0; j < n_candidates; j += 1)
2891 switch (SYMBOL_CLASS (candidates[j].sym))
2896 case LOC_REGPARM_ADDR:
2904 if (j < n_candidates)
2907 while (j < n_candidates)
2909 if (SYMBOL_CLASS (candidates[j].sym) == LOC_TYPEDEF)
2911 candidates[j] = candidates[n_candidates - 1];
2920 if (n_candidates == 0)
2921 error (_("No definition found for %s"),
2922 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
2923 else if (n_candidates == 1)
2925 else if (deprocedure_p
2926 && !is_nonfunction (candidates, n_candidates))
2928 i = ada_resolve_function
2929 (candidates, n_candidates, NULL, 0,
2930 SYMBOL_LINKAGE_NAME (exp->elts[pc + 2].symbol),
2933 error (_("Could not find a match for %s"),
2934 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
2938 printf_filtered (_("Multiple matches for %s\n"),
2939 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
2940 user_select_syms (candidates, n_candidates, 1);
2944 exp->elts[pc + 1].block = candidates[i].block;
2945 exp->elts[pc + 2].symbol = candidates[i].sym;
2946 if (innermost_block == NULL
2947 || contained_in (candidates[i].block, innermost_block))
2948 innermost_block = candidates[i].block;
2952 && (TYPE_CODE (SYMBOL_TYPE (exp->elts[pc + 2].symbol))
2955 replace_operator_with_call (expp, pc, 0, 0,
2956 exp->elts[pc + 2].symbol,
2957 exp->elts[pc + 1].block);
2964 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
2965 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
2967 struct ada_symbol_info *candidates;
2971 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
2972 (exp->elts[pc + 5].symbol),
2973 exp->elts[pc + 4].block, VAR_DOMAIN,
2975 if (n_candidates == 1)
2979 i = ada_resolve_function
2980 (candidates, n_candidates,
2982 SYMBOL_LINKAGE_NAME (exp->elts[pc + 5].symbol),
2985 error (_("Could not find a match for %s"),
2986 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
2989 exp->elts[pc + 4].block = candidates[i].block;
2990 exp->elts[pc + 5].symbol = candidates[i].sym;
2991 if (innermost_block == NULL
2992 || contained_in (candidates[i].block, innermost_block))
2993 innermost_block = candidates[i].block;
3004 case BINOP_BITWISE_AND:
3005 case BINOP_BITWISE_IOR:
3006 case BINOP_BITWISE_XOR:
3008 case BINOP_NOTEQUAL:
3016 case UNOP_LOGICAL_NOT:
3018 if (possible_user_operator_p (op, argvec))
3020 struct ada_symbol_info *candidates;
3024 ada_lookup_symbol_list (ada_encode (ada_decoded_op_name (op)),
3025 (struct block *) NULL, VAR_DOMAIN,
3027 i = ada_resolve_function (candidates, n_candidates, argvec, nargs,
3028 ada_decoded_op_name (op), NULL);
3032 replace_operator_with_call (expp, pc, nargs, 1,
3033 candidates[i].sym, candidates[i].block);
3044 return evaluate_subexp_type (exp, pos);
3047 /* Return non-zero if formal type FTYPE matches actual type ATYPE. If
3048 MAY_DEREF is non-zero, the formal may be a pointer and the actual
3049 a non-pointer. A type of 'void' (which is never a valid expression type)
3050 by convention matches anything. */
3051 /* The term "match" here is rather loose. The match is heuristic and
3052 liberal. FIXME: TOO liberal, in fact. */
3055 ada_type_match (struct type *ftype, struct type *atype, int may_deref)
3057 ftype = ada_check_typedef (ftype);
3058 atype = ada_check_typedef (atype);
3060 if (TYPE_CODE (ftype) == TYPE_CODE_REF)
3061 ftype = TYPE_TARGET_TYPE (ftype);
3062 if (TYPE_CODE (atype) == TYPE_CODE_REF)
3063 atype = TYPE_TARGET_TYPE (atype);
3065 if (TYPE_CODE (ftype) == TYPE_CODE_VOID
3066 || TYPE_CODE (atype) == TYPE_CODE_VOID)
3069 switch (TYPE_CODE (ftype))
3074 if (TYPE_CODE (atype) == TYPE_CODE_PTR)
3075 return ada_type_match (TYPE_TARGET_TYPE (ftype),
3076 TYPE_TARGET_TYPE (atype), 0);
3079 && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0));
3081 case TYPE_CODE_ENUM:
3082 case TYPE_CODE_RANGE:
3083 switch (TYPE_CODE (atype))
3086 case TYPE_CODE_ENUM:
3087 case TYPE_CODE_RANGE:
3093 case TYPE_CODE_ARRAY:
3094 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3095 || ada_is_array_descriptor_type (atype));
3097 case TYPE_CODE_STRUCT:
3098 if (ada_is_array_descriptor_type (ftype))
3099 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3100 || ada_is_array_descriptor_type (atype));
3102 return (TYPE_CODE (atype) == TYPE_CODE_STRUCT
3103 && !ada_is_array_descriptor_type (atype));
3105 case TYPE_CODE_UNION:
3107 return (TYPE_CODE (atype) == TYPE_CODE (ftype));
3111 /* Return non-zero if the formals of FUNC "sufficiently match" the
3112 vector of actual argument types ACTUALS of size N_ACTUALS. FUNC
3113 may also be an enumeral, in which case it is treated as a 0-
3114 argument function. */
3117 ada_args_match (struct symbol *func, struct value **actuals, int n_actuals)
3120 struct type *func_type = SYMBOL_TYPE (func);
3122 if (SYMBOL_CLASS (func) == LOC_CONST
3123 && TYPE_CODE (func_type) == TYPE_CODE_ENUM)
3124 return (n_actuals == 0);
3125 else if (func_type == NULL || TYPE_CODE (func_type) != TYPE_CODE_FUNC)
3128 if (TYPE_NFIELDS (func_type) != n_actuals)
3131 for (i = 0; i < n_actuals; i += 1)
3133 if (actuals[i] == NULL)
3137 struct type *ftype = ada_check_typedef (TYPE_FIELD_TYPE (func_type, i));
3138 struct type *atype = ada_check_typedef (value_type (actuals[i]));
3140 if (!ada_type_match (ftype, atype, 1))
3147 /* False iff function type FUNC_TYPE definitely does not produce a value
3148 compatible with type CONTEXT_TYPE. Conservatively returns 1 if
3149 FUNC_TYPE is not a valid function type with a non-null return type
3150 or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */
3153 return_match (struct type *func_type, struct type *context_type)
3155 struct type *return_type;
3157 if (func_type == NULL)
3160 if (TYPE_CODE (func_type) == TYPE_CODE_FUNC)
3161 return_type = base_type (TYPE_TARGET_TYPE (func_type));
3163 return_type = base_type (func_type);
3164 if (return_type == NULL)
3167 context_type = base_type (context_type);
3169 if (TYPE_CODE (return_type) == TYPE_CODE_ENUM)
3170 return context_type == NULL || return_type == context_type;
3171 else if (context_type == NULL)
3172 return TYPE_CODE (return_type) != TYPE_CODE_VOID;
3174 return TYPE_CODE (return_type) == TYPE_CODE (context_type);
3178 /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the
3179 function (if any) that matches the types of the NARGS arguments in
3180 ARGS. If CONTEXT_TYPE is non-null and there is at least one match
3181 that returns that type, then eliminate matches that don't. If
3182 CONTEXT_TYPE is void and there is at least one match that does not
3183 return void, eliminate all matches that do.
3185 Asks the user if there is more than one match remaining. Returns -1
3186 if there is no such symbol or none is selected. NAME is used
3187 solely for messages. May re-arrange and modify SYMS in
3188 the process; the index returned is for the modified vector. */
3191 ada_resolve_function (struct ada_symbol_info syms[],
3192 int nsyms, struct value **args, int nargs,
3193 const char *name, struct type *context_type)
3196 int m; /* Number of hits */
3197 struct type *fallback;
3198 struct type *return_type;
3200 return_type = context_type;
3201 if (context_type == NULL)
3202 fallback = builtin_type_void;
3209 for (k = 0; k < nsyms; k += 1)
3211 struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].sym));
3213 if (ada_args_match (syms[k].sym, args, nargs)
3214 && return_match (type, return_type))
3220 if (m > 0 || return_type == fallback)
3223 return_type = fallback;
3230 printf_filtered (_("Multiple matches for %s\n"), name);
3231 user_select_syms (syms, m, 1);
3237 /* Returns true (non-zero) iff decoded name N0 should appear before N1
3238 in a listing of choices during disambiguation (see sort_choices, below).
3239 The idea is that overloadings of a subprogram name from the
3240 same package should sort in their source order. We settle for ordering
3241 such symbols by their trailing number (__N or $N). */
3244 encoded_ordered_before (char *N0, char *N1)
3248 else if (N0 == NULL)
3253 for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1)
3255 for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1)
3257 if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000'
3258 && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000')
3262 while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_')
3265 while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_')
3267 if (n0 == n1 && strncmp (N0, N1, n0) == 0)
3268 return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1));
3270 return (strcmp (N0, N1) < 0);
3274 /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the
3278 sort_choices (struct ada_symbol_info syms[], int nsyms)
3281 for (i = 1; i < nsyms; i += 1)
3283 struct ada_symbol_info sym = syms[i];
3286 for (j = i - 1; j >= 0; j -= 1)
3288 if (encoded_ordered_before (SYMBOL_LINKAGE_NAME (syms[j].sym),
3289 SYMBOL_LINKAGE_NAME (sym.sym)))
3291 syms[j + 1] = syms[j];
3297 /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0
3298 by asking the user (if necessary), returning the number selected,
3299 and setting the first elements of SYMS items. Error if no symbols
3302 /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought
3303 to be re-integrated one of these days. */
3306 user_select_syms (struct ada_symbol_info *syms, int nsyms, int max_results)
3309 int *chosen = (int *) alloca (sizeof (int) * nsyms);
3311 int first_choice = (max_results == 1) ? 1 : 2;
3312 const char *select_mode = multiple_symbols_select_mode ();
3314 if (max_results < 1)
3315 error (_("Request to select 0 symbols!"));
3319 if (select_mode == multiple_symbols_cancel)
3321 canceled because the command is ambiguous\n\
3322 See set/show multiple-symbol."));
3324 /* If select_mode is "all", then return all possible symbols.
3325 Only do that if more than one symbol can be selected, of course.
3326 Otherwise, display the menu as usual. */
3327 if (select_mode == multiple_symbols_all && max_results > 1)
3330 printf_unfiltered (_("[0] cancel\n"));
3331 if (max_results > 1)
3332 printf_unfiltered (_("[1] all\n"));
3334 sort_choices (syms, nsyms);
3336 for (i = 0; i < nsyms; i += 1)
3338 if (syms[i].sym == NULL)
3341 if (SYMBOL_CLASS (syms[i].sym) == LOC_BLOCK)
3343 struct symtab_and_line sal =
3344 find_function_start_sal (syms[i].sym, 1);
3345 if (sal.symtab == NULL)
3346 printf_unfiltered (_("[%d] %s at <no source file available>:%d\n"),
3348 SYMBOL_PRINT_NAME (syms[i].sym),
3351 printf_unfiltered (_("[%d] %s at %s:%d\n"), i + first_choice,
3352 SYMBOL_PRINT_NAME (syms[i].sym),
3353 sal.symtab->filename, sal.line);
3359 (SYMBOL_CLASS (syms[i].sym) == LOC_CONST
3360 && SYMBOL_TYPE (syms[i].sym) != NULL
3361 && TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) == TYPE_CODE_ENUM);
3362 struct symtab *symtab = symtab_for_sym (syms[i].sym);
3364 if (SYMBOL_LINE (syms[i].sym) != 0 && symtab != NULL)
3365 printf_unfiltered (_("[%d] %s at %s:%d\n"),
3367 SYMBOL_PRINT_NAME (syms[i].sym),
3368 symtab->filename, SYMBOL_LINE (syms[i].sym));
3369 else if (is_enumeral
3370 && TYPE_NAME (SYMBOL_TYPE (syms[i].sym)) != NULL)
3372 printf_unfiltered (("[%d] "), i + first_choice);
3373 ada_print_type (SYMBOL_TYPE (syms[i].sym), NULL,
3375 printf_unfiltered (_("'(%s) (enumeral)\n"),
3376 SYMBOL_PRINT_NAME (syms[i].sym));
3378 else if (symtab != NULL)
3379 printf_unfiltered (is_enumeral
3380 ? _("[%d] %s in %s (enumeral)\n")
3381 : _("[%d] %s at %s:?\n"),
3383 SYMBOL_PRINT_NAME (syms[i].sym),
3386 printf_unfiltered (is_enumeral
3387 ? _("[%d] %s (enumeral)\n")
3388 : _("[%d] %s at ?\n"),
3390 SYMBOL_PRINT_NAME (syms[i].sym));
3394 n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1,
3397 for (i = 0; i < n_chosen; i += 1)
3398 syms[i] = syms[chosen[i]];
3403 /* Read and validate a set of numeric choices from the user in the
3404 range 0 .. N_CHOICES-1. Place the results in increasing
3405 order in CHOICES[0 .. N-1], and return N.
3407 The user types choices as a sequence of numbers on one line
3408 separated by blanks, encoding them as follows:
3410 + A choice of 0 means to cancel the selection, throwing an error.
3411 + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1.
3412 + The user chooses k by typing k+IS_ALL_CHOICE+1.
3414 The user is not allowed to choose more than MAX_RESULTS values.
3416 ANNOTATION_SUFFIX, if present, is used to annotate the input
3417 prompts (for use with the -f switch). */
3420 get_selections (int *choices, int n_choices, int max_results,
3421 int is_all_choice, char *annotation_suffix)
3426 int first_choice = is_all_choice ? 2 : 1;
3428 prompt = getenv ("PS2");
3432 args = command_line_input (prompt, 0, annotation_suffix);
3435 error_no_arg (_("one or more choice numbers"));
3439 /* Set choices[0 .. n_chosen-1] to the users' choices in ascending
3440 order, as given in args. Choices are validated. */
3446 while (isspace (*args))
3448 if (*args == '\0' && n_chosen == 0)
3449 error_no_arg (_("one or more choice numbers"));
3450 else if (*args == '\0')
3453 choice = strtol (args, &args2, 10);
3454 if (args == args2 || choice < 0
3455 || choice > n_choices + first_choice - 1)
3456 error (_("Argument must be choice number"));
3460 error (_("cancelled"));
3462 if (choice < first_choice)
3464 n_chosen = n_choices;
3465 for (j = 0; j < n_choices; j += 1)
3469 choice -= first_choice;
3471 for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1)
3475 if (j < 0 || choice != choices[j])
3478 for (k = n_chosen - 1; k > j; k -= 1)
3479 choices[k + 1] = choices[k];
3480 choices[j + 1] = choice;
3485 if (n_chosen > max_results)
3486 error (_("Select no more than %d of the above"), max_results);
3491 /* Replace the operator of length OPLEN at position PC in *EXPP with a call
3492 on the function identified by SYM and BLOCK, and taking NARGS
3493 arguments. Update *EXPP as needed to hold more space. */
3496 replace_operator_with_call (struct expression **expp, int pc, int nargs,
3497 int oplen, struct symbol *sym,
3498 struct block *block)
3500 /* A new expression, with 6 more elements (3 for funcall, 4 for function
3501 symbol, -oplen for operator being replaced). */
3502 struct expression *newexp = (struct expression *)
3503 xmalloc (sizeof (struct expression)
3504 + EXP_ELEM_TO_BYTES ((*expp)->nelts + 7 - oplen));
3505 struct expression *exp = *expp;
3507 newexp->nelts = exp->nelts + 7 - oplen;
3508 newexp->language_defn = exp->language_defn;
3509 memcpy (newexp->elts, exp->elts, EXP_ELEM_TO_BYTES (pc));
3510 memcpy (newexp->elts + pc + 7, exp->elts + pc + oplen,
3511 EXP_ELEM_TO_BYTES (exp->nelts - pc - oplen));
3513 newexp->elts[pc].opcode = newexp->elts[pc + 2].opcode = OP_FUNCALL;
3514 newexp->elts[pc + 1].longconst = (LONGEST) nargs;
3516 newexp->elts[pc + 3].opcode = newexp->elts[pc + 6].opcode = OP_VAR_VALUE;
3517 newexp->elts[pc + 4].block = block;
3518 newexp->elts[pc + 5].symbol = sym;
3524 /* Type-class predicates */
3526 /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type),
3530 numeric_type_p (struct type *type)
3536 switch (TYPE_CODE (type))
3541 case TYPE_CODE_RANGE:
3542 return (type == TYPE_TARGET_TYPE (type)
3543 || numeric_type_p (TYPE_TARGET_TYPE (type)));
3550 /* True iff TYPE is integral (an INT or RANGE of INTs). */
3553 integer_type_p (struct type *type)
3559 switch (TYPE_CODE (type))
3563 case TYPE_CODE_RANGE:
3564 return (type == TYPE_TARGET_TYPE (type)
3565 || integer_type_p (TYPE_TARGET_TYPE (type)));
3572 /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */
3575 scalar_type_p (struct type *type)
3581 switch (TYPE_CODE (type))
3584 case TYPE_CODE_RANGE:
3585 case TYPE_CODE_ENUM:
3594 /* True iff TYPE is discrete (INT, RANGE, ENUM). */
3597 discrete_type_p (struct type *type)
3603 switch (TYPE_CODE (type))
3606 case TYPE_CODE_RANGE:
3607 case TYPE_CODE_ENUM:
3615 /* Returns non-zero if OP with operands in the vector ARGS could be
3616 a user-defined function. Errs on the side of pre-defined operators
3617 (i.e., result 0). */
3620 possible_user_operator_p (enum exp_opcode op, struct value *args[])
3622 struct type *type0 =
3623 (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0]));
3624 struct type *type1 =
3625 (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1]));
3639 return (!(numeric_type_p (type0) && numeric_type_p (type1)));
3643 case BINOP_BITWISE_AND:
3644 case BINOP_BITWISE_IOR:
3645 case BINOP_BITWISE_XOR:
3646 return (!(integer_type_p (type0) && integer_type_p (type1)));
3649 case BINOP_NOTEQUAL:
3654 return (!(scalar_type_p (type0) && scalar_type_p (type1)));
3657 return !ada_is_array_type (type0) || !ada_is_array_type (type1);
3660 return (!(numeric_type_p (type0) && integer_type_p (type1)));
3664 case UNOP_LOGICAL_NOT:
3666 return (!numeric_type_p (type0));
3675 1. In the following, we assume that a renaming type's name may
3676 have an ___XD suffix. It would be nice if this went away at some
3678 2. We handle both the (old) purely type-based representation of
3679 renamings and the (new) variable-based encoding. At some point,
3680 it is devoutly to be hoped that the former goes away
3681 (FIXME: hilfinger-2007-07-09).
3682 3. Subprogram renamings are not implemented, although the XRS
3683 suffix is recognized (FIXME: hilfinger-2007-07-09). */
3685 /* If SYM encodes a renaming,
3687 <renaming> renames <renamed entity>,
3689 sets *LEN to the length of the renamed entity's name,
3690 *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to
3691 the string describing the subcomponent selected from the renamed
3692 entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming
3693 (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR
3694 are undefined). Otherwise, returns a value indicating the category
3695 of entity renamed: an object (ADA_OBJECT_RENAMING), exception
3696 (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or
3697 subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the
3698 strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be
3699 deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR
3700 may be NULL, in which case they are not assigned.
3702 [Currently, however, GCC does not generate subprogram renamings.] */
3704 enum ada_renaming_category
3705 ada_parse_renaming (struct symbol *sym,
3706 const char **renamed_entity, int *len,
3707 const char **renaming_expr)
3709 enum ada_renaming_category kind;
3714 return ADA_NOT_RENAMING;
3715 switch (SYMBOL_CLASS (sym))
3718 return ADA_NOT_RENAMING;
3720 return parse_old_style_renaming (SYMBOL_TYPE (sym),
3721 renamed_entity, len, renaming_expr);
3725 case LOC_OPTIMIZED_OUT:
3726 info = strstr (SYMBOL_LINKAGE_NAME (sym), "___XR");
3728 return ADA_NOT_RENAMING;
3732 kind = ADA_OBJECT_RENAMING;
3736 kind = ADA_EXCEPTION_RENAMING;
3740 kind = ADA_PACKAGE_RENAMING;
3744 kind = ADA_SUBPROGRAM_RENAMING;
3748 return ADA_NOT_RENAMING;
3752 if (renamed_entity != NULL)
3753 *renamed_entity = info;
3754 suffix = strstr (info, "___XE");
3755 if (suffix == NULL || suffix == info)
3756 return ADA_NOT_RENAMING;
3758 *len = strlen (info) - strlen (suffix);
3760 if (renaming_expr != NULL)
3761 *renaming_expr = suffix;
3765 /* Assuming TYPE encodes a renaming according to the old encoding in
3766 exp_dbug.ads, returns details of that renaming in *RENAMED_ENTITY,
3767 *LEN, and *RENAMING_EXPR, as for ada_parse_renaming, above. Returns
3768 ADA_NOT_RENAMING otherwise. */
3769 static enum ada_renaming_category
3770 parse_old_style_renaming (struct type *type,
3771 const char **renamed_entity, int *len,
3772 const char **renaming_expr)
3774 enum ada_renaming_category kind;
3779 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
3780 || TYPE_NFIELDS (type) != 1)
3781 return ADA_NOT_RENAMING;
3783 name = type_name_no_tag (type);
3785 return ADA_NOT_RENAMING;
3787 name = strstr (name, "___XR");
3789 return ADA_NOT_RENAMING;
3794 kind = ADA_OBJECT_RENAMING;
3797 kind = ADA_EXCEPTION_RENAMING;
3800 kind = ADA_PACKAGE_RENAMING;
3803 kind = ADA_SUBPROGRAM_RENAMING;
3806 return ADA_NOT_RENAMING;
3809 info = TYPE_FIELD_NAME (type, 0);
3811 return ADA_NOT_RENAMING;
3812 if (renamed_entity != NULL)
3813 *renamed_entity = info;
3814 suffix = strstr (info, "___XE");
3815 if (renaming_expr != NULL)
3816 *renaming_expr = suffix + 5;
3817 if (suffix == NULL || suffix == info)
3818 return ADA_NOT_RENAMING;
3820 *len = suffix - info;
3826 /* Evaluation: Function Calls */
3828 /* Return an lvalue containing the value VAL. This is the identity on
3829 lvalues, and otherwise has the side-effect of pushing a copy of VAL
3830 on the stack, using and updating *SP as the stack pointer, and
3831 returning an lvalue whose VALUE_ADDRESS points to the copy. */
3833 static struct value *
3834 ensure_lval (struct value *val, CORE_ADDR *sp)
3836 if (! VALUE_LVAL (val))
3838 int len = TYPE_LENGTH (ada_check_typedef (value_type (val)));
3840 /* The following is taken from the structure-return code in
3841 call_function_by_hand. FIXME: Therefore, some refactoring seems
3843 if (gdbarch_inner_than (current_gdbarch, 1, 2))
3845 /* Stack grows downward. Align SP and VALUE_ADDRESS (val) after
3846 reserving sufficient space. */
3848 if (gdbarch_frame_align_p (current_gdbarch))
3849 *sp = gdbarch_frame_align (current_gdbarch, *sp);
3850 VALUE_ADDRESS (val) = *sp;
3854 /* Stack grows upward. Align the frame, allocate space, and
3855 then again, re-align the frame. */
3856 if (gdbarch_frame_align_p (current_gdbarch))
3857 *sp = gdbarch_frame_align (current_gdbarch, *sp);
3858 VALUE_ADDRESS (val) = *sp;
3860 if (gdbarch_frame_align_p (current_gdbarch))
3861 *sp = gdbarch_frame_align (current_gdbarch, *sp);
3863 VALUE_LVAL (val) = lval_memory;
3865 write_memory (VALUE_ADDRESS (val), value_contents_raw (val), len);
3871 /* Return the value ACTUAL, converted to be an appropriate value for a
3872 formal of type FORMAL_TYPE. Use *SP as a stack pointer for
3873 allocating any necessary descriptors (fat pointers), or copies of
3874 values not residing in memory, updating it as needed. */
3877 ada_convert_actual (struct value *actual, struct type *formal_type0,
3880 struct type *actual_type = ada_check_typedef (value_type (actual));
3881 struct type *formal_type = ada_check_typedef (formal_type0);
3882 struct type *formal_target =
3883 TYPE_CODE (formal_type) == TYPE_CODE_PTR
3884 ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type;
3885 struct type *actual_target =
3886 TYPE_CODE (actual_type) == TYPE_CODE_PTR
3887 ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type;
3889 if (ada_is_array_descriptor_type (formal_target)
3890 && TYPE_CODE (actual_target) == TYPE_CODE_ARRAY)
3891 return make_array_descriptor (formal_type, actual, sp);
3892 else if (TYPE_CODE (formal_type) == TYPE_CODE_PTR
3893 || TYPE_CODE (formal_type) == TYPE_CODE_REF)
3895 struct value *result;
3896 if (TYPE_CODE (formal_target) == TYPE_CODE_ARRAY
3897 && ada_is_array_descriptor_type (actual_target))
3898 result = desc_data (actual);
3899 else if (TYPE_CODE (actual_type) != TYPE_CODE_PTR)
3901 if (VALUE_LVAL (actual) != lval_memory)
3904 actual_type = ada_check_typedef (value_type (actual));
3905 val = allocate_value (actual_type);
3906 memcpy ((char *) value_contents_raw (val),
3907 (char *) value_contents (actual),
3908 TYPE_LENGTH (actual_type));
3909 actual = ensure_lval (val, sp);
3911 result = value_addr (actual);
3915 return value_cast_pointers (formal_type, result);
3917 else if (TYPE_CODE (actual_type) == TYPE_CODE_PTR)
3918 return ada_value_ind (actual);
3924 /* Push a descriptor of type TYPE for array value ARR on the stack at
3925 *SP, updating *SP to reflect the new descriptor. Return either
3926 an lvalue representing the new descriptor, or (if TYPE is a pointer-
3927 to-descriptor type rather than a descriptor type), a struct value *
3928 representing a pointer to this descriptor. */
3930 static struct value *
3931 make_array_descriptor (struct type *type, struct value *arr, CORE_ADDR *sp)
3933 struct type *bounds_type = desc_bounds_type (type);
3934 struct type *desc_type = desc_base_type (type);
3935 struct value *descriptor = allocate_value (desc_type);
3936 struct value *bounds = allocate_value (bounds_type);
3939 for (i = ada_array_arity (ada_check_typedef (value_type (arr))); i > 0; i -= 1)
3941 modify_general_field (value_contents_writeable (bounds),
3942 value_as_long (ada_array_bound (arr, i, 0)),
3943 desc_bound_bitpos (bounds_type, i, 0),
3944 desc_bound_bitsize (bounds_type, i, 0));
3945 modify_general_field (value_contents_writeable (bounds),
3946 value_as_long (ada_array_bound (arr, i, 1)),
3947 desc_bound_bitpos (bounds_type, i, 1),
3948 desc_bound_bitsize (bounds_type, i, 1));
3951 bounds = ensure_lval (bounds, sp);
3953 modify_general_field (value_contents_writeable (descriptor),
3954 VALUE_ADDRESS (ensure_lval (arr, sp)),
3955 fat_pntr_data_bitpos (desc_type),
3956 fat_pntr_data_bitsize (desc_type));
3958 modify_general_field (value_contents_writeable (descriptor),
3959 VALUE_ADDRESS (bounds),
3960 fat_pntr_bounds_bitpos (desc_type),
3961 fat_pntr_bounds_bitsize (desc_type));
3963 descriptor = ensure_lval (descriptor, sp);
3965 if (TYPE_CODE (type) == TYPE_CODE_PTR)
3966 return value_addr (descriptor);
3971 /* Dummy definitions for an experimental caching module that is not
3972 * used in the public sources. */
3975 lookup_cached_symbol (const char *name, domain_enum namespace,
3976 struct symbol **sym, struct block **block)
3982 cache_symbol (const char *name, domain_enum namespace, struct symbol *sym,
3983 struct block *block)
3989 /* Return the result of a standard (literal, C-like) lookup of NAME in
3990 given DOMAIN, visible from lexical block BLOCK. */
3992 static struct symbol *
3993 standard_lookup (const char *name, const struct block *block,
3998 if (lookup_cached_symbol (name, domain, &sym, NULL))
4000 sym = lookup_symbol_in_language (name, block, domain, language_c, 0);
4001 cache_symbol (name, domain, sym, block_found);
4006 /* Non-zero iff there is at least one non-function/non-enumeral symbol
4007 in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions,
4008 since they contend in overloading in the same way. */
4010 is_nonfunction (struct ada_symbol_info syms[], int n)
4014 for (i = 0; i < n; i += 1)
4015 if (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_FUNC
4016 && (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_ENUM
4017 || SYMBOL_CLASS (syms[i].sym) != LOC_CONST))
4023 /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent
4024 struct types. Otherwise, they may not. */
4027 equiv_types (struct type *type0, struct type *type1)
4031 if (type0 == NULL || type1 == NULL
4032 || TYPE_CODE (type0) != TYPE_CODE (type1))
4034 if ((TYPE_CODE (type0) == TYPE_CODE_STRUCT
4035 || TYPE_CODE (type0) == TYPE_CODE_ENUM)
4036 && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL
4037 && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0)
4043 /* True iff SYM0 represents the same entity as SYM1, or one that is
4044 no more defined than that of SYM1. */
4047 lesseq_defined_than (struct symbol *sym0, struct symbol *sym1)
4051 if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1)
4052 || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1))
4055 switch (SYMBOL_CLASS (sym0))
4061 struct type *type0 = SYMBOL_TYPE (sym0);
4062 struct type *type1 = SYMBOL_TYPE (sym1);
4063 char *name0 = SYMBOL_LINKAGE_NAME (sym0);
4064 char *name1 = SYMBOL_LINKAGE_NAME (sym1);
4065 int len0 = strlen (name0);
4067 TYPE_CODE (type0) == TYPE_CODE (type1)
4068 && (equiv_types (type0, type1)
4069 || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0
4070 && strncmp (name1 + len0, "___XV", 5) == 0));
4073 return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1)
4074 && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1));
4080 /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct ada_symbol_info
4081 records in OBSTACKP. Do nothing if SYM is a duplicate. */
4084 add_defn_to_vec (struct obstack *obstackp,
4086 struct block *block)
4090 struct ada_symbol_info *prevDefns = defns_collected (obstackp, 0);
4092 /* Do not try to complete stub types, as the debugger is probably
4093 already scanning all symbols matching a certain name at the
4094 time when this function is called. Trying to replace the stub
4095 type by its associated full type will cause us to restart a scan
4096 which may lead to an infinite recursion. Instead, the client
4097 collecting the matching symbols will end up collecting several
4098 matches, with at least one of them complete. It can then filter
4099 out the stub ones if needed. */
4101 for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1)
4103 if (lesseq_defined_than (sym, prevDefns[i].sym))
4105 else if (lesseq_defined_than (prevDefns[i].sym, sym))
4107 prevDefns[i].sym = sym;
4108 prevDefns[i].block = block;
4114 struct ada_symbol_info info;
4118 obstack_grow (obstackp, &info, sizeof (struct ada_symbol_info));
4122 /* Number of ada_symbol_info structures currently collected in
4123 current vector in *OBSTACKP. */
4126 num_defns_collected (struct obstack *obstackp)
4128 return obstack_object_size (obstackp) / sizeof (struct ada_symbol_info);
4131 /* Vector of ada_symbol_info structures currently collected in current
4132 vector in *OBSTACKP. If FINISH, close off the vector and return
4133 its final address. */
4135 static struct ada_symbol_info *
4136 defns_collected (struct obstack *obstackp, int finish)
4139 return obstack_finish (obstackp);
4141 return (struct ada_symbol_info *) obstack_base (obstackp);
4144 /* Look, in partial_symtab PST, for symbol NAME in given namespace.
4145 Check the global symbols if GLOBAL, the static symbols if not.
4146 Do wild-card match if WILD. */
4148 static struct partial_symbol *
4149 ada_lookup_partial_symbol (struct partial_symtab *pst, const char *name,
4150 int global, domain_enum namespace, int wild)
4152 struct partial_symbol **start;
4153 int name_len = strlen (name);
4154 int length = (global ? pst->n_global_syms : pst->n_static_syms);
4163 pst->objfile->global_psymbols.list + pst->globals_offset :
4164 pst->objfile->static_psymbols.list + pst->statics_offset);
4168 for (i = 0; i < length; i += 1)
4170 struct partial_symbol *psym = start[i];
4172 if (symbol_matches_domain (SYMBOL_LANGUAGE (psym),
4173 SYMBOL_DOMAIN (psym), namespace)
4174 && wild_match (name, name_len, SYMBOL_LINKAGE_NAME (psym)))
4188 int M = (U + i) >> 1;
4189 struct partial_symbol *psym = start[M];
4190 if (SYMBOL_LINKAGE_NAME (psym)[0] < name[0])
4192 else if (SYMBOL_LINKAGE_NAME (psym)[0] > name[0])
4194 else if (strcmp (SYMBOL_LINKAGE_NAME (psym), name) < 0)
4205 struct partial_symbol *psym = start[i];
4207 if (symbol_matches_domain (SYMBOL_LANGUAGE (psym),
4208 SYMBOL_DOMAIN (psym), namespace))
4210 int cmp = strncmp (name, SYMBOL_LINKAGE_NAME (psym), name_len);
4218 && is_name_suffix (SYMBOL_LINKAGE_NAME (psym)
4232 int M = (U + i) >> 1;
4233 struct partial_symbol *psym = start[M];
4234 if (SYMBOL_LINKAGE_NAME (psym)[0] < '_')
4236 else if (SYMBOL_LINKAGE_NAME (psym)[0] > '_')
4238 else if (strcmp (SYMBOL_LINKAGE_NAME (psym), "_ada_") < 0)
4249 struct partial_symbol *psym = start[i];
4251 if (symbol_matches_domain (SYMBOL_LANGUAGE (psym),
4252 SYMBOL_DOMAIN (psym), namespace))
4256 cmp = (int) '_' - (int) SYMBOL_LINKAGE_NAME (psym)[0];
4259 cmp = strncmp ("_ada_", SYMBOL_LINKAGE_NAME (psym), 5);
4261 cmp = strncmp (name, SYMBOL_LINKAGE_NAME (psym) + 5,
4271 && is_name_suffix (SYMBOL_LINKAGE_NAME (psym)
4281 /* Find a symbol table containing symbol SYM or NULL if none. */
4283 static struct symtab *
4284 symtab_for_sym (struct symbol *sym)
4287 struct objfile *objfile;
4289 struct symbol *tmp_sym;
4290 struct dict_iterator iter;
4293 ALL_PRIMARY_SYMTABS (objfile, s)
4295 switch (SYMBOL_CLASS (sym))
4303 case LOC_CONST_BYTES:
4304 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4305 ALL_BLOCK_SYMBOLS (b, iter, tmp_sym) if (sym == tmp_sym)
4307 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4308 ALL_BLOCK_SYMBOLS (b, iter, tmp_sym) if (sym == tmp_sym)
4314 switch (SYMBOL_CLASS (sym))
4319 case LOC_REGPARM_ADDR:
4323 for (j = FIRST_LOCAL_BLOCK;
4324 j < BLOCKVECTOR_NBLOCKS (BLOCKVECTOR (s)); j += 1)
4326 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), j);
4327 ALL_BLOCK_SYMBOLS (b, iter, tmp_sym) if (sym == tmp_sym)
4338 /* Return a minimal symbol matching NAME according to Ada decoding
4339 rules. Returns NULL if there is no such minimal symbol. Names
4340 prefixed with "standard__" are handled specially: "standard__" is
4341 first stripped off, and only static and global symbols are searched. */
4343 struct minimal_symbol *
4344 ada_lookup_simple_minsym (const char *name)
4346 struct objfile *objfile;
4347 struct minimal_symbol *msymbol;
4350 if (strncmp (name, "standard__", sizeof ("standard__") - 1) == 0)
4352 name += sizeof ("standard__") - 1;
4356 wild_match = (strstr (name, "__") == NULL);
4358 ALL_MSYMBOLS (objfile, msymbol)
4360 if (ada_match_name (SYMBOL_LINKAGE_NAME (msymbol), name, wild_match)
4361 && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline)
4368 /* For all subprograms that statically enclose the subprogram of the
4369 selected frame, add symbols matching identifier NAME in DOMAIN
4370 and their blocks to the list of data in OBSTACKP, as for
4371 ada_add_block_symbols (q.v.). If WILD, treat as NAME with a
4375 add_symbols_from_enclosing_procs (struct obstack *obstackp,
4376 const char *name, domain_enum namespace,
4381 /* True if TYPE is definitely an artificial type supplied to a symbol
4382 for which no debugging information was given in the symbol file. */
4385 is_nondebugging_type (struct type *type)
4387 char *name = ada_type_name (type);
4388 return (name != NULL && strcmp (name, "<variable, no debug info>") == 0);
4391 /* Remove any non-debugging symbols in SYMS[0 .. NSYMS-1] that definitely
4392 duplicate other symbols in the list (The only case I know of where
4393 this happens is when object files containing stabs-in-ecoff are
4394 linked with files containing ordinary ecoff debugging symbols (or no
4395 debugging symbols)). Modifies SYMS to squeeze out deleted entries.
4396 Returns the number of items in the modified list. */
4399 remove_extra_symbols (struct ada_symbol_info *syms, int nsyms)
4406 if (SYMBOL_LINKAGE_NAME (syms[i].sym) != NULL
4407 && SYMBOL_CLASS (syms[i].sym) == LOC_STATIC
4408 && is_nondebugging_type (SYMBOL_TYPE (syms[i].sym)))
4410 for (j = 0; j < nsyms; j += 1)
4413 && SYMBOL_LINKAGE_NAME (syms[j].sym) != NULL
4414 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].sym),
4415 SYMBOL_LINKAGE_NAME (syms[j].sym)) == 0
4416 && SYMBOL_CLASS (syms[i].sym) == SYMBOL_CLASS (syms[j].sym)
4417 && SYMBOL_VALUE_ADDRESS (syms[i].sym)
4418 == SYMBOL_VALUE_ADDRESS (syms[j].sym))
4421 for (k = i + 1; k < nsyms; k += 1)
4422 syms[k - 1] = syms[k];
4435 /* Given a type that corresponds to a renaming entity, use the type name
4436 to extract the scope (package name or function name, fully qualified,
4437 and following the GNAT encoding convention) where this renaming has been
4438 defined. The string returned needs to be deallocated after use. */
4441 xget_renaming_scope (struct type *renaming_type)
4443 /* The renaming types adhere to the following convention:
4444 <scope>__<rename>___<XR extension>.
4445 So, to extract the scope, we search for the "___XR" extension,
4446 and then backtrack until we find the first "__". */
4448 const char *name = type_name_no_tag (renaming_type);
4449 char *suffix = strstr (name, "___XR");
4454 /* Now, backtrack a bit until we find the first "__". Start looking
4455 at suffix - 3, as the <rename> part is at least one character long. */
4457 for (last = suffix - 3; last > name; last--)
4458 if (last[0] == '_' && last[1] == '_')
4461 /* Make a copy of scope and return it. */
4463 scope_len = last - name;
4464 scope = (char *) xmalloc ((scope_len + 1) * sizeof (char));
4466 strncpy (scope, name, scope_len);
4467 scope[scope_len] = '\0';
4472 /* Return nonzero if NAME corresponds to a package name. */
4475 is_package_name (const char *name)
4477 /* Here, We take advantage of the fact that no symbols are generated
4478 for packages, while symbols are generated for each function.
4479 So the condition for NAME represent a package becomes equivalent
4480 to NAME not existing in our list of symbols. There is only one
4481 small complication with library-level functions (see below). */
4485 /* If it is a function that has not been defined at library level,
4486 then we should be able to look it up in the symbols. */
4487 if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL)
4490 /* Library-level function names start with "_ada_". See if function
4491 "_ada_" followed by NAME can be found. */
4493 /* Do a quick check that NAME does not contain "__", since library-level
4494 functions names cannot contain "__" in them. */
4495 if (strstr (name, "__") != NULL)
4498 fun_name = xstrprintf ("_ada_%s", name);
4500 return (standard_lookup (fun_name, NULL, VAR_DOMAIN) == NULL);
4503 /* Return nonzero if SYM corresponds to a renaming entity that is
4504 not visible from FUNCTION_NAME. */
4507 old_renaming_is_invisible (const struct symbol *sym, char *function_name)
4511 if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
4514 scope = xget_renaming_scope (SYMBOL_TYPE (sym));
4516 make_cleanup (xfree, scope);
4518 /* If the rename has been defined in a package, then it is visible. */
4519 if (is_package_name (scope))
4522 /* Check that the rename is in the current function scope by checking
4523 that its name starts with SCOPE. */
4525 /* If the function name starts with "_ada_", it means that it is
4526 a library-level function. Strip this prefix before doing the
4527 comparison, as the encoding for the renaming does not contain
4529 if (strncmp (function_name, "_ada_", 5) == 0)
4532 return (strncmp (function_name, scope, strlen (scope)) != 0);
4535 /* Remove entries from SYMS that corresponds to a renaming entity that
4536 is not visible from the function associated with CURRENT_BLOCK or
4537 that is superfluous due to the presence of more specific renaming
4538 information. Places surviving symbols in the initial entries of
4539 SYMS and returns the number of surviving symbols.
4542 First, in cases where an object renaming is implemented as a
4543 reference variable, GNAT may produce both the actual reference
4544 variable and the renaming encoding. In this case, we discard the
4547 Second, GNAT emits a type following a specified encoding for each renaming
4548 entity. Unfortunately, STABS currently does not support the definition
4549 of types that are local to a given lexical block, so all renamings types
4550 are emitted at library level. As a consequence, if an application
4551 contains two renaming entities using the same name, and a user tries to
4552 print the value of one of these entities, the result of the ada symbol
4553 lookup will also contain the wrong renaming type.
4555 This function partially covers for this limitation by attempting to
4556 remove from the SYMS list renaming symbols that should be visible
4557 from CURRENT_BLOCK. However, there does not seem be a 100% reliable
4558 method with the current information available. The implementation
4559 below has a couple of limitations (FIXME: brobecker-2003-05-12):
4561 - When the user tries to print a rename in a function while there
4562 is another rename entity defined in a package: Normally, the
4563 rename in the function has precedence over the rename in the
4564 package, so the latter should be removed from the list. This is
4565 currently not the case.
4567 - This function will incorrectly remove valid renames if
4568 the CURRENT_BLOCK corresponds to a function which symbol name
4569 has been changed by an "Export" pragma. As a consequence,
4570 the user will be unable to print such rename entities. */
4573 remove_irrelevant_renamings (struct ada_symbol_info *syms,
4574 int nsyms, const struct block *current_block)
4576 struct symbol *current_function;
4577 char *current_function_name;
4579 int is_new_style_renaming;
4581 /* If there is both a renaming foo___XR... encoded as a variable and
4582 a simple variable foo in the same block, discard the latter.
4583 First, zero out such symbols, then compress. */
4584 is_new_style_renaming = 0;
4585 for (i = 0; i < nsyms; i += 1)
4587 struct symbol *sym = syms[i].sym;
4588 struct block *block = syms[i].block;
4592 if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4594 name = SYMBOL_LINKAGE_NAME (sym);
4595 suffix = strstr (name, "___XR");
4599 int name_len = suffix - name;
4601 is_new_style_renaming = 1;
4602 for (j = 0; j < nsyms; j += 1)
4603 if (i != j && syms[j].sym != NULL
4604 && strncmp (name, SYMBOL_LINKAGE_NAME (syms[j].sym),
4606 && block == syms[j].block)
4610 if (is_new_style_renaming)
4614 for (j = k = 0; j < nsyms; j += 1)
4615 if (syms[j].sym != NULL)
4623 /* Extract the function name associated to CURRENT_BLOCK.
4624 Abort if unable to do so. */
4626 if (current_block == NULL)
4629 current_function = block_linkage_function (current_block);
4630 if (current_function == NULL)
4633 current_function_name = SYMBOL_LINKAGE_NAME (current_function);
4634 if (current_function_name == NULL)
4637 /* Check each of the symbols, and remove it from the list if it is
4638 a type corresponding to a renaming that is out of the scope of
4639 the current block. */
4644 if (ada_parse_renaming (syms[i].sym, NULL, NULL, NULL)
4645 == ADA_OBJECT_RENAMING
4646 && old_renaming_is_invisible (syms[i].sym, current_function_name))
4649 for (j = i + 1; j < nsyms; j += 1)
4650 syms[j - 1] = syms[j];
4660 /* Find symbols in DOMAIN matching NAME0, in BLOCK0 and enclosing
4661 scope and in global scopes, returning the number of matches. Sets
4662 *RESULTS to point to a vector of (SYM,BLOCK) tuples,
4663 indicating the symbols found and the blocks and symbol tables (if
4664 any) in which they were found. This vector are transient---good only to
4665 the next call of ada_lookup_symbol_list. Any non-function/non-enumeral
4666 symbol match within the nest of blocks whose innermost member is BLOCK0,
4667 is the one match returned (no other matches in that or
4668 enclosing blocks is returned). If there are any matches in or
4669 surrounding BLOCK0, then these alone are returned. Otherwise, the
4670 search extends to global and file-scope (static) symbol tables.
4671 Names prefixed with "standard__" are handled specially: "standard__"
4672 is first stripped off, and only static and global symbols are searched. */
4675 ada_lookup_symbol_list (const char *name0, const struct block *block0,
4676 domain_enum namespace,
4677 struct ada_symbol_info **results)
4681 struct partial_symtab *ps;
4682 struct blockvector *bv;
4683 struct objfile *objfile;
4684 struct block *block;
4686 struct minimal_symbol *msymbol;
4692 obstack_free (&symbol_list_obstack, NULL);
4693 obstack_init (&symbol_list_obstack);
4697 /* Search specified block and its superiors. */
4699 wild_match = (strstr (name0, "__") == NULL);
4701 block = (struct block *) block0; /* FIXME: No cast ought to be
4702 needed, but adding const will
4703 have a cascade effect. */
4704 if (strncmp (name0, "standard__", sizeof ("standard__") - 1) == 0)
4708 name = name0 + sizeof ("standard__") - 1;
4712 while (block != NULL)
4715 ada_add_block_symbols (&symbol_list_obstack, block, name,
4716 namespace, NULL, wild_match);
4718 /* If we found a non-function match, assume that's the one. */
4719 if (is_nonfunction (defns_collected (&symbol_list_obstack, 0),
4720 num_defns_collected (&symbol_list_obstack)))
4723 block = BLOCK_SUPERBLOCK (block);
4726 /* If no luck so far, try to find NAME as a local symbol in some lexically
4727 enclosing subprogram. */
4728 if (num_defns_collected (&symbol_list_obstack) == 0 && block_depth > 2)
4729 add_symbols_from_enclosing_procs (&symbol_list_obstack,
4730 name, namespace, wild_match);
4732 /* If we found ANY matches among non-global symbols, we're done. */
4734 if (num_defns_collected (&symbol_list_obstack) > 0)
4738 if (lookup_cached_symbol (name0, namespace, &sym, &block))
4741 add_defn_to_vec (&symbol_list_obstack, sym, block);
4745 /* Now add symbols from all global blocks: symbol tables, minimal symbol
4746 tables, and psymtab's. */
4748 ALL_PRIMARY_SYMTABS (objfile, s)
4751 bv = BLOCKVECTOR (s);
4752 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
4753 ada_add_block_symbols (&symbol_list_obstack, block, name, namespace,
4754 objfile, wild_match);
4757 if (namespace == VAR_DOMAIN)
4759 ALL_MSYMBOLS (objfile, msymbol)
4761 if (ada_match_name (SYMBOL_LINKAGE_NAME (msymbol), name, wild_match))
4763 switch (MSYMBOL_TYPE (msymbol))
4765 case mst_solib_trampoline:
4768 s = find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol));
4771 int ndefns0 = num_defns_collected (&symbol_list_obstack);
4773 bv = BLOCKVECTOR (s);
4774 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
4775 ada_add_block_symbols (&symbol_list_obstack, block,
4776 SYMBOL_LINKAGE_NAME (msymbol),
4777 namespace, objfile, wild_match);
4779 if (num_defns_collected (&symbol_list_obstack) == ndefns0)
4781 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
4782 ada_add_block_symbols (&symbol_list_obstack, block,
4783 SYMBOL_LINKAGE_NAME (msymbol),
4793 ALL_PSYMTABS (objfile, ps)
4797 && ada_lookup_partial_symbol (ps, name, 1, namespace, wild_match))
4799 s = PSYMTAB_TO_SYMTAB (ps);
4802 bv = BLOCKVECTOR (s);
4803 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
4804 ada_add_block_symbols (&symbol_list_obstack, block, name,
4805 namespace, objfile, wild_match);
4809 /* Now add symbols from all per-file blocks if we've gotten no hits
4810 (Not strictly correct, but perhaps better than an error).
4811 Do the symtabs first, then check the psymtabs. */
4813 if (num_defns_collected (&symbol_list_obstack) == 0)
4816 ALL_PRIMARY_SYMTABS (objfile, s)
4819 bv = BLOCKVECTOR (s);
4820 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
4821 ada_add_block_symbols (&symbol_list_obstack, block, name, namespace,
4822 objfile, wild_match);
4825 ALL_PSYMTABS (objfile, ps)
4829 && ada_lookup_partial_symbol (ps, name, 0, namespace, wild_match))
4831 s = PSYMTAB_TO_SYMTAB (ps);
4832 bv = BLOCKVECTOR (s);
4835 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
4836 ada_add_block_symbols (&symbol_list_obstack, block, name,
4837 namespace, objfile, wild_match);
4843 ndefns = num_defns_collected (&symbol_list_obstack);
4844 *results = defns_collected (&symbol_list_obstack, 1);
4846 ndefns = remove_extra_symbols (*results, ndefns);
4849 cache_symbol (name0, namespace, NULL, NULL);
4851 if (ndefns == 1 && cacheIfUnique)
4852 cache_symbol (name0, namespace, (*results)[0].sym, (*results)[0].block);
4854 ndefns = remove_irrelevant_renamings (*results, ndefns, block0);
4860 ada_lookup_encoded_symbol (const char *name, const struct block *block0,
4861 domain_enum namespace, struct block **block_found)
4863 struct ada_symbol_info *candidates;
4866 n_candidates = ada_lookup_symbol_list (name, block0, namespace, &candidates);
4868 if (n_candidates == 0)
4871 if (block_found != NULL)
4872 *block_found = candidates[0].block;
4874 return fixup_symbol_section (candidates[0].sym, NULL);
4877 /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing
4878 scope and in global scopes, or NULL if none. NAME is folded and
4879 encoded first. Otherwise, the result is as for ada_lookup_symbol_list,
4880 choosing the first symbol if there are multiple choices.
4881 *IS_A_FIELD_OF_THIS is set to 0 and *SYMTAB is set to the symbol
4882 table in which the symbol was found (in both cases, these
4883 assignments occur only if the pointers are non-null). */
4885 ada_lookup_symbol (const char *name, const struct block *block0,
4886 domain_enum namespace, int *is_a_field_of_this)
4888 if (is_a_field_of_this != NULL)
4889 *is_a_field_of_this = 0;
4892 ada_lookup_encoded_symbol (ada_encode (ada_fold_name (name)),
4893 block0, namespace, NULL);
4896 static struct symbol *
4897 ada_lookup_symbol_nonlocal (const char *name,
4898 const char *linkage_name,
4899 const struct block *block,
4900 const domain_enum domain)
4902 if (linkage_name == NULL)
4903 linkage_name = name;
4904 return ada_lookup_symbol (linkage_name, block_static_block (block), domain,
4909 /* True iff STR is a possible encoded suffix of a normal Ada name
4910 that is to be ignored for matching purposes. Suffixes of parallel
4911 names (e.g., XVE) are not included here. Currently, the possible suffixes
4912 are given by either of the regular expression:
4914 [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux]
4915 ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX]
4916 _E[0-9]+[bs]$ [protected object entry suffixes]
4917 (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$
4919 Also, any leading "__[0-9]+" sequence is skipped before the suffix
4920 match is performed. This sequence is used to differentiate homonyms,
4921 is an optional part of a valid name suffix. */
4924 is_name_suffix (const char *str)
4927 const char *matching;
4928 const int len = strlen (str);
4930 /* Skip optional leading __[0-9]+. */
4932 if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2]))
4935 while (isdigit (str[0]))
4941 if (str[0] == '.' || str[0] == '$')
4944 while (isdigit (matching[0]))
4946 if (matching[0] == '\0')
4952 if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_')
4955 while (isdigit (matching[0]))
4957 if (matching[0] == '\0')
4962 /* FIXME: brobecker/2005-09-23: Protected Object subprograms end
4963 with a N at the end. Unfortunately, the compiler uses the same
4964 convention for other internal types it creates. So treating
4965 all entity names that end with an "N" as a name suffix causes
4966 some regressions. For instance, consider the case of an enumerated
4967 type. To support the 'Image attribute, it creates an array whose
4969 Having a single character like this as a suffix carrying some
4970 information is a bit risky. Perhaps we should change the encoding
4971 to be something like "_N" instead. In the meantime, do not do
4972 the following check. */
4973 /* Protected Object Subprograms */
4974 if (len == 1 && str [0] == 'N')
4979 if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2]))
4982 while (isdigit (matching[0]))
4984 if ((matching[0] == 'b' || matching[0] == 's')
4985 && matching [1] == '\0')
4989 /* ??? We should not modify STR directly, as we are doing below. This
4990 is fine in this case, but may become problematic later if we find
4991 that this alternative did not work, and want to try matching
4992 another one from the begining of STR. Since we modified it, we
4993 won't be able to find the begining of the string anymore! */
4997 while (str[0] != '_' && str[0] != '\0')
4999 if (str[0] != 'n' && str[0] != 'b')
5005 if (str[0] == '\000')
5010 if (str[1] != '_' || str[2] == '\000')
5014 if (strcmp (str + 3, "JM") == 0)
5016 /* FIXME: brobecker/2004-09-30: GNAT will soon stop using
5017 the LJM suffix in favor of the JM one. But we will
5018 still accept LJM as a valid suffix for a reasonable
5019 amount of time, just to allow ourselves to debug programs
5020 compiled using an older version of GNAT. */
5021 if (strcmp (str + 3, "LJM") == 0)
5025 if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B'
5026 || str[4] == 'U' || str[4] == 'P')
5028 if (str[4] == 'R' && str[5] != 'T')
5032 if (!isdigit (str[2]))
5034 for (k = 3; str[k] != '\0'; k += 1)
5035 if (!isdigit (str[k]) && str[k] != '_')
5039 if (str[0] == '$' && isdigit (str[1]))
5041 for (k = 2; str[k] != '\0'; k += 1)
5042 if (!isdigit (str[k]) && str[k] != '_')
5049 /* Return nonzero if the given string starts with a dot ('.')
5050 followed by zero or more digits.
5052 Note: brobecker/2003-11-10: A forward declaration has not been
5053 added at the begining of this file yet, because this function
5054 is only used to work around a problem found during wild matching
5055 when trying to match minimal symbol names against symbol names
5056 obtained from dwarf-2 data. This function is therefore currently
5057 only used in wild_match() and is likely to be deleted when the
5058 problem in dwarf-2 is fixed. */
5061 is_dot_digits_suffix (const char *str)
5067 while (isdigit (str[0]))
5069 return (str[0] == '\0');
5072 /* Return non-zero if the string starting at NAME and ending before
5073 NAME_END contains no capital letters. */
5076 is_valid_name_for_wild_match (const char *name0)
5078 const char *decoded_name = ada_decode (name0);
5081 for (i=0; decoded_name[i] != '\0'; i++)
5082 if (isalpha (decoded_name[i]) && !islower (decoded_name[i]))
5088 /* True if NAME represents a name of the form A1.A2....An, n>=1 and
5089 PATN[0..PATN_LEN-1] = Ak.Ak+1.....An for some k >= 1. Ignores
5090 informational suffixes of NAME (i.e., for which is_name_suffix is
5094 wild_match (const char *patn0, int patn_len, const char *name0)
5101 /* FIXME: brobecker/2003-11-10: For some reason, the symbol name
5102 stored in the symbol table for nested function names is sometimes
5103 different from the name of the associated entity stored in
5104 the dwarf-2 data: This is the case for nested subprograms, where
5105 the minimal symbol name contains a trailing ".[:digit:]+" suffix,
5106 while the symbol name from the dwarf-2 data does not.
5108 Although the DWARF-2 standard documents that entity names stored
5109 in the dwarf-2 data should be identical to the name as seen in
5110 the source code, GNAT takes a different approach as we already use
5111 a special encoding mechanism to convey the information so that
5112 a C debugger can still use the information generated to debug
5113 Ada programs. A corollary is that the symbol names in the dwarf-2
5114 data should match the names found in the symbol table. I therefore
5115 consider this issue as a compiler defect.
5117 Until the compiler is properly fixed, we work-around the problem
5118 by ignoring such suffixes during the match. We do so by making
5119 a copy of PATN0 and NAME0, and then by stripping such a suffix
5120 if present. We then perform the match on the resulting strings. */
5123 name_len = strlen (name0);
5125 name = name_start = (char *) alloca ((name_len + 1) * sizeof (char));
5126 strcpy (name, name0);
5127 dot = strrchr (name, '.');
5128 if (dot != NULL && is_dot_digits_suffix (dot))
5131 patn = (char *) alloca ((patn_len + 1) * sizeof (char));
5132 strncpy (patn, patn0, patn_len);
5133 patn[patn_len] = '\0';
5134 dot = strrchr (patn, '.');
5135 if (dot != NULL && is_dot_digits_suffix (dot))
5138 patn_len = dot - patn;
5142 /* Now perform the wild match. */
5144 name_len = strlen (name);
5145 if (name_len >= patn_len + 5 && strncmp (name, "_ada_", 5) == 0
5146 && strncmp (patn, name + 5, patn_len) == 0
5147 && is_name_suffix (name + patn_len + 5))
5150 while (name_len >= patn_len)
5152 if (strncmp (patn, name, patn_len) == 0
5153 && is_name_suffix (name + patn_len))
5154 return (name == name_start || is_valid_name_for_wild_match (name0));
5161 && name[0] != '.' && (name[0] != '_' || name[1] != '_'));
5166 if (!islower (name[2]))
5173 if (!islower (name[1]))
5184 /* Add symbols from BLOCK matching identifier NAME in DOMAIN to
5185 vector *defn_symbols, updating the list of symbols in OBSTACKP
5186 (if necessary). If WILD, treat as NAME with a wildcard prefix.
5187 OBJFILE is the section containing BLOCK.
5188 SYMTAB is recorded with each symbol added. */
5191 ada_add_block_symbols (struct obstack *obstackp,
5192 struct block *block, const char *name,
5193 domain_enum domain, struct objfile *objfile,
5196 struct dict_iterator iter;
5197 int name_len = strlen (name);
5198 /* A matching argument symbol, if any. */
5199 struct symbol *arg_sym;
5200 /* Set true when we find a matching non-argument symbol. */
5209 ALL_BLOCK_SYMBOLS (block, iter, sym)
5211 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5212 SYMBOL_DOMAIN (sym), domain)
5213 && wild_match (name, name_len, SYMBOL_LINKAGE_NAME (sym)))
5215 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
5217 else if (SYMBOL_IS_ARGUMENT (sym))
5222 add_defn_to_vec (obstackp,
5223 fixup_symbol_section (sym, objfile),
5231 ALL_BLOCK_SYMBOLS (block, iter, sym)
5233 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5234 SYMBOL_DOMAIN (sym), domain))
5236 int cmp = strncmp (name, SYMBOL_LINKAGE_NAME (sym), name_len);
5238 && is_name_suffix (SYMBOL_LINKAGE_NAME (sym) + name_len))
5240 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5242 if (SYMBOL_IS_ARGUMENT (sym))
5247 add_defn_to_vec (obstackp,
5248 fixup_symbol_section (sym, objfile),
5257 if (!found_sym && arg_sym != NULL)
5259 add_defn_to_vec (obstackp,
5260 fixup_symbol_section (arg_sym, objfile),
5269 ALL_BLOCK_SYMBOLS (block, iter, sym)
5271 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5272 SYMBOL_DOMAIN (sym), domain))
5276 cmp = (int) '_' - (int) SYMBOL_LINKAGE_NAME (sym)[0];
5279 cmp = strncmp ("_ada_", SYMBOL_LINKAGE_NAME (sym), 5);
5281 cmp = strncmp (name, SYMBOL_LINKAGE_NAME (sym) + 5,
5286 && is_name_suffix (SYMBOL_LINKAGE_NAME (sym) + name_len + 5))
5288 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5290 if (SYMBOL_IS_ARGUMENT (sym))
5295 add_defn_to_vec (obstackp,
5296 fixup_symbol_section (sym, objfile),
5304 /* NOTE: This really shouldn't be needed for _ada_ symbols.
5305 They aren't parameters, right? */
5306 if (!found_sym && arg_sym != NULL)
5308 add_defn_to_vec (obstackp,
5309 fixup_symbol_section (arg_sym, objfile),
5316 /* Symbol Completion */
5318 /* If SYM_NAME is a completion candidate for TEXT, return this symbol
5319 name in a form that's appropriate for the completion. The result
5320 does not need to be deallocated, but is only good until the next call.
5322 TEXT_LEN is equal to the length of TEXT.
5323 Perform a wild match if WILD_MATCH is set.
5324 ENCODED should be set if TEXT represents the start of a symbol name
5325 in its encoded form. */
5328 symbol_completion_match (const char *sym_name,
5329 const char *text, int text_len,
5330 int wild_match, int encoded)
5333 const int verbatim_match = (text[0] == '<');
5338 /* Strip the leading angle bracket. */
5343 /* First, test against the fully qualified name of the symbol. */
5345 if (strncmp (sym_name, text, text_len) == 0)
5348 if (match && !encoded)
5350 /* One needed check before declaring a positive match is to verify
5351 that iff we are doing a verbatim match, the decoded version
5352 of the symbol name starts with '<'. Otherwise, this symbol name
5353 is not a suitable completion. */
5354 const char *sym_name_copy = sym_name;
5355 int has_angle_bracket;
5357 sym_name = ada_decode (sym_name);
5358 has_angle_bracket = (sym_name[0] == '<');
5359 match = (has_angle_bracket == verbatim_match);
5360 sym_name = sym_name_copy;
5363 if (match && !verbatim_match)
5365 /* When doing non-verbatim match, another check that needs to
5366 be done is to verify that the potentially matching symbol name
5367 does not include capital letters, because the ada-mode would
5368 not be able to understand these symbol names without the
5369 angle bracket notation. */
5372 for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++);
5377 /* Second: Try wild matching... */
5379 if (!match && wild_match)
5381 /* Since we are doing wild matching, this means that TEXT
5382 may represent an unqualified symbol name. We therefore must
5383 also compare TEXT against the unqualified name of the symbol. */
5384 sym_name = ada_unqualified_name (ada_decode (sym_name));
5386 if (strncmp (sym_name, text, text_len) == 0)
5390 /* Finally: If we found a mach, prepare the result to return. */
5396 sym_name = add_angle_brackets (sym_name);
5399 sym_name = ada_decode (sym_name);
5404 typedef char *char_ptr;
5405 DEF_VEC_P (char_ptr);
5407 /* A companion function to ada_make_symbol_completion_list().
5408 Check if SYM_NAME represents a symbol which name would be suitable
5409 to complete TEXT (TEXT_LEN is the length of TEXT), in which case
5410 it is appended at the end of the given string vector SV.
5412 ORIG_TEXT is the string original string from the user command
5413 that needs to be completed. WORD is the entire command on which
5414 completion should be performed. These two parameters are used to
5415 determine which part of the symbol name should be added to the
5417 if WILD_MATCH is set, then wild matching is performed.
5418 ENCODED should be set if TEXT represents a symbol name in its
5419 encoded formed (in which case the completion should also be
5423 symbol_completion_add (VEC(char_ptr) **sv,
5424 const char *sym_name,
5425 const char *text, int text_len,
5426 const char *orig_text, const char *word,
5427 int wild_match, int encoded)
5429 const char *match = symbol_completion_match (sym_name, text, text_len,
5430 wild_match, encoded);
5436 /* We found a match, so add the appropriate completion to the given
5439 if (word == orig_text)
5441 completion = xmalloc (strlen (match) + 5);
5442 strcpy (completion, match);
5444 else if (word > orig_text)
5446 /* Return some portion of sym_name. */
5447 completion = xmalloc (strlen (match) + 5);
5448 strcpy (completion, match + (word - orig_text));
5452 /* Return some of ORIG_TEXT plus sym_name. */
5453 completion = xmalloc (strlen (match) + (orig_text - word) + 5);
5454 strncpy (completion, word, orig_text - word);
5455 completion[orig_text - word] = '\0';
5456 strcat (completion, match);
5459 VEC_safe_push (char_ptr, *sv, completion);
5462 /* Return a list of possible symbol names completing TEXT0. The list
5463 is NULL terminated. WORD is the entire command on which completion
5467 ada_make_symbol_completion_list (char *text0, char *word)
5473 VEC(char_ptr) *completions = VEC_alloc (char_ptr, 128);
5476 struct partial_symtab *ps;
5477 struct minimal_symbol *msymbol;
5478 struct objfile *objfile;
5479 struct block *b, *surrounding_static_block = 0;
5481 struct dict_iterator iter;
5483 if (text0[0] == '<')
5485 text = xstrdup (text0);
5486 make_cleanup (xfree, text);
5487 text_len = strlen (text);
5493 text = xstrdup (ada_encode (text0));
5494 make_cleanup (xfree, text);
5495 text_len = strlen (text);
5496 for (i = 0; i < text_len; i++)
5497 text[i] = tolower (text[i]);
5499 encoded = (strstr (text0, "__") != NULL);
5500 /* If the name contains a ".", then the user is entering a fully
5501 qualified entity name, and the match must not be done in wild
5502 mode. Similarly, if the user wants to complete what looks like
5503 an encoded name, the match must not be done in wild mode. */
5504 wild_match = (strchr (text0, '.') == NULL && !encoded);
5507 /* First, look at the partial symtab symbols. */
5508 ALL_PSYMTABS (objfile, ps)
5510 struct partial_symbol **psym;
5512 /* If the psymtab's been read in we'll get it when we search
5513 through the blockvector. */
5517 for (psym = objfile->global_psymbols.list + ps->globals_offset;
5518 psym < (objfile->global_psymbols.list + ps->globals_offset
5519 + ps->n_global_syms); psym++)
5522 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (*psym),
5523 text, text_len, text0, word,
5524 wild_match, encoded);
5527 for (psym = objfile->static_psymbols.list + ps->statics_offset;
5528 psym < (objfile->static_psymbols.list + ps->statics_offset
5529 + ps->n_static_syms); psym++)
5532 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (*psym),
5533 text, text_len, text0, word,
5534 wild_match, encoded);
5538 /* At this point scan through the misc symbol vectors and add each
5539 symbol you find to the list. Eventually we want to ignore
5540 anything that isn't a text symbol (everything else will be
5541 handled by the psymtab code above). */
5543 ALL_MSYMBOLS (objfile, msymbol)
5546 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (msymbol),
5547 text, text_len, text0, word, wild_match, encoded);
5550 /* Search upwards from currently selected frame (so that we can
5551 complete on local vars. */
5553 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
5555 if (!BLOCK_SUPERBLOCK (b))
5556 surrounding_static_block = b; /* For elmin of dups */
5558 ALL_BLOCK_SYMBOLS (b, iter, sym)
5560 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5561 text, text_len, text0, word,
5562 wild_match, encoded);
5566 /* Go through the symtabs and check the externs and statics for
5567 symbols which match. */
5569 ALL_SYMTABS (objfile, s)
5572 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
5573 ALL_BLOCK_SYMBOLS (b, iter, sym)
5575 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5576 text, text_len, text0, word,
5577 wild_match, encoded);
5581 ALL_SYMTABS (objfile, s)
5584 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
5585 /* Don't do this block twice. */
5586 if (b == surrounding_static_block)
5588 ALL_BLOCK_SYMBOLS (b, iter, sym)
5590 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5591 text, text_len, text0, word,
5592 wild_match, encoded);
5596 /* Append the closing NULL entry. */
5597 VEC_safe_push (char_ptr, completions, NULL);
5599 /* Make a copy of the COMPLETIONS VEC before we free it, and then
5600 return the copy. It's unfortunate that we have to make a copy
5601 of an array that we're about to destroy, but there is nothing much
5602 we can do about it. Fortunately, it's typically not a very large
5605 const size_t completions_size =
5606 VEC_length (char_ptr, completions) * sizeof (char *);
5607 char **result = malloc (completions_size);
5609 memcpy (result, VEC_address (char_ptr, completions), completions_size);
5611 VEC_free (char_ptr, completions);
5618 /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used
5619 for tagged types. */
5622 ada_is_dispatch_table_ptr_type (struct type *type)
5626 if (TYPE_CODE (type) != TYPE_CODE_PTR)
5629 name = TYPE_NAME (TYPE_TARGET_TYPE (type));
5633 return (strcmp (name, "ada__tags__dispatch_table") == 0);
5636 /* True if field number FIELD_NUM in struct or union type TYPE is supposed
5637 to be invisible to users. */
5640 ada_is_ignored_field (struct type *type, int field_num)
5642 if (field_num < 0 || field_num > TYPE_NFIELDS (type))
5645 /* Check the name of that field. */
5647 const char *name = TYPE_FIELD_NAME (type, field_num);
5649 /* Anonymous field names should not be printed.
5650 brobecker/2007-02-20: I don't think this can actually happen
5651 but we don't want to print the value of annonymous fields anyway. */
5655 /* A field named "_parent" is internally generated by GNAT for
5656 tagged types, and should not be printed either. */
5657 if (name[0] == '_' && strncmp (name, "_parent", 7) != 0)
5661 /* If this is the dispatch table of a tagged type, then ignore. */
5662 if (ada_is_tagged_type (type, 1)
5663 && ada_is_dispatch_table_ptr_type (TYPE_FIELD_TYPE (type, field_num)))
5666 /* Not a special field, so it should not be ignored. */
5670 /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a
5671 pointer or reference type whose ultimate target has a tag field. */
5674 ada_is_tagged_type (struct type *type, int refok)
5676 return (ada_lookup_struct_elt_type (type, "_tag", refok, 1, NULL) != NULL);
5679 /* True iff TYPE represents the type of X'Tag */
5682 ada_is_tag_type (struct type *type)
5684 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_PTR)
5688 const char *name = ada_type_name (TYPE_TARGET_TYPE (type));
5689 return (name != NULL
5690 && strcmp (name, "ada__tags__dispatch_table") == 0);
5694 /* The type of the tag on VAL. */
5697 ada_tag_type (struct value *val)
5699 return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0, NULL);
5702 /* The value of the tag on VAL. */
5705 ada_value_tag (struct value *val)
5707 return ada_value_struct_elt (val, "_tag", 0);
5710 /* The value of the tag on the object of type TYPE whose contents are
5711 saved at VALADDR, if it is non-null, or is at memory address
5714 static struct value *
5715 value_tag_from_contents_and_address (struct type *type,
5716 const gdb_byte *valaddr,
5719 int tag_byte_offset, dummy1, dummy2;
5720 struct type *tag_type;
5721 if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset,
5724 const gdb_byte *valaddr1 = ((valaddr == NULL)
5726 : valaddr + tag_byte_offset);
5727 CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset;
5729 return value_from_contents_and_address (tag_type, valaddr1, address1);
5734 static struct type *
5735 type_from_tag (struct value *tag)
5737 const char *type_name = ada_tag_name (tag);
5738 if (type_name != NULL)
5739 return ada_find_any_type (ada_encode (type_name));
5750 static int ada_tag_name_1 (void *);
5751 static int ada_tag_name_2 (struct tag_args *);
5753 /* Wrapper function used by ada_tag_name. Given a struct tag_args*
5754 value ARGS, sets ARGS->name to the tag name of ARGS->tag.
5755 The value stored in ARGS->name is valid until the next call to
5759 ada_tag_name_1 (void *args0)
5761 struct tag_args *args = (struct tag_args *) args0;
5762 static char name[1024];
5766 val = ada_value_struct_elt (args->tag, "tsd", 1);
5768 return ada_tag_name_2 (args);
5769 val = ada_value_struct_elt (val, "expanded_name", 1);
5772 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
5773 for (p = name; *p != '\0'; p += 1)
5780 /* Utility function for ada_tag_name_1 that tries the second
5781 representation for the dispatch table (in which there is no
5782 explicit 'tsd' field in the referent of the tag pointer, and instead
5783 the tsd pointer is stored just before the dispatch table. */
5786 ada_tag_name_2 (struct tag_args *args)
5788 struct type *info_type;
5789 static char name[1024];
5791 struct value *val, *valp;
5794 info_type = ada_find_any_type ("ada__tags__type_specific_data");
5795 if (info_type == NULL)
5797 info_type = lookup_pointer_type (lookup_pointer_type (info_type));
5798 valp = value_cast (info_type, args->tag);
5801 val = value_ind (value_add (valp, value_from_longest (builtin_type_int, -1)));
5804 val = ada_value_struct_elt (val, "expanded_name", 1);
5807 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
5808 for (p = name; *p != '\0'; p += 1)
5815 /* The type name of the dynamic type denoted by the 'tag value TAG, as
5819 ada_tag_name (struct value *tag)
5821 struct tag_args args;
5822 if (!ada_is_tag_type (value_type (tag)))
5826 catch_errors (ada_tag_name_1, &args, NULL, RETURN_MASK_ALL);
5830 /* The parent type of TYPE, or NULL if none. */
5833 ada_parent_type (struct type *type)
5837 type = ada_check_typedef (type);
5839 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
5842 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
5843 if (ada_is_parent_field (type, i))
5844 return ada_check_typedef (TYPE_FIELD_TYPE (type, i));
5849 /* True iff field number FIELD_NUM of structure type TYPE contains the
5850 parent-type (inherited) fields of a derived type. Assumes TYPE is
5851 a structure type with at least FIELD_NUM+1 fields. */
5854 ada_is_parent_field (struct type *type, int field_num)
5856 const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num);
5857 return (name != NULL
5858 && (strncmp (name, "PARENT", 6) == 0
5859 || strncmp (name, "_parent", 7) == 0));
5862 /* True iff field number FIELD_NUM of structure type TYPE is a
5863 transparent wrapper field (which should be silently traversed when doing
5864 field selection and flattened when printing). Assumes TYPE is a
5865 structure type with at least FIELD_NUM+1 fields. Such fields are always
5869 ada_is_wrapper_field (struct type *type, int field_num)
5871 const char *name = TYPE_FIELD_NAME (type, field_num);
5872 return (name != NULL
5873 && (strncmp (name, "PARENT", 6) == 0
5874 || strcmp (name, "REP") == 0
5875 || strncmp (name, "_parent", 7) == 0
5876 || name[0] == 'S' || name[0] == 'R' || name[0] == 'O'));
5879 /* True iff field number FIELD_NUM of structure or union type TYPE
5880 is a variant wrapper. Assumes TYPE is a structure type with at least
5881 FIELD_NUM+1 fields. */
5884 ada_is_variant_part (struct type *type, int field_num)
5886 struct type *field_type = TYPE_FIELD_TYPE (type, field_num);
5887 return (TYPE_CODE (field_type) == TYPE_CODE_UNION
5888 || (is_dynamic_field (type, field_num)
5889 && (TYPE_CODE (TYPE_TARGET_TYPE (field_type))
5890 == TYPE_CODE_UNION)));
5893 /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part)
5894 whose discriminants are contained in the record type OUTER_TYPE,
5895 returns the type of the controlling discriminant for the variant. */
5898 ada_variant_discrim_type (struct type *var_type, struct type *outer_type)
5900 char *name = ada_variant_discrim_name (var_type);
5902 ada_lookup_struct_elt_type (outer_type, name, 1, 1, NULL);
5904 return builtin_type_int;
5909 /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a
5910 valid field number within it, returns 1 iff field FIELD_NUM of TYPE
5911 represents a 'when others' clause; otherwise 0. */
5914 ada_is_others_clause (struct type *type, int field_num)
5916 const char *name = TYPE_FIELD_NAME (type, field_num);
5917 return (name != NULL && name[0] == 'O');
5920 /* Assuming that TYPE0 is the type of the variant part of a record,
5921 returns the name of the discriminant controlling the variant.
5922 The value is valid until the next call to ada_variant_discrim_name. */
5925 ada_variant_discrim_name (struct type *type0)
5927 static char *result = NULL;
5928 static size_t result_len = 0;
5931 const char *discrim_end;
5932 const char *discrim_start;
5934 if (TYPE_CODE (type0) == TYPE_CODE_PTR)
5935 type = TYPE_TARGET_TYPE (type0);
5939 name = ada_type_name (type);
5941 if (name == NULL || name[0] == '\000')
5944 for (discrim_end = name + strlen (name) - 6; discrim_end != name;
5947 if (strncmp (discrim_end, "___XVN", 6) == 0)
5950 if (discrim_end == name)
5953 for (discrim_start = discrim_end; discrim_start != name + 3;
5956 if (discrim_start == name + 1)
5958 if ((discrim_start > name + 3
5959 && strncmp (discrim_start - 3, "___", 3) == 0)
5960 || discrim_start[-1] == '.')
5964 GROW_VECT (result, result_len, discrim_end - discrim_start + 1);
5965 strncpy (result, discrim_start, discrim_end - discrim_start);
5966 result[discrim_end - discrim_start] = '\0';
5970 /* Scan STR for a subtype-encoded number, beginning at position K.
5971 Put the position of the character just past the number scanned in
5972 *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL.
5973 Return 1 if there was a valid number at the given position, and 0
5974 otherwise. A "subtype-encoded" number consists of the absolute value
5975 in decimal, followed by the letter 'm' to indicate a negative number.
5976 Assumes 0m does not occur. */
5979 ada_scan_number (const char str[], int k, LONGEST * R, int *new_k)
5983 if (!isdigit (str[k]))
5986 /* Do it the hard way so as not to make any assumption about
5987 the relationship of unsigned long (%lu scan format code) and
5990 while (isdigit (str[k]))
5992 RU = RU * 10 + (str[k] - '0');
5999 *R = (-(LONGEST) (RU - 1)) - 1;
6005 /* NOTE on the above: Technically, C does not say what the results of
6006 - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive
6007 number representable as a LONGEST (although either would probably work
6008 in most implementations). When RU>0, the locution in the then branch
6009 above is always equivalent to the negative of RU. */
6016 /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field),
6017 and FIELD_NUM is a valid field number within it, returns 1 iff VAL is
6018 in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */
6021 ada_in_variant (LONGEST val, struct type *type, int field_num)
6023 const char *name = TYPE_FIELD_NAME (type, field_num);
6036 if (!ada_scan_number (name, p + 1, &W, &p))
6045 if (!ada_scan_number (name, p + 1, &L, &p)
6046 || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p))
6048 if (val >= L && val <= U)
6060 /* FIXME: Lots of redundancy below. Try to consolidate. */
6062 /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type
6063 ARG_TYPE, extract and return the value of one of its (non-static)
6064 fields. FIELDNO says which field. Differs from value_primitive_field
6065 only in that it can handle packed values of arbitrary type. */
6067 static struct value *
6068 ada_value_primitive_field (struct value *arg1, int offset, int fieldno,
6069 struct type *arg_type)
6073 arg_type = ada_check_typedef (arg_type);
6074 type = TYPE_FIELD_TYPE (arg_type, fieldno);
6076 /* Handle packed fields. */
6078 if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0)
6080 int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno);
6081 int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno);
6083 return ada_value_primitive_packed_val (arg1, value_contents (arg1),
6084 offset + bit_pos / 8,
6085 bit_pos % 8, bit_size, type);
6088 return value_primitive_field (arg1, offset, fieldno, arg_type);
6091 /* Find field with name NAME in object of type TYPE. If found,
6092 set the following for each argument that is non-null:
6093 - *FIELD_TYPE_P to the field's type;
6094 - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within
6095 an object of that type;
6096 - *BIT_OFFSET_P to the bit offset modulo byte size of the field;
6097 - *BIT_SIZE_P to its size in bits if the field is packed, and
6099 If INDEX_P is non-null, increment *INDEX_P by the number of source-visible
6100 fields up to but not including the desired field, or by the total
6101 number of fields if not found. A NULL value of NAME never
6102 matches; the function just counts visible fields in this case.
6104 Returns 1 if found, 0 otherwise. */
6107 find_struct_field (char *name, struct type *type, int offset,
6108 struct type **field_type_p,
6109 int *byte_offset_p, int *bit_offset_p, int *bit_size_p,
6114 type = ada_check_typedef (type);
6116 if (field_type_p != NULL)
6117 *field_type_p = NULL;
6118 if (byte_offset_p != NULL)
6120 if (bit_offset_p != NULL)
6122 if (bit_size_p != NULL)
6125 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6127 int bit_pos = TYPE_FIELD_BITPOS (type, i);
6128 int fld_offset = offset + bit_pos / 8;
6129 char *t_field_name = TYPE_FIELD_NAME (type, i);
6131 if (t_field_name == NULL)
6134 else if (name != NULL && field_name_match (t_field_name, name))
6136 int bit_size = TYPE_FIELD_BITSIZE (type, i);
6137 if (field_type_p != NULL)
6138 *field_type_p = TYPE_FIELD_TYPE (type, i);
6139 if (byte_offset_p != NULL)
6140 *byte_offset_p = fld_offset;
6141 if (bit_offset_p != NULL)
6142 *bit_offset_p = bit_pos % 8;
6143 if (bit_size_p != NULL)
6144 *bit_size_p = bit_size;
6147 else if (ada_is_wrapper_field (type, i))
6149 if (find_struct_field (name, TYPE_FIELD_TYPE (type, i), fld_offset,
6150 field_type_p, byte_offset_p, bit_offset_p,
6151 bit_size_p, index_p))
6154 else if (ada_is_variant_part (type, i))
6156 /* PNH: Wait. Do we ever execute this section, or is ARG always of
6159 struct type *field_type
6160 = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6162 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
6164 if (find_struct_field (name, TYPE_FIELD_TYPE (field_type, j),
6166 + TYPE_FIELD_BITPOS (field_type, j) / 8,
6167 field_type_p, byte_offset_p,
6168 bit_offset_p, bit_size_p, index_p))
6172 else if (index_p != NULL)
6178 /* Number of user-visible fields in record type TYPE. */
6181 num_visible_fields (struct type *type)
6185 find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n);
6189 /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes,
6190 and search in it assuming it has (class) type TYPE.
6191 If found, return value, else return NULL.
6193 Searches recursively through wrapper fields (e.g., '_parent'). */
6195 static struct value *
6196 ada_search_struct_field (char *name, struct value *arg, int offset,
6200 type = ada_check_typedef (type);
6202 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6204 char *t_field_name = TYPE_FIELD_NAME (type, i);
6206 if (t_field_name == NULL)
6209 else if (field_name_match (t_field_name, name))
6210 return ada_value_primitive_field (arg, offset, i, type);
6212 else if (ada_is_wrapper_field (type, i))
6214 struct value *v = /* Do not let indent join lines here. */
6215 ada_search_struct_field (name, arg,
6216 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6217 TYPE_FIELD_TYPE (type, i));
6222 else if (ada_is_variant_part (type, i))
6224 /* PNH: Do we ever get here? See find_struct_field. */
6226 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6227 int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8;
6229 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
6231 struct value *v = ada_search_struct_field /* Force line break. */
6233 var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8,
6234 TYPE_FIELD_TYPE (field_type, j));
6243 static struct value *ada_index_struct_field_1 (int *, struct value *,
6244 int, struct type *);
6247 /* Return field #INDEX in ARG, where the index is that returned by
6248 * find_struct_field through its INDEX_P argument. Adjust the address
6249 * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE.
6250 * If found, return value, else return NULL. */
6252 static struct value *
6253 ada_index_struct_field (int index, struct value *arg, int offset,
6256 return ada_index_struct_field_1 (&index, arg, offset, type);
6260 /* Auxiliary function for ada_index_struct_field. Like
6261 * ada_index_struct_field, but takes index from *INDEX_P and modifies
6264 static struct value *
6265 ada_index_struct_field_1 (int *index_p, struct value *arg, int offset,
6269 type = ada_check_typedef (type);
6271 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6273 if (TYPE_FIELD_NAME (type, i) == NULL)
6275 else if (ada_is_wrapper_field (type, i))
6277 struct value *v = /* Do not let indent join lines here. */
6278 ada_index_struct_field_1 (index_p, arg,
6279 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6280 TYPE_FIELD_TYPE (type, i));
6285 else if (ada_is_variant_part (type, i))
6287 /* PNH: Do we ever get here? See ada_search_struct_field,
6288 find_struct_field. */
6289 error (_("Cannot assign this kind of variant record"));
6291 else if (*index_p == 0)
6292 return ada_value_primitive_field (arg, offset, i, type);
6299 /* Given ARG, a value of type (pointer or reference to a)*
6300 structure/union, extract the component named NAME from the ultimate
6301 target structure/union and return it as a value with its
6302 appropriate type. If ARG is a pointer or reference and the field
6303 is not packed, returns a reference to the field, otherwise the
6304 value of the field (an lvalue if ARG is an lvalue).
6306 The routine searches for NAME among all members of the structure itself
6307 and (recursively) among all members of any wrapper members
6310 If NO_ERR, then simply return NULL in case of error, rather than
6314 ada_value_struct_elt (struct value *arg, char *name, int no_err)
6316 struct type *t, *t1;
6320 t1 = t = ada_check_typedef (value_type (arg));
6321 if (TYPE_CODE (t) == TYPE_CODE_REF)
6323 t1 = TYPE_TARGET_TYPE (t);
6326 t1 = ada_check_typedef (t1);
6327 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
6329 arg = coerce_ref (arg);
6334 while (TYPE_CODE (t) == TYPE_CODE_PTR)
6336 t1 = TYPE_TARGET_TYPE (t);
6339 t1 = ada_check_typedef (t1);
6340 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
6342 arg = value_ind (arg);
6349 if (TYPE_CODE (t1) != TYPE_CODE_STRUCT && TYPE_CODE (t1) != TYPE_CODE_UNION)
6353 v = ada_search_struct_field (name, arg, 0, t);
6356 int bit_offset, bit_size, byte_offset;
6357 struct type *field_type;
6360 if (TYPE_CODE (t) == TYPE_CODE_PTR)
6361 address = value_as_address (arg);
6363 address = unpack_pointer (t, value_contents (arg));
6365 t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, address, NULL, 1);
6366 if (find_struct_field (name, t1, 0,
6367 &field_type, &byte_offset, &bit_offset,
6372 if (TYPE_CODE (t) == TYPE_CODE_REF)
6373 arg = ada_coerce_ref (arg);
6375 arg = ada_value_ind (arg);
6376 v = ada_value_primitive_packed_val (arg, NULL, byte_offset,
6377 bit_offset, bit_size,
6381 v = value_from_pointer (lookup_reference_type (field_type),
6382 address + byte_offset);
6386 if (v != NULL || no_err)
6389 error (_("There is no member named %s."), name);
6395 error (_("Attempt to extract a component of a value that is not a record."));
6398 /* Given a type TYPE, look up the type of the component of type named NAME.
6399 If DISPP is non-null, add its byte displacement from the beginning of a
6400 structure (pointed to by a value) of type TYPE to *DISPP (does not
6401 work for packed fields).
6403 Matches any field whose name has NAME as a prefix, possibly
6406 TYPE can be either a struct or union. If REFOK, TYPE may also
6407 be a (pointer or reference)+ to a struct or union, and the
6408 ultimate target type will be searched.
6410 Looks recursively into variant clauses and parent types.
6412 If NOERR is nonzero, return NULL if NAME is not suitably defined or
6413 TYPE is not a type of the right kind. */
6415 static struct type *
6416 ada_lookup_struct_elt_type (struct type *type, char *name, int refok,
6417 int noerr, int *dispp)
6424 if (refok && type != NULL)
6427 type = ada_check_typedef (type);
6428 if (TYPE_CODE (type) != TYPE_CODE_PTR
6429 && TYPE_CODE (type) != TYPE_CODE_REF)
6431 type = TYPE_TARGET_TYPE (type);
6435 || (TYPE_CODE (type) != TYPE_CODE_STRUCT
6436 && TYPE_CODE (type) != TYPE_CODE_UNION))
6442 target_terminal_ours ();
6443 gdb_flush (gdb_stdout);
6445 error (_("Type (null) is not a structure or union type"));
6448 /* XXX: type_sprint */
6449 fprintf_unfiltered (gdb_stderr, _("Type "));
6450 type_print (type, "", gdb_stderr, -1);
6451 error (_(" is not a structure or union type"));
6456 type = to_static_fixed_type (type);
6458 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6460 char *t_field_name = TYPE_FIELD_NAME (type, i);
6464 if (t_field_name == NULL)
6467 else if (field_name_match (t_field_name, name))
6470 *dispp += TYPE_FIELD_BITPOS (type, i) / 8;
6471 return ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6474 else if (ada_is_wrapper_field (type, i))
6477 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name,
6482 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
6487 else if (ada_is_variant_part (type, i))
6490 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6492 for (j = TYPE_NFIELDS (field_type) - 1; j >= 0; j -= 1)
6495 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (field_type, j),
6500 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
6511 target_terminal_ours ();
6512 gdb_flush (gdb_stdout);
6515 /* XXX: type_sprint */
6516 fprintf_unfiltered (gdb_stderr, _("Type "));
6517 type_print (type, "", gdb_stderr, -1);
6518 error (_(" has no component named <null>"));
6522 /* XXX: type_sprint */
6523 fprintf_unfiltered (gdb_stderr, _("Type "));
6524 type_print (type, "", gdb_stderr, -1);
6525 error (_(" has no component named %s"), name);
6532 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
6533 within a value of type OUTER_TYPE that is stored in GDB at
6534 OUTER_VALADDR, determine which variant clause (field number in VAR_TYPE,
6535 numbering from 0) is applicable. Returns -1 if none are. */
6538 ada_which_variant_applies (struct type *var_type, struct type *outer_type,
6539 const gdb_byte *outer_valaddr)
6543 char *discrim_name = ada_variant_discrim_name (var_type);
6544 struct value *outer;
6545 struct value *discrim;
6546 LONGEST discrim_val;
6548 outer = value_from_contents_and_address (outer_type, outer_valaddr, 0);
6549 discrim = ada_value_struct_elt (outer, discrim_name, 1);
6550 if (discrim == NULL)
6552 discrim_val = value_as_long (discrim);
6555 for (i = 0; i < TYPE_NFIELDS (var_type); i += 1)
6557 if (ada_is_others_clause (var_type, i))
6559 else if (ada_in_variant (discrim_val, var_type, i))
6563 return others_clause;
6568 /* Dynamic-Sized Records */
6570 /* Strategy: The type ostensibly attached to a value with dynamic size
6571 (i.e., a size that is not statically recorded in the debugging
6572 data) does not accurately reflect the size or layout of the value.
6573 Our strategy is to convert these values to values with accurate,
6574 conventional types that are constructed on the fly. */
6576 /* There is a subtle and tricky problem here. In general, we cannot
6577 determine the size of dynamic records without its data. However,
6578 the 'struct value' data structure, which GDB uses to represent
6579 quantities in the inferior process (the target), requires the size
6580 of the type at the time of its allocation in order to reserve space
6581 for GDB's internal copy of the data. That's why the
6582 'to_fixed_xxx_type' routines take (target) addresses as parameters,
6583 rather than struct value*s.
6585 However, GDB's internal history variables ($1, $2, etc.) are
6586 struct value*s containing internal copies of the data that are not, in
6587 general, the same as the data at their corresponding addresses in
6588 the target. Fortunately, the types we give to these values are all
6589 conventional, fixed-size types (as per the strategy described
6590 above), so that we don't usually have to perform the
6591 'to_fixed_xxx_type' conversions to look at their values.
6592 Unfortunately, there is one exception: if one of the internal
6593 history variables is an array whose elements are unconstrained
6594 records, then we will need to create distinct fixed types for each
6595 element selected. */
6597 /* The upshot of all of this is that many routines take a (type, host
6598 address, target address) triple as arguments to represent a value.
6599 The host address, if non-null, is supposed to contain an internal
6600 copy of the relevant data; otherwise, the program is to consult the
6601 target at the target address. */
6603 /* Assuming that VAL0 represents a pointer value, the result of
6604 dereferencing it. Differs from value_ind in its treatment of
6605 dynamic-sized types. */
6608 ada_value_ind (struct value *val0)
6610 struct value *val = unwrap_value (value_ind (val0));
6611 return ada_to_fixed_value (val);
6614 /* The value resulting from dereferencing any "reference to"
6615 qualifiers on VAL0. */
6617 static struct value *
6618 ada_coerce_ref (struct value *val0)
6620 if (TYPE_CODE (value_type (val0)) == TYPE_CODE_REF)
6622 struct value *val = val0;
6623 val = coerce_ref (val);
6624 val = unwrap_value (val);
6625 return ada_to_fixed_value (val);
6631 /* Return OFF rounded upward if necessary to a multiple of
6632 ALIGNMENT (a power of 2). */
6635 align_value (unsigned int off, unsigned int alignment)
6637 return (off + alignment - 1) & ~(alignment - 1);
6640 /* Return the bit alignment required for field #F of template type TYPE. */
6643 field_alignment (struct type *type, int f)
6645 const char *name = TYPE_FIELD_NAME (type, f);
6649 /* The field name should never be null, unless the debugging information
6650 is somehow malformed. In this case, we assume the field does not
6651 require any alignment. */
6655 len = strlen (name);
6657 if (!isdigit (name[len - 1]))
6660 if (isdigit (name[len - 2]))
6661 align_offset = len - 2;
6663 align_offset = len - 1;
6665 if (align_offset < 7 || strncmp ("___XV", name + align_offset - 6, 5) != 0)
6666 return TARGET_CHAR_BIT;
6668 return atoi (name + align_offset) * TARGET_CHAR_BIT;
6671 /* Find a symbol named NAME. Ignores ambiguity. */
6674 ada_find_any_symbol (const char *name)
6678 sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN);
6679 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
6682 sym = standard_lookup (name, NULL, STRUCT_DOMAIN);
6686 /* Find a type named NAME. Ignores ambiguity. */
6689 ada_find_any_type (const char *name)
6691 struct symbol *sym = ada_find_any_symbol (name);
6694 return SYMBOL_TYPE (sym);
6699 /* Given NAME and an associated BLOCK, search all symbols for
6700 NAME suffixed with "___XR", which is the ``renaming'' symbol
6701 associated to NAME. Return this symbol if found, return
6705 ada_find_renaming_symbol (const char *name, struct block *block)
6709 sym = find_old_style_renaming_symbol (name, block);
6714 /* Not right yet. FIXME pnh 7/20/2007. */
6715 sym = ada_find_any_symbol (name);
6716 if (sym != NULL && strstr (SYMBOL_LINKAGE_NAME (sym), "___XR") != NULL)
6722 static struct symbol *
6723 find_old_style_renaming_symbol (const char *name, struct block *block)
6725 const struct symbol *function_sym = block_linkage_function (block);
6728 if (function_sym != NULL)
6730 /* If the symbol is defined inside a function, NAME is not fully
6731 qualified. This means we need to prepend the function name
6732 as well as adding the ``___XR'' suffix to build the name of
6733 the associated renaming symbol. */
6734 char *function_name = SYMBOL_LINKAGE_NAME (function_sym);
6735 /* Function names sometimes contain suffixes used
6736 for instance to qualify nested subprograms. When building
6737 the XR type name, we need to make sure that this suffix is
6738 not included. So do not include any suffix in the function
6739 name length below. */
6740 const int function_name_len = ada_name_prefix_len (function_name);
6741 const int rename_len = function_name_len + 2 /* "__" */
6742 + strlen (name) + 6 /* "___XR\0" */ ;
6744 /* Strip the suffix if necessary. */
6745 function_name[function_name_len] = '\0';
6747 /* Library-level functions are a special case, as GNAT adds
6748 a ``_ada_'' prefix to the function name to avoid namespace
6749 pollution. However, the renaming symbols themselves do not
6750 have this prefix, so we need to skip this prefix if present. */
6751 if (function_name_len > 5 /* "_ada_" */
6752 && strstr (function_name, "_ada_") == function_name)
6753 function_name = function_name + 5;
6755 rename = (char *) alloca (rename_len * sizeof (char));
6756 sprintf (rename, "%s__%s___XR", function_name, name);
6760 const int rename_len = strlen (name) + 6;
6761 rename = (char *) alloca (rename_len * sizeof (char));
6762 sprintf (rename, "%s___XR", name);
6765 return ada_find_any_symbol (rename);
6768 /* Because of GNAT encoding conventions, several GDB symbols may match a
6769 given type name. If the type denoted by TYPE0 is to be preferred to
6770 that of TYPE1 for purposes of type printing, return non-zero;
6771 otherwise return 0. */
6774 ada_prefer_type (struct type *type0, struct type *type1)
6778 else if (type0 == NULL)
6780 else if (TYPE_CODE (type1) == TYPE_CODE_VOID)
6782 else if (TYPE_CODE (type0) == TYPE_CODE_VOID)
6784 else if (TYPE_NAME (type1) == NULL && TYPE_NAME (type0) != NULL)
6786 else if (ada_is_packed_array_type (type0))
6788 else if (ada_is_array_descriptor_type (type0)
6789 && !ada_is_array_descriptor_type (type1))
6793 const char *type0_name = type_name_no_tag (type0);
6794 const char *type1_name = type_name_no_tag (type1);
6796 if (type0_name != NULL && strstr (type0_name, "___XR") != NULL
6797 && (type1_name == NULL || strstr (type1_name, "___XR") == NULL))
6803 /* The name of TYPE, which is either its TYPE_NAME, or, if that is
6804 null, its TYPE_TAG_NAME. Null if TYPE is null. */
6807 ada_type_name (struct type *type)
6811 else if (TYPE_NAME (type) != NULL)
6812 return TYPE_NAME (type);
6814 return TYPE_TAG_NAME (type);
6817 /* Find a parallel type to TYPE whose name is formed by appending
6818 SUFFIX to the name of TYPE. */
6821 ada_find_parallel_type (struct type *type, const char *suffix)
6824 static size_t name_len = 0;
6826 char *typename = ada_type_name (type);
6828 if (typename == NULL)
6831 len = strlen (typename);
6833 GROW_VECT (name, name_len, len + strlen (suffix) + 1);
6835 strcpy (name, typename);
6836 strcpy (name + len, suffix);
6838 return ada_find_any_type (name);
6842 /* If TYPE is a variable-size record type, return the corresponding template
6843 type describing its fields. Otherwise, return NULL. */
6845 static struct type *
6846 dynamic_template_type (struct type *type)
6848 type = ada_check_typedef (type);
6850 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT
6851 || ada_type_name (type) == NULL)
6855 int len = strlen (ada_type_name (type));
6856 if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0)
6859 return ada_find_parallel_type (type, "___XVE");
6863 /* Assuming that TEMPL_TYPE is a union or struct type, returns
6864 non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */
6867 is_dynamic_field (struct type *templ_type, int field_num)
6869 const char *name = TYPE_FIELD_NAME (templ_type, field_num);
6871 && TYPE_CODE (TYPE_FIELD_TYPE (templ_type, field_num)) == TYPE_CODE_PTR
6872 && strstr (name, "___XVL") != NULL;
6875 /* The index of the variant field of TYPE, or -1 if TYPE does not
6876 represent a variant record type. */
6879 variant_field_index (struct type *type)
6883 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
6886 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
6888 if (ada_is_variant_part (type, f))
6894 /* A record type with no fields. */
6896 static struct type *
6897 empty_record (struct objfile *objfile)
6899 struct type *type = alloc_type (objfile);
6900 TYPE_CODE (type) = TYPE_CODE_STRUCT;
6901 TYPE_NFIELDS (type) = 0;
6902 TYPE_FIELDS (type) = NULL;
6903 TYPE_NAME (type) = "<empty>";
6904 TYPE_TAG_NAME (type) = NULL;
6905 TYPE_FLAGS (type) = 0;
6906 TYPE_LENGTH (type) = 0;
6910 /* An ordinary record type (with fixed-length fields) that describes
6911 the value of type TYPE at VALADDR or ADDRESS (see comments at
6912 the beginning of this section) VAL according to GNAT conventions.
6913 DVAL0 should describe the (portion of a) record that contains any
6914 necessary discriminants. It should be NULL if value_type (VAL) is
6915 an outer-level type (i.e., as opposed to a branch of a variant.) A
6916 variant field (unless unchecked) is replaced by a particular branch
6919 If not KEEP_DYNAMIC_FIELDS, then all fields whose position or
6920 length are not statically known are discarded. As a consequence,
6921 VALADDR, ADDRESS and DVAL0 are ignored.
6923 NOTE: Limitations: For now, we assume that dynamic fields and
6924 variants occupy whole numbers of bytes. However, they need not be
6928 ada_template_to_fixed_record_type_1 (struct type *type,
6929 const gdb_byte *valaddr,
6930 CORE_ADDR address, struct value *dval0,
6931 int keep_dynamic_fields)
6933 struct value *mark = value_mark ();
6936 int nfields, bit_len;
6939 int fld_bit_len, bit_incr;
6942 /* Compute the number of fields in this record type that are going
6943 to be processed: unless keep_dynamic_fields, this includes only
6944 fields whose position and length are static will be processed. */
6945 if (keep_dynamic_fields)
6946 nfields = TYPE_NFIELDS (type);
6950 while (nfields < TYPE_NFIELDS (type)
6951 && !ada_is_variant_part (type, nfields)
6952 && !is_dynamic_field (type, nfields))
6956 rtype = alloc_type (TYPE_OBJFILE (type));
6957 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
6958 INIT_CPLUS_SPECIFIC (rtype);
6959 TYPE_NFIELDS (rtype) = nfields;
6960 TYPE_FIELDS (rtype) = (struct field *)
6961 TYPE_ALLOC (rtype, nfields * sizeof (struct field));
6962 memset (TYPE_FIELDS (rtype), 0, sizeof (struct field) * nfields);
6963 TYPE_NAME (rtype) = ada_type_name (type);
6964 TYPE_TAG_NAME (rtype) = NULL;
6965 TYPE_FLAGS (rtype) |= TYPE_FLAG_FIXED_INSTANCE;
6971 for (f = 0; f < nfields; f += 1)
6973 off = align_value (off, field_alignment (type, f))
6974 + TYPE_FIELD_BITPOS (type, f);
6975 TYPE_FIELD_BITPOS (rtype, f) = off;
6976 TYPE_FIELD_BITSIZE (rtype, f) = 0;
6978 if (ada_is_variant_part (type, f))
6981 fld_bit_len = bit_incr = 0;
6983 else if (is_dynamic_field (type, f))
6986 dval = value_from_contents_and_address (rtype, valaddr, address);
6990 /* Get the fixed type of the field. Note that, in this case, we
6991 do not want to get the real type out of the tag: if the current
6992 field is the parent part of a tagged record, we will get the
6993 tag of the object. Clearly wrong: the real type of the parent
6994 is not the real type of the child. We would end up in an infinite
6996 TYPE_FIELD_TYPE (rtype, f) =
6999 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, f))),
7000 cond_offset_host (valaddr, off / TARGET_CHAR_BIT),
7001 cond_offset_target (address, off / TARGET_CHAR_BIT), dval, 0);
7002 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
7003 bit_incr = fld_bit_len =
7004 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, f)) * TARGET_CHAR_BIT;
7008 TYPE_FIELD_TYPE (rtype, f) = TYPE_FIELD_TYPE (type, f);
7009 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
7010 if (TYPE_FIELD_BITSIZE (type, f) > 0)
7011 bit_incr = fld_bit_len =
7012 TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f);
7014 bit_incr = fld_bit_len =
7015 TYPE_LENGTH (TYPE_FIELD_TYPE (type, f)) * TARGET_CHAR_BIT;
7017 if (off + fld_bit_len > bit_len)
7018 bit_len = off + fld_bit_len;
7020 TYPE_LENGTH (rtype) =
7021 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
7024 /* We handle the variant part, if any, at the end because of certain
7025 odd cases in which it is re-ordered so as NOT the last field of
7026 the record. This can happen in the presence of representation
7028 if (variant_field >= 0)
7030 struct type *branch_type;
7032 off = TYPE_FIELD_BITPOS (rtype, variant_field);
7035 dval = value_from_contents_and_address (rtype, valaddr, address);
7040 to_fixed_variant_branch_type
7041 (TYPE_FIELD_TYPE (type, variant_field),
7042 cond_offset_host (valaddr, off / TARGET_CHAR_BIT),
7043 cond_offset_target (address, off / TARGET_CHAR_BIT), dval);
7044 if (branch_type == NULL)
7046 for (f = variant_field + 1; f < TYPE_NFIELDS (rtype); f += 1)
7047 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
7048 TYPE_NFIELDS (rtype) -= 1;
7052 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7053 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7055 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, variant_field)) *
7057 if (off + fld_bit_len > bit_len)
7058 bit_len = off + fld_bit_len;
7059 TYPE_LENGTH (rtype) =
7060 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
7064 /* According to exp_dbug.ads, the size of TYPE for variable-size records
7065 should contain the alignment of that record, which should be a strictly
7066 positive value. If null or negative, then something is wrong, most
7067 probably in the debug info. In that case, we don't round up the size
7068 of the resulting type. If this record is not part of another structure,
7069 the current RTYPE length might be good enough for our purposes. */
7070 if (TYPE_LENGTH (type) <= 0)
7072 if (TYPE_NAME (rtype))
7073 warning (_("Invalid type size for `%s' detected: %d."),
7074 TYPE_NAME (rtype), TYPE_LENGTH (type));
7076 warning (_("Invalid type size for <unnamed> detected: %d."),
7077 TYPE_LENGTH (type));
7081 TYPE_LENGTH (rtype) = align_value (TYPE_LENGTH (rtype),
7082 TYPE_LENGTH (type));
7085 value_free_to_mark (mark);
7086 if (TYPE_LENGTH (rtype) > varsize_limit)
7087 error (_("record type with dynamic size is larger than varsize-limit"));
7091 /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS
7094 static struct type *
7095 template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr,
7096 CORE_ADDR address, struct value *dval0)
7098 return ada_template_to_fixed_record_type_1 (type, valaddr,
7102 /* An ordinary record type in which ___XVL-convention fields and
7103 ___XVU- and ___XVN-convention field types in TYPE0 are replaced with
7104 static approximations, containing all possible fields. Uses
7105 no runtime values. Useless for use in values, but that's OK,
7106 since the results are used only for type determinations. Works on both
7107 structs and unions. Representation note: to save space, we memorize
7108 the result of this function in the TYPE_TARGET_TYPE of the
7111 static struct type *
7112 template_to_static_fixed_type (struct type *type0)
7118 if (TYPE_TARGET_TYPE (type0) != NULL)
7119 return TYPE_TARGET_TYPE (type0);
7121 nfields = TYPE_NFIELDS (type0);
7124 for (f = 0; f < nfields; f += 1)
7126 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type0, f));
7127 struct type *new_type;
7129 if (is_dynamic_field (type0, f))
7130 new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type));
7132 new_type = static_unwrap_type (field_type);
7133 if (type == type0 && new_type != field_type)
7135 TYPE_TARGET_TYPE (type0) = type = alloc_type (TYPE_OBJFILE (type0));
7136 TYPE_CODE (type) = TYPE_CODE (type0);
7137 INIT_CPLUS_SPECIFIC (type);
7138 TYPE_NFIELDS (type) = nfields;
7139 TYPE_FIELDS (type) = (struct field *)
7140 TYPE_ALLOC (type, nfields * sizeof (struct field));
7141 memcpy (TYPE_FIELDS (type), TYPE_FIELDS (type0),
7142 sizeof (struct field) * nfields);
7143 TYPE_NAME (type) = ada_type_name (type0);
7144 TYPE_TAG_NAME (type) = NULL;
7145 TYPE_FLAGS (type) |= TYPE_FLAG_FIXED_INSTANCE;
7146 TYPE_LENGTH (type) = 0;
7148 TYPE_FIELD_TYPE (type, f) = new_type;
7149 TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f);
7154 /* Given an object of type TYPE whose contents are at VALADDR and
7155 whose address in memory is ADDRESS, returns a revision of TYPE --
7156 a non-dynamic-sized record with a variant part -- in which
7157 the variant part is replaced with the appropriate branch. Looks
7158 for discriminant values in DVAL0, which can be NULL if the record
7159 contains the necessary discriminant values. */
7161 static struct type *
7162 to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr,
7163 CORE_ADDR address, struct value *dval0)
7165 struct value *mark = value_mark ();
7168 struct type *branch_type;
7169 int nfields = TYPE_NFIELDS (type);
7170 int variant_field = variant_field_index (type);
7172 if (variant_field == -1)
7176 dval = value_from_contents_and_address (type, valaddr, address);
7180 rtype = alloc_type (TYPE_OBJFILE (type));
7181 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
7182 INIT_CPLUS_SPECIFIC (rtype);
7183 TYPE_NFIELDS (rtype) = nfields;
7184 TYPE_FIELDS (rtype) =
7185 (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field));
7186 memcpy (TYPE_FIELDS (rtype), TYPE_FIELDS (type),
7187 sizeof (struct field) * nfields);
7188 TYPE_NAME (rtype) = ada_type_name (type);
7189 TYPE_TAG_NAME (rtype) = NULL;
7190 TYPE_FLAGS (rtype) |= TYPE_FLAG_FIXED_INSTANCE;
7191 TYPE_LENGTH (rtype) = TYPE_LENGTH (type);
7193 branch_type = to_fixed_variant_branch_type
7194 (TYPE_FIELD_TYPE (type, variant_field),
7195 cond_offset_host (valaddr,
7196 TYPE_FIELD_BITPOS (type, variant_field)
7198 cond_offset_target (address,
7199 TYPE_FIELD_BITPOS (type, variant_field)
7200 / TARGET_CHAR_BIT), dval);
7201 if (branch_type == NULL)
7204 for (f = variant_field + 1; f < nfields; f += 1)
7205 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
7206 TYPE_NFIELDS (rtype) -= 1;
7210 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7211 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7212 TYPE_FIELD_BITSIZE (rtype, variant_field) = 0;
7213 TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type);
7215 TYPE_LENGTH (rtype) -= TYPE_LENGTH (TYPE_FIELD_TYPE (type, variant_field));
7217 value_free_to_mark (mark);
7221 /* An ordinary record type (with fixed-length fields) that describes
7222 the value at (TYPE0, VALADDR, ADDRESS) [see explanation at
7223 beginning of this section]. Any necessary discriminants' values
7224 should be in DVAL, a record value; it may be NULL if the object
7225 at ADDR itself contains any necessary discriminant values.
7226 Additionally, VALADDR and ADDRESS may also be NULL if no discriminant
7227 values from the record are needed. Except in the case that DVAL,
7228 VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless
7229 unchecked) is replaced by a particular branch of the variant.
7231 NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0
7232 is questionable and may be removed. It can arise during the
7233 processing of an unconstrained-array-of-record type where all the
7234 variant branches have exactly the same size. This is because in
7235 such cases, the compiler does not bother to use the XVS convention
7236 when encoding the record. I am currently dubious of this
7237 shortcut and suspect the compiler should be altered. FIXME. */
7239 static struct type *
7240 to_fixed_record_type (struct type *type0, const gdb_byte *valaddr,
7241 CORE_ADDR address, struct value *dval)
7243 struct type *templ_type;
7245 if (TYPE_FLAGS (type0) & TYPE_FLAG_FIXED_INSTANCE)
7248 templ_type = dynamic_template_type (type0);
7250 if (templ_type != NULL)
7251 return template_to_fixed_record_type (templ_type, valaddr, address, dval);
7252 else if (variant_field_index (type0) >= 0)
7254 if (dval == NULL && valaddr == NULL && address == 0)
7256 return to_record_with_fixed_variant_part (type0, valaddr, address,
7261 TYPE_FLAGS (type0) |= TYPE_FLAG_FIXED_INSTANCE;
7267 /* An ordinary record type (with fixed-length fields) that describes
7268 the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a
7269 union type. Any necessary discriminants' values should be in DVAL,
7270 a record value. That is, this routine selects the appropriate
7271 branch of the union at ADDR according to the discriminant value
7272 indicated in the union's type name. */
7274 static struct type *
7275 to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr,
7276 CORE_ADDR address, struct value *dval)
7279 struct type *templ_type;
7280 struct type *var_type;
7282 if (TYPE_CODE (var_type0) == TYPE_CODE_PTR)
7283 var_type = TYPE_TARGET_TYPE (var_type0);
7285 var_type = var_type0;
7287 templ_type = ada_find_parallel_type (var_type, "___XVU");
7289 if (templ_type != NULL)
7290 var_type = templ_type;
7293 ada_which_variant_applies (var_type,
7294 value_type (dval), value_contents (dval));
7297 return empty_record (TYPE_OBJFILE (var_type));
7298 else if (is_dynamic_field (var_type, which))
7299 return to_fixed_record_type
7300 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (var_type, which)),
7301 valaddr, address, dval);
7302 else if (variant_field_index (TYPE_FIELD_TYPE (var_type, which)) >= 0)
7304 to_fixed_record_type
7305 (TYPE_FIELD_TYPE (var_type, which), valaddr, address, dval);
7307 return TYPE_FIELD_TYPE (var_type, which);
7310 /* Assuming that TYPE0 is an array type describing the type of a value
7311 at ADDR, and that DVAL describes a record containing any
7312 discriminants used in TYPE0, returns a type for the value that
7313 contains no dynamic components (that is, no components whose sizes
7314 are determined by run-time quantities). Unless IGNORE_TOO_BIG is
7315 true, gives an error message if the resulting type's size is over
7318 static struct type *
7319 to_fixed_array_type (struct type *type0, struct value *dval,
7322 struct type *index_type_desc;
7323 struct type *result;
7325 if (ada_is_packed_array_type (type0) /* revisit? */
7326 || (TYPE_FLAGS (type0) & TYPE_FLAG_FIXED_INSTANCE))
7329 index_type_desc = ada_find_parallel_type (type0, "___XA");
7330 if (index_type_desc == NULL)
7332 struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0));
7333 /* NOTE: elt_type---the fixed version of elt_type0---should never
7334 depend on the contents of the array in properly constructed
7336 /* Create a fixed version of the array element type.
7337 We're not providing the address of an element here,
7338 and thus the actual object value cannot be inspected to do
7339 the conversion. This should not be a problem, since arrays of
7340 unconstrained objects are not allowed. In particular, all
7341 the elements of an array of a tagged type should all be of
7342 the same type specified in the debugging info. No need to
7343 consult the object tag. */
7344 struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1);
7346 if (elt_type0 == elt_type)
7349 result = create_array_type (alloc_type (TYPE_OBJFILE (type0)),
7350 elt_type, TYPE_INDEX_TYPE (type0));
7355 struct type *elt_type0;
7358 for (i = TYPE_NFIELDS (index_type_desc); i > 0; i -= 1)
7359 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
7361 /* NOTE: result---the fixed version of elt_type0---should never
7362 depend on the contents of the array in properly constructed
7364 /* Create a fixed version of the array element type.
7365 We're not providing the address of an element here,
7366 and thus the actual object value cannot be inspected to do
7367 the conversion. This should not be a problem, since arrays of
7368 unconstrained objects are not allowed. In particular, all
7369 the elements of an array of a tagged type should all be of
7370 the same type specified in the debugging info. No need to
7371 consult the object tag. */
7373 ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1);
7374 for (i = TYPE_NFIELDS (index_type_desc) - 1; i >= 0; i -= 1)
7376 struct type *range_type =
7377 to_fixed_range_type (TYPE_FIELD_NAME (index_type_desc, i),
7378 dval, TYPE_OBJFILE (type0));
7379 result = create_array_type (alloc_type (TYPE_OBJFILE (type0)),
7380 result, range_type);
7382 if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit)
7383 error (_("array type with dynamic size is larger than varsize-limit"));
7386 TYPE_FLAGS (result) |= TYPE_FLAG_FIXED_INSTANCE;
7391 /* A standard type (containing no dynamically sized components)
7392 corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS)
7393 DVAL describes a record containing any discriminants used in TYPE0,
7394 and may be NULL if there are none, or if the object of type TYPE at
7395 ADDRESS or in VALADDR contains these discriminants.
7397 If CHECK_TAG is not null, in the case of tagged types, this function
7398 attempts to locate the object's tag and use it to compute the actual
7399 type. However, when ADDRESS is null, we cannot use it to determine the
7400 location of the tag, and therefore compute the tagged type's actual type.
7401 So we return the tagged type without consulting the tag. */
7403 static struct type *
7404 ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr,
7405 CORE_ADDR address, struct value *dval, int check_tag)
7407 type = ada_check_typedef (type);
7408 switch (TYPE_CODE (type))
7412 case TYPE_CODE_STRUCT:
7414 struct type *static_type = to_static_fixed_type (type);
7415 struct type *fixed_record_type =
7416 to_fixed_record_type (type, valaddr, address, NULL);
7417 /* If STATIC_TYPE is a tagged type and we know the object's address,
7418 then we can determine its tag, and compute the object's actual
7419 type from there. Note that we have to use the fixed record
7420 type (the parent part of the record may have dynamic fields
7421 and the way the location of _tag is expressed may depend on
7424 if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0))
7426 struct type *real_type =
7427 type_from_tag (value_tag_from_contents_and_address
7431 if (real_type != NULL)
7432 return to_fixed_record_type (real_type, valaddr, address, NULL);
7434 return fixed_record_type;
7436 case TYPE_CODE_ARRAY:
7437 return to_fixed_array_type (type, dval, 1);
7438 case TYPE_CODE_UNION:
7442 return to_fixed_variant_branch_type (type, valaddr, address, dval);
7446 /* The same as ada_to_fixed_type_1, except that it preserves the type
7447 if it is a TYPE_CODE_TYPEDEF of a type that is already fixed.
7448 ada_to_fixed_type_1 would return the type referenced by TYPE. */
7451 ada_to_fixed_type (struct type *type, const gdb_byte *valaddr,
7452 CORE_ADDR address, struct value *dval, int check_tag)
7455 struct type *fixed_type =
7456 ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag);
7458 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
7459 && TYPE_TARGET_TYPE (type) == fixed_type)
7465 /* A standard (static-sized) type corresponding as well as possible to
7466 TYPE0, but based on no runtime data. */
7468 static struct type *
7469 to_static_fixed_type (struct type *type0)
7476 if (TYPE_FLAGS (type0) & TYPE_FLAG_FIXED_INSTANCE)
7479 type0 = ada_check_typedef (type0);
7481 switch (TYPE_CODE (type0))
7485 case TYPE_CODE_STRUCT:
7486 type = dynamic_template_type (type0);
7488 return template_to_static_fixed_type (type);
7490 return template_to_static_fixed_type (type0);
7491 case TYPE_CODE_UNION:
7492 type = ada_find_parallel_type (type0, "___XVU");
7494 return template_to_static_fixed_type (type);
7496 return template_to_static_fixed_type (type0);
7500 /* A static approximation of TYPE with all type wrappers removed. */
7502 static struct type *
7503 static_unwrap_type (struct type *type)
7505 if (ada_is_aligner_type (type))
7507 struct type *type1 = TYPE_FIELD_TYPE (ada_check_typedef (type), 0);
7508 if (ada_type_name (type1) == NULL)
7509 TYPE_NAME (type1) = ada_type_name (type);
7511 return static_unwrap_type (type1);
7515 struct type *raw_real_type = ada_get_base_type (type);
7516 if (raw_real_type == type)
7519 return to_static_fixed_type (raw_real_type);
7523 /* In some cases, incomplete and private types require
7524 cross-references that are not resolved as records (for example,
7526 type FooP is access Foo;
7528 type Foo is array ...;
7529 ). In these cases, since there is no mechanism for producing
7530 cross-references to such types, we instead substitute for FooP a
7531 stub enumeration type that is nowhere resolved, and whose tag is
7532 the name of the actual type. Call these types "non-record stubs". */
7534 /* A type equivalent to TYPE that is not a non-record stub, if one
7535 exists, otherwise TYPE. */
7538 ada_check_typedef (struct type *type)
7543 CHECK_TYPEDEF (type);
7544 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
7545 || !TYPE_STUB (type)
7546 || TYPE_TAG_NAME (type) == NULL)
7550 char *name = TYPE_TAG_NAME (type);
7551 struct type *type1 = ada_find_any_type (name);
7552 return (type1 == NULL) ? type : type1;
7556 /* A value representing the data at VALADDR/ADDRESS as described by
7557 type TYPE0, but with a standard (static-sized) type that correctly
7558 describes it. If VAL0 is not NULL and TYPE0 already is a standard
7559 type, then return VAL0 [this feature is simply to avoid redundant
7560 creation of struct values]. */
7562 static struct value *
7563 ada_to_fixed_value_create (struct type *type0, CORE_ADDR address,
7566 struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1);
7567 if (type == type0 && val0 != NULL)
7570 return value_from_contents_and_address (type, 0, address);
7573 /* A value representing VAL, but with a standard (static-sized) type
7574 that correctly describes it. Does not necessarily create a new
7577 static struct value *
7578 ada_to_fixed_value (struct value *val)
7580 return ada_to_fixed_value_create (value_type (val),
7581 VALUE_ADDRESS (val) + value_offset (val),
7585 /* A value representing VAL, but with a standard (static-sized) type
7586 chosen to approximate the real type of VAL as well as possible, but
7587 without consulting any runtime values. For Ada dynamic-sized
7588 types, therefore, the type of the result is likely to be inaccurate. */
7591 ada_to_static_fixed_value (struct value *val)
7594 to_static_fixed_type (static_unwrap_type (value_type (val)));
7595 if (type == value_type (val))
7598 return coerce_unspec_val_to_type (val, type);
7604 /* Table mapping attribute numbers to names.
7605 NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */
7607 static const char *attribute_names[] = {
7625 ada_attribute_name (enum exp_opcode n)
7627 if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL)
7628 return attribute_names[n - OP_ATR_FIRST + 1];
7630 return attribute_names[0];
7633 /* Evaluate the 'POS attribute applied to ARG. */
7636 pos_atr (struct value *arg)
7638 struct value *val = coerce_ref (arg);
7639 struct type *type = value_type (val);
7641 if (!discrete_type_p (type))
7642 error (_("'POS only defined on discrete types"));
7644 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
7647 LONGEST v = value_as_long (val);
7649 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7651 if (v == TYPE_FIELD_BITPOS (type, i))
7654 error (_("enumeration value is invalid: can't find 'POS"));
7657 return value_as_long (val);
7660 static struct value *
7661 value_pos_atr (struct value *arg)
7663 return value_from_longest (builtin_type_int, pos_atr (arg));
7666 /* Evaluate the TYPE'VAL attribute applied to ARG. */
7668 static struct value *
7669 value_val_atr (struct type *type, struct value *arg)
7671 if (!discrete_type_p (type))
7672 error (_("'VAL only defined on discrete types"));
7673 if (!integer_type_p (value_type (arg)))
7674 error (_("'VAL requires integral argument"));
7676 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
7678 long pos = value_as_long (arg);
7679 if (pos < 0 || pos >= TYPE_NFIELDS (type))
7680 error (_("argument to 'VAL out of range"));
7681 return value_from_longest (type, TYPE_FIELD_BITPOS (type, pos));
7684 return value_from_longest (type, value_as_long (arg));
7690 /* True if TYPE appears to be an Ada character type.
7691 [At the moment, this is true only for Character and Wide_Character;
7692 It is a heuristic test that could stand improvement]. */
7695 ada_is_character_type (struct type *type)
7699 /* If the type code says it's a character, then assume it really is,
7700 and don't check any further. */
7701 if (TYPE_CODE (type) == TYPE_CODE_CHAR)
7704 /* Otherwise, assume it's a character type iff it is a discrete type
7705 with a known character type name. */
7706 name = ada_type_name (type);
7707 return (name != NULL
7708 && (TYPE_CODE (type) == TYPE_CODE_INT
7709 || TYPE_CODE (type) == TYPE_CODE_RANGE)
7710 && (strcmp (name, "character") == 0
7711 || strcmp (name, "wide_character") == 0
7712 || strcmp (name, "wide_wide_character") == 0
7713 || strcmp (name, "unsigned char") == 0));
7716 /* True if TYPE appears to be an Ada string type. */
7719 ada_is_string_type (struct type *type)
7721 type = ada_check_typedef (type);
7723 && TYPE_CODE (type) != TYPE_CODE_PTR
7724 && (ada_is_simple_array_type (type)
7725 || ada_is_array_descriptor_type (type))
7726 && ada_array_arity (type) == 1)
7728 struct type *elttype = ada_array_element_type (type, 1);
7730 return ada_is_character_type (elttype);
7737 /* True if TYPE is a struct type introduced by the compiler to force the
7738 alignment of a value. Such types have a single field with a
7739 distinctive name. */
7742 ada_is_aligner_type (struct type *type)
7744 type = ada_check_typedef (type);
7746 /* If we can find a parallel XVS type, then the XVS type should
7747 be used instead of this type. And hence, this is not an aligner
7749 if (ada_find_parallel_type (type, "___XVS") != NULL)
7752 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
7753 && TYPE_NFIELDS (type) == 1
7754 && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0);
7757 /* If there is an ___XVS-convention type parallel to SUBTYPE, return
7758 the parallel type. */
7761 ada_get_base_type (struct type *raw_type)
7763 struct type *real_type_namer;
7764 struct type *raw_real_type;
7766 if (raw_type == NULL || TYPE_CODE (raw_type) != TYPE_CODE_STRUCT)
7769 real_type_namer = ada_find_parallel_type (raw_type, "___XVS");
7770 if (real_type_namer == NULL
7771 || TYPE_CODE (real_type_namer) != TYPE_CODE_STRUCT
7772 || TYPE_NFIELDS (real_type_namer) != 1)
7775 raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0));
7776 if (raw_real_type == NULL)
7779 return raw_real_type;
7782 /* The type of value designated by TYPE, with all aligners removed. */
7785 ada_aligned_type (struct type *type)
7787 if (ada_is_aligner_type (type))
7788 return ada_aligned_type (TYPE_FIELD_TYPE (type, 0));
7790 return ada_get_base_type (type);
7794 /* The address of the aligned value in an object at address VALADDR
7795 having type TYPE. Assumes ada_is_aligner_type (TYPE). */
7798 ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr)
7800 if (ada_is_aligner_type (type))
7801 return ada_aligned_value_addr (TYPE_FIELD_TYPE (type, 0),
7803 TYPE_FIELD_BITPOS (type,
7804 0) / TARGET_CHAR_BIT);
7811 /* The printed representation of an enumeration literal with encoded
7812 name NAME. The value is good to the next call of ada_enum_name. */
7814 ada_enum_name (const char *name)
7816 static char *result;
7817 static size_t result_len = 0;
7820 /* First, unqualify the enumeration name:
7821 1. Search for the last '.' character. If we find one, then skip
7822 all the preceeding characters, the unqualified name starts
7823 right after that dot.
7824 2. Otherwise, we may be debugging on a target where the compiler
7825 translates dots into "__". Search forward for double underscores,
7826 but stop searching when we hit an overloading suffix, which is
7827 of the form "__" followed by digits. */
7829 tmp = strrchr (name, '.');
7834 while ((tmp = strstr (name, "__")) != NULL)
7836 if (isdigit (tmp[2]))
7846 if (name[1] == 'U' || name[1] == 'W')
7848 if (sscanf (name + 2, "%x", &v) != 1)
7854 GROW_VECT (result, result_len, 16);
7855 if (isascii (v) && isprint (v))
7856 sprintf (result, "'%c'", v);
7857 else if (name[1] == 'U')
7858 sprintf (result, "[\"%02x\"]", v);
7860 sprintf (result, "[\"%04x\"]", v);
7866 tmp = strstr (name, "__");
7868 tmp = strstr (name, "$");
7871 GROW_VECT (result, result_len, tmp - name + 1);
7872 strncpy (result, name, tmp - name);
7873 result[tmp - name] = '\0';
7881 static struct value *
7882 evaluate_subexp (struct type *expect_type, struct expression *exp, int *pos,
7885 return (*exp->language_defn->la_exp_desc->evaluate_exp)
7886 (expect_type, exp, pos, noside);
7889 /* Evaluate the subexpression of EXP starting at *POS as for
7890 evaluate_type, updating *POS to point just past the evaluated
7893 static struct value *
7894 evaluate_subexp_type (struct expression *exp, int *pos)
7896 return (*exp->language_defn->la_exp_desc->evaluate_exp)
7897 (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
7900 /* If VAL is wrapped in an aligner or subtype wrapper, return the
7903 static struct value *
7904 unwrap_value (struct value *val)
7906 struct type *type = ada_check_typedef (value_type (val));
7907 if (ada_is_aligner_type (type))
7909 struct value *v = ada_value_struct_elt (val, "F", 0);
7910 struct type *val_type = ada_check_typedef (value_type (v));
7911 if (ada_type_name (val_type) == NULL)
7912 TYPE_NAME (val_type) = ada_type_name (type);
7914 return unwrap_value (v);
7918 struct type *raw_real_type =
7919 ada_check_typedef (ada_get_base_type (type));
7921 if (type == raw_real_type)
7925 coerce_unspec_val_to_type
7926 (val, ada_to_fixed_type (raw_real_type, 0,
7927 VALUE_ADDRESS (val) + value_offset (val),
7932 static struct value *
7933 cast_to_fixed (struct type *type, struct value *arg)
7937 if (type == value_type (arg))
7939 else if (ada_is_fixed_point_type (value_type (arg)))
7940 val = ada_float_to_fixed (type,
7941 ada_fixed_to_float (value_type (arg),
7942 value_as_long (arg)));
7946 value_as_double (value_cast (builtin_type_double, value_copy (arg)));
7947 val = ada_float_to_fixed (type, argd);
7950 return value_from_longest (type, val);
7953 static struct value *
7954 cast_from_fixed_to_double (struct value *arg)
7956 DOUBLEST val = ada_fixed_to_float (value_type (arg),
7957 value_as_long (arg));
7958 return value_from_double (builtin_type_double, val);
7961 /* Coerce VAL as necessary for assignment to an lval of type TYPE, and
7962 return the converted value. */
7964 static struct value *
7965 coerce_for_assign (struct type *type, struct value *val)
7967 struct type *type2 = value_type (val);
7971 type2 = ada_check_typedef (type2);
7972 type = ada_check_typedef (type);
7974 if (TYPE_CODE (type2) == TYPE_CODE_PTR
7975 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
7977 val = ada_value_ind (val);
7978 type2 = value_type (val);
7981 if (TYPE_CODE (type2) == TYPE_CODE_ARRAY
7982 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
7984 if (TYPE_LENGTH (type2) != TYPE_LENGTH (type)
7985 || TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
7986 != TYPE_LENGTH (TYPE_TARGET_TYPE (type2)))
7987 error (_("Incompatible types in assignment"));
7988 deprecated_set_value_type (val, type);
7993 static struct value *
7994 ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
7997 struct type *type1, *type2;
8000 arg1 = coerce_ref (arg1);
8001 arg2 = coerce_ref (arg2);
8002 type1 = base_type (ada_check_typedef (value_type (arg1)));
8003 type2 = base_type (ada_check_typedef (value_type (arg2)));
8005 if (TYPE_CODE (type1) != TYPE_CODE_INT
8006 || TYPE_CODE (type2) != TYPE_CODE_INT)
8007 return value_binop (arg1, arg2, op);
8016 return value_binop (arg1, arg2, op);
8019 v2 = value_as_long (arg2);
8021 error (_("second operand of %s must not be zero."), op_string (op));
8023 if (TYPE_UNSIGNED (type1) || op == BINOP_MOD)
8024 return value_binop (arg1, arg2, op);
8026 v1 = value_as_long (arg1);
8031 if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0)
8032 v += v > 0 ? -1 : 1;
8040 /* Should not reach this point. */
8044 val = allocate_value (type1);
8045 store_unsigned_integer (value_contents_raw (val),
8046 TYPE_LENGTH (value_type (val)), v);
8051 ada_value_equal (struct value *arg1, struct value *arg2)
8053 if (ada_is_direct_array_type (value_type (arg1))
8054 || ada_is_direct_array_type (value_type (arg2)))
8056 /* Automatically dereference any array reference before
8057 we attempt to perform the comparison. */
8058 arg1 = ada_coerce_ref (arg1);
8059 arg2 = ada_coerce_ref (arg2);
8061 arg1 = ada_coerce_to_simple_array (arg1);
8062 arg2 = ada_coerce_to_simple_array (arg2);
8063 if (TYPE_CODE (value_type (arg1)) != TYPE_CODE_ARRAY
8064 || TYPE_CODE (value_type (arg2)) != TYPE_CODE_ARRAY)
8065 error (_("Attempt to compare array with non-array"));
8066 /* FIXME: The following works only for types whose
8067 representations use all bits (no padding or undefined bits)
8068 and do not have user-defined equality. */
8070 TYPE_LENGTH (value_type (arg1)) == TYPE_LENGTH (value_type (arg2))
8071 && memcmp (value_contents (arg1), value_contents (arg2),
8072 TYPE_LENGTH (value_type (arg1))) == 0;
8074 return value_equal (arg1, arg2);
8077 /* Total number of component associations in the aggregate starting at
8078 index PC in EXP. Assumes that index PC is the start of an
8082 num_component_specs (struct expression *exp, int pc)
8085 m = exp->elts[pc + 1].longconst;
8088 for (i = 0; i < m; i += 1)
8090 switch (exp->elts[pc].opcode)
8096 n += exp->elts[pc + 1].longconst;
8099 ada_evaluate_subexp (NULL, exp, &pc, EVAL_SKIP);
8104 /* Assign the result of evaluating EXP starting at *POS to the INDEXth
8105 component of LHS (a simple array or a record), updating *POS past
8106 the expression, assuming that LHS is contained in CONTAINER. Does
8107 not modify the inferior's memory, nor does it modify LHS (unless
8108 LHS == CONTAINER). */
8111 assign_component (struct value *container, struct value *lhs, LONGEST index,
8112 struct expression *exp, int *pos)
8114 struct value *mark = value_mark ();
8116 if (TYPE_CODE (value_type (lhs)) == TYPE_CODE_ARRAY)
8118 struct value *index_val = value_from_longest (builtin_type_int, index);
8119 elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val));
8123 elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
8124 elt = ada_to_fixed_value (unwrap_value (elt));
8127 if (exp->elts[*pos].opcode == OP_AGGREGATE)
8128 assign_aggregate (container, elt, exp, pos, EVAL_NORMAL);
8130 value_assign_to_component (container, elt,
8131 ada_evaluate_subexp (NULL, exp, pos,
8134 value_free_to_mark (mark);
8137 /* Assuming that LHS represents an lvalue having a record or array
8138 type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment
8139 of that aggregate's value to LHS, advancing *POS past the
8140 aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an
8141 lvalue containing LHS (possibly LHS itself). Does not modify
8142 the inferior's memory, nor does it modify the contents of
8143 LHS (unless == CONTAINER). Returns the modified CONTAINER. */
8145 static struct value *
8146 assign_aggregate (struct value *container,
8147 struct value *lhs, struct expression *exp,
8148 int *pos, enum noside noside)
8150 struct type *lhs_type;
8151 int n = exp->elts[*pos+1].longconst;
8152 LONGEST low_index, high_index;
8155 int max_indices, num_indices;
8156 int is_array_aggregate;
8158 struct value *mark = value_mark ();
8161 if (noside != EVAL_NORMAL)
8164 for (i = 0; i < n; i += 1)
8165 ada_evaluate_subexp (NULL, exp, pos, noside);
8169 container = ada_coerce_ref (container);
8170 if (ada_is_direct_array_type (value_type (container)))
8171 container = ada_coerce_to_simple_array (container);
8172 lhs = ada_coerce_ref (lhs);
8173 if (!deprecated_value_modifiable (lhs))
8174 error (_("Left operand of assignment is not a modifiable lvalue."));
8176 lhs_type = value_type (lhs);
8177 if (ada_is_direct_array_type (lhs_type))
8179 lhs = ada_coerce_to_simple_array (lhs);
8180 lhs_type = value_type (lhs);
8181 low_index = TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type);
8182 high_index = TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type);
8183 is_array_aggregate = 1;
8185 else if (TYPE_CODE (lhs_type) == TYPE_CODE_STRUCT)
8188 high_index = num_visible_fields (lhs_type) - 1;
8189 is_array_aggregate = 0;
8192 error (_("Left-hand side must be array or record."));
8194 num_specs = num_component_specs (exp, *pos - 3);
8195 max_indices = 4 * num_specs + 4;
8196 indices = alloca (max_indices * sizeof (indices[0]));
8197 indices[0] = indices[1] = low_index - 1;
8198 indices[2] = indices[3] = high_index + 1;
8201 for (i = 0; i < n; i += 1)
8203 switch (exp->elts[*pos].opcode)
8206 aggregate_assign_from_choices (container, lhs, exp, pos, indices,
8207 &num_indices, max_indices,
8208 low_index, high_index);
8211 aggregate_assign_positional (container, lhs, exp, pos, indices,
8212 &num_indices, max_indices,
8213 low_index, high_index);
8217 error (_("Misplaced 'others' clause"));
8218 aggregate_assign_others (container, lhs, exp, pos, indices,
8219 num_indices, low_index, high_index);
8222 error (_("Internal error: bad aggregate clause"));
8229 /* Assign into the component of LHS indexed by the OP_POSITIONAL
8230 construct at *POS, updating *POS past the construct, given that
8231 the positions are relative to lower bound LOW, where HIGH is the
8232 upper bound. Record the position in INDICES[0 .. MAX_INDICES-1]
8233 updating *NUM_INDICES as needed. CONTAINER is as for
8234 assign_aggregate. */
8236 aggregate_assign_positional (struct value *container,
8237 struct value *lhs, struct expression *exp,
8238 int *pos, LONGEST *indices, int *num_indices,
8239 int max_indices, LONGEST low, LONGEST high)
8241 LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low;
8243 if (ind - 1 == high)
8244 warning (_("Extra components in aggregate ignored."));
8247 add_component_interval (ind, ind, indices, num_indices, max_indices);
8249 assign_component (container, lhs, ind, exp, pos);
8252 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8255 /* Assign into the components of LHS indexed by the OP_CHOICES
8256 construct at *POS, updating *POS past the construct, given that
8257 the allowable indices are LOW..HIGH. Record the indices assigned
8258 to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as
8259 needed. CONTAINER is as for assign_aggregate. */
8261 aggregate_assign_from_choices (struct value *container,
8262 struct value *lhs, struct expression *exp,
8263 int *pos, LONGEST *indices, int *num_indices,
8264 int max_indices, LONGEST low, LONGEST high)
8267 int n_choices = longest_to_int (exp->elts[*pos+1].longconst);
8268 int choice_pos, expr_pc;
8269 int is_array = ada_is_direct_array_type (value_type (lhs));
8271 choice_pos = *pos += 3;
8273 for (j = 0; j < n_choices; j += 1)
8274 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8276 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8278 for (j = 0; j < n_choices; j += 1)
8280 LONGEST lower, upper;
8281 enum exp_opcode op = exp->elts[choice_pos].opcode;
8282 if (op == OP_DISCRETE_RANGE)
8285 lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
8287 upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
8292 lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos,
8303 name = &exp->elts[choice_pos + 2].string;
8306 name = SYMBOL_NATURAL_NAME (exp->elts[choice_pos + 2].symbol);
8309 error (_("Invalid record component association."));
8311 ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP);
8313 if (! find_struct_field (name, value_type (lhs), 0,
8314 NULL, NULL, NULL, NULL, &ind))
8315 error (_("Unknown component name: %s."), name);
8316 lower = upper = ind;
8319 if (lower <= upper && (lower < low || upper > high))
8320 error (_("Index in component association out of bounds."));
8322 add_component_interval (lower, upper, indices, num_indices,
8324 while (lower <= upper)
8328 assign_component (container, lhs, lower, exp, &pos1);
8334 /* Assign the value of the expression in the OP_OTHERS construct in
8335 EXP at *POS into the components of LHS indexed from LOW .. HIGH that
8336 have not been previously assigned. The index intervals already assigned
8337 are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the
8338 OP_OTHERS clause. CONTAINER is as for assign_aggregate*/
8340 aggregate_assign_others (struct value *container,
8341 struct value *lhs, struct expression *exp,
8342 int *pos, LONGEST *indices, int num_indices,
8343 LONGEST low, LONGEST high)
8346 int expr_pc = *pos+1;
8348 for (i = 0; i < num_indices - 2; i += 2)
8351 for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1)
8355 assign_component (container, lhs, ind, exp, &pos);
8358 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8361 /* Add the interval [LOW .. HIGH] to the sorted set of intervals
8362 [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ],
8363 modifying *SIZE as needed. It is an error if *SIZE exceeds
8364 MAX_SIZE. The resulting intervals do not overlap. */
8366 add_component_interval (LONGEST low, LONGEST high,
8367 LONGEST* indices, int *size, int max_size)
8370 for (i = 0; i < *size; i += 2) {
8371 if (high >= indices[i] && low <= indices[i + 1])
8374 for (kh = i + 2; kh < *size; kh += 2)
8375 if (high < indices[kh])
8377 if (low < indices[i])
8379 indices[i + 1] = indices[kh - 1];
8380 if (high > indices[i + 1])
8381 indices[i + 1] = high;
8382 memcpy (indices + i + 2, indices + kh, *size - kh);
8383 *size -= kh - i - 2;
8386 else if (high < indices[i])
8390 if (*size == max_size)
8391 error (_("Internal error: miscounted aggregate components."));
8393 for (j = *size-1; j >= i+2; j -= 1)
8394 indices[j] = indices[j - 2];
8396 indices[i + 1] = high;
8399 /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2
8402 static struct value *
8403 ada_value_cast (struct type *type, struct value *arg2, enum noside noside)
8405 if (type == ada_check_typedef (value_type (arg2)))
8408 if (ada_is_fixed_point_type (type))
8409 return (cast_to_fixed (type, arg2));
8411 if (ada_is_fixed_point_type (value_type (arg2)))
8412 return value_cast (type, cast_from_fixed_to_double (arg2));
8414 return value_cast (type, arg2);
8417 static struct value *
8418 ada_evaluate_subexp (struct type *expect_type, struct expression *exp,
8419 int *pos, enum noside noside)
8422 int tem, tem2, tem3;
8424 struct value *arg1 = NULL, *arg2 = NULL, *arg3;
8427 struct value **argvec;
8431 op = exp->elts[pc].opcode;
8437 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
8438 arg1 = unwrap_value (arg1);
8440 /* If evaluating an OP_DOUBLE and an EXPECT_TYPE was provided,
8441 then we need to perform the conversion manually, because
8442 evaluate_subexp_standard doesn't do it. This conversion is
8443 necessary in Ada because the different kinds of float/fixed
8444 types in Ada have different representations.
8446 Similarly, we need to perform the conversion from OP_LONG
8448 if ((op == OP_DOUBLE || op == OP_LONG) && expect_type != NULL)
8449 arg1 = ada_value_cast (expect_type, arg1, noside);
8455 struct value *result;
8457 result = evaluate_subexp_standard (expect_type, exp, pos, noside);
8458 /* The result type will have code OP_STRING, bashed there from
8459 OP_ARRAY. Bash it back. */
8460 if (TYPE_CODE (value_type (result)) == TYPE_CODE_STRING)
8461 TYPE_CODE (value_type (result)) = TYPE_CODE_ARRAY;
8467 type = exp->elts[pc + 1].type;
8468 arg1 = evaluate_subexp (type, exp, pos, noside);
8469 if (noside == EVAL_SKIP)
8471 arg1 = ada_value_cast (type, arg1, noside);
8476 type = exp->elts[pc + 1].type;
8477 return ada_evaluate_subexp (type, exp, pos, noside);
8480 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8481 if (exp->elts[*pos].opcode == OP_AGGREGATE)
8483 arg1 = assign_aggregate (arg1, arg1, exp, pos, noside);
8484 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
8486 return ada_value_assign (arg1, arg1);
8488 /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
8489 except if the lhs of our assignment is a convenience variable.
8490 In the case of assigning to a convenience variable, the lhs
8491 should be exactly the result of the evaluation of the rhs. */
8492 type = value_type (arg1);
8493 if (VALUE_LVAL (arg1) == lval_internalvar)
8495 arg2 = evaluate_subexp (type, exp, pos, noside);
8496 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
8498 if (ada_is_fixed_point_type (value_type (arg1)))
8499 arg2 = cast_to_fixed (value_type (arg1), arg2);
8500 else if (ada_is_fixed_point_type (value_type (arg2)))
8502 (_("Fixed-point values must be assigned to fixed-point variables"));
8504 arg2 = coerce_for_assign (value_type (arg1), arg2);
8505 return ada_value_assign (arg1, arg2);
8508 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
8509 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
8510 if (noside == EVAL_SKIP)
8512 if ((ada_is_fixed_point_type (value_type (arg1))
8513 || ada_is_fixed_point_type (value_type (arg2)))
8514 && value_type (arg1) != value_type (arg2))
8515 error (_("Operands of fixed-point addition must have the same type"));
8516 /* Do the addition, and cast the result to the type of the first
8517 argument. We cannot cast the result to a reference type, so if
8518 ARG1 is a reference type, find its underlying type. */
8519 type = value_type (arg1);
8520 while (TYPE_CODE (type) == TYPE_CODE_REF)
8521 type = TYPE_TARGET_TYPE (type);
8522 return value_cast (type, value_add (arg1, arg2));
8525 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
8526 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
8527 if (noside == EVAL_SKIP)
8529 if ((ada_is_fixed_point_type (value_type (arg1))
8530 || ada_is_fixed_point_type (value_type (arg2)))
8531 && value_type (arg1) != value_type (arg2))
8532 error (_("Operands of fixed-point subtraction must have the same type"));
8533 /* Do the substraction, and cast the result to the type of the first
8534 argument. We cannot cast the result to a reference type, so if
8535 ARG1 is a reference type, find its underlying type. */
8536 type = value_type (arg1);
8537 while (TYPE_CODE (type) == TYPE_CODE_REF)
8538 type = TYPE_TARGET_TYPE (type);
8539 return value_cast (type, value_sub (arg1, arg2));
8543 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8544 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8545 if (noside == EVAL_SKIP)
8547 else if (noside == EVAL_AVOID_SIDE_EFFECTS
8548 && (op == BINOP_DIV || op == BINOP_REM || op == BINOP_MOD))
8549 return value_zero (value_type (arg1), not_lval);
8552 if (ada_is_fixed_point_type (value_type (arg1)))
8553 arg1 = cast_from_fixed_to_double (arg1);
8554 if (ada_is_fixed_point_type (value_type (arg2)))
8555 arg2 = cast_from_fixed_to_double (arg2);
8556 return ada_value_binop (arg1, arg2, op);
8561 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8562 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8563 if (noside == EVAL_SKIP)
8565 else if (noside == EVAL_AVOID_SIDE_EFFECTS
8566 && (op == BINOP_DIV || op == BINOP_REM || op == BINOP_MOD))
8567 return value_zero (value_type (arg1), not_lval);
8569 return ada_value_binop (arg1, arg2, op);
8572 case BINOP_NOTEQUAL:
8573 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8574 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
8575 if (noside == EVAL_SKIP)
8577 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8580 tem = ada_value_equal (arg1, arg2);
8581 if (op == BINOP_NOTEQUAL)
8583 return value_from_longest (LA_BOOL_TYPE, (LONGEST) tem);
8586 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8587 if (noside == EVAL_SKIP)
8589 else if (ada_is_fixed_point_type (value_type (arg1)))
8590 return value_cast (value_type (arg1), value_neg (arg1));
8592 return value_neg (arg1);
8594 case BINOP_LOGICAL_AND:
8595 case BINOP_LOGICAL_OR:
8596 case UNOP_LOGICAL_NOT:
8601 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
8602 return value_cast (LA_BOOL_TYPE, val);
8605 case BINOP_BITWISE_AND:
8606 case BINOP_BITWISE_IOR:
8607 case BINOP_BITWISE_XOR:
8611 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
8613 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
8615 return value_cast (value_type (arg1), val);
8621 /* Tagged types are a little special in the fact that the real type
8622 is dynamic and can only be determined by inspecting the object
8623 value. So even if we're support to do an EVAL_AVOID_SIDE_EFFECTS
8624 evaluation, we force an EVAL_NORMAL evaluation for tagged types. */
8625 if (noside == EVAL_AVOID_SIDE_EFFECTS
8626 && ada_is_tagged_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol), 1))
8627 noside = EVAL_NORMAL;
8629 if (noside == EVAL_SKIP)
8634 else if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
8635 /* Only encountered when an unresolved symbol occurs in a
8636 context other than a function call, in which case, it is
8638 error (_("Unexpected unresolved symbol, %s, during evaluation"),
8639 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
8640 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
8644 (to_static_fixed_type
8645 (static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol))),
8651 unwrap_value (evaluate_subexp_standard
8652 (expect_type, exp, pos, noside));
8653 return ada_to_fixed_value (arg1);
8659 /* Allocate arg vector, including space for the function to be
8660 called in argvec[0] and a terminating NULL. */
8661 nargs = longest_to_int (exp->elts[pc + 1].longconst);
8663 (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
8665 if (exp->elts[*pos].opcode == OP_VAR_VALUE
8666 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
8667 error (_("Unexpected unresolved symbol, %s, during evaluation"),
8668 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
8671 for (tem = 0; tem <= nargs; tem += 1)
8672 argvec[tem] = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8675 if (noside == EVAL_SKIP)
8679 if (ada_is_packed_array_type (desc_base_type (value_type (argvec[0]))))
8680 argvec[0] = ada_coerce_to_simple_array (argvec[0]);
8681 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_REF
8682 || (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
8683 && VALUE_LVAL (argvec[0]) == lval_memory))
8684 argvec[0] = value_addr (argvec[0]);
8686 type = ada_check_typedef (value_type (argvec[0]));
8687 if (TYPE_CODE (type) == TYPE_CODE_PTR)
8689 switch (TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type))))
8691 case TYPE_CODE_FUNC:
8692 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
8694 case TYPE_CODE_ARRAY:
8696 case TYPE_CODE_STRUCT:
8697 if (noside != EVAL_AVOID_SIDE_EFFECTS)
8698 argvec[0] = ada_value_ind (argvec[0]);
8699 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
8702 error (_("cannot subscript or call something of type `%s'"),
8703 ada_type_name (value_type (argvec[0])));
8708 switch (TYPE_CODE (type))
8710 case TYPE_CODE_FUNC:
8711 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8712 return allocate_value (TYPE_TARGET_TYPE (type));
8713 return call_function_by_hand (argvec[0], nargs, argvec + 1);
8714 case TYPE_CODE_STRUCT:
8718 arity = ada_array_arity (type);
8719 type = ada_array_element_type (type, nargs);
8721 error (_("cannot subscript or call a record"));
8723 error (_("wrong number of subscripts; expecting %d"), arity);
8724 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8725 return value_zero (ada_aligned_type (type), lval_memory);
8727 unwrap_value (ada_value_subscript
8728 (argvec[0], nargs, argvec + 1));
8730 case TYPE_CODE_ARRAY:
8731 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8733 type = ada_array_element_type (type, nargs);
8735 error (_("element type of array unknown"));
8737 return value_zero (ada_aligned_type (type), lval_memory);
8740 unwrap_value (ada_value_subscript
8741 (ada_coerce_to_simple_array (argvec[0]),
8742 nargs, argvec + 1));
8743 case TYPE_CODE_PTR: /* Pointer to array */
8744 type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1);
8745 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8747 type = ada_array_element_type (type, nargs);
8749 error (_("element type of array unknown"));
8751 return value_zero (ada_aligned_type (type), lval_memory);
8754 unwrap_value (ada_value_ptr_subscript (argvec[0], type,
8755 nargs, argvec + 1));
8758 error (_("Attempt to index or call something other than an "
8759 "array or function"));
8764 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8765 struct value *low_bound_val =
8766 evaluate_subexp (NULL_TYPE, exp, pos, noside);
8767 struct value *high_bound_val =
8768 evaluate_subexp (NULL_TYPE, exp, pos, noside);
8771 low_bound_val = coerce_ref (low_bound_val);
8772 high_bound_val = coerce_ref (high_bound_val);
8773 low_bound = pos_atr (low_bound_val);
8774 high_bound = pos_atr (high_bound_val);
8776 if (noside == EVAL_SKIP)
8779 /* If this is a reference to an aligner type, then remove all
8781 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
8782 && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array))))
8783 TYPE_TARGET_TYPE (value_type (array)) =
8784 ada_aligned_type (TYPE_TARGET_TYPE (value_type (array)));
8786 if (ada_is_packed_array_type (value_type (array)))
8787 error (_("cannot slice a packed array"));
8789 /* If this is a reference to an array or an array lvalue,
8790 convert to a pointer. */
8791 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
8792 || (TYPE_CODE (value_type (array)) == TYPE_CODE_ARRAY
8793 && VALUE_LVAL (array) == lval_memory))
8794 array = value_addr (array);
8796 if (noside == EVAL_AVOID_SIDE_EFFECTS
8797 && ada_is_array_descriptor_type (ada_check_typedef
8798 (value_type (array))))
8799 return empty_array (ada_type_of_array (array, 0), low_bound);
8801 array = ada_coerce_to_simple_array_ptr (array);
8803 /* If we have more than one level of pointer indirection,
8804 dereference the value until we get only one level. */
8805 while (TYPE_CODE (value_type (array)) == TYPE_CODE_PTR
8806 && (TYPE_CODE (TYPE_TARGET_TYPE (value_type (array)))
8808 array = value_ind (array);
8810 /* Make sure we really do have an array type before going further,
8811 to avoid a SEGV when trying to get the index type or the target
8812 type later down the road if the debug info generated by
8813 the compiler is incorrect or incomplete. */
8814 if (!ada_is_simple_array_type (value_type (array)))
8815 error (_("cannot take slice of non-array"));
8817 if (TYPE_CODE (value_type (array)) == TYPE_CODE_PTR)
8819 if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS)
8820 return empty_array (TYPE_TARGET_TYPE (value_type (array)),
8824 struct type *arr_type0 =
8825 to_fixed_array_type (TYPE_TARGET_TYPE (value_type (array)),
8827 return ada_value_slice_ptr (array, arr_type0,
8828 longest_to_int (low_bound),
8829 longest_to_int (high_bound));
8832 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
8834 else if (high_bound < low_bound)
8835 return empty_array (value_type (array), low_bound);
8837 return ada_value_slice (array, longest_to_int (low_bound),
8838 longest_to_int (high_bound));
8843 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8844 type = exp->elts[pc + 1].type;
8846 if (noside == EVAL_SKIP)
8849 switch (TYPE_CODE (type))
8852 lim_warning (_("Membership test incompletely implemented; "
8853 "always returns true"));
8854 return value_from_longest (builtin_type_int, (LONGEST) 1);
8856 case TYPE_CODE_RANGE:
8857 arg2 = value_from_longest (builtin_type_int, TYPE_LOW_BOUND (type));
8858 arg3 = value_from_longest (builtin_type_int,
8859 TYPE_HIGH_BOUND (type));
8861 value_from_longest (builtin_type_int,
8862 (value_less (arg1, arg3)
8863 || value_equal (arg1, arg3))
8864 && (value_less (arg2, arg1)
8865 || value_equal (arg2, arg1)));
8868 case BINOP_IN_BOUNDS:
8870 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8871 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8873 if (noside == EVAL_SKIP)
8876 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8877 return value_zero (builtin_type_int, not_lval);
8879 tem = longest_to_int (exp->elts[pc + 1].longconst);
8881 if (tem < 1 || tem > ada_array_arity (value_type (arg2)))
8882 error (_("invalid dimension number to 'range"));
8884 arg3 = ada_array_bound (arg2, tem, 1);
8885 arg2 = ada_array_bound (arg2, tem, 0);
8888 value_from_longest (builtin_type_int,
8889 (value_less (arg1, arg3)
8890 || value_equal (arg1, arg3))
8891 && (value_less (arg2, arg1)
8892 || value_equal (arg2, arg1)));
8894 case TERNOP_IN_RANGE:
8895 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8896 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8897 arg3 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8899 if (noside == EVAL_SKIP)
8903 value_from_longest (builtin_type_int,
8904 (value_less (arg1, arg3)
8905 || value_equal (arg1, arg3))
8906 && (value_less (arg2, arg1)
8907 || value_equal (arg2, arg1)));
8913 struct type *type_arg;
8914 if (exp->elts[*pos].opcode == OP_TYPE)
8916 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
8918 type_arg = exp->elts[pc + 2].type;
8922 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8926 if (exp->elts[*pos].opcode != OP_LONG)
8927 error (_("Invalid operand to '%s"), ada_attribute_name (op));
8928 tem = longest_to_int (exp->elts[*pos + 2].longconst);
8931 if (noside == EVAL_SKIP)
8934 if (type_arg == NULL)
8936 arg1 = ada_coerce_ref (arg1);
8938 if (ada_is_packed_array_type (value_type (arg1)))
8939 arg1 = ada_coerce_to_simple_array (arg1);
8941 if (tem < 1 || tem > ada_array_arity (value_type (arg1)))
8942 error (_("invalid dimension number to '%s"),
8943 ada_attribute_name (op));
8945 if (noside == EVAL_AVOID_SIDE_EFFECTS)
8947 type = ada_index_type (value_type (arg1), tem);
8950 (_("attempt to take bound of something that is not an array"));
8951 return allocate_value (type);
8956 default: /* Should never happen. */
8957 error (_("unexpected attribute encountered"));
8959 return ada_array_bound (arg1, tem, 0);
8961 return ada_array_bound (arg1, tem, 1);
8963 return ada_array_length (arg1, tem);
8966 else if (discrete_type_p (type_arg))
8968 struct type *range_type;
8969 char *name = ada_type_name (type_arg);
8971 if (name != NULL && TYPE_CODE (type_arg) != TYPE_CODE_ENUM)
8973 to_fixed_range_type (name, NULL, TYPE_OBJFILE (type_arg));
8974 if (range_type == NULL)
8975 range_type = type_arg;
8979 error (_("unexpected attribute encountered"));
8981 return value_from_longest
8982 (range_type, discrete_type_low_bound (range_type));
8984 return value_from_longest
8985 (range_type, discrete_type_high_bound (range_type));
8987 error (_("the 'length attribute applies only to array types"));
8990 else if (TYPE_CODE (type_arg) == TYPE_CODE_FLT)
8991 error (_("unimplemented type attribute"));
8996 if (ada_is_packed_array_type (type_arg))
8997 type_arg = decode_packed_array_type (type_arg);
8999 if (tem < 1 || tem > ada_array_arity (type_arg))
9000 error (_("invalid dimension number to '%s"),
9001 ada_attribute_name (op));
9003 type = ada_index_type (type_arg, tem);
9006 (_("attempt to take bound of something that is not an array"));
9007 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9008 return allocate_value (type);
9013 error (_("unexpected attribute encountered"));
9015 low = ada_array_bound_from_type (type_arg, tem, 0, &type);
9016 return value_from_longest (type, low);
9018 high = ada_array_bound_from_type (type_arg, tem, 1, &type);
9019 return value_from_longest (type, high);
9021 low = ada_array_bound_from_type (type_arg, tem, 0, &type);
9022 high = ada_array_bound_from_type (type_arg, tem, 1, NULL);
9023 return value_from_longest (type, high - low + 1);
9029 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9030 if (noside == EVAL_SKIP)
9033 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9034 return value_zero (ada_tag_type (arg1), not_lval);
9036 return ada_value_tag (arg1);
9040 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
9041 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9042 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9043 if (noside == EVAL_SKIP)
9045 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9046 return value_zero (value_type (arg1), not_lval);
9048 return value_binop (arg1, arg2,
9049 op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX);
9051 case OP_ATR_MODULUS:
9053 struct type *type_arg = exp->elts[pc + 2].type;
9054 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
9056 if (noside == EVAL_SKIP)
9059 if (!ada_is_modular_type (type_arg))
9060 error (_("'modulus must be applied to modular type"));
9062 return value_from_longest (TYPE_TARGET_TYPE (type_arg),
9063 ada_modulus (type_arg));
9068 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
9069 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9070 if (noside == EVAL_SKIP)
9072 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9073 return value_zero (builtin_type_int, not_lval);
9075 return value_pos_atr (arg1);
9078 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9079 if (noside == EVAL_SKIP)
9081 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9082 return value_zero (builtin_type_int, not_lval);
9084 return value_from_longest (builtin_type_int,
9086 * TYPE_LENGTH (value_type (arg1)));
9089 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
9090 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9091 type = exp->elts[pc + 2].type;
9092 if (noside == EVAL_SKIP)
9094 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9095 return value_zero (type, not_lval);
9097 return value_val_atr (type, arg1);
9100 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9101 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9102 if (noside == EVAL_SKIP)
9104 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9105 return value_zero (value_type (arg1), not_lval);
9107 return value_binop (arg1, arg2, op);
9110 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9111 if (noside == EVAL_SKIP)
9117 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9118 if (noside == EVAL_SKIP)
9120 if (value_less (arg1, value_zero (value_type (arg1), not_lval)))
9121 return value_neg (arg1);
9126 if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_PTR)
9127 expect_type = TYPE_TARGET_TYPE (ada_check_typedef (expect_type));
9128 arg1 = evaluate_subexp (expect_type, exp, pos, noside);
9129 if (noside == EVAL_SKIP)
9131 type = ada_check_typedef (value_type (arg1));
9132 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9134 if (ada_is_array_descriptor_type (type))
9135 /* GDB allows dereferencing GNAT array descriptors. */
9137 struct type *arrType = ada_type_of_array (arg1, 0);
9138 if (arrType == NULL)
9139 error (_("Attempt to dereference null array pointer."));
9140 return value_at_lazy (arrType, 0);
9142 else if (TYPE_CODE (type) == TYPE_CODE_PTR
9143 || TYPE_CODE (type) == TYPE_CODE_REF
9144 /* In C you can dereference an array to get the 1st elt. */
9145 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
9147 type = to_static_fixed_type
9149 (ada_check_typedef (TYPE_TARGET_TYPE (type))));
9151 return value_zero (type, lval_memory);
9153 else if (TYPE_CODE (type) == TYPE_CODE_INT)
9154 /* GDB allows dereferencing an int. */
9155 return value_zero (builtin_type_int, lval_memory);
9157 error (_("Attempt to take contents of a non-pointer value."));
9159 arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */
9160 type = ada_check_typedef (value_type (arg1));
9162 if (ada_is_array_descriptor_type (type))
9163 /* GDB allows dereferencing GNAT array descriptors. */
9164 return ada_coerce_to_simple_array (arg1);
9166 return ada_value_ind (arg1);
9168 case STRUCTOP_STRUCT:
9169 tem = longest_to_int (exp->elts[pc + 1].longconst);
9170 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
9171 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9172 if (noside == EVAL_SKIP)
9174 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9176 struct type *type1 = value_type (arg1);
9177 if (ada_is_tagged_type (type1, 1))
9179 type = ada_lookup_struct_elt_type (type1,
9180 &exp->elts[pc + 2].string,
9183 /* In this case, we assume that the field COULD exist
9184 in some extension of the type. Return an object of
9185 "type" void, which will match any formal
9186 (see ada_type_match). */
9187 return value_zero (builtin_type_void, lval_memory);
9191 ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1,
9194 return value_zero (ada_aligned_type (type), lval_memory);
9198 ada_to_fixed_value (unwrap_value
9199 (ada_value_struct_elt
9200 (arg1, &exp->elts[pc + 2].string, 0)));
9202 /* The value is not supposed to be used. This is here to make it
9203 easier to accommodate expressions that contain types. */
9205 if (noside == EVAL_SKIP)
9207 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9208 return allocate_value (exp->elts[pc + 1].type);
9210 error (_("Attempt to use a type name as an expression"));
9215 case OP_DISCRETE_RANGE:
9218 if (noside == EVAL_NORMAL)
9222 error (_("Undefined name, ambiguous name, or renaming used in "
9223 "component association: %s."), &exp->elts[pc+2].string);
9225 error (_("Aggregates only allowed on the right of an assignment"));
9227 internal_error (__FILE__, __LINE__, _("aggregate apparently mangled"));
9230 ada_forward_operator_length (exp, pc, &oplen, &nargs);
9232 for (tem = 0; tem < nargs; tem += 1)
9233 ada_evaluate_subexp (NULL, exp, pos, noside);
9238 return value_from_longest (builtin_type_long, (LONGEST) 1);
9244 /* If TYPE encodes an Ada fixed-point type, return the suffix of the
9245 type name that encodes the 'small and 'delta information.
9246 Otherwise, return NULL. */
9249 fixed_type_info (struct type *type)
9251 const char *name = ada_type_name (type);
9252 enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : TYPE_CODE (type);
9254 if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL)
9256 const char *tail = strstr (name, "___XF_");
9262 else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type)
9263 return fixed_type_info (TYPE_TARGET_TYPE (type));
9268 /* Returns non-zero iff TYPE represents an Ada fixed-point type. */
9271 ada_is_fixed_point_type (struct type *type)
9273 return fixed_type_info (type) != NULL;
9276 /* Return non-zero iff TYPE represents a System.Address type. */
9279 ada_is_system_address_type (struct type *type)
9281 return (TYPE_NAME (type)
9282 && strcmp (TYPE_NAME (type), "system__address") == 0);
9285 /* Assuming that TYPE is the representation of an Ada fixed-point
9286 type, return its delta, or -1 if the type is malformed and the
9287 delta cannot be determined. */
9290 ada_delta (struct type *type)
9292 const char *encoding = fixed_type_info (type);
9295 if (sscanf (encoding, "_%ld_%ld", &num, &den) < 2)
9298 return (DOUBLEST) num / (DOUBLEST) den;
9301 /* Assuming that ada_is_fixed_point_type (TYPE), return the scaling
9302 factor ('SMALL value) associated with the type. */
9305 scaling_factor (struct type *type)
9307 const char *encoding = fixed_type_info (type);
9308 unsigned long num0, den0, num1, den1;
9311 n = sscanf (encoding, "_%lu_%lu_%lu_%lu", &num0, &den0, &num1, &den1);
9316 return (DOUBLEST) num1 / (DOUBLEST) den1;
9318 return (DOUBLEST) num0 / (DOUBLEST) den0;
9322 /* Assuming that X is the representation of a value of fixed-point
9323 type TYPE, return its floating-point equivalent. */
9326 ada_fixed_to_float (struct type *type, LONGEST x)
9328 return (DOUBLEST) x *scaling_factor (type);
9331 /* The representation of a fixed-point value of type TYPE
9332 corresponding to the value X. */
9335 ada_float_to_fixed (struct type *type, DOUBLEST x)
9337 return (LONGEST) (x / scaling_factor (type) + 0.5);
9341 /* VAX floating formats */
9343 /* Non-zero iff TYPE represents one of the special VAX floating-point
9347 ada_is_vax_floating_type (struct type *type)
9350 (ada_type_name (type) == NULL) ? 0 : strlen (ada_type_name (type));
9353 && (TYPE_CODE (type) == TYPE_CODE_INT
9354 || TYPE_CODE (type) == TYPE_CODE_RANGE)
9355 && strncmp (ada_type_name (type) + name_len - 6, "___XF", 5) == 0;
9358 /* The type of special VAX floating-point type this is, assuming
9359 ada_is_vax_floating_point. */
9362 ada_vax_float_type_suffix (struct type *type)
9364 return ada_type_name (type)[strlen (ada_type_name (type)) - 1];
9367 /* A value representing the special debugging function that outputs
9368 VAX floating-point values of the type represented by TYPE. Assumes
9369 ada_is_vax_floating_type (TYPE). */
9372 ada_vax_float_print_function (struct type *type)
9374 switch (ada_vax_float_type_suffix (type))
9377 return get_var_value ("DEBUG_STRING_F", 0);
9379 return get_var_value ("DEBUG_STRING_D", 0);
9381 return get_var_value ("DEBUG_STRING_G", 0);
9383 error (_("invalid VAX floating-point type"));
9390 /* Scan STR beginning at position K for a discriminant name, and
9391 return the value of that discriminant field of DVAL in *PX. If
9392 PNEW_K is not null, put the position of the character beyond the
9393 name scanned in *PNEW_K. Return 1 if successful; return 0 and do
9394 not alter *PX and *PNEW_K if unsuccessful. */
9397 scan_discrim_bound (char *str, int k, struct value *dval, LONGEST * px,
9400 static char *bound_buffer = NULL;
9401 static size_t bound_buffer_len = 0;
9404 struct value *bound_val;
9406 if (dval == NULL || str == NULL || str[k] == '\0')
9409 pend = strstr (str + k, "__");
9413 k += strlen (bound);
9417 GROW_VECT (bound_buffer, bound_buffer_len, pend - (str + k) + 1);
9418 bound = bound_buffer;
9419 strncpy (bound_buffer, str + k, pend - (str + k));
9420 bound[pend - (str + k)] = '\0';
9424 bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval));
9425 if (bound_val == NULL)
9428 *px = value_as_long (bound_val);
9434 /* Value of variable named NAME in the current environment. If
9435 no such variable found, then if ERR_MSG is null, returns 0, and
9436 otherwise causes an error with message ERR_MSG. */
9438 static struct value *
9439 get_var_value (char *name, char *err_msg)
9441 struct ada_symbol_info *syms;
9444 nsyms = ada_lookup_symbol_list (name, get_selected_block (0), VAR_DOMAIN,
9449 if (err_msg == NULL)
9452 error (("%s"), err_msg);
9455 return value_of_variable (syms[0].sym, syms[0].block);
9458 /* Value of integer variable named NAME in the current environment. If
9459 no such variable found, returns 0, and sets *FLAG to 0. If
9460 successful, sets *FLAG to 1. */
9463 get_int_var_value (char *name, int *flag)
9465 struct value *var_val = get_var_value (name, 0);
9477 return value_as_long (var_val);
9482 /* Return a range type whose base type is that of the range type named
9483 NAME in the current environment, and whose bounds are calculated
9484 from NAME according to the GNAT range encoding conventions.
9485 Extract discriminant values, if needed, from DVAL. If a new type
9486 must be created, allocate in OBJFILE's space. The bounds
9487 information, in general, is encoded in NAME, the base type given in
9488 the named range type. */
9490 static struct type *
9491 to_fixed_range_type (char *name, struct value *dval, struct objfile *objfile)
9493 struct type *raw_type = ada_find_any_type (name);
9494 struct type *base_type;
9497 if (raw_type == NULL)
9498 base_type = builtin_type_int;
9499 else if (TYPE_CODE (raw_type) == TYPE_CODE_RANGE)
9500 base_type = TYPE_TARGET_TYPE (raw_type);
9502 base_type = raw_type;
9504 subtype_info = strstr (name, "___XD");
9505 if (subtype_info == NULL)
9507 LONGEST L = discrete_type_low_bound (raw_type);
9508 LONGEST U = discrete_type_high_bound (raw_type);
9509 if (L < INT_MIN || U > INT_MAX)
9512 return create_range_type (alloc_type (objfile), raw_type,
9513 discrete_type_low_bound (raw_type),
9514 discrete_type_high_bound (raw_type));
9518 static char *name_buf = NULL;
9519 static size_t name_len = 0;
9520 int prefix_len = subtype_info - name;
9526 GROW_VECT (name_buf, name_len, prefix_len + 5);
9527 strncpy (name_buf, name, prefix_len);
9528 name_buf[prefix_len] = '\0';
9531 bounds_str = strchr (subtype_info, '_');
9534 if (*subtype_info == 'L')
9536 if (!ada_scan_number (bounds_str, n, &L, &n)
9537 && !scan_discrim_bound (bounds_str, n, dval, &L, &n))
9539 if (bounds_str[n] == '_')
9541 else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */
9548 strcpy (name_buf + prefix_len, "___L");
9549 L = get_int_var_value (name_buf, &ok);
9552 lim_warning (_("Unknown lower bound, using 1."));
9557 if (*subtype_info == 'U')
9559 if (!ada_scan_number (bounds_str, n, &U, &n)
9560 && !scan_discrim_bound (bounds_str, n, dval, &U, &n))
9566 strcpy (name_buf + prefix_len, "___U");
9567 U = get_int_var_value (name_buf, &ok);
9570 lim_warning (_("Unknown upper bound, using %ld."), (long) L);
9575 if (objfile == NULL)
9576 objfile = TYPE_OBJFILE (base_type);
9577 type = create_range_type (alloc_type (objfile), base_type, L, U);
9578 TYPE_NAME (type) = name;
9583 /* True iff NAME is the name of a range type. */
9586 ada_is_range_type_name (const char *name)
9588 return (name != NULL && strstr (name, "___XD"));
9594 /* True iff TYPE is an Ada modular type. */
9597 ada_is_modular_type (struct type *type)
9599 struct type *subranged_type = base_type (type);
9601 return (subranged_type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
9602 && TYPE_CODE (subranged_type) == TYPE_CODE_INT
9603 && TYPE_UNSIGNED (subranged_type));
9606 /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */
9609 ada_modulus (struct type * type)
9611 return (ULONGEST) TYPE_HIGH_BOUND (type) + 1;
9615 /* Ada exception catchpoint support:
9616 ---------------------------------
9618 We support 3 kinds of exception catchpoints:
9619 . catchpoints on Ada exceptions
9620 . catchpoints on unhandled Ada exceptions
9621 . catchpoints on failed assertions
9623 Exceptions raised during failed assertions, or unhandled exceptions
9624 could perfectly be caught with the general catchpoint on Ada exceptions.
9625 However, we can easily differentiate these two special cases, and having
9626 the option to distinguish these two cases from the rest can be useful
9627 to zero-in on certain situations.
9629 Exception catchpoints are a specialized form of breakpoint,
9630 since they rely on inserting breakpoints inside known routines
9631 of the GNAT runtime. The implementation therefore uses a standard
9632 breakpoint structure of the BP_BREAKPOINT type, but with its own set
9635 Support in the runtime for exception catchpoints have been changed
9636 a few times already, and these changes affect the implementation
9637 of these catchpoints. In order to be able to support several
9638 variants of the runtime, we use a sniffer that will determine
9639 the runtime variant used by the program being debugged.
9641 At this time, we do not support the use of conditions on Ada exception
9642 catchpoints. The COND and COND_STRING fields are therefore set
9643 to NULL (most of the time, see below).
9645 Conditions where EXP_STRING, COND, and COND_STRING are used:
9647 When a user specifies the name of a specific exception in the case
9648 of catchpoints on Ada exceptions, we store the name of that exception
9649 in the EXP_STRING. We then translate this request into an actual
9650 condition stored in COND_STRING, and then parse it into an expression
9653 /* The different types of catchpoints that we introduced for catching
9656 enum exception_catchpoint_kind
9659 ex_catch_exception_unhandled,
9663 typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void);
9665 /* A structure that describes how to support exception catchpoints
9666 for a given executable. */
9668 struct exception_support_info
9670 /* The name of the symbol to break on in order to insert
9671 a catchpoint on exceptions. */
9672 const char *catch_exception_sym;
9674 /* The name of the symbol to break on in order to insert
9675 a catchpoint on unhandled exceptions. */
9676 const char *catch_exception_unhandled_sym;
9678 /* The name of the symbol to break on in order to insert
9679 a catchpoint on failed assertions. */
9680 const char *catch_assert_sym;
9682 /* Assuming that the inferior just triggered an unhandled exception
9683 catchpoint, this function is responsible for returning the address
9684 in inferior memory where the name of that exception is stored.
9685 Return zero if the address could not be computed. */
9686 ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr;
9689 static CORE_ADDR ada_unhandled_exception_name_addr (void);
9690 static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void);
9692 /* The following exception support info structure describes how to
9693 implement exception catchpoints with the latest version of the
9694 Ada runtime (as of 2007-03-06). */
9696 static const struct exception_support_info default_exception_support_info =
9698 "__gnat_debug_raise_exception", /* catch_exception_sym */
9699 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
9700 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
9701 ada_unhandled_exception_name_addr
9704 /* The following exception support info structure describes how to
9705 implement exception catchpoints with a slightly older version
9706 of the Ada runtime. */
9708 static const struct exception_support_info exception_support_info_fallback =
9710 "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */
9711 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
9712 "system__assertions__raise_assert_failure", /* catch_assert_sym */
9713 ada_unhandled_exception_name_addr_from_raise
9716 /* For each executable, we sniff which exception info structure to use
9717 and cache it in the following global variable. */
9719 static const struct exception_support_info *exception_info = NULL;
9721 /* Inspect the Ada runtime and determine which exception info structure
9722 should be used to provide support for exception catchpoints.
9724 This function will always set exception_info, or raise an error. */
9727 ada_exception_support_info_sniffer (void)
9731 /* If the exception info is already known, then no need to recompute it. */
9732 if (exception_info != NULL)
9735 /* Check the latest (default) exception support info. */
9736 sym = standard_lookup (default_exception_support_info.catch_exception_sym,
9740 exception_info = &default_exception_support_info;
9744 /* Try our fallback exception suport info. */
9745 sym = standard_lookup (exception_support_info_fallback.catch_exception_sym,
9749 exception_info = &exception_support_info_fallback;
9753 /* Sometimes, it is normal for us to not be able to find the routine
9754 we are looking for. This happens when the program is linked with
9755 the shared version of the GNAT runtime, and the program has not been
9756 started yet. Inform the user of these two possible causes if
9759 if (ada_update_initial_language (language_unknown, NULL) != language_ada)
9760 error (_("Unable to insert catchpoint. Is this an Ada main program?"));
9762 /* If the symbol does not exist, then check that the program is
9763 already started, to make sure that shared libraries have been
9764 loaded. If it is not started, this may mean that the symbol is
9765 in a shared library. */
9767 if (ptid_get_pid (inferior_ptid) == 0)
9768 error (_("Unable to insert catchpoint. Try to start the program first."));
9770 /* At this point, we know that we are debugging an Ada program and
9771 that the inferior has been started, but we still are not able to
9772 find the run-time symbols. That can mean that we are in
9773 configurable run time mode, or that a-except as been optimized
9774 out by the linker... In any case, at this point it is not worth
9775 supporting this feature. */
9777 error (_("Cannot insert catchpoints in this configuration."));
9780 /* An observer of "executable_changed" events.
9781 Its role is to clear certain cached values that need to be recomputed
9782 each time a new executable is loaded by GDB. */
9785 ada_executable_changed_observer (void)
9787 /* If the executable changed, then it is possible that the Ada runtime
9788 is different. So we need to invalidate the exception support info
9790 exception_info = NULL;
9793 /* Return the name of the function at PC, NULL if could not find it.
9794 This function only checks the debugging information, not the symbol
9798 function_name_from_pc (CORE_ADDR pc)
9802 if (!find_pc_partial_function (pc, &func_name, NULL, NULL))
9808 /* True iff FRAME is very likely to be that of a function that is
9809 part of the runtime system. This is all very heuristic, but is
9810 intended to be used as advice as to what frames are uninteresting
9814 is_known_support_routine (struct frame_info *frame)
9816 struct symtab_and_line sal;
9820 /* If this code does not have any debugging information (no symtab),
9821 This cannot be any user code. */
9823 find_frame_sal (frame, &sal);
9824 if (sal.symtab == NULL)
9827 /* If there is a symtab, but the associated source file cannot be
9828 located, then assume this is not user code: Selecting a frame
9829 for which we cannot display the code would not be very helpful
9830 for the user. This should also take care of case such as VxWorks
9831 where the kernel has some debugging info provided for a few units. */
9833 if (symtab_to_fullname (sal.symtab) == NULL)
9836 /* Check the unit filename againt the Ada runtime file naming.
9837 We also check the name of the objfile against the name of some
9838 known system libraries that sometimes come with debugging info
9841 for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1)
9843 re_comp (known_runtime_file_name_patterns[i]);
9844 if (re_exec (sal.symtab->filename))
9846 if (sal.symtab->objfile != NULL
9847 && re_exec (sal.symtab->objfile->name))
9851 /* Check whether the function is a GNAT-generated entity. */
9853 func_name = function_name_from_pc (get_frame_address_in_block (frame));
9854 if (func_name == NULL)
9857 for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1)
9859 re_comp (known_auxiliary_function_name_patterns[i]);
9860 if (re_exec (func_name))
9867 /* Find the first frame that contains debugging information and that is not
9868 part of the Ada run-time, starting from FI and moving upward. */
9871 ada_find_printable_frame (struct frame_info *fi)
9873 for (; fi != NULL; fi = get_prev_frame (fi))
9875 if (!is_known_support_routine (fi))
9884 /* Assuming that the inferior just triggered an unhandled exception
9885 catchpoint, return the address in inferior memory where the name
9886 of the exception is stored.
9888 Return zero if the address could not be computed. */
9891 ada_unhandled_exception_name_addr (void)
9893 return parse_and_eval_address ("e.full_name");
9896 /* Same as ada_unhandled_exception_name_addr, except that this function
9897 should be used when the inferior uses an older version of the runtime,
9898 where the exception name needs to be extracted from a specific frame
9899 several frames up in the callstack. */
9902 ada_unhandled_exception_name_addr_from_raise (void)
9905 struct frame_info *fi;
9907 /* To determine the name of this exception, we need to select
9908 the frame corresponding to RAISE_SYM_NAME. This frame is
9909 at least 3 levels up, so we simply skip the first 3 frames
9910 without checking the name of their associated function. */
9911 fi = get_current_frame ();
9912 for (frame_level = 0; frame_level < 3; frame_level += 1)
9914 fi = get_prev_frame (fi);
9918 const char *func_name =
9919 function_name_from_pc (get_frame_address_in_block (fi));
9920 if (func_name != NULL
9921 && strcmp (func_name, exception_info->catch_exception_sym) == 0)
9922 break; /* We found the frame we were looking for... */
9923 fi = get_prev_frame (fi);
9930 return parse_and_eval_address ("id.full_name");
9933 /* Assuming the inferior just triggered an Ada exception catchpoint
9934 (of any type), return the address in inferior memory where the name
9935 of the exception is stored, if applicable.
9937 Return zero if the address could not be computed, or if not relevant. */
9940 ada_exception_name_addr_1 (enum exception_catchpoint_kind ex,
9941 struct breakpoint *b)
9945 case ex_catch_exception:
9946 return (parse_and_eval_address ("e.full_name"));
9949 case ex_catch_exception_unhandled:
9950 return exception_info->unhandled_exception_name_addr ();
9953 case ex_catch_assert:
9954 return 0; /* Exception name is not relevant in this case. */
9958 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
9962 return 0; /* Should never be reached. */
9965 /* Same as ada_exception_name_addr_1, except that it intercepts and contains
9966 any error that ada_exception_name_addr_1 might cause to be thrown.
9967 When an error is intercepted, a warning with the error message is printed,
9968 and zero is returned. */
9971 ada_exception_name_addr (enum exception_catchpoint_kind ex,
9972 struct breakpoint *b)
9974 struct gdb_exception e;
9975 CORE_ADDR result = 0;
9977 TRY_CATCH (e, RETURN_MASK_ERROR)
9979 result = ada_exception_name_addr_1 (ex, b);
9984 warning (_("failed to get exception name: %s"), e.message);
9991 /* Implement the PRINT_IT method in the breakpoint_ops structure
9992 for all exception catchpoint kinds. */
9994 static enum print_stop_action
9995 print_it_exception (enum exception_catchpoint_kind ex, struct breakpoint *b)
9997 const CORE_ADDR addr = ada_exception_name_addr (ex, b);
9998 char exception_name[256];
10002 read_memory (addr, exception_name, sizeof (exception_name) - 1);
10003 exception_name [sizeof (exception_name) - 1] = '\0';
10006 ada_find_printable_frame (get_current_frame ());
10008 annotate_catchpoint (b->number);
10011 case ex_catch_exception:
10013 printf_filtered (_("\nCatchpoint %d, %s at "),
10014 b->number, exception_name);
10016 printf_filtered (_("\nCatchpoint %d, exception at "), b->number);
10018 case ex_catch_exception_unhandled:
10020 printf_filtered (_("\nCatchpoint %d, unhandled %s at "),
10021 b->number, exception_name);
10023 printf_filtered (_("\nCatchpoint %d, unhandled exception at "),
10026 case ex_catch_assert:
10027 printf_filtered (_("\nCatchpoint %d, failed assertion at "),
10032 return PRINT_SRC_AND_LOC;
10035 /* Implement the PRINT_ONE method in the breakpoint_ops structure
10036 for all exception catchpoint kinds. */
10039 print_one_exception (enum exception_catchpoint_kind ex,
10040 struct breakpoint *b, CORE_ADDR *last_addr)
10044 annotate_field (4);
10045 ui_out_field_core_addr (uiout, "addr", b->loc->address);
10048 annotate_field (5);
10049 *last_addr = b->loc->address;
10052 case ex_catch_exception:
10053 if (b->exp_string != NULL)
10055 char *msg = xstrprintf (_("`%s' Ada exception"), b->exp_string);
10057 ui_out_field_string (uiout, "what", msg);
10061 ui_out_field_string (uiout, "what", "all Ada exceptions");
10065 case ex_catch_exception_unhandled:
10066 ui_out_field_string (uiout, "what", "unhandled Ada exceptions");
10069 case ex_catch_assert:
10070 ui_out_field_string (uiout, "what", "failed Ada assertions");
10074 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
10079 /* Implement the PRINT_MENTION method in the breakpoint_ops structure
10080 for all exception catchpoint kinds. */
10083 print_mention_exception (enum exception_catchpoint_kind ex,
10084 struct breakpoint *b)
10088 case ex_catch_exception:
10089 if (b->exp_string != NULL)
10090 printf_filtered (_("Catchpoint %d: `%s' Ada exception"),
10091 b->number, b->exp_string);
10093 printf_filtered (_("Catchpoint %d: all Ada exceptions"), b->number);
10097 case ex_catch_exception_unhandled:
10098 printf_filtered (_("Catchpoint %d: unhandled Ada exceptions"),
10102 case ex_catch_assert:
10103 printf_filtered (_("Catchpoint %d: failed Ada assertions"), b->number);
10107 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
10112 /* Virtual table for "catch exception" breakpoints. */
10114 static enum print_stop_action
10115 print_it_catch_exception (struct breakpoint *b)
10117 return print_it_exception (ex_catch_exception, b);
10121 print_one_catch_exception (struct breakpoint *b, CORE_ADDR *last_addr)
10123 print_one_exception (ex_catch_exception, b, last_addr);
10127 print_mention_catch_exception (struct breakpoint *b)
10129 print_mention_exception (ex_catch_exception, b);
10132 static struct breakpoint_ops catch_exception_breakpoint_ops =
10134 print_it_catch_exception,
10135 print_one_catch_exception,
10136 print_mention_catch_exception
10139 /* Virtual table for "catch exception unhandled" breakpoints. */
10141 static enum print_stop_action
10142 print_it_catch_exception_unhandled (struct breakpoint *b)
10144 return print_it_exception (ex_catch_exception_unhandled, b);
10148 print_one_catch_exception_unhandled (struct breakpoint *b, CORE_ADDR *last_addr)
10150 print_one_exception (ex_catch_exception_unhandled, b, last_addr);
10154 print_mention_catch_exception_unhandled (struct breakpoint *b)
10156 print_mention_exception (ex_catch_exception_unhandled, b);
10159 static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops = {
10160 print_it_catch_exception_unhandled,
10161 print_one_catch_exception_unhandled,
10162 print_mention_catch_exception_unhandled
10165 /* Virtual table for "catch assert" breakpoints. */
10167 static enum print_stop_action
10168 print_it_catch_assert (struct breakpoint *b)
10170 return print_it_exception (ex_catch_assert, b);
10174 print_one_catch_assert (struct breakpoint *b, CORE_ADDR *last_addr)
10176 print_one_exception (ex_catch_assert, b, last_addr);
10180 print_mention_catch_assert (struct breakpoint *b)
10182 print_mention_exception (ex_catch_assert, b);
10185 static struct breakpoint_ops catch_assert_breakpoint_ops = {
10186 print_it_catch_assert,
10187 print_one_catch_assert,
10188 print_mention_catch_assert
10191 /* Return non-zero if B is an Ada exception catchpoint. */
10194 ada_exception_catchpoint_p (struct breakpoint *b)
10196 return (b->ops == &catch_exception_breakpoint_ops
10197 || b->ops == &catch_exception_unhandled_breakpoint_ops
10198 || b->ops == &catch_assert_breakpoint_ops);
10201 /* Return a newly allocated copy of the first space-separated token
10202 in ARGSP, and then adjust ARGSP to point immediately after that
10205 Return NULL if ARGPS does not contain any more tokens. */
10208 ada_get_next_arg (char **argsp)
10210 char *args = *argsp;
10214 /* Skip any leading white space. */
10216 while (isspace (*args))
10219 if (args[0] == '\0')
10220 return NULL; /* No more arguments. */
10222 /* Find the end of the current argument. */
10225 while (*end != '\0' && !isspace (*end))
10228 /* Adjust ARGSP to point to the start of the next argument. */
10232 /* Make a copy of the current argument and return it. */
10234 result = xmalloc (end - args + 1);
10235 strncpy (result, args, end - args);
10236 result[end - args] = '\0';
10241 /* Split the arguments specified in a "catch exception" command.
10242 Set EX to the appropriate catchpoint type.
10243 Set EXP_STRING to the name of the specific exception if
10244 specified by the user. */
10247 catch_ada_exception_command_split (char *args,
10248 enum exception_catchpoint_kind *ex,
10251 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
10252 char *exception_name;
10254 exception_name = ada_get_next_arg (&args);
10255 make_cleanup (xfree, exception_name);
10257 /* Check that we do not have any more arguments. Anything else
10260 while (isspace (*args))
10263 if (args[0] != '\0')
10264 error (_("Junk at end of expression"));
10266 discard_cleanups (old_chain);
10268 if (exception_name == NULL)
10270 /* Catch all exceptions. */
10271 *ex = ex_catch_exception;
10272 *exp_string = NULL;
10274 else if (strcmp (exception_name, "unhandled") == 0)
10276 /* Catch unhandled exceptions. */
10277 *ex = ex_catch_exception_unhandled;
10278 *exp_string = NULL;
10282 /* Catch a specific exception. */
10283 *ex = ex_catch_exception;
10284 *exp_string = exception_name;
10288 /* Return the name of the symbol on which we should break in order to
10289 implement a catchpoint of the EX kind. */
10291 static const char *
10292 ada_exception_sym_name (enum exception_catchpoint_kind ex)
10294 gdb_assert (exception_info != NULL);
10298 case ex_catch_exception:
10299 return (exception_info->catch_exception_sym);
10301 case ex_catch_exception_unhandled:
10302 return (exception_info->catch_exception_unhandled_sym);
10304 case ex_catch_assert:
10305 return (exception_info->catch_assert_sym);
10308 internal_error (__FILE__, __LINE__,
10309 _("unexpected catchpoint kind (%d)"), ex);
10313 /* Return the breakpoint ops "virtual table" used for catchpoints
10316 static struct breakpoint_ops *
10317 ada_exception_breakpoint_ops (enum exception_catchpoint_kind ex)
10321 case ex_catch_exception:
10322 return (&catch_exception_breakpoint_ops);
10324 case ex_catch_exception_unhandled:
10325 return (&catch_exception_unhandled_breakpoint_ops);
10327 case ex_catch_assert:
10328 return (&catch_assert_breakpoint_ops);
10331 internal_error (__FILE__, __LINE__,
10332 _("unexpected catchpoint kind (%d)"), ex);
10336 /* Return the condition that will be used to match the current exception
10337 being raised with the exception that the user wants to catch. This
10338 assumes that this condition is used when the inferior just triggered
10339 an exception catchpoint.
10341 The string returned is a newly allocated string that needs to be
10342 deallocated later. */
10345 ada_exception_catchpoint_cond_string (const char *exp_string)
10347 return xstrprintf ("long_integer (e) = long_integer (&%s)", exp_string);
10350 /* Return the expression corresponding to COND_STRING evaluated at SAL. */
10352 static struct expression *
10353 ada_parse_catchpoint_condition (char *cond_string,
10354 struct symtab_and_line sal)
10356 return (parse_exp_1 (&cond_string, block_for_pc (sal.pc), 0));
10359 /* Return the symtab_and_line that should be used to insert an exception
10360 catchpoint of the TYPE kind.
10362 EX_STRING should contain the name of a specific exception
10363 that the catchpoint should catch, or NULL otherwise.
10365 The idea behind all the remaining parameters is that their names match
10366 the name of certain fields in the breakpoint structure that are used to
10367 handle exception catchpoints. This function returns the value to which
10368 these fields should be set, depending on the type of catchpoint we need
10371 If COND and COND_STRING are both non-NULL, any value they might
10372 hold will be free'ed, and then replaced by newly allocated ones.
10373 These parameters are left untouched otherwise. */
10375 static struct symtab_and_line
10376 ada_exception_sal (enum exception_catchpoint_kind ex, char *exp_string,
10377 char **addr_string, char **cond_string,
10378 struct expression **cond, struct breakpoint_ops **ops)
10380 const char *sym_name;
10381 struct symbol *sym;
10382 struct symtab_and_line sal;
10384 /* First, find out which exception support info to use. */
10385 ada_exception_support_info_sniffer ();
10387 /* Then lookup the function on which we will break in order to catch
10388 the Ada exceptions requested by the user. */
10390 sym_name = ada_exception_sym_name (ex);
10391 sym = standard_lookup (sym_name, NULL, VAR_DOMAIN);
10393 /* The symbol we're looking up is provided by a unit in the GNAT runtime
10394 that should be compiled with debugging information. As a result, we
10395 expect to find that symbol in the symtabs. If we don't find it, then
10396 the target most likely does not support Ada exceptions, or we cannot
10397 insert exception breakpoints yet, because the GNAT runtime hasn't been
10400 /* brobecker/2006-12-26: It is conceivable that the runtime was compiled
10401 in such a way that no debugging information is produced for the symbol
10402 we are looking for. In this case, we could search the minimal symbols
10403 as a fall-back mechanism. This would still be operating in degraded
10404 mode, however, as we would still be missing the debugging information
10405 that is needed in order to extract the name of the exception being
10406 raised (this name is printed in the catchpoint message, and is also
10407 used when trying to catch a specific exception). We do not handle
10408 this case for now. */
10411 error (_("Unable to break on '%s' in this configuration."), sym_name);
10413 /* Make sure that the symbol we found corresponds to a function. */
10414 if (SYMBOL_CLASS (sym) != LOC_BLOCK)
10415 error (_("Symbol \"%s\" is not a function (class = %d)"),
10416 sym_name, SYMBOL_CLASS (sym));
10418 sal = find_function_start_sal (sym, 1);
10420 /* Set ADDR_STRING. */
10422 *addr_string = xstrdup (sym_name);
10424 /* Set the COND and COND_STRING (if not NULL). */
10426 if (cond_string != NULL && cond != NULL)
10428 if (*cond_string != NULL)
10430 xfree (*cond_string);
10431 *cond_string = NULL;
10438 if (exp_string != NULL)
10440 *cond_string = ada_exception_catchpoint_cond_string (exp_string);
10441 *cond = ada_parse_catchpoint_condition (*cond_string, sal);
10446 *ops = ada_exception_breakpoint_ops (ex);
10451 /* Parse the arguments (ARGS) of the "catch exception" command.
10453 Set TYPE to the appropriate exception catchpoint type.
10454 If the user asked the catchpoint to catch only a specific
10455 exception, then save the exception name in ADDR_STRING.
10457 See ada_exception_sal for a description of all the remaining
10458 function arguments of this function. */
10460 struct symtab_and_line
10461 ada_decode_exception_location (char *args, char **addr_string,
10462 char **exp_string, char **cond_string,
10463 struct expression **cond,
10464 struct breakpoint_ops **ops)
10466 enum exception_catchpoint_kind ex;
10468 catch_ada_exception_command_split (args, &ex, exp_string);
10469 return ada_exception_sal (ex, *exp_string, addr_string, cond_string,
10473 struct symtab_and_line
10474 ada_decode_assert_location (char *args, char **addr_string,
10475 struct breakpoint_ops **ops)
10477 /* Check that no argument where provided at the end of the command. */
10481 while (isspace (*args))
10484 error (_("Junk at end of arguments."));
10487 return ada_exception_sal (ex_catch_assert, NULL, addr_string, NULL, NULL,
10492 /* Information about operators given special treatment in functions
10494 /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */
10496 #define ADA_OPERATORS \
10497 OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \
10498 OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \
10499 OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \
10500 OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \
10501 OP_DEFN (OP_ATR_LAST, 1, 2, 0) \
10502 OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \
10503 OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \
10504 OP_DEFN (OP_ATR_MAX, 1, 3, 0) \
10505 OP_DEFN (OP_ATR_MIN, 1, 3, 0) \
10506 OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \
10507 OP_DEFN (OP_ATR_POS, 1, 2, 0) \
10508 OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \
10509 OP_DEFN (OP_ATR_TAG, 1, 1, 0) \
10510 OP_DEFN (OP_ATR_VAL, 1, 2, 0) \
10511 OP_DEFN (UNOP_QUAL, 3, 1, 0) \
10512 OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \
10513 OP_DEFN (OP_OTHERS, 1, 1, 0) \
10514 OP_DEFN (OP_POSITIONAL, 3, 1, 0) \
10515 OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0)
10518 ada_operator_length (struct expression *exp, int pc, int *oplenp, int *argsp)
10520 switch (exp->elts[pc - 1].opcode)
10523 operator_length_standard (exp, pc, oplenp, argsp);
10526 #define OP_DEFN(op, len, args, binop) \
10527 case op: *oplenp = len; *argsp = args; break;
10533 *argsp = longest_to_int (exp->elts[pc - 2].longconst);
10538 *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1;
10544 ada_op_name (enum exp_opcode opcode)
10549 return op_name_standard (opcode);
10551 #define OP_DEFN(op, len, args, binop) case op: return #op;
10556 return "OP_AGGREGATE";
10558 return "OP_CHOICES";
10564 /* As for operator_length, but assumes PC is pointing at the first
10565 element of the operator, and gives meaningful results only for the
10566 Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */
10569 ada_forward_operator_length (struct expression *exp, int pc,
10570 int *oplenp, int *argsp)
10572 switch (exp->elts[pc].opcode)
10575 *oplenp = *argsp = 0;
10578 #define OP_DEFN(op, len, args, binop) \
10579 case op: *oplenp = len; *argsp = args; break;
10585 *argsp = longest_to_int (exp->elts[pc + 1].longconst);
10590 *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1;
10596 int len = longest_to_int (exp->elts[pc + 1].longconst);
10597 *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1);
10605 ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
10607 enum exp_opcode op = exp->elts[elt].opcode;
10612 ada_forward_operator_length (exp, elt, &oplen, &nargs);
10616 /* Ada attributes ('Foo). */
10619 case OP_ATR_LENGTH:
10623 case OP_ATR_MODULUS:
10630 case UNOP_IN_RANGE:
10632 /* XXX: gdb_sprint_host_address, type_sprint */
10633 fprintf_filtered (stream, _("Type @"));
10634 gdb_print_host_address (exp->elts[pc + 1].type, stream);
10635 fprintf_filtered (stream, " (");
10636 type_print (exp->elts[pc + 1].type, NULL, stream, 0);
10637 fprintf_filtered (stream, ")");
10639 case BINOP_IN_BOUNDS:
10640 fprintf_filtered (stream, " (%d)",
10641 longest_to_int (exp->elts[pc + 2].longconst));
10643 case TERNOP_IN_RANGE:
10648 case OP_DISCRETE_RANGE:
10649 case OP_POSITIONAL:
10656 char *name = &exp->elts[elt + 2].string;
10657 int len = longest_to_int (exp->elts[elt + 1].longconst);
10658 fprintf_filtered (stream, "Text: `%.*s'", len, name);
10663 return dump_subexp_body_standard (exp, stream, elt);
10667 for (i = 0; i < nargs; i += 1)
10668 elt = dump_subexp (exp, stream, elt);
10673 /* The Ada extension of print_subexp (q.v.). */
10676 ada_print_subexp (struct expression *exp, int *pos,
10677 struct ui_file *stream, enum precedence prec)
10679 int oplen, nargs, i;
10681 enum exp_opcode op = exp->elts[pc].opcode;
10683 ada_forward_operator_length (exp, pc, &oplen, &nargs);
10690 print_subexp_standard (exp, pos, stream, prec);
10694 fputs_filtered (SYMBOL_NATURAL_NAME (exp->elts[pc + 2].symbol), stream);
10697 case BINOP_IN_BOUNDS:
10698 /* XXX: sprint_subexp */
10699 print_subexp (exp, pos, stream, PREC_SUFFIX);
10700 fputs_filtered (" in ", stream);
10701 print_subexp (exp, pos, stream, PREC_SUFFIX);
10702 fputs_filtered ("'range", stream);
10703 if (exp->elts[pc + 1].longconst > 1)
10704 fprintf_filtered (stream, "(%ld)",
10705 (long) exp->elts[pc + 1].longconst);
10708 case TERNOP_IN_RANGE:
10709 if (prec >= PREC_EQUAL)
10710 fputs_filtered ("(", stream);
10711 /* XXX: sprint_subexp */
10712 print_subexp (exp, pos, stream, PREC_SUFFIX);
10713 fputs_filtered (" in ", stream);
10714 print_subexp (exp, pos, stream, PREC_EQUAL);
10715 fputs_filtered (" .. ", stream);
10716 print_subexp (exp, pos, stream, PREC_EQUAL);
10717 if (prec >= PREC_EQUAL)
10718 fputs_filtered (")", stream);
10723 case OP_ATR_LENGTH:
10727 case OP_ATR_MODULUS:
10732 if (exp->elts[*pos].opcode == OP_TYPE)
10734 if (TYPE_CODE (exp->elts[*pos + 1].type) != TYPE_CODE_VOID)
10735 LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0);
10739 print_subexp (exp, pos, stream, PREC_SUFFIX);
10740 fprintf_filtered (stream, "'%s", ada_attribute_name (op));
10744 for (tem = 1; tem < nargs; tem += 1)
10746 fputs_filtered ((tem == 1) ? " (" : ", ", stream);
10747 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
10749 fputs_filtered (")", stream);
10754 type_print (exp->elts[pc + 1].type, "", stream, 0);
10755 fputs_filtered ("'(", stream);
10756 print_subexp (exp, pos, stream, PREC_PREFIX);
10757 fputs_filtered (")", stream);
10760 case UNOP_IN_RANGE:
10761 /* XXX: sprint_subexp */
10762 print_subexp (exp, pos, stream, PREC_SUFFIX);
10763 fputs_filtered (" in ", stream);
10764 LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0);
10767 case OP_DISCRETE_RANGE:
10768 print_subexp (exp, pos, stream, PREC_SUFFIX);
10769 fputs_filtered ("..", stream);
10770 print_subexp (exp, pos, stream, PREC_SUFFIX);
10774 fputs_filtered ("others => ", stream);
10775 print_subexp (exp, pos, stream, PREC_SUFFIX);
10779 for (i = 0; i < nargs-1; i += 1)
10782 fputs_filtered ("|", stream);
10783 print_subexp (exp, pos, stream, PREC_SUFFIX);
10785 fputs_filtered (" => ", stream);
10786 print_subexp (exp, pos, stream, PREC_SUFFIX);
10789 case OP_POSITIONAL:
10790 print_subexp (exp, pos, stream, PREC_SUFFIX);
10794 fputs_filtered ("(", stream);
10795 for (i = 0; i < nargs; i += 1)
10798 fputs_filtered (", ", stream);
10799 print_subexp (exp, pos, stream, PREC_SUFFIX);
10801 fputs_filtered (")", stream);
10806 /* Table mapping opcodes into strings for printing operators
10807 and precedences of the operators. */
10809 static const struct op_print ada_op_print_tab[] = {
10810 {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
10811 {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
10812 {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
10813 {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
10814 {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
10815 {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
10816 {"=", BINOP_EQUAL, PREC_EQUAL, 0},
10817 {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
10818 {"<=", BINOP_LEQ, PREC_ORDER, 0},
10819 {">=", BINOP_GEQ, PREC_ORDER, 0},
10820 {">", BINOP_GTR, PREC_ORDER, 0},
10821 {"<", BINOP_LESS, PREC_ORDER, 0},
10822 {">>", BINOP_RSH, PREC_SHIFT, 0},
10823 {"<<", BINOP_LSH, PREC_SHIFT, 0},
10824 {"+", BINOP_ADD, PREC_ADD, 0},
10825 {"-", BINOP_SUB, PREC_ADD, 0},
10826 {"&", BINOP_CONCAT, PREC_ADD, 0},
10827 {"*", BINOP_MUL, PREC_MUL, 0},
10828 {"/", BINOP_DIV, PREC_MUL, 0},
10829 {"rem", BINOP_REM, PREC_MUL, 0},
10830 {"mod", BINOP_MOD, PREC_MUL, 0},
10831 {"**", BINOP_EXP, PREC_REPEAT, 0},
10832 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
10833 {"-", UNOP_NEG, PREC_PREFIX, 0},
10834 {"+", UNOP_PLUS, PREC_PREFIX, 0},
10835 {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
10836 {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0},
10837 {"abs ", UNOP_ABS, PREC_PREFIX, 0},
10838 {".all", UNOP_IND, PREC_SUFFIX, 1},
10839 {"'access", UNOP_ADDR, PREC_SUFFIX, 1},
10840 {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1},
10844 enum ada_primitive_types {
10845 ada_primitive_type_int,
10846 ada_primitive_type_long,
10847 ada_primitive_type_short,
10848 ada_primitive_type_char,
10849 ada_primitive_type_float,
10850 ada_primitive_type_double,
10851 ada_primitive_type_void,
10852 ada_primitive_type_long_long,
10853 ada_primitive_type_long_double,
10854 ada_primitive_type_natural,
10855 ada_primitive_type_positive,
10856 ada_primitive_type_system_address,
10857 nr_ada_primitive_types
10861 ada_language_arch_info (struct gdbarch *gdbarch,
10862 struct language_arch_info *lai)
10864 const struct builtin_type *builtin = builtin_type (gdbarch);
10865 lai->primitive_type_vector
10866 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_ada_primitive_types + 1,
10868 lai->primitive_type_vector [ada_primitive_type_int] =
10869 init_type (TYPE_CODE_INT,
10870 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
10871 0, "integer", (struct objfile *) NULL);
10872 lai->primitive_type_vector [ada_primitive_type_long] =
10873 init_type (TYPE_CODE_INT,
10874 gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT,
10875 0, "long_integer", (struct objfile *) NULL);
10876 lai->primitive_type_vector [ada_primitive_type_short] =
10877 init_type (TYPE_CODE_INT,
10878 gdbarch_short_bit (gdbarch) / TARGET_CHAR_BIT,
10879 0, "short_integer", (struct objfile *) NULL);
10880 lai->string_char_type =
10881 lai->primitive_type_vector [ada_primitive_type_char] =
10882 init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
10883 0, "character", (struct objfile *) NULL);
10884 lai->primitive_type_vector [ada_primitive_type_float] =
10885 init_type (TYPE_CODE_FLT,
10886 gdbarch_float_bit (gdbarch)/ TARGET_CHAR_BIT,
10887 0, "float", (struct objfile *) NULL);
10888 lai->primitive_type_vector [ada_primitive_type_double] =
10889 init_type (TYPE_CODE_FLT,
10890 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
10891 0, "long_float", (struct objfile *) NULL);
10892 lai->primitive_type_vector [ada_primitive_type_long_long] =
10893 init_type (TYPE_CODE_INT,
10894 gdbarch_long_long_bit (gdbarch) / TARGET_CHAR_BIT,
10895 0, "long_long_integer", (struct objfile *) NULL);
10896 lai->primitive_type_vector [ada_primitive_type_long_double] =
10897 init_type (TYPE_CODE_FLT,
10898 gdbarch_double_bit (gdbarch) / TARGET_CHAR_BIT,
10899 0, "long_long_float", (struct objfile *) NULL);
10900 lai->primitive_type_vector [ada_primitive_type_natural] =
10901 init_type (TYPE_CODE_INT,
10902 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
10903 0, "natural", (struct objfile *) NULL);
10904 lai->primitive_type_vector [ada_primitive_type_positive] =
10905 init_type (TYPE_CODE_INT,
10906 gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
10907 0, "positive", (struct objfile *) NULL);
10908 lai->primitive_type_vector [ada_primitive_type_void] = builtin->builtin_void;
10910 lai->primitive_type_vector [ada_primitive_type_system_address] =
10911 lookup_pointer_type (init_type (TYPE_CODE_VOID, 1, 0, "void",
10912 (struct objfile *) NULL));
10913 TYPE_NAME (lai->primitive_type_vector [ada_primitive_type_system_address])
10914 = "system__address";
10917 /* Language vector */
10919 /* Not really used, but needed in the ada_language_defn. */
10922 emit_char (int c, struct ui_file *stream, int quoter)
10924 ada_emit_char (c, stream, quoter, 1);
10930 warnings_issued = 0;
10931 return ada_parse ();
10934 static const struct exp_descriptor ada_exp_descriptor = {
10936 ada_operator_length,
10938 ada_dump_subexp_body,
10939 ada_evaluate_subexp
10942 const struct language_defn ada_language_defn = {
10943 "ada", /* Language name */
10947 case_sensitive_on, /* Yes, Ada is case-insensitive, but
10948 that's not quite what this means. */
10950 &ada_exp_descriptor,
10954 ada_printchar, /* Print a character constant */
10955 ada_printstr, /* Function to print string constant */
10956 emit_char, /* Function to print single char (not used) */
10957 ada_print_type, /* Print a type using appropriate syntax */
10958 ada_val_print, /* Print a value using appropriate syntax */
10959 ada_value_print, /* Print a top-level value */
10960 NULL, /* Language specific skip_trampoline */
10961 NULL, /* name_of_this */
10962 ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
10963 basic_lookup_transparent_type, /* lookup_transparent_type */
10964 ada_la_decode, /* Language specific symbol demangler */
10965 NULL, /* Language specific class_name_from_physname */
10966 ada_op_print_tab, /* expression operators for printing */
10967 0, /* c-style arrays */
10968 1, /* String lower bound */
10969 ada_get_gdb_completer_word_break_characters,
10970 ada_make_symbol_completion_list,
10971 ada_language_arch_info,
10972 ada_print_array_index,
10973 default_pass_by_reference,
10978 _initialize_ada_language (void)
10980 add_language (&ada_language_defn);
10982 varsize_limit = 65536;
10984 obstack_init (&symbol_list_obstack);
10986 decoded_names_store = htab_create_alloc
10987 (256, htab_hash_string, (int (*)(const void *, const void *)) streq,
10988 NULL, xcalloc, xfree);
10990 observer_attach_executable_changed (ada_executable_changed_observer);