1 /* Ada language support routines for GDB, the GNU debugger.
3 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_regex.h"
28 #include "expression.h"
29 #include "parser-defs.h"
35 #include "breakpoint.h"
38 #include "gdb_obstack.h"
40 #include "completer.h"
47 #include "observable.h"
49 #include "typeprint.h"
50 #include "namespace.h"
51 #include "cli/cli-style.h"
54 #include "mi/mi-common.h"
55 #include "arch-utils.h"
56 #include "cli/cli-utils.h"
57 #include "gdbsupport/function-view.h"
58 #include "gdbsupport/byte-vector.h"
61 /* Define whether or not the C operator '/' truncates towards zero for
62 differently signed operands (truncation direction is undefined in C).
63 Copied from valarith.c. */
65 #ifndef TRUNCATION_TOWARDS_ZERO
66 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
69 static struct type
*desc_base_type (struct type
*);
71 static struct type
*desc_bounds_type (struct type
*);
73 static struct value
*desc_bounds (struct value
*);
75 static int fat_pntr_bounds_bitpos (struct type
*);
77 static int fat_pntr_bounds_bitsize (struct type
*);
79 static struct type
*desc_data_target_type (struct type
*);
81 static struct value
*desc_data (struct value
*);
83 static int fat_pntr_data_bitpos (struct type
*);
85 static int fat_pntr_data_bitsize (struct type
*);
87 static struct value
*desc_one_bound (struct value
*, int, int);
89 static int desc_bound_bitpos (struct type
*, int, int);
91 static int desc_bound_bitsize (struct type
*, int, int);
93 static struct type
*desc_index_type (struct type
*, int);
95 static int desc_arity (struct type
*);
97 static int ada_type_match (struct type
*, struct type
*, int);
99 static int ada_args_match (struct symbol
*, struct value
**, int);
101 static struct value
*make_array_descriptor (struct type
*, struct value
*);
103 static void ada_add_block_symbols (struct obstack
*,
104 const struct block
*,
105 const lookup_name_info
&lookup_name
,
106 domain_enum
, struct objfile
*);
108 static void ada_add_all_symbols (struct obstack
*, const struct block
*,
109 const lookup_name_info
&lookup_name
,
110 domain_enum
, int, int *);
112 static int is_nonfunction (struct block_symbol
*, int);
114 static void add_defn_to_vec (struct obstack
*, struct symbol
*,
115 const struct block
*);
117 static int num_defns_collected (struct obstack
*);
119 static struct block_symbol
*defns_collected (struct obstack
*, int);
121 static struct value
*resolve_subexp (expression_up
*, int *, int,
123 innermost_block_tracker
*);
125 static void replace_operator_with_call (expression_up
*, int, int, int,
126 struct symbol
*, const struct block
*);
128 static int possible_user_operator_p (enum exp_opcode
, struct value
**);
130 static const char *ada_op_name (enum exp_opcode
);
132 static const char *ada_decoded_op_name (enum exp_opcode
);
134 static int numeric_type_p (struct type
*);
136 static int integer_type_p (struct type
*);
138 static int scalar_type_p (struct type
*);
140 static int discrete_type_p (struct type
*);
142 static struct type
*ada_lookup_struct_elt_type (struct type
*, const char *,
145 static struct value
*evaluate_subexp_type (struct expression
*, int *);
147 static struct type
*ada_find_parallel_type_with_name (struct type
*,
150 static int is_dynamic_field (struct type
*, int);
152 static struct type
*to_fixed_variant_branch_type (struct type
*,
154 CORE_ADDR
, struct value
*);
156 static struct type
*to_fixed_array_type (struct type
*, struct value
*, int);
158 static struct type
*to_fixed_range_type (struct type
*, struct value
*);
160 static struct type
*to_static_fixed_type (struct type
*);
161 static struct type
*static_unwrap_type (struct type
*type
);
163 static struct value
*unwrap_value (struct value
*);
165 static struct type
*constrained_packed_array_type (struct type
*, long *);
167 static struct type
*decode_constrained_packed_array_type (struct type
*);
169 static long decode_packed_array_bitsize (struct type
*);
171 static struct value
*decode_constrained_packed_array (struct value
*);
173 static int ada_is_packed_array_type (struct type
*);
175 static int ada_is_unconstrained_packed_array_type (struct type
*);
177 static struct value
*value_subscript_packed (struct value
*, int,
180 static struct value
*coerce_unspec_val_to_type (struct value
*,
183 static int lesseq_defined_than (struct symbol
*, struct symbol
*);
185 static int equiv_types (struct type
*, struct type
*);
187 static int is_name_suffix (const char *);
189 static int advance_wild_match (const char **, const char *, int);
191 static bool wild_match (const char *name
, const char *patn
);
193 static struct value
*ada_coerce_ref (struct value
*);
195 static LONGEST
pos_atr (struct value
*);
197 static struct value
*value_pos_atr (struct type
*, struct value
*);
199 static struct value
*value_val_atr (struct type
*, struct value
*);
201 static struct symbol
*standard_lookup (const char *, const struct block
*,
204 static struct value
*ada_search_struct_field (const char *, struct value
*, int,
207 static int find_struct_field (const char *, struct type
*, int,
208 struct type
**, int *, int *, int *, int *);
210 static int ada_resolve_function (struct block_symbol
*, int,
211 struct value
**, int, const char *,
214 static int ada_is_direct_array_type (struct type
*);
216 static void ada_language_arch_info (struct gdbarch
*,
217 struct language_arch_info
*);
219 static struct value
*ada_index_struct_field (int, struct value
*, int,
222 static struct value
*assign_aggregate (struct value
*, struct value
*,
226 static void aggregate_assign_from_choices (struct value
*, struct value
*,
228 int *, LONGEST
*, int *,
229 int, LONGEST
, LONGEST
);
231 static void aggregate_assign_positional (struct value
*, struct value
*,
233 int *, LONGEST
*, int *, int,
237 static void aggregate_assign_others (struct value
*, struct value
*,
239 int *, LONGEST
*, int, LONGEST
, LONGEST
);
242 static void add_component_interval (LONGEST
, LONGEST
, LONGEST
*, int *, int);
245 static struct value
*ada_evaluate_subexp (struct type
*, struct expression
*,
248 static void ada_forward_operator_length (struct expression
*, int, int *,
251 static struct type
*ada_find_any_type (const char *name
);
253 static symbol_name_matcher_ftype
*ada_get_symbol_name_matcher
254 (const lookup_name_info
&lookup_name
);
258 /* The result of a symbol lookup to be stored in our symbol cache. */
262 /* The name used to perform the lookup. */
264 /* The namespace used during the lookup. */
266 /* The symbol returned by the lookup, or NULL if no matching symbol
269 /* The block where the symbol was found, or NULL if no matching
271 const struct block
*block
;
272 /* A pointer to the next entry with the same hash. */
273 struct cache_entry
*next
;
276 /* The Ada symbol cache, used to store the result of Ada-mode symbol
277 lookups in the course of executing the user's commands.
279 The cache is implemented using a simple, fixed-sized hash.
280 The size is fixed on the grounds that there are not likely to be
281 all that many symbols looked up during any given session, regardless
282 of the size of the symbol table. If we decide to go to a resizable
283 table, let's just use the stuff from libiberty instead. */
285 #define HASH_SIZE 1009
287 struct ada_symbol_cache
289 /* An obstack used to store the entries in our cache. */
290 struct obstack cache_space
;
292 /* The root of the hash table used to implement our symbol cache. */
293 struct cache_entry
*root
[HASH_SIZE
];
296 static void ada_free_symbol_cache (struct ada_symbol_cache
*sym_cache
);
298 /* Maximum-sized dynamic type. */
299 static unsigned int varsize_limit
;
301 static const char ada_completer_word_break_characters
[] =
303 " \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
305 " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
308 /* The name of the symbol to use to get the name of the main subprogram. */
309 static const char ADA_MAIN_PROGRAM_SYMBOL_NAME
[]
310 = "__gnat_ada_main_program_name";
312 /* Limit on the number of warnings to raise per expression evaluation. */
313 static int warning_limit
= 2;
315 /* Number of warning messages issued; reset to 0 by cleanups after
316 expression evaluation. */
317 static int warnings_issued
= 0;
319 static const char *known_runtime_file_name_patterns
[] = {
320 ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
323 static const char *known_auxiliary_function_name_patterns
[] = {
324 ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
327 /* Maintenance-related settings for this module. */
329 static struct cmd_list_element
*maint_set_ada_cmdlist
;
330 static struct cmd_list_element
*maint_show_ada_cmdlist
;
332 /* The "maintenance ada set/show ignore-descriptive-type" value. */
334 static bool ada_ignore_descriptive_types_p
= false;
336 /* Inferior-specific data. */
338 /* Per-inferior data for this module. */
340 struct ada_inferior_data
342 /* The ada__tags__type_specific_data type, which is used when decoding
343 tagged types. With older versions of GNAT, this type was directly
344 accessible through a component ("tsd") in the object tag. But this
345 is no longer the case, so we cache it for each inferior. */
346 struct type
*tsd_type
= nullptr;
348 /* The exception_support_info data. This data is used to determine
349 how to implement support for Ada exception catchpoints in a given
351 const struct exception_support_info
*exception_info
= nullptr;
354 /* Our key to this module's inferior data. */
355 static const struct inferior_key
<ada_inferior_data
> ada_inferior_data
;
357 /* Return our inferior data for the given inferior (INF).
359 This function always returns a valid pointer to an allocated
360 ada_inferior_data structure. If INF's inferior data has not
361 been previously set, this functions creates a new one with all
362 fields set to zero, sets INF's inferior to it, and then returns
363 a pointer to that newly allocated ada_inferior_data. */
365 static struct ada_inferior_data
*
366 get_ada_inferior_data (struct inferior
*inf
)
368 struct ada_inferior_data
*data
;
370 data
= ada_inferior_data
.get (inf
);
372 data
= ada_inferior_data
.emplace (inf
);
377 /* Perform all necessary cleanups regarding our module's inferior data
378 that is required after the inferior INF just exited. */
381 ada_inferior_exit (struct inferior
*inf
)
383 ada_inferior_data
.clear (inf
);
387 /* program-space-specific data. */
389 /* This module's per-program-space data. */
390 struct ada_pspace_data
394 if (sym_cache
!= NULL
)
395 ada_free_symbol_cache (sym_cache
);
398 /* The Ada symbol cache. */
399 struct ada_symbol_cache
*sym_cache
= nullptr;
402 /* Key to our per-program-space data. */
403 static const struct program_space_key
<ada_pspace_data
> ada_pspace_data_handle
;
405 /* Return this module's data for the given program space (PSPACE).
406 If not is found, add a zero'ed one now.
408 This function always returns a valid object. */
410 static struct ada_pspace_data
*
411 get_ada_pspace_data (struct program_space
*pspace
)
413 struct ada_pspace_data
*data
;
415 data
= ada_pspace_data_handle
.get (pspace
);
417 data
= ada_pspace_data_handle
.emplace (pspace
);
424 /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after
425 all typedef layers have been peeled. Otherwise, return TYPE.
427 Normally, we really expect a typedef type to only have 1 typedef layer.
428 In other words, we really expect the target type of a typedef type to be
429 a non-typedef type. This is particularly true for Ada units, because
430 the language does not have a typedef vs not-typedef distinction.
431 In that respect, the Ada compiler has been trying to eliminate as many
432 typedef definitions in the debugging information, since they generally
433 do not bring any extra information (we still use typedef under certain
434 circumstances related mostly to the GNAT encoding).
436 Unfortunately, we have seen situations where the debugging information
437 generated by the compiler leads to such multiple typedef layers. For
438 instance, consider the following example with stabs:
440 .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...]
441 .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0
443 This is an error in the debugging information which causes type
444 pck__float_array___XUP to be defined twice, and the second time,
445 it is defined as a typedef of a typedef.
447 This is on the fringe of legality as far as debugging information is
448 concerned, and certainly unexpected. But it is easy to handle these
449 situations correctly, so we can afford to be lenient in this case. */
452 ada_typedef_target_type (struct type
*type
)
454 while (type
->code () == TYPE_CODE_TYPEDEF
)
455 type
= TYPE_TARGET_TYPE (type
);
459 /* Given DECODED_NAME a string holding a symbol name in its
460 decoded form (ie using the Ada dotted notation), returns
461 its unqualified name. */
464 ada_unqualified_name (const char *decoded_name
)
468 /* If the decoded name starts with '<', it means that the encoded
469 name does not follow standard naming conventions, and thus that
470 it is not your typical Ada symbol name. Trying to unqualify it
471 is therefore pointless and possibly erroneous. */
472 if (decoded_name
[0] == '<')
475 result
= strrchr (decoded_name
, '.');
477 result
++; /* Skip the dot... */
479 result
= decoded_name
;
484 /* Return a string starting with '<', followed by STR, and '>'. */
487 add_angle_brackets (const char *str
)
489 return string_printf ("<%s>", str
);
493 ada_get_gdb_completer_word_break_characters (void)
495 return ada_completer_word_break_characters
;
498 /* Print an array element index using the Ada syntax. */
501 ada_print_array_index (struct value
*index_value
, struct ui_file
*stream
,
502 const struct value_print_options
*options
)
504 LA_VALUE_PRINT (index_value
, stream
, options
);
505 fprintf_filtered (stream
, " => ");
508 /* la_watch_location_expression for Ada. */
510 static gdb::unique_xmalloc_ptr
<char>
511 ada_watch_location_expression (struct type
*type
, CORE_ADDR addr
)
513 type
= check_typedef (TYPE_TARGET_TYPE (check_typedef (type
)));
514 std::string name
= type_to_string (type
);
515 return gdb::unique_xmalloc_ptr
<char>
516 (xstrprintf ("{%s} %s", name
.c_str (), core_addr_to_string (addr
)));
519 /* Assuming V points to an array of S objects, make sure that it contains at
520 least M objects, updating V and S as necessary. */
522 #define GROW_VECT(v, s, m) \
523 if ((s) < (m)) (v) = (char *) grow_vect (v, &(s), m, sizeof *(v));
525 /* Assuming VECT points to an array of *SIZE objects of size
526 ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
527 updating *SIZE as necessary and returning the (new) array. */
530 grow_vect (void *vect
, size_t *size
, size_t min_size
, int element_size
)
532 if (*size
< min_size
)
535 if (*size
< min_size
)
537 vect
= xrealloc (vect
, *size
* element_size
);
542 /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
543 suffix of FIELD_NAME beginning "___". */
546 field_name_match (const char *field_name
, const char *target
)
548 int len
= strlen (target
);
551 (strncmp (field_name
, target
, len
) == 0
552 && (field_name
[len
] == '\0'
553 || (startswith (field_name
+ len
, "___")
554 && strcmp (field_name
+ strlen (field_name
) - 6,
559 /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to
560 a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME,
561 and return its index. This function also handles fields whose name
562 have ___ suffixes because the compiler sometimes alters their name
563 by adding such a suffix to represent fields with certain constraints.
564 If the field could not be found, return a negative number if
565 MAYBE_MISSING is set. Otherwise raise an error. */
568 ada_get_field_index (const struct type
*type
, const char *field_name
,
572 struct type
*struct_type
= check_typedef ((struct type
*) type
);
574 for (fieldno
= 0; fieldno
< TYPE_NFIELDS (struct_type
); fieldno
++)
575 if (field_name_match (TYPE_FIELD_NAME (struct_type
, fieldno
), field_name
))
579 error (_("Unable to find field %s in struct %s. Aborting"),
580 field_name
, struct_type
->name ());
585 /* The length of the prefix of NAME prior to any "___" suffix. */
588 ada_name_prefix_len (const char *name
)
594 const char *p
= strstr (name
, "___");
597 return strlen (name
);
603 /* Return non-zero if SUFFIX is a suffix of STR.
604 Return zero if STR is null. */
607 is_suffix (const char *str
, const char *suffix
)
614 len2
= strlen (suffix
);
615 return (len1
>= len2
&& strcmp (str
+ len1
- len2
, suffix
) == 0);
618 /* The contents of value VAL, treated as a value of type TYPE. The
619 result is an lval in memory if VAL is. */
621 static struct value
*
622 coerce_unspec_val_to_type (struct value
*val
, struct type
*type
)
624 type
= ada_check_typedef (type
);
625 if (value_type (val
) == type
)
629 struct value
*result
;
631 /* Make sure that the object size is not unreasonable before
632 trying to allocate some memory for it. */
633 ada_ensure_varsize_limit (type
);
636 || TYPE_LENGTH (type
) > TYPE_LENGTH (value_type (val
)))
637 result
= allocate_value_lazy (type
);
640 result
= allocate_value (type
);
641 value_contents_copy_raw (result
, 0, val
, 0, TYPE_LENGTH (type
));
643 set_value_component_location (result
, val
);
644 set_value_bitsize (result
, value_bitsize (val
));
645 set_value_bitpos (result
, value_bitpos (val
));
646 if (VALUE_LVAL (result
) == lval_memory
)
647 set_value_address (result
, value_address (val
));
652 static const gdb_byte
*
653 cond_offset_host (const gdb_byte
*valaddr
, long offset
)
658 return valaddr
+ offset
;
662 cond_offset_target (CORE_ADDR address
, long offset
)
667 return address
+ offset
;
670 /* Issue a warning (as for the definition of warning in utils.c, but
671 with exactly one argument rather than ...), unless the limit on the
672 number of warnings has passed during the evaluation of the current
675 /* FIXME: cagney/2004-10-10: This function is mimicking the behavior
676 provided by "complaint". */
677 static void lim_warning (const char *format
, ...) ATTRIBUTE_PRINTF (1, 2);
680 lim_warning (const char *format
, ...)
684 va_start (args
, format
);
685 warnings_issued
+= 1;
686 if (warnings_issued
<= warning_limit
)
687 vwarning (format
, args
);
692 /* Issue an error if the size of an object of type T is unreasonable,
693 i.e. if it would be a bad idea to allocate a value of this type in
697 ada_ensure_varsize_limit (const struct type
*type
)
699 if (TYPE_LENGTH (type
) > varsize_limit
)
700 error (_("object size is larger than varsize-limit"));
703 /* Maximum value of a SIZE-byte signed integer type. */
705 max_of_size (int size
)
707 LONGEST top_bit
= (LONGEST
) 1 << (size
* 8 - 2);
709 return top_bit
| (top_bit
- 1);
712 /* Minimum value of a SIZE-byte signed integer type. */
714 min_of_size (int size
)
716 return -max_of_size (size
) - 1;
719 /* Maximum value of a SIZE-byte unsigned integer type. */
721 umax_of_size (int size
)
723 ULONGEST top_bit
= (ULONGEST
) 1 << (size
* 8 - 1);
725 return top_bit
| (top_bit
- 1);
728 /* Maximum value of integral type T, as a signed quantity. */
730 max_of_type (struct type
*t
)
732 if (TYPE_UNSIGNED (t
))
733 return (LONGEST
) umax_of_size (TYPE_LENGTH (t
));
735 return max_of_size (TYPE_LENGTH (t
));
738 /* Minimum value of integral type T, as a signed quantity. */
740 min_of_type (struct type
*t
)
742 if (TYPE_UNSIGNED (t
))
745 return min_of_size (TYPE_LENGTH (t
));
748 /* The largest value in the domain of TYPE, a discrete type, as an integer. */
750 ada_discrete_type_high_bound (struct type
*type
)
752 type
= resolve_dynamic_type (type
, {}, 0);
753 switch (type
->code ())
755 case TYPE_CODE_RANGE
:
756 return TYPE_HIGH_BOUND (type
);
758 return TYPE_FIELD_ENUMVAL (type
, TYPE_NFIELDS (type
) - 1);
763 return max_of_type (type
);
765 error (_("Unexpected type in ada_discrete_type_high_bound."));
769 /* The smallest value in the domain of TYPE, a discrete type, as an integer. */
771 ada_discrete_type_low_bound (struct type
*type
)
773 type
= resolve_dynamic_type (type
, {}, 0);
774 switch (type
->code ())
776 case TYPE_CODE_RANGE
:
777 return TYPE_LOW_BOUND (type
);
779 return TYPE_FIELD_ENUMVAL (type
, 0);
784 return min_of_type (type
);
786 error (_("Unexpected type in ada_discrete_type_low_bound."));
790 /* The identity on non-range types. For range types, the underlying
791 non-range scalar type. */
794 get_base_type (struct type
*type
)
796 while (type
!= NULL
&& type
->code () == TYPE_CODE_RANGE
)
798 if (type
== TYPE_TARGET_TYPE (type
) || TYPE_TARGET_TYPE (type
) == NULL
)
800 type
= TYPE_TARGET_TYPE (type
);
805 /* Return a decoded version of the given VALUE. This means returning
806 a value whose type is obtained by applying all the GNAT-specific
807 encodings, making the resulting type a static but standard description
808 of the initial type. */
811 ada_get_decoded_value (struct value
*value
)
813 struct type
*type
= ada_check_typedef (value_type (value
));
815 if (ada_is_array_descriptor_type (type
)
816 || (ada_is_constrained_packed_array_type (type
)
817 && type
->code () != TYPE_CODE_PTR
))
819 if (type
->code () == TYPE_CODE_TYPEDEF
) /* array access type. */
820 value
= ada_coerce_to_simple_array_ptr (value
);
822 value
= ada_coerce_to_simple_array (value
);
825 value
= ada_to_fixed_value (value
);
830 /* Same as ada_get_decoded_value, but with the given TYPE.
831 Because there is no associated actual value for this type,
832 the resulting type might be a best-effort approximation in
833 the case of dynamic types. */
836 ada_get_decoded_type (struct type
*type
)
838 type
= to_static_fixed_type (type
);
839 if (ada_is_constrained_packed_array_type (type
))
840 type
= ada_coerce_to_simple_array_type (type
);
846 /* Language Selection */
848 /* If the main program is in Ada, return language_ada, otherwise return LANG
849 (the main program is in Ada iif the adainit symbol is found). */
852 ada_update_initial_language (enum language lang
)
854 if (lookup_minimal_symbol ("adainit", NULL
, NULL
).minsym
!= NULL
)
860 /* If the main procedure is written in Ada, then return its name.
861 The result is good until the next call. Return NULL if the main
862 procedure doesn't appear to be in Ada. */
867 struct bound_minimal_symbol msym
;
868 static gdb::unique_xmalloc_ptr
<char> main_program_name
;
870 /* For Ada, the name of the main procedure is stored in a specific
871 string constant, generated by the binder. Look for that symbol,
872 extract its address, and then read that string. If we didn't find
873 that string, then most probably the main procedure is not written
875 msym
= lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME
, NULL
, NULL
);
877 if (msym
.minsym
!= NULL
)
879 CORE_ADDR main_program_name_addr
;
882 main_program_name_addr
= BMSYMBOL_VALUE_ADDRESS (msym
);
883 if (main_program_name_addr
== 0)
884 error (_("Invalid address for Ada main program name."));
886 target_read_string (main_program_name_addr
, &main_program_name
,
891 return main_program_name
.get ();
894 /* The main procedure doesn't seem to be in Ada. */
900 /* Table of Ada operators and their GNAT-encoded names. Last entry is pair
903 const struct ada_opname_map ada_opname_table
[] = {
904 {"Oadd", "\"+\"", BINOP_ADD
},
905 {"Osubtract", "\"-\"", BINOP_SUB
},
906 {"Omultiply", "\"*\"", BINOP_MUL
},
907 {"Odivide", "\"/\"", BINOP_DIV
},
908 {"Omod", "\"mod\"", BINOP_MOD
},
909 {"Orem", "\"rem\"", BINOP_REM
},
910 {"Oexpon", "\"**\"", BINOP_EXP
},
911 {"Olt", "\"<\"", BINOP_LESS
},
912 {"Ole", "\"<=\"", BINOP_LEQ
},
913 {"Ogt", "\">\"", BINOP_GTR
},
914 {"Oge", "\">=\"", BINOP_GEQ
},
915 {"Oeq", "\"=\"", BINOP_EQUAL
},
916 {"One", "\"/=\"", BINOP_NOTEQUAL
},
917 {"Oand", "\"and\"", BINOP_BITWISE_AND
},
918 {"Oor", "\"or\"", BINOP_BITWISE_IOR
},
919 {"Oxor", "\"xor\"", BINOP_BITWISE_XOR
},
920 {"Oconcat", "\"&\"", BINOP_CONCAT
},
921 {"Oabs", "\"abs\"", UNOP_ABS
},
922 {"Onot", "\"not\"", UNOP_LOGICAL_NOT
},
923 {"Oadd", "\"+\"", UNOP_PLUS
},
924 {"Osubtract", "\"-\"", UNOP_NEG
},
928 /* The "encoded" form of DECODED, according to GNAT conventions. The
929 result is valid until the next call to ada_encode. If
930 THROW_ERRORS, throw an error if invalid operator name is found.
931 Otherwise, return NULL in that case. */
934 ada_encode_1 (const char *decoded
, bool throw_errors
)
936 static char *encoding_buffer
= NULL
;
937 static size_t encoding_buffer_size
= 0;
944 GROW_VECT (encoding_buffer
, encoding_buffer_size
,
945 2 * strlen (decoded
) + 10);
948 for (p
= decoded
; *p
!= '\0'; p
+= 1)
952 encoding_buffer
[k
] = encoding_buffer
[k
+ 1] = '_';
957 const struct ada_opname_map
*mapping
;
959 for (mapping
= ada_opname_table
;
960 mapping
->encoded
!= NULL
961 && !startswith (p
, mapping
->decoded
); mapping
+= 1)
963 if (mapping
->encoded
== NULL
)
966 error (_("invalid Ada operator name: %s"), p
);
970 strcpy (encoding_buffer
+ k
, mapping
->encoded
);
971 k
+= strlen (mapping
->encoded
);
976 encoding_buffer
[k
] = *p
;
981 encoding_buffer
[k
] = '\0';
982 return encoding_buffer
;
985 /* The "encoded" form of DECODED, according to GNAT conventions.
986 The result is valid until the next call to ada_encode. */
989 ada_encode (const char *decoded
)
991 return ada_encode_1 (decoded
, true);
994 /* Return NAME folded to lower case, or, if surrounded by single
995 quotes, unfolded, but with the quotes stripped away. Result good
999 ada_fold_name (gdb::string_view name
)
1001 static char *fold_buffer
= NULL
;
1002 static size_t fold_buffer_size
= 0;
1004 int len
= name
.size ();
1005 GROW_VECT (fold_buffer
, fold_buffer_size
, len
+ 1);
1007 if (name
[0] == '\'')
1009 strncpy (fold_buffer
, name
.data () + 1, len
- 2);
1010 fold_buffer
[len
- 2] = '\000';
1016 for (i
= 0; i
<= len
; i
+= 1)
1017 fold_buffer
[i
] = tolower (name
[i
]);
1023 /* Return nonzero if C is either a digit or a lowercase alphabet character. */
1026 is_lower_alphanum (const char c
)
1028 return (isdigit (c
) || (isalpha (c
) && islower (c
)));
1031 /* ENCODED is the linkage name of a symbol and LEN contains its length.
1032 This function saves in LEN the length of that same symbol name but
1033 without either of these suffixes:
1039 These are suffixes introduced by the compiler for entities such as
1040 nested subprogram for instance, in order to avoid name clashes.
1041 They do not serve any purpose for the debugger. */
1044 ada_remove_trailing_digits (const char *encoded
, int *len
)
1046 if (*len
> 1 && isdigit (encoded
[*len
- 1]))
1050 while (i
> 0 && isdigit (encoded
[i
]))
1052 if (i
>= 0 && encoded
[i
] == '.')
1054 else if (i
>= 0 && encoded
[i
] == '$')
1056 else if (i
>= 2 && startswith (encoded
+ i
- 2, "___"))
1058 else if (i
>= 1 && startswith (encoded
+ i
- 1, "__"))
1063 /* Remove the suffix introduced by the compiler for protected object
1067 ada_remove_po_subprogram_suffix (const char *encoded
, int *len
)
1069 /* Remove trailing N. */
1071 /* Protected entry subprograms are broken into two
1072 separate subprograms: The first one is unprotected, and has
1073 a 'N' suffix; the second is the protected version, and has
1074 the 'P' suffix. The second calls the first one after handling
1075 the protection. Since the P subprograms are internally generated,
1076 we leave these names undecoded, giving the user a clue that this
1077 entity is internal. */
1080 && encoded
[*len
- 1] == 'N'
1081 && (isdigit (encoded
[*len
- 2]) || islower (encoded
[*len
- 2])))
1085 /* If ENCODED follows the GNAT entity encoding conventions, then return
1086 the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is
1087 replaced by ENCODED. */
1090 ada_decode (const char *encoded
)
1096 std::string decoded
;
1098 /* With function descriptors on PPC64, the value of a symbol named
1099 ".FN", if it exists, is the entry point of the function "FN". */
1100 if (encoded
[0] == '.')
1103 /* The name of the Ada main procedure starts with "_ada_".
1104 This prefix is not part of the decoded name, so skip this part
1105 if we see this prefix. */
1106 if (startswith (encoded
, "_ada_"))
1109 /* If the name starts with '_', then it is not a properly encoded
1110 name, so do not attempt to decode it. Similarly, if the name
1111 starts with '<', the name should not be decoded. */
1112 if (encoded
[0] == '_' || encoded
[0] == '<')
1115 len0
= strlen (encoded
);
1117 ada_remove_trailing_digits (encoded
, &len0
);
1118 ada_remove_po_subprogram_suffix (encoded
, &len0
);
1120 /* Remove the ___X.* suffix if present. Do not forget to verify that
1121 the suffix is located before the current "end" of ENCODED. We want
1122 to avoid re-matching parts of ENCODED that have previously been
1123 marked as discarded (by decrementing LEN0). */
1124 p
= strstr (encoded
, "___");
1125 if (p
!= NULL
&& p
- encoded
< len0
- 3)
1133 /* Remove any trailing TKB suffix. It tells us that this symbol
1134 is for the body of a task, but that information does not actually
1135 appear in the decoded name. */
1137 if (len0
> 3 && startswith (encoded
+ len0
- 3, "TKB"))
1140 /* Remove any trailing TB suffix. The TB suffix is slightly different
1141 from the TKB suffix because it is used for non-anonymous task
1144 if (len0
> 2 && startswith (encoded
+ len0
- 2, "TB"))
1147 /* Remove trailing "B" suffixes. */
1148 /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */
1150 if (len0
> 1 && startswith (encoded
+ len0
- 1, "B"))
1153 /* Make decoded big enough for possible expansion by operator name. */
1155 decoded
.resize (2 * len0
+ 1, 'X');
1157 /* Remove trailing __{digit}+ or trailing ${digit}+. */
1159 if (len0
> 1 && isdigit (encoded
[len0
- 1]))
1162 while ((i
>= 0 && isdigit (encoded
[i
]))
1163 || (i
>= 1 && encoded
[i
] == '_' && isdigit (encoded
[i
- 1])))
1165 if (i
> 1 && encoded
[i
] == '_' && encoded
[i
- 1] == '_')
1167 else if (encoded
[i
] == '$')
1171 /* The first few characters that are not alphabetic are not part
1172 of any encoding we use, so we can copy them over verbatim. */
1174 for (i
= 0, j
= 0; i
< len0
&& !isalpha (encoded
[i
]); i
+= 1, j
+= 1)
1175 decoded
[j
] = encoded
[i
];
1180 /* Is this a symbol function? */
1181 if (at_start_name
&& encoded
[i
] == 'O')
1185 for (k
= 0; ada_opname_table
[k
].encoded
!= NULL
; k
+= 1)
1187 int op_len
= strlen (ada_opname_table
[k
].encoded
);
1188 if ((strncmp (ada_opname_table
[k
].encoded
+ 1, encoded
+ i
+ 1,
1190 && !isalnum (encoded
[i
+ op_len
]))
1192 strcpy (&decoded
.front() + j
, ada_opname_table
[k
].decoded
);
1195 j
+= strlen (ada_opname_table
[k
].decoded
);
1199 if (ada_opname_table
[k
].encoded
!= NULL
)
1204 /* Replace "TK__" with "__", which will eventually be translated
1205 into "." (just below). */
1207 if (i
< len0
- 4 && startswith (encoded
+ i
, "TK__"))
1210 /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually
1211 be translated into "." (just below). These are internal names
1212 generated for anonymous blocks inside which our symbol is nested. */
1214 if (len0
- i
> 5 && encoded
[i
] == '_' && encoded
[i
+1] == '_'
1215 && encoded
[i
+2] == 'B' && encoded
[i
+3] == '_'
1216 && isdigit (encoded
[i
+4]))
1220 while (k
< len0
&& isdigit (encoded
[k
]))
1221 k
++; /* Skip any extra digit. */
1223 /* Double-check that the "__B_{DIGITS}+" sequence we found
1224 is indeed followed by "__". */
1225 if (len0
- k
> 2 && encoded
[k
] == '_' && encoded
[k
+1] == '_')
1229 /* Remove _E{DIGITS}+[sb] */
1231 /* Just as for protected object subprograms, there are 2 categories
1232 of subprograms created by the compiler for each entry. The first
1233 one implements the actual entry code, and has a suffix following
1234 the convention above; the second one implements the barrier and
1235 uses the same convention as above, except that the 'E' is replaced
1238 Just as above, we do not decode the name of barrier functions
1239 to give the user a clue that the code he is debugging has been
1240 internally generated. */
1242 if (len0
- i
> 3 && encoded
[i
] == '_' && encoded
[i
+1] == 'E'
1243 && isdigit (encoded
[i
+2]))
1247 while (k
< len0
&& isdigit (encoded
[k
]))
1251 && (encoded
[k
] == 'b' || encoded
[k
] == 's'))
1254 /* Just as an extra precaution, make sure that if this
1255 suffix is followed by anything else, it is a '_'.
1256 Otherwise, we matched this sequence by accident. */
1258 || (k
< len0
&& encoded
[k
] == '_'))
1263 /* Remove trailing "N" in [a-z0-9]+N__. The N is added by
1264 the GNAT front-end in protected object subprograms. */
1267 && encoded
[i
] == 'N' && encoded
[i
+1] == '_' && encoded
[i
+2] == '_')
1269 /* Backtrack a bit up until we reach either the begining of
1270 the encoded name, or "__". Make sure that we only find
1271 digits or lowercase characters. */
1272 const char *ptr
= encoded
+ i
- 1;
1274 while (ptr
>= encoded
&& is_lower_alphanum (ptr
[0]))
1277 || (ptr
> encoded
&& ptr
[0] == '_' && ptr
[-1] == '_'))
1281 if (encoded
[i
] == 'X' && i
!= 0 && isalnum (encoded
[i
- 1]))
1283 /* This is a X[bn]* sequence not separated from the previous
1284 part of the name with a non-alpha-numeric character (in other
1285 words, immediately following an alpha-numeric character), then
1286 verify that it is placed at the end of the encoded name. If
1287 not, then the encoding is not valid and we should abort the
1288 decoding. Otherwise, just skip it, it is used in body-nested
1292 while (i
< len0
&& (encoded
[i
] == 'b' || encoded
[i
] == 'n'));
1296 else if (i
< len0
- 2 && encoded
[i
] == '_' && encoded
[i
+ 1] == '_')
1298 /* Replace '__' by '.'. */
1306 /* It's a character part of the decoded name, so just copy it
1308 decoded
[j
] = encoded
[i
];
1315 /* Decoded names should never contain any uppercase character.
1316 Double-check this, and abort the decoding if we find one. */
1318 for (i
= 0; i
< decoded
.length(); ++i
)
1319 if (isupper (decoded
[i
]) || decoded
[i
] == ' ')
1325 if (encoded
[0] == '<')
1328 decoded
= '<' + std::string(encoded
) + '>';
1333 /* Table for keeping permanent unique copies of decoded names. Once
1334 allocated, names in this table are never released. While this is a
1335 storage leak, it should not be significant unless there are massive
1336 changes in the set of decoded names in successive versions of a
1337 symbol table loaded during a single session. */
1338 static struct htab
*decoded_names_store
;
1340 /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it
1341 in the language-specific part of GSYMBOL, if it has not been
1342 previously computed. Tries to save the decoded name in the same
1343 obstack as GSYMBOL, if possible, and otherwise on the heap (so that,
1344 in any case, the decoded symbol has a lifetime at least that of
1346 The GSYMBOL parameter is "mutable" in the C++ sense: logically
1347 const, but nevertheless modified to a semantically equivalent form
1348 when a decoded name is cached in it. */
1351 ada_decode_symbol (const struct general_symbol_info
*arg
)
1353 struct general_symbol_info
*gsymbol
= (struct general_symbol_info
*) arg
;
1354 const char **resultp
=
1355 &gsymbol
->language_specific
.demangled_name
;
1357 if (!gsymbol
->ada_mangled
)
1359 std::string decoded
= ada_decode (gsymbol
->linkage_name ());
1360 struct obstack
*obstack
= gsymbol
->language_specific
.obstack
;
1362 gsymbol
->ada_mangled
= 1;
1364 if (obstack
!= NULL
)
1365 *resultp
= obstack_strdup (obstack
, decoded
.c_str ());
1368 /* Sometimes, we can't find a corresponding objfile, in
1369 which case, we put the result on the heap. Since we only
1370 decode when needed, we hope this usually does not cause a
1371 significant memory leak (FIXME). */
1373 char **slot
= (char **) htab_find_slot (decoded_names_store
,
1374 decoded
.c_str (), INSERT
);
1377 *slot
= xstrdup (decoded
.c_str ());
1386 ada_la_decode (const char *encoded
, int options
)
1388 return xstrdup (ada_decode (encoded
).c_str ());
1391 /* Implement la_sniff_from_mangled_name for Ada. */
1394 ada_sniff_from_mangled_name (const char *mangled
, char **out
)
1396 std::string demangled
= ada_decode (mangled
);
1400 if (demangled
!= mangled
&& demangled
[0] != '<')
1402 /* Set the gsymbol language to Ada, but still return 0.
1403 Two reasons for that:
1405 1. For Ada, we prefer computing the symbol's decoded name
1406 on the fly rather than pre-compute it, in order to save
1407 memory (Ada projects are typically very large).
1409 2. There are some areas in the definition of the GNAT
1410 encoding where, with a bit of bad luck, we might be able
1411 to decode a non-Ada symbol, generating an incorrect
1412 demangled name (Eg: names ending with "TB" for instance
1413 are identified as task bodies and so stripped from
1414 the decoded name returned).
1416 Returning 1, here, but not setting *DEMANGLED, helps us get a
1417 little bit of the best of both worlds. Because we're last,
1418 we should not affect any of the other languages that were
1419 able to demangle the symbol before us; we get to correctly
1420 tag Ada symbols as such; and even if we incorrectly tagged a
1421 non-Ada symbol, which should be rare, any routing through the
1422 Ada language should be transparent (Ada tries to behave much
1423 like C/C++ with non-Ada symbols). */
1434 /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure
1435 generated by the GNAT compiler to describe the index type used
1436 for each dimension of an array, check whether it follows the latest
1437 known encoding. If not, fix it up to conform to the latest encoding.
1438 Otherwise, do nothing. This function also does nothing if
1439 INDEX_DESC_TYPE is NULL.
1441 The GNAT encoding used to describe the array index type evolved a bit.
1442 Initially, the information would be provided through the name of each
1443 field of the structure type only, while the type of these fields was
1444 described as unspecified and irrelevant. The debugger was then expected
1445 to perform a global type lookup using the name of that field in order
1446 to get access to the full index type description. Because these global
1447 lookups can be very expensive, the encoding was later enhanced to make
1448 the global lookup unnecessary by defining the field type as being
1449 the full index type description.
1451 The purpose of this routine is to allow us to support older versions
1452 of the compiler by detecting the use of the older encoding, and by
1453 fixing up the INDEX_DESC_TYPE to follow the new one (at this point,
1454 we essentially replace each field's meaningless type by the associated
1458 ada_fixup_array_indexes_type (struct type
*index_desc_type
)
1462 if (index_desc_type
== NULL
)
1464 gdb_assert (TYPE_NFIELDS (index_desc_type
) > 0);
1466 /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient
1467 to check one field only, no need to check them all). If not, return
1470 If our INDEX_DESC_TYPE was generated using the older encoding,
1471 the field type should be a meaningless integer type whose name
1472 is not equal to the field name. */
1473 if (TYPE_FIELD_TYPE (index_desc_type
, 0)->name () != NULL
1474 && strcmp (TYPE_FIELD_TYPE (index_desc_type
, 0)->name (),
1475 TYPE_FIELD_NAME (index_desc_type
, 0)) == 0)
1478 /* Fixup each field of INDEX_DESC_TYPE. */
1479 for (i
= 0; i
< TYPE_NFIELDS (index_desc_type
); i
++)
1481 const char *name
= TYPE_FIELD_NAME (index_desc_type
, i
);
1482 struct type
*raw_type
= ada_check_typedef (ada_find_any_type (name
));
1485 TYPE_FIELD_TYPE (index_desc_type
, i
) = raw_type
;
1489 /* The desc_* routines return primitive portions of array descriptors
1492 /* The descriptor or array type, if any, indicated by TYPE; removes
1493 level of indirection, if needed. */
1495 static struct type
*
1496 desc_base_type (struct type
*type
)
1500 type
= ada_check_typedef (type
);
1501 if (type
->code () == TYPE_CODE_TYPEDEF
)
1502 type
= ada_typedef_target_type (type
);
1505 && (type
->code () == TYPE_CODE_PTR
1506 || type
->code () == TYPE_CODE_REF
))
1507 return ada_check_typedef (TYPE_TARGET_TYPE (type
));
1512 /* True iff TYPE indicates a "thin" array pointer type. */
1515 is_thin_pntr (struct type
*type
)
1518 is_suffix (ada_type_name (desc_base_type (type
)), "___XUT")
1519 || is_suffix (ada_type_name (desc_base_type (type
)), "___XUT___XVE");
1522 /* The descriptor type for thin pointer type TYPE. */
1524 static struct type
*
1525 thin_descriptor_type (struct type
*type
)
1527 struct type
*base_type
= desc_base_type (type
);
1529 if (base_type
== NULL
)
1531 if (is_suffix (ada_type_name (base_type
), "___XVE"))
1535 struct type
*alt_type
= ada_find_parallel_type (base_type
, "___XVE");
1537 if (alt_type
== NULL
)
1544 /* A pointer to the array data for thin-pointer value VAL. */
1546 static struct value
*
1547 thin_data_pntr (struct value
*val
)
1549 struct type
*type
= ada_check_typedef (value_type (val
));
1550 struct type
*data_type
= desc_data_target_type (thin_descriptor_type (type
));
1552 data_type
= lookup_pointer_type (data_type
);
1554 if (type
->code () == TYPE_CODE_PTR
)
1555 return value_cast (data_type
, value_copy (val
));
1557 return value_from_longest (data_type
, value_address (val
));
1560 /* True iff TYPE indicates a "thick" array pointer type. */
1563 is_thick_pntr (struct type
*type
)
1565 type
= desc_base_type (type
);
1566 return (type
!= NULL
&& type
->code () == TYPE_CODE_STRUCT
1567 && lookup_struct_elt_type (type
, "P_BOUNDS", 1) != NULL
);
1570 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1571 pointer to one, the type of its bounds data; otherwise, NULL. */
1573 static struct type
*
1574 desc_bounds_type (struct type
*type
)
1578 type
= desc_base_type (type
);
1582 else if (is_thin_pntr (type
))
1584 type
= thin_descriptor_type (type
);
1587 r
= lookup_struct_elt_type (type
, "BOUNDS", 1);
1589 return ada_check_typedef (r
);
1591 else if (type
->code () == TYPE_CODE_STRUCT
)
1593 r
= lookup_struct_elt_type (type
, "P_BOUNDS", 1);
1595 return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r
)));
1600 /* If ARR is an array descriptor (fat or thin pointer), or pointer to
1601 one, a pointer to its bounds data. Otherwise NULL. */
1603 static struct value
*
1604 desc_bounds (struct value
*arr
)
1606 struct type
*type
= ada_check_typedef (value_type (arr
));
1608 if (is_thin_pntr (type
))
1610 struct type
*bounds_type
=
1611 desc_bounds_type (thin_descriptor_type (type
));
1614 if (bounds_type
== NULL
)
1615 error (_("Bad GNAT array descriptor"));
1617 /* NOTE: The following calculation is not really kosher, but
1618 since desc_type is an XVE-encoded type (and shouldn't be),
1619 the correct calculation is a real pain. FIXME (and fix GCC). */
1620 if (type
->code () == TYPE_CODE_PTR
)
1621 addr
= value_as_long (arr
);
1623 addr
= value_address (arr
);
1626 value_from_longest (lookup_pointer_type (bounds_type
),
1627 addr
- TYPE_LENGTH (bounds_type
));
1630 else if (is_thick_pntr (type
))
1632 struct value
*p_bounds
= value_struct_elt (&arr
, NULL
, "P_BOUNDS", NULL
,
1633 _("Bad GNAT array descriptor"));
1634 struct type
*p_bounds_type
= value_type (p_bounds
);
1637 && p_bounds_type
->code () == TYPE_CODE_PTR
)
1639 struct type
*target_type
= TYPE_TARGET_TYPE (p_bounds_type
);
1641 if (TYPE_STUB (target_type
))
1642 p_bounds
= value_cast (lookup_pointer_type
1643 (ada_check_typedef (target_type
)),
1647 error (_("Bad GNAT array descriptor"));
1655 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1656 position of the field containing the address of the bounds data. */
1659 fat_pntr_bounds_bitpos (struct type
*type
)
1661 return TYPE_FIELD_BITPOS (desc_base_type (type
), 1);
1664 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1665 size of the field containing the address of the bounds data. */
1668 fat_pntr_bounds_bitsize (struct type
*type
)
1670 type
= desc_base_type (type
);
1672 if (TYPE_FIELD_BITSIZE (type
, 1) > 0)
1673 return TYPE_FIELD_BITSIZE (type
, 1);
1675 return 8 * TYPE_LENGTH (ada_check_typedef (TYPE_FIELD_TYPE (type
, 1)));
1678 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1679 pointer to one, the type of its array data (a array-with-no-bounds type);
1680 otherwise, NULL. Use ada_type_of_array to get an array type with bounds
1683 static struct type
*
1684 desc_data_target_type (struct type
*type
)
1686 type
= desc_base_type (type
);
1688 /* NOTE: The following is bogus; see comment in desc_bounds. */
1689 if (is_thin_pntr (type
))
1690 return desc_base_type (TYPE_FIELD_TYPE (thin_descriptor_type (type
), 1));
1691 else if (is_thick_pntr (type
))
1693 struct type
*data_type
= lookup_struct_elt_type (type
, "P_ARRAY", 1);
1696 && ada_check_typedef (data_type
)->code () == TYPE_CODE_PTR
)
1697 return ada_check_typedef (TYPE_TARGET_TYPE (data_type
));
1703 /* If ARR is an array descriptor (fat or thin pointer), a pointer to
1706 static struct value
*
1707 desc_data (struct value
*arr
)
1709 struct type
*type
= value_type (arr
);
1711 if (is_thin_pntr (type
))
1712 return thin_data_pntr (arr
);
1713 else if (is_thick_pntr (type
))
1714 return value_struct_elt (&arr
, NULL
, "P_ARRAY", NULL
,
1715 _("Bad GNAT array descriptor"));
1721 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1722 position of the field containing the address of the data. */
1725 fat_pntr_data_bitpos (struct type
*type
)
1727 return TYPE_FIELD_BITPOS (desc_base_type (type
), 0);
1730 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1731 size of the field containing the address of the data. */
1734 fat_pntr_data_bitsize (struct type
*type
)
1736 type
= desc_base_type (type
);
1738 if (TYPE_FIELD_BITSIZE (type
, 0) > 0)
1739 return TYPE_FIELD_BITSIZE (type
, 0);
1741 return TARGET_CHAR_BIT
* TYPE_LENGTH (TYPE_FIELD_TYPE (type
, 0));
1744 /* If BOUNDS is an array-bounds structure (or pointer to one), return
1745 the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1746 bound, if WHICH is 1. The first bound is I=1. */
1748 static struct value
*
1749 desc_one_bound (struct value
*bounds
, int i
, int which
)
1751 char bound_name
[20];
1752 xsnprintf (bound_name
, sizeof (bound_name
), "%cB%d",
1753 which
? 'U' : 'L', i
- 1);
1754 return value_struct_elt (&bounds
, NULL
, bound_name
, NULL
,
1755 _("Bad GNAT array descriptor bounds"));
1758 /* If BOUNDS is an array-bounds structure type, return the bit position
1759 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1760 bound, if WHICH is 1. The first bound is I=1. */
1763 desc_bound_bitpos (struct type
*type
, int i
, int which
)
1765 return TYPE_FIELD_BITPOS (desc_base_type (type
), 2 * i
+ which
- 2);
1768 /* If BOUNDS is an array-bounds structure type, return the bit field size
1769 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1770 bound, if WHICH is 1. The first bound is I=1. */
1773 desc_bound_bitsize (struct type
*type
, int i
, int which
)
1775 type
= desc_base_type (type
);
1777 if (TYPE_FIELD_BITSIZE (type
, 2 * i
+ which
- 2) > 0)
1778 return TYPE_FIELD_BITSIZE (type
, 2 * i
+ which
- 2);
1780 return 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (type
, 2 * i
+ which
- 2));
1783 /* If TYPE is the type of an array-bounds structure, the type of its
1784 Ith bound (numbering from 1). Otherwise, NULL. */
1786 static struct type
*
1787 desc_index_type (struct type
*type
, int i
)
1789 type
= desc_base_type (type
);
1791 if (type
->code () == TYPE_CODE_STRUCT
)
1793 char bound_name
[20];
1794 xsnprintf (bound_name
, sizeof (bound_name
), "LB%d", i
- 1);
1795 return lookup_struct_elt_type (type
, bound_name
, 1);
1801 /* The number of index positions in the array-bounds type TYPE.
1802 Return 0 if TYPE is NULL. */
1805 desc_arity (struct type
*type
)
1807 type
= desc_base_type (type
);
1810 return TYPE_NFIELDS (type
) / 2;
1814 /* Non-zero iff TYPE is a simple array type (not a pointer to one) or
1815 an array descriptor type (representing an unconstrained array
1819 ada_is_direct_array_type (struct type
*type
)
1823 type
= ada_check_typedef (type
);
1824 return (type
->code () == TYPE_CODE_ARRAY
1825 || ada_is_array_descriptor_type (type
));
1828 /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer
1832 ada_is_array_type (struct type
*type
)
1835 && (type
->code () == TYPE_CODE_PTR
1836 || type
->code () == TYPE_CODE_REF
))
1837 type
= TYPE_TARGET_TYPE (type
);
1838 return ada_is_direct_array_type (type
);
1841 /* Non-zero iff TYPE is a simple array type or pointer to one. */
1844 ada_is_simple_array_type (struct type
*type
)
1848 type
= ada_check_typedef (type
);
1849 return (type
->code () == TYPE_CODE_ARRAY
1850 || (type
->code () == TYPE_CODE_PTR
1851 && (ada_check_typedef (TYPE_TARGET_TYPE (type
))->code ()
1852 == TYPE_CODE_ARRAY
)));
1855 /* Non-zero iff TYPE belongs to a GNAT array descriptor. */
1858 ada_is_array_descriptor_type (struct type
*type
)
1860 struct type
*data_type
= desc_data_target_type (type
);
1864 type
= ada_check_typedef (type
);
1865 return (data_type
!= NULL
1866 && data_type
->code () == TYPE_CODE_ARRAY
1867 && desc_arity (desc_bounds_type (type
)) > 0);
1870 /* Non-zero iff type is a partially mal-formed GNAT array
1871 descriptor. FIXME: This is to compensate for some problems with
1872 debugging output from GNAT. Re-examine periodically to see if it
1876 ada_is_bogus_array_descriptor (struct type
*type
)
1880 && type
->code () == TYPE_CODE_STRUCT
1881 && (lookup_struct_elt_type (type
, "P_BOUNDS", 1) != NULL
1882 || lookup_struct_elt_type (type
, "P_ARRAY", 1) != NULL
)
1883 && !ada_is_array_descriptor_type (type
);
1887 /* If ARR has a record type in the form of a standard GNAT array descriptor,
1888 (fat pointer) returns the type of the array data described---specifically,
1889 a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled
1890 in from the descriptor; otherwise, they are left unspecified. If
1891 the ARR denotes a null array descriptor and BOUNDS is non-zero,
1892 returns NULL. The result is simply the type of ARR if ARR is not
1895 static struct type
*
1896 ada_type_of_array (struct value
*arr
, int bounds
)
1898 if (ada_is_constrained_packed_array_type (value_type (arr
)))
1899 return decode_constrained_packed_array_type (value_type (arr
));
1901 if (!ada_is_array_descriptor_type (value_type (arr
)))
1902 return value_type (arr
);
1906 struct type
*array_type
=
1907 ada_check_typedef (desc_data_target_type (value_type (arr
)));
1909 if (ada_is_unconstrained_packed_array_type (value_type (arr
)))
1910 TYPE_FIELD_BITSIZE (array_type
, 0) =
1911 decode_packed_array_bitsize (value_type (arr
));
1917 struct type
*elt_type
;
1919 struct value
*descriptor
;
1921 elt_type
= ada_array_element_type (value_type (arr
), -1);
1922 arity
= ada_array_arity (value_type (arr
));
1924 if (elt_type
== NULL
|| arity
== 0)
1925 return ada_check_typedef (value_type (arr
));
1927 descriptor
= desc_bounds (arr
);
1928 if (value_as_long (descriptor
) == 0)
1932 struct type
*range_type
= alloc_type_copy (value_type (arr
));
1933 struct type
*array_type
= alloc_type_copy (value_type (arr
));
1934 struct value
*low
= desc_one_bound (descriptor
, arity
, 0);
1935 struct value
*high
= desc_one_bound (descriptor
, arity
, 1);
1938 create_static_range_type (range_type
, value_type (low
),
1939 longest_to_int (value_as_long (low
)),
1940 longest_to_int (value_as_long (high
)));
1941 elt_type
= create_array_type (array_type
, elt_type
, range_type
);
1943 if (ada_is_unconstrained_packed_array_type (value_type (arr
)))
1945 /* We need to store the element packed bitsize, as well as
1946 recompute the array size, because it was previously
1947 computed based on the unpacked element size. */
1948 LONGEST lo
= value_as_long (low
);
1949 LONGEST hi
= value_as_long (high
);
1951 TYPE_FIELD_BITSIZE (elt_type
, 0) =
1952 decode_packed_array_bitsize (value_type (arr
));
1953 /* If the array has no element, then the size is already
1954 zero, and does not need to be recomputed. */
1958 (hi
- lo
+ 1) * TYPE_FIELD_BITSIZE (elt_type
, 0);
1960 TYPE_LENGTH (array_type
) = (array_bitsize
+ 7) / 8;
1965 return lookup_pointer_type (elt_type
);
1969 /* If ARR does not represent an array, returns ARR unchanged.
1970 Otherwise, returns either a standard GDB array with bounds set
1971 appropriately or, if ARR is a non-null fat pointer, a pointer to a standard
1972 GDB array. Returns NULL if ARR is a null fat pointer. */
1975 ada_coerce_to_simple_array_ptr (struct value
*arr
)
1977 if (ada_is_array_descriptor_type (value_type (arr
)))
1979 struct type
*arrType
= ada_type_of_array (arr
, 1);
1981 if (arrType
== NULL
)
1983 return value_cast (arrType
, value_copy (desc_data (arr
)));
1985 else if (ada_is_constrained_packed_array_type (value_type (arr
)))
1986 return decode_constrained_packed_array (arr
);
1991 /* If ARR does not represent an array, returns ARR unchanged.
1992 Otherwise, returns a standard GDB array describing ARR (which may
1993 be ARR itself if it already is in the proper form). */
1996 ada_coerce_to_simple_array (struct value
*arr
)
1998 if (ada_is_array_descriptor_type (value_type (arr
)))
2000 struct value
*arrVal
= ada_coerce_to_simple_array_ptr (arr
);
2003 error (_("Bounds unavailable for null array pointer."));
2004 ada_ensure_varsize_limit (TYPE_TARGET_TYPE (value_type (arrVal
)));
2005 return value_ind (arrVal
);
2007 else if (ada_is_constrained_packed_array_type (value_type (arr
)))
2008 return decode_constrained_packed_array (arr
);
2013 /* If TYPE represents a GNAT array type, return it translated to an
2014 ordinary GDB array type (possibly with BITSIZE fields indicating
2015 packing). For other types, is the identity. */
2018 ada_coerce_to_simple_array_type (struct type
*type
)
2020 if (ada_is_constrained_packed_array_type (type
))
2021 return decode_constrained_packed_array_type (type
);
2023 if (ada_is_array_descriptor_type (type
))
2024 return ada_check_typedef (desc_data_target_type (type
));
2029 /* Non-zero iff TYPE represents a standard GNAT packed-array type. */
2032 ada_is_packed_array_type (struct type
*type
)
2036 type
= desc_base_type (type
);
2037 type
= ada_check_typedef (type
);
2039 ada_type_name (type
) != NULL
2040 && strstr (ada_type_name (type
), "___XP") != NULL
;
2043 /* Non-zero iff TYPE represents a standard GNAT constrained
2044 packed-array type. */
2047 ada_is_constrained_packed_array_type (struct type
*type
)
2049 return ada_is_packed_array_type (type
)
2050 && !ada_is_array_descriptor_type (type
);
2053 /* Non-zero iff TYPE represents an array descriptor for a
2054 unconstrained packed-array type. */
2057 ada_is_unconstrained_packed_array_type (struct type
*type
)
2059 return ada_is_packed_array_type (type
)
2060 && ada_is_array_descriptor_type (type
);
2063 /* Given that TYPE encodes a packed array type (constrained or unconstrained),
2064 return the size of its elements in bits. */
2067 decode_packed_array_bitsize (struct type
*type
)
2069 const char *raw_name
;
2073 /* Access to arrays implemented as fat pointers are encoded as a typedef
2074 of the fat pointer type. We need the name of the fat pointer type
2075 to do the decoding, so strip the typedef layer. */
2076 if (type
->code () == TYPE_CODE_TYPEDEF
)
2077 type
= ada_typedef_target_type (type
);
2079 raw_name
= ada_type_name (ada_check_typedef (type
));
2081 raw_name
= ada_type_name (desc_base_type (type
));
2086 tail
= strstr (raw_name
, "___XP");
2087 gdb_assert (tail
!= NULL
);
2089 if (sscanf (tail
+ sizeof ("___XP") - 1, "%ld", &bits
) != 1)
2092 (_("could not understand bit size information on packed array"));
2099 /* Given that TYPE is a standard GDB array type with all bounds filled
2100 in, and that the element size of its ultimate scalar constituents
2101 (that is, either its elements, or, if it is an array of arrays, its
2102 elements' elements, etc.) is *ELT_BITS, return an identical type,
2103 but with the bit sizes of its elements (and those of any
2104 constituent arrays) recorded in the BITSIZE components of its
2105 TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size
2108 Note that, for arrays whose index type has an XA encoding where
2109 a bound references a record discriminant, getting that discriminant,
2110 and therefore the actual value of that bound, is not possible
2111 because none of the given parameters gives us access to the record.
2112 This function assumes that it is OK in the context where it is being
2113 used to return an array whose bounds are still dynamic and where
2114 the length is arbitrary. */
2116 static struct type
*
2117 constrained_packed_array_type (struct type
*type
, long *elt_bits
)
2119 struct type
*new_elt_type
;
2120 struct type
*new_type
;
2121 struct type
*index_type_desc
;
2122 struct type
*index_type
;
2123 LONGEST low_bound
, high_bound
;
2125 type
= ada_check_typedef (type
);
2126 if (type
->code () != TYPE_CODE_ARRAY
)
2129 index_type_desc
= ada_find_parallel_type (type
, "___XA");
2130 if (index_type_desc
)
2131 index_type
= to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc
, 0),
2134 index_type
= TYPE_INDEX_TYPE (type
);
2136 new_type
= alloc_type_copy (type
);
2138 constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type
)),
2140 create_array_type (new_type
, new_elt_type
, index_type
);
2141 TYPE_FIELD_BITSIZE (new_type
, 0) = *elt_bits
;
2142 new_type
->set_name (ada_type_name (type
));
2144 if ((check_typedef (index_type
)->code () == TYPE_CODE_RANGE
2145 && is_dynamic_type (check_typedef (index_type
)))
2146 || get_discrete_bounds (index_type
, &low_bound
, &high_bound
) < 0)
2147 low_bound
= high_bound
= 0;
2148 if (high_bound
< low_bound
)
2149 *elt_bits
= TYPE_LENGTH (new_type
) = 0;
2152 *elt_bits
*= (high_bound
- low_bound
+ 1);
2153 TYPE_LENGTH (new_type
) =
2154 (*elt_bits
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
;
2157 TYPE_FIXED_INSTANCE (new_type
) = 1;
2161 /* The array type encoded by TYPE, where
2162 ada_is_constrained_packed_array_type (TYPE). */
2164 static struct type
*
2165 decode_constrained_packed_array_type (struct type
*type
)
2167 const char *raw_name
= ada_type_name (ada_check_typedef (type
));
2170 struct type
*shadow_type
;
2174 raw_name
= ada_type_name (desc_base_type (type
));
2179 name
= (char *) alloca (strlen (raw_name
) + 1);
2180 tail
= strstr (raw_name
, "___XP");
2181 type
= desc_base_type (type
);
2183 memcpy (name
, raw_name
, tail
- raw_name
);
2184 name
[tail
- raw_name
] = '\000';
2186 shadow_type
= ada_find_parallel_type_with_name (type
, name
);
2188 if (shadow_type
== NULL
)
2190 lim_warning (_("could not find bounds information on packed array"));
2193 shadow_type
= check_typedef (shadow_type
);
2195 if (shadow_type
->code () != TYPE_CODE_ARRAY
)
2197 lim_warning (_("could not understand bounds "
2198 "information on packed array"));
2202 bits
= decode_packed_array_bitsize (type
);
2203 return constrained_packed_array_type (shadow_type
, &bits
);
2206 /* Given that ARR is a struct value *indicating a GNAT constrained packed
2207 array, returns a simple array that denotes that array. Its type is a
2208 standard GDB array type except that the BITSIZEs of the array
2209 target types are set to the number of bits in each element, and the
2210 type length is set appropriately. */
2212 static struct value
*
2213 decode_constrained_packed_array (struct value
*arr
)
2217 /* If our value is a pointer, then dereference it. Likewise if
2218 the value is a reference. Make sure that this operation does not
2219 cause the target type to be fixed, as this would indirectly cause
2220 this array to be decoded. The rest of the routine assumes that
2221 the array hasn't been decoded yet, so we use the basic "coerce_ref"
2222 and "value_ind" routines to perform the dereferencing, as opposed
2223 to using "ada_coerce_ref" or "ada_value_ind". */
2224 arr
= coerce_ref (arr
);
2225 if (ada_check_typedef (value_type (arr
))->code () == TYPE_CODE_PTR
)
2226 arr
= value_ind (arr
);
2228 type
= decode_constrained_packed_array_type (value_type (arr
));
2231 error (_("can't unpack array"));
2235 if (type_byte_order (value_type (arr
)) == BFD_ENDIAN_BIG
2236 && ada_is_modular_type (value_type (arr
)))
2238 /* This is a (right-justified) modular type representing a packed
2239 array with no wrapper. In order to interpret the value through
2240 the (left-justified) packed array type we just built, we must
2241 first left-justify it. */
2242 int bit_size
, bit_pos
;
2245 mod
= ada_modulus (value_type (arr
)) - 1;
2252 bit_pos
= HOST_CHAR_BIT
* TYPE_LENGTH (value_type (arr
)) - bit_size
;
2253 arr
= ada_value_primitive_packed_val (arr
, NULL
,
2254 bit_pos
/ HOST_CHAR_BIT
,
2255 bit_pos
% HOST_CHAR_BIT
,
2260 return coerce_unspec_val_to_type (arr
, type
);
2264 /* The value of the element of packed array ARR at the ARITY indices
2265 given in IND. ARR must be a simple array. */
2267 static struct value
*
2268 value_subscript_packed (struct value
*arr
, int arity
, struct value
**ind
)
2271 int bits
, elt_off
, bit_off
;
2272 long elt_total_bit_offset
;
2273 struct type
*elt_type
;
2277 elt_total_bit_offset
= 0;
2278 elt_type
= ada_check_typedef (value_type (arr
));
2279 for (i
= 0; i
< arity
; i
+= 1)
2281 if (elt_type
->code () != TYPE_CODE_ARRAY
2282 || TYPE_FIELD_BITSIZE (elt_type
, 0) == 0)
2284 (_("attempt to do packed indexing of "
2285 "something other than a packed array"));
2288 struct type
*range_type
= TYPE_INDEX_TYPE (elt_type
);
2289 LONGEST lowerbound
, upperbound
;
2292 if (get_discrete_bounds (range_type
, &lowerbound
, &upperbound
) < 0)
2294 lim_warning (_("don't know bounds of array"));
2295 lowerbound
= upperbound
= 0;
2298 idx
= pos_atr (ind
[i
]);
2299 if (idx
< lowerbound
|| idx
> upperbound
)
2300 lim_warning (_("packed array index %ld out of bounds"),
2302 bits
= TYPE_FIELD_BITSIZE (elt_type
, 0);
2303 elt_total_bit_offset
+= (idx
- lowerbound
) * bits
;
2304 elt_type
= ada_check_typedef (TYPE_TARGET_TYPE (elt_type
));
2307 elt_off
= elt_total_bit_offset
/ HOST_CHAR_BIT
;
2308 bit_off
= elt_total_bit_offset
% HOST_CHAR_BIT
;
2310 v
= ada_value_primitive_packed_val (arr
, NULL
, elt_off
, bit_off
,
2315 /* Non-zero iff TYPE includes negative integer values. */
2318 has_negatives (struct type
*type
)
2320 switch (type
->code ())
2325 return !TYPE_UNSIGNED (type
);
2326 case TYPE_CODE_RANGE
:
2327 return TYPE_LOW_BOUND (type
) - TYPE_RANGE_DATA (type
)->bias
< 0;
2331 /* With SRC being a buffer containing BIT_SIZE bits of data at BIT_OFFSET,
2332 unpack that data into UNPACKED. UNPACKED_LEN is the size in bytes of
2333 the unpacked buffer.
2335 The size of the unpacked buffer (UNPACKED_LEN) is expected to be large
2336 enough to contain at least BIT_OFFSET bits. If not, an error is raised.
2338 IS_BIG_ENDIAN is nonzero if the data is stored in big endian mode,
2341 IS_SIGNED_TYPE is nonzero if the data corresponds to a signed type.
2343 IS_SCALAR is nonzero if the data corresponds to a signed type. */
2346 ada_unpack_from_contents (const gdb_byte
*src
, int bit_offset
, int bit_size
,
2347 gdb_byte
*unpacked
, int unpacked_len
,
2348 int is_big_endian
, int is_signed_type
,
2351 int src_len
= (bit_size
+ bit_offset
+ HOST_CHAR_BIT
- 1) / 8;
2352 int src_idx
; /* Index into the source area */
2353 int src_bytes_left
; /* Number of source bytes left to process. */
2354 int srcBitsLeft
; /* Number of source bits left to move */
2355 int unusedLS
; /* Number of bits in next significant
2356 byte of source that are unused */
2358 int unpacked_idx
; /* Index into the unpacked buffer */
2359 int unpacked_bytes_left
; /* Number of bytes left to set in unpacked. */
2361 unsigned long accum
; /* Staging area for bits being transferred */
2362 int accumSize
; /* Number of meaningful bits in accum */
2365 /* Transmit bytes from least to most significant; delta is the direction
2366 the indices move. */
2367 int delta
= is_big_endian
? -1 : 1;
2369 /* Make sure that unpacked is large enough to receive the BIT_SIZE
2371 if ((bit_size
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
> unpacked_len
)
2372 error (_("Cannot unpack %d bits into buffer of %d bytes"),
2373 bit_size
, unpacked_len
);
2375 srcBitsLeft
= bit_size
;
2376 src_bytes_left
= src_len
;
2377 unpacked_bytes_left
= unpacked_len
;
2382 src_idx
= src_len
- 1;
2384 && ((src
[0] << bit_offset
) & (1 << (HOST_CHAR_BIT
- 1))))
2388 (HOST_CHAR_BIT
- (bit_size
+ bit_offset
) % HOST_CHAR_BIT
)
2394 unpacked_idx
= unpacked_len
- 1;
2398 /* Non-scalar values must be aligned at a byte boundary... */
2400 (HOST_CHAR_BIT
- bit_size
% HOST_CHAR_BIT
) % HOST_CHAR_BIT
;
2401 /* ... And are placed at the beginning (most-significant) bytes
2403 unpacked_idx
= (bit_size
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
- 1;
2404 unpacked_bytes_left
= unpacked_idx
+ 1;
2409 int sign_bit_offset
= (bit_size
+ bit_offset
- 1) % 8;
2411 src_idx
= unpacked_idx
= 0;
2412 unusedLS
= bit_offset
;
2415 if (is_signed_type
&& (src
[src_len
- 1] & (1 << sign_bit_offset
)))
2420 while (src_bytes_left
> 0)
2422 /* Mask for removing bits of the next source byte that are not
2423 part of the value. */
2424 unsigned int unusedMSMask
=
2425 (1 << (srcBitsLeft
>= HOST_CHAR_BIT
? HOST_CHAR_BIT
: srcBitsLeft
)) -
2427 /* Sign-extend bits for this byte. */
2428 unsigned int signMask
= sign
& ~unusedMSMask
;
2431 (((src
[src_idx
] >> unusedLS
) & unusedMSMask
) | signMask
) << accumSize
;
2432 accumSize
+= HOST_CHAR_BIT
- unusedLS
;
2433 if (accumSize
>= HOST_CHAR_BIT
)
2435 unpacked
[unpacked_idx
] = accum
& ~(~0UL << HOST_CHAR_BIT
);
2436 accumSize
-= HOST_CHAR_BIT
;
2437 accum
>>= HOST_CHAR_BIT
;
2438 unpacked_bytes_left
-= 1;
2439 unpacked_idx
+= delta
;
2441 srcBitsLeft
-= HOST_CHAR_BIT
- unusedLS
;
2443 src_bytes_left
-= 1;
2446 while (unpacked_bytes_left
> 0)
2448 accum
|= sign
<< accumSize
;
2449 unpacked
[unpacked_idx
] = accum
& ~(~0UL << HOST_CHAR_BIT
);
2450 accumSize
-= HOST_CHAR_BIT
;
2453 accum
>>= HOST_CHAR_BIT
;
2454 unpacked_bytes_left
-= 1;
2455 unpacked_idx
+= delta
;
2459 /* Create a new value of type TYPE from the contents of OBJ starting
2460 at byte OFFSET, and bit offset BIT_OFFSET within that byte,
2461 proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then
2462 assigning through the result will set the field fetched from.
2463 VALADDR is ignored unless OBJ is NULL, in which case,
2464 VALADDR+OFFSET must address the start of storage containing the
2465 packed value. The value returned in this case is never an lval.
2466 Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */
2469 ada_value_primitive_packed_val (struct value
*obj
, const gdb_byte
*valaddr
,
2470 long offset
, int bit_offset
, int bit_size
,
2474 const gdb_byte
*src
; /* First byte containing data to unpack */
2476 const int is_scalar
= is_scalar_type (type
);
2477 const int is_big_endian
= type_byte_order (type
) == BFD_ENDIAN_BIG
;
2478 gdb::byte_vector staging
;
2480 type
= ada_check_typedef (type
);
2483 src
= valaddr
+ offset
;
2485 src
= value_contents (obj
) + offset
;
2487 if (is_dynamic_type (type
))
2489 /* The length of TYPE might by dynamic, so we need to resolve
2490 TYPE in order to know its actual size, which we then use
2491 to create the contents buffer of the value we return.
2492 The difficulty is that the data containing our object is
2493 packed, and therefore maybe not at a byte boundary. So, what
2494 we do, is unpack the data into a byte-aligned buffer, and then
2495 use that buffer as our object's value for resolving the type. */
2496 int staging_len
= (bit_size
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
;
2497 staging
.resize (staging_len
);
2499 ada_unpack_from_contents (src
, bit_offset
, bit_size
,
2500 staging
.data (), staging
.size (),
2501 is_big_endian
, has_negatives (type
),
2503 type
= resolve_dynamic_type (type
, staging
, 0);
2504 if (TYPE_LENGTH (type
) < (bit_size
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
)
2506 /* This happens when the length of the object is dynamic,
2507 and is actually smaller than the space reserved for it.
2508 For instance, in an array of variant records, the bit_size
2509 we're given is the array stride, which is constant and
2510 normally equal to the maximum size of its element.
2511 But, in reality, each element only actually spans a portion
2513 bit_size
= TYPE_LENGTH (type
) * HOST_CHAR_BIT
;
2519 v
= allocate_value (type
);
2520 src
= valaddr
+ offset
;
2522 else if (VALUE_LVAL (obj
) == lval_memory
&& value_lazy (obj
))
2524 int src_len
= (bit_size
+ bit_offset
+ HOST_CHAR_BIT
- 1) / 8;
2527 v
= value_at (type
, value_address (obj
) + offset
);
2528 buf
= (gdb_byte
*) alloca (src_len
);
2529 read_memory (value_address (v
), buf
, src_len
);
2534 v
= allocate_value (type
);
2535 src
= value_contents (obj
) + offset
;
2540 long new_offset
= offset
;
2542 set_value_component_location (v
, obj
);
2543 set_value_bitpos (v
, bit_offset
+ value_bitpos (obj
));
2544 set_value_bitsize (v
, bit_size
);
2545 if (value_bitpos (v
) >= HOST_CHAR_BIT
)
2548 set_value_bitpos (v
, value_bitpos (v
) - HOST_CHAR_BIT
);
2550 set_value_offset (v
, new_offset
);
2552 /* Also set the parent value. This is needed when trying to
2553 assign a new value (in inferior memory). */
2554 set_value_parent (v
, obj
);
2557 set_value_bitsize (v
, bit_size
);
2558 unpacked
= value_contents_writeable (v
);
2562 memset (unpacked
, 0, TYPE_LENGTH (type
));
2566 if (staging
.size () == TYPE_LENGTH (type
))
2568 /* Small short-cut: If we've unpacked the data into a buffer
2569 of the same size as TYPE's length, then we can reuse that,
2570 instead of doing the unpacking again. */
2571 memcpy (unpacked
, staging
.data (), staging
.size ());
2574 ada_unpack_from_contents (src
, bit_offset
, bit_size
,
2575 unpacked
, TYPE_LENGTH (type
),
2576 is_big_endian
, has_negatives (type
), is_scalar
);
2581 /* Store the contents of FROMVAL into the location of TOVAL.
2582 Return a new value with the location of TOVAL and contents of
2583 FROMVAL. Handles assignment into packed fields that have
2584 floating-point or non-scalar types. */
2586 static struct value
*
2587 ada_value_assign (struct value
*toval
, struct value
*fromval
)
2589 struct type
*type
= value_type (toval
);
2590 int bits
= value_bitsize (toval
);
2592 toval
= ada_coerce_ref (toval
);
2593 fromval
= ada_coerce_ref (fromval
);
2595 if (ada_is_direct_array_type (value_type (toval
)))
2596 toval
= ada_coerce_to_simple_array (toval
);
2597 if (ada_is_direct_array_type (value_type (fromval
)))
2598 fromval
= ada_coerce_to_simple_array (fromval
);
2600 if (!deprecated_value_modifiable (toval
))
2601 error (_("Left operand of assignment is not a modifiable lvalue."));
2603 if (VALUE_LVAL (toval
) == lval_memory
2605 && (type
->code () == TYPE_CODE_FLT
2606 || type
->code () == TYPE_CODE_STRUCT
))
2608 int len
= (value_bitpos (toval
)
2609 + bits
+ HOST_CHAR_BIT
- 1) / HOST_CHAR_BIT
;
2611 gdb_byte
*buffer
= (gdb_byte
*) alloca (len
);
2613 CORE_ADDR to_addr
= value_address (toval
);
2615 if (type
->code () == TYPE_CODE_FLT
)
2616 fromval
= value_cast (type
, fromval
);
2618 read_memory (to_addr
, buffer
, len
);
2619 from_size
= value_bitsize (fromval
);
2621 from_size
= TYPE_LENGTH (value_type (fromval
)) * TARGET_CHAR_BIT
;
2623 const int is_big_endian
= type_byte_order (type
) == BFD_ENDIAN_BIG
;
2624 ULONGEST from_offset
= 0;
2625 if (is_big_endian
&& is_scalar_type (value_type (fromval
)))
2626 from_offset
= from_size
- bits
;
2627 copy_bitwise (buffer
, value_bitpos (toval
),
2628 value_contents (fromval
), from_offset
,
2629 bits
, is_big_endian
);
2630 write_memory_with_notification (to_addr
, buffer
, len
);
2632 val
= value_copy (toval
);
2633 memcpy (value_contents_raw (val
), value_contents (fromval
),
2634 TYPE_LENGTH (type
));
2635 deprecated_set_value_type (val
, type
);
2640 return value_assign (toval
, fromval
);
2644 /* Given that COMPONENT is a memory lvalue that is part of the lvalue
2645 CONTAINER, assign the contents of VAL to COMPONENTS's place in
2646 CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not
2647 COMPONENT, and not the inferior's memory. The current contents
2648 of COMPONENT are ignored.
2650 Although not part of the initial design, this function also works
2651 when CONTAINER and COMPONENT are not_lval's: it works as if CONTAINER
2652 had a null address, and COMPONENT had an address which is equal to
2653 its offset inside CONTAINER. */
2656 value_assign_to_component (struct value
*container
, struct value
*component
,
2659 LONGEST offset_in_container
=
2660 (LONGEST
) (value_address (component
) - value_address (container
));
2661 int bit_offset_in_container
=
2662 value_bitpos (component
) - value_bitpos (container
);
2665 val
= value_cast (value_type (component
), val
);
2667 if (value_bitsize (component
) == 0)
2668 bits
= TARGET_CHAR_BIT
* TYPE_LENGTH (value_type (component
));
2670 bits
= value_bitsize (component
);
2672 if (type_byte_order (value_type (container
)) == BFD_ENDIAN_BIG
)
2676 if (is_scalar_type (check_typedef (value_type (component
))))
2678 = TYPE_LENGTH (value_type (component
)) * TARGET_CHAR_BIT
- bits
;
2681 copy_bitwise (value_contents_writeable (container
) + offset_in_container
,
2682 value_bitpos (container
) + bit_offset_in_container
,
2683 value_contents (val
), src_offset
, bits
, 1);
2686 copy_bitwise (value_contents_writeable (container
) + offset_in_container
,
2687 value_bitpos (container
) + bit_offset_in_container
,
2688 value_contents (val
), 0, bits
, 0);
2691 /* Determine if TYPE is an access to an unconstrained array. */
2694 ada_is_access_to_unconstrained_array (struct type
*type
)
2696 return (type
->code () == TYPE_CODE_TYPEDEF
2697 && is_thick_pntr (ada_typedef_target_type (type
)));
2700 /* The value of the element of array ARR at the ARITY indices given in IND.
2701 ARR may be either a simple array, GNAT array descriptor, or pointer
2705 ada_value_subscript (struct value
*arr
, int arity
, struct value
**ind
)
2709 struct type
*elt_type
;
2711 elt
= ada_coerce_to_simple_array (arr
);
2713 elt_type
= ada_check_typedef (value_type (elt
));
2714 if (elt_type
->code () == TYPE_CODE_ARRAY
2715 && TYPE_FIELD_BITSIZE (elt_type
, 0) > 0)
2716 return value_subscript_packed (elt
, arity
, ind
);
2718 for (k
= 0; k
< arity
; k
+= 1)
2720 struct type
*saved_elt_type
= TYPE_TARGET_TYPE (elt_type
);
2722 if (elt_type
->code () != TYPE_CODE_ARRAY
)
2723 error (_("too many subscripts (%d expected)"), k
);
2725 elt
= value_subscript (elt
, pos_atr (ind
[k
]));
2727 if (ada_is_access_to_unconstrained_array (saved_elt_type
)
2728 && value_type (elt
)->code () != TYPE_CODE_TYPEDEF
)
2730 /* The element is a typedef to an unconstrained array,
2731 except that the value_subscript call stripped the
2732 typedef layer. The typedef layer is GNAT's way to
2733 specify that the element is, at the source level, an
2734 access to the unconstrained array, rather than the
2735 unconstrained array. So, we need to restore that
2736 typedef layer, which we can do by forcing the element's
2737 type back to its original type. Otherwise, the returned
2738 value is going to be printed as the array, rather
2739 than as an access. Another symptom of the same issue
2740 would be that an expression trying to dereference the
2741 element would also be improperly rejected. */
2742 deprecated_set_value_type (elt
, saved_elt_type
);
2745 elt_type
= ada_check_typedef (value_type (elt
));
2751 /* Assuming ARR is a pointer to a GDB array, the value of the element
2752 of *ARR at the ARITY indices given in IND.
2753 Does not read the entire array into memory.
2755 Note: Unlike what one would expect, this function is used instead of
2756 ada_value_subscript for basically all non-packed array types. The reason
2757 for this is that a side effect of doing our own pointer arithmetics instead
2758 of relying on value_subscript is that there is no implicit typedef peeling.
2759 This is important for arrays of array accesses, where it allows us to
2760 preserve the fact that the array's element is an array access, where the
2761 access part os encoded in a typedef layer. */
2763 static struct value
*
2764 ada_value_ptr_subscript (struct value
*arr
, int arity
, struct value
**ind
)
2767 struct value
*array_ind
= ada_value_ind (arr
);
2769 = check_typedef (value_enclosing_type (array_ind
));
2771 if (type
->code () == TYPE_CODE_ARRAY
2772 && TYPE_FIELD_BITSIZE (type
, 0) > 0)
2773 return value_subscript_packed (array_ind
, arity
, ind
);
2775 for (k
= 0; k
< arity
; k
+= 1)
2778 struct value
*lwb_value
;
2780 if (type
->code () != TYPE_CODE_ARRAY
)
2781 error (_("too many subscripts (%d expected)"), k
);
2782 arr
= value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type
)),
2784 get_discrete_bounds (TYPE_INDEX_TYPE (type
), &lwb
, &upb
);
2785 lwb_value
= value_from_longest (value_type (ind
[k
]), lwb
);
2786 arr
= value_ptradd (arr
, pos_atr (ind
[k
]) - pos_atr (lwb_value
));
2787 type
= TYPE_TARGET_TYPE (type
);
2790 return value_ind (arr
);
2793 /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the
2794 actual type of ARRAY_PTR is ignored), returns the Ada slice of
2795 HIGH'Pos-LOW'Pos+1 elements starting at index LOW. The lower bound of
2796 this array is LOW, as per Ada rules. */
2797 static struct value
*
2798 ada_value_slice_from_ptr (struct value
*array_ptr
, struct type
*type
,
2801 struct type
*type0
= ada_check_typedef (type
);
2802 struct type
*base_index_type
= TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type0
));
2803 struct type
*index_type
2804 = create_static_range_type (NULL
, base_index_type
, low
, high
);
2805 struct type
*slice_type
= create_array_type_with_stride
2806 (NULL
, TYPE_TARGET_TYPE (type0
), index_type
,
2807 type0
->dyn_prop (DYN_PROP_BYTE_STRIDE
),
2808 TYPE_FIELD_BITSIZE (type0
, 0));
2809 int base_low
= ada_discrete_type_low_bound (TYPE_INDEX_TYPE (type0
));
2810 LONGEST base_low_pos
, low_pos
;
2813 if (!discrete_position (base_index_type
, low
, &low_pos
)
2814 || !discrete_position (base_index_type
, base_low
, &base_low_pos
))
2816 warning (_("unable to get positions in slice, use bounds instead"));
2818 base_low_pos
= base_low
;
2821 base
= value_as_address (array_ptr
)
2822 + ((low_pos
- base_low_pos
)
2823 * TYPE_LENGTH (TYPE_TARGET_TYPE (type0
)));
2824 return value_at_lazy (slice_type
, base
);
2828 static struct value
*
2829 ada_value_slice (struct value
*array
, int low
, int high
)
2831 struct type
*type
= ada_check_typedef (value_type (array
));
2832 struct type
*base_index_type
= TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type
));
2833 struct type
*index_type
2834 = create_static_range_type (NULL
, TYPE_INDEX_TYPE (type
), low
, high
);
2835 struct type
*slice_type
= create_array_type_with_stride
2836 (NULL
, TYPE_TARGET_TYPE (type
), index_type
,
2837 type
->dyn_prop (DYN_PROP_BYTE_STRIDE
),
2838 TYPE_FIELD_BITSIZE (type
, 0));
2839 LONGEST low_pos
, high_pos
;
2841 if (!discrete_position (base_index_type
, low
, &low_pos
)
2842 || !discrete_position (base_index_type
, high
, &high_pos
))
2844 warning (_("unable to get positions in slice, use bounds instead"));
2849 return value_cast (slice_type
,
2850 value_slice (array
, low
, high_pos
- low_pos
+ 1));
2853 /* If type is a record type in the form of a standard GNAT array
2854 descriptor, returns the number of dimensions for type. If arr is a
2855 simple array, returns the number of "array of"s that prefix its
2856 type designation. Otherwise, returns 0. */
2859 ada_array_arity (struct type
*type
)
2866 type
= desc_base_type (type
);
2869 if (type
->code () == TYPE_CODE_STRUCT
)
2870 return desc_arity (desc_bounds_type (type
));
2872 while (type
->code () == TYPE_CODE_ARRAY
)
2875 type
= ada_check_typedef (TYPE_TARGET_TYPE (type
));
2881 /* If TYPE is a record type in the form of a standard GNAT array
2882 descriptor or a simple array type, returns the element type for
2883 TYPE after indexing by NINDICES indices, or by all indices if
2884 NINDICES is -1. Otherwise, returns NULL. */
2887 ada_array_element_type (struct type
*type
, int nindices
)
2889 type
= desc_base_type (type
);
2891 if (type
->code () == TYPE_CODE_STRUCT
)
2894 struct type
*p_array_type
;
2896 p_array_type
= desc_data_target_type (type
);
2898 k
= ada_array_arity (type
);
2902 /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */
2903 if (nindices
>= 0 && k
> nindices
)
2905 while (k
> 0 && p_array_type
!= NULL
)
2907 p_array_type
= ada_check_typedef (TYPE_TARGET_TYPE (p_array_type
));
2910 return p_array_type
;
2912 else if (type
->code () == TYPE_CODE_ARRAY
)
2914 while (nindices
!= 0 && type
->code () == TYPE_CODE_ARRAY
)
2916 type
= TYPE_TARGET_TYPE (type
);
2925 /* The type of nth index in arrays of given type (n numbering from 1).
2926 Does not examine memory. Throws an error if N is invalid or TYPE
2927 is not an array type. NAME is the name of the Ada attribute being
2928 evaluated ('range, 'first, 'last, or 'length); it is used in building
2929 the error message. */
2931 static struct type
*
2932 ada_index_type (struct type
*type
, int n
, const char *name
)
2934 struct type
*result_type
;
2936 type
= desc_base_type (type
);
2938 if (n
< 0 || n
> ada_array_arity (type
))
2939 error (_("invalid dimension number to '%s"), name
);
2941 if (ada_is_simple_array_type (type
))
2945 for (i
= 1; i
< n
; i
+= 1)
2946 type
= TYPE_TARGET_TYPE (type
);
2947 result_type
= TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type
));
2948 /* FIXME: The stabs type r(0,0);bound;bound in an array type
2949 has a target type of TYPE_CODE_UNDEF. We compensate here, but
2950 perhaps stabsread.c would make more sense. */
2951 if (result_type
&& result_type
->code () == TYPE_CODE_UNDEF
)
2956 result_type
= desc_index_type (desc_bounds_type (type
), n
);
2957 if (result_type
== NULL
)
2958 error (_("attempt to take bound of something that is not an array"));
2964 /* Given that arr is an array type, returns the lower bound of the
2965 Nth index (numbering from 1) if WHICH is 0, and the upper bound if
2966 WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an
2967 array-descriptor type. It works for other arrays with bounds supplied
2968 by run-time quantities other than discriminants. */
2971 ada_array_bound_from_type (struct type
*arr_type
, int n
, int which
)
2973 struct type
*type
, *index_type_desc
, *index_type
;
2976 gdb_assert (which
== 0 || which
== 1);
2978 if (ada_is_constrained_packed_array_type (arr_type
))
2979 arr_type
= decode_constrained_packed_array_type (arr_type
);
2981 if (arr_type
== NULL
|| !ada_is_simple_array_type (arr_type
))
2982 return (LONGEST
) - which
;
2984 if (arr_type
->code () == TYPE_CODE_PTR
)
2985 type
= TYPE_TARGET_TYPE (arr_type
);
2989 if (TYPE_FIXED_INSTANCE (type
))
2991 /* The array has already been fixed, so we do not need to
2992 check the parallel ___XA type again. That encoding has
2993 already been applied, so ignore it now. */
2994 index_type_desc
= NULL
;
2998 index_type_desc
= ada_find_parallel_type (type
, "___XA");
2999 ada_fixup_array_indexes_type (index_type_desc
);
3002 if (index_type_desc
!= NULL
)
3003 index_type
= to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc
, n
- 1),
3007 struct type
*elt_type
= check_typedef (type
);
3009 for (i
= 1; i
< n
; i
++)
3010 elt_type
= check_typedef (TYPE_TARGET_TYPE (elt_type
));
3012 index_type
= TYPE_INDEX_TYPE (elt_type
);
3016 (LONGEST
) (which
== 0
3017 ? ada_discrete_type_low_bound (index_type
)
3018 : ada_discrete_type_high_bound (index_type
));
3021 /* Given that arr is an array value, returns the lower bound of the
3022 nth index (numbering from 1) if WHICH is 0, and the upper bound if
3023 WHICH is 1. This routine will also work for arrays with bounds
3024 supplied by run-time quantities other than discriminants. */
3027 ada_array_bound (struct value
*arr
, int n
, int which
)
3029 struct type
*arr_type
;
3031 if (check_typedef (value_type (arr
))->code () == TYPE_CODE_PTR
)
3032 arr
= value_ind (arr
);
3033 arr_type
= value_enclosing_type (arr
);
3035 if (ada_is_constrained_packed_array_type (arr_type
))
3036 return ada_array_bound (decode_constrained_packed_array (arr
), n
, which
);
3037 else if (ada_is_simple_array_type (arr_type
))
3038 return ada_array_bound_from_type (arr_type
, n
, which
);
3040 return value_as_long (desc_one_bound (desc_bounds (arr
), n
, which
));
3043 /* Given that arr is an array value, returns the length of the
3044 nth index. This routine will also work for arrays with bounds
3045 supplied by run-time quantities other than discriminants.
3046 Does not work for arrays indexed by enumeration types with representation
3047 clauses at the moment. */
3050 ada_array_length (struct value
*arr
, int n
)
3052 struct type
*arr_type
, *index_type
;
3055 if (check_typedef (value_type (arr
))->code () == TYPE_CODE_PTR
)
3056 arr
= value_ind (arr
);
3057 arr_type
= value_enclosing_type (arr
);
3059 if (ada_is_constrained_packed_array_type (arr_type
))
3060 return ada_array_length (decode_constrained_packed_array (arr
), n
);
3062 if (ada_is_simple_array_type (arr_type
))
3064 low
= ada_array_bound_from_type (arr_type
, n
, 0);
3065 high
= ada_array_bound_from_type (arr_type
, n
, 1);
3069 low
= value_as_long (desc_one_bound (desc_bounds (arr
), n
, 0));
3070 high
= value_as_long (desc_one_bound (desc_bounds (arr
), n
, 1));
3073 arr_type
= check_typedef (arr_type
);
3074 index_type
= ada_index_type (arr_type
, n
, "length");
3075 if (index_type
!= NULL
)
3077 struct type
*base_type
;
3078 if (index_type
->code () == TYPE_CODE_RANGE
)
3079 base_type
= TYPE_TARGET_TYPE (index_type
);
3081 base_type
= index_type
;
3083 low
= pos_atr (value_from_longest (base_type
, low
));
3084 high
= pos_atr (value_from_longest (base_type
, high
));
3086 return high
- low
+ 1;
3089 /* An array whose type is that of ARR_TYPE (an array type), with
3090 bounds LOW to HIGH, but whose contents are unimportant. If HIGH is
3091 less than LOW, then LOW-1 is used. */
3093 static struct value
*
3094 empty_array (struct type
*arr_type
, int low
, int high
)
3096 struct type
*arr_type0
= ada_check_typedef (arr_type
);
3097 struct type
*index_type
3098 = create_static_range_type
3099 (NULL
, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type0
)), low
,
3100 high
< low
? low
- 1 : high
);
3101 struct type
*elt_type
= ada_array_element_type (arr_type0
, 1);
3103 return allocate_value (create_array_type (NULL
, elt_type
, index_type
));
3107 /* Name resolution */
3109 /* The "decoded" name for the user-definable Ada operator corresponding
3113 ada_decoded_op_name (enum exp_opcode op
)
3117 for (i
= 0; ada_opname_table
[i
].encoded
!= NULL
; i
+= 1)
3119 if (ada_opname_table
[i
].op
== op
)
3120 return ada_opname_table
[i
].decoded
;
3122 error (_("Could not find operator name for opcode"));
3125 /* Returns true (non-zero) iff decoded name N0 should appear before N1
3126 in a listing of choices during disambiguation (see sort_choices, below).
3127 The idea is that overloadings of a subprogram name from the
3128 same package should sort in their source order. We settle for ordering
3129 such symbols by their trailing number (__N or $N). */
3132 encoded_ordered_before (const char *N0
, const char *N1
)
3136 else if (N0
== NULL
)
3142 for (k0
= strlen (N0
) - 1; k0
> 0 && isdigit (N0
[k0
]); k0
-= 1)
3144 for (k1
= strlen (N1
) - 1; k1
> 0 && isdigit (N1
[k1
]); k1
-= 1)
3146 if ((N0
[k0
] == '_' || N0
[k0
] == '$') && N0
[k0
+ 1] != '\000'
3147 && (N1
[k1
] == '_' || N1
[k1
] == '$') && N1
[k1
+ 1] != '\000')
3152 while (N0
[n0
] == '_' && n0
> 0 && N0
[n0
- 1] == '_')
3155 while (N1
[n1
] == '_' && n1
> 0 && N1
[n1
- 1] == '_')
3157 if (n0
== n1
&& strncmp (N0
, N1
, n0
) == 0)
3158 return (atoi (N0
+ k0
+ 1) < atoi (N1
+ k1
+ 1));
3160 return (strcmp (N0
, N1
) < 0);
3164 /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the
3168 sort_choices (struct block_symbol syms
[], int nsyms
)
3172 for (i
= 1; i
< nsyms
; i
+= 1)
3174 struct block_symbol sym
= syms
[i
];
3177 for (j
= i
- 1; j
>= 0; j
-= 1)
3179 if (encoded_ordered_before (syms
[j
].symbol
->linkage_name (),
3180 sym
.symbol
->linkage_name ()))
3182 syms
[j
+ 1] = syms
[j
];
3188 /* Whether GDB should display formals and return types for functions in the
3189 overloads selection menu. */
3190 static bool print_signatures
= true;
3192 /* Print the signature for SYM on STREAM according to the FLAGS options. For
3193 all but functions, the signature is just the name of the symbol. For
3194 functions, this is the name of the function, the list of types for formals
3195 and the return type (if any). */
3198 ada_print_symbol_signature (struct ui_file
*stream
, struct symbol
*sym
,
3199 const struct type_print_options
*flags
)
3201 struct type
*type
= SYMBOL_TYPE (sym
);
3203 fprintf_filtered (stream
, "%s", sym
->print_name ());
3204 if (!print_signatures
3206 || type
->code () != TYPE_CODE_FUNC
)
3209 if (TYPE_NFIELDS (type
) > 0)
3213 fprintf_filtered (stream
, " (");
3214 for (i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
3217 fprintf_filtered (stream
, "; ");
3218 ada_print_type (TYPE_FIELD_TYPE (type
, i
), NULL
, stream
, -1, 0,
3221 fprintf_filtered (stream
, ")");
3223 if (TYPE_TARGET_TYPE (type
) != NULL
3224 && TYPE_TARGET_TYPE (type
)->code () != TYPE_CODE_VOID
)
3226 fprintf_filtered (stream
, " return ");
3227 ada_print_type (TYPE_TARGET_TYPE (type
), NULL
, stream
, -1, 0, flags
);
3231 /* Read and validate a set of numeric choices from the user in the
3232 range 0 .. N_CHOICES-1. Place the results in increasing
3233 order in CHOICES[0 .. N-1], and return N.
3235 The user types choices as a sequence of numbers on one line
3236 separated by blanks, encoding them as follows:
3238 + A choice of 0 means to cancel the selection, throwing an error.
3239 + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1.
3240 + The user chooses k by typing k+IS_ALL_CHOICE+1.
3242 The user is not allowed to choose more than MAX_RESULTS values.
3244 ANNOTATION_SUFFIX, if present, is used to annotate the input
3245 prompts (for use with the -f switch). */
3248 get_selections (int *choices
, int n_choices
, int max_results
,
3249 int is_all_choice
, const char *annotation_suffix
)
3254 int first_choice
= is_all_choice
? 2 : 1;
3256 prompt
= getenv ("PS2");
3260 args
= command_line_input (prompt
, annotation_suffix
);
3263 error_no_arg (_("one or more choice numbers"));
3267 /* Set choices[0 .. n_chosen-1] to the users' choices in ascending
3268 order, as given in args. Choices are validated. */
3274 args
= skip_spaces (args
);
3275 if (*args
== '\0' && n_chosen
== 0)
3276 error_no_arg (_("one or more choice numbers"));
3277 else if (*args
== '\0')
3280 choice
= strtol (args
, &args2
, 10);
3281 if (args
== args2
|| choice
< 0
3282 || choice
> n_choices
+ first_choice
- 1)
3283 error (_("Argument must be choice number"));
3287 error (_("cancelled"));
3289 if (choice
< first_choice
)
3291 n_chosen
= n_choices
;
3292 for (j
= 0; j
< n_choices
; j
+= 1)
3296 choice
-= first_choice
;
3298 for (j
= n_chosen
- 1; j
>= 0 && choice
< choices
[j
]; j
-= 1)
3302 if (j
< 0 || choice
!= choices
[j
])
3306 for (k
= n_chosen
- 1; k
> j
; k
-= 1)
3307 choices
[k
+ 1] = choices
[k
];
3308 choices
[j
+ 1] = choice
;
3313 if (n_chosen
> max_results
)
3314 error (_("Select no more than %d of the above"), max_results
);
3319 /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0
3320 by asking the user (if necessary), returning the number selected,
3321 and setting the first elements of SYMS items. Error if no symbols
3324 /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought
3325 to be re-integrated one of these days. */
3328 user_select_syms (struct block_symbol
*syms
, int nsyms
, int max_results
)
3331 int *chosen
= XALLOCAVEC (int , nsyms
);
3333 int first_choice
= (max_results
== 1) ? 1 : 2;
3334 const char *select_mode
= multiple_symbols_select_mode ();
3336 if (max_results
< 1)
3337 error (_("Request to select 0 symbols!"));
3341 if (select_mode
== multiple_symbols_cancel
)
3343 canceled because the command is ambiguous\n\
3344 See set/show multiple-symbol."));
3346 /* If select_mode is "all", then return all possible symbols.
3347 Only do that if more than one symbol can be selected, of course.
3348 Otherwise, display the menu as usual. */
3349 if (select_mode
== multiple_symbols_all
&& max_results
> 1)
3352 printf_filtered (_("[0] cancel\n"));
3353 if (max_results
> 1)
3354 printf_filtered (_("[1] all\n"));
3356 sort_choices (syms
, nsyms
);
3358 for (i
= 0; i
< nsyms
; i
+= 1)
3360 if (syms
[i
].symbol
== NULL
)
3363 if (SYMBOL_CLASS (syms
[i
].symbol
) == LOC_BLOCK
)
3365 struct symtab_and_line sal
=
3366 find_function_start_sal (syms
[i
].symbol
, 1);
3368 printf_filtered ("[%d] ", i
+ first_choice
);
3369 ada_print_symbol_signature (gdb_stdout
, syms
[i
].symbol
,
3370 &type_print_raw_options
);
3371 if (sal
.symtab
== NULL
)
3372 printf_filtered (_(" at %p[<no source file available>%p]:%d\n"),
3373 metadata_style
.style ().ptr (), nullptr, sal
.line
);
3377 styled_string (file_name_style
.style (),
3378 symtab_to_filename_for_display (sal
.symtab
)),
3385 (SYMBOL_CLASS (syms
[i
].symbol
) == LOC_CONST
3386 && SYMBOL_TYPE (syms
[i
].symbol
) != NULL
3387 && SYMBOL_TYPE (syms
[i
].symbol
)->code () == TYPE_CODE_ENUM
);
3388 struct symtab
*symtab
= NULL
;
3390 if (SYMBOL_OBJFILE_OWNED (syms
[i
].symbol
))
3391 symtab
= symbol_symtab (syms
[i
].symbol
);
3393 if (SYMBOL_LINE (syms
[i
].symbol
) != 0 && symtab
!= NULL
)
3395 printf_filtered ("[%d] ", i
+ first_choice
);
3396 ada_print_symbol_signature (gdb_stdout
, syms
[i
].symbol
,
3397 &type_print_raw_options
);
3398 printf_filtered (_(" at %s:%d\n"),
3399 symtab_to_filename_for_display (symtab
),
3400 SYMBOL_LINE (syms
[i
].symbol
));
3402 else if (is_enumeral
3403 && SYMBOL_TYPE (syms
[i
].symbol
)->name () != NULL
)
3405 printf_filtered (("[%d] "), i
+ first_choice
);
3406 ada_print_type (SYMBOL_TYPE (syms
[i
].symbol
), NULL
,
3407 gdb_stdout
, -1, 0, &type_print_raw_options
);
3408 printf_filtered (_("'(%s) (enumeral)\n"),
3409 syms
[i
].symbol
->print_name ());
3413 printf_filtered ("[%d] ", i
+ first_choice
);
3414 ada_print_symbol_signature (gdb_stdout
, syms
[i
].symbol
,
3415 &type_print_raw_options
);
3418 printf_filtered (is_enumeral
3419 ? _(" in %s (enumeral)\n")
3421 symtab_to_filename_for_display (symtab
));
3423 printf_filtered (is_enumeral
3424 ? _(" (enumeral)\n")
3430 n_chosen
= get_selections (chosen
, nsyms
, max_results
, max_results
> 1,
3433 for (i
= 0; i
< n_chosen
; i
+= 1)
3434 syms
[i
] = syms
[chosen
[i
]];
3439 /* Same as evaluate_type (*EXP), but resolves ambiguous symbol
3440 references (marked by OP_VAR_VALUE nodes in which the symbol has an
3441 undefined namespace) and converts operators that are
3442 user-defined into appropriate function calls. If CONTEXT_TYPE is
3443 non-null, it provides a preferred result type [at the moment, only
3444 type void has any effect---causing procedures to be preferred over
3445 functions in calls]. A null CONTEXT_TYPE indicates that a non-void
3446 return type is preferred. May change (expand) *EXP. */
3449 resolve (expression_up
*expp
, int void_context_p
, int parse_completion
,
3450 innermost_block_tracker
*tracker
)
3452 struct type
*context_type
= NULL
;
3456 context_type
= builtin_type ((*expp
)->gdbarch
)->builtin_void
;
3458 resolve_subexp (expp
, &pc
, 1, context_type
, parse_completion
, tracker
);
3461 /* Resolve the operator of the subexpression beginning at
3462 position *POS of *EXPP. "Resolving" consists of replacing
3463 the symbols that have undefined namespaces in OP_VAR_VALUE nodes
3464 with their resolutions, replacing built-in operators with
3465 function calls to user-defined operators, where appropriate, and,
3466 when DEPROCEDURE_P is non-zero, converting function-valued variables
3467 into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions
3468 are as in ada_resolve, above. */
3470 static struct value
*
3471 resolve_subexp (expression_up
*expp
, int *pos
, int deprocedure_p
,
3472 struct type
*context_type
, int parse_completion
,
3473 innermost_block_tracker
*tracker
)
3477 struct expression
*exp
; /* Convenience: == *expp. */
3478 enum exp_opcode op
= (*expp
)->elts
[pc
].opcode
;
3479 struct value
**argvec
; /* Vector of operand types (alloca'ed). */
3480 int nargs
; /* Number of operands. */
3487 /* Pass one: resolve operands, saving their types and updating *pos,
3492 if (exp
->elts
[pc
+ 3].opcode
== OP_VAR_VALUE
3493 && SYMBOL_DOMAIN (exp
->elts
[pc
+ 5].symbol
) == UNDEF_DOMAIN
)
3498 resolve_subexp (expp
, pos
, 0, NULL
, parse_completion
, tracker
);
3500 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
3505 resolve_subexp (expp
, pos
, 0, NULL
, parse_completion
, tracker
);
3510 resolve_subexp (expp
, pos
, 1, check_typedef (exp
->elts
[pc
+ 1].type
),
3511 parse_completion
, tracker
);
3514 case OP_ATR_MODULUS
:
3524 case TERNOP_IN_RANGE
:
3525 case BINOP_IN_BOUNDS
:
3531 case OP_DISCRETE_RANGE
:
3533 ada_forward_operator_length (exp
, pc
, &oplen
, &nargs
);
3542 arg1
= resolve_subexp (expp
, pos
, 0, NULL
, parse_completion
, tracker
);
3544 resolve_subexp (expp
, pos
, 1, NULL
, parse_completion
, tracker
);
3546 resolve_subexp (expp
, pos
, 1, value_type (arg1
), parse_completion
,
3564 case BINOP_LOGICAL_AND
:
3565 case BINOP_LOGICAL_OR
:
3566 case BINOP_BITWISE_AND
:
3567 case BINOP_BITWISE_IOR
:
3568 case BINOP_BITWISE_XOR
:
3571 case BINOP_NOTEQUAL
:
3578 case BINOP_SUBSCRIPT
:
3586 case UNOP_LOGICAL_NOT
:
3596 case OP_VAR_MSYM_VALUE
:
3603 case OP_INTERNALVAR
:
3613 *pos
+= 4 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
3616 case STRUCTOP_STRUCT
:
3617 *pos
+= 4 + BYTES_TO_EXP_ELEM (exp
->elts
[pc
+ 1].longconst
+ 1);
3630 error (_("Unexpected operator during name resolution"));
3633 argvec
= XALLOCAVEC (struct value
*, nargs
+ 1);
3634 for (i
= 0; i
< nargs
; i
+= 1)
3635 argvec
[i
] = resolve_subexp (expp
, pos
, 1, NULL
, parse_completion
,
3640 /* Pass two: perform any resolution on principal operator. */
3647 if (SYMBOL_DOMAIN (exp
->elts
[pc
+ 2].symbol
) == UNDEF_DOMAIN
)
3649 std::vector
<struct block_symbol
> candidates
;
3653 ada_lookup_symbol_list (exp
->elts
[pc
+ 2].symbol
->linkage_name (),
3654 exp
->elts
[pc
+ 1].block
, VAR_DOMAIN
,
3657 if (n_candidates
> 1)
3659 /* Types tend to get re-introduced locally, so if there
3660 are any local symbols that are not types, first filter
3663 for (j
= 0; j
< n_candidates
; j
+= 1)
3664 switch (SYMBOL_CLASS (candidates
[j
].symbol
))
3669 case LOC_REGPARM_ADDR
:
3677 if (j
< n_candidates
)
3680 while (j
< n_candidates
)
3682 if (SYMBOL_CLASS (candidates
[j
].symbol
) == LOC_TYPEDEF
)
3684 candidates
[j
] = candidates
[n_candidates
- 1];
3693 if (n_candidates
== 0)
3694 error (_("No definition found for %s"),
3695 exp
->elts
[pc
+ 2].symbol
->print_name ());
3696 else if (n_candidates
== 1)
3698 else if (deprocedure_p
3699 && !is_nonfunction (candidates
.data (), n_candidates
))
3701 i
= ada_resolve_function
3702 (candidates
.data (), n_candidates
, NULL
, 0,
3703 exp
->elts
[pc
+ 2].symbol
->linkage_name (),
3704 context_type
, parse_completion
);
3706 error (_("Could not find a match for %s"),
3707 exp
->elts
[pc
+ 2].symbol
->print_name ());
3711 printf_filtered (_("Multiple matches for %s\n"),
3712 exp
->elts
[pc
+ 2].symbol
->print_name ());
3713 user_select_syms (candidates
.data (), n_candidates
, 1);
3717 exp
->elts
[pc
+ 1].block
= candidates
[i
].block
;
3718 exp
->elts
[pc
+ 2].symbol
= candidates
[i
].symbol
;
3719 tracker
->update (candidates
[i
]);
3723 && (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
)->code ()
3726 replace_operator_with_call (expp
, pc
, 0, 4,
3727 exp
->elts
[pc
+ 2].symbol
,
3728 exp
->elts
[pc
+ 1].block
);
3735 if (exp
->elts
[pc
+ 3].opcode
== OP_VAR_VALUE
3736 && SYMBOL_DOMAIN (exp
->elts
[pc
+ 5].symbol
) == UNDEF_DOMAIN
)
3738 std::vector
<struct block_symbol
> candidates
;
3742 ada_lookup_symbol_list (exp
->elts
[pc
+ 5].symbol
->linkage_name (),
3743 exp
->elts
[pc
+ 4].block
, VAR_DOMAIN
,
3746 if (n_candidates
== 1)
3750 i
= ada_resolve_function
3751 (candidates
.data (), n_candidates
,
3753 exp
->elts
[pc
+ 5].symbol
->linkage_name (),
3754 context_type
, parse_completion
);
3756 error (_("Could not find a match for %s"),
3757 exp
->elts
[pc
+ 5].symbol
->print_name ());
3760 exp
->elts
[pc
+ 4].block
= candidates
[i
].block
;
3761 exp
->elts
[pc
+ 5].symbol
= candidates
[i
].symbol
;
3762 tracker
->update (candidates
[i
]);
3773 case BINOP_BITWISE_AND
:
3774 case BINOP_BITWISE_IOR
:
3775 case BINOP_BITWISE_XOR
:
3777 case BINOP_NOTEQUAL
:
3785 case UNOP_LOGICAL_NOT
:
3787 if (possible_user_operator_p (op
, argvec
))
3789 std::vector
<struct block_symbol
> candidates
;
3793 ada_lookup_symbol_list (ada_decoded_op_name (op
),
3797 i
= ada_resolve_function (candidates
.data (), n_candidates
, argvec
,
3798 nargs
, ada_decoded_op_name (op
), NULL
,
3803 replace_operator_with_call (expp
, pc
, nargs
, 1,
3804 candidates
[i
].symbol
,
3805 candidates
[i
].block
);
3816 if (exp
->elts
[pc
].opcode
== OP_VAR_MSYM_VALUE
)
3817 return evaluate_var_msym_value (EVAL_AVOID_SIDE_EFFECTS
,
3818 exp
->elts
[pc
+ 1].objfile
,
3819 exp
->elts
[pc
+ 2].msymbol
);
3821 return evaluate_subexp_type (exp
, pos
);
3824 /* Return non-zero if formal type FTYPE matches actual type ATYPE. If
3825 MAY_DEREF is non-zero, the formal may be a pointer and the actual
3827 /* The term "match" here is rather loose. The match is heuristic and
3831 ada_type_match (struct type
*ftype
, struct type
*atype
, int may_deref
)
3833 ftype
= ada_check_typedef (ftype
);
3834 atype
= ada_check_typedef (atype
);
3836 if (ftype
->code () == TYPE_CODE_REF
)
3837 ftype
= TYPE_TARGET_TYPE (ftype
);
3838 if (atype
->code () == TYPE_CODE_REF
)
3839 atype
= TYPE_TARGET_TYPE (atype
);
3841 switch (ftype
->code ())
3844 return ftype
->code () == atype
->code ();
3846 if (atype
->code () == TYPE_CODE_PTR
)
3847 return ada_type_match (TYPE_TARGET_TYPE (ftype
),
3848 TYPE_TARGET_TYPE (atype
), 0);
3851 && ada_type_match (TYPE_TARGET_TYPE (ftype
), atype
, 0));
3853 case TYPE_CODE_ENUM
:
3854 case TYPE_CODE_RANGE
:
3855 switch (atype
->code ())
3858 case TYPE_CODE_ENUM
:
3859 case TYPE_CODE_RANGE
:
3865 case TYPE_CODE_ARRAY
:
3866 return (atype
->code () == TYPE_CODE_ARRAY
3867 || ada_is_array_descriptor_type (atype
));
3869 case TYPE_CODE_STRUCT
:
3870 if (ada_is_array_descriptor_type (ftype
))
3871 return (atype
->code () == TYPE_CODE_ARRAY
3872 || ada_is_array_descriptor_type (atype
));
3874 return (atype
->code () == TYPE_CODE_STRUCT
3875 && !ada_is_array_descriptor_type (atype
));
3877 case TYPE_CODE_UNION
:
3879 return (atype
->code () == ftype
->code ());
3883 /* Return non-zero if the formals of FUNC "sufficiently match" the
3884 vector of actual argument types ACTUALS of size N_ACTUALS. FUNC
3885 may also be an enumeral, in which case it is treated as a 0-
3886 argument function. */
3889 ada_args_match (struct symbol
*func
, struct value
**actuals
, int n_actuals
)
3892 struct type
*func_type
= SYMBOL_TYPE (func
);
3894 if (SYMBOL_CLASS (func
) == LOC_CONST
3895 && func_type
->code () == TYPE_CODE_ENUM
)
3896 return (n_actuals
== 0);
3897 else if (func_type
== NULL
|| func_type
->code () != TYPE_CODE_FUNC
)
3900 if (TYPE_NFIELDS (func_type
) != n_actuals
)
3903 for (i
= 0; i
< n_actuals
; i
+= 1)
3905 if (actuals
[i
] == NULL
)
3909 struct type
*ftype
= ada_check_typedef (TYPE_FIELD_TYPE (func_type
,
3911 struct type
*atype
= ada_check_typedef (value_type (actuals
[i
]));
3913 if (!ada_type_match (ftype
, atype
, 1))
3920 /* False iff function type FUNC_TYPE definitely does not produce a value
3921 compatible with type CONTEXT_TYPE. Conservatively returns 1 if
3922 FUNC_TYPE is not a valid function type with a non-null return type
3923 or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */
3926 return_match (struct type
*func_type
, struct type
*context_type
)
3928 struct type
*return_type
;
3930 if (func_type
== NULL
)
3933 if (func_type
->code () == TYPE_CODE_FUNC
)
3934 return_type
= get_base_type (TYPE_TARGET_TYPE (func_type
));
3936 return_type
= get_base_type (func_type
);
3937 if (return_type
== NULL
)
3940 context_type
= get_base_type (context_type
);
3942 if (return_type
->code () == TYPE_CODE_ENUM
)
3943 return context_type
== NULL
|| return_type
== context_type
;
3944 else if (context_type
== NULL
)
3945 return return_type
->code () != TYPE_CODE_VOID
;
3947 return return_type
->code () == context_type
->code ();
3951 /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the
3952 function (if any) that matches the types of the NARGS arguments in
3953 ARGS. If CONTEXT_TYPE is non-null and there is at least one match
3954 that returns that type, then eliminate matches that don't. If
3955 CONTEXT_TYPE is void and there is at least one match that does not
3956 return void, eliminate all matches that do.
3958 Asks the user if there is more than one match remaining. Returns -1
3959 if there is no such symbol or none is selected. NAME is used
3960 solely for messages. May re-arrange and modify SYMS in
3961 the process; the index returned is for the modified vector. */
3964 ada_resolve_function (struct block_symbol syms
[],
3965 int nsyms
, struct value
**args
, int nargs
,
3966 const char *name
, struct type
*context_type
,
3967 int parse_completion
)
3971 int m
; /* Number of hits */
3974 /* In the first pass of the loop, we only accept functions matching
3975 context_type. If none are found, we add a second pass of the loop
3976 where every function is accepted. */
3977 for (fallback
= 0; m
== 0 && fallback
< 2; fallback
++)
3979 for (k
= 0; k
< nsyms
; k
+= 1)
3981 struct type
*type
= ada_check_typedef (SYMBOL_TYPE (syms
[k
].symbol
));
3983 if (ada_args_match (syms
[k
].symbol
, args
, nargs
)
3984 && (fallback
|| return_match (type
, context_type
)))
3992 /* If we got multiple matches, ask the user which one to use. Don't do this
3993 interactive thing during completion, though, as the purpose of the
3994 completion is providing a list of all possible matches. Prompting the
3995 user to filter it down would be completely unexpected in this case. */
3998 else if (m
> 1 && !parse_completion
)
4000 printf_filtered (_("Multiple matches for %s\n"), name
);
4001 user_select_syms (syms
, m
, 1);
4007 /* Replace the operator of length OPLEN at position PC in *EXPP with a call
4008 on the function identified by SYM and BLOCK, and taking NARGS
4009 arguments. Update *EXPP as needed to hold more space. */
4012 replace_operator_with_call (expression_up
*expp
, int pc
, int nargs
,
4013 int oplen
, struct symbol
*sym
,
4014 const struct block
*block
)
4016 /* A new expression, with 6 more elements (3 for funcall, 4 for function
4017 symbol, -oplen for operator being replaced). */
4018 struct expression
*newexp
= (struct expression
*)
4019 xzalloc (sizeof (struct expression
)
4020 + EXP_ELEM_TO_BYTES ((*expp
)->nelts
+ 7 - oplen
));
4021 struct expression
*exp
= expp
->get ();
4023 newexp
->nelts
= exp
->nelts
+ 7 - oplen
;
4024 newexp
->language_defn
= exp
->language_defn
;
4025 newexp
->gdbarch
= exp
->gdbarch
;
4026 memcpy (newexp
->elts
, exp
->elts
, EXP_ELEM_TO_BYTES (pc
));
4027 memcpy (newexp
->elts
+ pc
+ 7, exp
->elts
+ pc
+ oplen
,
4028 EXP_ELEM_TO_BYTES (exp
->nelts
- pc
- oplen
));
4030 newexp
->elts
[pc
].opcode
= newexp
->elts
[pc
+ 2].opcode
= OP_FUNCALL
;
4031 newexp
->elts
[pc
+ 1].longconst
= (LONGEST
) nargs
;
4033 newexp
->elts
[pc
+ 3].opcode
= newexp
->elts
[pc
+ 6].opcode
= OP_VAR_VALUE
;
4034 newexp
->elts
[pc
+ 4].block
= block
;
4035 newexp
->elts
[pc
+ 5].symbol
= sym
;
4037 expp
->reset (newexp
);
4040 /* Type-class predicates */
4042 /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type),
4046 numeric_type_p (struct type
*type
)
4052 switch (type
->code ())
4057 case TYPE_CODE_RANGE
:
4058 return (type
== TYPE_TARGET_TYPE (type
)
4059 || numeric_type_p (TYPE_TARGET_TYPE (type
)));
4066 /* True iff TYPE is integral (an INT or RANGE of INTs). */
4069 integer_type_p (struct type
*type
)
4075 switch (type
->code ())
4079 case TYPE_CODE_RANGE
:
4080 return (type
== TYPE_TARGET_TYPE (type
)
4081 || integer_type_p (TYPE_TARGET_TYPE (type
)));
4088 /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */
4091 scalar_type_p (struct type
*type
)
4097 switch (type
->code ())
4100 case TYPE_CODE_RANGE
:
4101 case TYPE_CODE_ENUM
:
4110 /* True iff TYPE is discrete (INT, RANGE, ENUM). */
4113 discrete_type_p (struct type
*type
)
4119 switch (type
->code ())
4122 case TYPE_CODE_RANGE
:
4123 case TYPE_CODE_ENUM
:
4124 case TYPE_CODE_BOOL
:
4132 /* Returns non-zero if OP with operands in the vector ARGS could be
4133 a user-defined function. Errs on the side of pre-defined operators
4134 (i.e., result 0). */
4137 possible_user_operator_p (enum exp_opcode op
, struct value
*args
[])
4139 struct type
*type0
=
4140 (args
[0] == NULL
) ? NULL
: ada_check_typedef (value_type (args
[0]));
4141 struct type
*type1
=
4142 (args
[1] == NULL
) ? NULL
: ada_check_typedef (value_type (args
[1]));
4156 return (!(numeric_type_p (type0
) && numeric_type_p (type1
)));
4160 case BINOP_BITWISE_AND
:
4161 case BINOP_BITWISE_IOR
:
4162 case BINOP_BITWISE_XOR
:
4163 return (!(integer_type_p (type0
) && integer_type_p (type1
)));
4166 case BINOP_NOTEQUAL
:
4171 return (!(scalar_type_p (type0
) && scalar_type_p (type1
)));
4174 return !ada_is_array_type (type0
) || !ada_is_array_type (type1
);
4177 return (!(numeric_type_p (type0
) && integer_type_p (type1
)));
4181 case UNOP_LOGICAL_NOT
:
4183 return (!numeric_type_p (type0
));
4192 1. In the following, we assume that a renaming type's name may
4193 have an ___XD suffix. It would be nice if this went away at some
4195 2. We handle both the (old) purely type-based representation of
4196 renamings and the (new) variable-based encoding. At some point,
4197 it is devoutly to be hoped that the former goes away
4198 (FIXME: hilfinger-2007-07-09).
4199 3. Subprogram renamings are not implemented, although the XRS
4200 suffix is recognized (FIXME: hilfinger-2007-07-09). */
4202 /* If SYM encodes a renaming,
4204 <renaming> renames <renamed entity>,
4206 sets *LEN to the length of the renamed entity's name,
4207 *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to
4208 the string describing the subcomponent selected from the renamed
4209 entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming
4210 (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR
4211 are undefined). Otherwise, returns a value indicating the category
4212 of entity renamed: an object (ADA_OBJECT_RENAMING), exception
4213 (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or
4214 subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the
4215 strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be
4216 deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR
4217 may be NULL, in which case they are not assigned.
4219 [Currently, however, GCC does not generate subprogram renamings.] */
4221 enum ada_renaming_category
4222 ada_parse_renaming (struct symbol
*sym
,
4223 const char **renamed_entity
, int *len
,
4224 const char **renaming_expr
)
4226 enum ada_renaming_category kind
;
4231 return ADA_NOT_RENAMING
;
4232 switch (SYMBOL_CLASS (sym
))
4235 return ADA_NOT_RENAMING
;
4239 case LOC_OPTIMIZED_OUT
:
4240 info
= strstr (sym
->linkage_name (), "___XR");
4242 return ADA_NOT_RENAMING
;
4246 kind
= ADA_OBJECT_RENAMING
;
4250 kind
= ADA_EXCEPTION_RENAMING
;
4254 kind
= ADA_PACKAGE_RENAMING
;
4258 kind
= ADA_SUBPROGRAM_RENAMING
;
4262 return ADA_NOT_RENAMING
;
4266 if (renamed_entity
!= NULL
)
4267 *renamed_entity
= info
;
4268 suffix
= strstr (info
, "___XE");
4269 if (suffix
== NULL
|| suffix
== info
)
4270 return ADA_NOT_RENAMING
;
4272 *len
= strlen (info
) - strlen (suffix
);
4274 if (renaming_expr
!= NULL
)
4275 *renaming_expr
= suffix
;
4279 /* Compute the value of the given RENAMING_SYM, which is expected to
4280 be a symbol encoding a renaming expression. BLOCK is the block
4281 used to evaluate the renaming. */
4283 static struct value
*
4284 ada_read_renaming_var_value (struct symbol
*renaming_sym
,
4285 const struct block
*block
)
4287 const char *sym_name
;
4289 sym_name
= renaming_sym
->linkage_name ();
4290 expression_up expr
= parse_exp_1 (&sym_name
, 0, block
, 0);
4291 return evaluate_expression (expr
.get ());
4295 /* Evaluation: Function Calls */
4297 /* Return an lvalue containing the value VAL. This is the identity on
4298 lvalues, and otherwise has the side-effect of allocating memory
4299 in the inferior where a copy of the value contents is copied. */
4301 static struct value
*
4302 ensure_lval (struct value
*val
)
4304 if (VALUE_LVAL (val
) == not_lval
4305 || VALUE_LVAL (val
) == lval_internalvar
)
4307 int len
= TYPE_LENGTH (ada_check_typedef (value_type (val
)));
4308 const CORE_ADDR addr
=
4309 value_as_long (value_allocate_space_in_inferior (len
));
4311 VALUE_LVAL (val
) = lval_memory
;
4312 set_value_address (val
, addr
);
4313 write_memory (addr
, value_contents (val
), len
);
4319 /* Given ARG, a value of type (pointer or reference to a)*
4320 structure/union, extract the component named NAME from the ultimate
4321 target structure/union and return it as a value with its
4324 The routine searches for NAME among all members of the structure itself
4325 and (recursively) among all members of any wrapper members
4328 If NO_ERR, then simply return NULL in case of error, rather than
4331 static struct value
*
4332 ada_value_struct_elt (struct value
*arg
, const char *name
, int no_err
)
4334 struct type
*t
, *t1
;
4339 t1
= t
= ada_check_typedef (value_type (arg
));
4340 if (t
->code () == TYPE_CODE_REF
)
4342 t1
= TYPE_TARGET_TYPE (t
);
4345 t1
= ada_check_typedef (t1
);
4346 if (t1
->code () == TYPE_CODE_PTR
)
4348 arg
= coerce_ref (arg
);
4353 while (t
->code () == TYPE_CODE_PTR
)
4355 t1
= TYPE_TARGET_TYPE (t
);
4358 t1
= ada_check_typedef (t1
);
4359 if (t1
->code () == TYPE_CODE_PTR
)
4361 arg
= value_ind (arg
);
4368 if (t1
->code () != TYPE_CODE_STRUCT
&& t1
->code () != TYPE_CODE_UNION
)
4372 v
= ada_search_struct_field (name
, arg
, 0, t
);
4375 int bit_offset
, bit_size
, byte_offset
;
4376 struct type
*field_type
;
4379 if (t
->code () == TYPE_CODE_PTR
)
4380 address
= value_address (ada_value_ind (arg
));
4382 address
= value_address (ada_coerce_ref (arg
));
4384 /* Check to see if this is a tagged type. We also need to handle
4385 the case where the type is a reference to a tagged type, but
4386 we have to be careful to exclude pointers to tagged types.
4387 The latter should be shown as usual (as a pointer), whereas
4388 a reference should mostly be transparent to the user. */
4390 if (ada_is_tagged_type (t1
, 0)
4391 || (t1
->code () == TYPE_CODE_REF
4392 && ada_is_tagged_type (TYPE_TARGET_TYPE (t1
), 0)))
4394 /* We first try to find the searched field in the current type.
4395 If not found then let's look in the fixed type. */
4397 if (!find_struct_field (name
, t1
, 0,
4398 &field_type
, &byte_offset
, &bit_offset
,
4407 /* Convert to fixed type in all cases, so that we have proper
4408 offsets to each field in unconstrained record types. */
4409 t1
= ada_to_fixed_type (ada_get_base_type (t1
), NULL
,
4410 address
, NULL
, check_tag
);
4412 if (find_struct_field (name
, t1
, 0,
4413 &field_type
, &byte_offset
, &bit_offset
,
4418 if (t
->code () == TYPE_CODE_REF
)
4419 arg
= ada_coerce_ref (arg
);
4421 arg
= ada_value_ind (arg
);
4422 v
= ada_value_primitive_packed_val (arg
, NULL
, byte_offset
,
4423 bit_offset
, bit_size
,
4427 v
= value_at_lazy (field_type
, address
+ byte_offset
);
4431 if (v
!= NULL
|| no_err
)
4434 error (_("There is no member named %s."), name
);
4440 error (_("Attempt to extract a component of "
4441 "a value that is not a record."));
4444 /* Return the value ACTUAL, converted to be an appropriate value for a
4445 formal of type FORMAL_TYPE. Use *SP as a stack pointer for
4446 allocating any necessary descriptors (fat pointers), or copies of
4447 values not residing in memory, updating it as needed. */
4450 ada_convert_actual (struct value
*actual
, struct type
*formal_type0
)
4452 struct type
*actual_type
= ada_check_typedef (value_type (actual
));
4453 struct type
*formal_type
= ada_check_typedef (formal_type0
);
4454 struct type
*formal_target
=
4455 formal_type
->code () == TYPE_CODE_PTR
4456 ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type
)) : formal_type
;
4457 struct type
*actual_target
=
4458 actual_type
->code () == TYPE_CODE_PTR
4459 ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type
)) : actual_type
;
4461 if (ada_is_array_descriptor_type (formal_target
)
4462 && actual_target
->code () == TYPE_CODE_ARRAY
)
4463 return make_array_descriptor (formal_type
, actual
);
4464 else if (formal_type
->code () == TYPE_CODE_PTR
4465 || formal_type
->code () == TYPE_CODE_REF
)
4467 struct value
*result
;
4469 if (formal_target
->code () == TYPE_CODE_ARRAY
4470 && ada_is_array_descriptor_type (actual_target
))
4471 result
= desc_data (actual
);
4472 else if (formal_type
->code () != TYPE_CODE_PTR
)
4474 if (VALUE_LVAL (actual
) != lval_memory
)
4478 actual_type
= ada_check_typedef (value_type (actual
));
4479 val
= allocate_value (actual_type
);
4480 memcpy ((char *) value_contents_raw (val
),
4481 (char *) value_contents (actual
),
4482 TYPE_LENGTH (actual_type
));
4483 actual
= ensure_lval (val
);
4485 result
= value_addr (actual
);
4489 return value_cast_pointers (formal_type
, result
, 0);
4491 else if (actual_type
->code () == TYPE_CODE_PTR
)
4492 return ada_value_ind (actual
);
4493 else if (ada_is_aligner_type (formal_type
))
4495 /* We need to turn this parameter into an aligner type
4497 struct value
*aligner
= allocate_value (formal_type
);
4498 struct value
*component
= ada_value_struct_elt (aligner
, "F", 0);
4500 value_assign_to_component (aligner
, component
, actual
);
4507 /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of
4508 type TYPE. This is usually an inefficient no-op except on some targets
4509 (such as AVR) where the representation of a pointer and an address
4513 value_pointer (struct value
*value
, struct type
*type
)
4515 struct gdbarch
*gdbarch
= get_type_arch (type
);
4516 unsigned len
= TYPE_LENGTH (type
);
4517 gdb_byte
*buf
= (gdb_byte
*) alloca (len
);
4520 addr
= value_address (value
);
4521 gdbarch_address_to_pointer (gdbarch
, type
, buf
, addr
);
4522 addr
= extract_unsigned_integer (buf
, len
, type_byte_order (type
));
4527 /* Push a descriptor of type TYPE for array value ARR on the stack at
4528 *SP, updating *SP to reflect the new descriptor. Return either
4529 an lvalue representing the new descriptor, or (if TYPE is a pointer-
4530 to-descriptor type rather than a descriptor type), a struct value *
4531 representing a pointer to this descriptor. */
4533 static struct value
*
4534 make_array_descriptor (struct type
*type
, struct value
*arr
)
4536 struct type
*bounds_type
= desc_bounds_type (type
);
4537 struct type
*desc_type
= desc_base_type (type
);
4538 struct value
*descriptor
= allocate_value (desc_type
);
4539 struct value
*bounds
= allocate_value (bounds_type
);
4542 for (i
= ada_array_arity (ada_check_typedef (value_type (arr
)));
4545 modify_field (value_type (bounds
), value_contents_writeable (bounds
),
4546 ada_array_bound (arr
, i
, 0),
4547 desc_bound_bitpos (bounds_type
, i
, 0),
4548 desc_bound_bitsize (bounds_type
, i
, 0));
4549 modify_field (value_type (bounds
), value_contents_writeable (bounds
),
4550 ada_array_bound (arr
, i
, 1),
4551 desc_bound_bitpos (bounds_type
, i
, 1),
4552 desc_bound_bitsize (bounds_type
, i
, 1));
4555 bounds
= ensure_lval (bounds
);
4557 modify_field (value_type (descriptor
),
4558 value_contents_writeable (descriptor
),
4559 value_pointer (ensure_lval (arr
),
4560 TYPE_FIELD_TYPE (desc_type
, 0)),
4561 fat_pntr_data_bitpos (desc_type
),
4562 fat_pntr_data_bitsize (desc_type
));
4564 modify_field (value_type (descriptor
),
4565 value_contents_writeable (descriptor
),
4566 value_pointer (bounds
,
4567 TYPE_FIELD_TYPE (desc_type
, 1)),
4568 fat_pntr_bounds_bitpos (desc_type
),
4569 fat_pntr_bounds_bitsize (desc_type
));
4571 descriptor
= ensure_lval (descriptor
);
4573 if (type
->code () == TYPE_CODE_PTR
)
4574 return value_addr (descriptor
);
4579 /* Symbol Cache Module */
4581 /* Performance measurements made as of 2010-01-15 indicate that
4582 this cache does bring some noticeable improvements. Depending
4583 on the type of entity being printed, the cache can make it as much
4584 as an order of magnitude faster than without it.
4586 The descriptive type DWARF extension has significantly reduced
4587 the need for this cache, at least when DWARF is being used. However,
4588 even in this case, some expensive name-based symbol searches are still
4589 sometimes necessary - to find an XVZ variable, mostly. */
4591 /* Initialize the contents of SYM_CACHE. */
4594 ada_init_symbol_cache (struct ada_symbol_cache
*sym_cache
)
4596 obstack_init (&sym_cache
->cache_space
);
4597 memset (sym_cache
->root
, '\000', sizeof (sym_cache
->root
));
4600 /* Free the memory used by SYM_CACHE. */
4603 ada_free_symbol_cache (struct ada_symbol_cache
*sym_cache
)
4605 obstack_free (&sym_cache
->cache_space
, NULL
);
4609 /* Return the symbol cache associated to the given program space PSPACE.
4610 If not allocated for this PSPACE yet, allocate and initialize one. */
4612 static struct ada_symbol_cache
*
4613 ada_get_symbol_cache (struct program_space
*pspace
)
4615 struct ada_pspace_data
*pspace_data
= get_ada_pspace_data (pspace
);
4617 if (pspace_data
->sym_cache
== NULL
)
4619 pspace_data
->sym_cache
= XCNEW (struct ada_symbol_cache
);
4620 ada_init_symbol_cache (pspace_data
->sym_cache
);
4623 return pspace_data
->sym_cache
;
4626 /* Clear all entries from the symbol cache. */
4629 ada_clear_symbol_cache (void)
4631 struct ada_symbol_cache
*sym_cache
4632 = ada_get_symbol_cache (current_program_space
);
4634 obstack_free (&sym_cache
->cache_space
, NULL
);
4635 ada_init_symbol_cache (sym_cache
);
4638 /* Search our cache for an entry matching NAME and DOMAIN.
4639 Return it if found, or NULL otherwise. */
4641 static struct cache_entry
**
4642 find_entry (const char *name
, domain_enum domain
)
4644 struct ada_symbol_cache
*sym_cache
4645 = ada_get_symbol_cache (current_program_space
);
4646 int h
= msymbol_hash (name
) % HASH_SIZE
;
4647 struct cache_entry
**e
;
4649 for (e
= &sym_cache
->root
[h
]; *e
!= NULL
; e
= &(*e
)->next
)
4651 if (domain
== (*e
)->domain
&& strcmp (name
, (*e
)->name
) == 0)
4657 /* Search the symbol cache for an entry matching NAME and DOMAIN.
4658 Return 1 if found, 0 otherwise.
4660 If an entry was found and SYM is not NULL, set *SYM to the entry's
4661 SYM. Same principle for BLOCK if not NULL. */
4664 lookup_cached_symbol (const char *name
, domain_enum domain
,
4665 struct symbol
**sym
, const struct block
**block
)
4667 struct cache_entry
**e
= find_entry (name
, domain
);
4674 *block
= (*e
)->block
;
4678 /* Assuming that (SYM, BLOCK) is the result of the lookup of NAME
4679 in domain DOMAIN, save this result in our symbol cache. */
4682 cache_symbol (const char *name
, domain_enum domain
, struct symbol
*sym
,
4683 const struct block
*block
)
4685 struct ada_symbol_cache
*sym_cache
4686 = ada_get_symbol_cache (current_program_space
);
4688 struct cache_entry
*e
;
4690 /* Symbols for builtin types don't have a block.
4691 For now don't cache such symbols. */
4692 if (sym
!= NULL
&& !SYMBOL_OBJFILE_OWNED (sym
))
4695 /* If the symbol is a local symbol, then do not cache it, as a search
4696 for that symbol depends on the context. To determine whether
4697 the symbol is local or not, we check the block where we found it
4698 against the global and static blocks of its associated symtab. */
4700 && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym
)),
4701 GLOBAL_BLOCK
) != block
4702 && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym
)),
4703 STATIC_BLOCK
) != block
)
4706 h
= msymbol_hash (name
) % HASH_SIZE
;
4707 e
= XOBNEW (&sym_cache
->cache_space
, cache_entry
);
4708 e
->next
= sym_cache
->root
[h
];
4709 sym_cache
->root
[h
] = e
;
4710 e
->name
= obstack_strdup (&sym_cache
->cache_space
, name
);
4718 /* Return the symbol name match type that should be used used when
4719 searching for all symbols matching LOOKUP_NAME.
4721 LOOKUP_NAME is expected to be a symbol name after transformation
4724 static symbol_name_match_type
4725 name_match_type_from_name (const char *lookup_name
)
4727 return (strstr (lookup_name
, "__") == NULL
4728 ? symbol_name_match_type::WILD
4729 : symbol_name_match_type::FULL
);
4732 /* Return the result of a standard (literal, C-like) lookup of NAME in
4733 given DOMAIN, visible from lexical block BLOCK. */
4735 static struct symbol
*
4736 standard_lookup (const char *name
, const struct block
*block
,
4739 /* Initialize it just to avoid a GCC false warning. */
4740 struct block_symbol sym
= {};
4742 if (lookup_cached_symbol (name
, domain
, &sym
.symbol
, NULL
))
4744 ada_lookup_encoded_symbol (name
, block
, domain
, &sym
);
4745 cache_symbol (name
, domain
, sym
.symbol
, sym
.block
);
4750 /* Non-zero iff there is at least one non-function/non-enumeral symbol
4751 in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions,
4752 since they contend in overloading in the same way. */
4754 is_nonfunction (struct block_symbol syms
[], int n
)
4758 for (i
= 0; i
< n
; i
+= 1)
4759 if (SYMBOL_TYPE (syms
[i
].symbol
)->code () != TYPE_CODE_FUNC
4760 && (SYMBOL_TYPE (syms
[i
].symbol
)->code () != TYPE_CODE_ENUM
4761 || SYMBOL_CLASS (syms
[i
].symbol
) != LOC_CONST
))
4767 /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent
4768 struct types. Otherwise, they may not. */
4771 equiv_types (struct type
*type0
, struct type
*type1
)
4775 if (type0
== NULL
|| type1
== NULL
4776 || type0
->code () != type1
->code ())
4778 if ((type0
->code () == TYPE_CODE_STRUCT
4779 || type0
->code () == TYPE_CODE_ENUM
)
4780 && ada_type_name (type0
) != NULL
&& ada_type_name (type1
) != NULL
4781 && strcmp (ada_type_name (type0
), ada_type_name (type1
)) == 0)
4787 /* True iff SYM0 represents the same entity as SYM1, or one that is
4788 no more defined than that of SYM1. */
4791 lesseq_defined_than (struct symbol
*sym0
, struct symbol
*sym1
)
4795 if (SYMBOL_DOMAIN (sym0
) != SYMBOL_DOMAIN (sym1
)
4796 || SYMBOL_CLASS (sym0
) != SYMBOL_CLASS (sym1
))
4799 switch (SYMBOL_CLASS (sym0
))
4805 struct type
*type0
= SYMBOL_TYPE (sym0
);
4806 struct type
*type1
= SYMBOL_TYPE (sym1
);
4807 const char *name0
= sym0
->linkage_name ();
4808 const char *name1
= sym1
->linkage_name ();
4809 int len0
= strlen (name0
);
4812 type0
->code () == type1
->code ()
4813 && (equiv_types (type0
, type1
)
4814 || (len0
< strlen (name1
) && strncmp (name0
, name1
, len0
) == 0
4815 && startswith (name1
+ len0
, "___XV")));
4818 return SYMBOL_VALUE (sym0
) == SYMBOL_VALUE (sym1
)
4819 && equiv_types (SYMBOL_TYPE (sym0
), SYMBOL_TYPE (sym1
));
4823 const char *name0
= sym0
->linkage_name ();
4824 const char *name1
= sym1
->linkage_name ();
4825 return (strcmp (name0
, name1
) == 0
4826 && SYMBOL_VALUE_ADDRESS (sym0
) == SYMBOL_VALUE_ADDRESS (sym1
));
4834 /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct block_symbol
4835 records in OBSTACKP. Do nothing if SYM is a duplicate. */
4838 add_defn_to_vec (struct obstack
*obstackp
,
4840 const struct block
*block
)
4843 struct block_symbol
*prevDefns
= defns_collected (obstackp
, 0);
4845 /* Do not try to complete stub types, as the debugger is probably
4846 already scanning all symbols matching a certain name at the
4847 time when this function is called. Trying to replace the stub
4848 type by its associated full type will cause us to restart a scan
4849 which may lead to an infinite recursion. Instead, the client
4850 collecting the matching symbols will end up collecting several
4851 matches, with at least one of them complete. It can then filter
4852 out the stub ones if needed. */
4854 for (i
= num_defns_collected (obstackp
) - 1; i
>= 0; i
-= 1)
4856 if (lesseq_defined_than (sym
, prevDefns
[i
].symbol
))
4858 else if (lesseq_defined_than (prevDefns
[i
].symbol
, sym
))
4860 prevDefns
[i
].symbol
= sym
;
4861 prevDefns
[i
].block
= block
;
4867 struct block_symbol info
;
4871 obstack_grow (obstackp
, &info
, sizeof (struct block_symbol
));
4875 /* Number of block_symbol structures currently collected in current vector in
4879 num_defns_collected (struct obstack
*obstackp
)
4881 return obstack_object_size (obstackp
) / sizeof (struct block_symbol
);
4884 /* Vector of block_symbol structures currently collected in current vector in
4885 OBSTACKP. If FINISH, close off the vector and return its final address. */
4887 static struct block_symbol
*
4888 defns_collected (struct obstack
*obstackp
, int finish
)
4891 return (struct block_symbol
*) obstack_finish (obstackp
);
4893 return (struct block_symbol
*) obstack_base (obstackp
);
4896 /* Return a bound minimal symbol matching NAME according to Ada
4897 decoding rules. Returns an invalid symbol if there is no such
4898 minimal symbol. Names prefixed with "standard__" are handled
4899 specially: "standard__" is first stripped off, and only static and
4900 global symbols are searched. */
4902 struct bound_minimal_symbol
4903 ada_lookup_simple_minsym (const char *name
)
4905 struct bound_minimal_symbol result
;
4907 memset (&result
, 0, sizeof (result
));
4909 symbol_name_match_type match_type
= name_match_type_from_name (name
);
4910 lookup_name_info
lookup_name (name
, match_type
);
4912 symbol_name_matcher_ftype
*match_name
4913 = ada_get_symbol_name_matcher (lookup_name
);
4915 for (objfile
*objfile
: current_program_space
->objfiles ())
4917 for (minimal_symbol
*msymbol
: objfile
->msymbols ())
4919 if (match_name (msymbol
->linkage_name (), lookup_name
, NULL
)
4920 && MSYMBOL_TYPE (msymbol
) != mst_solib_trampoline
)
4922 result
.minsym
= msymbol
;
4923 result
.objfile
= objfile
;
4932 /* For all subprograms that statically enclose the subprogram of the
4933 selected frame, add symbols matching identifier NAME in DOMAIN
4934 and their blocks to the list of data in OBSTACKP, as for
4935 ada_add_block_symbols (q.v.). If WILD_MATCH_P, treat as NAME
4936 with a wildcard prefix. */
4939 add_symbols_from_enclosing_procs (struct obstack
*obstackp
,
4940 const lookup_name_info
&lookup_name
,
4945 /* True if TYPE is definitely an artificial type supplied to a symbol
4946 for which no debugging information was given in the symbol file. */
4949 is_nondebugging_type (struct type
*type
)
4951 const char *name
= ada_type_name (type
);
4953 return (name
!= NULL
&& strcmp (name
, "<variable, no debug info>") == 0);
4956 /* Return nonzero if TYPE1 and TYPE2 are two enumeration types
4957 that are deemed "identical" for practical purposes.
4959 This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM
4960 types and that their number of enumerals is identical (in other
4961 words, TYPE_NFIELDS (type1) == TYPE_NFIELDS (type2)). */
4964 ada_identical_enum_types_p (struct type
*type1
, struct type
*type2
)
4968 /* The heuristic we use here is fairly conservative. We consider
4969 that 2 enumerate types are identical if they have the same
4970 number of enumerals and that all enumerals have the same
4971 underlying value and name. */
4973 /* All enums in the type should have an identical underlying value. */
4974 for (i
= 0; i
< TYPE_NFIELDS (type1
); i
++)
4975 if (TYPE_FIELD_ENUMVAL (type1
, i
) != TYPE_FIELD_ENUMVAL (type2
, i
))
4978 /* All enumerals should also have the same name (modulo any numerical
4980 for (i
= 0; i
< TYPE_NFIELDS (type1
); i
++)
4982 const char *name_1
= TYPE_FIELD_NAME (type1
, i
);
4983 const char *name_2
= TYPE_FIELD_NAME (type2
, i
);
4984 int len_1
= strlen (name_1
);
4985 int len_2
= strlen (name_2
);
4987 ada_remove_trailing_digits (TYPE_FIELD_NAME (type1
, i
), &len_1
);
4988 ada_remove_trailing_digits (TYPE_FIELD_NAME (type2
, i
), &len_2
);
4990 || strncmp (TYPE_FIELD_NAME (type1
, i
),
4991 TYPE_FIELD_NAME (type2
, i
),
4999 /* Return nonzero if all the symbols in SYMS are all enumeral symbols
5000 that are deemed "identical" for practical purposes. Sometimes,
5001 enumerals are not strictly identical, but their types are so similar
5002 that they can be considered identical.
5004 For instance, consider the following code:
5006 type Color is (Black, Red, Green, Blue, White);
5007 type RGB_Color is new Color range Red .. Blue;
5009 Type RGB_Color is a subrange of an implicit type which is a copy
5010 of type Color. If we call that implicit type RGB_ColorB ("B" is
5011 for "Base Type"), then type RGB_ColorB is a copy of type Color.
5012 As a result, when an expression references any of the enumeral
5013 by name (Eg. "print green"), the expression is technically
5014 ambiguous and the user should be asked to disambiguate. But
5015 doing so would only hinder the user, since it wouldn't matter
5016 what choice he makes, the outcome would always be the same.
5017 So, for practical purposes, we consider them as the same. */
5020 symbols_are_identical_enums (const std::vector
<struct block_symbol
> &syms
)
5024 /* Before performing a thorough comparison check of each type,
5025 we perform a series of inexpensive checks. We expect that these
5026 checks will quickly fail in the vast majority of cases, and thus
5027 help prevent the unnecessary use of a more expensive comparison.
5028 Said comparison also expects us to make some of these checks
5029 (see ada_identical_enum_types_p). */
5031 /* Quick check: All symbols should have an enum type. */
5032 for (i
= 0; i
< syms
.size (); i
++)
5033 if (SYMBOL_TYPE (syms
[i
].symbol
)->code () != TYPE_CODE_ENUM
)
5036 /* Quick check: They should all have the same value. */
5037 for (i
= 1; i
< syms
.size (); i
++)
5038 if (SYMBOL_VALUE (syms
[i
].symbol
) != SYMBOL_VALUE (syms
[0].symbol
))
5041 /* Quick check: They should all have the same number of enumerals. */
5042 for (i
= 1; i
< syms
.size (); i
++)
5043 if (TYPE_NFIELDS (SYMBOL_TYPE (syms
[i
].symbol
))
5044 != TYPE_NFIELDS (SYMBOL_TYPE (syms
[0].symbol
)))
5047 /* All the sanity checks passed, so we might have a set of
5048 identical enumeration types. Perform a more complete
5049 comparison of the type of each symbol. */
5050 for (i
= 1; i
< syms
.size (); i
++)
5051 if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms
[i
].symbol
),
5052 SYMBOL_TYPE (syms
[0].symbol
)))
5058 /* Remove any non-debugging symbols in SYMS that definitely
5059 duplicate other symbols in the list (The only case I know of where
5060 this happens is when object files containing stabs-in-ecoff are
5061 linked with files containing ordinary ecoff debugging symbols (or no
5062 debugging symbols)). Modifies SYMS to squeeze out deleted entries.
5063 Returns the number of items in the modified list. */
5066 remove_extra_symbols (std::vector
<struct block_symbol
> *syms
)
5070 /* We should never be called with less than 2 symbols, as there
5071 cannot be any extra symbol in that case. But it's easy to
5072 handle, since we have nothing to do in that case. */
5073 if (syms
->size () < 2)
5074 return syms
->size ();
5077 while (i
< syms
->size ())
5081 /* If two symbols have the same name and one of them is a stub type,
5082 the get rid of the stub. */
5084 if (TYPE_STUB (SYMBOL_TYPE ((*syms
)[i
].symbol
))
5085 && (*syms
)[i
].symbol
->linkage_name () != NULL
)
5087 for (j
= 0; j
< syms
->size (); j
++)
5090 && !TYPE_STUB (SYMBOL_TYPE ((*syms
)[j
].symbol
))
5091 && (*syms
)[j
].symbol
->linkage_name () != NULL
5092 && strcmp ((*syms
)[i
].symbol
->linkage_name (),
5093 (*syms
)[j
].symbol
->linkage_name ()) == 0)
5098 /* Two symbols with the same name, same class and same address
5099 should be identical. */
5101 else if ((*syms
)[i
].symbol
->linkage_name () != NULL
5102 && SYMBOL_CLASS ((*syms
)[i
].symbol
) == LOC_STATIC
5103 && is_nondebugging_type (SYMBOL_TYPE ((*syms
)[i
].symbol
)))
5105 for (j
= 0; j
< syms
->size (); j
+= 1)
5108 && (*syms
)[j
].symbol
->linkage_name () != NULL
5109 && strcmp ((*syms
)[i
].symbol
->linkage_name (),
5110 (*syms
)[j
].symbol
->linkage_name ()) == 0
5111 && SYMBOL_CLASS ((*syms
)[i
].symbol
)
5112 == SYMBOL_CLASS ((*syms
)[j
].symbol
)
5113 && SYMBOL_VALUE_ADDRESS ((*syms
)[i
].symbol
)
5114 == SYMBOL_VALUE_ADDRESS ((*syms
)[j
].symbol
))
5120 syms
->erase (syms
->begin () + i
);
5125 /* If all the remaining symbols are identical enumerals, then
5126 just keep the first one and discard the rest.
5128 Unlike what we did previously, we do not discard any entry
5129 unless they are ALL identical. This is because the symbol
5130 comparison is not a strict comparison, but rather a practical
5131 comparison. If all symbols are considered identical, then
5132 we can just go ahead and use the first one and discard the rest.
5133 But if we cannot reduce the list to a single element, we have
5134 to ask the user to disambiguate anyways. And if we have to
5135 present a multiple-choice menu, it's less confusing if the list
5136 isn't missing some choices that were identical and yet distinct. */
5137 if (symbols_are_identical_enums (*syms
))
5140 return syms
->size ();
5143 /* Given a type that corresponds to a renaming entity, use the type name
5144 to extract the scope (package name or function name, fully qualified,
5145 and following the GNAT encoding convention) where this renaming has been
5149 xget_renaming_scope (struct type
*renaming_type
)
5151 /* The renaming types adhere to the following convention:
5152 <scope>__<rename>___<XR extension>.
5153 So, to extract the scope, we search for the "___XR" extension,
5154 and then backtrack until we find the first "__". */
5156 const char *name
= renaming_type
->name ();
5157 const char *suffix
= strstr (name
, "___XR");
5160 /* Now, backtrack a bit until we find the first "__". Start looking
5161 at suffix - 3, as the <rename> part is at least one character long. */
5163 for (last
= suffix
- 3; last
> name
; last
--)
5164 if (last
[0] == '_' && last
[1] == '_')
5167 /* Make a copy of scope and return it. */
5168 return std::string (name
, last
);
5171 /* Return nonzero if NAME corresponds to a package name. */
5174 is_package_name (const char *name
)
5176 /* Here, We take advantage of the fact that no symbols are generated
5177 for packages, while symbols are generated for each function.
5178 So the condition for NAME represent a package becomes equivalent
5179 to NAME not existing in our list of symbols. There is only one
5180 small complication with library-level functions (see below). */
5182 /* If it is a function that has not been defined at library level,
5183 then we should be able to look it up in the symbols. */
5184 if (standard_lookup (name
, NULL
, VAR_DOMAIN
) != NULL
)
5187 /* Library-level function names start with "_ada_". See if function
5188 "_ada_" followed by NAME can be found. */
5190 /* Do a quick check that NAME does not contain "__", since library-level
5191 functions names cannot contain "__" in them. */
5192 if (strstr (name
, "__") != NULL
)
5195 std::string fun_name
= string_printf ("_ada_%s", name
);
5197 return (standard_lookup (fun_name
.c_str (), NULL
, VAR_DOMAIN
) == NULL
);
5200 /* Return nonzero if SYM corresponds to a renaming entity that is
5201 not visible from FUNCTION_NAME. */
5204 old_renaming_is_invisible (const struct symbol
*sym
, const char *function_name
)
5206 if (SYMBOL_CLASS (sym
) != LOC_TYPEDEF
)
5209 std::string scope
= xget_renaming_scope (SYMBOL_TYPE (sym
));
5211 /* If the rename has been defined in a package, then it is visible. */
5212 if (is_package_name (scope
.c_str ()))
5215 /* Check that the rename is in the current function scope by checking
5216 that its name starts with SCOPE. */
5218 /* If the function name starts with "_ada_", it means that it is
5219 a library-level function. Strip this prefix before doing the
5220 comparison, as the encoding for the renaming does not contain
5222 if (startswith (function_name
, "_ada_"))
5225 return !startswith (function_name
, scope
.c_str ());
5228 /* Remove entries from SYMS that corresponds to a renaming entity that
5229 is not visible from the function associated with CURRENT_BLOCK or
5230 that is superfluous due to the presence of more specific renaming
5231 information. Places surviving symbols in the initial entries of
5232 SYMS and returns the number of surviving symbols.
5235 First, in cases where an object renaming is implemented as a
5236 reference variable, GNAT may produce both the actual reference
5237 variable and the renaming encoding. In this case, we discard the
5240 Second, GNAT emits a type following a specified encoding for each renaming
5241 entity. Unfortunately, STABS currently does not support the definition
5242 of types that are local to a given lexical block, so all renamings types
5243 are emitted at library level. As a consequence, if an application
5244 contains two renaming entities using the same name, and a user tries to
5245 print the value of one of these entities, the result of the ada symbol
5246 lookup will also contain the wrong renaming type.
5248 This function partially covers for this limitation by attempting to
5249 remove from the SYMS list renaming symbols that should be visible
5250 from CURRENT_BLOCK. However, there does not seem be a 100% reliable
5251 method with the current information available. The implementation
5252 below has a couple of limitations (FIXME: brobecker-2003-05-12):
5254 - When the user tries to print a rename in a function while there
5255 is another rename entity defined in a package: Normally, the
5256 rename in the function has precedence over the rename in the
5257 package, so the latter should be removed from the list. This is
5258 currently not the case.
5260 - This function will incorrectly remove valid renames if
5261 the CURRENT_BLOCK corresponds to a function which symbol name
5262 has been changed by an "Export" pragma. As a consequence,
5263 the user will be unable to print such rename entities. */
5266 remove_irrelevant_renamings (std::vector
<struct block_symbol
> *syms
,
5267 const struct block
*current_block
)
5269 struct symbol
*current_function
;
5270 const char *current_function_name
;
5272 int is_new_style_renaming
;
5274 /* If there is both a renaming foo___XR... encoded as a variable and
5275 a simple variable foo in the same block, discard the latter.
5276 First, zero out such symbols, then compress. */
5277 is_new_style_renaming
= 0;
5278 for (i
= 0; i
< syms
->size (); i
+= 1)
5280 struct symbol
*sym
= (*syms
)[i
].symbol
;
5281 const struct block
*block
= (*syms
)[i
].block
;
5285 if (sym
== NULL
|| SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5287 name
= sym
->linkage_name ();
5288 suffix
= strstr (name
, "___XR");
5292 int name_len
= suffix
- name
;
5295 is_new_style_renaming
= 1;
5296 for (j
= 0; j
< syms
->size (); j
+= 1)
5297 if (i
!= j
&& (*syms
)[j
].symbol
!= NULL
5298 && strncmp (name
, (*syms
)[j
].symbol
->linkage_name (),
5300 && block
== (*syms
)[j
].block
)
5301 (*syms
)[j
].symbol
= NULL
;
5304 if (is_new_style_renaming
)
5308 for (j
= k
= 0; j
< syms
->size (); j
+= 1)
5309 if ((*syms
)[j
].symbol
!= NULL
)
5311 (*syms
)[k
] = (*syms
)[j
];
5317 /* Extract the function name associated to CURRENT_BLOCK.
5318 Abort if unable to do so. */
5320 if (current_block
== NULL
)
5321 return syms
->size ();
5323 current_function
= block_linkage_function (current_block
);
5324 if (current_function
== NULL
)
5325 return syms
->size ();
5327 current_function_name
= current_function
->linkage_name ();
5328 if (current_function_name
== NULL
)
5329 return syms
->size ();
5331 /* Check each of the symbols, and remove it from the list if it is
5332 a type corresponding to a renaming that is out of the scope of
5333 the current block. */
5336 while (i
< syms
->size ())
5338 if (ada_parse_renaming ((*syms
)[i
].symbol
, NULL
, NULL
, NULL
)
5339 == ADA_OBJECT_RENAMING
5340 && old_renaming_is_invisible ((*syms
)[i
].symbol
,
5341 current_function_name
))
5342 syms
->erase (syms
->begin () + i
);
5347 return syms
->size ();
5350 /* Add to OBSTACKP all symbols from BLOCK (and its super-blocks)
5351 whose name and domain match NAME and DOMAIN respectively.
5352 If no match was found, then extend the search to "enclosing"
5353 routines (in other words, if we're inside a nested function,
5354 search the symbols defined inside the enclosing functions).
5355 If WILD_MATCH_P is nonzero, perform the naming matching in
5356 "wild" mode (see function "wild_match" for more info).
5358 Note: This function assumes that OBSTACKP has 0 (zero) element in it. */
5361 ada_add_local_symbols (struct obstack
*obstackp
,
5362 const lookup_name_info
&lookup_name
,
5363 const struct block
*block
, domain_enum domain
)
5365 int block_depth
= 0;
5367 while (block
!= NULL
)
5370 ada_add_block_symbols (obstackp
, block
, lookup_name
, domain
, NULL
);
5372 /* If we found a non-function match, assume that's the one. */
5373 if (is_nonfunction (defns_collected (obstackp
, 0),
5374 num_defns_collected (obstackp
)))
5377 block
= BLOCK_SUPERBLOCK (block
);
5380 /* If no luck so far, try to find NAME as a local symbol in some lexically
5381 enclosing subprogram. */
5382 if (num_defns_collected (obstackp
) == 0 && block_depth
> 2)
5383 add_symbols_from_enclosing_procs (obstackp
, lookup_name
, domain
);
5386 /* An object of this type is used as the user_data argument when
5387 calling the map_matching_symbols method. */
5391 struct objfile
*objfile
;
5392 struct obstack
*obstackp
;
5393 struct symbol
*arg_sym
;
5397 /* A callback for add_nonlocal_symbols that adds symbol, found in BSYM,
5398 to a list of symbols. DATA is a pointer to a struct match_data *
5399 containing the obstack that collects the symbol list, the file that SYM
5400 must come from, a flag indicating whether a non-argument symbol has
5401 been found in the current block, and the last argument symbol
5402 passed in SYM within the current block (if any). When SYM is null,
5403 marking the end of a block, the argument symbol is added if no
5404 other has been found. */
5407 aux_add_nonlocal_symbols (struct block_symbol
*bsym
,
5408 struct match_data
*data
)
5410 const struct block
*block
= bsym
->block
;
5411 struct symbol
*sym
= bsym
->symbol
;
5415 if (!data
->found_sym
&& data
->arg_sym
!= NULL
)
5416 add_defn_to_vec (data
->obstackp
,
5417 fixup_symbol_section (data
->arg_sym
, data
->objfile
),
5419 data
->found_sym
= 0;
5420 data
->arg_sym
= NULL
;
5424 if (SYMBOL_CLASS (sym
) == LOC_UNRESOLVED
)
5426 else if (SYMBOL_IS_ARGUMENT (sym
))
5427 data
->arg_sym
= sym
;
5430 data
->found_sym
= 1;
5431 add_defn_to_vec (data
->obstackp
,
5432 fixup_symbol_section (sym
, data
->objfile
),
5439 /* Helper for add_nonlocal_symbols. Find symbols in DOMAIN which are
5440 targeted by renamings matching LOOKUP_NAME in BLOCK. Add these
5441 symbols to OBSTACKP. Return whether we found such symbols. */
5444 ada_add_block_renamings (struct obstack
*obstackp
,
5445 const struct block
*block
,
5446 const lookup_name_info
&lookup_name
,
5449 struct using_direct
*renaming
;
5450 int defns_mark
= num_defns_collected (obstackp
);
5452 symbol_name_matcher_ftype
*name_match
5453 = ada_get_symbol_name_matcher (lookup_name
);
5455 for (renaming
= block_using (block
);
5457 renaming
= renaming
->next
)
5461 /* Avoid infinite recursions: skip this renaming if we are actually
5462 already traversing it.
5464 Currently, symbol lookup in Ada don't use the namespace machinery from
5465 C++/Fortran support: skip namespace imports that use them. */
5466 if (renaming
->searched
5467 || (renaming
->import_src
!= NULL
5468 && renaming
->import_src
[0] != '\0')
5469 || (renaming
->import_dest
!= NULL
5470 && renaming
->import_dest
[0] != '\0'))
5472 renaming
->searched
= 1;
5474 /* TODO: here, we perform another name-based symbol lookup, which can
5475 pull its own multiple overloads. In theory, we should be able to do
5476 better in this case since, in DWARF, DW_AT_import is a DIE reference,
5477 not a simple name. But in order to do this, we would need to enhance
5478 the DWARF reader to associate a symbol to this renaming, instead of a
5479 name. So, for now, we do something simpler: re-use the C++/Fortran
5480 namespace machinery. */
5481 r_name
= (renaming
->alias
!= NULL
5483 : renaming
->declaration
);
5484 if (name_match (r_name
, lookup_name
, NULL
))
5486 lookup_name_info
decl_lookup_name (renaming
->declaration
,
5487 lookup_name
.match_type ());
5488 ada_add_all_symbols (obstackp
, block
, decl_lookup_name
, domain
,
5491 renaming
->searched
= 0;
5493 return num_defns_collected (obstackp
) != defns_mark
;
5496 /* Implements compare_names, but only applying the comparision using
5497 the given CASING. */
5500 compare_names_with_case (const char *string1
, const char *string2
,
5501 enum case_sensitivity casing
)
5503 while (*string1
!= '\0' && *string2
!= '\0')
5507 if (isspace (*string1
) || isspace (*string2
))
5508 return strcmp_iw_ordered (string1
, string2
);
5510 if (casing
== case_sensitive_off
)
5512 c1
= tolower (*string1
);
5513 c2
= tolower (*string2
);
5530 return strcmp_iw_ordered (string1
, string2
);
5532 if (*string2
== '\0')
5534 if (is_name_suffix (string1
))
5541 if (*string2
== '(')
5542 return strcmp_iw_ordered (string1
, string2
);
5545 if (casing
== case_sensitive_off
)
5546 return tolower (*string1
) - tolower (*string2
);
5548 return *string1
- *string2
;
5553 /* Compare STRING1 to STRING2, with results as for strcmp.
5554 Compatible with strcmp_iw_ordered in that...
5556 strcmp_iw_ordered (STRING1, STRING2) <= 0
5560 compare_names (STRING1, STRING2) <= 0
5562 (they may differ as to what symbols compare equal). */
5565 compare_names (const char *string1
, const char *string2
)
5569 /* Similar to what strcmp_iw_ordered does, we need to perform
5570 a case-insensitive comparison first, and only resort to
5571 a second, case-sensitive, comparison if the first one was
5572 not sufficient to differentiate the two strings. */
5574 result
= compare_names_with_case (string1
, string2
, case_sensitive_off
);
5576 result
= compare_names_with_case (string1
, string2
, case_sensitive_on
);
5581 /* Convenience function to get at the Ada encoded lookup name for
5582 LOOKUP_NAME, as a C string. */
5585 ada_lookup_name (const lookup_name_info
&lookup_name
)
5587 return lookup_name
.ada ().lookup_name ().c_str ();
5590 /* Add to OBSTACKP all non-local symbols whose name and domain match
5591 LOOKUP_NAME and DOMAIN respectively. The search is performed on
5592 GLOBAL_BLOCK symbols if GLOBAL is non-zero, or on STATIC_BLOCK
5593 symbols otherwise. */
5596 add_nonlocal_symbols (struct obstack
*obstackp
,
5597 const lookup_name_info
&lookup_name
,
5598 domain_enum domain
, int global
)
5600 struct match_data data
;
5602 memset (&data
, 0, sizeof data
);
5603 data
.obstackp
= obstackp
;
5605 bool is_wild_match
= lookup_name
.ada ().wild_match_p ();
5607 auto callback
= [&] (struct block_symbol
*bsym
)
5609 return aux_add_nonlocal_symbols (bsym
, &data
);
5612 for (objfile
*objfile
: current_program_space
->objfiles ())
5614 data
.objfile
= objfile
;
5616 objfile
->sf
->qf
->map_matching_symbols (objfile
, lookup_name
,
5617 domain
, global
, callback
,
5619 ? NULL
: compare_names
));
5621 for (compunit_symtab
*cu
: objfile
->compunits ())
5623 const struct block
*global_block
5624 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cu
), GLOBAL_BLOCK
);
5626 if (ada_add_block_renamings (obstackp
, global_block
, lookup_name
,
5632 if (num_defns_collected (obstackp
) == 0 && global
&& !is_wild_match
)
5634 const char *name
= ada_lookup_name (lookup_name
);
5635 std::string bracket_name
= std::string ("<_ada_") + name
+ '>';
5636 lookup_name_info
name1 (bracket_name
, symbol_name_match_type::FULL
);
5638 for (objfile
*objfile
: current_program_space
->objfiles ())
5640 data
.objfile
= objfile
;
5641 objfile
->sf
->qf
->map_matching_symbols (objfile
, name1
,
5642 domain
, global
, callback
,
5648 /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if
5649 FULL_SEARCH is non-zero, enclosing scope and in global scopes,
5650 returning the number of matches. Add these to OBSTACKP.
5652 When FULL_SEARCH is non-zero, any non-function/non-enumeral
5653 symbol match within the nest of blocks whose innermost member is BLOCK,
5654 is the one match returned (no other matches in that or
5655 enclosing blocks is returned). If there are any matches in or
5656 surrounding BLOCK, then these alone are returned.
5658 Names prefixed with "standard__" are handled specially:
5659 "standard__" is first stripped off (by the lookup_name
5660 constructor), and only static and global symbols are searched.
5662 If MADE_GLOBAL_LOOKUP_P is non-null, set it before return to whether we had
5663 to lookup global symbols. */
5666 ada_add_all_symbols (struct obstack
*obstackp
,
5667 const struct block
*block
,
5668 const lookup_name_info
&lookup_name
,
5671 int *made_global_lookup_p
)
5675 if (made_global_lookup_p
)
5676 *made_global_lookup_p
= 0;
5678 /* Special case: If the user specifies a symbol name inside package
5679 Standard, do a non-wild matching of the symbol name without
5680 the "standard__" prefix. This was primarily introduced in order
5681 to allow the user to specifically access the standard exceptions
5682 using, for instance, Standard.Constraint_Error when Constraint_Error
5683 is ambiguous (due to the user defining its own Constraint_Error
5684 entity inside its program). */
5685 if (lookup_name
.ada ().standard_p ())
5688 /* Check the non-global symbols. If we have ANY match, then we're done. */
5693 ada_add_local_symbols (obstackp
, lookup_name
, block
, domain
);
5696 /* In the !full_search case we're are being called by
5697 ada_iterate_over_symbols, and we don't want to search
5699 ada_add_block_symbols (obstackp
, block
, lookup_name
, domain
, NULL
);
5701 if (num_defns_collected (obstackp
) > 0 || !full_search
)
5705 /* No non-global symbols found. Check our cache to see if we have
5706 already performed this search before. If we have, then return
5709 if (lookup_cached_symbol (ada_lookup_name (lookup_name
),
5710 domain
, &sym
, &block
))
5713 add_defn_to_vec (obstackp
, sym
, block
);
5717 if (made_global_lookup_p
)
5718 *made_global_lookup_p
= 1;
5720 /* Search symbols from all global blocks. */
5722 add_nonlocal_symbols (obstackp
, lookup_name
, domain
, 1);
5724 /* Now add symbols from all per-file blocks if we've gotten no hits
5725 (not strictly correct, but perhaps better than an error). */
5727 if (num_defns_collected (obstackp
) == 0)
5728 add_nonlocal_symbols (obstackp
, lookup_name
, domain
, 0);
5731 /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if FULL_SEARCH
5732 is non-zero, enclosing scope and in global scopes, returning the number of
5734 Fills *RESULTS with (SYM,BLOCK) tuples, indicating the symbols
5735 found and the blocks and symbol tables (if any) in which they were
5738 When full_search is non-zero, any non-function/non-enumeral
5739 symbol match within the nest of blocks whose innermost member is BLOCK,
5740 is the one match returned (no other matches in that or
5741 enclosing blocks is returned). If there are any matches in or
5742 surrounding BLOCK, then these alone are returned.
5744 Names prefixed with "standard__" are handled specially: "standard__"
5745 is first stripped off, and only static and global symbols are searched. */
5748 ada_lookup_symbol_list_worker (const lookup_name_info
&lookup_name
,
5749 const struct block
*block
,
5751 std::vector
<struct block_symbol
> *results
,
5754 int syms_from_global_search
;
5756 auto_obstack obstack
;
5758 ada_add_all_symbols (&obstack
, block
, lookup_name
,
5759 domain
, full_search
, &syms_from_global_search
);
5761 ndefns
= num_defns_collected (&obstack
);
5763 struct block_symbol
*base
= defns_collected (&obstack
, 1);
5764 for (int i
= 0; i
< ndefns
; ++i
)
5765 results
->push_back (base
[i
]);
5767 ndefns
= remove_extra_symbols (results
);
5769 if (ndefns
== 0 && full_search
&& syms_from_global_search
)
5770 cache_symbol (ada_lookup_name (lookup_name
), domain
, NULL
, NULL
);
5772 if (ndefns
== 1 && full_search
&& syms_from_global_search
)
5773 cache_symbol (ada_lookup_name (lookup_name
), domain
,
5774 (*results
)[0].symbol
, (*results
)[0].block
);
5776 ndefns
= remove_irrelevant_renamings (results
, block
);
5781 /* Find symbols in DOMAIN matching NAME, in BLOCK and enclosing scope and
5782 in global scopes, returning the number of matches, and filling *RESULTS
5783 with (SYM,BLOCK) tuples.
5785 See ada_lookup_symbol_list_worker for further details. */
5788 ada_lookup_symbol_list (const char *name
, const struct block
*block
,
5790 std::vector
<struct block_symbol
> *results
)
5792 symbol_name_match_type name_match_type
= name_match_type_from_name (name
);
5793 lookup_name_info
lookup_name (name
, name_match_type
);
5795 return ada_lookup_symbol_list_worker (lookup_name
, block
, domain
, results
, 1);
5798 /* Implementation of the la_iterate_over_symbols method. */
5801 ada_iterate_over_symbols
5802 (const struct block
*block
, const lookup_name_info
&name
,
5804 gdb::function_view
<symbol_found_callback_ftype
> callback
)
5807 std::vector
<struct block_symbol
> results
;
5809 ndefs
= ada_lookup_symbol_list_worker (name
, block
, domain
, &results
, 0);
5811 for (i
= 0; i
< ndefs
; ++i
)
5813 if (!callback (&results
[i
]))
5820 /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set
5821 to 1, but choosing the first symbol found if there are multiple
5824 The result is stored in *INFO, which must be non-NULL.
5825 If no match is found, INFO->SYM is set to NULL. */
5828 ada_lookup_encoded_symbol (const char *name
, const struct block
*block
,
5830 struct block_symbol
*info
)
5832 /* Since we already have an encoded name, wrap it in '<>' to force a
5833 verbatim match. Otherwise, if the name happens to not look like
5834 an encoded name (because it doesn't include a "__"),
5835 ada_lookup_name_info would re-encode/fold it again, and that
5836 would e.g., incorrectly lowercase object renaming names like
5837 "R28b" -> "r28b". */
5838 std::string verbatim
= std::string ("<") + name
+ '>';
5840 gdb_assert (info
!= NULL
);
5841 *info
= ada_lookup_symbol (verbatim
.c_str (), block
, domain
);
5844 /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing
5845 scope and in global scopes, or NULL if none. NAME is folded and
5846 encoded first. Otherwise, the result is as for ada_lookup_symbol_list,
5847 choosing the first symbol if there are multiple choices. */
5850 ada_lookup_symbol (const char *name
, const struct block
*block0
,
5853 std::vector
<struct block_symbol
> candidates
;
5856 n_candidates
= ada_lookup_symbol_list (name
, block0
, domain
, &candidates
);
5858 if (n_candidates
== 0)
5861 block_symbol info
= candidates
[0];
5862 info
.symbol
= fixup_symbol_section (info
.symbol
, NULL
);
5866 static struct block_symbol
5867 ada_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
5869 const struct block
*block
,
5870 const domain_enum domain
)
5872 struct block_symbol sym
;
5874 sym
= ada_lookup_symbol (name
, block_static_block (block
), domain
);
5875 if (sym
.symbol
!= NULL
)
5878 /* If we haven't found a match at this point, try the primitive
5879 types. In other languages, this search is performed before
5880 searching for global symbols in order to short-circuit that
5881 global-symbol search if it happens that the name corresponds
5882 to a primitive type. But we cannot do the same in Ada, because
5883 it is perfectly legitimate for a program to declare a type which
5884 has the same name as a standard type. If looking up a type in
5885 that situation, we have traditionally ignored the primitive type
5886 in favor of user-defined types. This is why, unlike most other
5887 languages, we search the primitive types this late and only after
5888 having searched the global symbols without success. */
5890 if (domain
== VAR_DOMAIN
)
5892 struct gdbarch
*gdbarch
;
5895 gdbarch
= target_gdbarch ();
5897 gdbarch
= block_gdbarch (block
);
5898 sym
.symbol
= language_lookup_primitive_type_as_symbol (langdef
, gdbarch
, name
);
5899 if (sym
.symbol
!= NULL
)
5907 /* True iff STR is a possible encoded suffix of a normal Ada name
5908 that is to be ignored for matching purposes. Suffixes of parallel
5909 names (e.g., XVE) are not included here. Currently, the possible suffixes
5910 are given by any of the regular expressions:
5912 [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux]
5913 ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX]
5914 TKB [subprogram suffix for task bodies]
5915 _E[0-9]+[bs]$ [protected object entry suffixes]
5916 (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$
5918 Also, any leading "__[0-9]+" sequence is skipped before the suffix
5919 match is performed. This sequence is used to differentiate homonyms,
5920 is an optional part of a valid name suffix. */
5923 is_name_suffix (const char *str
)
5926 const char *matching
;
5927 const int len
= strlen (str
);
5929 /* Skip optional leading __[0-9]+. */
5931 if (len
> 3 && str
[0] == '_' && str
[1] == '_' && isdigit (str
[2]))
5934 while (isdigit (str
[0]))
5940 if (str
[0] == '.' || str
[0] == '$')
5943 while (isdigit (matching
[0]))
5945 if (matching
[0] == '\0')
5951 if (len
> 3 && str
[0] == '_' && str
[1] == '_' && str
[2] == '_')
5954 while (isdigit (matching
[0]))
5956 if (matching
[0] == '\0')
5960 /* "TKB" suffixes are used for subprograms implementing task bodies. */
5962 if (strcmp (str
, "TKB") == 0)
5966 /* FIXME: brobecker/2005-09-23: Protected Object subprograms end
5967 with a N at the end. Unfortunately, the compiler uses the same
5968 convention for other internal types it creates. So treating
5969 all entity names that end with an "N" as a name suffix causes
5970 some regressions. For instance, consider the case of an enumerated
5971 type. To support the 'Image attribute, it creates an array whose
5973 Having a single character like this as a suffix carrying some
5974 information is a bit risky. Perhaps we should change the encoding
5975 to be something like "_N" instead. In the meantime, do not do
5976 the following check. */
5977 /* Protected Object Subprograms */
5978 if (len
== 1 && str
[0] == 'N')
5983 if (len
> 3 && str
[0] == '_' && str
[1] == 'E' && isdigit (str
[2]))
5986 while (isdigit (matching
[0]))
5988 if ((matching
[0] == 'b' || matching
[0] == 's')
5989 && matching
[1] == '\0')
5993 /* ??? We should not modify STR directly, as we are doing below. This
5994 is fine in this case, but may become problematic later if we find
5995 that this alternative did not work, and want to try matching
5996 another one from the begining of STR. Since we modified it, we
5997 won't be able to find the begining of the string anymore! */
6001 while (str
[0] != '_' && str
[0] != '\0')
6003 if (str
[0] != 'n' && str
[0] != 'b')
6009 if (str
[0] == '\000')
6014 if (str
[1] != '_' || str
[2] == '\000')
6018 if (strcmp (str
+ 3, "JM") == 0)
6020 /* FIXME: brobecker/2004-09-30: GNAT will soon stop using
6021 the LJM suffix in favor of the JM one. But we will
6022 still accept LJM as a valid suffix for a reasonable
6023 amount of time, just to allow ourselves to debug programs
6024 compiled using an older version of GNAT. */
6025 if (strcmp (str
+ 3, "LJM") == 0)
6029 if (str
[4] == 'F' || str
[4] == 'D' || str
[4] == 'B'
6030 || str
[4] == 'U' || str
[4] == 'P')
6032 if (str
[4] == 'R' && str
[5] != 'T')
6036 if (!isdigit (str
[2]))
6038 for (k
= 3; str
[k
] != '\0'; k
+= 1)
6039 if (!isdigit (str
[k
]) && str
[k
] != '_')
6043 if (str
[0] == '$' && isdigit (str
[1]))
6045 for (k
= 2; str
[k
] != '\0'; k
+= 1)
6046 if (!isdigit (str
[k
]) && str
[k
] != '_')
6053 /* Return non-zero if the string starting at NAME and ending before
6054 NAME_END contains no capital letters. */
6057 is_valid_name_for_wild_match (const char *name0
)
6059 std::string decoded_name
= ada_decode (name0
);
6062 /* If the decoded name starts with an angle bracket, it means that
6063 NAME0 does not follow the GNAT encoding format. It should then
6064 not be allowed as a possible wild match. */
6065 if (decoded_name
[0] == '<')
6068 for (i
=0; decoded_name
[i
] != '\0'; i
++)
6069 if (isalpha (decoded_name
[i
]) && !islower (decoded_name
[i
]))
6075 /* Advance *NAMEP to next occurrence of TARGET0 in the string NAME0
6076 that could start a simple name. Assumes that *NAMEP points into
6077 the string beginning at NAME0. */
6080 advance_wild_match (const char **namep
, const char *name0
, int target0
)
6082 const char *name
= *namep
;
6092 if ((t1
>= 'a' && t1
<= 'z') || (t1
>= '0' && t1
<= '9'))
6095 if (name
== name0
+ 5 && startswith (name0
, "_ada"))
6100 else if (t1
== '_' && ((name
[2] >= 'a' && name
[2] <= 'z')
6101 || name
[2] == target0
))
6109 else if ((t0
>= 'a' && t0
<= 'z') || (t0
>= '0' && t0
<= '9'))
6119 /* Return true iff NAME encodes a name of the form prefix.PATN.
6120 Ignores any informational suffixes of NAME (i.e., for which
6121 is_name_suffix is true). Assumes that PATN is a lower-cased Ada
6125 wild_match (const char *name
, const char *patn
)
6128 const char *name0
= name
;
6132 const char *match
= name
;
6136 for (name
+= 1, p
= patn
+ 1; *p
!= '\0'; name
+= 1, p
+= 1)
6139 if (*p
== '\0' && is_name_suffix (name
))
6140 return match
== name0
|| is_valid_name_for_wild_match (name0
);
6142 if (name
[-1] == '_')
6145 if (!advance_wild_match (&name
, name0
, *patn
))
6150 /* Returns true iff symbol name SYM_NAME matches SEARCH_NAME, ignoring
6151 any trailing suffixes that encode debugging information or leading
6152 _ada_ on SYM_NAME (see is_name_suffix commentary for the debugging
6153 information that is ignored). */
6156 full_match (const char *sym_name
, const char *search_name
)
6158 size_t search_name_len
= strlen (search_name
);
6160 if (strncmp (sym_name
, search_name
, search_name_len
) == 0
6161 && is_name_suffix (sym_name
+ search_name_len
))
6164 if (startswith (sym_name
, "_ada_")
6165 && strncmp (sym_name
+ 5, search_name
, search_name_len
) == 0
6166 && is_name_suffix (sym_name
+ search_name_len
+ 5))
6172 /* Add symbols from BLOCK matching LOOKUP_NAME in DOMAIN to vector
6173 *defn_symbols, updating the list of symbols in OBSTACKP (if
6174 necessary). OBJFILE is the section containing BLOCK. */
6177 ada_add_block_symbols (struct obstack
*obstackp
,
6178 const struct block
*block
,
6179 const lookup_name_info
&lookup_name
,
6180 domain_enum domain
, struct objfile
*objfile
)
6182 struct block_iterator iter
;
6183 /* A matching argument symbol, if any. */
6184 struct symbol
*arg_sym
;
6185 /* Set true when we find a matching non-argument symbol. */
6191 for (sym
= block_iter_match_first (block
, lookup_name
, &iter
);
6193 sym
= block_iter_match_next (lookup_name
, &iter
))
6195 if (symbol_matches_domain (sym
->language (), SYMBOL_DOMAIN (sym
), domain
))
6197 if (SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
)
6199 if (SYMBOL_IS_ARGUMENT (sym
))
6204 add_defn_to_vec (obstackp
,
6205 fixup_symbol_section (sym
, objfile
),
6212 /* Handle renamings. */
6214 if (ada_add_block_renamings (obstackp
, block
, lookup_name
, domain
))
6217 if (!found_sym
&& arg_sym
!= NULL
)
6219 add_defn_to_vec (obstackp
,
6220 fixup_symbol_section (arg_sym
, objfile
),
6224 if (!lookup_name
.ada ().wild_match_p ())
6228 const std::string
&ada_lookup_name
= lookup_name
.ada ().lookup_name ();
6229 const char *name
= ada_lookup_name
.c_str ();
6230 size_t name_len
= ada_lookup_name
.size ();
6232 ALL_BLOCK_SYMBOLS (block
, iter
, sym
)
6234 if (symbol_matches_domain (sym
->language (),
6235 SYMBOL_DOMAIN (sym
), domain
))
6239 cmp
= (int) '_' - (int) sym
->linkage_name ()[0];
6242 cmp
= !startswith (sym
->linkage_name (), "_ada_");
6244 cmp
= strncmp (name
, sym
->linkage_name () + 5,
6249 && is_name_suffix (sym
->linkage_name () + name_len
+ 5))
6251 if (SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
)
6253 if (SYMBOL_IS_ARGUMENT (sym
))
6258 add_defn_to_vec (obstackp
,
6259 fixup_symbol_section (sym
, objfile
),
6267 /* NOTE: This really shouldn't be needed for _ada_ symbols.
6268 They aren't parameters, right? */
6269 if (!found_sym
&& arg_sym
!= NULL
)
6271 add_defn_to_vec (obstackp
,
6272 fixup_symbol_section (arg_sym
, objfile
),
6279 /* Symbol Completion */
6284 ada_lookup_name_info::matches
6285 (const char *sym_name
,
6286 symbol_name_match_type match_type
,
6287 completion_match_result
*comp_match_res
) const
6290 const char *text
= m_encoded_name
.c_str ();
6291 size_t text_len
= m_encoded_name
.size ();
6293 /* First, test against the fully qualified name of the symbol. */
6295 if (strncmp (sym_name
, text
, text_len
) == 0)
6298 std::string decoded_name
= ada_decode (sym_name
);
6299 if (match
&& !m_encoded_p
)
6301 /* One needed check before declaring a positive match is to verify
6302 that iff we are doing a verbatim match, the decoded version
6303 of the symbol name starts with '<'. Otherwise, this symbol name
6304 is not a suitable completion. */
6306 bool has_angle_bracket
= (decoded_name
[0] == '<');
6307 match
= (has_angle_bracket
== m_verbatim_p
);
6310 if (match
&& !m_verbatim_p
)
6312 /* When doing non-verbatim match, another check that needs to
6313 be done is to verify that the potentially matching symbol name
6314 does not include capital letters, because the ada-mode would
6315 not be able to understand these symbol names without the
6316 angle bracket notation. */
6319 for (tmp
= sym_name
; *tmp
!= '\0' && !isupper (*tmp
); tmp
++);
6324 /* Second: Try wild matching... */
6326 if (!match
&& m_wild_match_p
)
6328 /* Since we are doing wild matching, this means that TEXT
6329 may represent an unqualified symbol name. We therefore must
6330 also compare TEXT against the unqualified name of the symbol. */
6331 sym_name
= ada_unqualified_name (decoded_name
.c_str ());
6333 if (strncmp (sym_name
, text
, text_len
) == 0)
6337 /* Finally: If we found a match, prepare the result to return. */
6342 if (comp_match_res
!= NULL
)
6344 std::string
&match_str
= comp_match_res
->match
.storage ();
6347 match_str
= ada_decode (sym_name
);
6351 match_str
= add_angle_brackets (sym_name
);
6353 match_str
= sym_name
;
6357 comp_match_res
->set_match (match_str
.c_str ());
6363 /* Add the list of possible symbol names completing TEXT to TRACKER.
6364 WORD is the entire command on which completion is made. */
6367 ada_collect_symbol_completion_matches (completion_tracker
&tracker
,
6368 complete_symbol_mode mode
,
6369 symbol_name_match_type name_match_type
,
6370 const char *text
, const char *word
,
6371 enum type_code code
)
6374 const struct block
*b
, *surrounding_static_block
= 0;
6375 struct block_iterator iter
;
6377 gdb_assert (code
== TYPE_CODE_UNDEF
);
6379 lookup_name_info
lookup_name (text
, name_match_type
, true);
6381 /* First, look at the partial symtab symbols. */
6382 expand_symtabs_matching (NULL
,
6388 /* At this point scan through the misc symbol vectors and add each
6389 symbol you find to the list. Eventually we want to ignore
6390 anything that isn't a text symbol (everything else will be
6391 handled by the psymtab code above). */
6393 for (objfile
*objfile
: current_program_space
->objfiles ())
6395 for (minimal_symbol
*msymbol
: objfile
->msymbols ())
6399 if (completion_skip_symbol (mode
, msymbol
))
6402 language symbol_language
= msymbol
->language ();
6404 /* Ada minimal symbols won't have their language set to Ada. If
6405 we let completion_list_add_name compare using the
6406 default/C-like matcher, then when completing e.g., symbols in a
6407 package named "pck", we'd match internal Ada symbols like
6408 "pckS", which are invalid in an Ada expression, unless you wrap
6409 them in '<' '>' to request a verbatim match.
6411 Unfortunately, some Ada encoded names successfully demangle as
6412 C++ symbols (using an old mangling scheme), such as "name__2Xn"
6413 -> "Xn::name(void)" and thus some Ada minimal symbols end up
6414 with the wrong language set. Paper over that issue here. */
6415 if (symbol_language
== language_auto
6416 || symbol_language
== language_cplus
)
6417 symbol_language
= language_ada
;
6419 completion_list_add_name (tracker
,
6421 msymbol
->linkage_name (),
6422 lookup_name
, text
, word
);
6426 /* Search upwards from currently selected frame (so that we can
6427 complete on local vars. */
6429 for (b
= get_selected_block (0); b
!= NULL
; b
= BLOCK_SUPERBLOCK (b
))
6431 if (!BLOCK_SUPERBLOCK (b
))
6432 surrounding_static_block
= b
; /* For elmin of dups */
6434 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
6436 if (completion_skip_symbol (mode
, sym
))
6439 completion_list_add_name (tracker
,
6441 sym
->linkage_name (),
6442 lookup_name
, text
, word
);
6446 /* Go through the symtabs and check the externs and statics for
6447 symbols which match. */
6449 for (objfile
*objfile
: current_program_space
->objfiles ())
6451 for (compunit_symtab
*s
: objfile
->compunits ())
6454 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s
), GLOBAL_BLOCK
);
6455 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
6457 if (completion_skip_symbol (mode
, sym
))
6460 completion_list_add_name (tracker
,
6462 sym
->linkage_name (),
6463 lookup_name
, text
, word
);
6468 for (objfile
*objfile
: current_program_space
->objfiles ())
6470 for (compunit_symtab
*s
: objfile
->compunits ())
6473 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s
), STATIC_BLOCK
);
6474 /* Don't do this block twice. */
6475 if (b
== surrounding_static_block
)
6477 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
6479 if (completion_skip_symbol (mode
, sym
))
6482 completion_list_add_name (tracker
,
6484 sym
->linkage_name (),
6485 lookup_name
, text
, word
);
6493 /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used
6494 for tagged types. */
6497 ada_is_dispatch_table_ptr_type (struct type
*type
)
6501 if (type
->code () != TYPE_CODE_PTR
)
6504 name
= TYPE_TARGET_TYPE (type
)->name ();
6508 return (strcmp (name
, "ada__tags__dispatch_table") == 0);
6511 /* Return non-zero if TYPE is an interface tag. */
6514 ada_is_interface_tag (struct type
*type
)
6516 const char *name
= type
->name ();
6521 return (strcmp (name
, "ada__tags__interface_tag") == 0);
6524 /* True if field number FIELD_NUM in struct or union type TYPE is supposed
6525 to be invisible to users. */
6528 ada_is_ignored_field (struct type
*type
, int field_num
)
6530 if (field_num
< 0 || field_num
> TYPE_NFIELDS (type
))
6533 /* Check the name of that field. */
6535 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
6537 /* Anonymous field names should not be printed.
6538 brobecker/2007-02-20: I don't think this can actually happen
6539 but we don't want to print the value of anonymous fields anyway. */
6543 /* Normally, fields whose name start with an underscore ("_")
6544 are fields that have been internally generated by the compiler,
6545 and thus should not be printed. The "_parent" field is special,
6546 however: This is a field internally generated by the compiler
6547 for tagged types, and it contains the components inherited from
6548 the parent type. This field should not be printed as is, but
6549 should not be ignored either. */
6550 if (name
[0] == '_' && !startswith (name
, "_parent"))
6554 /* If this is the dispatch table of a tagged type or an interface tag,
6556 if (ada_is_tagged_type (type
, 1)
6557 && (ada_is_dispatch_table_ptr_type (TYPE_FIELD_TYPE (type
, field_num
))
6558 || ada_is_interface_tag (TYPE_FIELD_TYPE (type
, field_num
))))
6561 /* Not a special field, so it should not be ignored. */
6565 /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a
6566 pointer or reference type whose ultimate target has a tag field. */
6569 ada_is_tagged_type (struct type
*type
, int refok
)
6571 return (ada_lookup_struct_elt_type (type
, "_tag", refok
, 1) != NULL
);
6574 /* True iff TYPE represents the type of X'Tag */
6577 ada_is_tag_type (struct type
*type
)
6579 type
= ada_check_typedef (type
);
6581 if (type
== NULL
|| type
->code () != TYPE_CODE_PTR
)
6585 const char *name
= ada_type_name (TYPE_TARGET_TYPE (type
));
6587 return (name
!= NULL
6588 && strcmp (name
, "ada__tags__dispatch_table") == 0);
6592 /* The type of the tag on VAL. */
6594 static struct type
*
6595 ada_tag_type (struct value
*val
)
6597 return ada_lookup_struct_elt_type (value_type (val
), "_tag", 1, 0);
6600 /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95,
6601 retired at Ada 05). */
6604 is_ada95_tag (struct value
*tag
)
6606 return ada_value_struct_elt (tag
, "tsd", 1) != NULL
;
6609 /* The value of the tag on VAL. */
6611 static struct value
*
6612 ada_value_tag (struct value
*val
)
6614 return ada_value_struct_elt (val
, "_tag", 0);
6617 /* The value of the tag on the object of type TYPE whose contents are
6618 saved at VALADDR, if it is non-null, or is at memory address
6621 static struct value
*
6622 value_tag_from_contents_and_address (struct type
*type
,
6623 const gdb_byte
*valaddr
,
6626 int tag_byte_offset
;
6627 struct type
*tag_type
;
6629 if (find_struct_field ("_tag", type
, 0, &tag_type
, &tag_byte_offset
,
6632 const gdb_byte
*valaddr1
= ((valaddr
== NULL
)
6634 : valaddr
+ tag_byte_offset
);
6635 CORE_ADDR address1
= (address
== 0) ? 0 : address
+ tag_byte_offset
;
6637 return value_from_contents_and_address (tag_type
, valaddr1
, address1
);
6642 static struct type
*
6643 type_from_tag (struct value
*tag
)
6645 const char *type_name
= ada_tag_name (tag
);
6647 if (type_name
!= NULL
)
6648 return ada_find_any_type (ada_encode (type_name
));
6652 /* Given a value OBJ of a tagged type, return a value of this
6653 type at the base address of the object. The base address, as
6654 defined in Ada.Tags, it is the address of the primary tag of
6655 the object, and therefore where the field values of its full
6656 view can be fetched. */
6659 ada_tag_value_at_base_address (struct value
*obj
)
6662 LONGEST offset_to_top
= 0;
6663 struct type
*ptr_type
, *obj_type
;
6665 CORE_ADDR base_address
;
6667 obj_type
= value_type (obj
);
6669 /* It is the responsability of the caller to deref pointers. */
6671 if (obj_type
->code () == TYPE_CODE_PTR
|| obj_type
->code () == TYPE_CODE_REF
)
6674 tag
= ada_value_tag (obj
);
6678 /* Base addresses only appeared with Ada 05 and multiple inheritance. */
6680 if (is_ada95_tag (tag
))
6683 ptr_type
= language_lookup_primitive_type
6684 (language_def (language_ada
), target_gdbarch(), "storage_offset");
6685 ptr_type
= lookup_pointer_type (ptr_type
);
6686 val
= value_cast (ptr_type
, tag
);
6690 /* It is perfectly possible that an exception be raised while
6691 trying to determine the base address, just like for the tag;
6692 see ada_tag_name for more details. We do not print the error
6693 message for the same reason. */
6697 offset_to_top
= value_as_long (value_ind (value_ptradd (val
, -2)));
6700 catch (const gdb_exception_error
&e
)
6705 /* If offset is null, nothing to do. */
6707 if (offset_to_top
== 0)
6710 /* -1 is a special case in Ada.Tags; however, what should be done
6711 is not quite clear from the documentation. So do nothing for
6714 if (offset_to_top
== -1)
6717 /* OFFSET_TO_TOP used to be a positive value to be subtracted
6718 from the base address. This was however incompatible with
6719 C++ dispatch table: C++ uses a *negative* value to *add*
6720 to the base address. Ada's convention has therefore been
6721 changed in GNAT 19.0w 20171023: since then, C++ and Ada
6722 use the same convention. Here, we support both cases by
6723 checking the sign of OFFSET_TO_TOP. */
6725 if (offset_to_top
> 0)
6726 offset_to_top
= -offset_to_top
;
6728 base_address
= value_address (obj
) + offset_to_top
;
6729 tag
= value_tag_from_contents_and_address (obj_type
, NULL
, base_address
);
6731 /* Make sure that we have a proper tag at the new address.
6732 Otherwise, offset_to_top is bogus (which can happen when
6733 the object is not initialized yet). */
6738 obj_type
= type_from_tag (tag
);
6743 return value_from_contents_and_address (obj_type
, NULL
, base_address
);
6746 /* Return the "ada__tags__type_specific_data" type. */
6748 static struct type
*
6749 ada_get_tsd_type (struct inferior
*inf
)
6751 struct ada_inferior_data
*data
= get_ada_inferior_data (inf
);
6753 if (data
->tsd_type
== 0)
6754 data
->tsd_type
= ada_find_any_type ("ada__tags__type_specific_data");
6755 return data
->tsd_type
;
6758 /* Return the TSD (type-specific data) associated to the given TAG.
6759 TAG is assumed to be the tag of a tagged-type entity.
6761 May return NULL if we are unable to get the TSD. */
6763 static struct value
*
6764 ada_get_tsd_from_tag (struct value
*tag
)
6769 /* First option: The TSD is simply stored as a field of our TAG.
6770 Only older versions of GNAT would use this format, but we have
6771 to test it first, because there are no visible markers for
6772 the current approach except the absence of that field. */
6774 val
= ada_value_struct_elt (tag
, "tsd", 1);
6778 /* Try the second representation for the dispatch table (in which
6779 there is no explicit 'tsd' field in the referent of the tag pointer,
6780 and instead the tsd pointer is stored just before the dispatch
6783 type
= ada_get_tsd_type (current_inferior());
6786 type
= lookup_pointer_type (lookup_pointer_type (type
));
6787 val
= value_cast (type
, tag
);
6790 return value_ind (value_ptradd (val
, -1));
6793 /* Given the TSD of a tag (type-specific data), return a string
6794 containing the name of the associated type.
6796 The returned value is good until the next call. May return NULL
6797 if we are unable to determine the tag name. */
6800 ada_tag_name_from_tsd (struct value
*tsd
)
6802 static char name
[1024];
6806 val
= ada_value_struct_elt (tsd
, "expanded_name", 1);
6809 read_memory_string (value_as_address (val
), name
, sizeof (name
) - 1);
6810 for (p
= name
; *p
!= '\0'; p
+= 1)
6816 /* The type name of the dynamic type denoted by the 'tag value TAG, as
6819 Return NULL if the TAG is not an Ada tag, or if we were unable to
6820 determine the name of that tag. The result is good until the next
6824 ada_tag_name (struct value
*tag
)
6828 if (!ada_is_tag_type (value_type (tag
)))
6831 /* It is perfectly possible that an exception be raised while trying
6832 to determine the TAG's name, even under normal circumstances:
6833 The associated variable may be uninitialized or corrupted, for
6834 instance. We do not let any exception propagate past this point.
6835 instead we return NULL.
6837 We also do not print the error message either (which often is very
6838 low-level (Eg: "Cannot read memory at 0x[...]"), but instead let
6839 the caller print a more meaningful message if necessary. */
6842 struct value
*tsd
= ada_get_tsd_from_tag (tag
);
6845 name
= ada_tag_name_from_tsd (tsd
);
6847 catch (const gdb_exception_error
&e
)
6854 /* The parent type of TYPE, or NULL if none. */
6857 ada_parent_type (struct type
*type
)
6861 type
= ada_check_typedef (type
);
6863 if (type
== NULL
|| type
->code () != TYPE_CODE_STRUCT
)
6866 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
6867 if (ada_is_parent_field (type
, i
))
6869 struct type
*parent_type
= TYPE_FIELD_TYPE (type
, i
);
6871 /* If the _parent field is a pointer, then dereference it. */
6872 if (parent_type
->code () == TYPE_CODE_PTR
)
6873 parent_type
= TYPE_TARGET_TYPE (parent_type
);
6874 /* If there is a parallel XVS type, get the actual base type. */
6875 parent_type
= ada_get_base_type (parent_type
);
6877 return ada_check_typedef (parent_type
);
6883 /* True iff field number FIELD_NUM of structure type TYPE contains the
6884 parent-type (inherited) fields of a derived type. Assumes TYPE is
6885 a structure type with at least FIELD_NUM+1 fields. */
6888 ada_is_parent_field (struct type
*type
, int field_num
)
6890 const char *name
= TYPE_FIELD_NAME (ada_check_typedef (type
), field_num
);
6892 return (name
!= NULL
6893 && (startswith (name
, "PARENT")
6894 || startswith (name
, "_parent")));
6897 /* True iff field number FIELD_NUM of structure type TYPE is a
6898 transparent wrapper field (which should be silently traversed when doing
6899 field selection and flattened when printing). Assumes TYPE is a
6900 structure type with at least FIELD_NUM+1 fields. Such fields are always
6904 ada_is_wrapper_field (struct type
*type
, int field_num
)
6906 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
6908 if (name
!= NULL
&& strcmp (name
, "RETVAL") == 0)
6910 /* This happens in functions with "out" or "in out" parameters
6911 which are passed by copy. For such functions, GNAT describes
6912 the function's return type as being a struct where the return
6913 value is in a field called RETVAL, and where the other "out"
6914 or "in out" parameters are fields of that struct. This is not
6919 return (name
!= NULL
6920 && (startswith (name
, "PARENT")
6921 || strcmp (name
, "REP") == 0
6922 || startswith (name
, "_parent")
6923 || name
[0] == 'S' || name
[0] == 'R' || name
[0] == 'O'));
6926 /* True iff field number FIELD_NUM of structure or union type TYPE
6927 is a variant wrapper. Assumes TYPE is a structure type with at least
6928 FIELD_NUM+1 fields. */
6931 ada_is_variant_part (struct type
*type
, int field_num
)
6933 /* Only Ada types are eligible. */
6934 if (!ADA_TYPE_P (type
))
6937 struct type
*field_type
= TYPE_FIELD_TYPE (type
, field_num
);
6939 return (field_type
->code () == TYPE_CODE_UNION
6940 || (is_dynamic_field (type
, field_num
)
6941 && (TYPE_TARGET_TYPE (field_type
)->code ()
6942 == TYPE_CODE_UNION
)));
6945 /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part)
6946 whose discriminants are contained in the record type OUTER_TYPE,
6947 returns the type of the controlling discriminant for the variant.
6948 May return NULL if the type could not be found. */
6951 ada_variant_discrim_type (struct type
*var_type
, struct type
*outer_type
)
6953 const char *name
= ada_variant_discrim_name (var_type
);
6955 return ada_lookup_struct_elt_type (outer_type
, name
, 1, 1);
6958 /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a
6959 valid field number within it, returns 1 iff field FIELD_NUM of TYPE
6960 represents a 'when others' clause; otherwise 0. */
6963 ada_is_others_clause (struct type
*type
, int field_num
)
6965 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
6967 return (name
!= NULL
&& name
[0] == 'O');
6970 /* Assuming that TYPE0 is the type of the variant part of a record,
6971 returns the name of the discriminant controlling the variant.
6972 The value is valid until the next call to ada_variant_discrim_name. */
6975 ada_variant_discrim_name (struct type
*type0
)
6977 static char *result
= NULL
;
6978 static size_t result_len
= 0;
6981 const char *discrim_end
;
6982 const char *discrim_start
;
6984 if (type0
->code () == TYPE_CODE_PTR
)
6985 type
= TYPE_TARGET_TYPE (type0
);
6989 name
= ada_type_name (type
);
6991 if (name
== NULL
|| name
[0] == '\000')
6994 for (discrim_end
= name
+ strlen (name
) - 6; discrim_end
!= name
;
6997 if (startswith (discrim_end
, "___XVN"))
7000 if (discrim_end
== name
)
7003 for (discrim_start
= discrim_end
; discrim_start
!= name
+ 3;
7006 if (discrim_start
== name
+ 1)
7008 if ((discrim_start
> name
+ 3
7009 && startswith (discrim_start
- 3, "___"))
7010 || discrim_start
[-1] == '.')
7014 GROW_VECT (result
, result_len
, discrim_end
- discrim_start
+ 1);
7015 strncpy (result
, discrim_start
, discrim_end
- discrim_start
);
7016 result
[discrim_end
- discrim_start
] = '\0';
7020 /* Scan STR for a subtype-encoded number, beginning at position K.
7021 Put the position of the character just past the number scanned in
7022 *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL.
7023 Return 1 if there was a valid number at the given position, and 0
7024 otherwise. A "subtype-encoded" number consists of the absolute value
7025 in decimal, followed by the letter 'm' to indicate a negative number.
7026 Assumes 0m does not occur. */
7029 ada_scan_number (const char str
[], int k
, LONGEST
* R
, int *new_k
)
7033 if (!isdigit (str
[k
]))
7036 /* Do it the hard way so as not to make any assumption about
7037 the relationship of unsigned long (%lu scan format code) and
7040 while (isdigit (str
[k
]))
7042 RU
= RU
* 10 + (str
[k
] - '0');
7049 *R
= (-(LONGEST
) (RU
- 1)) - 1;
7055 /* NOTE on the above: Technically, C does not say what the results of
7056 - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive
7057 number representable as a LONGEST (although either would probably work
7058 in most implementations). When RU>0, the locution in the then branch
7059 above is always equivalent to the negative of RU. */
7066 /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field),
7067 and FIELD_NUM is a valid field number within it, returns 1 iff VAL is
7068 in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */
7071 ada_in_variant (LONGEST val
, struct type
*type
, int field_num
)
7073 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
7087 if (!ada_scan_number (name
, p
+ 1, &W
, &p
))
7097 if (!ada_scan_number (name
, p
+ 1, &L
, &p
)
7098 || name
[p
] != 'T' || !ada_scan_number (name
, p
+ 1, &U
, &p
))
7100 if (val
>= L
&& val
<= U
)
7112 /* FIXME: Lots of redundancy below. Try to consolidate. */
7114 /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type
7115 ARG_TYPE, extract and return the value of one of its (non-static)
7116 fields. FIELDNO says which field. Differs from value_primitive_field
7117 only in that it can handle packed values of arbitrary type. */
7120 ada_value_primitive_field (struct value
*arg1
, int offset
, int fieldno
,
7121 struct type
*arg_type
)
7125 arg_type
= ada_check_typedef (arg_type
);
7126 type
= TYPE_FIELD_TYPE (arg_type
, fieldno
);
7128 /* Handle packed fields. It might be that the field is not packed
7129 relative to its containing structure, but the structure itself is
7130 packed; in this case we must take the bit-field path. */
7131 if (TYPE_FIELD_BITSIZE (arg_type
, fieldno
) != 0 || value_bitpos (arg1
) != 0)
7133 int bit_pos
= TYPE_FIELD_BITPOS (arg_type
, fieldno
);
7134 int bit_size
= TYPE_FIELD_BITSIZE (arg_type
, fieldno
);
7136 return ada_value_primitive_packed_val (arg1
, value_contents (arg1
),
7137 offset
+ bit_pos
/ 8,
7138 bit_pos
% 8, bit_size
, type
);
7141 return value_primitive_field (arg1
, offset
, fieldno
, arg_type
);
7144 /* Find field with name NAME in object of type TYPE. If found,
7145 set the following for each argument that is non-null:
7146 - *FIELD_TYPE_P to the field's type;
7147 - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within
7148 an object of that type;
7149 - *BIT_OFFSET_P to the bit offset modulo byte size of the field;
7150 - *BIT_SIZE_P to its size in bits if the field is packed, and
7152 If INDEX_P is non-null, increment *INDEX_P by the number of source-visible
7153 fields up to but not including the desired field, or by the total
7154 number of fields if not found. A NULL value of NAME never
7155 matches; the function just counts visible fields in this case.
7157 Notice that we need to handle when a tagged record hierarchy
7158 has some components with the same name, like in this scenario:
7160 type Top_T is tagged record
7166 type Middle_T is new Top.Top_T with record
7167 N : Character := 'a';
7171 type Bottom_T is new Middle.Middle_T with record
7173 C : Character := '5';
7175 A : Character := 'J';
7178 Let's say we now have a variable declared and initialized as follow:
7180 TC : Top_A := new Bottom_T;
7182 And then we use this variable to call this function
7184 procedure Assign (Obj: in out Top_T; TV : Integer);
7188 Assign (Top_T (B), 12);
7190 Now, we're in the debugger, and we're inside that procedure
7191 then and we want to print the value of obj.c:
7193 Usually, the tagged record or one of the parent type owns the
7194 component to print and there's no issue but in this particular
7195 case, what does it mean to ask for Obj.C? Since the actual
7196 type for object is type Bottom_T, it could mean two things: type
7197 component C from the Middle_T view, but also component C from
7198 Bottom_T. So in that "undefined" case, when the component is
7199 not found in the non-resolved type (which includes all the
7200 components of the parent type), then resolve it and see if we
7201 get better luck once expanded.
7203 In the case of homonyms in the derived tagged type, we don't
7204 guaranty anything, and pick the one that's easiest for us
7207 Returns 1 if found, 0 otherwise. */
7210 find_struct_field (const char *name
, struct type
*type
, int offset
,
7211 struct type
**field_type_p
,
7212 int *byte_offset_p
, int *bit_offset_p
, int *bit_size_p
,
7216 int parent_offset
= -1;
7218 type
= ada_check_typedef (type
);
7220 if (field_type_p
!= NULL
)
7221 *field_type_p
= NULL
;
7222 if (byte_offset_p
!= NULL
)
7224 if (bit_offset_p
!= NULL
)
7226 if (bit_size_p
!= NULL
)
7229 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
7231 int bit_pos
= TYPE_FIELD_BITPOS (type
, i
);
7232 int fld_offset
= offset
+ bit_pos
/ 8;
7233 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
7235 if (t_field_name
== NULL
)
7238 else if (ada_is_parent_field (type
, i
))
7240 /* This is a field pointing us to the parent type of a tagged
7241 type. As hinted in this function's documentation, we give
7242 preference to fields in the current record first, so what
7243 we do here is just record the index of this field before
7244 we skip it. If it turns out we couldn't find our field
7245 in the current record, then we'll get back to it and search
7246 inside it whether the field might exist in the parent. */
7252 else if (name
!= NULL
&& field_name_match (t_field_name
, name
))
7254 int bit_size
= TYPE_FIELD_BITSIZE (type
, i
);
7256 if (field_type_p
!= NULL
)
7257 *field_type_p
= TYPE_FIELD_TYPE (type
, i
);
7258 if (byte_offset_p
!= NULL
)
7259 *byte_offset_p
= fld_offset
;
7260 if (bit_offset_p
!= NULL
)
7261 *bit_offset_p
= bit_pos
% 8;
7262 if (bit_size_p
!= NULL
)
7263 *bit_size_p
= bit_size
;
7266 else if (ada_is_wrapper_field (type
, i
))
7268 if (find_struct_field (name
, TYPE_FIELD_TYPE (type
, i
), fld_offset
,
7269 field_type_p
, byte_offset_p
, bit_offset_p
,
7270 bit_size_p
, index_p
))
7273 else if (ada_is_variant_part (type
, i
))
7275 /* PNH: Wait. Do we ever execute this section, or is ARG always of
7278 struct type
*field_type
7279 = ada_check_typedef (TYPE_FIELD_TYPE (type
, i
));
7281 for (j
= 0; j
< TYPE_NFIELDS (field_type
); j
+= 1)
7283 if (find_struct_field (name
, TYPE_FIELD_TYPE (field_type
, j
),
7285 + TYPE_FIELD_BITPOS (field_type
, j
) / 8,
7286 field_type_p
, byte_offset_p
,
7287 bit_offset_p
, bit_size_p
, index_p
))
7291 else if (index_p
!= NULL
)
7295 /* Field not found so far. If this is a tagged type which
7296 has a parent, try finding that field in the parent now. */
7298 if (parent_offset
!= -1)
7300 int bit_pos
= TYPE_FIELD_BITPOS (type
, parent_offset
);
7301 int fld_offset
= offset
+ bit_pos
/ 8;
7303 if (find_struct_field (name
, TYPE_FIELD_TYPE (type
, parent_offset
),
7304 fld_offset
, field_type_p
, byte_offset_p
,
7305 bit_offset_p
, bit_size_p
, index_p
))
7312 /* Number of user-visible fields in record type TYPE. */
7315 num_visible_fields (struct type
*type
)
7320 find_struct_field (NULL
, type
, 0, NULL
, NULL
, NULL
, NULL
, &n
);
7324 /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes,
7325 and search in it assuming it has (class) type TYPE.
7326 If found, return value, else return NULL.
7328 Searches recursively through wrapper fields (e.g., '_parent').
7330 In the case of homonyms in the tagged types, please refer to the
7331 long explanation in find_struct_field's function documentation. */
7333 static struct value
*
7334 ada_search_struct_field (const char *name
, struct value
*arg
, int offset
,
7338 int parent_offset
= -1;
7340 type
= ada_check_typedef (type
);
7341 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
7343 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
7345 if (t_field_name
== NULL
)
7348 else if (ada_is_parent_field (type
, i
))
7350 /* This is a field pointing us to the parent type of a tagged
7351 type. As hinted in this function's documentation, we give
7352 preference to fields in the current record first, so what
7353 we do here is just record the index of this field before
7354 we skip it. If it turns out we couldn't find our field
7355 in the current record, then we'll get back to it and search
7356 inside it whether the field might exist in the parent. */
7362 else if (field_name_match (t_field_name
, name
))
7363 return ada_value_primitive_field (arg
, offset
, i
, type
);
7365 else if (ada_is_wrapper_field (type
, i
))
7367 struct value
*v
= /* Do not let indent join lines here. */
7368 ada_search_struct_field (name
, arg
,
7369 offset
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
7370 TYPE_FIELD_TYPE (type
, i
));
7376 else if (ada_is_variant_part (type
, i
))
7378 /* PNH: Do we ever get here? See find_struct_field. */
7380 struct type
*field_type
= ada_check_typedef (TYPE_FIELD_TYPE (type
,
7382 int var_offset
= offset
+ TYPE_FIELD_BITPOS (type
, i
) / 8;
7384 for (j
= 0; j
< TYPE_NFIELDS (field_type
); j
+= 1)
7386 struct value
*v
= ada_search_struct_field
/* Force line
7389 var_offset
+ TYPE_FIELD_BITPOS (field_type
, j
) / 8,
7390 TYPE_FIELD_TYPE (field_type
, j
));
7398 /* Field not found so far. If this is a tagged type which
7399 has a parent, try finding that field in the parent now. */
7401 if (parent_offset
!= -1)
7403 struct value
*v
= ada_search_struct_field (
7404 name
, arg
, offset
+ TYPE_FIELD_BITPOS (type
, parent_offset
) / 8,
7405 TYPE_FIELD_TYPE (type
, parent_offset
));
7414 static struct value
*ada_index_struct_field_1 (int *, struct value
*,
7415 int, struct type
*);
7418 /* Return field #INDEX in ARG, where the index is that returned by
7419 * find_struct_field through its INDEX_P argument. Adjust the address
7420 * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE.
7421 * If found, return value, else return NULL. */
7423 static struct value
*
7424 ada_index_struct_field (int index
, struct value
*arg
, int offset
,
7427 return ada_index_struct_field_1 (&index
, arg
, offset
, type
);
7431 /* Auxiliary function for ada_index_struct_field. Like
7432 * ada_index_struct_field, but takes index from *INDEX_P and modifies
7435 static struct value
*
7436 ada_index_struct_field_1 (int *index_p
, struct value
*arg
, int offset
,
7440 type
= ada_check_typedef (type
);
7442 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
7444 if (TYPE_FIELD_NAME (type
, i
) == NULL
)
7446 else if (ada_is_wrapper_field (type
, i
))
7448 struct value
*v
= /* Do not let indent join lines here. */
7449 ada_index_struct_field_1 (index_p
, arg
,
7450 offset
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
7451 TYPE_FIELD_TYPE (type
, i
));
7457 else if (ada_is_variant_part (type
, i
))
7459 /* PNH: Do we ever get here? See ada_search_struct_field,
7460 find_struct_field. */
7461 error (_("Cannot assign this kind of variant record"));
7463 else if (*index_p
== 0)
7464 return ada_value_primitive_field (arg
, offset
, i
, type
);
7471 /* Return a string representation of type TYPE. */
7474 type_as_string (struct type
*type
)
7476 string_file tmp_stream
;
7478 type_print (type
, "", &tmp_stream
, -1);
7480 return std::move (tmp_stream
.string ());
7483 /* Given a type TYPE, look up the type of the component of type named NAME.
7484 If DISPP is non-null, add its byte displacement from the beginning of a
7485 structure (pointed to by a value) of type TYPE to *DISPP (does not
7486 work for packed fields).
7488 Matches any field whose name has NAME as a prefix, possibly
7491 TYPE can be either a struct or union. If REFOK, TYPE may also
7492 be a (pointer or reference)+ to a struct or union, and the
7493 ultimate target type will be searched.
7495 Looks recursively into variant clauses and parent types.
7497 In the case of homonyms in the tagged types, please refer to the
7498 long explanation in find_struct_field's function documentation.
7500 If NOERR is nonzero, return NULL if NAME is not suitably defined or
7501 TYPE is not a type of the right kind. */
7503 static struct type
*
7504 ada_lookup_struct_elt_type (struct type
*type
, const char *name
, int refok
,
7508 int parent_offset
= -1;
7513 if (refok
&& type
!= NULL
)
7516 type
= ada_check_typedef (type
);
7517 if (type
->code () != TYPE_CODE_PTR
&& type
->code () != TYPE_CODE_REF
)
7519 type
= TYPE_TARGET_TYPE (type
);
7523 || (type
->code () != TYPE_CODE_STRUCT
7524 && type
->code () != TYPE_CODE_UNION
))
7529 error (_("Type %s is not a structure or union type"),
7530 type
!= NULL
? type_as_string (type
).c_str () : _("(null)"));
7533 type
= to_static_fixed_type (type
);
7535 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
7537 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
7540 if (t_field_name
== NULL
)
7543 else if (ada_is_parent_field (type
, i
))
7545 /* This is a field pointing us to the parent type of a tagged
7546 type. As hinted in this function's documentation, we give
7547 preference to fields in the current record first, so what
7548 we do here is just record the index of this field before
7549 we skip it. If it turns out we couldn't find our field
7550 in the current record, then we'll get back to it and search
7551 inside it whether the field might exist in the parent. */
7557 else if (field_name_match (t_field_name
, name
))
7558 return TYPE_FIELD_TYPE (type
, i
);
7560 else if (ada_is_wrapper_field (type
, i
))
7562 t
= ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type
, i
), name
,
7568 else if (ada_is_variant_part (type
, i
))
7571 struct type
*field_type
= ada_check_typedef (TYPE_FIELD_TYPE (type
,
7574 for (j
= TYPE_NFIELDS (field_type
) - 1; j
>= 0; j
-= 1)
7576 /* FIXME pnh 2008/01/26: We check for a field that is
7577 NOT wrapped in a struct, since the compiler sometimes
7578 generates these for unchecked variant types. Revisit
7579 if the compiler changes this practice. */
7580 const char *v_field_name
= TYPE_FIELD_NAME (field_type
, j
);
7582 if (v_field_name
!= NULL
7583 && field_name_match (v_field_name
, name
))
7584 t
= TYPE_FIELD_TYPE (field_type
, j
);
7586 t
= ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (field_type
,
7597 /* Field not found so far. If this is a tagged type which
7598 has a parent, try finding that field in the parent now. */
7600 if (parent_offset
!= -1)
7604 t
= ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type
, parent_offset
),
7613 const char *name_str
= name
!= NULL
? name
: _("<null>");
7615 error (_("Type %s has no component named %s"),
7616 type_as_string (type
).c_str (), name_str
);
7622 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7623 within a value of type OUTER_TYPE, return true iff VAR_TYPE
7624 represents an unchecked union (that is, the variant part of a
7625 record that is named in an Unchecked_Union pragma). */
7628 is_unchecked_variant (struct type
*var_type
, struct type
*outer_type
)
7630 const char *discrim_name
= ada_variant_discrim_name (var_type
);
7632 return (ada_lookup_struct_elt_type (outer_type
, discrim_name
, 0, 1) == NULL
);
7636 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7637 within OUTER, determine which variant clause (field number in VAR_TYPE,
7638 numbering from 0) is applicable. Returns -1 if none are. */
7641 ada_which_variant_applies (struct type
*var_type
, struct value
*outer
)
7645 const char *discrim_name
= ada_variant_discrim_name (var_type
);
7646 struct value
*discrim
;
7647 LONGEST discrim_val
;
7649 /* Using plain value_from_contents_and_address here causes problems
7650 because we will end up trying to resolve a type that is currently
7651 being constructed. */
7652 discrim
= ada_value_struct_elt (outer
, discrim_name
, 1);
7653 if (discrim
== NULL
)
7655 discrim_val
= value_as_long (discrim
);
7658 for (i
= 0; i
< TYPE_NFIELDS (var_type
); i
+= 1)
7660 if (ada_is_others_clause (var_type
, i
))
7662 else if (ada_in_variant (discrim_val
, var_type
, i
))
7666 return others_clause
;
7671 /* Dynamic-Sized Records */
7673 /* Strategy: The type ostensibly attached to a value with dynamic size
7674 (i.e., a size that is not statically recorded in the debugging
7675 data) does not accurately reflect the size or layout of the value.
7676 Our strategy is to convert these values to values with accurate,
7677 conventional types that are constructed on the fly. */
7679 /* There is a subtle and tricky problem here. In general, we cannot
7680 determine the size of dynamic records without its data. However,
7681 the 'struct value' data structure, which GDB uses to represent
7682 quantities in the inferior process (the target), requires the size
7683 of the type at the time of its allocation in order to reserve space
7684 for GDB's internal copy of the data. That's why the
7685 'to_fixed_xxx_type' routines take (target) addresses as parameters,
7686 rather than struct value*s.
7688 However, GDB's internal history variables ($1, $2, etc.) are
7689 struct value*s containing internal copies of the data that are not, in
7690 general, the same as the data at their corresponding addresses in
7691 the target. Fortunately, the types we give to these values are all
7692 conventional, fixed-size types (as per the strategy described
7693 above), so that we don't usually have to perform the
7694 'to_fixed_xxx_type' conversions to look at their values.
7695 Unfortunately, there is one exception: if one of the internal
7696 history variables is an array whose elements are unconstrained
7697 records, then we will need to create distinct fixed types for each
7698 element selected. */
7700 /* The upshot of all of this is that many routines take a (type, host
7701 address, target address) triple as arguments to represent a value.
7702 The host address, if non-null, is supposed to contain an internal
7703 copy of the relevant data; otherwise, the program is to consult the
7704 target at the target address. */
7706 /* Assuming that VAL0 represents a pointer value, the result of
7707 dereferencing it. Differs from value_ind in its treatment of
7708 dynamic-sized types. */
7711 ada_value_ind (struct value
*val0
)
7713 struct value
*val
= value_ind (val0
);
7715 if (ada_is_tagged_type (value_type (val
), 0))
7716 val
= ada_tag_value_at_base_address (val
);
7718 return ada_to_fixed_value (val
);
7721 /* The value resulting from dereferencing any "reference to"
7722 qualifiers on VAL0. */
7724 static struct value
*
7725 ada_coerce_ref (struct value
*val0
)
7727 if (value_type (val0
)->code () == TYPE_CODE_REF
)
7729 struct value
*val
= val0
;
7731 val
= coerce_ref (val
);
7733 if (ada_is_tagged_type (value_type (val
), 0))
7734 val
= ada_tag_value_at_base_address (val
);
7736 return ada_to_fixed_value (val
);
7742 /* Return the bit alignment required for field #F of template type TYPE. */
7745 field_alignment (struct type
*type
, int f
)
7747 const char *name
= TYPE_FIELD_NAME (type
, f
);
7751 /* The field name should never be null, unless the debugging information
7752 is somehow malformed. In this case, we assume the field does not
7753 require any alignment. */
7757 len
= strlen (name
);
7759 if (!isdigit (name
[len
- 1]))
7762 if (isdigit (name
[len
- 2]))
7763 align_offset
= len
- 2;
7765 align_offset
= len
- 1;
7767 if (align_offset
< 7 || !startswith (name
+ align_offset
- 6, "___XV"))
7768 return TARGET_CHAR_BIT
;
7770 return atoi (name
+ align_offset
) * TARGET_CHAR_BIT
;
7773 /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */
7775 static struct symbol
*
7776 ada_find_any_type_symbol (const char *name
)
7780 sym
= standard_lookup (name
, get_selected_block (NULL
), VAR_DOMAIN
);
7781 if (sym
!= NULL
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
7784 sym
= standard_lookup (name
, NULL
, STRUCT_DOMAIN
);
7788 /* Find a type named NAME. Ignores ambiguity. This routine will look
7789 solely for types defined by debug info, it will not search the GDB
7792 static struct type
*
7793 ada_find_any_type (const char *name
)
7795 struct symbol
*sym
= ada_find_any_type_symbol (name
);
7798 return SYMBOL_TYPE (sym
);
7803 /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol
7804 associated with NAME_SYM's name. NAME_SYM may itself be a renaming
7805 symbol, in which case it is returned. Otherwise, this looks for
7806 symbols whose name is that of NAME_SYM suffixed with "___XR".
7807 Return symbol if found, and NULL otherwise. */
7810 ada_is_renaming_symbol (struct symbol
*name_sym
)
7812 const char *name
= name_sym
->linkage_name ();
7813 return strstr (name
, "___XR") != NULL
;
7816 /* Because of GNAT encoding conventions, several GDB symbols may match a
7817 given type name. If the type denoted by TYPE0 is to be preferred to
7818 that of TYPE1 for purposes of type printing, return non-zero;
7819 otherwise return 0. */
7822 ada_prefer_type (struct type
*type0
, struct type
*type1
)
7826 else if (type0
== NULL
)
7828 else if (type1
->code () == TYPE_CODE_VOID
)
7830 else if (type0
->code () == TYPE_CODE_VOID
)
7832 else if (type1
->name () == NULL
&& type0
->name () != NULL
)
7834 else if (ada_is_constrained_packed_array_type (type0
))
7836 else if (ada_is_array_descriptor_type (type0
)
7837 && !ada_is_array_descriptor_type (type1
))
7841 const char *type0_name
= type0
->name ();
7842 const char *type1_name
= type1
->name ();
7844 if (type0_name
!= NULL
&& strstr (type0_name
, "___XR") != NULL
7845 && (type1_name
== NULL
|| strstr (type1_name
, "___XR") == NULL
))
7851 /* The name of TYPE, which is its TYPE_NAME. Null if TYPE is
7855 ada_type_name (struct type
*type
)
7859 return type
->name ();
7862 /* Search the list of "descriptive" types associated to TYPE for a type
7863 whose name is NAME. */
7865 static struct type
*
7866 find_parallel_type_by_descriptive_type (struct type
*type
, const char *name
)
7868 struct type
*result
, *tmp
;
7870 if (ada_ignore_descriptive_types_p
)
7873 /* If there no descriptive-type info, then there is no parallel type
7875 if (!HAVE_GNAT_AUX_INFO (type
))
7878 result
= TYPE_DESCRIPTIVE_TYPE (type
);
7879 while (result
!= NULL
)
7881 const char *result_name
= ada_type_name (result
);
7883 if (result_name
== NULL
)
7885 warning (_("unexpected null name on descriptive type"));
7889 /* If the names match, stop. */
7890 if (strcmp (result_name
, name
) == 0)
7893 /* Otherwise, look at the next item on the list, if any. */
7894 if (HAVE_GNAT_AUX_INFO (result
))
7895 tmp
= TYPE_DESCRIPTIVE_TYPE (result
);
7899 /* If not found either, try after having resolved the typedef. */
7904 result
= check_typedef (result
);
7905 if (HAVE_GNAT_AUX_INFO (result
))
7906 result
= TYPE_DESCRIPTIVE_TYPE (result
);
7912 /* If we didn't find a match, see whether this is a packed array. With
7913 older compilers, the descriptive type information is either absent or
7914 irrelevant when it comes to packed arrays so the above lookup fails.
7915 Fall back to using a parallel lookup by name in this case. */
7916 if (result
== NULL
&& ada_is_constrained_packed_array_type (type
))
7917 return ada_find_any_type (name
);
7922 /* Find a parallel type to TYPE with the specified NAME, using the
7923 descriptive type taken from the debugging information, if available,
7924 and otherwise using the (slower) name-based method. */
7926 static struct type
*
7927 ada_find_parallel_type_with_name (struct type
*type
, const char *name
)
7929 struct type
*result
= NULL
;
7931 if (HAVE_GNAT_AUX_INFO (type
))
7932 result
= find_parallel_type_by_descriptive_type (type
, name
);
7934 result
= ada_find_any_type (name
);
7939 /* Same as above, but specify the name of the parallel type by appending
7940 SUFFIX to the name of TYPE. */
7943 ada_find_parallel_type (struct type
*type
, const char *suffix
)
7946 const char *type_name
= ada_type_name (type
);
7949 if (type_name
== NULL
)
7952 len
= strlen (type_name
);
7954 name
= (char *) alloca (len
+ strlen (suffix
) + 1);
7956 strcpy (name
, type_name
);
7957 strcpy (name
+ len
, suffix
);
7959 return ada_find_parallel_type_with_name (type
, name
);
7962 /* If TYPE is a variable-size record type, return the corresponding template
7963 type describing its fields. Otherwise, return NULL. */
7965 static struct type
*
7966 dynamic_template_type (struct type
*type
)
7968 type
= ada_check_typedef (type
);
7970 if (type
== NULL
|| type
->code () != TYPE_CODE_STRUCT
7971 || ada_type_name (type
) == NULL
)
7975 int len
= strlen (ada_type_name (type
));
7977 if (len
> 6 && strcmp (ada_type_name (type
) + len
- 6, "___XVE") == 0)
7980 return ada_find_parallel_type (type
, "___XVE");
7984 /* Assuming that TEMPL_TYPE is a union or struct type, returns
7985 non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */
7988 is_dynamic_field (struct type
*templ_type
, int field_num
)
7990 const char *name
= TYPE_FIELD_NAME (templ_type
, field_num
);
7993 && TYPE_FIELD_TYPE (templ_type
, field_num
)->code () == TYPE_CODE_PTR
7994 && strstr (name
, "___XVL") != NULL
;
7997 /* The index of the variant field of TYPE, or -1 if TYPE does not
7998 represent a variant record type. */
8001 variant_field_index (struct type
*type
)
8005 if (type
== NULL
|| type
->code () != TYPE_CODE_STRUCT
)
8008 for (f
= 0; f
< TYPE_NFIELDS (type
); f
+= 1)
8010 if (ada_is_variant_part (type
, f
))
8016 /* A record type with no fields. */
8018 static struct type
*
8019 empty_record (struct type
*templ
)
8021 struct type
*type
= alloc_type_copy (templ
);
8023 type
->set_code (TYPE_CODE_STRUCT
);
8024 TYPE_NFIELDS (type
) = 0;
8025 TYPE_FIELDS (type
) = NULL
;
8026 INIT_NONE_SPECIFIC (type
);
8027 type
->set_name ("<empty>");
8028 TYPE_LENGTH (type
) = 0;
8032 /* An ordinary record type (with fixed-length fields) that describes
8033 the value of type TYPE at VALADDR or ADDRESS (see comments at
8034 the beginning of this section) VAL according to GNAT conventions.
8035 DVAL0 should describe the (portion of a) record that contains any
8036 necessary discriminants. It should be NULL if value_type (VAL) is
8037 an outer-level type (i.e., as opposed to a branch of a variant.) A
8038 variant field (unless unchecked) is replaced by a particular branch
8041 If not KEEP_DYNAMIC_FIELDS, then all fields whose position or
8042 length are not statically known are discarded. As a consequence,
8043 VALADDR, ADDRESS and DVAL0 are ignored.
8045 NOTE: Limitations: For now, we assume that dynamic fields and
8046 variants occupy whole numbers of bytes. However, they need not be
8050 ada_template_to_fixed_record_type_1 (struct type
*type
,
8051 const gdb_byte
*valaddr
,
8052 CORE_ADDR address
, struct value
*dval0
,
8053 int keep_dynamic_fields
)
8055 struct value
*mark
= value_mark ();
8058 int nfields
, bit_len
;
8064 /* Compute the number of fields in this record type that are going
8065 to be processed: unless keep_dynamic_fields, this includes only
8066 fields whose position and length are static will be processed. */
8067 if (keep_dynamic_fields
)
8068 nfields
= TYPE_NFIELDS (type
);
8072 while (nfields
< TYPE_NFIELDS (type
)
8073 && !ada_is_variant_part (type
, nfields
)
8074 && !is_dynamic_field (type
, nfields
))
8078 rtype
= alloc_type_copy (type
);
8079 rtype
->set_code (TYPE_CODE_STRUCT
);
8080 INIT_NONE_SPECIFIC (rtype
);
8081 TYPE_NFIELDS (rtype
) = nfields
;
8082 TYPE_FIELDS (rtype
) = (struct field
*)
8083 TYPE_ALLOC (rtype
, nfields
* sizeof (struct field
));
8084 memset (TYPE_FIELDS (rtype
), 0, sizeof (struct field
) * nfields
);
8085 rtype
->set_name (ada_type_name (type
));
8086 TYPE_FIXED_INSTANCE (rtype
) = 1;
8092 for (f
= 0; f
< nfields
; f
+= 1)
8094 off
= align_up (off
, field_alignment (type
, f
))
8095 + TYPE_FIELD_BITPOS (type
, f
);
8096 SET_FIELD_BITPOS (TYPE_FIELD (rtype
, f
), off
);
8097 TYPE_FIELD_BITSIZE (rtype
, f
) = 0;
8099 if (ada_is_variant_part (type
, f
))
8104 else if (is_dynamic_field (type
, f
))
8106 const gdb_byte
*field_valaddr
= valaddr
;
8107 CORE_ADDR field_address
= address
;
8108 struct type
*field_type
=
8109 TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, f
));
8113 /* rtype's length is computed based on the run-time
8114 value of discriminants. If the discriminants are not
8115 initialized, the type size may be completely bogus and
8116 GDB may fail to allocate a value for it. So check the
8117 size first before creating the value. */
8118 ada_ensure_varsize_limit (rtype
);
8119 /* Using plain value_from_contents_and_address here
8120 causes problems because we will end up trying to
8121 resolve a type that is currently being
8123 dval
= value_from_contents_and_address_unresolved (rtype
,
8126 rtype
= value_type (dval
);
8131 /* If the type referenced by this field is an aligner type, we need
8132 to unwrap that aligner type, because its size might not be set.
8133 Keeping the aligner type would cause us to compute the wrong
8134 size for this field, impacting the offset of the all the fields
8135 that follow this one. */
8136 if (ada_is_aligner_type (field_type
))
8138 long field_offset
= TYPE_FIELD_BITPOS (field_type
, f
);
8140 field_valaddr
= cond_offset_host (field_valaddr
, field_offset
);
8141 field_address
= cond_offset_target (field_address
, field_offset
);
8142 field_type
= ada_aligned_type (field_type
);
8145 field_valaddr
= cond_offset_host (field_valaddr
,
8146 off
/ TARGET_CHAR_BIT
);
8147 field_address
= cond_offset_target (field_address
,
8148 off
/ TARGET_CHAR_BIT
);
8150 /* Get the fixed type of the field. Note that, in this case,
8151 we do not want to get the real type out of the tag: if
8152 the current field is the parent part of a tagged record,
8153 we will get the tag of the object. Clearly wrong: the real
8154 type of the parent is not the real type of the child. We
8155 would end up in an infinite loop. */
8156 field_type
= ada_get_base_type (field_type
);
8157 field_type
= ada_to_fixed_type (field_type
, field_valaddr
,
8158 field_address
, dval
, 0);
8159 /* If the field size is already larger than the maximum
8160 object size, then the record itself will necessarily
8161 be larger than the maximum object size. We need to make
8162 this check now, because the size might be so ridiculously
8163 large (due to an uninitialized variable in the inferior)
8164 that it would cause an overflow when adding it to the
8166 ada_ensure_varsize_limit (field_type
);
8168 TYPE_FIELD_TYPE (rtype
, f
) = field_type
;
8169 TYPE_FIELD_NAME (rtype
, f
) = TYPE_FIELD_NAME (type
, f
);
8170 /* The multiplication can potentially overflow. But because
8171 the field length has been size-checked just above, and
8172 assuming that the maximum size is a reasonable value,
8173 an overflow should not happen in practice. So rather than
8174 adding overflow recovery code to this already complex code,
8175 we just assume that it's not going to happen. */
8177 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype
, f
)) * TARGET_CHAR_BIT
;
8181 /* Note: If this field's type is a typedef, it is important
8182 to preserve the typedef layer.
8184 Otherwise, we might be transforming a typedef to a fat
8185 pointer (encoding a pointer to an unconstrained array),
8186 into a basic fat pointer (encoding an unconstrained
8187 array). As both types are implemented using the same
8188 structure, the typedef is the only clue which allows us
8189 to distinguish between the two options. Stripping it
8190 would prevent us from printing this field appropriately. */
8191 TYPE_FIELD_TYPE (rtype
, f
) = TYPE_FIELD_TYPE (type
, f
);
8192 TYPE_FIELD_NAME (rtype
, f
) = TYPE_FIELD_NAME (type
, f
);
8193 if (TYPE_FIELD_BITSIZE (type
, f
) > 0)
8195 TYPE_FIELD_BITSIZE (rtype
, f
) = TYPE_FIELD_BITSIZE (type
, f
);
8198 struct type
*field_type
= TYPE_FIELD_TYPE (type
, f
);
8200 /* We need to be careful of typedefs when computing
8201 the length of our field. If this is a typedef,
8202 get the length of the target type, not the length
8204 if (field_type
->code () == TYPE_CODE_TYPEDEF
)
8205 field_type
= ada_typedef_target_type (field_type
);
8208 TYPE_LENGTH (ada_check_typedef (field_type
)) * TARGET_CHAR_BIT
;
8211 if (off
+ fld_bit_len
> bit_len
)
8212 bit_len
= off
+ fld_bit_len
;
8214 TYPE_LENGTH (rtype
) =
8215 align_up (bit_len
, TARGET_CHAR_BIT
) / TARGET_CHAR_BIT
;
8218 /* We handle the variant part, if any, at the end because of certain
8219 odd cases in which it is re-ordered so as NOT to be the last field of
8220 the record. This can happen in the presence of representation
8222 if (variant_field
>= 0)
8224 struct type
*branch_type
;
8226 off
= TYPE_FIELD_BITPOS (rtype
, variant_field
);
8230 /* Using plain value_from_contents_and_address here causes
8231 problems because we will end up trying to resolve a type
8232 that is currently being constructed. */
8233 dval
= value_from_contents_and_address_unresolved (rtype
, valaddr
,
8235 rtype
= value_type (dval
);
8241 to_fixed_variant_branch_type
8242 (TYPE_FIELD_TYPE (type
, variant_field
),
8243 cond_offset_host (valaddr
, off
/ TARGET_CHAR_BIT
),
8244 cond_offset_target (address
, off
/ TARGET_CHAR_BIT
), dval
);
8245 if (branch_type
== NULL
)
8247 for (f
= variant_field
+ 1; f
< TYPE_NFIELDS (rtype
); f
+= 1)
8248 TYPE_FIELDS (rtype
)[f
- 1] = TYPE_FIELDS (rtype
)[f
];
8249 TYPE_NFIELDS (rtype
) -= 1;
8253 TYPE_FIELD_TYPE (rtype
, variant_field
) = branch_type
;
8254 TYPE_FIELD_NAME (rtype
, variant_field
) = "S";
8256 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype
, variant_field
)) *
8258 if (off
+ fld_bit_len
> bit_len
)
8259 bit_len
= off
+ fld_bit_len
;
8260 TYPE_LENGTH (rtype
) =
8261 align_up (bit_len
, TARGET_CHAR_BIT
) / TARGET_CHAR_BIT
;
8265 /* According to exp_dbug.ads, the size of TYPE for variable-size records
8266 should contain the alignment of that record, which should be a strictly
8267 positive value. If null or negative, then something is wrong, most
8268 probably in the debug info. In that case, we don't round up the size
8269 of the resulting type. If this record is not part of another structure,
8270 the current RTYPE length might be good enough for our purposes. */
8271 if (TYPE_LENGTH (type
) <= 0)
8274 warning (_("Invalid type size for `%s' detected: %s."),
8275 rtype
->name (), pulongest (TYPE_LENGTH (type
)));
8277 warning (_("Invalid type size for <unnamed> detected: %s."),
8278 pulongest (TYPE_LENGTH (type
)));
8282 TYPE_LENGTH (rtype
) = align_up (TYPE_LENGTH (rtype
),
8283 TYPE_LENGTH (type
));
8286 value_free_to_mark (mark
);
8287 if (TYPE_LENGTH (rtype
) > varsize_limit
)
8288 error (_("record type with dynamic size is larger than varsize-limit"));
8292 /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS
8295 static struct type
*
8296 template_to_fixed_record_type (struct type
*type
, const gdb_byte
*valaddr
,
8297 CORE_ADDR address
, struct value
*dval0
)
8299 return ada_template_to_fixed_record_type_1 (type
, valaddr
,
8303 /* An ordinary record type in which ___XVL-convention fields and
8304 ___XVU- and ___XVN-convention field types in TYPE0 are replaced with
8305 static approximations, containing all possible fields. Uses
8306 no runtime values. Useless for use in values, but that's OK,
8307 since the results are used only for type determinations. Works on both
8308 structs and unions. Representation note: to save space, we memorize
8309 the result of this function in the TYPE_TARGET_TYPE of the
8312 static struct type
*
8313 template_to_static_fixed_type (struct type
*type0
)
8319 /* No need no do anything if the input type is already fixed. */
8320 if (TYPE_FIXED_INSTANCE (type0
))
8323 /* Likewise if we already have computed the static approximation. */
8324 if (TYPE_TARGET_TYPE (type0
) != NULL
)
8325 return TYPE_TARGET_TYPE (type0
);
8327 /* Don't clone TYPE0 until we are sure we are going to need a copy. */
8329 nfields
= TYPE_NFIELDS (type0
);
8331 /* Whether or not we cloned TYPE0, cache the result so that we don't do
8332 recompute all over next time. */
8333 TYPE_TARGET_TYPE (type0
) = type
;
8335 for (f
= 0; f
< nfields
; f
+= 1)
8337 struct type
*field_type
= TYPE_FIELD_TYPE (type0
, f
);
8338 struct type
*new_type
;
8340 if (is_dynamic_field (type0
, f
))
8342 field_type
= ada_check_typedef (field_type
);
8343 new_type
= to_static_fixed_type (TYPE_TARGET_TYPE (field_type
));
8346 new_type
= static_unwrap_type (field_type
);
8348 if (new_type
!= field_type
)
8350 /* Clone TYPE0 only the first time we get a new field type. */
8353 TYPE_TARGET_TYPE (type0
) = type
= alloc_type_copy (type0
);
8354 type
->set_code (type0
->code ());
8355 INIT_NONE_SPECIFIC (type
);
8356 TYPE_NFIELDS (type
) = nfields
;
8357 TYPE_FIELDS (type
) = (struct field
*)
8358 TYPE_ALLOC (type
, nfields
* sizeof (struct field
));
8359 memcpy (TYPE_FIELDS (type
), TYPE_FIELDS (type0
),
8360 sizeof (struct field
) * nfields
);
8361 type
->set_name (ada_type_name (type0
));
8362 TYPE_FIXED_INSTANCE (type
) = 1;
8363 TYPE_LENGTH (type
) = 0;
8365 TYPE_FIELD_TYPE (type
, f
) = new_type
;
8366 TYPE_FIELD_NAME (type
, f
) = TYPE_FIELD_NAME (type0
, f
);
8373 /* Given an object of type TYPE whose contents are at VALADDR and
8374 whose address in memory is ADDRESS, returns a revision of TYPE,
8375 which should be a non-dynamic-sized record, in which the variant
8376 part, if any, is replaced with the appropriate branch. Looks
8377 for discriminant values in DVAL0, which can be NULL if the record
8378 contains the necessary discriminant values. */
8380 static struct type
*
8381 to_record_with_fixed_variant_part (struct type
*type
, const gdb_byte
*valaddr
,
8382 CORE_ADDR address
, struct value
*dval0
)
8384 struct value
*mark
= value_mark ();
8387 struct type
*branch_type
;
8388 int nfields
= TYPE_NFIELDS (type
);
8389 int variant_field
= variant_field_index (type
);
8391 if (variant_field
== -1)
8396 dval
= value_from_contents_and_address (type
, valaddr
, address
);
8397 type
= value_type (dval
);
8402 rtype
= alloc_type_copy (type
);
8403 rtype
->set_code (TYPE_CODE_STRUCT
);
8404 INIT_NONE_SPECIFIC (rtype
);
8405 TYPE_NFIELDS (rtype
) = nfields
;
8406 TYPE_FIELDS (rtype
) =
8407 (struct field
*) TYPE_ALLOC (rtype
, nfields
* sizeof (struct field
));
8408 memcpy (TYPE_FIELDS (rtype
), TYPE_FIELDS (type
),
8409 sizeof (struct field
) * nfields
);
8410 rtype
->set_name (ada_type_name (type
));
8411 TYPE_FIXED_INSTANCE (rtype
) = 1;
8412 TYPE_LENGTH (rtype
) = TYPE_LENGTH (type
);
8414 branch_type
= to_fixed_variant_branch_type
8415 (TYPE_FIELD_TYPE (type
, variant_field
),
8416 cond_offset_host (valaddr
,
8417 TYPE_FIELD_BITPOS (type
, variant_field
)
8419 cond_offset_target (address
,
8420 TYPE_FIELD_BITPOS (type
, variant_field
)
8421 / TARGET_CHAR_BIT
), dval
);
8422 if (branch_type
== NULL
)
8426 for (f
= variant_field
+ 1; f
< nfields
; f
+= 1)
8427 TYPE_FIELDS (rtype
)[f
- 1] = TYPE_FIELDS (rtype
)[f
];
8428 TYPE_NFIELDS (rtype
) -= 1;
8432 TYPE_FIELD_TYPE (rtype
, variant_field
) = branch_type
;
8433 TYPE_FIELD_NAME (rtype
, variant_field
) = "S";
8434 TYPE_FIELD_BITSIZE (rtype
, variant_field
) = 0;
8435 TYPE_LENGTH (rtype
) += TYPE_LENGTH (branch_type
);
8437 TYPE_LENGTH (rtype
) -= TYPE_LENGTH (TYPE_FIELD_TYPE (type
, variant_field
));
8439 value_free_to_mark (mark
);
8443 /* An ordinary record type (with fixed-length fields) that describes
8444 the value at (TYPE0, VALADDR, ADDRESS) [see explanation at
8445 beginning of this section]. Any necessary discriminants' values
8446 should be in DVAL, a record value; it may be NULL if the object
8447 at ADDR itself contains any necessary discriminant values.
8448 Additionally, VALADDR and ADDRESS may also be NULL if no discriminant
8449 values from the record are needed. Except in the case that DVAL,
8450 VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless
8451 unchecked) is replaced by a particular branch of the variant.
8453 NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0
8454 is questionable and may be removed. It can arise during the
8455 processing of an unconstrained-array-of-record type where all the
8456 variant branches have exactly the same size. This is because in
8457 such cases, the compiler does not bother to use the XVS convention
8458 when encoding the record. I am currently dubious of this
8459 shortcut and suspect the compiler should be altered. FIXME. */
8461 static struct type
*
8462 to_fixed_record_type (struct type
*type0
, const gdb_byte
*valaddr
,
8463 CORE_ADDR address
, struct value
*dval
)
8465 struct type
*templ_type
;
8467 if (TYPE_FIXED_INSTANCE (type0
))
8470 templ_type
= dynamic_template_type (type0
);
8472 if (templ_type
!= NULL
)
8473 return template_to_fixed_record_type (templ_type
, valaddr
, address
, dval
);
8474 else if (variant_field_index (type0
) >= 0)
8476 if (dval
== NULL
&& valaddr
== NULL
&& address
== 0)
8478 return to_record_with_fixed_variant_part (type0
, valaddr
, address
,
8483 TYPE_FIXED_INSTANCE (type0
) = 1;
8489 /* An ordinary record type (with fixed-length fields) that describes
8490 the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a
8491 union type. Any necessary discriminants' values should be in DVAL,
8492 a record value. That is, this routine selects the appropriate
8493 branch of the union at ADDR according to the discriminant value
8494 indicated in the union's type name. Returns VAR_TYPE0 itself if
8495 it represents a variant subject to a pragma Unchecked_Union. */
8497 static struct type
*
8498 to_fixed_variant_branch_type (struct type
*var_type0
, const gdb_byte
*valaddr
,
8499 CORE_ADDR address
, struct value
*dval
)
8502 struct type
*templ_type
;
8503 struct type
*var_type
;
8505 if (var_type0
->code () == TYPE_CODE_PTR
)
8506 var_type
= TYPE_TARGET_TYPE (var_type0
);
8508 var_type
= var_type0
;
8510 templ_type
= ada_find_parallel_type (var_type
, "___XVU");
8512 if (templ_type
!= NULL
)
8513 var_type
= templ_type
;
8515 if (is_unchecked_variant (var_type
, value_type (dval
)))
8517 which
= ada_which_variant_applies (var_type
, dval
);
8520 return empty_record (var_type
);
8521 else if (is_dynamic_field (var_type
, which
))
8522 return to_fixed_record_type
8523 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (var_type
, which
)),
8524 valaddr
, address
, dval
);
8525 else if (variant_field_index (TYPE_FIELD_TYPE (var_type
, which
)) >= 0)
8527 to_fixed_record_type
8528 (TYPE_FIELD_TYPE (var_type
, which
), valaddr
, address
, dval
);
8530 return TYPE_FIELD_TYPE (var_type
, which
);
8533 /* Assuming RANGE_TYPE is a TYPE_CODE_RANGE, return nonzero if
8534 ENCODING_TYPE, a type following the GNAT conventions for discrete
8535 type encodings, only carries redundant information. */
8538 ada_is_redundant_range_encoding (struct type
*range_type
,
8539 struct type
*encoding_type
)
8541 const char *bounds_str
;
8545 gdb_assert (range_type
->code () == TYPE_CODE_RANGE
);
8547 if (get_base_type (range_type
)->code ()
8548 != get_base_type (encoding_type
)->code ())
8550 /* The compiler probably used a simple base type to describe
8551 the range type instead of the range's actual base type,
8552 expecting us to get the real base type from the encoding
8553 anyway. In this situation, the encoding cannot be ignored
8558 if (is_dynamic_type (range_type
))
8561 if (encoding_type
->name () == NULL
)
8564 bounds_str
= strstr (encoding_type
->name (), "___XDLU_");
8565 if (bounds_str
== NULL
)
8568 n
= 8; /* Skip "___XDLU_". */
8569 if (!ada_scan_number (bounds_str
, n
, &lo
, &n
))
8571 if (TYPE_LOW_BOUND (range_type
) != lo
)
8574 n
+= 2; /* Skip the "__" separator between the two bounds. */
8575 if (!ada_scan_number (bounds_str
, n
, &hi
, &n
))
8577 if (TYPE_HIGH_BOUND (range_type
) != hi
)
8583 /* Given the array type ARRAY_TYPE, return nonzero if DESC_TYPE,
8584 a type following the GNAT encoding for describing array type
8585 indices, only carries redundant information. */
8588 ada_is_redundant_index_type_desc (struct type
*array_type
,
8589 struct type
*desc_type
)
8591 struct type
*this_layer
= check_typedef (array_type
);
8594 for (i
= 0; i
< TYPE_NFIELDS (desc_type
); i
++)
8596 if (!ada_is_redundant_range_encoding (TYPE_INDEX_TYPE (this_layer
),
8597 TYPE_FIELD_TYPE (desc_type
, i
)))
8599 this_layer
= check_typedef (TYPE_TARGET_TYPE (this_layer
));
8605 /* Assuming that TYPE0 is an array type describing the type of a value
8606 at ADDR, and that DVAL describes a record containing any
8607 discriminants used in TYPE0, returns a type for the value that
8608 contains no dynamic components (that is, no components whose sizes
8609 are determined by run-time quantities). Unless IGNORE_TOO_BIG is
8610 true, gives an error message if the resulting type's size is over
8613 static struct type
*
8614 to_fixed_array_type (struct type
*type0
, struct value
*dval
,
8617 struct type
*index_type_desc
;
8618 struct type
*result
;
8619 int constrained_packed_array_p
;
8620 static const char *xa_suffix
= "___XA";
8622 type0
= ada_check_typedef (type0
);
8623 if (TYPE_FIXED_INSTANCE (type0
))
8626 constrained_packed_array_p
= ada_is_constrained_packed_array_type (type0
);
8627 if (constrained_packed_array_p
)
8628 type0
= decode_constrained_packed_array_type (type0
);
8630 index_type_desc
= ada_find_parallel_type (type0
, xa_suffix
);
8632 /* As mentioned in exp_dbug.ads, for non bit-packed arrays an
8633 encoding suffixed with 'P' may still be generated. If so,
8634 it should be used to find the XA type. */
8636 if (index_type_desc
== NULL
)
8638 const char *type_name
= ada_type_name (type0
);
8640 if (type_name
!= NULL
)
8642 const int len
= strlen (type_name
);
8643 char *name
= (char *) alloca (len
+ strlen (xa_suffix
));
8645 if (type_name
[len
- 1] == 'P')
8647 strcpy (name
, type_name
);
8648 strcpy (name
+ len
- 1, xa_suffix
);
8649 index_type_desc
= ada_find_parallel_type_with_name (type0
, name
);
8654 ada_fixup_array_indexes_type (index_type_desc
);
8655 if (index_type_desc
!= NULL
8656 && ada_is_redundant_index_type_desc (type0
, index_type_desc
))
8658 /* Ignore this ___XA parallel type, as it does not bring any
8659 useful information. This allows us to avoid creating fixed
8660 versions of the array's index types, which would be identical
8661 to the original ones. This, in turn, can also help avoid
8662 the creation of fixed versions of the array itself. */
8663 index_type_desc
= NULL
;
8666 if (index_type_desc
== NULL
)
8668 struct type
*elt_type0
= ada_check_typedef (TYPE_TARGET_TYPE (type0
));
8670 /* NOTE: elt_type---the fixed version of elt_type0---should never
8671 depend on the contents of the array in properly constructed
8673 /* Create a fixed version of the array element type.
8674 We're not providing the address of an element here,
8675 and thus the actual object value cannot be inspected to do
8676 the conversion. This should not be a problem, since arrays of
8677 unconstrained objects are not allowed. In particular, all
8678 the elements of an array of a tagged type should all be of
8679 the same type specified in the debugging info. No need to
8680 consult the object tag. */
8681 struct type
*elt_type
= ada_to_fixed_type (elt_type0
, 0, 0, dval
, 1);
8683 /* Make sure we always create a new array type when dealing with
8684 packed array types, since we're going to fix-up the array
8685 type length and element bitsize a little further down. */
8686 if (elt_type0
== elt_type
&& !constrained_packed_array_p
)
8689 result
= create_array_type (alloc_type_copy (type0
),
8690 elt_type
, TYPE_INDEX_TYPE (type0
));
8695 struct type
*elt_type0
;
8698 for (i
= TYPE_NFIELDS (index_type_desc
); i
> 0; i
-= 1)
8699 elt_type0
= TYPE_TARGET_TYPE (elt_type0
);
8701 /* NOTE: result---the fixed version of elt_type0---should never
8702 depend on the contents of the array in properly constructed
8704 /* Create a fixed version of the array element type.
8705 We're not providing the address of an element here,
8706 and thus the actual object value cannot be inspected to do
8707 the conversion. This should not be a problem, since arrays of
8708 unconstrained objects are not allowed. In particular, all
8709 the elements of an array of a tagged type should all be of
8710 the same type specified in the debugging info. No need to
8711 consult the object tag. */
8713 ada_to_fixed_type (ada_check_typedef (elt_type0
), 0, 0, dval
, 1);
8716 for (i
= TYPE_NFIELDS (index_type_desc
) - 1; i
>= 0; i
-= 1)
8718 struct type
*range_type
=
8719 to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc
, i
), dval
);
8721 result
= create_array_type (alloc_type_copy (elt_type0
),
8722 result
, range_type
);
8723 elt_type0
= TYPE_TARGET_TYPE (elt_type0
);
8725 if (!ignore_too_big
&& TYPE_LENGTH (result
) > varsize_limit
)
8726 error (_("array type with dynamic size is larger than varsize-limit"));
8729 /* We want to preserve the type name. This can be useful when
8730 trying to get the type name of a value that has already been
8731 printed (for instance, if the user did "print VAR; whatis $". */
8732 result
->set_name (type0
->name ());
8734 if (constrained_packed_array_p
)
8736 /* So far, the resulting type has been created as if the original
8737 type was a regular (non-packed) array type. As a result, the
8738 bitsize of the array elements needs to be set again, and the array
8739 length needs to be recomputed based on that bitsize. */
8740 int len
= TYPE_LENGTH (result
) / TYPE_LENGTH (TYPE_TARGET_TYPE (result
));
8741 int elt_bitsize
= TYPE_FIELD_BITSIZE (type0
, 0);
8743 TYPE_FIELD_BITSIZE (result
, 0) = TYPE_FIELD_BITSIZE (type0
, 0);
8744 TYPE_LENGTH (result
) = len
* elt_bitsize
/ HOST_CHAR_BIT
;
8745 if (TYPE_LENGTH (result
) * HOST_CHAR_BIT
< len
* elt_bitsize
)
8746 TYPE_LENGTH (result
)++;
8749 TYPE_FIXED_INSTANCE (result
) = 1;
8754 /* A standard type (containing no dynamically sized components)
8755 corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS)
8756 DVAL describes a record containing any discriminants used in TYPE0,
8757 and may be NULL if there are none, or if the object of type TYPE at
8758 ADDRESS or in VALADDR contains these discriminants.
8760 If CHECK_TAG is not null, in the case of tagged types, this function
8761 attempts to locate the object's tag and use it to compute the actual
8762 type. However, when ADDRESS is null, we cannot use it to determine the
8763 location of the tag, and therefore compute the tagged type's actual type.
8764 So we return the tagged type without consulting the tag. */
8766 static struct type
*
8767 ada_to_fixed_type_1 (struct type
*type
, const gdb_byte
*valaddr
,
8768 CORE_ADDR address
, struct value
*dval
, int check_tag
)
8770 type
= ada_check_typedef (type
);
8772 /* Only un-fixed types need to be handled here. */
8773 if (!HAVE_GNAT_AUX_INFO (type
))
8776 switch (type
->code ())
8780 case TYPE_CODE_STRUCT
:
8782 struct type
*static_type
= to_static_fixed_type (type
);
8783 struct type
*fixed_record_type
=
8784 to_fixed_record_type (type
, valaddr
, address
, NULL
);
8786 /* If STATIC_TYPE is a tagged type and we know the object's address,
8787 then we can determine its tag, and compute the object's actual
8788 type from there. Note that we have to use the fixed record
8789 type (the parent part of the record may have dynamic fields
8790 and the way the location of _tag is expressed may depend on
8793 if (check_tag
&& address
!= 0 && ada_is_tagged_type (static_type
, 0))
8796 value_tag_from_contents_and_address
8800 struct type
*real_type
= type_from_tag (tag
);
8802 value_from_contents_and_address (fixed_record_type
,
8805 fixed_record_type
= value_type (obj
);
8806 if (real_type
!= NULL
)
8807 return to_fixed_record_type
8809 value_address (ada_tag_value_at_base_address (obj
)), NULL
);
8812 /* Check to see if there is a parallel ___XVZ variable.
8813 If there is, then it provides the actual size of our type. */
8814 else if (ada_type_name (fixed_record_type
) != NULL
)
8816 const char *name
= ada_type_name (fixed_record_type
);
8818 = (char *) alloca (strlen (name
) + 7 /* "___XVZ\0" */);
8819 bool xvz_found
= false;
8822 xsnprintf (xvz_name
, strlen (name
) + 7, "%s___XVZ", name
);
8825 xvz_found
= get_int_var_value (xvz_name
, size
);
8827 catch (const gdb_exception_error
&except
)
8829 /* We found the variable, but somehow failed to read
8830 its value. Rethrow the same error, but with a little
8831 bit more information, to help the user understand
8832 what went wrong (Eg: the variable might have been
8834 throw_error (except
.error
,
8835 _("unable to read value of %s (%s)"),
8836 xvz_name
, except
.what ());
8839 if (xvz_found
&& TYPE_LENGTH (fixed_record_type
) != size
)
8841 fixed_record_type
= copy_type (fixed_record_type
);
8842 TYPE_LENGTH (fixed_record_type
) = size
;
8844 /* The FIXED_RECORD_TYPE may have be a stub. We have
8845 observed this when the debugging info is STABS, and
8846 apparently it is something that is hard to fix.
8848 In practice, we don't need the actual type definition
8849 at all, because the presence of the XVZ variable allows us
8850 to assume that there must be a XVS type as well, which we
8851 should be able to use later, when we need the actual type
8854 In the meantime, pretend that the "fixed" type we are
8855 returning is NOT a stub, because this can cause trouble
8856 when using this type to create new types targeting it.
8857 Indeed, the associated creation routines often check
8858 whether the target type is a stub and will try to replace
8859 it, thus using a type with the wrong size. This, in turn,
8860 might cause the new type to have the wrong size too.
8861 Consider the case of an array, for instance, where the size
8862 of the array is computed from the number of elements in
8863 our array multiplied by the size of its element. */
8864 TYPE_STUB (fixed_record_type
) = 0;
8867 return fixed_record_type
;
8869 case TYPE_CODE_ARRAY
:
8870 return to_fixed_array_type (type
, dval
, 1);
8871 case TYPE_CODE_UNION
:
8875 return to_fixed_variant_branch_type (type
, valaddr
, address
, dval
);
8879 /* The same as ada_to_fixed_type_1, except that it preserves the type
8880 if it is a TYPE_CODE_TYPEDEF of a type that is already fixed.
8882 The typedef layer needs be preserved in order to differentiate between
8883 arrays and array pointers when both types are implemented using the same
8884 fat pointer. In the array pointer case, the pointer is encoded as
8885 a typedef of the pointer type. For instance, considering:
8887 type String_Access is access String;
8888 S1 : String_Access := null;
8890 To the debugger, S1 is defined as a typedef of type String. But
8891 to the user, it is a pointer. So if the user tries to print S1,
8892 we should not dereference the array, but print the array address
8895 If we didn't preserve the typedef layer, we would lose the fact that
8896 the type is to be presented as a pointer (needs de-reference before
8897 being printed). And we would also use the source-level type name. */
8900 ada_to_fixed_type (struct type
*type
, const gdb_byte
*valaddr
,
8901 CORE_ADDR address
, struct value
*dval
, int check_tag
)
8904 struct type
*fixed_type
=
8905 ada_to_fixed_type_1 (type
, valaddr
, address
, dval
, check_tag
);
8907 /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE,
8908 then preserve the typedef layer.
8910 Implementation note: We can only check the main-type portion of
8911 the TYPE and FIXED_TYPE, because eliminating the typedef layer
8912 from TYPE now returns a type that has the same instance flags
8913 as TYPE. For instance, if TYPE is a "typedef const", and its
8914 target type is a "struct", then the typedef elimination will return
8915 a "const" version of the target type. See check_typedef for more
8916 details about how the typedef layer elimination is done.
8918 brobecker/2010-11-19: It seems to me that the only case where it is
8919 useful to preserve the typedef layer is when dealing with fat pointers.
8920 Perhaps, we could add a check for that and preserve the typedef layer
8921 only in that situation. But this seems unnecessary so far, probably
8922 because we call check_typedef/ada_check_typedef pretty much everywhere.
8924 if (type
->code () == TYPE_CODE_TYPEDEF
8925 && (TYPE_MAIN_TYPE (ada_typedef_target_type (type
))
8926 == TYPE_MAIN_TYPE (fixed_type
)))
8932 /* A standard (static-sized) type corresponding as well as possible to
8933 TYPE0, but based on no runtime data. */
8935 static struct type
*
8936 to_static_fixed_type (struct type
*type0
)
8943 if (TYPE_FIXED_INSTANCE (type0
))
8946 type0
= ada_check_typedef (type0
);
8948 switch (type0
->code ())
8952 case TYPE_CODE_STRUCT
:
8953 type
= dynamic_template_type (type0
);
8955 return template_to_static_fixed_type (type
);
8957 return template_to_static_fixed_type (type0
);
8958 case TYPE_CODE_UNION
:
8959 type
= ada_find_parallel_type (type0
, "___XVU");
8961 return template_to_static_fixed_type (type
);
8963 return template_to_static_fixed_type (type0
);
8967 /* A static approximation of TYPE with all type wrappers removed. */
8969 static struct type
*
8970 static_unwrap_type (struct type
*type
)
8972 if (ada_is_aligner_type (type
))
8974 struct type
*type1
= TYPE_FIELD_TYPE (ada_check_typedef (type
), 0);
8975 if (ada_type_name (type1
) == NULL
)
8976 type1
->set_name (ada_type_name (type
));
8978 return static_unwrap_type (type1
);
8982 struct type
*raw_real_type
= ada_get_base_type (type
);
8984 if (raw_real_type
== type
)
8987 return to_static_fixed_type (raw_real_type
);
8991 /* In some cases, incomplete and private types require
8992 cross-references that are not resolved as records (for example,
8994 type FooP is access Foo;
8996 type Foo is array ...;
8997 ). In these cases, since there is no mechanism for producing
8998 cross-references to such types, we instead substitute for FooP a
8999 stub enumeration type that is nowhere resolved, and whose tag is
9000 the name of the actual type. Call these types "non-record stubs". */
9002 /* A type equivalent to TYPE that is not a non-record stub, if one
9003 exists, otherwise TYPE. */
9006 ada_check_typedef (struct type
*type
)
9011 /* If our type is an access to an unconstrained array, which is encoded
9012 as a TYPE_CODE_TYPEDEF of a fat pointer, then we're done.
9013 We don't want to strip the TYPE_CODE_TYPDEF layer, because this is
9014 what allows us to distinguish between fat pointers that represent
9015 array types, and fat pointers that represent array access types
9016 (in both cases, the compiler implements them as fat pointers). */
9017 if (ada_is_access_to_unconstrained_array (type
))
9020 type
= check_typedef (type
);
9021 if (type
== NULL
|| type
->code () != TYPE_CODE_ENUM
9022 || !TYPE_STUB (type
)
9023 || type
->name () == NULL
)
9027 const char *name
= type
->name ();
9028 struct type
*type1
= ada_find_any_type (name
);
9033 /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with
9034 stubs pointing to arrays, as we don't create symbols for array
9035 types, only for the typedef-to-array types). If that's the case,
9036 strip the typedef layer. */
9037 if (type1
->code () == TYPE_CODE_TYPEDEF
)
9038 type1
= ada_check_typedef (type1
);
9044 /* A value representing the data at VALADDR/ADDRESS as described by
9045 type TYPE0, but with a standard (static-sized) type that correctly
9046 describes it. If VAL0 is not NULL and TYPE0 already is a standard
9047 type, then return VAL0 [this feature is simply to avoid redundant
9048 creation of struct values]. */
9050 static struct value
*
9051 ada_to_fixed_value_create (struct type
*type0
, CORE_ADDR address
,
9054 struct type
*type
= ada_to_fixed_type (type0
, 0, address
, NULL
, 1);
9056 if (type
== type0
&& val0
!= NULL
)
9059 if (VALUE_LVAL (val0
) != lval_memory
)
9061 /* Our value does not live in memory; it could be a convenience
9062 variable, for instance. Create a not_lval value using val0's
9064 return value_from_contents (type
, value_contents (val0
));
9067 return value_from_contents_and_address (type
, 0, address
);
9070 /* A value representing VAL, but with a standard (static-sized) type
9071 that correctly describes it. Does not necessarily create a new
9075 ada_to_fixed_value (struct value
*val
)
9077 val
= unwrap_value (val
);
9078 val
= ada_to_fixed_value_create (value_type (val
), value_address (val
), val
);
9085 /* Table mapping attribute numbers to names.
9086 NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */
9088 static const char *attribute_names
[] = {
9106 ada_attribute_name (enum exp_opcode n
)
9108 if (n
>= OP_ATR_FIRST
&& n
<= (int) OP_ATR_VAL
)
9109 return attribute_names
[n
- OP_ATR_FIRST
+ 1];
9111 return attribute_names
[0];
9114 /* Evaluate the 'POS attribute applied to ARG. */
9117 pos_atr (struct value
*arg
)
9119 struct value
*val
= coerce_ref (arg
);
9120 struct type
*type
= value_type (val
);
9123 if (!discrete_type_p (type
))
9124 error (_("'POS only defined on discrete types"));
9126 if (!discrete_position (type
, value_as_long (val
), &result
))
9127 error (_("enumeration value is invalid: can't find 'POS"));
9132 static struct value
*
9133 value_pos_atr (struct type
*type
, struct value
*arg
)
9135 return value_from_longest (type
, pos_atr (arg
));
9138 /* Evaluate the TYPE'VAL attribute applied to ARG. */
9140 static struct value
*
9141 value_val_atr (struct type
*type
, struct value
*arg
)
9143 if (!discrete_type_p (type
))
9144 error (_("'VAL only defined on discrete types"));
9145 if (!integer_type_p (value_type (arg
)))
9146 error (_("'VAL requires integral argument"));
9148 if (type
->code () == TYPE_CODE_ENUM
)
9150 long pos
= value_as_long (arg
);
9152 if (pos
< 0 || pos
>= TYPE_NFIELDS (type
))
9153 error (_("argument to 'VAL out of range"));
9154 return value_from_longest (type
, TYPE_FIELD_ENUMVAL (type
, pos
));
9157 return value_from_longest (type
, value_as_long (arg
));
9163 /* True if TYPE appears to be an Ada character type.
9164 [At the moment, this is true only for Character and Wide_Character;
9165 It is a heuristic test that could stand improvement]. */
9168 ada_is_character_type (struct type
*type
)
9172 /* If the type code says it's a character, then assume it really is,
9173 and don't check any further. */
9174 if (type
->code () == TYPE_CODE_CHAR
)
9177 /* Otherwise, assume it's a character type iff it is a discrete type
9178 with a known character type name. */
9179 name
= ada_type_name (type
);
9180 return (name
!= NULL
9181 && (type
->code () == TYPE_CODE_INT
9182 || type
->code () == TYPE_CODE_RANGE
)
9183 && (strcmp (name
, "character") == 0
9184 || strcmp (name
, "wide_character") == 0
9185 || strcmp (name
, "wide_wide_character") == 0
9186 || strcmp (name
, "unsigned char") == 0));
9189 /* True if TYPE appears to be an Ada string type. */
9192 ada_is_string_type (struct type
*type
)
9194 type
= ada_check_typedef (type
);
9196 && type
->code () != TYPE_CODE_PTR
9197 && (ada_is_simple_array_type (type
)
9198 || ada_is_array_descriptor_type (type
))
9199 && ada_array_arity (type
) == 1)
9201 struct type
*elttype
= ada_array_element_type (type
, 1);
9203 return ada_is_character_type (elttype
);
9209 /* The compiler sometimes provides a parallel XVS type for a given
9210 PAD type. Normally, it is safe to follow the PAD type directly,
9211 but older versions of the compiler have a bug that causes the offset
9212 of its "F" field to be wrong. Following that field in that case
9213 would lead to incorrect results, but this can be worked around
9214 by ignoring the PAD type and using the associated XVS type instead.
9216 Set to True if the debugger should trust the contents of PAD types.
9217 Otherwise, ignore the PAD type if there is a parallel XVS type. */
9218 static bool trust_pad_over_xvs
= true;
9220 /* True if TYPE is a struct type introduced by the compiler to force the
9221 alignment of a value. Such types have a single field with a
9222 distinctive name. */
9225 ada_is_aligner_type (struct type
*type
)
9227 type
= ada_check_typedef (type
);
9229 if (!trust_pad_over_xvs
&& ada_find_parallel_type (type
, "___XVS") != NULL
)
9232 return (type
->code () == TYPE_CODE_STRUCT
9233 && TYPE_NFIELDS (type
) == 1
9234 && strcmp (TYPE_FIELD_NAME (type
, 0), "F") == 0);
9237 /* If there is an ___XVS-convention type parallel to SUBTYPE, return
9238 the parallel type. */
9241 ada_get_base_type (struct type
*raw_type
)
9243 struct type
*real_type_namer
;
9244 struct type
*raw_real_type
;
9246 if (raw_type
== NULL
|| raw_type
->code () != TYPE_CODE_STRUCT
)
9249 if (ada_is_aligner_type (raw_type
))
9250 /* The encoding specifies that we should always use the aligner type.
9251 So, even if this aligner type has an associated XVS type, we should
9254 According to the compiler gurus, an XVS type parallel to an aligner
9255 type may exist because of a stabs limitation. In stabs, aligner
9256 types are empty because the field has a variable-sized type, and
9257 thus cannot actually be used as an aligner type. As a result,
9258 we need the associated parallel XVS type to decode the type.
9259 Since the policy in the compiler is to not change the internal
9260 representation based on the debugging info format, we sometimes
9261 end up having a redundant XVS type parallel to the aligner type. */
9264 real_type_namer
= ada_find_parallel_type (raw_type
, "___XVS");
9265 if (real_type_namer
== NULL
9266 || real_type_namer
->code () != TYPE_CODE_STRUCT
9267 || TYPE_NFIELDS (real_type_namer
) != 1)
9270 if (TYPE_FIELD_TYPE (real_type_namer
, 0)->code () != TYPE_CODE_REF
)
9272 /* This is an older encoding form where the base type needs to be
9273 looked up by name. We prefer the newer encoding because it is
9275 raw_real_type
= ada_find_any_type (TYPE_FIELD_NAME (real_type_namer
, 0));
9276 if (raw_real_type
== NULL
)
9279 return raw_real_type
;
9282 /* The field in our XVS type is a reference to the base type. */
9283 return TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (real_type_namer
, 0));
9286 /* The type of value designated by TYPE, with all aligners removed. */
9289 ada_aligned_type (struct type
*type
)
9291 if (ada_is_aligner_type (type
))
9292 return ada_aligned_type (TYPE_FIELD_TYPE (type
, 0));
9294 return ada_get_base_type (type
);
9298 /* The address of the aligned value in an object at address VALADDR
9299 having type TYPE. Assumes ada_is_aligner_type (TYPE). */
9302 ada_aligned_value_addr (struct type
*type
, const gdb_byte
*valaddr
)
9304 if (ada_is_aligner_type (type
))
9305 return ada_aligned_value_addr (TYPE_FIELD_TYPE (type
, 0),
9307 TYPE_FIELD_BITPOS (type
,
9308 0) / TARGET_CHAR_BIT
);
9315 /* The printed representation of an enumeration literal with encoded
9316 name NAME. The value is good to the next call of ada_enum_name. */
9318 ada_enum_name (const char *name
)
9320 static char *result
;
9321 static size_t result_len
= 0;
9324 /* First, unqualify the enumeration name:
9325 1. Search for the last '.' character. If we find one, then skip
9326 all the preceding characters, the unqualified name starts
9327 right after that dot.
9328 2. Otherwise, we may be debugging on a target where the compiler
9329 translates dots into "__". Search forward for double underscores,
9330 but stop searching when we hit an overloading suffix, which is
9331 of the form "__" followed by digits. */
9333 tmp
= strrchr (name
, '.');
9338 while ((tmp
= strstr (name
, "__")) != NULL
)
9340 if (isdigit (tmp
[2]))
9351 if (name
[1] == 'U' || name
[1] == 'W')
9353 if (sscanf (name
+ 2, "%x", &v
) != 1)
9356 else if (((name
[1] >= '0' && name
[1] <= '9')
9357 || (name
[1] >= 'a' && name
[1] <= 'z'))
9360 GROW_VECT (result
, result_len
, 4);
9361 xsnprintf (result
, result_len
, "'%c'", name
[1]);
9367 GROW_VECT (result
, result_len
, 16);
9368 if (isascii (v
) && isprint (v
))
9369 xsnprintf (result
, result_len
, "'%c'", v
);
9370 else if (name
[1] == 'U')
9371 xsnprintf (result
, result_len
, "[\"%02x\"]", v
);
9373 xsnprintf (result
, result_len
, "[\"%04x\"]", v
);
9379 tmp
= strstr (name
, "__");
9381 tmp
= strstr (name
, "$");
9384 GROW_VECT (result
, result_len
, tmp
- name
+ 1);
9385 strncpy (result
, name
, tmp
- name
);
9386 result
[tmp
- name
] = '\0';
9394 /* Evaluate the subexpression of EXP starting at *POS as for
9395 evaluate_type, updating *POS to point just past the evaluated
9398 static struct value
*
9399 evaluate_subexp_type (struct expression
*exp
, int *pos
)
9401 return evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
9404 /* If VAL is wrapped in an aligner or subtype wrapper, return the
9407 static struct value
*
9408 unwrap_value (struct value
*val
)
9410 struct type
*type
= ada_check_typedef (value_type (val
));
9412 if (ada_is_aligner_type (type
))
9414 struct value
*v
= ada_value_struct_elt (val
, "F", 0);
9415 struct type
*val_type
= ada_check_typedef (value_type (v
));
9417 if (ada_type_name (val_type
) == NULL
)
9418 val_type
->set_name (ada_type_name (type
));
9420 return unwrap_value (v
);
9424 struct type
*raw_real_type
=
9425 ada_check_typedef (ada_get_base_type (type
));
9427 /* If there is no parallel XVS or XVE type, then the value is
9428 already unwrapped. Return it without further modification. */
9429 if ((type
== raw_real_type
)
9430 && ada_find_parallel_type (type
, "___XVE") == NULL
)
9434 coerce_unspec_val_to_type
9435 (val
, ada_to_fixed_type (raw_real_type
, 0,
9436 value_address (val
),
9441 static struct value
*
9442 cast_from_fixed (struct type
*type
, struct value
*arg
)
9444 struct value
*scale
= ada_scaling_factor (value_type (arg
));
9445 arg
= value_cast (value_type (scale
), arg
);
9447 arg
= value_binop (arg
, scale
, BINOP_MUL
);
9448 return value_cast (type
, arg
);
9451 static struct value
*
9452 cast_to_fixed (struct type
*type
, struct value
*arg
)
9454 if (type
== value_type (arg
))
9457 struct value
*scale
= ada_scaling_factor (type
);
9458 if (ada_is_gnat_encoded_fixed_point_type (value_type (arg
)))
9459 arg
= cast_from_fixed (value_type (scale
), arg
);
9461 arg
= value_cast (value_type (scale
), arg
);
9463 arg
= value_binop (arg
, scale
, BINOP_DIV
);
9464 return value_cast (type
, arg
);
9467 /* Given two array types T1 and T2, return nonzero iff both arrays
9468 contain the same number of elements. */
9471 ada_same_array_size_p (struct type
*t1
, struct type
*t2
)
9473 LONGEST lo1
, hi1
, lo2
, hi2
;
9475 /* Get the array bounds in order to verify that the size of
9476 the two arrays match. */
9477 if (!get_array_bounds (t1
, &lo1
, &hi1
)
9478 || !get_array_bounds (t2
, &lo2
, &hi2
))
9479 error (_("unable to determine array bounds"));
9481 /* To make things easier for size comparison, normalize a bit
9482 the case of empty arrays by making sure that the difference
9483 between upper bound and lower bound is always -1. */
9489 return (hi1
- lo1
== hi2
- lo2
);
9492 /* Assuming that VAL is an array of integrals, and TYPE represents
9493 an array with the same number of elements, but with wider integral
9494 elements, return an array "casted" to TYPE. In practice, this
9495 means that the returned array is built by casting each element
9496 of the original array into TYPE's (wider) element type. */
9498 static struct value
*
9499 ada_promote_array_of_integrals (struct type
*type
, struct value
*val
)
9501 struct type
*elt_type
= TYPE_TARGET_TYPE (type
);
9506 /* Verify that both val and type are arrays of scalars, and
9507 that the size of val's elements is smaller than the size
9508 of type's element. */
9509 gdb_assert (type
->code () == TYPE_CODE_ARRAY
);
9510 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (type
)));
9511 gdb_assert (value_type (val
)->code () == TYPE_CODE_ARRAY
);
9512 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (value_type (val
))));
9513 gdb_assert (TYPE_LENGTH (TYPE_TARGET_TYPE (type
))
9514 > TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val
))));
9516 if (!get_array_bounds (type
, &lo
, &hi
))
9517 error (_("unable to determine array bounds"));
9519 res
= allocate_value (type
);
9521 /* Promote each array element. */
9522 for (i
= 0; i
< hi
- lo
+ 1; i
++)
9524 struct value
*elt
= value_cast (elt_type
, value_subscript (val
, lo
+ i
));
9526 memcpy (value_contents_writeable (res
) + (i
* TYPE_LENGTH (elt_type
)),
9527 value_contents_all (elt
), TYPE_LENGTH (elt_type
));
9533 /* Coerce VAL as necessary for assignment to an lval of type TYPE, and
9534 return the converted value. */
9536 static struct value
*
9537 coerce_for_assign (struct type
*type
, struct value
*val
)
9539 struct type
*type2
= value_type (val
);
9544 type2
= ada_check_typedef (type2
);
9545 type
= ada_check_typedef (type
);
9547 if (type2
->code () == TYPE_CODE_PTR
9548 && type
->code () == TYPE_CODE_ARRAY
)
9550 val
= ada_value_ind (val
);
9551 type2
= value_type (val
);
9554 if (type2
->code () == TYPE_CODE_ARRAY
9555 && type
->code () == TYPE_CODE_ARRAY
)
9557 if (!ada_same_array_size_p (type
, type2
))
9558 error (_("cannot assign arrays of different length"));
9560 if (is_integral_type (TYPE_TARGET_TYPE (type
))
9561 && is_integral_type (TYPE_TARGET_TYPE (type2
))
9562 && TYPE_LENGTH (TYPE_TARGET_TYPE (type2
))
9563 < TYPE_LENGTH (TYPE_TARGET_TYPE (type
)))
9565 /* Allow implicit promotion of the array elements to
9567 return ada_promote_array_of_integrals (type
, val
);
9570 if (TYPE_LENGTH (TYPE_TARGET_TYPE (type2
))
9571 != TYPE_LENGTH (TYPE_TARGET_TYPE (type
)))
9572 error (_("Incompatible types in assignment"));
9573 deprecated_set_value_type (val
, type
);
9578 static struct value
*
9579 ada_value_binop (struct value
*arg1
, struct value
*arg2
, enum exp_opcode op
)
9582 struct type
*type1
, *type2
;
9585 arg1
= coerce_ref (arg1
);
9586 arg2
= coerce_ref (arg2
);
9587 type1
= get_base_type (ada_check_typedef (value_type (arg1
)));
9588 type2
= get_base_type (ada_check_typedef (value_type (arg2
)));
9590 if (type1
->code () != TYPE_CODE_INT
9591 || type2
->code () != TYPE_CODE_INT
)
9592 return value_binop (arg1
, arg2
, op
);
9601 return value_binop (arg1
, arg2
, op
);
9604 v2
= value_as_long (arg2
);
9606 error (_("second operand of %s must not be zero."), op_string (op
));
9608 if (TYPE_UNSIGNED (type1
) || op
== BINOP_MOD
)
9609 return value_binop (arg1
, arg2
, op
);
9611 v1
= value_as_long (arg1
);
9616 if (!TRUNCATION_TOWARDS_ZERO
&& v1
* (v1
% v2
) < 0)
9617 v
+= v
> 0 ? -1 : 1;
9625 /* Should not reach this point. */
9629 val
= allocate_value (type1
);
9630 store_unsigned_integer (value_contents_raw (val
),
9631 TYPE_LENGTH (value_type (val
)),
9632 type_byte_order (type1
), v
);
9637 ada_value_equal (struct value
*arg1
, struct value
*arg2
)
9639 if (ada_is_direct_array_type (value_type (arg1
))
9640 || ada_is_direct_array_type (value_type (arg2
)))
9642 struct type
*arg1_type
, *arg2_type
;
9644 /* Automatically dereference any array reference before
9645 we attempt to perform the comparison. */
9646 arg1
= ada_coerce_ref (arg1
);
9647 arg2
= ada_coerce_ref (arg2
);
9649 arg1
= ada_coerce_to_simple_array (arg1
);
9650 arg2
= ada_coerce_to_simple_array (arg2
);
9652 arg1_type
= ada_check_typedef (value_type (arg1
));
9653 arg2_type
= ada_check_typedef (value_type (arg2
));
9655 if (arg1_type
->code () != TYPE_CODE_ARRAY
9656 || arg2_type
->code () != TYPE_CODE_ARRAY
)
9657 error (_("Attempt to compare array with non-array"));
9658 /* FIXME: The following works only for types whose
9659 representations use all bits (no padding or undefined bits)
9660 and do not have user-defined equality. */
9661 return (TYPE_LENGTH (arg1_type
) == TYPE_LENGTH (arg2_type
)
9662 && memcmp (value_contents (arg1
), value_contents (arg2
),
9663 TYPE_LENGTH (arg1_type
)) == 0);
9665 return value_equal (arg1
, arg2
);
9668 /* Total number of component associations in the aggregate starting at
9669 index PC in EXP. Assumes that index PC is the start of an
9673 num_component_specs (struct expression
*exp
, int pc
)
9677 m
= exp
->elts
[pc
+ 1].longconst
;
9680 for (i
= 0; i
< m
; i
+= 1)
9682 switch (exp
->elts
[pc
].opcode
)
9688 n
+= exp
->elts
[pc
+ 1].longconst
;
9691 ada_evaluate_subexp (NULL
, exp
, &pc
, EVAL_SKIP
);
9696 /* Assign the result of evaluating EXP starting at *POS to the INDEXth
9697 component of LHS (a simple array or a record), updating *POS past
9698 the expression, assuming that LHS is contained in CONTAINER. Does
9699 not modify the inferior's memory, nor does it modify LHS (unless
9700 LHS == CONTAINER). */
9703 assign_component (struct value
*container
, struct value
*lhs
, LONGEST index
,
9704 struct expression
*exp
, int *pos
)
9706 struct value
*mark
= value_mark ();
9708 struct type
*lhs_type
= check_typedef (value_type (lhs
));
9710 if (lhs_type
->code () == TYPE_CODE_ARRAY
)
9712 struct type
*index_type
= builtin_type (exp
->gdbarch
)->builtin_int
;
9713 struct value
*index_val
= value_from_longest (index_type
, index
);
9715 elt
= unwrap_value (ada_value_subscript (lhs
, 1, &index_val
));
9719 elt
= ada_index_struct_field (index
, lhs
, 0, value_type (lhs
));
9720 elt
= ada_to_fixed_value (elt
);
9723 if (exp
->elts
[*pos
].opcode
== OP_AGGREGATE
)
9724 assign_aggregate (container
, elt
, exp
, pos
, EVAL_NORMAL
);
9726 value_assign_to_component (container
, elt
,
9727 ada_evaluate_subexp (NULL
, exp
, pos
,
9730 value_free_to_mark (mark
);
9733 /* Assuming that LHS represents an lvalue having a record or array
9734 type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment
9735 of that aggregate's value to LHS, advancing *POS past the
9736 aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an
9737 lvalue containing LHS (possibly LHS itself). Does not modify
9738 the inferior's memory, nor does it modify the contents of
9739 LHS (unless == CONTAINER). Returns the modified CONTAINER. */
9741 static struct value
*
9742 assign_aggregate (struct value
*container
,
9743 struct value
*lhs
, struct expression
*exp
,
9744 int *pos
, enum noside noside
)
9746 struct type
*lhs_type
;
9747 int n
= exp
->elts
[*pos
+1].longconst
;
9748 LONGEST low_index
, high_index
;
9751 int max_indices
, num_indices
;
9755 if (noside
!= EVAL_NORMAL
)
9757 for (i
= 0; i
< n
; i
+= 1)
9758 ada_evaluate_subexp (NULL
, exp
, pos
, noside
);
9762 container
= ada_coerce_ref (container
);
9763 if (ada_is_direct_array_type (value_type (container
)))
9764 container
= ada_coerce_to_simple_array (container
);
9765 lhs
= ada_coerce_ref (lhs
);
9766 if (!deprecated_value_modifiable (lhs
))
9767 error (_("Left operand of assignment is not a modifiable lvalue."));
9769 lhs_type
= check_typedef (value_type (lhs
));
9770 if (ada_is_direct_array_type (lhs_type
))
9772 lhs
= ada_coerce_to_simple_array (lhs
);
9773 lhs_type
= check_typedef (value_type (lhs
));
9774 low_index
= TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type
);
9775 high_index
= TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type
);
9777 else if (lhs_type
->code () == TYPE_CODE_STRUCT
)
9780 high_index
= num_visible_fields (lhs_type
) - 1;
9783 error (_("Left-hand side must be array or record."));
9785 num_specs
= num_component_specs (exp
, *pos
- 3);
9786 max_indices
= 4 * num_specs
+ 4;
9787 indices
= XALLOCAVEC (LONGEST
, max_indices
);
9788 indices
[0] = indices
[1] = low_index
- 1;
9789 indices
[2] = indices
[3] = high_index
+ 1;
9792 for (i
= 0; i
< n
; i
+= 1)
9794 switch (exp
->elts
[*pos
].opcode
)
9797 aggregate_assign_from_choices (container
, lhs
, exp
, pos
, indices
,
9798 &num_indices
, max_indices
,
9799 low_index
, high_index
);
9802 aggregate_assign_positional (container
, lhs
, exp
, pos
, indices
,
9803 &num_indices
, max_indices
,
9804 low_index
, high_index
);
9808 error (_("Misplaced 'others' clause"));
9809 aggregate_assign_others (container
, lhs
, exp
, pos
, indices
,
9810 num_indices
, low_index
, high_index
);
9813 error (_("Internal error: bad aggregate clause"));
9820 /* Assign into the component of LHS indexed by the OP_POSITIONAL
9821 construct at *POS, updating *POS past the construct, given that
9822 the positions are relative to lower bound LOW, where HIGH is the
9823 upper bound. Record the position in INDICES[0 .. MAX_INDICES-1]
9824 updating *NUM_INDICES as needed. CONTAINER is as for
9825 assign_aggregate. */
9827 aggregate_assign_positional (struct value
*container
,
9828 struct value
*lhs
, struct expression
*exp
,
9829 int *pos
, LONGEST
*indices
, int *num_indices
,
9830 int max_indices
, LONGEST low
, LONGEST high
)
9832 LONGEST ind
= longest_to_int (exp
->elts
[*pos
+ 1].longconst
) + low
;
9834 if (ind
- 1 == high
)
9835 warning (_("Extra components in aggregate ignored."));
9838 add_component_interval (ind
, ind
, indices
, num_indices
, max_indices
);
9840 assign_component (container
, lhs
, ind
, exp
, pos
);
9843 ada_evaluate_subexp (NULL
, exp
, pos
, EVAL_SKIP
);
9846 /* Assign into the components of LHS indexed by the OP_CHOICES
9847 construct at *POS, updating *POS past the construct, given that
9848 the allowable indices are LOW..HIGH. Record the indices assigned
9849 to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as
9850 needed. CONTAINER is as for assign_aggregate. */
9852 aggregate_assign_from_choices (struct value
*container
,
9853 struct value
*lhs
, struct expression
*exp
,
9854 int *pos
, LONGEST
*indices
, int *num_indices
,
9855 int max_indices
, LONGEST low
, LONGEST high
)
9858 int n_choices
= longest_to_int (exp
->elts
[*pos
+1].longconst
);
9859 int choice_pos
, expr_pc
;
9860 int is_array
= ada_is_direct_array_type (value_type (lhs
));
9862 choice_pos
= *pos
+= 3;
9864 for (j
= 0; j
< n_choices
; j
+= 1)
9865 ada_evaluate_subexp (NULL
, exp
, pos
, EVAL_SKIP
);
9867 ada_evaluate_subexp (NULL
, exp
, pos
, EVAL_SKIP
);
9869 for (j
= 0; j
< n_choices
; j
+= 1)
9871 LONGEST lower
, upper
;
9872 enum exp_opcode op
= exp
->elts
[choice_pos
].opcode
;
9874 if (op
== OP_DISCRETE_RANGE
)
9877 lower
= value_as_long (ada_evaluate_subexp (NULL
, exp
, pos
,
9879 upper
= value_as_long (ada_evaluate_subexp (NULL
, exp
, pos
,
9884 lower
= value_as_long (ada_evaluate_subexp (NULL
, exp
, &choice_pos
,
9896 name
= &exp
->elts
[choice_pos
+ 2].string
;
9899 name
= exp
->elts
[choice_pos
+ 2].symbol
->natural_name ();
9902 error (_("Invalid record component association."));
9904 ada_evaluate_subexp (NULL
, exp
, &choice_pos
, EVAL_SKIP
);
9906 if (! find_struct_field (name
, value_type (lhs
), 0,
9907 NULL
, NULL
, NULL
, NULL
, &ind
))
9908 error (_("Unknown component name: %s."), name
);
9909 lower
= upper
= ind
;
9912 if (lower
<= upper
&& (lower
< low
|| upper
> high
))
9913 error (_("Index in component association out of bounds."));
9915 add_component_interval (lower
, upper
, indices
, num_indices
,
9917 while (lower
<= upper
)
9922 assign_component (container
, lhs
, lower
, exp
, &pos1
);
9928 /* Assign the value of the expression in the OP_OTHERS construct in
9929 EXP at *POS into the components of LHS indexed from LOW .. HIGH that
9930 have not been previously assigned. The index intervals already assigned
9931 are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the
9932 OP_OTHERS clause. CONTAINER is as for assign_aggregate. */
9934 aggregate_assign_others (struct value
*container
,
9935 struct value
*lhs
, struct expression
*exp
,
9936 int *pos
, LONGEST
*indices
, int num_indices
,
9937 LONGEST low
, LONGEST high
)
9940 int expr_pc
= *pos
+ 1;
9942 for (i
= 0; i
< num_indices
- 2; i
+= 2)
9946 for (ind
= indices
[i
+ 1] + 1; ind
< indices
[i
+ 2]; ind
+= 1)
9951 assign_component (container
, lhs
, ind
, exp
, &localpos
);
9954 ada_evaluate_subexp (NULL
, exp
, pos
, EVAL_SKIP
);
9957 /* Add the interval [LOW .. HIGH] to the sorted set of intervals
9958 [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ],
9959 modifying *SIZE as needed. It is an error if *SIZE exceeds
9960 MAX_SIZE. The resulting intervals do not overlap. */
9962 add_component_interval (LONGEST low
, LONGEST high
,
9963 LONGEST
* indices
, int *size
, int max_size
)
9967 for (i
= 0; i
< *size
; i
+= 2) {
9968 if (high
>= indices
[i
] && low
<= indices
[i
+ 1])
9972 for (kh
= i
+ 2; kh
< *size
; kh
+= 2)
9973 if (high
< indices
[kh
])
9975 if (low
< indices
[i
])
9977 indices
[i
+ 1] = indices
[kh
- 1];
9978 if (high
> indices
[i
+ 1])
9979 indices
[i
+ 1] = high
;
9980 memcpy (indices
+ i
+ 2, indices
+ kh
, *size
- kh
);
9981 *size
-= kh
- i
- 2;
9984 else if (high
< indices
[i
])
9988 if (*size
== max_size
)
9989 error (_("Internal error: miscounted aggregate components."));
9991 for (j
= *size
-1; j
>= i
+2; j
-= 1)
9992 indices
[j
] = indices
[j
- 2];
9994 indices
[i
+ 1] = high
;
9997 /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2
10000 static struct value
*
10001 ada_value_cast (struct type
*type
, struct value
*arg2
)
10003 if (type
== ada_check_typedef (value_type (arg2
)))
10006 if (ada_is_gnat_encoded_fixed_point_type (type
))
10007 return cast_to_fixed (type
, arg2
);
10009 if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2
)))
10010 return cast_from_fixed (type
, arg2
);
10012 return value_cast (type
, arg2
);
10015 /* Evaluating Ada expressions, and printing their result.
10016 ------------------------------------------------------
10021 We usually evaluate an Ada expression in order to print its value.
10022 We also evaluate an expression in order to print its type, which
10023 happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation,
10024 but we'll focus mostly on the EVAL_NORMAL phase. In practice, the
10025 EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of
10026 the evaluation compared to the EVAL_NORMAL, but is otherwise very
10029 Evaluating expressions is a little more complicated for Ada entities
10030 than it is for entities in languages such as C. The main reason for
10031 this is that Ada provides types whose definition might be dynamic.
10032 One example of such types is variant records. Or another example
10033 would be an array whose bounds can only be known at run time.
10035 The following description is a general guide as to what should be
10036 done (and what should NOT be done) in order to evaluate an expression
10037 involving such types, and when. This does not cover how the semantic
10038 information is encoded by GNAT as this is covered separatly. For the
10039 document used as the reference for the GNAT encoding, see exp_dbug.ads
10040 in the GNAT sources.
10042 Ideally, we should embed each part of this description next to its
10043 associated code. Unfortunately, the amount of code is so vast right
10044 now that it's hard to see whether the code handling a particular
10045 situation might be duplicated or not. One day, when the code is
10046 cleaned up, this guide might become redundant with the comments
10047 inserted in the code, and we might want to remove it.
10049 2. ``Fixing'' an Entity, the Simple Case:
10050 -----------------------------------------
10052 When evaluating Ada expressions, the tricky issue is that they may
10053 reference entities whose type contents and size are not statically
10054 known. Consider for instance a variant record:
10056 type Rec (Empty : Boolean := True) is record
10059 when False => Value : Integer;
10062 Yes : Rec := (Empty => False, Value => 1);
10063 No : Rec := (empty => True);
10065 The size and contents of that record depends on the value of the
10066 descriminant (Rec.Empty). At this point, neither the debugging
10067 information nor the associated type structure in GDB are able to
10068 express such dynamic types. So what the debugger does is to create
10069 "fixed" versions of the type that applies to the specific object.
10070 We also informally refer to this operation as "fixing" an object,
10071 which means creating its associated fixed type.
10073 Example: when printing the value of variable "Yes" above, its fixed
10074 type would look like this:
10081 On the other hand, if we printed the value of "No", its fixed type
10088 Things become a little more complicated when trying to fix an entity
10089 with a dynamic type that directly contains another dynamic type,
10090 such as an array of variant records, for instance. There are
10091 two possible cases: Arrays, and records.
10093 3. ``Fixing'' Arrays:
10094 ---------------------
10096 The type structure in GDB describes an array in terms of its bounds,
10097 and the type of its elements. By design, all elements in the array
10098 have the same type and we cannot represent an array of variant elements
10099 using the current type structure in GDB. When fixing an array,
10100 we cannot fix the array element, as we would potentially need one
10101 fixed type per element of the array. As a result, the best we can do
10102 when fixing an array is to produce an array whose bounds and size
10103 are correct (allowing us to read it from memory), but without having
10104 touched its element type. Fixing each element will be done later,
10105 when (if) necessary.
10107 Arrays are a little simpler to handle than records, because the same
10108 amount of memory is allocated for each element of the array, even if
10109 the amount of space actually used by each element differs from element
10110 to element. Consider for instance the following array of type Rec:
10112 type Rec_Array is array (1 .. 2) of Rec;
10114 The actual amount of memory occupied by each element might be different
10115 from element to element, depending on the value of their discriminant.
10116 But the amount of space reserved for each element in the array remains
10117 fixed regardless. So we simply need to compute that size using
10118 the debugging information available, from which we can then determine
10119 the array size (we multiply the number of elements of the array by
10120 the size of each element).
10122 The simplest case is when we have an array of a constrained element
10123 type. For instance, consider the following type declarations:
10125 type Bounded_String (Max_Size : Integer) is
10127 Buffer : String (1 .. Max_Size);
10129 type Bounded_String_Array is array (1 ..2) of Bounded_String (80);
10131 In this case, the compiler describes the array as an array of
10132 variable-size elements (identified by its XVS suffix) for which
10133 the size can be read in the parallel XVZ variable.
10135 In the case of an array of an unconstrained element type, the compiler
10136 wraps the array element inside a private PAD type. This type should not
10137 be shown to the user, and must be "unwrap"'ed before printing. Note
10138 that we also use the adjective "aligner" in our code to designate
10139 these wrapper types.
10141 In some cases, the size allocated for each element is statically
10142 known. In that case, the PAD type already has the correct size,
10143 and the array element should remain unfixed.
10145 But there are cases when this size is not statically known.
10146 For instance, assuming that "Five" is an integer variable:
10148 type Dynamic is array (1 .. Five) of Integer;
10149 type Wrapper (Has_Length : Boolean := False) is record
10152 when True => Length : Integer;
10153 when False => null;
10156 type Wrapper_Array is array (1 .. 2) of Wrapper;
10158 Hello : Wrapper_Array := (others => (Has_Length => True,
10159 Data => (others => 17),
10163 The debugging info would describe variable Hello as being an
10164 array of a PAD type. The size of that PAD type is not statically
10165 known, but can be determined using a parallel XVZ variable.
10166 In that case, a copy of the PAD type with the correct size should
10167 be used for the fixed array.
10169 3. ``Fixing'' record type objects:
10170 ----------------------------------
10172 Things are slightly different from arrays in the case of dynamic
10173 record types. In this case, in order to compute the associated
10174 fixed type, we need to determine the size and offset of each of
10175 its components. This, in turn, requires us to compute the fixed
10176 type of each of these components.
10178 Consider for instance the example:
10180 type Bounded_String (Max_Size : Natural) is record
10181 Str : String (1 .. Max_Size);
10184 My_String : Bounded_String (Max_Size => 10);
10186 In that case, the position of field "Length" depends on the size
10187 of field Str, which itself depends on the value of the Max_Size
10188 discriminant. In order to fix the type of variable My_String,
10189 we need to fix the type of field Str. Therefore, fixing a variant
10190 record requires us to fix each of its components.
10192 However, if a component does not have a dynamic size, the component
10193 should not be fixed. In particular, fields that use a PAD type
10194 should not fixed. Here is an example where this might happen
10195 (assuming type Rec above):
10197 type Container (Big : Boolean) is record
10201 when True => Another : Integer;
10202 when False => null;
10205 My_Container : Container := (Big => False,
10206 First => (Empty => True),
10209 In that example, the compiler creates a PAD type for component First,
10210 whose size is constant, and then positions the component After just
10211 right after it. The offset of component After is therefore constant
10214 The debugger computes the position of each field based on an algorithm
10215 that uses, among other things, the actual position and size of the field
10216 preceding it. Let's now imagine that the user is trying to print
10217 the value of My_Container. If the type fixing was recursive, we would
10218 end up computing the offset of field After based on the size of the
10219 fixed version of field First. And since in our example First has
10220 only one actual field, the size of the fixed type is actually smaller
10221 than the amount of space allocated to that field, and thus we would
10222 compute the wrong offset of field After.
10224 To make things more complicated, we need to watch out for dynamic
10225 components of variant records (identified by the ___XVL suffix in
10226 the component name). Even if the target type is a PAD type, the size
10227 of that type might not be statically known. So the PAD type needs
10228 to be unwrapped and the resulting type needs to be fixed. Otherwise,
10229 we might end up with the wrong size for our component. This can be
10230 observed with the following type declarations:
10232 type Octal is new Integer range 0 .. 7;
10233 type Octal_Array is array (Positive range <>) of Octal;
10234 pragma Pack (Octal_Array);
10236 type Octal_Buffer (Size : Positive) is record
10237 Buffer : Octal_Array (1 .. Size);
10241 In that case, Buffer is a PAD type whose size is unset and needs
10242 to be computed by fixing the unwrapped type.
10244 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity:
10245 ----------------------------------------------------------
10247 Lastly, when should the sub-elements of an entity that remained unfixed
10248 thus far, be actually fixed?
10250 The answer is: Only when referencing that element. For instance
10251 when selecting one component of a record, this specific component
10252 should be fixed at that point in time. Or when printing the value
10253 of a record, each component should be fixed before its value gets
10254 printed. Similarly for arrays, the element of the array should be
10255 fixed when printing each element of the array, or when extracting
10256 one element out of that array. On the other hand, fixing should
10257 not be performed on the elements when taking a slice of an array!
10259 Note that one of the side effects of miscomputing the offset and
10260 size of each field is that we end up also miscomputing the size
10261 of the containing type. This can have adverse results when computing
10262 the value of an entity. GDB fetches the value of an entity based
10263 on the size of its type, and thus a wrong size causes GDB to fetch
10264 the wrong amount of memory. In the case where the computed size is
10265 too small, GDB fetches too little data to print the value of our
10266 entity. Results in this case are unpredictable, as we usually read
10267 past the buffer containing the data =:-o. */
10269 /* Evaluate a subexpression of EXP, at index *POS, and return a value
10270 for that subexpression cast to TO_TYPE. Advance *POS over the
10274 ada_evaluate_subexp_for_cast (expression
*exp
, int *pos
,
10275 enum noside noside
, struct type
*to_type
)
10279 if (exp
->elts
[pc
].opcode
== OP_VAR_MSYM_VALUE
10280 || exp
->elts
[pc
].opcode
== OP_VAR_VALUE
)
10285 if (exp
->elts
[pc
].opcode
== OP_VAR_MSYM_VALUE
)
10287 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10288 return value_zero (to_type
, not_lval
);
10290 val
= evaluate_var_msym_value (noside
,
10291 exp
->elts
[pc
+ 1].objfile
,
10292 exp
->elts
[pc
+ 2].msymbol
);
10295 val
= evaluate_var_value (noside
,
10296 exp
->elts
[pc
+ 1].block
,
10297 exp
->elts
[pc
+ 2].symbol
);
10299 if (noside
== EVAL_SKIP
)
10300 return eval_skip_value (exp
);
10302 val
= ada_value_cast (to_type
, val
);
10304 /* Follow the Ada language semantics that do not allow taking
10305 an address of the result of a cast (view conversion in Ada). */
10306 if (VALUE_LVAL (val
) == lval_memory
)
10308 if (value_lazy (val
))
10309 value_fetch_lazy (val
);
10310 VALUE_LVAL (val
) = not_lval
;
10315 value
*val
= evaluate_subexp (to_type
, exp
, pos
, noside
);
10316 if (noside
== EVAL_SKIP
)
10317 return eval_skip_value (exp
);
10318 return ada_value_cast (to_type
, val
);
10321 /* Implement the evaluate_exp routine in the exp_descriptor structure
10322 for the Ada language. */
10324 static struct value
*
10325 ada_evaluate_subexp (struct type
*expect_type
, struct expression
*exp
,
10326 int *pos
, enum noside noside
)
10328 enum exp_opcode op
;
10332 struct value
*arg1
= NULL
, *arg2
= NULL
, *arg3
;
10335 struct value
**argvec
;
10339 op
= exp
->elts
[pc
].opcode
;
10345 arg1
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
10347 if (noside
== EVAL_NORMAL
)
10348 arg1
= unwrap_value (arg1
);
10350 /* If evaluating an OP_FLOAT and an EXPECT_TYPE was provided,
10351 then we need to perform the conversion manually, because
10352 evaluate_subexp_standard doesn't do it. This conversion is
10353 necessary in Ada because the different kinds of float/fixed
10354 types in Ada have different representations.
10356 Similarly, we need to perform the conversion from OP_LONG
10358 if ((op
== OP_FLOAT
|| op
== OP_LONG
) && expect_type
!= NULL
)
10359 arg1
= ada_value_cast (expect_type
, arg1
);
10365 struct value
*result
;
10368 result
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
10369 /* The result type will have code OP_STRING, bashed there from
10370 OP_ARRAY. Bash it back. */
10371 if (value_type (result
)->code () == TYPE_CODE_STRING
)
10372 value_type (result
)->set_code (TYPE_CODE_ARRAY
);
10378 type
= exp
->elts
[pc
+ 1].type
;
10379 return ada_evaluate_subexp_for_cast (exp
, pos
, noside
, type
);
10383 type
= exp
->elts
[pc
+ 1].type
;
10384 return ada_evaluate_subexp (type
, exp
, pos
, noside
);
10387 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10388 if (exp
->elts
[*pos
].opcode
== OP_AGGREGATE
)
10390 arg1
= assign_aggregate (arg1
, arg1
, exp
, pos
, noside
);
10391 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
10393 return ada_value_assign (arg1
, arg1
);
10395 /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
10396 except if the lhs of our assignment is a convenience variable.
10397 In the case of assigning to a convenience variable, the lhs
10398 should be exactly the result of the evaluation of the rhs. */
10399 type
= value_type (arg1
);
10400 if (VALUE_LVAL (arg1
) == lval_internalvar
)
10402 arg2
= evaluate_subexp (type
, exp
, pos
, noside
);
10403 if (noside
== EVAL_SKIP
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
10405 if (VALUE_LVAL (arg1
) == lval_internalvar
)
10409 else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1
)))
10410 arg2
= cast_to_fixed (value_type (arg1
), arg2
);
10411 else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2
)))
10413 (_("Fixed-point values must be assigned to fixed-point variables"));
10415 arg2
= coerce_for_assign (value_type (arg1
), arg2
);
10416 return ada_value_assign (arg1
, arg2
);
10419 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
10420 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
10421 if (noside
== EVAL_SKIP
)
10423 if (value_type (arg1
)->code () == TYPE_CODE_PTR
)
10424 return (value_from_longest
10425 (value_type (arg1
),
10426 value_as_long (arg1
) + value_as_long (arg2
)));
10427 if (value_type (arg2
)->code () == TYPE_CODE_PTR
)
10428 return (value_from_longest
10429 (value_type (arg2
),
10430 value_as_long (arg1
) + value_as_long (arg2
)));
10431 if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1
))
10432 || ada_is_gnat_encoded_fixed_point_type (value_type (arg2
)))
10433 && value_type (arg1
) != value_type (arg2
))
10434 error (_("Operands of fixed-point addition must have the same type"));
10435 /* Do the addition, and cast the result to the type of the first
10436 argument. We cannot cast the result to a reference type, so if
10437 ARG1 is a reference type, find its underlying type. */
10438 type
= value_type (arg1
);
10439 while (type
->code () == TYPE_CODE_REF
)
10440 type
= TYPE_TARGET_TYPE (type
);
10441 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10442 return value_cast (type
, value_binop (arg1
, arg2
, BINOP_ADD
));
10445 arg1
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
10446 arg2
= evaluate_subexp_with_coercion (exp
, pos
, noside
);
10447 if (noside
== EVAL_SKIP
)
10449 if (value_type (arg1
)->code () == TYPE_CODE_PTR
)
10450 return (value_from_longest
10451 (value_type (arg1
),
10452 value_as_long (arg1
) - value_as_long (arg2
)));
10453 if (value_type (arg2
)->code () == TYPE_CODE_PTR
)
10454 return (value_from_longest
10455 (value_type (arg2
),
10456 value_as_long (arg1
) - value_as_long (arg2
)));
10457 if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1
))
10458 || ada_is_gnat_encoded_fixed_point_type (value_type (arg2
)))
10459 && value_type (arg1
) != value_type (arg2
))
10460 error (_("Operands of fixed-point subtraction "
10461 "must have the same type"));
10462 /* Do the substraction, and cast the result to the type of the first
10463 argument. We cannot cast the result to a reference type, so if
10464 ARG1 is a reference type, find its underlying type. */
10465 type
= value_type (arg1
);
10466 while (type
->code () == TYPE_CODE_REF
)
10467 type
= TYPE_TARGET_TYPE (type
);
10468 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10469 return value_cast (type
, value_binop (arg1
, arg2
, BINOP_SUB
));
10475 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10476 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10477 if (noside
== EVAL_SKIP
)
10479 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10481 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10482 return value_zero (value_type (arg1
), not_lval
);
10486 type
= builtin_type (exp
->gdbarch
)->builtin_double
;
10487 if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1
)))
10488 arg1
= cast_from_fixed (type
, arg1
);
10489 if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2
)))
10490 arg2
= cast_from_fixed (type
, arg2
);
10491 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10492 return ada_value_binop (arg1
, arg2
, op
);
10496 case BINOP_NOTEQUAL
:
10497 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10498 arg2
= evaluate_subexp (value_type (arg1
), exp
, pos
, noside
);
10499 if (noside
== EVAL_SKIP
)
10501 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10505 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10506 tem
= ada_value_equal (arg1
, arg2
);
10508 if (op
== BINOP_NOTEQUAL
)
10510 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10511 return value_from_longest (type
, (LONGEST
) tem
);
10514 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10515 if (noside
== EVAL_SKIP
)
10517 else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1
)))
10518 return value_cast (value_type (arg1
), value_neg (arg1
));
10521 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
10522 return value_neg (arg1
);
10525 case BINOP_LOGICAL_AND
:
10526 case BINOP_LOGICAL_OR
:
10527 case UNOP_LOGICAL_NOT
:
10532 val
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
10533 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10534 return value_cast (type
, val
);
10537 case BINOP_BITWISE_AND
:
10538 case BINOP_BITWISE_IOR
:
10539 case BINOP_BITWISE_XOR
:
10543 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_AVOID_SIDE_EFFECTS
);
10545 val
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
10547 return value_cast (value_type (arg1
), val
);
10553 if (noside
== EVAL_SKIP
)
10559 if (SYMBOL_DOMAIN (exp
->elts
[pc
+ 2].symbol
) == UNDEF_DOMAIN
)
10560 /* Only encountered when an unresolved symbol occurs in a
10561 context other than a function call, in which case, it is
10563 error (_("Unexpected unresolved symbol, %s, during evaluation"),
10564 exp
->elts
[pc
+ 2].symbol
->print_name ());
10566 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10568 type
= static_unwrap_type (SYMBOL_TYPE (exp
->elts
[pc
+ 2].symbol
));
10569 /* Check to see if this is a tagged type. We also need to handle
10570 the case where the type is a reference to a tagged type, but
10571 we have to be careful to exclude pointers to tagged types.
10572 The latter should be shown as usual (as a pointer), whereas
10573 a reference should mostly be transparent to the user. */
10574 if (ada_is_tagged_type (type
, 0)
10575 || (type
->code () == TYPE_CODE_REF
10576 && ada_is_tagged_type (TYPE_TARGET_TYPE (type
), 0)))
10578 /* Tagged types are a little special in the fact that the real
10579 type is dynamic and can only be determined by inspecting the
10580 object's tag. This means that we need to get the object's
10581 value first (EVAL_NORMAL) and then extract the actual object
10584 Note that we cannot skip the final step where we extract
10585 the object type from its tag, because the EVAL_NORMAL phase
10586 results in dynamic components being resolved into fixed ones.
10587 This can cause problems when trying to print the type
10588 description of tagged types whose parent has a dynamic size:
10589 We use the type name of the "_parent" component in order
10590 to print the name of the ancestor type in the type description.
10591 If that component had a dynamic size, the resolution into
10592 a fixed type would result in the loss of that type name,
10593 thus preventing us from printing the name of the ancestor
10594 type in the type description. */
10595 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_NORMAL
);
10597 if (type
->code () != TYPE_CODE_REF
)
10599 struct type
*actual_type
;
10601 actual_type
= type_from_tag (ada_value_tag (arg1
));
10602 if (actual_type
== NULL
)
10603 /* If, for some reason, we were unable to determine
10604 the actual type from the tag, then use the static
10605 approximation that we just computed as a fallback.
10606 This can happen if the debugging information is
10607 incomplete, for instance. */
10608 actual_type
= type
;
10609 return value_zero (actual_type
, not_lval
);
10613 /* In the case of a ref, ada_coerce_ref takes care
10614 of determining the actual type. But the evaluation
10615 should return a ref as it should be valid to ask
10616 for its address; so rebuild a ref after coerce. */
10617 arg1
= ada_coerce_ref (arg1
);
10618 return value_ref (arg1
, TYPE_CODE_REF
);
10622 /* Records and unions for which GNAT encodings have been
10623 generated need to be statically fixed as well.
10624 Otherwise, non-static fixing produces a type where
10625 all dynamic properties are removed, which prevents "ptype"
10626 from being able to completely describe the type.
10627 For instance, a case statement in a variant record would be
10628 replaced by the relevant components based on the actual
10629 value of the discriminants. */
10630 if ((type
->code () == TYPE_CODE_STRUCT
10631 && dynamic_template_type (type
) != NULL
)
10632 || (type
->code () == TYPE_CODE_UNION
10633 && ada_find_parallel_type (type
, "___XVU") != NULL
))
10636 return value_zero (to_static_fixed_type (type
), not_lval
);
10640 arg1
= evaluate_subexp_standard (expect_type
, exp
, pos
, noside
);
10641 return ada_to_fixed_value (arg1
);
10646 /* Allocate arg vector, including space for the function to be
10647 called in argvec[0] and a terminating NULL. */
10648 nargs
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
10649 argvec
= XALLOCAVEC (struct value
*, nargs
+ 2);
10651 if (exp
->elts
[*pos
].opcode
== OP_VAR_VALUE
10652 && SYMBOL_DOMAIN (exp
->elts
[pc
+ 5].symbol
) == UNDEF_DOMAIN
)
10653 error (_("Unexpected unresolved symbol, %s, during evaluation"),
10654 exp
->elts
[pc
+ 5].symbol
->print_name ());
10657 for (tem
= 0; tem
<= nargs
; tem
+= 1)
10658 argvec
[tem
] = evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10661 if (noside
== EVAL_SKIP
)
10665 if (ada_is_constrained_packed_array_type
10666 (desc_base_type (value_type (argvec
[0]))))
10667 argvec
[0] = ada_coerce_to_simple_array (argvec
[0]);
10668 else if (value_type (argvec
[0])->code () == TYPE_CODE_ARRAY
10669 && TYPE_FIELD_BITSIZE (value_type (argvec
[0]), 0) != 0)
10670 /* This is a packed array that has already been fixed, and
10671 therefore already coerced to a simple array. Nothing further
10674 else if (value_type (argvec
[0])->code () == TYPE_CODE_REF
)
10676 /* Make sure we dereference references so that all the code below
10677 feels like it's really handling the referenced value. Wrapping
10678 types (for alignment) may be there, so make sure we strip them as
10680 argvec
[0] = ada_to_fixed_value (coerce_ref (argvec
[0]));
10682 else if (value_type (argvec
[0])->code () == TYPE_CODE_ARRAY
10683 && VALUE_LVAL (argvec
[0]) == lval_memory
)
10684 argvec
[0] = value_addr (argvec
[0]);
10686 type
= ada_check_typedef (value_type (argvec
[0]));
10688 /* Ada allows us to implicitly dereference arrays when subscripting
10689 them. So, if this is an array typedef (encoding use for array
10690 access types encoded as fat pointers), strip it now. */
10691 if (type
->code () == TYPE_CODE_TYPEDEF
)
10692 type
= ada_typedef_target_type (type
);
10694 if (type
->code () == TYPE_CODE_PTR
)
10696 switch (ada_check_typedef (TYPE_TARGET_TYPE (type
))->code ())
10698 case TYPE_CODE_FUNC
:
10699 type
= ada_check_typedef (TYPE_TARGET_TYPE (type
));
10701 case TYPE_CODE_ARRAY
:
10703 case TYPE_CODE_STRUCT
:
10704 if (noside
!= EVAL_AVOID_SIDE_EFFECTS
)
10705 argvec
[0] = ada_value_ind (argvec
[0]);
10706 type
= ada_check_typedef (TYPE_TARGET_TYPE (type
));
10709 error (_("cannot subscript or call something of type `%s'"),
10710 ada_type_name (value_type (argvec
[0])));
10715 switch (type
->code ())
10717 case TYPE_CODE_FUNC
:
10718 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10720 if (TYPE_TARGET_TYPE (type
) == NULL
)
10721 error_call_unknown_return_type (NULL
);
10722 return allocate_value (TYPE_TARGET_TYPE (type
));
10724 return call_function_by_hand (argvec
[0], NULL
,
10725 gdb::make_array_view (argvec
+ 1,
10727 case TYPE_CODE_INTERNAL_FUNCTION
:
10728 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10729 /* We don't know anything about what the internal
10730 function might return, but we have to return
10732 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
10735 return call_internal_function (exp
->gdbarch
, exp
->language_defn
,
10736 argvec
[0], nargs
, argvec
+ 1);
10738 case TYPE_CODE_STRUCT
:
10742 arity
= ada_array_arity (type
);
10743 type
= ada_array_element_type (type
, nargs
);
10745 error (_("cannot subscript or call a record"));
10746 if (arity
!= nargs
)
10747 error (_("wrong number of subscripts; expecting %d"), arity
);
10748 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10749 return value_zero (ada_aligned_type (type
), lval_memory
);
10751 unwrap_value (ada_value_subscript
10752 (argvec
[0], nargs
, argvec
+ 1));
10754 case TYPE_CODE_ARRAY
:
10755 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10757 type
= ada_array_element_type (type
, nargs
);
10759 error (_("element type of array unknown"));
10761 return value_zero (ada_aligned_type (type
), lval_memory
);
10764 unwrap_value (ada_value_subscript
10765 (ada_coerce_to_simple_array (argvec
[0]),
10766 nargs
, argvec
+ 1));
10767 case TYPE_CODE_PTR
: /* Pointer to array */
10768 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10770 type
= to_fixed_array_type (TYPE_TARGET_TYPE (type
), NULL
, 1);
10771 type
= ada_array_element_type (type
, nargs
);
10773 error (_("element type of array unknown"));
10775 return value_zero (ada_aligned_type (type
), lval_memory
);
10778 unwrap_value (ada_value_ptr_subscript (argvec
[0],
10779 nargs
, argvec
+ 1));
10782 error (_("Attempt to index or call something other than an "
10783 "array or function"));
10788 struct value
*array
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10789 struct value
*low_bound_val
=
10790 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10791 struct value
*high_bound_val
=
10792 evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10794 LONGEST high_bound
;
10796 low_bound_val
= coerce_ref (low_bound_val
);
10797 high_bound_val
= coerce_ref (high_bound_val
);
10798 low_bound
= value_as_long (low_bound_val
);
10799 high_bound
= value_as_long (high_bound_val
);
10801 if (noside
== EVAL_SKIP
)
10804 /* If this is a reference to an aligner type, then remove all
10806 if (value_type (array
)->code () == TYPE_CODE_REF
10807 && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array
))))
10808 TYPE_TARGET_TYPE (value_type (array
)) =
10809 ada_aligned_type (TYPE_TARGET_TYPE (value_type (array
)));
10811 if (ada_is_constrained_packed_array_type (value_type (array
)))
10812 error (_("cannot slice a packed array"));
10814 /* If this is a reference to an array or an array lvalue,
10815 convert to a pointer. */
10816 if (value_type (array
)->code () == TYPE_CODE_REF
10817 || (value_type (array
)->code () == TYPE_CODE_ARRAY
10818 && VALUE_LVAL (array
) == lval_memory
))
10819 array
= value_addr (array
);
10821 if (noside
== EVAL_AVOID_SIDE_EFFECTS
10822 && ada_is_array_descriptor_type (ada_check_typedef
10823 (value_type (array
))))
10824 return empty_array (ada_type_of_array (array
, 0), low_bound
,
10827 array
= ada_coerce_to_simple_array_ptr (array
);
10829 /* If we have more than one level of pointer indirection,
10830 dereference the value until we get only one level. */
10831 while (value_type (array
)->code () == TYPE_CODE_PTR
10832 && (TYPE_TARGET_TYPE (value_type (array
))->code ()
10834 array
= value_ind (array
);
10836 /* Make sure we really do have an array type before going further,
10837 to avoid a SEGV when trying to get the index type or the target
10838 type later down the road if the debug info generated by
10839 the compiler is incorrect or incomplete. */
10840 if (!ada_is_simple_array_type (value_type (array
)))
10841 error (_("cannot take slice of non-array"));
10843 if (ada_check_typedef (value_type (array
))->code ()
10846 struct type
*type0
= ada_check_typedef (value_type (array
));
10848 if (high_bound
< low_bound
|| noside
== EVAL_AVOID_SIDE_EFFECTS
)
10849 return empty_array (TYPE_TARGET_TYPE (type0
), low_bound
, high_bound
);
10852 struct type
*arr_type0
=
10853 to_fixed_array_type (TYPE_TARGET_TYPE (type0
), NULL
, 1);
10855 return ada_value_slice_from_ptr (array
, arr_type0
,
10856 longest_to_int (low_bound
),
10857 longest_to_int (high_bound
));
10860 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10862 else if (high_bound
< low_bound
)
10863 return empty_array (value_type (array
), low_bound
, high_bound
);
10865 return ada_value_slice (array
, longest_to_int (low_bound
),
10866 longest_to_int (high_bound
));
10869 case UNOP_IN_RANGE
:
10871 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10872 type
= check_typedef (exp
->elts
[pc
+ 1].type
);
10874 if (noside
== EVAL_SKIP
)
10877 switch (type
->code ())
10880 lim_warning (_("Membership test incompletely implemented; "
10881 "always returns true"));
10882 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10883 return value_from_longest (type
, (LONGEST
) 1);
10885 case TYPE_CODE_RANGE
:
10886 arg2
= value_from_longest (type
, TYPE_LOW_BOUND (type
));
10887 arg3
= value_from_longest (type
, TYPE_HIGH_BOUND (type
));
10888 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10889 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg3
);
10890 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10892 value_from_longest (type
,
10893 (value_less (arg1
, arg3
)
10894 || value_equal (arg1
, arg3
))
10895 && (value_less (arg2
, arg1
)
10896 || value_equal (arg2
, arg1
)));
10899 case BINOP_IN_BOUNDS
:
10901 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10902 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10904 if (noside
== EVAL_SKIP
)
10907 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10909 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10910 return value_zero (type
, not_lval
);
10913 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
10915 type
= ada_index_type (value_type (arg2
), tem
, "range");
10917 type
= value_type (arg1
);
10919 arg3
= value_from_longest (type
, ada_array_bound (arg2
, tem
, 1));
10920 arg2
= value_from_longest (type
, ada_array_bound (arg2
, tem
, 0));
10922 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10923 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg3
);
10924 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10926 value_from_longest (type
,
10927 (value_less (arg1
, arg3
)
10928 || value_equal (arg1
, arg3
))
10929 && (value_less (arg2
, arg1
)
10930 || value_equal (arg2
, arg1
)));
10932 case TERNOP_IN_RANGE
:
10933 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10934 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10935 arg3
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10937 if (noside
== EVAL_SKIP
)
10940 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
10941 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg3
);
10942 type
= language_bool_type (exp
->language_defn
, exp
->gdbarch
);
10944 value_from_longest (type
,
10945 (value_less (arg1
, arg3
)
10946 || value_equal (arg1
, arg3
))
10947 && (value_less (arg2
, arg1
)
10948 || value_equal (arg2
, arg1
)));
10952 case OP_ATR_LENGTH
:
10954 struct type
*type_arg
;
10956 if (exp
->elts
[*pos
].opcode
== OP_TYPE
)
10958 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
10960 type_arg
= check_typedef (exp
->elts
[pc
+ 2].type
);
10964 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
10968 if (exp
->elts
[*pos
].opcode
!= OP_LONG
)
10969 error (_("Invalid operand to '%s"), ada_attribute_name (op
));
10970 tem
= longest_to_int (exp
->elts
[*pos
+ 2].longconst
);
10973 if (noside
== EVAL_SKIP
)
10975 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
10977 if (type_arg
== NULL
)
10978 type_arg
= value_type (arg1
);
10980 if (ada_is_constrained_packed_array_type (type_arg
))
10981 type_arg
= decode_constrained_packed_array_type (type_arg
);
10983 if (!discrete_type_p (type_arg
))
10987 default: /* Should never happen. */
10988 error (_("unexpected attribute encountered"));
10991 type_arg
= ada_index_type (type_arg
, tem
,
10992 ada_attribute_name (op
));
10994 case OP_ATR_LENGTH
:
10995 type_arg
= builtin_type (exp
->gdbarch
)->builtin_int
;
11000 return value_zero (type_arg
, not_lval
);
11002 else if (type_arg
== NULL
)
11004 arg1
= ada_coerce_ref (arg1
);
11006 if (ada_is_constrained_packed_array_type (value_type (arg1
)))
11007 arg1
= ada_coerce_to_simple_array (arg1
);
11009 if (op
== OP_ATR_LENGTH
)
11010 type
= builtin_type (exp
->gdbarch
)->builtin_int
;
11013 type
= ada_index_type (value_type (arg1
), tem
,
11014 ada_attribute_name (op
));
11016 type
= builtin_type (exp
->gdbarch
)->builtin_int
;
11021 default: /* Should never happen. */
11022 error (_("unexpected attribute encountered"));
11024 return value_from_longest
11025 (type
, ada_array_bound (arg1
, tem
, 0));
11027 return value_from_longest
11028 (type
, ada_array_bound (arg1
, tem
, 1));
11029 case OP_ATR_LENGTH
:
11030 return value_from_longest
11031 (type
, ada_array_length (arg1
, tem
));
11034 else if (discrete_type_p (type_arg
))
11036 struct type
*range_type
;
11037 const char *name
= ada_type_name (type_arg
);
11040 if (name
!= NULL
&& type_arg
->code () != TYPE_CODE_ENUM
)
11041 range_type
= to_fixed_range_type (type_arg
, NULL
);
11042 if (range_type
== NULL
)
11043 range_type
= type_arg
;
11047 error (_("unexpected attribute encountered"));
11049 return value_from_longest
11050 (range_type
, ada_discrete_type_low_bound (range_type
));
11052 return value_from_longest
11053 (range_type
, ada_discrete_type_high_bound (range_type
));
11054 case OP_ATR_LENGTH
:
11055 error (_("the 'length attribute applies only to array types"));
11058 else if (type_arg
->code () == TYPE_CODE_FLT
)
11059 error (_("unimplemented type attribute"));
11064 if (ada_is_constrained_packed_array_type (type_arg
))
11065 type_arg
= decode_constrained_packed_array_type (type_arg
);
11067 if (op
== OP_ATR_LENGTH
)
11068 type
= builtin_type (exp
->gdbarch
)->builtin_int
;
11071 type
= ada_index_type (type_arg
, tem
, ada_attribute_name (op
));
11073 type
= builtin_type (exp
->gdbarch
)->builtin_int
;
11079 error (_("unexpected attribute encountered"));
11081 low
= ada_array_bound_from_type (type_arg
, tem
, 0);
11082 return value_from_longest (type
, low
);
11084 high
= ada_array_bound_from_type (type_arg
, tem
, 1);
11085 return value_from_longest (type
, high
);
11086 case OP_ATR_LENGTH
:
11087 low
= ada_array_bound_from_type (type_arg
, tem
, 0);
11088 high
= ada_array_bound_from_type (type_arg
, tem
, 1);
11089 return value_from_longest (type
, high
- low
+ 1);
11095 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11096 if (noside
== EVAL_SKIP
)
11099 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11100 return value_zero (ada_tag_type (arg1
), not_lval
);
11102 return ada_value_tag (arg1
);
11106 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
11107 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11108 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11109 if (noside
== EVAL_SKIP
)
11111 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11112 return value_zero (value_type (arg1
), not_lval
);
11115 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
11116 return value_binop (arg1
, arg2
,
11117 op
== OP_ATR_MIN
? BINOP_MIN
: BINOP_MAX
);
11120 case OP_ATR_MODULUS
:
11122 struct type
*type_arg
= check_typedef (exp
->elts
[pc
+ 2].type
);
11124 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
11125 if (noside
== EVAL_SKIP
)
11128 if (!ada_is_modular_type (type_arg
))
11129 error (_("'modulus must be applied to modular type"));
11131 return value_from_longest (TYPE_TARGET_TYPE (type_arg
),
11132 ada_modulus (type_arg
));
11137 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
11138 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11139 if (noside
== EVAL_SKIP
)
11141 type
= builtin_type (exp
->gdbarch
)->builtin_int
;
11142 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11143 return value_zero (type
, not_lval
);
11145 return value_pos_atr (type
, arg1
);
11148 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11149 type
= value_type (arg1
);
11151 /* If the argument is a reference, then dereference its type, since
11152 the user is really asking for the size of the actual object,
11153 not the size of the pointer. */
11154 if (type
->code () == TYPE_CODE_REF
)
11155 type
= TYPE_TARGET_TYPE (type
);
11157 if (noside
== EVAL_SKIP
)
11159 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11160 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
, not_lval
);
11162 return value_from_longest (builtin_type (exp
->gdbarch
)->builtin_int
,
11163 TARGET_CHAR_BIT
* TYPE_LENGTH (type
));
11166 evaluate_subexp (NULL_TYPE
, exp
, pos
, EVAL_SKIP
);
11167 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11168 type
= exp
->elts
[pc
+ 2].type
;
11169 if (noside
== EVAL_SKIP
)
11171 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11172 return value_zero (type
, not_lval
);
11174 return value_val_atr (type
, arg1
);
11177 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11178 arg2
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11179 if (noside
== EVAL_SKIP
)
11181 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11182 return value_zero (value_type (arg1
), not_lval
);
11185 /* For integer exponentiation operations,
11186 only promote the first argument. */
11187 if (is_integral_type (value_type (arg2
)))
11188 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
11190 binop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
, &arg2
);
11192 return value_binop (arg1
, arg2
, op
);
11196 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11197 if (noside
== EVAL_SKIP
)
11203 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11204 if (noside
== EVAL_SKIP
)
11206 unop_promote (exp
->language_defn
, exp
->gdbarch
, &arg1
);
11207 if (value_less (arg1
, value_zero (value_type (arg1
), not_lval
)))
11208 return value_neg (arg1
);
11213 preeval_pos
= *pos
;
11214 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11215 if (noside
== EVAL_SKIP
)
11217 type
= ada_check_typedef (value_type (arg1
));
11218 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11220 if (ada_is_array_descriptor_type (type
))
11221 /* GDB allows dereferencing GNAT array descriptors. */
11223 struct type
*arrType
= ada_type_of_array (arg1
, 0);
11225 if (arrType
== NULL
)
11226 error (_("Attempt to dereference null array pointer."));
11227 return value_at_lazy (arrType
, 0);
11229 else if (type
->code () == TYPE_CODE_PTR
11230 || type
->code () == TYPE_CODE_REF
11231 /* In C you can dereference an array to get the 1st elt. */
11232 || type
->code () == TYPE_CODE_ARRAY
)
11234 /* As mentioned in the OP_VAR_VALUE case, tagged types can
11235 only be determined by inspecting the object's tag.
11236 This means that we need to evaluate completely the
11237 expression in order to get its type. */
11239 if ((type
->code () == TYPE_CODE_REF
11240 || type
->code () == TYPE_CODE_PTR
)
11241 && ada_is_tagged_type (TYPE_TARGET_TYPE (type
), 0))
11243 arg1
= evaluate_subexp (NULL_TYPE
, exp
, &preeval_pos
,
11245 type
= value_type (ada_value_ind (arg1
));
11249 type
= to_static_fixed_type
11251 (ada_check_typedef (TYPE_TARGET_TYPE (type
))));
11253 ada_ensure_varsize_limit (type
);
11254 return value_zero (type
, lval_memory
);
11256 else if (type
->code () == TYPE_CODE_INT
)
11258 /* GDB allows dereferencing an int. */
11259 if (expect_type
== NULL
)
11260 return value_zero (builtin_type (exp
->gdbarch
)->builtin_int
,
11265 to_static_fixed_type (ada_aligned_type (expect_type
));
11266 return value_zero (expect_type
, lval_memory
);
11270 error (_("Attempt to take contents of a non-pointer value."));
11272 arg1
= ada_coerce_ref (arg1
); /* FIXME: What is this for?? */
11273 type
= ada_check_typedef (value_type (arg1
));
11275 if (type
->code () == TYPE_CODE_INT
)
11276 /* GDB allows dereferencing an int. If we were given
11277 the expect_type, then use that as the target type.
11278 Otherwise, assume that the target type is an int. */
11280 if (expect_type
!= NULL
)
11281 return ada_value_ind (value_cast (lookup_pointer_type (expect_type
),
11284 return value_at_lazy (builtin_type (exp
->gdbarch
)->builtin_int
,
11285 (CORE_ADDR
) value_as_address (arg1
));
11288 if (ada_is_array_descriptor_type (type
))
11289 /* GDB allows dereferencing GNAT array descriptors. */
11290 return ada_coerce_to_simple_array (arg1
);
11292 return ada_value_ind (arg1
);
11294 case STRUCTOP_STRUCT
:
11295 tem
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
11296 (*pos
) += 3 + BYTES_TO_EXP_ELEM (tem
+ 1);
11297 preeval_pos
= *pos
;
11298 arg1
= evaluate_subexp (NULL_TYPE
, exp
, pos
, noside
);
11299 if (noside
== EVAL_SKIP
)
11301 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11303 struct type
*type1
= value_type (arg1
);
11305 if (ada_is_tagged_type (type1
, 1))
11307 type
= ada_lookup_struct_elt_type (type1
,
11308 &exp
->elts
[pc
+ 2].string
,
11311 /* If the field is not found, check if it exists in the
11312 extension of this object's type. This means that we
11313 need to evaluate completely the expression. */
11317 arg1
= evaluate_subexp (NULL_TYPE
, exp
, &preeval_pos
,
11319 arg1
= ada_value_struct_elt (arg1
,
11320 &exp
->elts
[pc
+ 2].string
,
11322 arg1
= unwrap_value (arg1
);
11323 type
= value_type (ada_to_fixed_value (arg1
));
11328 ada_lookup_struct_elt_type (type1
, &exp
->elts
[pc
+ 2].string
, 1,
11331 return value_zero (ada_aligned_type (type
), lval_memory
);
11335 arg1
= ada_value_struct_elt (arg1
, &exp
->elts
[pc
+ 2].string
, 0);
11336 arg1
= unwrap_value (arg1
);
11337 return ada_to_fixed_value (arg1
);
11341 /* The value is not supposed to be used. This is here to make it
11342 easier to accommodate expressions that contain types. */
11344 if (noside
== EVAL_SKIP
)
11346 else if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
11347 return allocate_value (exp
->elts
[pc
+ 1].type
);
11349 error (_("Attempt to use a type name as an expression"));
11354 case OP_DISCRETE_RANGE
:
11355 case OP_POSITIONAL
:
11357 if (noside
== EVAL_NORMAL
)
11361 error (_("Undefined name, ambiguous name, or renaming used in "
11362 "component association: %s."), &exp
->elts
[pc
+2].string
);
11364 error (_("Aggregates only allowed on the right of an assignment"));
11366 internal_error (__FILE__
, __LINE__
,
11367 _("aggregate apparently mangled"));
11370 ada_forward_operator_length (exp
, pc
, &oplen
, &nargs
);
11372 for (tem
= 0; tem
< nargs
; tem
+= 1)
11373 ada_evaluate_subexp (NULL
, exp
, pos
, noside
);
11378 return eval_skip_value (exp
);
11384 /* If TYPE encodes an Ada fixed-point type, return the suffix of the
11385 type name that encodes the 'small and 'delta information.
11386 Otherwise, return NULL. */
11388 static const char *
11389 gnat_encoded_fixed_type_info (struct type
*type
)
11391 const char *name
= ada_type_name (type
);
11392 enum type_code code
= (type
== NULL
) ? TYPE_CODE_UNDEF
: type
->code ();
11394 if ((code
== TYPE_CODE_INT
|| code
== TYPE_CODE_RANGE
) && name
!= NULL
)
11396 const char *tail
= strstr (name
, "___XF_");
11403 else if (code
== TYPE_CODE_RANGE
&& TYPE_TARGET_TYPE (type
) != type
)
11404 return gnat_encoded_fixed_type_info (TYPE_TARGET_TYPE (type
));
11409 /* Returns non-zero iff TYPE represents an Ada fixed-point type. */
11412 ada_is_gnat_encoded_fixed_point_type (struct type
*type
)
11414 return gnat_encoded_fixed_type_info (type
) != NULL
;
11417 /* Return non-zero iff TYPE represents a System.Address type. */
11420 ada_is_system_address_type (struct type
*type
)
11422 return (type
->name () && strcmp (type
->name (), "system__address") == 0);
11425 /* Assuming that TYPE is the representation of an Ada fixed-point
11426 type, return the target floating-point type to be used to represent
11427 of this type during internal computation. */
11429 static struct type
*
11430 ada_scaling_type (struct type
*type
)
11432 return builtin_type (get_type_arch (type
))->builtin_long_double
;
11435 /* Assuming that TYPE is the representation of an Ada fixed-point
11436 type, return its delta, or NULL if the type is malformed and the
11437 delta cannot be determined. */
11440 gnat_encoded_fixed_point_delta (struct type
*type
)
11442 const char *encoding
= gnat_encoded_fixed_type_info (type
);
11443 struct type
*scale_type
= ada_scaling_type (type
);
11445 long long num
, den
;
11447 if (sscanf (encoding
, "_%lld_%lld", &num
, &den
) < 2)
11450 return value_binop (value_from_longest (scale_type
, num
),
11451 value_from_longest (scale_type
, den
), BINOP_DIV
);
11454 /* Assuming that ada_is_gnat_encoded_fixed_point_type (TYPE), return
11455 the scaling factor ('SMALL value) associated with the type. */
11458 ada_scaling_factor (struct type
*type
)
11460 const char *encoding
= gnat_encoded_fixed_type_info (type
);
11461 struct type
*scale_type
= ada_scaling_type (type
);
11463 long long num0
, den0
, num1
, den1
;
11466 n
= sscanf (encoding
, "_%lld_%lld_%lld_%lld",
11467 &num0
, &den0
, &num1
, &den1
);
11470 return value_from_longest (scale_type
, 1);
11472 return value_binop (value_from_longest (scale_type
, num1
),
11473 value_from_longest (scale_type
, den1
), BINOP_DIV
);
11475 return value_binop (value_from_longest (scale_type
, num0
),
11476 value_from_longest (scale_type
, den0
), BINOP_DIV
);
11483 /* Scan STR beginning at position K for a discriminant name, and
11484 return the value of that discriminant field of DVAL in *PX. If
11485 PNEW_K is not null, put the position of the character beyond the
11486 name scanned in *PNEW_K. Return 1 if successful; return 0 and do
11487 not alter *PX and *PNEW_K if unsuccessful. */
11490 scan_discrim_bound (const char *str
, int k
, struct value
*dval
, LONGEST
* px
,
11493 static char *bound_buffer
= NULL
;
11494 static size_t bound_buffer_len
= 0;
11495 const char *pstart
, *pend
, *bound
;
11496 struct value
*bound_val
;
11498 if (dval
== NULL
|| str
== NULL
|| str
[k
] == '\0')
11502 pend
= strstr (pstart
, "__");
11506 k
+= strlen (bound
);
11510 int len
= pend
- pstart
;
11512 /* Strip __ and beyond. */
11513 GROW_VECT (bound_buffer
, bound_buffer_len
, len
+ 1);
11514 strncpy (bound_buffer
, pstart
, len
);
11515 bound_buffer
[len
] = '\0';
11517 bound
= bound_buffer
;
11521 bound_val
= ada_search_struct_field (bound
, dval
, 0, value_type (dval
));
11522 if (bound_val
== NULL
)
11525 *px
= value_as_long (bound_val
);
11526 if (pnew_k
!= NULL
)
11531 /* Value of variable named NAME in the current environment. If
11532 no such variable found, then if ERR_MSG is null, returns 0, and
11533 otherwise causes an error with message ERR_MSG. */
11535 static struct value
*
11536 get_var_value (const char *name
, const char *err_msg
)
11538 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
11540 std::vector
<struct block_symbol
> syms
;
11541 int nsyms
= ada_lookup_symbol_list_worker (lookup_name
,
11542 get_selected_block (0),
11543 VAR_DOMAIN
, &syms
, 1);
11547 if (err_msg
== NULL
)
11550 error (("%s"), err_msg
);
11553 return value_of_variable (syms
[0].symbol
, syms
[0].block
);
11556 /* Value of integer variable named NAME in the current environment.
11557 If no such variable is found, returns false. Otherwise, sets VALUE
11558 to the variable's value and returns true. */
11561 get_int_var_value (const char *name
, LONGEST
&value
)
11563 struct value
*var_val
= get_var_value (name
, 0);
11568 value
= value_as_long (var_val
);
11573 /* Return a range type whose base type is that of the range type named
11574 NAME in the current environment, and whose bounds are calculated
11575 from NAME according to the GNAT range encoding conventions.
11576 Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the
11577 corresponding range type from debug information; fall back to using it
11578 if symbol lookup fails. If a new type must be created, allocate it
11579 like ORIG_TYPE was. The bounds information, in general, is encoded
11580 in NAME, the base type given in the named range type. */
11582 static struct type
*
11583 to_fixed_range_type (struct type
*raw_type
, struct value
*dval
)
11586 struct type
*base_type
;
11587 const char *subtype_info
;
11589 gdb_assert (raw_type
!= NULL
);
11590 gdb_assert (raw_type
->name () != NULL
);
11592 if (raw_type
->code () == TYPE_CODE_RANGE
)
11593 base_type
= TYPE_TARGET_TYPE (raw_type
);
11595 base_type
= raw_type
;
11597 name
= raw_type
->name ();
11598 subtype_info
= strstr (name
, "___XD");
11599 if (subtype_info
== NULL
)
11601 LONGEST L
= ada_discrete_type_low_bound (raw_type
);
11602 LONGEST U
= ada_discrete_type_high_bound (raw_type
);
11604 if (L
< INT_MIN
|| U
> INT_MAX
)
11607 return create_static_range_type (alloc_type_copy (raw_type
), raw_type
,
11612 static char *name_buf
= NULL
;
11613 static size_t name_len
= 0;
11614 int prefix_len
= subtype_info
- name
;
11617 const char *bounds_str
;
11620 GROW_VECT (name_buf
, name_len
, prefix_len
+ 5);
11621 strncpy (name_buf
, name
, prefix_len
);
11622 name_buf
[prefix_len
] = '\0';
11625 bounds_str
= strchr (subtype_info
, '_');
11628 if (*subtype_info
== 'L')
11630 if (!ada_scan_number (bounds_str
, n
, &L
, &n
)
11631 && !scan_discrim_bound (bounds_str
, n
, dval
, &L
, &n
))
11633 if (bounds_str
[n
] == '_')
11635 else if (bounds_str
[n
] == '.') /* FIXME? SGI Workshop kludge. */
11641 strcpy (name_buf
+ prefix_len
, "___L");
11642 if (!get_int_var_value (name_buf
, L
))
11644 lim_warning (_("Unknown lower bound, using 1."));
11649 if (*subtype_info
== 'U')
11651 if (!ada_scan_number (bounds_str
, n
, &U
, &n
)
11652 && !scan_discrim_bound (bounds_str
, n
, dval
, &U
, &n
))
11657 strcpy (name_buf
+ prefix_len
, "___U");
11658 if (!get_int_var_value (name_buf
, U
))
11660 lim_warning (_("Unknown upper bound, using %ld."), (long) L
);
11665 type
= create_static_range_type (alloc_type_copy (raw_type
),
11667 /* create_static_range_type alters the resulting type's length
11668 to match the size of the base_type, which is not what we want.
11669 Set it back to the original range type's length. */
11670 TYPE_LENGTH (type
) = TYPE_LENGTH (raw_type
);
11671 type
->set_name (name
);
11676 /* True iff NAME is the name of a range type. */
11679 ada_is_range_type_name (const char *name
)
11681 return (name
!= NULL
&& strstr (name
, "___XD"));
11685 /* Modular types */
11687 /* True iff TYPE is an Ada modular type. */
11690 ada_is_modular_type (struct type
*type
)
11692 struct type
*subranged_type
= get_base_type (type
);
11694 return (subranged_type
!= NULL
&& type
->code () == TYPE_CODE_RANGE
11695 && subranged_type
->code () == TYPE_CODE_INT
11696 && TYPE_UNSIGNED (subranged_type
));
11699 /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */
11702 ada_modulus (struct type
*type
)
11704 return (ULONGEST
) TYPE_HIGH_BOUND (type
) + 1;
11708 /* Ada exception catchpoint support:
11709 ---------------------------------
11711 We support 3 kinds of exception catchpoints:
11712 . catchpoints on Ada exceptions
11713 . catchpoints on unhandled Ada exceptions
11714 . catchpoints on failed assertions
11716 Exceptions raised during failed assertions, or unhandled exceptions
11717 could perfectly be caught with the general catchpoint on Ada exceptions.
11718 However, we can easily differentiate these two special cases, and having
11719 the option to distinguish these two cases from the rest can be useful
11720 to zero-in on certain situations.
11722 Exception catchpoints are a specialized form of breakpoint,
11723 since they rely on inserting breakpoints inside known routines
11724 of the GNAT runtime. The implementation therefore uses a standard
11725 breakpoint structure of the BP_BREAKPOINT type, but with its own set
11728 Support in the runtime for exception catchpoints have been changed
11729 a few times already, and these changes affect the implementation
11730 of these catchpoints. In order to be able to support several
11731 variants of the runtime, we use a sniffer that will determine
11732 the runtime variant used by the program being debugged. */
11734 /* Ada's standard exceptions.
11736 The Ada 83 standard also defined Numeric_Error. But there so many
11737 situations where it was unclear from the Ada 83 Reference Manual
11738 (RM) whether Constraint_Error or Numeric_Error should be raised,
11739 that the ARG (Ada Rapporteur Group) eventually issued a Binding
11740 Interpretation saying that anytime the RM says that Numeric_Error
11741 should be raised, the implementation may raise Constraint_Error.
11742 Ada 95 went one step further and pretty much removed Numeric_Error
11743 from the list of standard exceptions (it made it a renaming of
11744 Constraint_Error, to help preserve compatibility when compiling
11745 an Ada83 compiler). As such, we do not include Numeric_Error from
11746 this list of standard exceptions. */
11748 static const char *standard_exc
[] = {
11749 "constraint_error",
11755 typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype
) (void);
11757 /* A structure that describes how to support exception catchpoints
11758 for a given executable. */
11760 struct exception_support_info
11762 /* The name of the symbol to break on in order to insert
11763 a catchpoint on exceptions. */
11764 const char *catch_exception_sym
;
11766 /* The name of the symbol to break on in order to insert
11767 a catchpoint on unhandled exceptions. */
11768 const char *catch_exception_unhandled_sym
;
11770 /* The name of the symbol to break on in order to insert
11771 a catchpoint on failed assertions. */
11772 const char *catch_assert_sym
;
11774 /* The name of the symbol to break on in order to insert
11775 a catchpoint on exception handling. */
11776 const char *catch_handlers_sym
;
11778 /* Assuming that the inferior just triggered an unhandled exception
11779 catchpoint, this function is responsible for returning the address
11780 in inferior memory where the name of that exception is stored.
11781 Return zero if the address could not be computed. */
11782 ada_unhandled_exception_name_addr_ftype
*unhandled_exception_name_addr
;
11785 static CORE_ADDR
ada_unhandled_exception_name_addr (void);
11786 static CORE_ADDR
ada_unhandled_exception_name_addr_from_raise (void);
11788 /* The following exception support info structure describes how to
11789 implement exception catchpoints with the latest version of the
11790 Ada runtime (as of 2019-08-??). */
11792 static const struct exception_support_info default_exception_support_info
=
11794 "__gnat_debug_raise_exception", /* catch_exception_sym */
11795 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11796 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
11797 "__gnat_begin_handler_v1", /* catch_handlers_sym */
11798 ada_unhandled_exception_name_addr
11801 /* The following exception support info structure describes how to
11802 implement exception catchpoints with an earlier version of the
11803 Ada runtime (as of 2007-03-06) using v0 of the EH ABI. */
11805 static const struct exception_support_info exception_support_info_v0
=
11807 "__gnat_debug_raise_exception", /* catch_exception_sym */
11808 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11809 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
11810 "__gnat_begin_handler", /* catch_handlers_sym */
11811 ada_unhandled_exception_name_addr
11814 /* The following exception support info structure describes how to
11815 implement exception catchpoints with a slightly older version
11816 of the Ada runtime. */
11818 static const struct exception_support_info exception_support_info_fallback
=
11820 "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */
11821 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11822 "system__assertions__raise_assert_failure", /* catch_assert_sym */
11823 "__gnat_begin_handler", /* catch_handlers_sym */
11824 ada_unhandled_exception_name_addr_from_raise
11827 /* Return nonzero if we can detect the exception support routines
11828 described in EINFO.
11830 This function errors out if an abnormal situation is detected
11831 (for instance, if we find the exception support routines, but
11832 that support is found to be incomplete). */
11835 ada_has_this_exception_support (const struct exception_support_info
*einfo
)
11837 struct symbol
*sym
;
11839 /* The symbol we're looking up is provided by a unit in the GNAT runtime
11840 that should be compiled with debugging information. As a result, we
11841 expect to find that symbol in the symtabs. */
11843 sym
= standard_lookup (einfo
->catch_exception_sym
, NULL
, VAR_DOMAIN
);
11846 /* Perhaps we did not find our symbol because the Ada runtime was
11847 compiled without debugging info, or simply stripped of it.
11848 It happens on some GNU/Linux distributions for instance, where
11849 users have to install a separate debug package in order to get
11850 the runtime's debugging info. In that situation, let the user
11851 know why we cannot insert an Ada exception catchpoint.
11853 Note: Just for the purpose of inserting our Ada exception
11854 catchpoint, we could rely purely on the associated minimal symbol.
11855 But we would be operating in degraded mode anyway, since we are
11856 still lacking the debugging info needed later on to extract
11857 the name of the exception being raised (this name is printed in
11858 the catchpoint message, and is also used when trying to catch
11859 a specific exception). We do not handle this case for now. */
11860 struct bound_minimal_symbol msym
11861 = lookup_minimal_symbol (einfo
->catch_exception_sym
, NULL
, NULL
);
11863 if (msym
.minsym
&& MSYMBOL_TYPE (msym
.minsym
) != mst_solib_trampoline
)
11864 error (_("Your Ada runtime appears to be missing some debugging "
11865 "information.\nCannot insert Ada exception catchpoint "
11866 "in this configuration."));
11871 /* Make sure that the symbol we found corresponds to a function. */
11873 if (SYMBOL_CLASS (sym
) != LOC_BLOCK
)
11875 error (_("Symbol \"%s\" is not a function (class = %d)"),
11876 sym
->linkage_name (), SYMBOL_CLASS (sym
));
11880 sym
= standard_lookup (einfo
->catch_handlers_sym
, NULL
, VAR_DOMAIN
);
11883 struct bound_minimal_symbol msym
11884 = lookup_minimal_symbol (einfo
->catch_handlers_sym
, NULL
, NULL
);
11886 if (msym
.minsym
&& MSYMBOL_TYPE (msym
.minsym
) != mst_solib_trampoline
)
11887 error (_("Your Ada runtime appears to be missing some debugging "
11888 "information.\nCannot insert Ada exception catchpoint "
11889 "in this configuration."));
11894 /* Make sure that the symbol we found corresponds to a function. */
11896 if (SYMBOL_CLASS (sym
) != LOC_BLOCK
)
11898 error (_("Symbol \"%s\" is not a function (class = %d)"),
11899 sym
->linkage_name (), SYMBOL_CLASS (sym
));
11906 /* Inspect the Ada runtime and determine which exception info structure
11907 should be used to provide support for exception catchpoints.
11909 This function will always set the per-inferior exception_info,
11910 or raise an error. */
11913 ada_exception_support_info_sniffer (void)
11915 struct ada_inferior_data
*data
= get_ada_inferior_data (current_inferior ());
11917 /* If the exception info is already known, then no need to recompute it. */
11918 if (data
->exception_info
!= NULL
)
11921 /* Check the latest (default) exception support info. */
11922 if (ada_has_this_exception_support (&default_exception_support_info
))
11924 data
->exception_info
= &default_exception_support_info
;
11928 /* Try the v0 exception suport info. */
11929 if (ada_has_this_exception_support (&exception_support_info_v0
))
11931 data
->exception_info
= &exception_support_info_v0
;
11935 /* Try our fallback exception suport info. */
11936 if (ada_has_this_exception_support (&exception_support_info_fallback
))
11938 data
->exception_info
= &exception_support_info_fallback
;
11942 /* Sometimes, it is normal for us to not be able to find the routine
11943 we are looking for. This happens when the program is linked with
11944 the shared version of the GNAT runtime, and the program has not been
11945 started yet. Inform the user of these two possible causes if
11948 if (ada_update_initial_language (language_unknown
) != language_ada
)
11949 error (_("Unable to insert catchpoint. Is this an Ada main program?"));
11951 /* If the symbol does not exist, then check that the program is
11952 already started, to make sure that shared libraries have been
11953 loaded. If it is not started, this may mean that the symbol is
11954 in a shared library. */
11956 if (inferior_ptid
.pid () == 0)
11957 error (_("Unable to insert catchpoint. Try to start the program first."));
11959 /* At this point, we know that we are debugging an Ada program and
11960 that the inferior has been started, but we still are not able to
11961 find the run-time symbols. That can mean that we are in
11962 configurable run time mode, or that a-except as been optimized
11963 out by the linker... In any case, at this point it is not worth
11964 supporting this feature. */
11966 error (_("Cannot insert Ada exception catchpoints in this configuration."));
11969 /* True iff FRAME is very likely to be that of a function that is
11970 part of the runtime system. This is all very heuristic, but is
11971 intended to be used as advice as to what frames are uninteresting
11975 is_known_support_routine (struct frame_info
*frame
)
11977 enum language func_lang
;
11979 const char *fullname
;
11981 /* If this code does not have any debugging information (no symtab),
11982 This cannot be any user code. */
11984 symtab_and_line sal
= find_frame_sal (frame
);
11985 if (sal
.symtab
== NULL
)
11988 /* If there is a symtab, but the associated source file cannot be
11989 located, then assume this is not user code: Selecting a frame
11990 for which we cannot display the code would not be very helpful
11991 for the user. This should also take care of case such as VxWorks
11992 where the kernel has some debugging info provided for a few units. */
11994 fullname
= symtab_to_fullname (sal
.symtab
);
11995 if (access (fullname
, R_OK
) != 0)
11998 /* Check the unit filename against the Ada runtime file naming.
11999 We also check the name of the objfile against the name of some
12000 known system libraries that sometimes come with debugging info
12003 for (i
= 0; known_runtime_file_name_patterns
[i
] != NULL
; i
+= 1)
12005 re_comp (known_runtime_file_name_patterns
[i
]);
12006 if (re_exec (lbasename (sal
.symtab
->filename
)))
12008 if (SYMTAB_OBJFILE (sal
.symtab
) != NULL
12009 && re_exec (objfile_name (SYMTAB_OBJFILE (sal
.symtab
))))
12013 /* Check whether the function is a GNAT-generated entity. */
12015 gdb::unique_xmalloc_ptr
<char> func_name
12016 = find_frame_funname (frame
, &func_lang
, NULL
);
12017 if (func_name
== NULL
)
12020 for (i
= 0; known_auxiliary_function_name_patterns
[i
] != NULL
; i
+= 1)
12022 re_comp (known_auxiliary_function_name_patterns
[i
]);
12023 if (re_exec (func_name
.get ()))
12030 /* Find the first frame that contains debugging information and that is not
12031 part of the Ada run-time, starting from FI and moving upward. */
12034 ada_find_printable_frame (struct frame_info
*fi
)
12036 for (; fi
!= NULL
; fi
= get_prev_frame (fi
))
12038 if (!is_known_support_routine (fi
))
12047 /* Assuming that the inferior just triggered an unhandled exception
12048 catchpoint, return the address in inferior memory where the name
12049 of the exception is stored.
12051 Return zero if the address could not be computed. */
12054 ada_unhandled_exception_name_addr (void)
12056 return parse_and_eval_address ("e.full_name");
12059 /* Same as ada_unhandled_exception_name_addr, except that this function
12060 should be used when the inferior uses an older version of the runtime,
12061 where the exception name needs to be extracted from a specific frame
12062 several frames up in the callstack. */
12065 ada_unhandled_exception_name_addr_from_raise (void)
12068 struct frame_info
*fi
;
12069 struct ada_inferior_data
*data
= get_ada_inferior_data (current_inferior ());
12071 /* To determine the name of this exception, we need to select
12072 the frame corresponding to RAISE_SYM_NAME. This frame is
12073 at least 3 levels up, so we simply skip the first 3 frames
12074 without checking the name of their associated function. */
12075 fi
= get_current_frame ();
12076 for (frame_level
= 0; frame_level
< 3; frame_level
+= 1)
12078 fi
= get_prev_frame (fi
);
12082 enum language func_lang
;
12084 gdb::unique_xmalloc_ptr
<char> func_name
12085 = find_frame_funname (fi
, &func_lang
, NULL
);
12086 if (func_name
!= NULL
)
12088 if (strcmp (func_name
.get (),
12089 data
->exception_info
->catch_exception_sym
) == 0)
12090 break; /* We found the frame we were looking for... */
12092 fi
= get_prev_frame (fi
);
12099 return parse_and_eval_address ("id.full_name");
12102 /* Assuming the inferior just triggered an Ada exception catchpoint
12103 (of any type), return the address in inferior memory where the name
12104 of the exception is stored, if applicable.
12106 Assumes the selected frame is the current frame.
12108 Return zero if the address could not be computed, or if not relevant. */
12111 ada_exception_name_addr_1 (enum ada_exception_catchpoint_kind ex
,
12112 struct breakpoint
*b
)
12114 struct ada_inferior_data
*data
= get_ada_inferior_data (current_inferior ());
12118 case ada_catch_exception
:
12119 return (parse_and_eval_address ("e.full_name"));
12122 case ada_catch_exception_unhandled
:
12123 return data
->exception_info
->unhandled_exception_name_addr ();
12126 case ada_catch_handlers
:
12127 return 0; /* The runtimes does not provide access to the exception
12131 case ada_catch_assert
:
12132 return 0; /* Exception name is not relevant in this case. */
12136 internal_error (__FILE__
, __LINE__
, _("unexpected catchpoint type"));
12140 return 0; /* Should never be reached. */
12143 /* Assuming the inferior is stopped at an exception catchpoint,
12144 return the message which was associated to the exception, if
12145 available. Return NULL if the message could not be retrieved.
12147 Note: The exception message can be associated to an exception
12148 either through the use of the Raise_Exception function, or
12149 more simply (Ada 2005 and later), via:
12151 raise Exception_Name with "exception message";
12155 static gdb::unique_xmalloc_ptr
<char>
12156 ada_exception_message_1 (void)
12158 struct value
*e_msg_val
;
12161 /* For runtimes that support this feature, the exception message
12162 is passed as an unbounded string argument called "message". */
12163 e_msg_val
= parse_and_eval ("message");
12164 if (e_msg_val
== NULL
)
12165 return NULL
; /* Exception message not supported. */
12167 e_msg_val
= ada_coerce_to_simple_array (e_msg_val
);
12168 gdb_assert (e_msg_val
!= NULL
);
12169 e_msg_len
= TYPE_LENGTH (value_type (e_msg_val
));
12171 /* If the message string is empty, then treat it as if there was
12172 no exception message. */
12173 if (e_msg_len
<= 0)
12176 gdb::unique_xmalloc_ptr
<char> e_msg ((char *) xmalloc (e_msg_len
+ 1));
12177 read_memory_string (value_address (e_msg_val
), e_msg
.get (), e_msg_len
+ 1);
12178 e_msg
.get ()[e_msg_len
] = '\0';
12183 /* Same as ada_exception_message_1, except that all exceptions are
12184 contained here (returning NULL instead). */
12186 static gdb::unique_xmalloc_ptr
<char>
12187 ada_exception_message (void)
12189 gdb::unique_xmalloc_ptr
<char> e_msg
;
12193 e_msg
= ada_exception_message_1 ();
12195 catch (const gdb_exception_error
&e
)
12197 e_msg
.reset (nullptr);
12203 /* Same as ada_exception_name_addr_1, except that it intercepts and contains
12204 any error that ada_exception_name_addr_1 might cause to be thrown.
12205 When an error is intercepted, a warning with the error message is printed,
12206 and zero is returned. */
12209 ada_exception_name_addr (enum ada_exception_catchpoint_kind ex
,
12210 struct breakpoint
*b
)
12212 CORE_ADDR result
= 0;
12216 result
= ada_exception_name_addr_1 (ex
, b
);
12219 catch (const gdb_exception_error
&e
)
12221 warning (_("failed to get exception name: %s"), e
.what ());
12228 static std::string ada_exception_catchpoint_cond_string
12229 (const char *excep_string
,
12230 enum ada_exception_catchpoint_kind ex
);
12232 /* Ada catchpoints.
12234 In the case of catchpoints on Ada exceptions, the catchpoint will
12235 stop the target on every exception the program throws. When a user
12236 specifies the name of a specific exception, we translate this
12237 request into a condition expression (in text form), and then parse
12238 it into an expression stored in each of the catchpoint's locations.
12239 We then use this condition to check whether the exception that was
12240 raised is the one the user is interested in. If not, then the
12241 target is resumed again. We store the name of the requested
12242 exception, in order to be able to re-set the condition expression
12243 when symbols change. */
12245 /* An instance of this type is used to represent an Ada catchpoint
12246 breakpoint location. */
12248 class ada_catchpoint_location
: public bp_location
12251 ada_catchpoint_location (breakpoint
*owner
)
12252 : bp_location (owner
, bp_loc_software_breakpoint
)
12255 /* The condition that checks whether the exception that was raised
12256 is the specific exception the user specified on catchpoint
12258 expression_up excep_cond_expr
;
12261 /* An instance of this type is used to represent an Ada catchpoint. */
12263 struct ada_catchpoint
: public breakpoint
12265 explicit ada_catchpoint (enum ada_exception_catchpoint_kind kind
)
12270 /* The name of the specific exception the user specified. */
12271 std::string excep_string
;
12273 /* What kind of catchpoint this is. */
12274 enum ada_exception_catchpoint_kind m_kind
;
12277 /* Parse the exception condition string in the context of each of the
12278 catchpoint's locations, and store them for later evaluation. */
12281 create_excep_cond_exprs (struct ada_catchpoint
*c
,
12282 enum ada_exception_catchpoint_kind ex
)
12284 struct bp_location
*bl
;
12286 /* Nothing to do if there's no specific exception to catch. */
12287 if (c
->excep_string
.empty ())
12290 /* Same if there are no locations... */
12291 if (c
->loc
== NULL
)
12294 /* Compute the condition expression in text form, from the specific
12295 expection we want to catch. */
12296 std::string cond_string
12297 = ada_exception_catchpoint_cond_string (c
->excep_string
.c_str (), ex
);
12299 /* Iterate over all the catchpoint's locations, and parse an
12300 expression for each. */
12301 for (bl
= c
->loc
; bl
!= NULL
; bl
= bl
->next
)
12303 struct ada_catchpoint_location
*ada_loc
12304 = (struct ada_catchpoint_location
*) bl
;
12307 if (!bl
->shlib_disabled
)
12311 s
= cond_string
.c_str ();
12314 exp
= parse_exp_1 (&s
, bl
->address
,
12315 block_for_pc (bl
->address
),
12318 catch (const gdb_exception_error
&e
)
12320 warning (_("failed to reevaluate internal exception condition "
12321 "for catchpoint %d: %s"),
12322 c
->number
, e
.what ());
12326 ada_loc
->excep_cond_expr
= std::move (exp
);
12330 /* Implement the ALLOCATE_LOCATION method in the breakpoint_ops
12331 structure for all exception catchpoint kinds. */
12333 static struct bp_location
*
12334 allocate_location_exception (struct breakpoint
*self
)
12336 return new ada_catchpoint_location (self
);
12339 /* Implement the RE_SET method in the breakpoint_ops structure for all
12340 exception catchpoint kinds. */
12343 re_set_exception (struct breakpoint
*b
)
12345 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) b
;
12347 /* Call the base class's method. This updates the catchpoint's
12349 bkpt_breakpoint_ops
.re_set (b
);
12351 /* Reparse the exception conditional expressions. One for each
12353 create_excep_cond_exprs (c
, c
->m_kind
);
12356 /* Returns true if we should stop for this breakpoint hit. If the
12357 user specified a specific exception, we only want to cause a stop
12358 if the program thrown that exception. */
12361 should_stop_exception (const struct bp_location
*bl
)
12363 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) bl
->owner
;
12364 const struct ada_catchpoint_location
*ada_loc
12365 = (const struct ada_catchpoint_location
*) bl
;
12368 struct internalvar
*var
= lookup_internalvar ("_ada_exception");
12369 if (c
->m_kind
== ada_catch_assert
)
12370 clear_internalvar (var
);
12377 if (c
->m_kind
== ada_catch_handlers
)
12378 expr
= ("GNAT_GCC_exception_Access(gcc_exception)"
12379 ".all.occurrence.id");
12383 struct value
*exc
= parse_and_eval (expr
);
12384 set_internalvar (var
, exc
);
12386 catch (const gdb_exception_error
&ex
)
12388 clear_internalvar (var
);
12392 /* With no specific exception, should always stop. */
12393 if (c
->excep_string
.empty ())
12396 if (ada_loc
->excep_cond_expr
== NULL
)
12398 /* We will have a NULL expression if back when we were creating
12399 the expressions, this location's had failed to parse. */
12406 struct value
*mark
;
12408 mark
= value_mark ();
12409 stop
= value_true (evaluate_expression (ada_loc
->excep_cond_expr
.get ()));
12410 value_free_to_mark (mark
);
12412 catch (const gdb_exception
&ex
)
12414 exception_fprintf (gdb_stderr
, ex
,
12415 _("Error in testing exception condition:\n"));
12421 /* Implement the CHECK_STATUS method in the breakpoint_ops structure
12422 for all exception catchpoint kinds. */
12425 check_status_exception (bpstat bs
)
12427 bs
->stop
= should_stop_exception (bs
->bp_location_at
);
12430 /* Implement the PRINT_IT method in the breakpoint_ops structure
12431 for all exception catchpoint kinds. */
12433 static enum print_stop_action
12434 print_it_exception (bpstat bs
)
12436 struct ui_out
*uiout
= current_uiout
;
12437 struct breakpoint
*b
= bs
->breakpoint_at
;
12439 annotate_catchpoint (b
->number
);
12441 if (uiout
->is_mi_like_p ())
12443 uiout
->field_string ("reason",
12444 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT
));
12445 uiout
->field_string ("disp", bpdisp_text (b
->disposition
));
12448 uiout
->text (b
->disposition
== disp_del
12449 ? "\nTemporary catchpoint " : "\nCatchpoint ");
12450 uiout
->field_signed ("bkptno", b
->number
);
12451 uiout
->text (", ");
12453 /* ada_exception_name_addr relies on the selected frame being the
12454 current frame. Need to do this here because this function may be
12455 called more than once when printing a stop, and below, we'll
12456 select the first frame past the Ada run-time (see
12457 ada_find_printable_frame). */
12458 select_frame (get_current_frame ());
12460 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) b
;
12463 case ada_catch_exception
:
12464 case ada_catch_exception_unhandled
:
12465 case ada_catch_handlers
:
12467 const CORE_ADDR addr
= ada_exception_name_addr (c
->m_kind
, b
);
12468 char exception_name
[256];
12472 read_memory (addr
, (gdb_byte
*) exception_name
,
12473 sizeof (exception_name
) - 1);
12474 exception_name
[sizeof (exception_name
) - 1] = '\0';
12478 /* For some reason, we were unable to read the exception
12479 name. This could happen if the Runtime was compiled
12480 without debugging info, for instance. In that case,
12481 just replace the exception name by the generic string
12482 "exception" - it will read as "an exception" in the
12483 notification we are about to print. */
12484 memcpy (exception_name
, "exception", sizeof ("exception"));
12486 /* In the case of unhandled exception breakpoints, we print
12487 the exception name as "unhandled EXCEPTION_NAME", to make
12488 it clearer to the user which kind of catchpoint just got
12489 hit. We used ui_out_text to make sure that this extra
12490 info does not pollute the exception name in the MI case. */
12491 if (c
->m_kind
== ada_catch_exception_unhandled
)
12492 uiout
->text ("unhandled ");
12493 uiout
->field_string ("exception-name", exception_name
);
12496 case ada_catch_assert
:
12497 /* In this case, the name of the exception is not really
12498 important. Just print "failed assertion" to make it clearer
12499 that his program just hit an assertion-failure catchpoint.
12500 We used ui_out_text because this info does not belong in
12502 uiout
->text ("failed assertion");
12506 gdb::unique_xmalloc_ptr
<char> exception_message
= ada_exception_message ();
12507 if (exception_message
!= NULL
)
12509 uiout
->text (" (");
12510 uiout
->field_string ("exception-message", exception_message
.get ());
12514 uiout
->text (" at ");
12515 ada_find_printable_frame (get_current_frame ());
12517 return PRINT_SRC_AND_LOC
;
12520 /* Implement the PRINT_ONE method in the breakpoint_ops structure
12521 for all exception catchpoint kinds. */
12524 print_one_exception (struct breakpoint
*b
, struct bp_location
**last_loc
)
12526 struct ui_out
*uiout
= current_uiout
;
12527 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) b
;
12528 struct value_print_options opts
;
12530 get_user_print_options (&opts
);
12532 if (opts
.addressprint
)
12533 uiout
->field_skip ("addr");
12535 annotate_field (5);
12538 case ada_catch_exception
:
12539 if (!c
->excep_string
.empty ())
12541 std::string msg
= string_printf (_("`%s' Ada exception"),
12542 c
->excep_string
.c_str ());
12544 uiout
->field_string ("what", msg
);
12547 uiout
->field_string ("what", "all Ada exceptions");
12551 case ada_catch_exception_unhandled
:
12552 uiout
->field_string ("what", "unhandled Ada exceptions");
12555 case ada_catch_handlers
:
12556 if (!c
->excep_string
.empty ())
12558 uiout
->field_fmt ("what",
12559 _("`%s' Ada exception handlers"),
12560 c
->excep_string
.c_str ());
12563 uiout
->field_string ("what", "all Ada exceptions handlers");
12566 case ada_catch_assert
:
12567 uiout
->field_string ("what", "failed Ada assertions");
12571 internal_error (__FILE__
, __LINE__
, _("unexpected catchpoint type"));
12576 /* Implement the PRINT_MENTION method in the breakpoint_ops structure
12577 for all exception catchpoint kinds. */
12580 print_mention_exception (struct breakpoint
*b
)
12582 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) b
;
12583 struct ui_out
*uiout
= current_uiout
;
12585 uiout
->text (b
->disposition
== disp_del
? _("Temporary catchpoint ")
12586 : _("Catchpoint "));
12587 uiout
->field_signed ("bkptno", b
->number
);
12588 uiout
->text (": ");
12592 case ada_catch_exception
:
12593 if (!c
->excep_string
.empty ())
12595 std::string info
= string_printf (_("`%s' Ada exception"),
12596 c
->excep_string
.c_str ());
12597 uiout
->text (info
.c_str ());
12600 uiout
->text (_("all Ada exceptions"));
12603 case ada_catch_exception_unhandled
:
12604 uiout
->text (_("unhandled Ada exceptions"));
12607 case ada_catch_handlers
:
12608 if (!c
->excep_string
.empty ())
12611 = string_printf (_("`%s' Ada exception handlers"),
12612 c
->excep_string
.c_str ());
12613 uiout
->text (info
.c_str ());
12616 uiout
->text (_("all Ada exceptions handlers"));
12619 case ada_catch_assert
:
12620 uiout
->text (_("failed Ada assertions"));
12624 internal_error (__FILE__
, __LINE__
, _("unexpected catchpoint type"));
12629 /* Implement the PRINT_RECREATE method in the breakpoint_ops structure
12630 for all exception catchpoint kinds. */
12633 print_recreate_exception (struct breakpoint
*b
, struct ui_file
*fp
)
12635 struct ada_catchpoint
*c
= (struct ada_catchpoint
*) b
;
12639 case ada_catch_exception
:
12640 fprintf_filtered (fp
, "catch exception");
12641 if (!c
->excep_string
.empty ())
12642 fprintf_filtered (fp
, " %s", c
->excep_string
.c_str ());
12645 case ada_catch_exception_unhandled
:
12646 fprintf_filtered (fp
, "catch exception unhandled");
12649 case ada_catch_handlers
:
12650 fprintf_filtered (fp
, "catch handlers");
12653 case ada_catch_assert
:
12654 fprintf_filtered (fp
, "catch assert");
12658 internal_error (__FILE__
, __LINE__
, _("unexpected catchpoint type"));
12660 print_recreate_thread (b
, fp
);
12663 /* Virtual tables for various breakpoint types. */
12664 static struct breakpoint_ops catch_exception_breakpoint_ops
;
12665 static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops
;
12666 static struct breakpoint_ops catch_assert_breakpoint_ops
;
12667 static struct breakpoint_ops catch_handlers_breakpoint_ops
;
12669 /* See ada-lang.h. */
12672 is_ada_exception_catchpoint (breakpoint
*bp
)
12674 return (bp
->ops
== &catch_exception_breakpoint_ops
12675 || bp
->ops
== &catch_exception_unhandled_breakpoint_ops
12676 || bp
->ops
== &catch_assert_breakpoint_ops
12677 || bp
->ops
== &catch_handlers_breakpoint_ops
);
12680 /* Split the arguments specified in a "catch exception" command.
12681 Set EX to the appropriate catchpoint type.
12682 Set EXCEP_STRING to the name of the specific exception if
12683 specified by the user.
12684 IS_CATCH_HANDLERS_CMD: True if the arguments are for a
12685 "catch handlers" command. False otherwise.
12686 If a condition is found at the end of the arguments, the condition
12687 expression is stored in COND_STRING (memory must be deallocated
12688 after use). Otherwise COND_STRING is set to NULL. */
12691 catch_ada_exception_command_split (const char *args
,
12692 bool is_catch_handlers_cmd
,
12693 enum ada_exception_catchpoint_kind
*ex
,
12694 std::string
*excep_string
,
12695 std::string
*cond_string
)
12697 std::string exception_name
;
12699 exception_name
= extract_arg (&args
);
12700 if (exception_name
== "if")
12702 /* This is not an exception name; this is the start of a condition
12703 expression for a catchpoint on all exceptions. So, "un-get"
12704 this token, and set exception_name to NULL. */
12705 exception_name
.clear ();
12709 /* Check to see if we have a condition. */
12711 args
= skip_spaces (args
);
12712 if (startswith (args
, "if")
12713 && (isspace (args
[2]) || args
[2] == '\0'))
12716 args
= skip_spaces (args
);
12718 if (args
[0] == '\0')
12719 error (_("Condition missing after `if' keyword"));
12720 *cond_string
= args
;
12722 args
+= strlen (args
);
12725 /* Check that we do not have any more arguments. Anything else
12728 if (args
[0] != '\0')
12729 error (_("Junk at end of expression"));
12731 if (is_catch_handlers_cmd
)
12733 /* Catch handling of exceptions. */
12734 *ex
= ada_catch_handlers
;
12735 *excep_string
= exception_name
;
12737 else if (exception_name
.empty ())
12739 /* Catch all exceptions. */
12740 *ex
= ada_catch_exception
;
12741 excep_string
->clear ();
12743 else if (exception_name
== "unhandled")
12745 /* Catch unhandled exceptions. */
12746 *ex
= ada_catch_exception_unhandled
;
12747 excep_string
->clear ();
12751 /* Catch a specific exception. */
12752 *ex
= ada_catch_exception
;
12753 *excep_string
= exception_name
;
12757 /* Return the name of the symbol on which we should break in order to
12758 implement a catchpoint of the EX kind. */
12760 static const char *
12761 ada_exception_sym_name (enum ada_exception_catchpoint_kind ex
)
12763 struct ada_inferior_data
*data
= get_ada_inferior_data (current_inferior ());
12765 gdb_assert (data
->exception_info
!= NULL
);
12769 case ada_catch_exception
:
12770 return (data
->exception_info
->catch_exception_sym
);
12772 case ada_catch_exception_unhandled
:
12773 return (data
->exception_info
->catch_exception_unhandled_sym
);
12775 case ada_catch_assert
:
12776 return (data
->exception_info
->catch_assert_sym
);
12778 case ada_catch_handlers
:
12779 return (data
->exception_info
->catch_handlers_sym
);
12782 internal_error (__FILE__
, __LINE__
,
12783 _("unexpected catchpoint kind (%d)"), ex
);
12787 /* Return the breakpoint ops "virtual table" used for catchpoints
12790 static const struct breakpoint_ops
*
12791 ada_exception_breakpoint_ops (enum ada_exception_catchpoint_kind ex
)
12795 case ada_catch_exception
:
12796 return (&catch_exception_breakpoint_ops
);
12798 case ada_catch_exception_unhandled
:
12799 return (&catch_exception_unhandled_breakpoint_ops
);
12801 case ada_catch_assert
:
12802 return (&catch_assert_breakpoint_ops
);
12804 case ada_catch_handlers
:
12805 return (&catch_handlers_breakpoint_ops
);
12808 internal_error (__FILE__
, __LINE__
,
12809 _("unexpected catchpoint kind (%d)"), ex
);
12813 /* Return the condition that will be used to match the current exception
12814 being raised with the exception that the user wants to catch. This
12815 assumes that this condition is used when the inferior just triggered
12816 an exception catchpoint.
12817 EX: the type of catchpoints used for catching Ada exceptions. */
12820 ada_exception_catchpoint_cond_string (const char *excep_string
,
12821 enum ada_exception_catchpoint_kind ex
)
12824 bool is_standard_exc
= false;
12825 std::string result
;
12827 if (ex
== ada_catch_handlers
)
12829 /* For exception handlers catchpoints, the condition string does
12830 not use the same parameter as for the other exceptions. */
12831 result
= ("long_integer (GNAT_GCC_exception_Access"
12832 "(gcc_exception).all.occurrence.id)");
12835 result
= "long_integer (e)";
12837 /* The standard exceptions are a special case. They are defined in
12838 runtime units that have been compiled without debugging info; if
12839 EXCEP_STRING is the not-fully-qualified name of a standard
12840 exception (e.g. "constraint_error") then, during the evaluation
12841 of the condition expression, the symbol lookup on this name would
12842 *not* return this standard exception. The catchpoint condition
12843 may then be set only on user-defined exceptions which have the
12844 same not-fully-qualified name (e.g. my_package.constraint_error).
12846 To avoid this unexcepted behavior, these standard exceptions are
12847 systematically prefixed by "standard". This means that "catch
12848 exception constraint_error" is rewritten into "catch exception
12849 standard.constraint_error".
12851 If an exception named constraint_error is defined in another package of
12852 the inferior program, then the only way to specify this exception as a
12853 breakpoint condition is to use its fully-qualified named:
12854 e.g. my_package.constraint_error. */
12856 for (i
= 0; i
< sizeof (standard_exc
) / sizeof (char *); i
++)
12858 if (strcmp (standard_exc
[i
], excep_string
) == 0)
12860 is_standard_exc
= true;
12867 if (is_standard_exc
)
12868 string_appendf (result
, "long_integer (&standard.%s)", excep_string
);
12870 string_appendf (result
, "long_integer (&%s)", excep_string
);
12875 /* Return the symtab_and_line that should be used to insert an exception
12876 catchpoint of the TYPE kind.
12878 ADDR_STRING returns the name of the function where the real
12879 breakpoint that implements the catchpoints is set, depending on the
12880 type of catchpoint we need to create. */
12882 static struct symtab_and_line
12883 ada_exception_sal (enum ada_exception_catchpoint_kind ex
,
12884 std::string
*addr_string
, const struct breakpoint_ops
**ops
)
12886 const char *sym_name
;
12887 struct symbol
*sym
;
12889 /* First, find out which exception support info to use. */
12890 ada_exception_support_info_sniffer ();
12892 /* Then lookup the function on which we will break in order to catch
12893 the Ada exceptions requested by the user. */
12894 sym_name
= ada_exception_sym_name (ex
);
12895 sym
= standard_lookup (sym_name
, NULL
, VAR_DOMAIN
);
12898 error (_("Catchpoint symbol not found: %s"), sym_name
);
12900 if (SYMBOL_CLASS (sym
) != LOC_BLOCK
)
12901 error (_("Unable to insert catchpoint. %s is not a function."), sym_name
);
12903 /* Set ADDR_STRING. */
12904 *addr_string
= sym_name
;
12907 *ops
= ada_exception_breakpoint_ops (ex
);
12909 return find_function_start_sal (sym
, 1);
12912 /* Create an Ada exception catchpoint.
12914 EX_KIND is the kind of exception catchpoint to be created.
12916 If EXCEPT_STRING is empty, this catchpoint is expected to trigger
12917 for all exceptions. Otherwise, EXCEPT_STRING indicates the name
12918 of the exception to which this catchpoint applies.
12920 COND_STRING, if not empty, is the catchpoint condition.
12922 TEMPFLAG, if nonzero, means that the underlying breakpoint
12923 should be temporary.
12925 FROM_TTY is the usual argument passed to all commands implementations. */
12928 create_ada_exception_catchpoint (struct gdbarch
*gdbarch
,
12929 enum ada_exception_catchpoint_kind ex_kind
,
12930 const std::string
&excep_string
,
12931 const std::string
&cond_string
,
12936 std::string addr_string
;
12937 const struct breakpoint_ops
*ops
= NULL
;
12938 struct symtab_and_line sal
= ada_exception_sal (ex_kind
, &addr_string
, &ops
);
12940 std::unique_ptr
<ada_catchpoint
> c (new ada_catchpoint (ex_kind
));
12941 init_ada_exception_breakpoint (c
.get (), gdbarch
, sal
, addr_string
.c_str (),
12942 ops
, tempflag
, disabled
, from_tty
);
12943 c
->excep_string
= excep_string
;
12944 create_excep_cond_exprs (c
.get (), ex_kind
);
12945 if (!cond_string
.empty ())
12946 set_breakpoint_condition (c
.get (), cond_string
.c_str (), from_tty
);
12947 install_breakpoint (0, std::move (c
), 1);
12950 /* Implement the "catch exception" command. */
12953 catch_ada_exception_command (const char *arg_entry
, int from_tty
,
12954 struct cmd_list_element
*command
)
12956 const char *arg
= arg_entry
;
12957 struct gdbarch
*gdbarch
= get_current_arch ();
12959 enum ada_exception_catchpoint_kind ex_kind
;
12960 std::string excep_string
;
12961 std::string cond_string
;
12963 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
12967 catch_ada_exception_command_split (arg
, false, &ex_kind
, &excep_string
,
12969 create_ada_exception_catchpoint (gdbarch
, ex_kind
,
12970 excep_string
, cond_string
,
12971 tempflag
, 1 /* enabled */,
12975 /* Implement the "catch handlers" command. */
12978 catch_ada_handlers_command (const char *arg_entry
, int from_tty
,
12979 struct cmd_list_element
*command
)
12981 const char *arg
= arg_entry
;
12982 struct gdbarch
*gdbarch
= get_current_arch ();
12984 enum ada_exception_catchpoint_kind ex_kind
;
12985 std::string excep_string
;
12986 std::string cond_string
;
12988 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
12992 catch_ada_exception_command_split (arg
, true, &ex_kind
, &excep_string
,
12994 create_ada_exception_catchpoint (gdbarch
, ex_kind
,
12995 excep_string
, cond_string
,
12996 tempflag
, 1 /* enabled */,
13000 /* Completion function for the Ada "catch" commands. */
13003 catch_ada_completer (struct cmd_list_element
*cmd
, completion_tracker
&tracker
,
13004 const char *text
, const char *word
)
13006 std::vector
<ada_exc_info
> exceptions
= ada_exceptions_list (NULL
);
13008 for (const ada_exc_info
&info
: exceptions
)
13010 if (startswith (info
.name
, word
))
13011 tracker
.add_completion (make_unique_xstrdup (info
.name
));
13015 /* Split the arguments specified in a "catch assert" command.
13017 ARGS contains the command's arguments (or the empty string if
13018 no arguments were passed).
13020 If ARGS contains a condition, set COND_STRING to that condition
13021 (the memory needs to be deallocated after use). */
13024 catch_ada_assert_command_split (const char *args
, std::string
&cond_string
)
13026 args
= skip_spaces (args
);
13028 /* Check whether a condition was provided. */
13029 if (startswith (args
, "if")
13030 && (isspace (args
[2]) || args
[2] == '\0'))
13033 args
= skip_spaces (args
);
13034 if (args
[0] == '\0')
13035 error (_("condition missing after `if' keyword"));
13036 cond_string
.assign (args
);
13039 /* Otherwise, there should be no other argument at the end of
13041 else if (args
[0] != '\0')
13042 error (_("Junk at end of arguments."));
13045 /* Implement the "catch assert" command. */
13048 catch_assert_command (const char *arg_entry
, int from_tty
,
13049 struct cmd_list_element
*command
)
13051 const char *arg
= arg_entry
;
13052 struct gdbarch
*gdbarch
= get_current_arch ();
13054 std::string cond_string
;
13056 tempflag
= get_cmd_context (command
) == CATCH_TEMPORARY
;
13060 catch_ada_assert_command_split (arg
, cond_string
);
13061 create_ada_exception_catchpoint (gdbarch
, ada_catch_assert
,
13063 tempflag
, 1 /* enabled */,
13067 /* Return non-zero if the symbol SYM is an Ada exception object. */
13070 ada_is_exception_sym (struct symbol
*sym
)
13072 const char *type_name
= SYMBOL_TYPE (sym
)->name ();
13074 return (SYMBOL_CLASS (sym
) != LOC_TYPEDEF
13075 && SYMBOL_CLASS (sym
) != LOC_BLOCK
13076 && SYMBOL_CLASS (sym
) != LOC_CONST
13077 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
13078 && type_name
!= NULL
&& strcmp (type_name
, "exception") == 0);
13081 /* Given a global symbol SYM, return non-zero iff SYM is a non-standard
13082 Ada exception object. This matches all exceptions except the ones
13083 defined by the Ada language. */
13086 ada_is_non_standard_exception_sym (struct symbol
*sym
)
13090 if (!ada_is_exception_sym (sym
))
13093 for (i
= 0; i
< ARRAY_SIZE (standard_exc
); i
++)
13094 if (strcmp (sym
->linkage_name (), standard_exc
[i
]) == 0)
13095 return 0; /* A standard exception. */
13097 /* Numeric_Error is also a standard exception, so exclude it.
13098 See the STANDARD_EXC description for more details as to why
13099 this exception is not listed in that array. */
13100 if (strcmp (sym
->linkage_name (), "numeric_error") == 0)
13106 /* A helper function for std::sort, comparing two struct ada_exc_info
13109 The comparison is determined first by exception name, and then
13110 by exception address. */
13113 ada_exc_info::operator< (const ada_exc_info
&other
) const
13117 result
= strcmp (name
, other
.name
);
13120 if (result
== 0 && addr
< other
.addr
)
13126 ada_exc_info::operator== (const ada_exc_info
&other
) const
13128 return addr
== other
.addr
&& strcmp (name
, other
.name
) == 0;
13131 /* Sort EXCEPTIONS using compare_ada_exception_info as the comparison
13132 routine, but keeping the first SKIP elements untouched.
13134 All duplicates are also removed. */
13137 sort_remove_dups_ada_exceptions_list (std::vector
<ada_exc_info
> *exceptions
,
13140 std::sort (exceptions
->begin () + skip
, exceptions
->end ());
13141 exceptions
->erase (std::unique (exceptions
->begin () + skip
, exceptions
->end ()),
13142 exceptions
->end ());
13145 /* Add all exceptions defined by the Ada standard whose name match
13146 a regular expression.
13148 If PREG is not NULL, then this regexp_t object is used to
13149 perform the symbol name matching. Otherwise, no name-based
13150 filtering is performed.
13152 EXCEPTIONS is a vector of exceptions to which matching exceptions
13156 ada_add_standard_exceptions (compiled_regex
*preg
,
13157 std::vector
<ada_exc_info
> *exceptions
)
13161 for (i
= 0; i
< ARRAY_SIZE (standard_exc
); i
++)
13164 || preg
->exec (standard_exc
[i
], 0, NULL
, 0) == 0)
13166 struct bound_minimal_symbol msymbol
13167 = ada_lookup_simple_minsym (standard_exc
[i
]);
13169 if (msymbol
.minsym
!= NULL
)
13171 struct ada_exc_info info
13172 = {standard_exc
[i
], BMSYMBOL_VALUE_ADDRESS (msymbol
)};
13174 exceptions
->push_back (info
);
13180 /* Add all Ada exceptions defined locally and accessible from the given
13183 If PREG is not NULL, then this regexp_t object is used to
13184 perform the symbol name matching. Otherwise, no name-based
13185 filtering is performed.
13187 EXCEPTIONS is a vector of exceptions to which matching exceptions
13191 ada_add_exceptions_from_frame (compiled_regex
*preg
,
13192 struct frame_info
*frame
,
13193 std::vector
<ada_exc_info
> *exceptions
)
13195 const struct block
*block
= get_frame_block (frame
, 0);
13199 struct block_iterator iter
;
13200 struct symbol
*sym
;
13202 ALL_BLOCK_SYMBOLS (block
, iter
, sym
)
13204 switch (SYMBOL_CLASS (sym
))
13211 if (ada_is_exception_sym (sym
))
13213 struct ada_exc_info info
= {sym
->print_name (),
13214 SYMBOL_VALUE_ADDRESS (sym
)};
13216 exceptions
->push_back (info
);
13220 if (BLOCK_FUNCTION (block
) != NULL
)
13222 block
= BLOCK_SUPERBLOCK (block
);
13226 /* Return true if NAME matches PREG or if PREG is NULL. */
13229 name_matches_regex (const char *name
, compiled_regex
*preg
)
13231 return (preg
== NULL
13232 || preg
->exec (ada_decode (name
).c_str (), 0, NULL
, 0) == 0);
13235 /* Add all exceptions defined globally whose name name match
13236 a regular expression, excluding standard exceptions.
13238 The reason we exclude standard exceptions is that they need
13239 to be handled separately: Standard exceptions are defined inside
13240 a runtime unit which is normally not compiled with debugging info,
13241 and thus usually do not show up in our symbol search. However,
13242 if the unit was in fact built with debugging info, we need to
13243 exclude them because they would duplicate the entry we found
13244 during the special loop that specifically searches for those
13245 standard exceptions.
13247 If PREG is not NULL, then this regexp_t object is used to
13248 perform the symbol name matching. Otherwise, no name-based
13249 filtering is performed.
13251 EXCEPTIONS is a vector of exceptions to which matching exceptions
13255 ada_add_global_exceptions (compiled_regex
*preg
,
13256 std::vector
<ada_exc_info
> *exceptions
)
13258 /* In Ada, the symbol "search name" is a linkage name, whereas the
13259 regular expression used to do the matching refers to the natural
13260 name. So match against the decoded name. */
13261 expand_symtabs_matching (NULL
,
13262 lookup_name_info::match_any (),
13263 [&] (const char *search_name
)
13265 std::string decoded
= ada_decode (search_name
);
13266 return name_matches_regex (decoded
.c_str (), preg
);
13271 for (objfile
*objfile
: current_program_space
->objfiles ())
13273 for (compunit_symtab
*s
: objfile
->compunits ())
13275 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (s
);
13278 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
13280 const struct block
*b
= BLOCKVECTOR_BLOCK (bv
, i
);
13281 struct block_iterator iter
;
13282 struct symbol
*sym
;
13284 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
13285 if (ada_is_non_standard_exception_sym (sym
)
13286 && name_matches_regex (sym
->natural_name (), preg
))
13288 struct ada_exc_info info
13289 = {sym
->print_name (), SYMBOL_VALUE_ADDRESS (sym
)};
13291 exceptions
->push_back (info
);
13298 /* Implements ada_exceptions_list with the regular expression passed
13299 as a regex_t, rather than a string.
13301 If not NULL, PREG is used to filter out exceptions whose names
13302 do not match. Otherwise, all exceptions are listed. */
13304 static std::vector
<ada_exc_info
>
13305 ada_exceptions_list_1 (compiled_regex
*preg
)
13307 std::vector
<ada_exc_info
> result
;
13310 /* First, list the known standard exceptions. These exceptions
13311 need to be handled separately, as they are usually defined in
13312 runtime units that have been compiled without debugging info. */
13314 ada_add_standard_exceptions (preg
, &result
);
13316 /* Next, find all exceptions whose scope is local and accessible
13317 from the currently selected frame. */
13319 if (has_stack_frames ())
13321 prev_len
= result
.size ();
13322 ada_add_exceptions_from_frame (preg
, get_selected_frame (NULL
),
13324 if (result
.size () > prev_len
)
13325 sort_remove_dups_ada_exceptions_list (&result
, prev_len
);
13328 /* Add all exceptions whose scope is global. */
13330 prev_len
= result
.size ();
13331 ada_add_global_exceptions (preg
, &result
);
13332 if (result
.size () > prev_len
)
13333 sort_remove_dups_ada_exceptions_list (&result
, prev_len
);
13338 /* Return a vector of ada_exc_info.
13340 If REGEXP is NULL, all exceptions are included in the result.
13341 Otherwise, it should contain a valid regular expression,
13342 and only the exceptions whose names match that regular expression
13343 are included in the result.
13345 The exceptions are sorted in the following order:
13346 - Standard exceptions (defined by the Ada language), in
13347 alphabetical order;
13348 - Exceptions only visible from the current frame, in
13349 alphabetical order;
13350 - Exceptions whose scope is global, in alphabetical order. */
13352 std::vector
<ada_exc_info
>
13353 ada_exceptions_list (const char *regexp
)
13355 if (regexp
== NULL
)
13356 return ada_exceptions_list_1 (NULL
);
13358 compiled_regex
reg (regexp
, REG_NOSUB
, _("invalid regular expression"));
13359 return ada_exceptions_list_1 (®
);
13362 /* Implement the "info exceptions" command. */
13365 info_exceptions_command (const char *regexp
, int from_tty
)
13367 struct gdbarch
*gdbarch
= get_current_arch ();
13369 std::vector
<ada_exc_info
> exceptions
= ada_exceptions_list (regexp
);
13371 if (regexp
!= NULL
)
13373 (_("All Ada exceptions matching regular expression \"%s\":\n"), regexp
);
13375 printf_filtered (_("All defined Ada exceptions:\n"));
13377 for (const ada_exc_info
&info
: exceptions
)
13378 printf_filtered ("%s: %s\n", info
.name
, paddress (gdbarch
, info
.addr
));
13382 /* Information about operators given special treatment in functions
13384 /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */
13386 #define ADA_OPERATORS \
13387 OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \
13388 OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \
13389 OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \
13390 OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \
13391 OP_DEFN (OP_ATR_LAST, 1, 2, 0) \
13392 OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \
13393 OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \
13394 OP_DEFN (OP_ATR_MAX, 1, 3, 0) \
13395 OP_DEFN (OP_ATR_MIN, 1, 3, 0) \
13396 OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \
13397 OP_DEFN (OP_ATR_POS, 1, 2, 0) \
13398 OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \
13399 OP_DEFN (OP_ATR_TAG, 1, 1, 0) \
13400 OP_DEFN (OP_ATR_VAL, 1, 2, 0) \
13401 OP_DEFN (UNOP_QUAL, 3, 1, 0) \
13402 OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \
13403 OP_DEFN (OP_OTHERS, 1, 1, 0) \
13404 OP_DEFN (OP_POSITIONAL, 3, 1, 0) \
13405 OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0)
13408 ada_operator_length (const struct expression
*exp
, int pc
, int *oplenp
,
13411 switch (exp
->elts
[pc
- 1].opcode
)
13414 operator_length_standard (exp
, pc
, oplenp
, argsp
);
13417 #define OP_DEFN(op, len, args, binop) \
13418 case op: *oplenp = len; *argsp = args; break;
13424 *argsp
= longest_to_int (exp
->elts
[pc
- 2].longconst
);
13429 *argsp
= longest_to_int (exp
->elts
[pc
- 2].longconst
) + 1;
13434 /* Implementation of the exp_descriptor method operator_check. */
13437 ada_operator_check (struct expression
*exp
, int pos
,
13438 int (*objfile_func
) (struct objfile
*objfile
, void *data
),
13441 const union exp_element
*const elts
= exp
->elts
;
13442 struct type
*type
= NULL
;
13444 switch (elts
[pos
].opcode
)
13446 case UNOP_IN_RANGE
:
13448 type
= elts
[pos
+ 1].type
;
13452 return operator_check_standard (exp
, pos
, objfile_func
, data
);
13455 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
13457 if (type
&& TYPE_OBJFILE (type
)
13458 && (*objfile_func
) (TYPE_OBJFILE (type
), data
))
13464 static const char *
13465 ada_op_name (enum exp_opcode opcode
)
13470 return op_name_standard (opcode
);
13472 #define OP_DEFN(op, len, args, binop) case op: return #op;
13477 return "OP_AGGREGATE";
13479 return "OP_CHOICES";
13485 /* As for operator_length, but assumes PC is pointing at the first
13486 element of the operator, and gives meaningful results only for the
13487 Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */
13490 ada_forward_operator_length (struct expression
*exp
, int pc
,
13491 int *oplenp
, int *argsp
)
13493 switch (exp
->elts
[pc
].opcode
)
13496 *oplenp
= *argsp
= 0;
13499 #define OP_DEFN(op, len, args, binop) \
13500 case op: *oplenp = len; *argsp = args; break;
13506 *argsp
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
13511 *argsp
= longest_to_int (exp
->elts
[pc
+ 1].longconst
) + 1;
13517 int len
= longest_to_int (exp
->elts
[pc
+ 1].longconst
);
13519 *oplenp
= 4 + BYTES_TO_EXP_ELEM (len
+ 1);
13527 ada_dump_subexp_body (struct expression
*exp
, struct ui_file
*stream
, int elt
)
13529 enum exp_opcode op
= exp
->elts
[elt
].opcode
;
13534 ada_forward_operator_length (exp
, elt
, &oplen
, &nargs
);
13538 /* Ada attributes ('Foo). */
13541 case OP_ATR_LENGTH
:
13545 case OP_ATR_MODULUS
:
13552 case UNOP_IN_RANGE
:
13554 /* XXX: gdb_sprint_host_address, type_sprint */
13555 fprintf_filtered (stream
, _("Type @"));
13556 gdb_print_host_address (exp
->elts
[pc
+ 1].type
, stream
);
13557 fprintf_filtered (stream
, " (");
13558 type_print (exp
->elts
[pc
+ 1].type
, NULL
, stream
, 0);
13559 fprintf_filtered (stream
, ")");
13561 case BINOP_IN_BOUNDS
:
13562 fprintf_filtered (stream
, " (%d)",
13563 longest_to_int (exp
->elts
[pc
+ 2].longconst
));
13565 case TERNOP_IN_RANGE
:
13570 case OP_DISCRETE_RANGE
:
13571 case OP_POSITIONAL
:
13578 char *name
= &exp
->elts
[elt
+ 2].string
;
13579 int len
= longest_to_int (exp
->elts
[elt
+ 1].longconst
);
13581 fprintf_filtered (stream
, "Text: `%.*s'", len
, name
);
13586 return dump_subexp_body_standard (exp
, stream
, elt
);
13590 for (i
= 0; i
< nargs
; i
+= 1)
13591 elt
= dump_subexp (exp
, stream
, elt
);
13596 /* The Ada extension of print_subexp (q.v.). */
13599 ada_print_subexp (struct expression
*exp
, int *pos
,
13600 struct ui_file
*stream
, enum precedence prec
)
13602 int oplen
, nargs
, i
;
13604 enum exp_opcode op
= exp
->elts
[pc
].opcode
;
13606 ada_forward_operator_length (exp
, pc
, &oplen
, &nargs
);
13613 print_subexp_standard (exp
, pos
, stream
, prec
);
13617 fputs_filtered (exp
->elts
[pc
+ 2].symbol
->natural_name (), stream
);
13620 case BINOP_IN_BOUNDS
:
13621 /* XXX: sprint_subexp */
13622 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13623 fputs_filtered (" in ", stream
);
13624 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13625 fputs_filtered ("'range", stream
);
13626 if (exp
->elts
[pc
+ 1].longconst
> 1)
13627 fprintf_filtered (stream
, "(%ld)",
13628 (long) exp
->elts
[pc
+ 1].longconst
);
13631 case TERNOP_IN_RANGE
:
13632 if (prec
>= PREC_EQUAL
)
13633 fputs_filtered ("(", stream
);
13634 /* XXX: sprint_subexp */
13635 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13636 fputs_filtered (" in ", stream
);
13637 print_subexp (exp
, pos
, stream
, PREC_EQUAL
);
13638 fputs_filtered (" .. ", stream
);
13639 print_subexp (exp
, pos
, stream
, PREC_EQUAL
);
13640 if (prec
>= PREC_EQUAL
)
13641 fputs_filtered (")", stream
);
13646 case OP_ATR_LENGTH
:
13650 case OP_ATR_MODULUS
:
13655 if (exp
->elts
[*pos
].opcode
== OP_TYPE
)
13657 if (exp
->elts
[*pos
+ 1].type
->code () != TYPE_CODE_VOID
)
13658 LA_PRINT_TYPE (exp
->elts
[*pos
+ 1].type
, "", stream
, 0, 0,
13659 &type_print_raw_options
);
13663 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13664 fprintf_filtered (stream
, "'%s", ada_attribute_name (op
));
13669 for (tem
= 1; tem
< nargs
; tem
+= 1)
13671 fputs_filtered ((tem
== 1) ? " (" : ", ", stream
);
13672 print_subexp (exp
, pos
, stream
, PREC_ABOVE_COMMA
);
13674 fputs_filtered (")", stream
);
13679 type_print (exp
->elts
[pc
+ 1].type
, "", stream
, 0);
13680 fputs_filtered ("'(", stream
);
13681 print_subexp (exp
, pos
, stream
, PREC_PREFIX
);
13682 fputs_filtered (")", stream
);
13685 case UNOP_IN_RANGE
:
13686 /* XXX: sprint_subexp */
13687 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13688 fputs_filtered (" in ", stream
);
13689 LA_PRINT_TYPE (exp
->elts
[pc
+ 1].type
, "", stream
, 1, 0,
13690 &type_print_raw_options
);
13693 case OP_DISCRETE_RANGE
:
13694 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13695 fputs_filtered ("..", stream
);
13696 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13700 fputs_filtered ("others => ", stream
);
13701 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13705 for (i
= 0; i
< nargs
-1; i
+= 1)
13708 fputs_filtered ("|", stream
);
13709 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13711 fputs_filtered (" => ", stream
);
13712 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13715 case OP_POSITIONAL
:
13716 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13720 fputs_filtered ("(", stream
);
13721 for (i
= 0; i
< nargs
; i
+= 1)
13724 fputs_filtered (", ", stream
);
13725 print_subexp (exp
, pos
, stream
, PREC_SUFFIX
);
13727 fputs_filtered (")", stream
);
13732 /* Table mapping opcodes into strings for printing operators
13733 and precedences of the operators. */
13735 static const struct op_print ada_op_print_tab
[] = {
13736 {":=", BINOP_ASSIGN
, PREC_ASSIGN
, 1},
13737 {"or else", BINOP_LOGICAL_OR
, PREC_LOGICAL_OR
, 0},
13738 {"and then", BINOP_LOGICAL_AND
, PREC_LOGICAL_AND
, 0},
13739 {"or", BINOP_BITWISE_IOR
, PREC_BITWISE_IOR
, 0},
13740 {"xor", BINOP_BITWISE_XOR
, PREC_BITWISE_XOR
, 0},
13741 {"and", BINOP_BITWISE_AND
, PREC_BITWISE_AND
, 0},
13742 {"=", BINOP_EQUAL
, PREC_EQUAL
, 0},
13743 {"/=", BINOP_NOTEQUAL
, PREC_EQUAL
, 0},
13744 {"<=", BINOP_LEQ
, PREC_ORDER
, 0},
13745 {">=", BINOP_GEQ
, PREC_ORDER
, 0},
13746 {">", BINOP_GTR
, PREC_ORDER
, 0},
13747 {"<", BINOP_LESS
, PREC_ORDER
, 0},
13748 {">>", BINOP_RSH
, PREC_SHIFT
, 0},
13749 {"<<", BINOP_LSH
, PREC_SHIFT
, 0},
13750 {"+", BINOP_ADD
, PREC_ADD
, 0},
13751 {"-", BINOP_SUB
, PREC_ADD
, 0},
13752 {"&", BINOP_CONCAT
, PREC_ADD
, 0},
13753 {"*", BINOP_MUL
, PREC_MUL
, 0},
13754 {"/", BINOP_DIV
, PREC_MUL
, 0},
13755 {"rem", BINOP_REM
, PREC_MUL
, 0},
13756 {"mod", BINOP_MOD
, PREC_MUL
, 0},
13757 {"**", BINOP_EXP
, PREC_REPEAT
, 0},
13758 {"@", BINOP_REPEAT
, PREC_REPEAT
, 0},
13759 {"-", UNOP_NEG
, PREC_PREFIX
, 0},
13760 {"+", UNOP_PLUS
, PREC_PREFIX
, 0},
13761 {"not ", UNOP_LOGICAL_NOT
, PREC_PREFIX
, 0},
13762 {"not ", UNOP_COMPLEMENT
, PREC_PREFIX
, 0},
13763 {"abs ", UNOP_ABS
, PREC_PREFIX
, 0},
13764 {".all", UNOP_IND
, PREC_SUFFIX
, 1},
13765 {"'access", UNOP_ADDR
, PREC_SUFFIX
, 1},
13766 {"'size", OP_ATR_SIZE
, PREC_SUFFIX
, 1},
13767 {NULL
, OP_NULL
, PREC_SUFFIX
, 0}
13770 enum ada_primitive_types
{
13771 ada_primitive_type_int
,
13772 ada_primitive_type_long
,
13773 ada_primitive_type_short
,
13774 ada_primitive_type_char
,
13775 ada_primitive_type_float
,
13776 ada_primitive_type_double
,
13777 ada_primitive_type_void
,
13778 ada_primitive_type_long_long
,
13779 ada_primitive_type_long_double
,
13780 ada_primitive_type_natural
,
13781 ada_primitive_type_positive
,
13782 ada_primitive_type_system_address
,
13783 ada_primitive_type_storage_offset
,
13784 nr_ada_primitive_types
13788 ada_language_arch_info (struct gdbarch
*gdbarch
,
13789 struct language_arch_info
*lai
)
13791 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
13793 lai
->primitive_type_vector
13794 = GDBARCH_OBSTACK_CALLOC (gdbarch
, nr_ada_primitive_types
+ 1,
13797 lai
->primitive_type_vector
[ada_primitive_type_int
]
13798 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
13800 lai
->primitive_type_vector
[ada_primitive_type_long
]
13801 = arch_integer_type (gdbarch
, gdbarch_long_bit (gdbarch
),
13802 0, "long_integer");
13803 lai
->primitive_type_vector
[ada_primitive_type_short
]
13804 = arch_integer_type (gdbarch
, gdbarch_short_bit (gdbarch
),
13805 0, "short_integer");
13806 lai
->string_char_type
13807 = lai
->primitive_type_vector
[ada_primitive_type_char
]
13808 = arch_character_type (gdbarch
, TARGET_CHAR_BIT
, 0, "character");
13809 lai
->primitive_type_vector
[ada_primitive_type_float
]
13810 = arch_float_type (gdbarch
, gdbarch_float_bit (gdbarch
),
13811 "float", gdbarch_float_format (gdbarch
));
13812 lai
->primitive_type_vector
[ada_primitive_type_double
]
13813 = arch_float_type (gdbarch
, gdbarch_double_bit (gdbarch
),
13814 "long_float", gdbarch_double_format (gdbarch
));
13815 lai
->primitive_type_vector
[ada_primitive_type_long_long
]
13816 = arch_integer_type (gdbarch
, gdbarch_long_long_bit (gdbarch
),
13817 0, "long_long_integer");
13818 lai
->primitive_type_vector
[ada_primitive_type_long_double
]
13819 = arch_float_type (gdbarch
, gdbarch_long_double_bit (gdbarch
),
13820 "long_long_float", gdbarch_long_double_format (gdbarch
));
13821 lai
->primitive_type_vector
[ada_primitive_type_natural
]
13822 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
13824 lai
->primitive_type_vector
[ada_primitive_type_positive
]
13825 = arch_integer_type (gdbarch
, gdbarch_int_bit (gdbarch
),
13827 lai
->primitive_type_vector
[ada_primitive_type_void
]
13828 = builtin
->builtin_void
;
13830 lai
->primitive_type_vector
[ada_primitive_type_system_address
]
13831 = lookup_pointer_type (arch_type (gdbarch
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
,
13833 lai
->primitive_type_vector
[ada_primitive_type_system_address
]
13834 ->set_name ("system__address");
13836 /* Create the equivalent of the System.Storage_Elements.Storage_Offset
13837 type. This is a signed integral type whose size is the same as
13838 the size of addresses. */
13840 unsigned int addr_length
= TYPE_LENGTH
13841 (lai
->primitive_type_vector
[ada_primitive_type_system_address
]);
13843 lai
->primitive_type_vector
[ada_primitive_type_storage_offset
]
13844 = arch_integer_type (gdbarch
, addr_length
* HOST_CHAR_BIT
, 0,
13848 lai
->bool_type_symbol
= NULL
;
13849 lai
->bool_type_default
= builtin
->builtin_bool
;
13852 /* Language vector */
13854 /* Not really used, but needed in the ada_language_defn. */
13857 emit_char (int c
, struct type
*type
, struct ui_file
*stream
, int quoter
)
13859 ada_emit_char (c
, type
, stream
, quoter
, 1);
13863 parse (struct parser_state
*ps
)
13865 warnings_issued
= 0;
13866 return ada_parse (ps
);
13869 static const struct exp_descriptor ada_exp_descriptor
= {
13871 ada_operator_length
,
13872 ada_operator_check
,
13874 ada_dump_subexp_body
,
13875 ada_evaluate_subexp
13878 /* symbol_name_matcher_ftype adapter for wild_match. */
13881 do_wild_match (const char *symbol_search_name
,
13882 const lookup_name_info
&lookup_name
,
13883 completion_match_result
*comp_match_res
)
13885 return wild_match (symbol_search_name
, ada_lookup_name (lookup_name
));
13888 /* symbol_name_matcher_ftype adapter for full_match. */
13891 do_full_match (const char *symbol_search_name
,
13892 const lookup_name_info
&lookup_name
,
13893 completion_match_result
*comp_match_res
)
13895 return full_match (symbol_search_name
, ada_lookup_name (lookup_name
));
13898 /* symbol_name_matcher_ftype for exact (verbatim) matches. */
13901 do_exact_match (const char *symbol_search_name
,
13902 const lookup_name_info
&lookup_name
,
13903 completion_match_result
*comp_match_res
)
13905 return strcmp (symbol_search_name
, ada_lookup_name (lookup_name
)) == 0;
13908 /* Build the Ada lookup name for LOOKUP_NAME. */
13910 ada_lookup_name_info::ada_lookup_name_info (const lookup_name_info
&lookup_name
)
13912 gdb::string_view user_name
= lookup_name
.name ();
13914 if (user_name
[0] == '<')
13916 if (user_name
.back () == '>')
13918 = user_name
.substr (1, user_name
.size () - 2).to_string ();
13921 = user_name
.substr (1, user_name
.size () - 1).to_string ();
13922 m_encoded_p
= true;
13923 m_verbatim_p
= true;
13924 m_wild_match_p
= false;
13925 m_standard_p
= false;
13929 m_verbatim_p
= false;
13931 m_encoded_p
= user_name
.find ("__") != gdb::string_view::npos
;
13935 const char *folded
= ada_fold_name (user_name
);
13936 const char *encoded
= ada_encode_1 (folded
, false);
13937 if (encoded
!= NULL
)
13938 m_encoded_name
= encoded
;
13940 m_encoded_name
= user_name
.to_string ();
13943 m_encoded_name
= user_name
.to_string ();
13945 /* Handle the 'package Standard' special case. See description
13946 of m_standard_p. */
13947 if (startswith (m_encoded_name
.c_str (), "standard__"))
13949 m_encoded_name
= m_encoded_name
.substr (sizeof ("standard__") - 1);
13950 m_standard_p
= true;
13953 m_standard_p
= false;
13955 /* If the name contains a ".", then the user is entering a fully
13956 qualified entity name, and the match must not be done in wild
13957 mode. Similarly, if the user wants to complete what looks
13958 like an encoded name, the match must not be done in wild
13959 mode. Also, in the standard__ special case always do
13960 non-wild matching. */
13962 = (lookup_name
.match_type () != symbol_name_match_type::FULL
13965 && user_name
.find ('.') == std::string::npos
);
13969 /* symbol_name_matcher_ftype method for Ada. This only handles
13970 completion mode. */
13973 ada_symbol_name_matches (const char *symbol_search_name
,
13974 const lookup_name_info
&lookup_name
,
13975 completion_match_result
*comp_match_res
)
13977 return lookup_name
.ada ().matches (symbol_search_name
,
13978 lookup_name
.match_type (),
13982 /* A name matcher that matches the symbol name exactly, with
13986 literal_symbol_name_matcher (const char *symbol_search_name
,
13987 const lookup_name_info
&lookup_name
,
13988 completion_match_result
*comp_match_res
)
13990 gdb::string_view name_view
= lookup_name
.name ();
13992 if (lookup_name
.completion_mode ()
13993 ? (strncmp (symbol_search_name
, name_view
.data (),
13994 name_view
.size ()) == 0)
13995 : symbol_search_name
== name_view
)
13997 if (comp_match_res
!= NULL
)
13998 comp_match_res
->set_match (symbol_search_name
);
14005 /* Implement the "la_get_symbol_name_matcher" language_defn method for
14008 static symbol_name_matcher_ftype
*
14009 ada_get_symbol_name_matcher (const lookup_name_info
&lookup_name
)
14011 if (lookup_name
.match_type () == symbol_name_match_type::SEARCH_NAME
)
14012 return literal_symbol_name_matcher
;
14014 if (lookup_name
.completion_mode ())
14015 return ada_symbol_name_matches
;
14018 if (lookup_name
.ada ().wild_match_p ())
14019 return do_wild_match
;
14020 else if (lookup_name
.ada ().verbatim_p ())
14021 return do_exact_match
;
14023 return do_full_match
;
14027 /* Implement the "la_read_var_value" language_defn method for Ada. */
14029 static struct value
*
14030 ada_read_var_value (struct symbol
*var
, const struct block
*var_block
,
14031 struct frame_info
*frame
)
14033 /* The only case where default_read_var_value is not sufficient
14034 is when VAR is a renaming... */
14035 if (frame
!= nullptr)
14037 const struct block
*frame_block
= get_frame_block (frame
, NULL
);
14038 if (frame_block
!= nullptr && ada_is_renaming_symbol (var
))
14039 return ada_read_renaming_var_value (var
, frame_block
);
14042 /* This is a typical case where we expect the default_read_var_value
14043 function to work. */
14044 return default_read_var_value (var
, var_block
, frame
);
14047 static const char *ada_extensions
[] =
14049 ".adb", ".ads", ".a", ".ada", ".dg", NULL
14052 extern const struct language_defn ada_language_defn
= {
14053 "ada", /* Language name */
14057 case_sensitive_on
, /* Yes, Ada is case-insensitive, but
14058 that's not quite what this means. */
14060 macro_expansion_no
,
14062 &ada_exp_descriptor
,
14065 ada_printchar
, /* Print a character constant */
14066 ada_printstr
, /* Function to print string constant */
14067 emit_char
, /* Function to print single char (not used) */
14068 ada_print_type
, /* Print a type using appropriate syntax */
14069 ada_print_typedef
, /* Print a typedef using appropriate syntax */
14070 ada_value_print_inner
, /* la_value_print_inner */
14071 ada_value_print
, /* Print a top-level value */
14072 ada_read_var_value
, /* la_read_var_value */
14073 NULL
, /* Language specific skip_trampoline */
14074 NULL
, /* name_of_this */
14075 true, /* la_store_sym_names_in_linkage_form_p */
14076 ada_lookup_symbol_nonlocal
, /* Looking up non-local symbols. */
14077 basic_lookup_transparent_type
, /* lookup_transparent_type */
14078 ada_la_decode
, /* Language specific symbol demangler */
14079 ada_sniff_from_mangled_name
,
14080 NULL
, /* Language specific
14081 class_name_from_physname */
14082 ada_op_print_tab
, /* expression operators for printing */
14083 0, /* c-style arrays */
14084 1, /* String lower bound */
14085 ada_get_gdb_completer_word_break_characters
,
14086 ada_collect_symbol_completion_matches
,
14087 ada_language_arch_info
,
14088 ada_print_array_index
,
14089 default_pass_by_reference
,
14090 ada_watch_location_expression
,
14091 ada_get_symbol_name_matcher
, /* la_get_symbol_name_matcher */
14092 ada_iterate_over_symbols
,
14093 default_search_name_hash
,
14097 ada_is_string_type
,
14098 "(...)" /* la_struct_too_deep_ellipsis */
14101 /* Command-list for the "set/show ada" prefix command. */
14102 static struct cmd_list_element
*set_ada_list
;
14103 static struct cmd_list_element
*show_ada_list
;
14106 initialize_ada_catchpoint_ops (void)
14108 struct breakpoint_ops
*ops
;
14110 initialize_breakpoint_ops ();
14112 ops
= &catch_exception_breakpoint_ops
;
14113 *ops
= bkpt_breakpoint_ops
;
14114 ops
->allocate_location
= allocate_location_exception
;
14115 ops
->re_set
= re_set_exception
;
14116 ops
->check_status
= check_status_exception
;
14117 ops
->print_it
= print_it_exception
;
14118 ops
->print_one
= print_one_exception
;
14119 ops
->print_mention
= print_mention_exception
;
14120 ops
->print_recreate
= print_recreate_exception
;
14122 ops
= &catch_exception_unhandled_breakpoint_ops
;
14123 *ops
= bkpt_breakpoint_ops
;
14124 ops
->allocate_location
= allocate_location_exception
;
14125 ops
->re_set
= re_set_exception
;
14126 ops
->check_status
= check_status_exception
;
14127 ops
->print_it
= print_it_exception
;
14128 ops
->print_one
= print_one_exception
;
14129 ops
->print_mention
= print_mention_exception
;
14130 ops
->print_recreate
= print_recreate_exception
;
14132 ops
= &catch_assert_breakpoint_ops
;
14133 *ops
= bkpt_breakpoint_ops
;
14134 ops
->allocate_location
= allocate_location_exception
;
14135 ops
->re_set
= re_set_exception
;
14136 ops
->check_status
= check_status_exception
;
14137 ops
->print_it
= print_it_exception
;
14138 ops
->print_one
= print_one_exception
;
14139 ops
->print_mention
= print_mention_exception
;
14140 ops
->print_recreate
= print_recreate_exception
;
14142 ops
= &catch_handlers_breakpoint_ops
;
14143 *ops
= bkpt_breakpoint_ops
;
14144 ops
->allocate_location
= allocate_location_exception
;
14145 ops
->re_set
= re_set_exception
;
14146 ops
->check_status
= check_status_exception
;
14147 ops
->print_it
= print_it_exception
;
14148 ops
->print_one
= print_one_exception
;
14149 ops
->print_mention
= print_mention_exception
;
14150 ops
->print_recreate
= print_recreate_exception
;
14153 /* This module's 'new_objfile' observer. */
14156 ada_new_objfile_observer (struct objfile
*objfile
)
14158 ada_clear_symbol_cache ();
14161 /* This module's 'free_objfile' observer. */
14164 ada_free_objfile_observer (struct objfile
*objfile
)
14166 ada_clear_symbol_cache ();
14169 void _initialize_ada_language ();
14171 _initialize_ada_language ()
14173 initialize_ada_catchpoint_ops ();
14175 add_basic_prefix_cmd ("ada", no_class
,
14176 _("Prefix command for changing Ada-specific settings."),
14177 &set_ada_list
, "set ada ", 0, &setlist
);
14179 add_show_prefix_cmd ("ada", no_class
,
14180 _("Generic command for showing Ada-specific settings."),
14181 &show_ada_list
, "show ada ", 0, &showlist
);
14183 add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure
,
14184 &trust_pad_over_xvs
, _("\
14185 Enable or disable an optimization trusting PAD types over XVS types."), _("\
14186 Show whether an optimization trusting PAD types over XVS types is activated."),
14188 This is related to the encoding used by the GNAT compiler. The debugger\n\
14189 should normally trust the contents of PAD types, but certain older versions\n\
14190 of GNAT have a bug that sometimes causes the information in the PAD type\n\
14191 to be incorrect. Turning this setting \"off\" allows the debugger to\n\
14192 work around this bug. It is always safe to turn this option \"off\", but\n\
14193 this incurs a slight performance penalty, so it is recommended to NOT change\n\
14194 this option to \"off\" unless necessary."),
14195 NULL
, NULL
, &set_ada_list
, &show_ada_list
);
14197 add_setshow_boolean_cmd ("print-signatures", class_vars
,
14198 &print_signatures
, _("\
14199 Enable or disable the output of formal and return types for functions in the \
14200 overloads selection menu."), _("\
14201 Show whether the output of formal and return types for functions in the \
14202 overloads selection menu is activated."),
14203 NULL
, NULL
, NULL
, &set_ada_list
, &show_ada_list
);
14205 add_catch_command ("exception", _("\
14206 Catch Ada exceptions, when raised.\n\
14207 Usage: catch exception [ARG] [if CONDITION]\n\
14208 Without any argument, stop when any Ada exception is raised.\n\
14209 If ARG is \"unhandled\" (without the quotes), only stop when the exception\n\
14210 being raised does not have a handler (and will therefore lead to the task's\n\
14212 Otherwise, the catchpoint only stops when the name of the exception being\n\
14213 raised is the same as ARG.\n\
14214 CONDITION is a boolean expression that is evaluated to see whether the\n\
14215 exception should cause a stop."),
14216 catch_ada_exception_command
,
14217 catch_ada_completer
,
14221 add_catch_command ("handlers", _("\
14222 Catch Ada exceptions, when handled.\n\
14223 Usage: catch handlers [ARG] [if CONDITION]\n\
14224 Without any argument, stop when any Ada exception is handled.\n\
14225 With an argument, catch only exceptions with the given name.\n\
14226 CONDITION is a boolean expression that is evaluated to see whether the\n\
14227 exception should cause a stop."),
14228 catch_ada_handlers_command
,
14229 catch_ada_completer
,
14232 add_catch_command ("assert", _("\
14233 Catch failed Ada assertions, when raised.\n\
14234 Usage: catch assert [if CONDITION]\n\
14235 CONDITION is a boolean expression that is evaluated to see whether the\n\
14236 exception should cause a stop."),
14237 catch_assert_command
,
14242 varsize_limit
= 65536;
14243 add_setshow_uinteger_cmd ("varsize-limit", class_support
,
14244 &varsize_limit
, _("\
14245 Set the maximum number of bytes allowed in a variable-size object."), _("\
14246 Show the maximum number of bytes allowed in a variable-size object."), _("\
14247 Attempts to access an object whose size is not a compile-time constant\n\
14248 and exceeds this limit will cause an error."),
14249 NULL
, NULL
, &setlist
, &showlist
);
14251 add_info ("exceptions", info_exceptions_command
,
14253 List all Ada exception names.\n\
14254 Usage: info exceptions [REGEXP]\n\
14255 If a regular expression is passed as an argument, only those matching\n\
14256 the regular expression are listed."));
14258 add_basic_prefix_cmd ("ada", class_maintenance
,
14259 _("Set Ada maintenance-related variables."),
14260 &maint_set_ada_cmdlist
, "maintenance set ada ",
14261 0/*allow-unknown*/, &maintenance_set_cmdlist
);
14263 add_show_prefix_cmd ("ada", class_maintenance
,
14264 _("Show Ada maintenance-related variables."),
14265 &maint_show_ada_cmdlist
, "maintenance show ada ",
14266 0/*allow-unknown*/, &maintenance_show_cmdlist
);
14268 add_setshow_boolean_cmd
14269 ("ignore-descriptive-types", class_maintenance
,
14270 &ada_ignore_descriptive_types_p
,
14271 _("Set whether descriptive types generated by GNAT should be ignored."),
14272 _("Show whether descriptive types generated by GNAT should be ignored."),
14274 When enabled, the debugger will stop using the DW_AT_GNAT_descriptive_type\n\
14275 DWARF attribute."),
14276 NULL
, NULL
, &maint_set_ada_cmdlist
, &maint_show_ada_cmdlist
);
14278 decoded_names_store
= htab_create_alloc (256, htab_hash_string
, streq_hash
,
14279 NULL
, xcalloc
, xfree
);
14281 /* The ada-lang observers. */
14282 gdb::observers::new_objfile
.attach (ada_new_objfile_observer
);
14283 gdb::observers::free_objfile
.attach (ada_free_objfile_observer
);
14284 gdb::observers::inferior_exit
.attach (ada_inferior_exit
);