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6e681866 | 1 | /* Ada language support routines for GDB, the GNU debugger. |
10a2c479 | 2 | |
b811d2c2 | 3 | Copyright (C) 1992-2020 Free Software Foundation, Inc. |
14f9c5c9 | 4 | |
a9762ec7 | 5 | This file is part of GDB. |
14f9c5c9 | 6 | |
a9762ec7 JB |
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. | |
14f9c5c9 | 11 | |
a9762ec7 JB |
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. | |
14f9c5c9 | 16 | |
a9762ec7 JB |
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/>. */ | |
14f9c5c9 | 19 | |
96d887e8 | 20 | |
4c4b4cd2 | 21 | #include "defs.h" |
14f9c5c9 | 22 | #include <ctype.h> |
d55e5aa6 | 23 | #include "gdb_regex.h" |
4de283e4 TT |
24 | #include "frame.h" |
25 | #include "symtab.h" | |
26 | #include "gdbtypes.h" | |
14f9c5c9 | 27 | #include "gdbcmd.h" |
4de283e4 TT |
28 | #include "expression.h" |
29 | #include "parser-defs.h" | |
30 | #include "language.h" | |
31 | #include "varobj.h" | |
4de283e4 TT |
32 | #include "inferior.h" |
33 | #include "symfile.h" | |
34 | #include "objfiles.h" | |
35 | #include "breakpoint.h" | |
14f9c5c9 | 36 | #include "gdbcore.h" |
4c4b4cd2 | 37 | #include "hashtab.h" |
4de283e4 TT |
38 | #include "gdb_obstack.h" |
39 | #include "ada-lang.h" | |
40 | #include "completer.h" | |
4de283e4 TT |
41 | #include "ui-out.h" |
42 | #include "block.h" | |
04714b91 | 43 | #include "infcall.h" |
4de283e4 TT |
44 | #include "annotate.h" |
45 | #include "valprint.h" | |
d55e5aa6 | 46 | #include "source.h" |
4de283e4 | 47 | #include "observable.h" |
692465f1 | 48 | #include "stack.h" |
79d43c61 | 49 | #include "typeprint.h" |
4de283e4 | 50 | #include "namespace.h" |
7f6aba03 | 51 | #include "cli/cli-style.h" |
4de283e4 | 52 | |
40bc484c | 53 | #include "value.h" |
4de283e4 TT |
54 | #include "mi/mi-common.h" |
55 | #include "arch-utils.h" | |
56 | #include "cli/cli-utils.h" | |
268a13a5 TT |
57 | #include "gdbsupport/function-view.h" |
58 | #include "gdbsupport/byte-vector.h" | |
4de283e4 | 59 | #include <algorithm> |
ccefe4c4 | 60 | |
4c4b4cd2 | 61 | /* Define whether or not the C operator '/' truncates towards zero for |
0963b4bd | 62 | differently signed operands (truncation direction is undefined in C). |
4c4b4cd2 PH |
63 | Copied from valarith.c. */ |
64 | ||
65 | #ifndef TRUNCATION_TOWARDS_ZERO | |
66 | #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2) | |
67 | #endif | |
68 | ||
d2e4a39e | 69 | static struct type *desc_base_type (struct type *); |
14f9c5c9 | 70 | |
d2e4a39e | 71 | static struct type *desc_bounds_type (struct type *); |
14f9c5c9 | 72 | |
d2e4a39e | 73 | static struct value *desc_bounds (struct value *); |
14f9c5c9 | 74 | |
d2e4a39e | 75 | static int fat_pntr_bounds_bitpos (struct type *); |
14f9c5c9 | 76 | |
d2e4a39e | 77 | static int fat_pntr_bounds_bitsize (struct type *); |
14f9c5c9 | 78 | |
556bdfd4 | 79 | static struct type *desc_data_target_type (struct type *); |
14f9c5c9 | 80 | |
d2e4a39e | 81 | static struct value *desc_data (struct value *); |
14f9c5c9 | 82 | |
d2e4a39e | 83 | static int fat_pntr_data_bitpos (struct type *); |
14f9c5c9 | 84 | |
d2e4a39e | 85 | static int fat_pntr_data_bitsize (struct type *); |
14f9c5c9 | 86 | |
d2e4a39e | 87 | static struct value *desc_one_bound (struct value *, int, int); |
14f9c5c9 | 88 | |
d2e4a39e | 89 | static int desc_bound_bitpos (struct type *, int, int); |
14f9c5c9 | 90 | |
d2e4a39e | 91 | static int desc_bound_bitsize (struct type *, int, int); |
14f9c5c9 | 92 | |
d2e4a39e | 93 | static struct type *desc_index_type (struct type *, int); |
14f9c5c9 | 94 | |
d2e4a39e | 95 | static int desc_arity (struct type *); |
14f9c5c9 | 96 | |
d2e4a39e | 97 | static int ada_type_match (struct type *, struct type *, int); |
14f9c5c9 | 98 | |
d2e4a39e | 99 | static int ada_args_match (struct symbol *, struct value **, int); |
14f9c5c9 | 100 | |
40bc484c | 101 | static struct value *make_array_descriptor (struct type *, struct value *); |
14f9c5c9 | 102 | |
4c4b4cd2 | 103 | static void ada_add_block_symbols (struct obstack *, |
b5ec771e PA |
104 | const struct block *, |
105 | const lookup_name_info &lookup_name, | |
106 | domain_enum, struct objfile *); | |
14f9c5c9 | 107 | |
22cee43f | 108 | static void ada_add_all_symbols (struct obstack *, const struct block *, |
b5ec771e PA |
109 | const lookup_name_info &lookup_name, |
110 | domain_enum, int, int *); | |
22cee43f | 111 | |
d12307c1 | 112 | static int is_nonfunction (struct block_symbol *, int); |
14f9c5c9 | 113 | |
76a01679 | 114 | static void add_defn_to_vec (struct obstack *, struct symbol *, |
dda83cd7 | 115 | const struct block *); |
14f9c5c9 | 116 | |
4c4b4cd2 PH |
117 | static int num_defns_collected (struct obstack *); |
118 | ||
d12307c1 | 119 | static struct block_symbol *defns_collected (struct obstack *, int); |
14f9c5c9 | 120 | |
e9d9f57e | 121 | static struct value *resolve_subexp (expression_up *, int *, int, |
dda83cd7 | 122 | struct type *, int, |
699bd4cf | 123 | innermost_block_tracker *); |
14f9c5c9 | 124 | |
e9d9f57e | 125 | static void replace_operator_with_call (expression_up *, int, int, int, |
dda83cd7 | 126 | struct symbol *, const struct block *); |
14f9c5c9 | 127 | |
d2e4a39e | 128 | static int possible_user_operator_p (enum exp_opcode, struct value **); |
14f9c5c9 | 129 | |
4c4b4cd2 | 130 | static const char *ada_decoded_op_name (enum exp_opcode); |
14f9c5c9 | 131 | |
d2e4a39e | 132 | static int numeric_type_p (struct type *); |
14f9c5c9 | 133 | |
d2e4a39e | 134 | static int integer_type_p (struct type *); |
14f9c5c9 | 135 | |
d2e4a39e | 136 | static int scalar_type_p (struct type *); |
14f9c5c9 | 137 | |
d2e4a39e | 138 | static int discrete_type_p (struct type *); |
14f9c5c9 | 139 | |
a121b7c1 | 140 | static struct type *ada_lookup_struct_elt_type (struct type *, const char *, |
dda83cd7 | 141 | int, int); |
4c4b4cd2 | 142 | |
d2e4a39e | 143 | static struct value *evaluate_subexp_type (struct expression *, int *); |
14f9c5c9 | 144 | |
b4ba55a1 | 145 | static struct type *ada_find_parallel_type_with_name (struct type *, |
dda83cd7 | 146 | const char *); |
b4ba55a1 | 147 | |
d2e4a39e | 148 | static int is_dynamic_field (struct type *, int); |
14f9c5c9 | 149 | |
10a2c479 | 150 | static struct type *to_fixed_variant_branch_type (struct type *, |
fc1a4b47 | 151 | const gdb_byte *, |
dda83cd7 | 152 | CORE_ADDR, struct value *); |
4c4b4cd2 PH |
153 | |
154 | static struct type *to_fixed_array_type (struct type *, struct value *, int); | |
14f9c5c9 | 155 | |
28c85d6c | 156 | static struct type *to_fixed_range_type (struct type *, struct value *); |
14f9c5c9 | 157 | |
d2e4a39e | 158 | static struct type *to_static_fixed_type (struct type *); |
f192137b | 159 | static struct type *static_unwrap_type (struct type *type); |
14f9c5c9 | 160 | |
d2e4a39e | 161 | static struct value *unwrap_value (struct value *); |
14f9c5c9 | 162 | |
ad82864c | 163 | static struct type *constrained_packed_array_type (struct type *, long *); |
14f9c5c9 | 164 | |
ad82864c | 165 | static struct type *decode_constrained_packed_array_type (struct type *); |
14f9c5c9 | 166 | |
ad82864c JB |
167 | static long decode_packed_array_bitsize (struct type *); |
168 | ||
169 | static struct value *decode_constrained_packed_array (struct value *); | |
170 | ||
ad82864c | 171 | static int ada_is_unconstrained_packed_array_type (struct type *); |
14f9c5c9 | 172 | |
d2e4a39e | 173 | static struct value *value_subscript_packed (struct value *, int, |
dda83cd7 | 174 | struct value **); |
14f9c5c9 | 175 | |
4c4b4cd2 | 176 | static struct value *coerce_unspec_val_to_type (struct value *, |
dda83cd7 | 177 | struct type *); |
14f9c5c9 | 178 | |
d2e4a39e | 179 | static int lesseq_defined_than (struct symbol *, struct symbol *); |
14f9c5c9 | 180 | |
d2e4a39e | 181 | static int equiv_types (struct type *, struct type *); |
14f9c5c9 | 182 | |
d2e4a39e | 183 | static int is_name_suffix (const char *); |
14f9c5c9 | 184 | |
59c8a30b | 185 | static int advance_wild_match (const char **, const char *, char); |
73589123 | 186 | |
b5ec771e | 187 | static bool wild_match (const char *name, const char *patn); |
14f9c5c9 | 188 | |
d2e4a39e | 189 | static struct value *ada_coerce_ref (struct value *); |
14f9c5c9 | 190 | |
4c4b4cd2 PH |
191 | static LONGEST pos_atr (struct value *); |
192 | ||
3cb382c9 | 193 | static struct value *value_pos_atr (struct type *, struct value *); |
14f9c5c9 | 194 | |
53a47a3e TT |
195 | static struct value *val_atr (struct type *, LONGEST); |
196 | ||
d2e4a39e | 197 | static struct value *value_val_atr (struct type *, struct value *); |
14f9c5c9 | 198 | |
4c4b4cd2 | 199 | static struct symbol *standard_lookup (const char *, const struct block *, |
dda83cd7 | 200 | domain_enum); |
14f9c5c9 | 201 | |
108d56a4 | 202 | static struct value *ada_search_struct_field (const char *, struct value *, int, |
dda83cd7 | 203 | struct type *); |
4c4b4cd2 | 204 | |
0d5cff50 | 205 | static int find_struct_field (const char *, struct type *, int, |
dda83cd7 | 206 | struct type **, int *, int *, int *, int *); |
4c4b4cd2 | 207 | |
d12307c1 | 208 | static int ada_resolve_function (struct block_symbol *, int, |
dda83cd7 SM |
209 | struct value **, int, const char *, |
210 | struct type *, int); | |
4c4b4cd2 | 211 | |
4c4b4cd2 PH |
212 | static int ada_is_direct_array_type (struct type *); |
213 | ||
52ce6436 PH |
214 | static struct value *ada_index_struct_field (int, struct value *, int, |
215 | struct type *); | |
216 | ||
217 | static struct value *assign_aggregate (struct value *, struct value *, | |
0963b4bd MS |
218 | struct expression *, |
219 | int *, enum noside); | |
52ce6436 | 220 | |
cf608cc4 | 221 | static void aggregate_assign_from_choices (struct value *, struct value *, |
52ce6436 | 222 | struct expression *, |
cf608cc4 TT |
223 | int *, std::vector<LONGEST> &, |
224 | LONGEST, LONGEST); | |
52ce6436 PH |
225 | |
226 | static void aggregate_assign_positional (struct value *, struct value *, | |
227 | struct expression *, | |
cf608cc4 | 228 | int *, std::vector<LONGEST> &, |
52ce6436 PH |
229 | LONGEST, LONGEST); |
230 | ||
231 | ||
232 | static void aggregate_assign_others (struct value *, struct value *, | |
233 | struct expression *, | |
cf608cc4 TT |
234 | int *, std::vector<LONGEST> &, |
235 | LONGEST, LONGEST); | |
52ce6436 PH |
236 | |
237 | ||
cf608cc4 | 238 | static void add_component_interval (LONGEST, LONGEST, std::vector<LONGEST> &); |
52ce6436 PH |
239 | |
240 | ||
241 | static struct value *ada_evaluate_subexp (struct type *, struct expression *, | |
242 | int *, enum noside); | |
243 | ||
244 | static void ada_forward_operator_length (struct expression *, int, int *, | |
245 | int *); | |
852dff6c JB |
246 | |
247 | static struct type *ada_find_any_type (const char *name); | |
b5ec771e PA |
248 | |
249 | static symbol_name_matcher_ftype *ada_get_symbol_name_matcher | |
250 | (const lookup_name_info &lookup_name); | |
251 | ||
4c4b4cd2 PH |
252 | \f |
253 | ||
ee01b665 JB |
254 | /* The result of a symbol lookup to be stored in our symbol cache. */ |
255 | ||
256 | struct cache_entry | |
257 | { | |
258 | /* The name used to perform the lookup. */ | |
259 | const char *name; | |
260 | /* The namespace used during the lookup. */ | |
fe978cb0 | 261 | domain_enum domain; |
ee01b665 JB |
262 | /* The symbol returned by the lookup, or NULL if no matching symbol |
263 | was found. */ | |
264 | struct symbol *sym; | |
265 | /* The block where the symbol was found, or NULL if no matching | |
266 | symbol was found. */ | |
267 | const struct block *block; | |
268 | /* A pointer to the next entry with the same hash. */ | |
269 | struct cache_entry *next; | |
270 | }; | |
271 | ||
272 | /* The Ada symbol cache, used to store the result of Ada-mode symbol | |
273 | lookups in the course of executing the user's commands. | |
274 | ||
275 | The cache is implemented using a simple, fixed-sized hash. | |
276 | The size is fixed on the grounds that there are not likely to be | |
277 | all that many symbols looked up during any given session, regardless | |
278 | of the size of the symbol table. If we decide to go to a resizable | |
279 | table, let's just use the stuff from libiberty instead. */ | |
280 | ||
281 | #define HASH_SIZE 1009 | |
282 | ||
283 | struct ada_symbol_cache | |
284 | { | |
285 | /* An obstack used to store the entries in our cache. */ | |
286 | struct obstack cache_space; | |
287 | ||
288 | /* The root of the hash table used to implement our symbol cache. */ | |
289 | struct cache_entry *root[HASH_SIZE]; | |
290 | }; | |
291 | ||
292 | static void ada_free_symbol_cache (struct ada_symbol_cache *sym_cache); | |
76a01679 | 293 | |
4c4b4cd2 | 294 | /* Maximum-sized dynamic type. */ |
14f9c5c9 AS |
295 | static unsigned int varsize_limit; |
296 | ||
67cb5b2d | 297 | static const char ada_completer_word_break_characters[] = |
4c4b4cd2 PH |
298 | #ifdef VMS |
299 | " \t\n!@#%^&*()+=|~`}{[]\";:?/,-"; | |
300 | #else | |
14f9c5c9 | 301 | " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-"; |
4c4b4cd2 | 302 | #endif |
14f9c5c9 | 303 | |
4c4b4cd2 | 304 | /* The name of the symbol to use to get the name of the main subprogram. */ |
76a01679 | 305 | static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[] |
4c4b4cd2 | 306 | = "__gnat_ada_main_program_name"; |
14f9c5c9 | 307 | |
4c4b4cd2 PH |
308 | /* Limit on the number of warnings to raise per expression evaluation. */ |
309 | static int warning_limit = 2; | |
310 | ||
311 | /* Number of warning messages issued; reset to 0 by cleanups after | |
312 | expression evaluation. */ | |
313 | static int warnings_issued = 0; | |
314 | ||
27087b7f | 315 | static const char * const known_runtime_file_name_patterns[] = { |
4c4b4cd2 PH |
316 | ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL |
317 | }; | |
318 | ||
27087b7f | 319 | static const char * const known_auxiliary_function_name_patterns[] = { |
4c4b4cd2 PH |
320 | ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL |
321 | }; | |
322 | ||
c6044dd1 JB |
323 | /* Maintenance-related settings for this module. */ |
324 | ||
325 | static struct cmd_list_element *maint_set_ada_cmdlist; | |
326 | static struct cmd_list_element *maint_show_ada_cmdlist; | |
327 | ||
c6044dd1 JB |
328 | /* The "maintenance ada set/show ignore-descriptive-type" value. */ |
329 | ||
491144b5 | 330 | static bool ada_ignore_descriptive_types_p = false; |
c6044dd1 | 331 | |
e802dbe0 JB |
332 | /* Inferior-specific data. */ |
333 | ||
334 | /* Per-inferior data for this module. */ | |
335 | ||
336 | struct ada_inferior_data | |
337 | { | |
338 | /* The ada__tags__type_specific_data type, which is used when decoding | |
339 | tagged types. With older versions of GNAT, this type was directly | |
340 | accessible through a component ("tsd") in the object tag. But this | |
341 | is no longer the case, so we cache it for each inferior. */ | |
f37b313d | 342 | struct type *tsd_type = nullptr; |
3eecfa55 JB |
343 | |
344 | /* The exception_support_info data. This data is used to determine | |
345 | how to implement support for Ada exception catchpoints in a given | |
346 | inferior. */ | |
f37b313d | 347 | const struct exception_support_info *exception_info = nullptr; |
e802dbe0 JB |
348 | }; |
349 | ||
350 | /* Our key to this module's inferior data. */ | |
f37b313d | 351 | static const struct inferior_key<ada_inferior_data> ada_inferior_data; |
e802dbe0 JB |
352 | |
353 | /* Return our inferior data for the given inferior (INF). | |
354 | ||
355 | This function always returns a valid pointer to an allocated | |
356 | ada_inferior_data structure. If INF's inferior data has not | |
357 | been previously set, this functions creates a new one with all | |
358 | fields set to zero, sets INF's inferior to it, and then returns | |
359 | a pointer to that newly allocated ada_inferior_data. */ | |
360 | ||
361 | static struct ada_inferior_data * | |
362 | get_ada_inferior_data (struct inferior *inf) | |
363 | { | |
364 | struct ada_inferior_data *data; | |
365 | ||
f37b313d | 366 | data = ada_inferior_data.get (inf); |
e802dbe0 | 367 | if (data == NULL) |
f37b313d | 368 | data = ada_inferior_data.emplace (inf); |
e802dbe0 JB |
369 | |
370 | return data; | |
371 | } | |
372 | ||
373 | /* Perform all necessary cleanups regarding our module's inferior data | |
374 | that is required after the inferior INF just exited. */ | |
375 | ||
376 | static void | |
377 | ada_inferior_exit (struct inferior *inf) | |
378 | { | |
f37b313d | 379 | ada_inferior_data.clear (inf); |
e802dbe0 JB |
380 | } |
381 | ||
ee01b665 JB |
382 | |
383 | /* program-space-specific data. */ | |
384 | ||
385 | /* This module's per-program-space data. */ | |
386 | struct ada_pspace_data | |
387 | { | |
f37b313d TT |
388 | ~ada_pspace_data () |
389 | { | |
390 | if (sym_cache != NULL) | |
391 | ada_free_symbol_cache (sym_cache); | |
392 | } | |
393 | ||
ee01b665 | 394 | /* The Ada symbol cache. */ |
f37b313d | 395 | struct ada_symbol_cache *sym_cache = nullptr; |
ee01b665 JB |
396 | }; |
397 | ||
398 | /* Key to our per-program-space data. */ | |
f37b313d | 399 | static const struct program_space_key<ada_pspace_data> ada_pspace_data_handle; |
ee01b665 JB |
400 | |
401 | /* Return this module's data for the given program space (PSPACE). | |
402 | If not is found, add a zero'ed one now. | |
403 | ||
404 | This function always returns a valid object. */ | |
405 | ||
406 | static struct ada_pspace_data * | |
407 | get_ada_pspace_data (struct program_space *pspace) | |
408 | { | |
409 | struct ada_pspace_data *data; | |
410 | ||
f37b313d | 411 | data = ada_pspace_data_handle.get (pspace); |
ee01b665 | 412 | if (data == NULL) |
f37b313d | 413 | data = ada_pspace_data_handle.emplace (pspace); |
ee01b665 JB |
414 | |
415 | return data; | |
416 | } | |
417 | ||
dda83cd7 | 418 | /* Utilities */ |
4c4b4cd2 | 419 | |
720d1a40 | 420 | /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after |
eed9788b | 421 | all typedef layers have been peeled. Otherwise, return TYPE. |
720d1a40 JB |
422 | |
423 | Normally, we really expect a typedef type to only have 1 typedef layer. | |
424 | In other words, we really expect the target type of a typedef type to be | |
425 | a non-typedef type. This is particularly true for Ada units, because | |
426 | the language does not have a typedef vs not-typedef distinction. | |
427 | In that respect, the Ada compiler has been trying to eliminate as many | |
428 | typedef definitions in the debugging information, since they generally | |
429 | do not bring any extra information (we still use typedef under certain | |
430 | circumstances related mostly to the GNAT encoding). | |
431 | ||
432 | Unfortunately, we have seen situations where the debugging information | |
433 | generated by the compiler leads to such multiple typedef layers. For | |
434 | instance, consider the following example with stabs: | |
435 | ||
436 | .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...] | |
437 | .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0 | |
438 | ||
439 | This is an error in the debugging information which causes type | |
440 | pck__float_array___XUP to be defined twice, and the second time, | |
441 | it is defined as a typedef of a typedef. | |
442 | ||
443 | This is on the fringe of legality as far as debugging information is | |
444 | concerned, and certainly unexpected. But it is easy to handle these | |
445 | situations correctly, so we can afford to be lenient in this case. */ | |
446 | ||
447 | static struct type * | |
448 | ada_typedef_target_type (struct type *type) | |
449 | { | |
78134374 | 450 | while (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
451 | type = TYPE_TARGET_TYPE (type); |
452 | return type; | |
453 | } | |
454 | ||
41d27058 JB |
455 | /* Given DECODED_NAME a string holding a symbol name in its |
456 | decoded form (ie using the Ada dotted notation), returns | |
457 | its unqualified name. */ | |
458 | ||
459 | static const char * | |
460 | ada_unqualified_name (const char *decoded_name) | |
461 | { | |
2b0f535a JB |
462 | const char *result; |
463 | ||
464 | /* If the decoded name starts with '<', it means that the encoded | |
465 | name does not follow standard naming conventions, and thus that | |
466 | it is not your typical Ada symbol name. Trying to unqualify it | |
467 | is therefore pointless and possibly erroneous. */ | |
468 | if (decoded_name[0] == '<') | |
469 | return decoded_name; | |
470 | ||
471 | result = strrchr (decoded_name, '.'); | |
41d27058 JB |
472 | if (result != NULL) |
473 | result++; /* Skip the dot... */ | |
474 | else | |
475 | result = decoded_name; | |
476 | ||
477 | return result; | |
478 | } | |
479 | ||
39e7af3e | 480 | /* Return a string starting with '<', followed by STR, and '>'. */ |
41d27058 | 481 | |
39e7af3e | 482 | static std::string |
41d27058 JB |
483 | add_angle_brackets (const char *str) |
484 | { | |
39e7af3e | 485 | return string_printf ("<%s>", str); |
41d27058 | 486 | } |
96d887e8 | 487 | |
de93309a SM |
488 | /* Assuming V points to an array of S objects, make sure that it contains at |
489 | least M objects, updating V and S as necessary. */ | |
490 | ||
491 | #define GROW_VECT(v, s, m) \ | |
492 | if ((s) < (m)) (v) = (char *) grow_vect (v, &(s), m, sizeof *(v)); | |
493 | ||
f27cf670 | 494 | /* Assuming VECT points to an array of *SIZE objects of size |
14f9c5c9 | 495 | ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects, |
f27cf670 | 496 | updating *SIZE as necessary and returning the (new) array. */ |
14f9c5c9 | 497 | |
de93309a | 498 | static void * |
f27cf670 | 499 | grow_vect (void *vect, size_t *size, size_t min_size, int element_size) |
14f9c5c9 | 500 | { |
d2e4a39e AS |
501 | if (*size < min_size) |
502 | { | |
503 | *size *= 2; | |
504 | if (*size < min_size) | |
dda83cd7 | 505 | *size = min_size; |
f27cf670 | 506 | vect = xrealloc (vect, *size * element_size); |
d2e4a39e | 507 | } |
f27cf670 | 508 | return vect; |
14f9c5c9 AS |
509 | } |
510 | ||
511 | /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing | |
4c4b4cd2 | 512 | suffix of FIELD_NAME beginning "___". */ |
14f9c5c9 AS |
513 | |
514 | static int | |
ebf56fd3 | 515 | field_name_match (const char *field_name, const char *target) |
14f9c5c9 AS |
516 | { |
517 | int len = strlen (target); | |
5b4ee69b | 518 | |
d2e4a39e | 519 | return |
4c4b4cd2 PH |
520 | (strncmp (field_name, target, len) == 0 |
521 | && (field_name[len] == '\0' | |
dda83cd7 SM |
522 | || (startswith (field_name + len, "___") |
523 | && strcmp (field_name + strlen (field_name) - 6, | |
524 | "___XVN") != 0))); | |
14f9c5c9 AS |
525 | } |
526 | ||
527 | ||
872c8b51 JB |
528 | /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to |
529 | a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME, | |
530 | and return its index. This function also handles fields whose name | |
531 | have ___ suffixes because the compiler sometimes alters their name | |
532 | by adding such a suffix to represent fields with certain constraints. | |
533 | If the field could not be found, return a negative number if | |
534 | MAYBE_MISSING is set. Otherwise raise an error. */ | |
4c4b4cd2 PH |
535 | |
536 | int | |
537 | ada_get_field_index (const struct type *type, const char *field_name, | |
dda83cd7 | 538 | int maybe_missing) |
4c4b4cd2 PH |
539 | { |
540 | int fieldno; | |
872c8b51 JB |
541 | struct type *struct_type = check_typedef ((struct type *) type); |
542 | ||
1f704f76 | 543 | for (fieldno = 0; fieldno < struct_type->num_fields (); fieldno++) |
872c8b51 | 544 | if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name)) |
4c4b4cd2 PH |
545 | return fieldno; |
546 | ||
547 | if (!maybe_missing) | |
323e0a4a | 548 | error (_("Unable to find field %s in struct %s. Aborting"), |
dda83cd7 | 549 | field_name, struct_type->name ()); |
4c4b4cd2 PH |
550 | |
551 | return -1; | |
552 | } | |
553 | ||
554 | /* The length of the prefix of NAME prior to any "___" suffix. */ | |
14f9c5c9 AS |
555 | |
556 | int | |
d2e4a39e | 557 | ada_name_prefix_len (const char *name) |
14f9c5c9 AS |
558 | { |
559 | if (name == NULL) | |
560 | return 0; | |
d2e4a39e | 561 | else |
14f9c5c9 | 562 | { |
d2e4a39e | 563 | const char *p = strstr (name, "___"); |
5b4ee69b | 564 | |
14f9c5c9 | 565 | if (p == NULL) |
dda83cd7 | 566 | return strlen (name); |
14f9c5c9 | 567 | else |
dda83cd7 | 568 | return p - name; |
14f9c5c9 AS |
569 | } |
570 | } | |
571 | ||
4c4b4cd2 PH |
572 | /* Return non-zero if SUFFIX is a suffix of STR. |
573 | Return zero if STR is null. */ | |
574 | ||
14f9c5c9 | 575 | static int |
d2e4a39e | 576 | is_suffix (const char *str, const char *suffix) |
14f9c5c9 AS |
577 | { |
578 | int len1, len2; | |
5b4ee69b | 579 | |
14f9c5c9 AS |
580 | if (str == NULL) |
581 | return 0; | |
582 | len1 = strlen (str); | |
583 | len2 = strlen (suffix); | |
4c4b4cd2 | 584 | return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0); |
14f9c5c9 AS |
585 | } |
586 | ||
4c4b4cd2 PH |
587 | /* The contents of value VAL, treated as a value of type TYPE. The |
588 | result is an lval in memory if VAL is. */ | |
14f9c5c9 | 589 | |
d2e4a39e | 590 | static struct value * |
4c4b4cd2 | 591 | coerce_unspec_val_to_type (struct value *val, struct type *type) |
14f9c5c9 | 592 | { |
61ee279c | 593 | type = ada_check_typedef (type); |
df407dfe | 594 | if (value_type (val) == type) |
4c4b4cd2 | 595 | return val; |
d2e4a39e | 596 | else |
14f9c5c9 | 597 | { |
4c4b4cd2 PH |
598 | struct value *result; |
599 | ||
600 | /* Make sure that the object size is not unreasonable before | |
dda83cd7 | 601 | trying to allocate some memory for it. */ |
c1b5a1a6 | 602 | ada_ensure_varsize_limit (type); |
4c4b4cd2 | 603 | |
41e8491f | 604 | if (value_lazy (val) |
dda83cd7 | 605 | || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val))) |
41e8491f JK |
606 | result = allocate_value_lazy (type); |
607 | else | |
608 | { | |
609 | result = allocate_value (type); | |
9a0dc9e3 | 610 | value_contents_copy_raw (result, 0, val, 0, TYPE_LENGTH (type)); |
41e8491f | 611 | } |
74bcbdf3 | 612 | set_value_component_location (result, val); |
9bbda503 AC |
613 | set_value_bitsize (result, value_bitsize (val)); |
614 | set_value_bitpos (result, value_bitpos (val)); | |
c408a94f TT |
615 | if (VALUE_LVAL (result) == lval_memory) |
616 | set_value_address (result, value_address (val)); | |
14f9c5c9 AS |
617 | return result; |
618 | } | |
619 | } | |
620 | ||
fc1a4b47 AC |
621 | static const gdb_byte * |
622 | cond_offset_host (const gdb_byte *valaddr, long offset) | |
14f9c5c9 AS |
623 | { |
624 | if (valaddr == NULL) | |
625 | return NULL; | |
626 | else | |
627 | return valaddr + offset; | |
628 | } | |
629 | ||
630 | static CORE_ADDR | |
ebf56fd3 | 631 | cond_offset_target (CORE_ADDR address, long offset) |
14f9c5c9 AS |
632 | { |
633 | if (address == 0) | |
634 | return 0; | |
d2e4a39e | 635 | else |
14f9c5c9 AS |
636 | return address + offset; |
637 | } | |
638 | ||
4c4b4cd2 PH |
639 | /* Issue a warning (as for the definition of warning in utils.c, but |
640 | with exactly one argument rather than ...), unless the limit on the | |
641 | number of warnings has passed during the evaluation of the current | |
642 | expression. */ | |
a2249542 | 643 | |
77109804 AC |
644 | /* FIXME: cagney/2004-10-10: This function is mimicking the behavior |
645 | provided by "complaint". */ | |
a0b31db1 | 646 | static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2); |
77109804 | 647 | |
14f9c5c9 | 648 | static void |
a2249542 | 649 | lim_warning (const char *format, ...) |
14f9c5c9 | 650 | { |
a2249542 | 651 | va_list args; |
a2249542 | 652 | |
5b4ee69b | 653 | va_start (args, format); |
4c4b4cd2 PH |
654 | warnings_issued += 1; |
655 | if (warnings_issued <= warning_limit) | |
a2249542 MK |
656 | vwarning (format, args); |
657 | ||
658 | va_end (args); | |
4c4b4cd2 PH |
659 | } |
660 | ||
714e53ab PH |
661 | /* Issue an error if the size of an object of type T is unreasonable, |
662 | i.e. if it would be a bad idea to allocate a value of this type in | |
663 | GDB. */ | |
664 | ||
c1b5a1a6 JB |
665 | void |
666 | ada_ensure_varsize_limit (const struct type *type) | |
714e53ab PH |
667 | { |
668 | if (TYPE_LENGTH (type) > varsize_limit) | |
323e0a4a | 669 | error (_("object size is larger than varsize-limit")); |
714e53ab PH |
670 | } |
671 | ||
0963b4bd | 672 | /* Maximum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 673 | static LONGEST |
c3e5cd34 | 674 | max_of_size (int size) |
4c4b4cd2 | 675 | { |
76a01679 | 676 | LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2); |
5b4ee69b | 677 | |
76a01679 | 678 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
679 | } |
680 | ||
0963b4bd | 681 | /* Minimum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 682 | static LONGEST |
c3e5cd34 | 683 | min_of_size (int size) |
4c4b4cd2 | 684 | { |
c3e5cd34 | 685 | return -max_of_size (size) - 1; |
4c4b4cd2 PH |
686 | } |
687 | ||
0963b4bd | 688 | /* Maximum value of a SIZE-byte unsigned integer type. */ |
4c4b4cd2 | 689 | static ULONGEST |
c3e5cd34 | 690 | umax_of_size (int size) |
4c4b4cd2 | 691 | { |
76a01679 | 692 | ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1); |
5b4ee69b | 693 | |
76a01679 | 694 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
695 | } |
696 | ||
0963b4bd | 697 | /* Maximum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
698 | static LONGEST |
699 | max_of_type (struct type *t) | |
4c4b4cd2 | 700 | { |
c6d940a9 | 701 | if (t->is_unsigned ()) |
c3e5cd34 PH |
702 | return (LONGEST) umax_of_size (TYPE_LENGTH (t)); |
703 | else | |
704 | return max_of_size (TYPE_LENGTH (t)); | |
705 | } | |
706 | ||
0963b4bd | 707 | /* Minimum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
708 | static LONGEST |
709 | min_of_type (struct type *t) | |
710 | { | |
c6d940a9 | 711 | if (t->is_unsigned ()) |
c3e5cd34 PH |
712 | return 0; |
713 | else | |
714 | return min_of_size (TYPE_LENGTH (t)); | |
4c4b4cd2 PH |
715 | } |
716 | ||
717 | /* The largest value in the domain of TYPE, a discrete type, as an integer. */ | |
43bbcdc2 PH |
718 | LONGEST |
719 | ada_discrete_type_high_bound (struct type *type) | |
4c4b4cd2 | 720 | { |
b249d2c2 | 721 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 722 | switch (type->code ()) |
4c4b4cd2 PH |
723 | { |
724 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
725 | { |
726 | const dynamic_prop &high = type->bounds ()->high; | |
727 | ||
728 | if (high.kind () == PROP_CONST) | |
729 | return high.const_val (); | |
730 | else | |
731 | { | |
732 | gdb_assert (high.kind () == PROP_UNDEFINED); | |
733 | ||
734 | /* This happens when trying to evaluate a type's dynamic bound | |
735 | without a live target. There is nothing relevant for us to | |
736 | return here, so return 0. */ | |
737 | return 0; | |
738 | } | |
739 | } | |
4c4b4cd2 | 740 | case TYPE_CODE_ENUM: |
1f704f76 | 741 | return TYPE_FIELD_ENUMVAL (type, type->num_fields () - 1); |
690cc4eb PH |
742 | case TYPE_CODE_BOOL: |
743 | return 1; | |
744 | case TYPE_CODE_CHAR: | |
76a01679 | 745 | case TYPE_CODE_INT: |
690cc4eb | 746 | return max_of_type (type); |
4c4b4cd2 | 747 | default: |
43bbcdc2 | 748 | error (_("Unexpected type in ada_discrete_type_high_bound.")); |
4c4b4cd2 PH |
749 | } |
750 | } | |
751 | ||
14e75d8e | 752 | /* The smallest value in the domain of TYPE, a discrete type, as an integer. */ |
43bbcdc2 PH |
753 | LONGEST |
754 | ada_discrete_type_low_bound (struct type *type) | |
4c4b4cd2 | 755 | { |
b249d2c2 | 756 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 757 | switch (type->code ()) |
4c4b4cd2 PH |
758 | { |
759 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
760 | { |
761 | const dynamic_prop &low = type->bounds ()->low; | |
762 | ||
763 | if (low.kind () == PROP_CONST) | |
764 | return low.const_val (); | |
765 | else | |
766 | { | |
767 | gdb_assert (low.kind () == PROP_UNDEFINED); | |
768 | ||
769 | /* This happens when trying to evaluate a type's dynamic bound | |
770 | without a live target. There is nothing relevant for us to | |
771 | return here, so return 0. */ | |
772 | return 0; | |
773 | } | |
774 | } | |
4c4b4cd2 | 775 | case TYPE_CODE_ENUM: |
14e75d8e | 776 | return TYPE_FIELD_ENUMVAL (type, 0); |
690cc4eb PH |
777 | case TYPE_CODE_BOOL: |
778 | return 0; | |
779 | case TYPE_CODE_CHAR: | |
76a01679 | 780 | case TYPE_CODE_INT: |
690cc4eb | 781 | return min_of_type (type); |
4c4b4cd2 | 782 | default: |
43bbcdc2 | 783 | error (_("Unexpected type in ada_discrete_type_low_bound.")); |
4c4b4cd2 PH |
784 | } |
785 | } | |
786 | ||
787 | /* The identity on non-range types. For range types, the underlying | |
76a01679 | 788 | non-range scalar type. */ |
4c4b4cd2 PH |
789 | |
790 | static struct type * | |
18af8284 | 791 | get_base_type (struct type *type) |
4c4b4cd2 | 792 | { |
78134374 | 793 | while (type != NULL && type->code () == TYPE_CODE_RANGE) |
4c4b4cd2 | 794 | { |
76a01679 | 795 | if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL) |
dda83cd7 | 796 | return type; |
4c4b4cd2 PH |
797 | type = TYPE_TARGET_TYPE (type); |
798 | } | |
799 | return type; | |
14f9c5c9 | 800 | } |
41246937 JB |
801 | |
802 | /* Return a decoded version of the given VALUE. This means returning | |
803 | a value whose type is obtained by applying all the GNAT-specific | |
85102364 | 804 | encodings, making the resulting type a static but standard description |
41246937 JB |
805 | of the initial type. */ |
806 | ||
807 | struct value * | |
808 | ada_get_decoded_value (struct value *value) | |
809 | { | |
810 | struct type *type = ada_check_typedef (value_type (value)); | |
811 | ||
812 | if (ada_is_array_descriptor_type (type) | |
813 | || (ada_is_constrained_packed_array_type (type) | |
dda83cd7 | 814 | && type->code () != TYPE_CODE_PTR)) |
41246937 | 815 | { |
78134374 | 816 | if (type->code () == TYPE_CODE_TYPEDEF) /* array access type. */ |
dda83cd7 | 817 | value = ada_coerce_to_simple_array_ptr (value); |
41246937 | 818 | else |
dda83cd7 | 819 | value = ada_coerce_to_simple_array (value); |
41246937 JB |
820 | } |
821 | else | |
822 | value = ada_to_fixed_value (value); | |
823 | ||
824 | return value; | |
825 | } | |
826 | ||
827 | /* Same as ada_get_decoded_value, but with the given TYPE. | |
828 | Because there is no associated actual value for this type, | |
829 | the resulting type might be a best-effort approximation in | |
830 | the case of dynamic types. */ | |
831 | ||
832 | struct type * | |
833 | ada_get_decoded_type (struct type *type) | |
834 | { | |
835 | type = to_static_fixed_type (type); | |
836 | if (ada_is_constrained_packed_array_type (type)) | |
837 | type = ada_coerce_to_simple_array_type (type); | |
838 | return type; | |
839 | } | |
840 | ||
4c4b4cd2 | 841 | \f |
76a01679 | 842 | |
dda83cd7 | 843 | /* Language Selection */ |
14f9c5c9 AS |
844 | |
845 | /* If the main program is in Ada, return language_ada, otherwise return LANG | |
ccefe4c4 | 846 | (the main program is in Ada iif the adainit symbol is found). */ |
d2e4a39e | 847 | |
de93309a | 848 | static enum language |
ccefe4c4 | 849 | ada_update_initial_language (enum language lang) |
14f9c5c9 | 850 | { |
cafb3438 | 851 | if (lookup_minimal_symbol ("adainit", NULL, NULL).minsym != NULL) |
4c4b4cd2 | 852 | return language_ada; |
14f9c5c9 AS |
853 | |
854 | return lang; | |
855 | } | |
96d887e8 PH |
856 | |
857 | /* If the main procedure is written in Ada, then return its name. | |
858 | The result is good until the next call. Return NULL if the main | |
859 | procedure doesn't appear to be in Ada. */ | |
860 | ||
861 | char * | |
862 | ada_main_name (void) | |
863 | { | |
3b7344d5 | 864 | struct bound_minimal_symbol msym; |
e83e4e24 | 865 | static gdb::unique_xmalloc_ptr<char> main_program_name; |
6c038f32 | 866 | |
96d887e8 PH |
867 | /* For Ada, the name of the main procedure is stored in a specific |
868 | string constant, generated by the binder. Look for that symbol, | |
869 | extract its address, and then read that string. If we didn't find | |
870 | that string, then most probably the main procedure is not written | |
871 | in Ada. */ | |
872 | msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL); | |
873 | ||
3b7344d5 | 874 | if (msym.minsym != NULL) |
96d887e8 | 875 | { |
66920317 | 876 | CORE_ADDR main_program_name_addr = BMSYMBOL_VALUE_ADDRESS (msym); |
96d887e8 | 877 | if (main_program_name_addr == 0) |
dda83cd7 | 878 | error (_("Invalid address for Ada main program name.")); |
96d887e8 | 879 | |
66920317 | 880 | main_program_name = target_read_string (main_program_name_addr, 1024); |
e83e4e24 | 881 | return main_program_name.get (); |
96d887e8 PH |
882 | } |
883 | ||
884 | /* The main procedure doesn't seem to be in Ada. */ | |
885 | return NULL; | |
886 | } | |
14f9c5c9 | 887 | \f |
dda83cd7 | 888 | /* Symbols */ |
d2e4a39e | 889 | |
4c4b4cd2 PH |
890 | /* Table of Ada operators and their GNAT-encoded names. Last entry is pair |
891 | of NULLs. */ | |
14f9c5c9 | 892 | |
d2e4a39e AS |
893 | const struct ada_opname_map ada_opname_table[] = { |
894 | {"Oadd", "\"+\"", BINOP_ADD}, | |
895 | {"Osubtract", "\"-\"", BINOP_SUB}, | |
896 | {"Omultiply", "\"*\"", BINOP_MUL}, | |
897 | {"Odivide", "\"/\"", BINOP_DIV}, | |
898 | {"Omod", "\"mod\"", BINOP_MOD}, | |
899 | {"Orem", "\"rem\"", BINOP_REM}, | |
900 | {"Oexpon", "\"**\"", BINOP_EXP}, | |
901 | {"Olt", "\"<\"", BINOP_LESS}, | |
902 | {"Ole", "\"<=\"", BINOP_LEQ}, | |
903 | {"Ogt", "\">\"", BINOP_GTR}, | |
904 | {"Oge", "\">=\"", BINOP_GEQ}, | |
905 | {"Oeq", "\"=\"", BINOP_EQUAL}, | |
906 | {"One", "\"/=\"", BINOP_NOTEQUAL}, | |
907 | {"Oand", "\"and\"", BINOP_BITWISE_AND}, | |
908 | {"Oor", "\"or\"", BINOP_BITWISE_IOR}, | |
909 | {"Oxor", "\"xor\"", BINOP_BITWISE_XOR}, | |
910 | {"Oconcat", "\"&\"", BINOP_CONCAT}, | |
911 | {"Oabs", "\"abs\"", UNOP_ABS}, | |
912 | {"Onot", "\"not\"", UNOP_LOGICAL_NOT}, | |
913 | {"Oadd", "\"+\"", UNOP_PLUS}, | |
914 | {"Osubtract", "\"-\"", UNOP_NEG}, | |
915 | {NULL, NULL} | |
14f9c5c9 AS |
916 | }; |
917 | ||
5c4258f4 | 918 | /* The "encoded" form of DECODED, according to GNAT conventions. If |
b5ec771e | 919 | THROW_ERRORS, throw an error if invalid operator name is found. |
5c4258f4 | 920 | Otherwise, return the empty string in that case. */ |
4c4b4cd2 | 921 | |
5c4258f4 | 922 | static std::string |
b5ec771e | 923 | ada_encode_1 (const char *decoded, bool throw_errors) |
14f9c5c9 | 924 | { |
4c4b4cd2 | 925 | if (decoded == NULL) |
5c4258f4 | 926 | return {}; |
14f9c5c9 | 927 | |
5c4258f4 TT |
928 | std::string encoding_buffer; |
929 | for (const char *p = decoded; *p != '\0'; p += 1) | |
14f9c5c9 | 930 | { |
cdc7bb92 | 931 | if (*p == '.') |
5c4258f4 | 932 | encoding_buffer.append ("__"); |
14f9c5c9 | 933 | else if (*p == '"') |
dda83cd7 SM |
934 | { |
935 | const struct ada_opname_map *mapping; | |
936 | ||
937 | for (mapping = ada_opname_table; | |
938 | mapping->encoded != NULL | |
939 | && !startswith (p, mapping->decoded); mapping += 1) | |
940 | ; | |
941 | if (mapping->encoded == NULL) | |
b5ec771e PA |
942 | { |
943 | if (throw_errors) | |
944 | error (_("invalid Ada operator name: %s"), p); | |
945 | else | |
5c4258f4 | 946 | return {}; |
b5ec771e | 947 | } |
5c4258f4 | 948 | encoding_buffer.append (mapping->encoded); |
dda83cd7 SM |
949 | break; |
950 | } | |
d2e4a39e | 951 | else |
5c4258f4 | 952 | encoding_buffer.push_back (*p); |
14f9c5c9 AS |
953 | } |
954 | ||
4c4b4cd2 | 955 | return encoding_buffer; |
14f9c5c9 AS |
956 | } |
957 | ||
5c4258f4 | 958 | /* The "encoded" form of DECODED, according to GNAT conventions. */ |
b5ec771e | 959 | |
5c4258f4 | 960 | std::string |
b5ec771e PA |
961 | ada_encode (const char *decoded) |
962 | { | |
963 | return ada_encode_1 (decoded, true); | |
964 | } | |
965 | ||
14f9c5c9 | 966 | /* Return NAME folded to lower case, or, if surrounded by single |
4c4b4cd2 PH |
967 | quotes, unfolded, but with the quotes stripped away. Result good |
968 | to next call. */ | |
969 | ||
de93309a | 970 | static char * |
e0802d59 | 971 | ada_fold_name (gdb::string_view name) |
14f9c5c9 | 972 | { |
d2e4a39e | 973 | static char *fold_buffer = NULL; |
14f9c5c9 AS |
974 | static size_t fold_buffer_size = 0; |
975 | ||
e0802d59 | 976 | int len = name.size (); |
d2e4a39e | 977 | GROW_VECT (fold_buffer, fold_buffer_size, len + 1); |
14f9c5c9 AS |
978 | |
979 | if (name[0] == '\'') | |
980 | { | |
e0802d59 | 981 | strncpy (fold_buffer, name.data () + 1, len - 2); |
d2e4a39e | 982 | fold_buffer[len - 2] = '\000'; |
14f9c5c9 AS |
983 | } |
984 | else | |
985 | { | |
986 | int i; | |
5b4ee69b | 987 | |
2ccee230 | 988 | for (i = 0; i < len; i += 1) |
dda83cd7 | 989 | fold_buffer[i] = tolower (name[i]); |
2ccee230 | 990 | fold_buffer[i] = '\0'; |
14f9c5c9 AS |
991 | } |
992 | ||
993 | return fold_buffer; | |
994 | } | |
995 | ||
529cad9c PH |
996 | /* Return nonzero if C is either a digit or a lowercase alphabet character. */ |
997 | ||
998 | static int | |
999 | is_lower_alphanum (const char c) | |
1000 | { | |
1001 | return (isdigit (c) || (isalpha (c) && islower (c))); | |
1002 | } | |
1003 | ||
c90092fe JB |
1004 | /* ENCODED is the linkage name of a symbol and LEN contains its length. |
1005 | This function saves in LEN the length of that same symbol name but | |
1006 | without either of these suffixes: | |
29480c32 JB |
1007 | . .{DIGIT}+ |
1008 | . ${DIGIT}+ | |
1009 | . ___{DIGIT}+ | |
1010 | . __{DIGIT}+. | |
c90092fe | 1011 | |
29480c32 JB |
1012 | These are suffixes introduced by the compiler for entities such as |
1013 | nested subprogram for instance, in order to avoid name clashes. | |
1014 | They do not serve any purpose for the debugger. */ | |
1015 | ||
1016 | static void | |
1017 | ada_remove_trailing_digits (const char *encoded, int *len) | |
1018 | { | |
1019 | if (*len > 1 && isdigit (encoded[*len - 1])) | |
1020 | { | |
1021 | int i = *len - 2; | |
5b4ee69b | 1022 | |
29480c32 | 1023 | while (i > 0 && isdigit (encoded[i])) |
dda83cd7 | 1024 | i--; |
29480c32 | 1025 | if (i >= 0 && encoded[i] == '.') |
dda83cd7 | 1026 | *len = i; |
29480c32 | 1027 | else if (i >= 0 && encoded[i] == '$') |
dda83cd7 | 1028 | *len = i; |
61012eef | 1029 | else if (i >= 2 && startswith (encoded + i - 2, "___")) |
dda83cd7 | 1030 | *len = i - 2; |
61012eef | 1031 | else if (i >= 1 && startswith (encoded + i - 1, "__")) |
dda83cd7 | 1032 | *len = i - 1; |
29480c32 JB |
1033 | } |
1034 | } | |
1035 | ||
1036 | /* Remove the suffix introduced by the compiler for protected object | |
1037 | subprograms. */ | |
1038 | ||
1039 | static void | |
1040 | ada_remove_po_subprogram_suffix (const char *encoded, int *len) | |
1041 | { | |
1042 | /* Remove trailing N. */ | |
1043 | ||
1044 | /* Protected entry subprograms are broken into two | |
1045 | separate subprograms: The first one is unprotected, and has | |
1046 | a 'N' suffix; the second is the protected version, and has | |
0963b4bd | 1047 | the 'P' suffix. The second calls the first one after handling |
29480c32 JB |
1048 | the protection. Since the P subprograms are internally generated, |
1049 | we leave these names undecoded, giving the user a clue that this | |
1050 | entity is internal. */ | |
1051 | ||
1052 | if (*len > 1 | |
1053 | && encoded[*len - 1] == 'N' | |
1054 | && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2]))) | |
1055 | *len = *len - 1; | |
1056 | } | |
1057 | ||
1058 | /* If ENCODED follows the GNAT entity encoding conventions, then return | |
1059 | the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is | |
f945dedf | 1060 | replaced by ENCODED. */ |
14f9c5c9 | 1061 | |
f945dedf | 1062 | std::string |
4c4b4cd2 | 1063 | ada_decode (const char *encoded) |
14f9c5c9 AS |
1064 | { |
1065 | int i, j; | |
1066 | int len0; | |
d2e4a39e | 1067 | const char *p; |
14f9c5c9 | 1068 | int at_start_name; |
f945dedf | 1069 | std::string decoded; |
d2e4a39e | 1070 | |
0d81f350 JG |
1071 | /* With function descriptors on PPC64, the value of a symbol named |
1072 | ".FN", if it exists, is the entry point of the function "FN". */ | |
1073 | if (encoded[0] == '.') | |
1074 | encoded += 1; | |
1075 | ||
29480c32 JB |
1076 | /* The name of the Ada main procedure starts with "_ada_". |
1077 | This prefix is not part of the decoded name, so skip this part | |
1078 | if we see this prefix. */ | |
61012eef | 1079 | if (startswith (encoded, "_ada_")) |
4c4b4cd2 | 1080 | encoded += 5; |
14f9c5c9 | 1081 | |
29480c32 JB |
1082 | /* If the name starts with '_', then it is not a properly encoded |
1083 | name, so do not attempt to decode it. Similarly, if the name | |
1084 | starts with '<', the name should not be decoded. */ | |
4c4b4cd2 | 1085 | if (encoded[0] == '_' || encoded[0] == '<') |
14f9c5c9 AS |
1086 | goto Suppress; |
1087 | ||
4c4b4cd2 | 1088 | len0 = strlen (encoded); |
4c4b4cd2 | 1089 | |
29480c32 JB |
1090 | ada_remove_trailing_digits (encoded, &len0); |
1091 | ada_remove_po_subprogram_suffix (encoded, &len0); | |
529cad9c | 1092 | |
4c4b4cd2 PH |
1093 | /* Remove the ___X.* suffix if present. Do not forget to verify that |
1094 | the suffix is located before the current "end" of ENCODED. We want | |
1095 | to avoid re-matching parts of ENCODED that have previously been | |
1096 | marked as discarded (by decrementing LEN0). */ | |
1097 | p = strstr (encoded, "___"); | |
1098 | if (p != NULL && p - encoded < len0 - 3) | |
14f9c5c9 AS |
1099 | { |
1100 | if (p[3] == 'X') | |
dda83cd7 | 1101 | len0 = p - encoded; |
14f9c5c9 | 1102 | else |
dda83cd7 | 1103 | goto Suppress; |
14f9c5c9 | 1104 | } |
4c4b4cd2 | 1105 | |
29480c32 JB |
1106 | /* Remove any trailing TKB suffix. It tells us that this symbol |
1107 | is for the body of a task, but that information does not actually | |
1108 | appear in the decoded name. */ | |
1109 | ||
61012eef | 1110 | if (len0 > 3 && startswith (encoded + len0 - 3, "TKB")) |
14f9c5c9 | 1111 | len0 -= 3; |
76a01679 | 1112 | |
a10967fa JB |
1113 | /* Remove any trailing TB suffix. The TB suffix is slightly different |
1114 | from the TKB suffix because it is used for non-anonymous task | |
1115 | bodies. */ | |
1116 | ||
61012eef | 1117 | if (len0 > 2 && startswith (encoded + len0 - 2, "TB")) |
a10967fa JB |
1118 | len0 -= 2; |
1119 | ||
29480c32 JB |
1120 | /* Remove trailing "B" suffixes. */ |
1121 | /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */ | |
1122 | ||
61012eef | 1123 | if (len0 > 1 && startswith (encoded + len0 - 1, "B")) |
14f9c5c9 AS |
1124 | len0 -= 1; |
1125 | ||
4c4b4cd2 | 1126 | /* Make decoded big enough for possible expansion by operator name. */ |
29480c32 | 1127 | |
f945dedf | 1128 | decoded.resize (2 * len0 + 1, 'X'); |
14f9c5c9 | 1129 | |
29480c32 JB |
1130 | /* Remove trailing __{digit}+ or trailing ${digit}+. */ |
1131 | ||
4c4b4cd2 | 1132 | if (len0 > 1 && isdigit (encoded[len0 - 1])) |
d2e4a39e | 1133 | { |
4c4b4cd2 PH |
1134 | i = len0 - 2; |
1135 | while ((i >= 0 && isdigit (encoded[i])) | |
dda83cd7 SM |
1136 | || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1]))) |
1137 | i -= 1; | |
4c4b4cd2 | 1138 | if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_') |
dda83cd7 | 1139 | len0 = i - 1; |
4c4b4cd2 | 1140 | else if (encoded[i] == '$') |
dda83cd7 | 1141 | len0 = i; |
d2e4a39e | 1142 | } |
14f9c5c9 | 1143 | |
29480c32 JB |
1144 | /* The first few characters that are not alphabetic are not part |
1145 | of any encoding we use, so we can copy them over verbatim. */ | |
1146 | ||
4c4b4cd2 PH |
1147 | for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1) |
1148 | decoded[j] = encoded[i]; | |
14f9c5c9 AS |
1149 | |
1150 | at_start_name = 1; | |
1151 | while (i < len0) | |
1152 | { | |
29480c32 | 1153 | /* Is this a symbol function? */ |
4c4b4cd2 | 1154 | if (at_start_name && encoded[i] == 'O') |
dda83cd7 SM |
1155 | { |
1156 | int k; | |
1157 | ||
1158 | for (k = 0; ada_opname_table[k].encoded != NULL; k += 1) | |
1159 | { | |
1160 | int op_len = strlen (ada_opname_table[k].encoded); | |
1161 | if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1, | |
1162 | op_len - 1) == 0) | |
1163 | && !isalnum (encoded[i + op_len])) | |
1164 | { | |
1165 | strcpy (&decoded.front() + j, ada_opname_table[k].decoded); | |
1166 | at_start_name = 0; | |
1167 | i += op_len; | |
1168 | j += strlen (ada_opname_table[k].decoded); | |
1169 | break; | |
1170 | } | |
1171 | } | |
1172 | if (ada_opname_table[k].encoded != NULL) | |
1173 | continue; | |
1174 | } | |
14f9c5c9 AS |
1175 | at_start_name = 0; |
1176 | ||
529cad9c | 1177 | /* Replace "TK__" with "__", which will eventually be translated |
dda83cd7 | 1178 | into "." (just below). */ |
529cad9c | 1179 | |
61012eef | 1180 | if (i < len0 - 4 && startswith (encoded + i, "TK__")) |
dda83cd7 | 1181 | i += 2; |
529cad9c | 1182 | |
29480c32 | 1183 | /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually |
dda83cd7 SM |
1184 | be translated into "." (just below). These are internal names |
1185 | generated for anonymous blocks inside which our symbol is nested. */ | |
29480c32 JB |
1186 | |
1187 | if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_' | |
dda83cd7 SM |
1188 | && encoded [i+2] == 'B' && encoded [i+3] == '_' |
1189 | && isdigit (encoded [i+4])) | |
1190 | { | |
1191 | int k = i + 5; | |
1192 | ||
1193 | while (k < len0 && isdigit (encoded[k])) | |
1194 | k++; /* Skip any extra digit. */ | |
1195 | ||
1196 | /* Double-check that the "__B_{DIGITS}+" sequence we found | |
1197 | is indeed followed by "__". */ | |
1198 | if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_') | |
1199 | i = k; | |
1200 | } | |
29480c32 | 1201 | |
529cad9c PH |
1202 | /* Remove _E{DIGITS}+[sb] */ |
1203 | ||
1204 | /* Just as for protected object subprograms, there are 2 categories | |
dda83cd7 SM |
1205 | of subprograms created by the compiler for each entry. The first |
1206 | one implements the actual entry code, and has a suffix following | |
1207 | the convention above; the second one implements the barrier and | |
1208 | uses the same convention as above, except that the 'E' is replaced | |
1209 | by a 'B'. | |
529cad9c | 1210 | |
dda83cd7 SM |
1211 | Just as above, we do not decode the name of barrier functions |
1212 | to give the user a clue that the code he is debugging has been | |
1213 | internally generated. */ | |
529cad9c PH |
1214 | |
1215 | if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E' | |
dda83cd7 SM |
1216 | && isdigit (encoded[i+2])) |
1217 | { | |
1218 | int k = i + 3; | |
1219 | ||
1220 | while (k < len0 && isdigit (encoded[k])) | |
1221 | k++; | |
1222 | ||
1223 | if (k < len0 | |
1224 | && (encoded[k] == 'b' || encoded[k] == 's')) | |
1225 | { | |
1226 | k++; | |
1227 | /* Just as an extra precaution, make sure that if this | |
1228 | suffix is followed by anything else, it is a '_'. | |
1229 | Otherwise, we matched this sequence by accident. */ | |
1230 | if (k == len0 | |
1231 | || (k < len0 && encoded[k] == '_')) | |
1232 | i = k; | |
1233 | } | |
1234 | } | |
529cad9c PH |
1235 | |
1236 | /* Remove trailing "N" in [a-z0-9]+N__. The N is added by | |
dda83cd7 | 1237 | the GNAT front-end in protected object subprograms. */ |
529cad9c PH |
1238 | |
1239 | if (i < len0 + 3 | |
dda83cd7 SM |
1240 | && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_') |
1241 | { | |
1242 | /* Backtrack a bit up until we reach either the begining of | |
1243 | the encoded name, or "__". Make sure that we only find | |
1244 | digits or lowercase characters. */ | |
1245 | const char *ptr = encoded + i - 1; | |
1246 | ||
1247 | while (ptr >= encoded && is_lower_alphanum (ptr[0])) | |
1248 | ptr--; | |
1249 | if (ptr < encoded | |
1250 | || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_')) | |
1251 | i++; | |
1252 | } | |
529cad9c | 1253 | |
4c4b4cd2 | 1254 | if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1])) |
dda83cd7 SM |
1255 | { |
1256 | /* This is a X[bn]* sequence not separated from the previous | |
1257 | part of the name with a non-alpha-numeric character (in other | |
1258 | words, immediately following an alpha-numeric character), then | |
1259 | verify that it is placed at the end of the encoded name. If | |
1260 | not, then the encoding is not valid and we should abort the | |
1261 | decoding. Otherwise, just skip it, it is used in body-nested | |
1262 | package names. */ | |
1263 | do | |
1264 | i += 1; | |
1265 | while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n')); | |
1266 | if (i < len0) | |
1267 | goto Suppress; | |
1268 | } | |
cdc7bb92 | 1269 | else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_') |
dda83cd7 SM |
1270 | { |
1271 | /* Replace '__' by '.'. */ | |
1272 | decoded[j] = '.'; | |
1273 | at_start_name = 1; | |
1274 | i += 2; | |
1275 | j += 1; | |
1276 | } | |
14f9c5c9 | 1277 | else |
dda83cd7 SM |
1278 | { |
1279 | /* It's a character part of the decoded name, so just copy it | |
1280 | over. */ | |
1281 | decoded[j] = encoded[i]; | |
1282 | i += 1; | |
1283 | j += 1; | |
1284 | } | |
14f9c5c9 | 1285 | } |
f945dedf | 1286 | decoded.resize (j); |
14f9c5c9 | 1287 | |
29480c32 JB |
1288 | /* Decoded names should never contain any uppercase character. |
1289 | Double-check this, and abort the decoding if we find one. */ | |
1290 | ||
f945dedf | 1291 | for (i = 0; i < decoded.length(); ++i) |
4c4b4cd2 | 1292 | if (isupper (decoded[i]) || decoded[i] == ' ') |
14f9c5c9 AS |
1293 | goto Suppress; |
1294 | ||
f945dedf | 1295 | return decoded; |
14f9c5c9 AS |
1296 | |
1297 | Suppress: | |
4c4b4cd2 | 1298 | if (encoded[0] == '<') |
f945dedf | 1299 | decoded = encoded; |
14f9c5c9 | 1300 | else |
f945dedf | 1301 | decoded = '<' + std::string(encoded) + '>'; |
4c4b4cd2 PH |
1302 | return decoded; |
1303 | ||
1304 | } | |
1305 | ||
1306 | /* Table for keeping permanent unique copies of decoded names. Once | |
1307 | allocated, names in this table are never released. While this is a | |
1308 | storage leak, it should not be significant unless there are massive | |
1309 | changes in the set of decoded names in successive versions of a | |
1310 | symbol table loaded during a single session. */ | |
1311 | static struct htab *decoded_names_store; | |
1312 | ||
1313 | /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it | |
1314 | in the language-specific part of GSYMBOL, if it has not been | |
1315 | previously computed. Tries to save the decoded name in the same | |
1316 | obstack as GSYMBOL, if possible, and otherwise on the heap (so that, | |
1317 | in any case, the decoded symbol has a lifetime at least that of | |
0963b4bd | 1318 | GSYMBOL). |
4c4b4cd2 PH |
1319 | The GSYMBOL parameter is "mutable" in the C++ sense: logically |
1320 | const, but nevertheless modified to a semantically equivalent form | |
0963b4bd | 1321 | when a decoded name is cached in it. */ |
4c4b4cd2 | 1322 | |
45e6c716 | 1323 | const char * |
f85f34ed | 1324 | ada_decode_symbol (const struct general_symbol_info *arg) |
4c4b4cd2 | 1325 | { |
f85f34ed TT |
1326 | struct general_symbol_info *gsymbol = (struct general_symbol_info *) arg; |
1327 | const char **resultp = | |
615b3f62 | 1328 | &gsymbol->language_specific.demangled_name; |
5b4ee69b | 1329 | |
f85f34ed | 1330 | if (!gsymbol->ada_mangled) |
4c4b4cd2 | 1331 | { |
4d4eaa30 | 1332 | std::string decoded = ada_decode (gsymbol->linkage_name ()); |
f85f34ed | 1333 | struct obstack *obstack = gsymbol->language_specific.obstack; |
5b4ee69b | 1334 | |
f85f34ed | 1335 | gsymbol->ada_mangled = 1; |
5b4ee69b | 1336 | |
f85f34ed | 1337 | if (obstack != NULL) |
f945dedf | 1338 | *resultp = obstack_strdup (obstack, decoded.c_str ()); |
f85f34ed | 1339 | else |
dda83cd7 | 1340 | { |
f85f34ed TT |
1341 | /* Sometimes, we can't find a corresponding objfile, in |
1342 | which case, we put the result on the heap. Since we only | |
1343 | decode when needed, we hope this usually does not cause a | |
1344 | significant memory leak (FIXME). */ | |
1345 | ||
dda83cd7 SM |
1346 | char **slot = (char **) htab_find_slot (decoded_names_store, |
1347 | decoded.c_str (), INSERT); | |
5b4ee69b | 1348 | |
dda83cd7 SM |
1349 | if (*slot == NULL) |
1350 | *slot = xstrdup (decoded.c_str ()); | |
1351 | *resultp = *slot; | |
1352 | } | |
4c4b4cd2 | 1353 | } |
14f9c5c9 | 1354 | |
4c4b4cd2 PH |
1355 | return *resultp; |
1356 | } | |
76a01679 | 1357 | |
2c0b251b | 1358 | static char * |
76a01679 | 1359 | ada_la_decode (const char *encoded, int options) |
4c4b4cd2 | 1360 | { |
f945dedf | 1361 | return xstrdup (ada_decode (encoded).c_str ()); |
14f9c5c9 AS |
1362 | } |
1363 | ||
14f9c5c9 | 1364 | \f |
d2e4a39e | 1365 | |
dda83cd7 | 1366 | /* Arrays */ |
14f9c5c9 | 1367 | |
28c85d6c JB |
1368 | /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure |
1369 | generated by the GNAT compiler to describe the index type used | |
1370 | for each dimension of an array, check whether it follows the latest | |
1371 | known encoding. If not, fix it up to conform to the latest encoding. | |
1372 | Otherwise, do nothing. This function also does nothing if | |
1373 | INDEX_DESC_TYPE is NULL. | |
1374 | ||
85102364 | 1375 | The GNAT encoding used to describe the array index type evolved a bit. |
28c85d6c JB |
1376 | Initially, the information would be provided through the name of each |
1377 | field of the structure type only, while the type of these fields was | |
1378 | described as unspecified and irrelevant. The debugger was then expected | |
1379 | to perform a global type lookup using the name of that field in order | |
1380 | to get access to the full index type description. Because these global | |
1381 | lookups can be very expensive, the encoding was later enhanced to make | |
1382 | the global lookup unnecessary by defining the field type as being | |
1383 | the full index type description. | |
1384 | ||
1385 | The purpose of this routine is to allow us to support older versions | |
1386 | of the compiler by detecting the use of the older encoding, and by | |
1387 | fixing up the INDEX_DESC_TYPE to follow the new one (at this point, | |
1388 | we essentially replace each field's meaningless type by the associated | |
1389 | index subtype). */ | |
1390 | ||
1391 | void | |
1392 | ada_fixup_array_indexes_type (struct type *index_desc_type) | |
1393 | { | |
1394 | int i; | |
1395 | ||
1396 | if (index_desc_type == NULL) | |
1397 | return; | |
1f704f76 | 1398 | gdb_assert (index_desc_type->num_fields () > 0); |
28c85d6c JB |
1399 | |
1400 | /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient | |
1401 | to check one field only, no need to check them all). If not, return | |
1402 | now. | |
1403 | ||
1404 | If our INDEX_DESC_TYPE was generated using the older encoding, | |
1405 | the field type should be a meaningless integer type whose name | |
1406 | is not equal to the field name. */ | |
940da03e SM |
1407 | if (index_desc_type->field (0).type ()->name () != NULL |
1408 | && strcmp (index_desc_type->field (0).type ()->name (), | |
dda83cd7 | 1409 | TYPE_FIELD_NAME (index_desc_type, 0)) == 0) |
28c85d6c JB |
1410 | return; |
1411 | ||
1412 | /* Fixup each field of INDEX_DESC_TYPE. */ | |
1f704f76 | 1413 | for (i = 0; i < index_desc_type->num_fields (); i++) |
28c85d6c | 1414 | { |
0d5cff50 | 1415 | const char *name = TYPE_FIELD_NAME (index_desc_type, i); |
28c85d6c JB |
1416 | struct type *raw_type = ada_check_typedef (ada_find_any_type (name)); |
1417 | ||
1418 | if (raw_type) | |
5d14b6e5 | 1419 | index_desc_type->field (i).set_type (raw_type); |
28c85d6c JB |
1420 | } |
1421 | } | |
1422 | ||
4c4b4cd2 PH |
1423 | /* The desc_* routines return primitive portions of array descriptors |
1424 | (fat pointers). */ | |
14f9c5c9 AS |
1425 | |
1426 | /* The descriptor or array type, if any, indicated by TYPE; removes | |
4c4b4cd2 PH |
1427 | level of indirection, if needed. */ |
1428 | ||
d2e4a39e AS |
1429 | static struct type * |
1430 | desc_base_type (struct type *type) | |
14f9c5c9 AS |
1431 | { |
1432 | if (type == NULL) | |
1433 | return NULL; | |
61ee279c | 1434 | type = ada_check_typedef (type); |
78134374 | 1435 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
1436 | type = ada_typedef_target_type (type); |
1437 | ||
1265e4aa | 1438 | if (type != NULL |
78134374 | 1439 | && (type->code () == TYPE_CODE_PTR |
dda83cd7 | 1440 | || type->code () == TYPE_CODE_REF)) |
61ee279c | 1441 | return ada_check_typedef (TYPE_TARGET_TYPE (type)); |
14f9c5c9 AS |
1442 | else |
1443 | return type; | |
1444 | } | |
1445 | ||
4c4b4cd2 PH |
1446 | /* True iff TYPE indicates a "thin" array pointer type. */ |
1447 | ||
14f9c5c9 | 1448 | static int |
d2e4a39e | 1449 | is_thin_pntr (struct type *type) |
14f9c5c9 | 1450 | { |
d2e4a39e | 1451 | return |
14f9c5c9 AS |
1452 | is_suffix (ada_type_name (desc_base_type (type)), "___XUT") |
1453 | || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE"); | |
1454 | } | |
1455 | ||
4c4b4cd2 PH |
1456 | /* The descriptor type for thin pointer type TYPE. */ |
1457 | ||
d2e4a39e AS |
1458 | static struct type * |
1459 | thin_descriptor_type (struct type *type) | |
14f9c5c9 | 1460 | { |
d2e4a39e | 1461 | struct type *base_type = desc_base_type (type); |
5b4ee69b | 1462 | |
14f9c5c9 AS |
1463 | if (base_type == NULL) |
1464 | return NULL; | |
1465 | if (is_suffix (ada_type_name (base_type), "___XVE")) | |
1466 | return base_type; | |
d2e4a39e | 1467 | else |
14f9c5c9 | 1468 | { |
d2e4a39e | 1469 | struct type *alt_type = ada_find_parallel_type (base_type, "___XVE"); |
5b4ee69b | 1470 | |
14f9c5c9 | 1471 | if (alt_type == NULL) |
dda83cd7 | 1472 | return base_type; |
14f9c5c9 | 1473 | else |
dda83cd7 | 1474 | return alt_type; |
14f9c5c9 AS |
1475 | } |
1476 | } | |
1477 | ||
4c4b4cd2 PH |
1478 | /* A pointer to the array data for thin-pointer value VAL. */ |
1479 | ||
d2e4a39e AS |
1480 | static struct value * |
1481 | thin_data_pntr (struct value *val) | |
14f9c5c9 | 1482 | { |
828292f2 | 1483 | struct type *type = ada_check_typedef (value_type (val)); |
556bdfd4 | 1484 | struct type *data_type = desc_data_target_type (thin_descriptor_type (type)); |
5b4ee69b | 1485 | |
556bdfd4 UW |
1486 | data_type = lookup_pointer_type (data_type); |
1487 | ||
78134374 | 1488 | if (type->code () == TYPE_CODE_PTR) |
556bdfd4 | 1489 | return value_cast (data_type, value_copy (val)); |
d2e4a39e | 1490 | else |
42ae5230 | 1491 | return value_from_longest (data_type, value_address (val)); |
14f9c5c9 AS |
1492 | } |
1493 | ||
4c4b4cd2 PH |
1494 | /* True iff TYPE indicates a "thick" array pointer type. */ |
1495 | ||
14f9c5c9 | 1496 | static int |
d2e4a39e | 1497 | is_thick_pntr (struct type *type) |
14f9c5c9 AS |
1498 | { |
1499 | type = desc_base_type (type); | |
78134374 | 1500 | return (type != NULL && type->code () == TYPE_CODE_STRUCT |
dda83cd7 | 1501 | && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL); |
14f9c5c9 AS |
1502 | } |
1503 | ||
4c4b4cd2 PH |
1504 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
1505 | pointer to one, the type of its bounds data; otherwise, NULL. */ | |
76a01679 | 1506 | |
d2e4a39e AS |
1507 | static struct type * |
1508 | desc_bounds_type (struct type *type) | |
14f9c5c9 | 1509 | { |
d2e4a39e | 1510 | struct type *r; |
14f9c5c9 AS |
1511 | |
1512 | type = desc_base_type (type); | |
1513 | ||
1514 | if (type == NULL) | |
1515 | return NULL; | |
1516 | else if (is_thin_pntr (type)) | |
1517 | { | |
1518 | type = thin_descriptor_type (type); | |
1519 | if (type == NULL) | |
dda83cd7 | 1520 | return NULL; |
14f9c5c9 AS |
1521 | r = lookup_struct_elt_type (type, "BOUNDS", 1); |
1522 | if (r != NULL) | |
dda83cd7 | 1523 | return ada_check_typedef (r); |
14f9c5c9 | 1524 | } |
78134374 | 1525 | else if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
1526 | { |
1527 | r = lookup_struct_elt_type (type, "P_BOUNDS", 1); | |
1528 | if (r != NULL) | |
dda83cd7 | 1529 | return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r))); |
14f9c5c9 AS |
1530 | } |
1531 | return NULL; | |
1532 | } | |
1533 | ||
1534 | /* If ARR is an array descriptor (fat or thin pointer), or pointer to | |
4c4b4cd2 PH |
1535 | one, a pointer to its bounds data. Otherwise NULL. */ |
1536 | ||
d2e4a39e AS |
1537 | static struct value * |
1538 | desc_bounds (struct value *arr) | |
14f9c5c9 | 1539 | { |
df407dfe | 1540 | struct type *type = ada_check_typedef (value_type (arr)); |
5b4ee69b | 1541 | |
d2e4a39e | 1542 | if (is_thin_pntr (type)) |
14f9c5c9 | 1543 | { |
d2e4a39e | 1544 | struct type *bounds_type = |
dda83cd7 | 1545 | desc_bounds_type (thin_descriptor_type (type)); |
14f9c5c9 AS |
1546 | LONGEST addr; |
1547 | ||
4cdfadb1 | 1548 | if (bounds_type == NULL) |
dda83cd7 | 1549 | error (_("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1550 | |
1551 | /* NOTE: The following calculation is not really kosher, but | |
dda83cd7 SM |
1552 | since desc_type is an XVE-encoded type (and shouldn't be), |
1553 | the correct calculation is a real pain. FIXME (and fix GCC). */ | |
78134374 | 1554 | if (type->code () == TYPE_CODE_PTR) |
dda83cd7 | 1555 | addr = value_as_long (arr); |
d2e4a39e | 1556 | else |
dda83cd7 | 1557 | addr = value_address (arr); |
14f9c5c9 | 1558 | |
d2e4a39e | 1559 | return |
dda83cd7 SM |
1560 | value_from_longest (lookup_pointer_type (bounds_type), |
1561 | addr - TYPE_LENGTH (bounds_type)); | |
14f9c5c9 AS |
1562 | } |
1563 | ||
1564 | else if (is_thick_pntr (type)) | |
05e522ef JB |
1565 | { |
1566 | struct value *p_bounds = value_struct_elt (&arr, NULL, "P_BOUNDS", NULL, | |
1567 | _("Bad GNAT array descriptor")); | |
1568 | struct type *p_bounds_type = value_type (p_bounds); | |
1569 | ||
1570 | if (p_bounds_type | |
78134374 | 1571 | && p_bounds_type->code () == TYPE_CODE_PTR) |
05e522ef JB |
1572 | { |
1573 | struct type *target_type = TYPE_TARGET_TYPE (p_bounds_type); | |
1574 | ||
e46d3488 | 1575 | if (target_type->is_stub ()) |
05e522ef JB |
1576 | p_bounds = value_cast (lookup_pointer_type |
1577 | (ada_check_typedef (target_type)), | |
1578 | p_bounds); | |
1579 | } | |
1580 | else | |
1581 | error (_("Bad GNAT array descriptor")); | |
1582 | ||
1583 | return p_bounds; | |
1584 | } | |
14f9c5c9 AS |
1585 | else |
1586 | return NULL; | |
1587 | } | |
1588 | ||
4c4b4cd2 PH |
1589 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit |
1590 | position of the field containing the address of the bounds data. */ | |
1591 | ||
14f9c5c9 | 1592 | static int |
d2e4a39e | 1593 | fat_pntr_bounds_bitpos (struct type *type) |
14f9c5c9 AS |
1594 | { |
1595 | return TYPE_FIELD_BITPOS (desc_base_type (type), 1); | |
1596 | } | |
1597 | ||
1598 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1599 | size of the field containing the address of the bounds data. */ |
1600 | ||
14f9c5c9 | 1601 | static int |
d2e4a39e | 1602 | fat_pntr_bounds_bitsize (struct type *type) |
14f9c5c9 AS |
1603 | { |
1604 | type = desc_base_type (type); | |
1605 | ||
d2e4a39e | 1606 | if (TYPE_FIELD_BITSIZE (type, 1) > 0) |
14f9c5c9 AS |
1607 | return TYPE_FIELD_BITSIZE (type, 1); |
1608 | else | |
940da03e | 1609 | return 8 * TYPE_LENGTH (ada_check_typedef (type->field (1).type ())); |
14f9c5c9 AS |
1610 | } |
1611 | ||
4c4b4cd2 | 1612 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
556bdfd4 UW |
1613 | pointer to one, the type of its array data (a array-with-no-bounds type); |
1614 | otherwise, NULL. Use ada_type_of_array to get an array type with bounds | |
1615 | data. */ | |
4c4b4cd2 | 1616 | |
d2e4a39e | 1617 | static struct type * |
556bdfd4 | 1618 | desc_data_target_type (struct type *type) |
14f9c5c9 AS |
1619 | { |
1620 | type = desc_base_type (type); | |
1621 | ||
4c4b4cd2 | 1622 | /* NOTE: The following is bogus; see comment in desc_bounds. */ |
14f9c5c9 | 1623 | if (is_thin_pntr (type)) |
940da03e | 1624 | return desc_base_type (thin_descriptor_type (type)->field (1).type ()); |
14f9c5c9 | 1625 | else if (is_thick_pntr (type)) |
556bdfd4 UW |
1626 | { |
1627 | struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1); | |
1628 | ||
1629 | if (data_type | |
78134374 | 1630 | && ada_check_typedef (data_type)->code () == TYPE_CODE_PTR) |
05e522ef | 1631 | return ada_check_typedef (TYPE_TARGET_TYPE (data_type)); |
556bdfd4 UW |
1632 | } |
1633 | ||
1634 | return NULL; | |
14f9c5c9 AS |
1635 | } |
1636 | ||
1637 | /* If ARR is an array descriptor (fat or thin pointer), a pointer to | |
1638 | its array data. */ | |
4c4b4cd2 | 1639 | |
d2e4a39e AS |
1640 | static struct value * |
1641 | desc_data (struct value *arr) | |
14f9c5c9 | 1642 | { |
df407dfe | 1643 | struct type *type = value_type (arr); |
5b4ee69b | 1644 | |
14f9c5c9 AS |
1645 | if (is_thin_pntr (type)) |
1646 | return thin_data_pntr (arr); | |
1647 | else if (is_thick_pntr (type)) | |
d2e4a39e | 1648 | return value_struct_elt (&arr, NULL, "P_ARRAY", NULL, |
dda83cd7 | 1649 | _("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1650 | else |
1651 | return NULL; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1656 | position of the field containing the address of the data. */ |
1657 | ||
14f9c5c9 | 1658 | static int |
d2e4a39e | 1659 | fat_pntr_data_bitpos (struct type *type) |
14f9c5c9 AS |
1660 | { |
1661 | return TYPE_FIELD_BITPOS (desc_base_type (type), 0); | |
1662 | } | |
1663 | ||
1664 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1665 | size of the field containing the address of the data. */ |
1666 | ||
14f9c5c9 | 1667 | static int |
d2e4a39e | 1668 | fat_pntr_data_bitsize (struct type *type) |
14f9c5c9 AS |
1669 | { |
1670 | type = desc_base_type (type); | |
1671 | ||
1672 | if (TYPE_FIELD_BITSIZE (type, 0) > 0) | |
1673 | return TYPE_FIELD_BITSIZE (type, 0); | |
d2e4a39e | 1674 | else |
940da03e | 1675 | return TARGET_CHAR_BIT * TYPE_LENGTH (type->field (0).type ()); |
14f9c5c9 AS |
1676 | } |
1677 | ||
4c4b4cd2 | 1678 | /* If BOUNDS is an array-bounds structure (or pointer to one), return |
14f9c5c9 | 1679 | the Ith lower bound stored in it, if WHICH is 0, and the Ith upper |
4c4b4cd2 PH |
1680 | bound, if WHICH is 1. The first bound is I=1. */ |
1681 | ||
d2e4a39e AS |
1682 | static struct value * |
1683 | desc_one_bound (struct value *bounds, int i, int which) | |
14f9c5c9 | 1684 | { |
250106a7 TT |
1685 | char bound_name[20]; |
1686 | xsnprintf (bound_name, sizeof (bound_name), "%cB%d", | |
1687 | which ? 'U' : 'L', i - 1); | |
1688 | return value_struct_elt (&bounds, NULL, bound_name, NULL, | |
dda83cd7 | 1689 | _("Bad GNAT array descriptor bounds")); |
14f9c5c9 AS |
1690 | } |
1691 | ||
1692 | /* If BOUNDS is an array-bounds structure type, return the bit position | |
1693 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1694 | bound, if WHICH is 1. The first bound is I=1. */ |
1695 | ||
14f9c5c9 | 1696 | static int |
d2e4a39e | 1697 | desc_bound_bitpos (struct type *type, int i, int which) |
14f9c5c9 | 1698 | { |
d2e4a39e | 1699 | return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2); |
14f9c5c9 AS |
1700 | } |
1701 | ||
1702 | /* If BOUNDS is an array-bounds structure type, return the bit field size | |
1703 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1704 | bound, if WHICH is 1. The first bound is I=1. */ |
1705 | ||
76a01679 | 1706 | static int |
d2e4a39e | 1707 | desc_bound_bitsize (struct type *type, int i, int which) |
14f9c5c9 AS |
1708 | { |
1709 | type = desc_base_type (type); | |
1710 | ||
d2e4a39e AS |
1711 | if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0) |
1712 | return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2); | |
1713 | else | |
940da03e | 1714 | return 8 * TYPE_LENGTH (type->field (2 * i + which - 2).type ()); |
14f9c5c9 AS |
1715 | } |
1716 | ||
1717 | /* If TYPE is the type of an array-bounds structure, the type of its | |
4c4b4cd2 PH |
1718 | Ith bound (numbering from 1). Otherwise, NULL. */ |
1719 | ||
d2e4a39e AS |
1720 | static struct type * |
1721 | desc_index_type (struct type *type, int i) | |
14f9c5c9 AS |
1722 | { |
1723 | type = desc_base_type (type); | |
1724 | ||
78134374 | 1725 | if (type->code () == TYPE_CODE_STRUCT) |
250106a7 TT |
1726 | { |
1727 | char bound_name[20]; | |
1728 | xsnprintf (bound_name, sizeof (bound_name), "LB%d", i - 1); | |
1729 | return lookup_struct_elt_type (type, bound_name, 1); | |
1730 | } | |
d2e4a39e | 1731 | else |
14f9c5c9 AS |
1732 | return NULL; |
1733 | } | |
1734 | ||
4c4b4cd2 PH |
1735 | /* The number of index positions in the array-bounds type TYPE. |
1736 | Return 0 if TYPE is NULL. */ | |
1737 | ||
14f9c5c9 | 1738 | static int |
d2e4a39e | 1739 | desc_arity (struct type *type) |
14f9c5c9 AS |
1740 | { |
1741 | type = desc_base_type (type); | |
1742 | ||
1743 | if (type != NULL) | |
1f704f76 | 1744 | return type->num_fields () / 2; |
14f9c5c9 AS |
1745 | return 0; |
1746 | } | |
1747 | ||
4c4b4cd2 PH |
1748 | /* Non-zero iff TYPE is a simple array type (not a pointer to one) or |
1749 | an array descriptor type (representing an unconstrained array | |
1750 | type). */ | |
1751 | ||
76a01679 JB |
1752 | static int |
1753 | ada_is_direct_array_type (struct type *type) | |
4c4b4cd2 PH |
1754 | { |
1755 | if (type == NULL) | |
1756 | return 0; | |
61ee279c | 1757 | type = ada_check_typedef (type); |
78134374 | 1758 | return (type->code () == TYPE_CODE_ARRAY |
dda83cd7 | 1759 | || ada_is_array_descriptor_type (type)); |
4c4b4cd2 PH |
1760 | } |
1761 | ||
52ce6436 | 1762 | /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer |
0963b4bd | 1763 | * to one. */ |
52ce6436 | 1764 | |
2c0b251b | 1765 | static int |
52ce6436 PH |
1766 | ada_is_array_type (struct type *type) |
1767 | { | |
78134374 SM |
1768 | while (type != NULL |
1769 | && (type->code () == TYPE_CODE_PTR | |
1770 | || type->code () == TYPE_CODE_REF)) | |
52ce6436 PH |
1771 | type = TYPE_TARGET_TYPE (type); |
1772 | return ada_is_direct_array_type (type); | |
1773 | } | |
1774 | ||
4c4b4cd2 | 1775 | /* Non-zero iff TYPE is a simple array type or pointer to one. */ |
14f9c5c9 | 1776 | |
14f9c5c9 | 1777 | int |
4c4b4cd2 | 1778 | ada_is_simple_array_type (struct type *type) |
14f9c5c9 AS |
1779 | { |
1780 | if (type == NULL) | |
1781 | return 0; | |
61ee279c | 1782 | type = ada_check_typedef (type); |
78134374 SM |
1783 | return (type->code () == TYPE_CODE_ARRAY |
1784 | || (type->code () == TYPE_CODE_PTR | |
1785 | && (ada_check_typedef (TYPE_TARGET_TYPE (type))->code () | |
1786 | == TYPE_CODE_ARRAY))); | |
14f9c5c9 AS |
1787 | } |
1788 | ||
4c4b4cd2 PH |
1789 | /* Non-zero iff TYPE belongs to a GNAT array descriptor. */ |
1790 | ||
14f9c5c9 | 1791 | int |
4c4b4cd2 | 1792 | ada_is_array_descriptor_type (struct type *type) |
14f9c5c9 | 1793 | { |
556bdfd4 | 1794 | struct type *data_type = desc_data_target_type (type); |
14f9c5c9 AS |
1795 | |
1796 | if (type == NULL) | |
1797 | return 0; | |
61ee279c | 1798 | type = ada_check_typedef (type); |
556bdfd4 | 1799 | return (data_type != NULL |
78134374 | 1800 | && data_type->code () == TYPE_CODE_ARRAY |
556bdfd4 | 1801 | && desc_arity (desc_bounds_type (type)) > 0); |
14f9c5c9 AS |
1802 | } |
1803 | ||
1804 | /* Non-zero iff type is a partially mal-formed GNAT array | |
4c4b4cd2 | 1805 | descriptor. FIXME: This is to compensate for some problems with |
14f9c5c9 | 1806 | debugging output from GNAT. Re-examine periodically to see if it |
4c4b4cd2 PH |
1807 | is still needed. */ |
1808 | ||
14f9c5c9 | 1809 | int |
ebf56fd3 | 1810 | ada_is_bogus_array_descriptor (struct type *type) |
14f9c5c9 | 1811 | { |
d2e4a39e | 1812 | return |
14f9c5c9 | 1813 | type != NULL |
78134374 | 1814 | && type->code () == TYPE_CODE_STRUCT |
14f9c5c9 | 1815 | && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL |
dda83cd7 | 1816 | || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL) |
4c4b4cd2 | 1817 | && !ada_is_array_descriptor_type (type); |
14f9c5c9 AS |
1818 | } |
1819 | ||
1820 | ||
4c4b4cd2 | 1821 | /* If ARR has a record type in the form of a standard GNAT array descriptor, |
14f9c5c9 | 1822 | (fat pointer) returns the type of the array data described---specifically, |
4c4b4cd2 | 1823 | a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled |
14f9c5c9 | 1824 | in from the descriptor; otherwise, they are left unspecified. If |
4c4b4cd2 PH |
1825 | the ARR denotes a null array descriptor and BOUNDS is non-zero, |
1826 | returns NULL. The result is simply the type of ARR if ARR is not | |
14f9c5c9 | 1827 | a descriptor. */ |
de93309a SM |
1828 | |
1829 | static struct type * | |
d2e4a39e | 1830 | ada_type_of_array (struct value *arr, int bounds) |
14f9c5c9 | 1831 | { |
ad82864c JB |
1832 | if (ada_is_constrained_packed_array_type (value_type (arr))) |
1833 | return decode_constrained_packed_array_type (value_type (arr)); | |
14f9c5c9 | 1834 | |
df407dfe AC |
1835 | if (!ada_is_array_descriptor_type (value_type (arr))) |
1836 | return value_type (arr); | |
d2e4a39e AS |
1837 | |
1838 | if (!bounds) | |
ad82864c JB |
1839 | { |
1840 | struct type *array_type = | |
1841 | ada_check_typedef (desc_data_target_type (value_type (arr))); | |
1842 | ||
1843 | if (ada_is_unconstrained_packed_array_type (value_type (arr))) | |
1844 | TYPE_FIELD_BITSIZE (array_type, 0) = | |
1845 | decode_packed_array_bitsize (value_type (arr)); | |
1846 | ||
1847 | return array_type; | |
1848 | } | |
14f9c5c9 AS |
1849 | else |
1850 | { | |
d2e4a39e | 1851 | struct type *elt_type; |
14f9c5c9 | 1852 | int arity; |
d2e4a39e | 1853 | struct value *descriptor; |
14f9c5c9 | 1854 | |
df407dfe AC |
1855 | elt_type = ada_array_element_type (value_type (arr), -1); |
1856 | arity = ada_array_arity (value_type (arr)); | |
14f9c5c9 | 1857 | |
d2e4a39e | 1858 | if (elt_type == NULL || arity == 0) |
dda83cd7 | 1859 | return ada_check_typedef (value_type (arr)); |
14f9c5c9 AS |
1860 | |
1861 | descriptor = desc_bounds (arr); | |
d2e4a39e | 1862 | if (value_as_long (descriptor) == 0) |
dda83cd7 | 1863 | return NULL; |
d2e4a39e | 1864 | while (arity > 0) |
dda83cd7 SM |
1865 | { |
1866 | struct type *range_type = alloc_type_copy (value_type (arr)); | |
1867 | struct type *array_type = alloc_type_copy (value_type (arr)); | |
1868 | struct value *low = desc_one_bound (descriptor, arity, 0); | |
1869 | struct value *high = desc_one_bound (descriptor, arity, 1); | |
1870 | ||
1871 | arity -= 1; | |
1872 | create_static_range_type (range_type, value_type (low), | |
0c9c3474 SA |
1873 | longest_to_int (value_as_long (low)), |
1874 | longest_to_int (value_as_long (high))); | |
dda83cd7 | 1875 | elt_type = create_array_type (array_type, elt_type, range_type); |
ad82864c JB |
1876 | |
1877 | if (ada_is_unconstrained_packed_array_type (value_type (arr))) | |
e67ad678 JB |
1878 | { |
1879 | /* We need to store the element packed bitsize, as well as | |
dda83cd7 | 1880 | recompute the array size, because it was previously |
e67ad678 JB |
1881 | computed based on the unpacked element size. */ |
1882 | LONGEST lo = value_as_long (low); | |
1883 | LONGEST hi = value_as_long (high); | |
1884 | ||
1885 | TYPE_FIELD_BITSIZE (elt_type, 0) = | |
1886 | decode_packed_array_bitsize (value_type (arr)); | |
1887 | /* If the array has no element, then the size is already | |
dda83cd7 | 1888 | zero, and does not need to be recomputed. */ |
e67ad678 JB |
1889 | if (lo < hi) |
1890 | { | |
1891 | int array_bitsize = | |
dda83cd7 | 1892 | (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0); |
e67ad678 JB |
1893 | |
1894 | TYPE_LENGTH (array_type) = (array_bitsize + 7) / 8; | |
1895 | } | |
1896 | } | |
dda83cd7 | 1897 | } |
14f9c5c9 AS |
1898 | |
1899 | return lookup_pointer_type (elt_type); | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | /* If ARR does not represent an array, returns ARR unchanged. | |
4c4b4cd2 PH |
1904 | Otherwise, returns either a standard GDB array with bounds set |
1905 | appropriately or, if ARR is a non-null fat pointer, a pointer to a standard | |
1906 | GDB array. Returns NULL if ARR is a null fat pointer. */ | |
1907 | ||
d2e4a39e AS |
1908 | struct value * |
1909 | ada_coerce_to_simple_array_ptr (struct value *arr) | |
14f9c5c9 | 1910 | { |
df407dfe | 1911 | if (ada_is_array_descriptor_type (value_type (arr))) |
14f9c5c9 | 1912 | { |
d2e4a39e | 1913 | struct type *arrType = ada_type_of_array (arr, 1); |
5b4ee69b | 1914 | |
14f9c5c9 | 1915 | if (arrType == NULL) |
dda83cd7 | 1916 | return NULL; |
14f9c5c9 AS |
1917 | return value_cast (arrType, value_copy (desc_data (arr))); |
1918 | } | |
ad82864c JB |
1919 | else if (ada_is_constrained_packed_array_type (value_type (arr))) |
1920 | return decode_constrained_packed_array (arr); | |
14f9c5c9 AS |
1921 | else |
1922 | return arr; | |
1923 | } | |
1924 | ||
1925 | /* If ARR does not represent an array, returns ARR unchanged. | |
1926 | Otherwise, returns a standard GDB array describing ARR (which may | |
4c4b4cd2 PH |
1927 | be ARR itself if it already is in the proper form). */ |
1928 | ||
720d1a40 | 1929 | struct value * |
d2e4a39e | 1930 | ada_coerce_to_simple_array (struct value *arr) |
14f9c5c9 | 1931 | { |
df407dfe | 1932 | if (ada_is_array_descriptor_type (value_type (arr))) |
14f9c5c9 | 1933 | { |
d2e4a39e | 1934 | struct value *arrVal = ada_coerce_to_simple_array_ptr (arr); |
5b4ee69b | 1935 | |
14f9c5c9 | 1936 | if (arrVal == NULL) |
dda83cd7 | 1937 | error (_("Bounds unavailable for null array pointer.")); |
c1b5a1a6 | 1938 | ada_ensure_varsize_limit (TYPE_TARGET_TYPE (value_type (arrVal))); |
14f9c5c9 AS |
1939 | return value_ind (arrVal); |
1940 | } | |
ad82864c JB |
1941 | else if (ada_is_constrained_packed_array_type (value_type (arr))) |
1942 | return decode_constrained_packed_array (arr); | |
d2e4a39e | 1943 | else |
14f9c5c9 AS |
1944 | return arr; |
1945 | } | |
1946 | ||
1947 | /* If TYPE represents a GNAT array type, return it translated to an | |
1948 | ordinary GDB array type (possibly with BITSIZE fields indicating | |
4c4b4cd2 PH |
1949 | packing). For other types, is the identity. */ |
1950 | ||
d2e4a39e AS |
1951 | struct type * |
1952 | ada_coerce_to_simple_array_type (struct type *type) | |
14f9c5c9 | 1953 | { |
ad82864c JB |
1954 | if (ada_is_constrained_packed_array_type (type)) |
1955 | return decode_constrained_packed_array_type (type); | |
17280b9f UW |
1956 | |
1957 | if (ada_is_array_descriptor_type (type)) | |
556bdfd4 | 1958 | return ada_check_typedef (desc_data_target_type (type)); |
17280b9f UW |
1959 | |
1960 | return type; | |
14f9c5c9 AS |
1961 | } |
1962 | ||
4c4b4cd2 PH |
1963 | /* Non-zero iff TYPE represents a standard GNAT packed-array type. */ |
1964 | ||
ad82864c | 1965 | static int |
57567375 | 1966 | ada_is_gnat_encoded_packed_array_type (struct type *type) |
14f9c5c9 AS |
1967 | { |
1968 | if (type == NULL) | |
1969 | return 0; | |
4c4b4cd2 | 1970 | type = desc_base_type (type); |
61ee279c | 1971 | type = ada_check_typedef (type); |
d2e4a39e | 1972 | return |
14f9c5c9 AS |
1973 | ada_type_name (type) != NULL |
1974 | && strstr (ada_type_name (type), "___XP") != NULL; | |
1975 | } | |
1976 | ||
ad82864c JB |
1977 | /* Non-zero iff TYPE represents a standard GNAT constrained |
1978 | packed-array type. */ | |
1979 | ||
1980 | int | |
1981 | ada_is_constrained_packed_array_type (struct type *type) | |
1982 | { | |
57567375 | 1983 | return ada_is_gnat_encoded_packed_array_type (type) |
ad82864c JB |
1984 | && !ada_is_array_descriptor_type (type); |
1985 | } | |
1986 | ||
1987 | /* Non-zero iff TYPE represents an array descriptor for a | |
1988 | unconstrained packed-array type. */ | |
1989 | ||
1990 | static int | |
1991 | ada_is_unconstrained_packed_array_type (struct type *type) | |
1992 | { | |
57567375 TT |
1993 | if (!ada_is_array_descriptor_type (type)) |
1994 | return 0; | |
1995 | ||
1996 | if (ada_is_gnat_encoded_packed_array_type (type)) | |
1997 | return 1; | |
1998 | ||
1999 | /* If we saw GNAT encodings, then the above code is sufficient. | |
2000 | However, with minimal encodings, we will just have a thick | |
2001 | pointer instead. */ | |
2002 | if (is_thick_pntr (type)) | |
2003 | { | |
2004 | type = desc_base_type (type); | |
2005 | /* The structure's first field is a pointer to an array, so this | |
2006 | fetches the array type. */ | |
2007 | type = TYPE_TARGET_TYPE (type->field (0).type ()); | |
2008 | /* Now we can see if the array elements are packed. */ | |
2009 | return TYPE_FIELD_BITSIZE (type, 0) > 0; | |
2010 | } | |
2011 | ||
2012 | return 0; | |
ad82864c JB |
2013 | } |
2014 | ||
c9a28cbe TT |
2015 | /* Return true if TYPE is a (Gnat-encoded) constrained packed array |
2016 | type, or if it is an ordinary (non-Gnat-encoded) packed array. */ | |
2017 | ||
2018 | static bool | |
2019 | ada_is_any_packed_array_type (struct type *type) | |
2020 | { | |
2021 | return (ada_is_constrained_packed_array_type (type) | |
2022 | || (type->code () == TYPE_CODE_ARRAY | |
2023 | && TYPE_FIELD_BITSIZE (type, 0) % 8 != 0)); | |
2024 | } | |
2025 | ||
ad82864c JB |
2026 | /* Given that TYPE encodes a packed array type (constrained or unconstrained), |
2027 | return the size of its elements in bits. */ | |
2028 | ||
2029 | static long | |
2030 | decode_packed_array_bitsize (struct type *type) | |
2031 | { | |
0d5cff50 DE |
2032 | const char *raw_name; |
2033 | const char *tail; | |
ad82864c JB |
2034 | long bits; |
2035 | ||
720d1a40 JB |
2036 | /* Access to arrays implemented as fat pointers are encoded as a typedef |
2037 | of the fat pointer type. We need the name of the fat pointer type | |
2038 | to do the decoding, so strip the typedef layer. */ | |
78134374 | 2039 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
2040 | type = ada_typedef_target_type (type); |
2041 | ||
2042 | raw_name = ada_type_name (ada_check_typedef (type)); | |
ad82864c JB |
2043 | if (!raw_name) |
2044 | raw_name = ada_type_name (desc_base_type (type)); | |
2045 | ||
2046 | if (!raw_name) | |
2047 | return 0; | |
2048 | ||
2049 | tail = strstr (raw_name, "___XP"); | |
57567375 TT |
2050 | if (tail == nullptr) |
2051 | { | |
2052 | gdb_assert (is_thick_pntr (type)); | |
2053 | /* The structure's first field is a pointer to an array, so this | |
2054 | fetches the array type. */ | |
2055 | type = TYPE_TARGET_TYPE (type->field (0).type ()); | |
2056 | /* Now we can see if the array elements are packed. */ | |
2057 | return TYPE_FIELD_BITSIZE (type, 0); | |
2058 | } | |
ad82864c JB |
2059 | |
2060 | if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1) | |
2061 | { | |
2062 | lim_warning | |
2063 | (_("could not understand bit size information on packed array")); | |
2064 | return 0; | |
2065 | } | |
2066 | ||
2067 | return bits; | |
2068 | } | |
2069 | ||
14f9c5c9 AS |
2070 | /* Given that TYPE is a standard GDB array type with all bounds filled |
2071 | in, and that the element size of its ultimate scalar constituents | |
2072 | (that is, either its elements, or, if it is an array of arrays, its | |
2073 | elements' elements, etc.) is *ELT_BITS, return an identical type, | |
2074 | but with the bit sizes of its elements (and those of any | |
2075 | constituent arrays) recorded in the BITSIZE components of its | |
4c4b4cd2 | 2076 | TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size |
4a46959e JB |
2077 | in bits. |
2078 | ||
2079 | Note that, for arrays whose index type has an XA encoding where | |
2080 | a bound references a record discriminant, getting that discriminant, | |
2081 | and therefore the actual value of that bound, is not possible | |
2082 | because none of the given parameters gives us access to the record. | |
2083 | This function assumes that it is OK in the context where it is being | |
2084 | used to return an array whose bounds are still dynamic and where | |
2085 | the length is arbitrary. */ | |
4c4b4cd2 | 2086 | |
d2e4a39e | 2087 | static struct type * |
ad82864c | 2088 | constrained_packed_array_type (struct type *type, long *elt_bits) |
14f9c5c9 | 2089 | { |
d2e4a39e AS |
2090 | struct type *new_elt_type; |
2091 | struct type *new_type; | |
99b1c762 JB |
2092 | struct type *index_type_desc; |
2093 | struct type *index_type; | |
14f9c5c9 AS |
2094 | LONGEST low_bound, high_bound; |
2095 | ||
61ee279c | 2096 | type = ada_check_typedef (type); |
78134374 | 2097 | if (type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 AS |
2098 | return type; |
2099 | ||
99b1c762 JB |
2100 | index_type_desc = ada_find_parallel_type (type, "___XA"); |
2101 | if (index_type_desc) | |
940da03e | 2102 | index_type = to_fixed_range_type (index_type_desc->field (0).type (), |
99b1c762 JB |
2103 | NULL); |
2104 | else | |
3d967001 | 2105 | index_type = type->index_type (); |
99b1c762 | 2106 | |
e9bb382b | 2107 | new_type = alloc_type_copy (type); |
ad82864c JB |
2108 | new_elt_type = |
2109 | constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)), | |
2110 | elt_bits); | |
99b1c762 | 2111 | create_array_type (new_type, new_elt_type, index_type); |
14f9c5c9 | 2112 | TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits; |
d0e39ea2 | 2113 | new_type->set_name (ada_type_name (type)); |
14f9c5c9 | 2114 | |
78134374 | 2115 | if ((check_typedef (index_type)->code () == TYPE_CODE_RANGE |
4a46959e | 2116 | && is_dynamic_type (check_typedef (index_type))) |
1f8d2881 | 2117 | || !get_discrete_bounds (index_type, &low_bound, &high_bound)) |
14f9c5c9 AS |
2118 | low_bound = high_bound = 0; |
2119 | if (high_bound < low_bound) | |
2120 | *elt_bits = TYPE_LENGTH (new_type) = 0; | |
d2e4a39e | 2121 | else |
14f9c5c9 AS |
2122 | { |
2123 | *elt_bits *= (high_bound - low_bound + 1); | |
d2e4a39e | 2124 | TYPE_LENGTH (new_type) = |
dda83cd7 | 2125 | (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
14f9c5c9 AS |
2126 | } |
2127 | ||
9cdd0d12 | 2128 | new_type->set_is_fixed_instance (true); |
14f9c5c9 AS |
2129 | return new_type; |
2130 | } | |
2131 | ||
ad82864c JB |
2132 | /* The array type encoded by TYPE, where |
2133 | ada_is_constrained_packed_array_type (TYPE). */ | |
4c4b4cd2 | 2134 | |
d2e4a39e | 2135 | static struct type * |
ad82864c | 2136 | decode_constrained_packed_array_type (struct type *type) |
d2e4a39e | 2137 | { |
0d5cff50 | 2138 | const char *raw_name = ada_type_name (ada_check_typedef (type)); |
727e3d2e | 2139 | char *name; |
0d5cff50 | 2140 | const char *tail; |
d2e4a39e | 2141 | struct type *shadow_type; |
14f9c5c9 | 2142 | long bits; |
14f9c5c9 | 2143 | |
727e3d2e JB |
2144 | if (!raw_name) |
2145 | raw_name = ada_type_name (desc_base_type (type)); | |
2146 | ||
2147 | if (!raw_name) | |
2148 | return NULL; | |
2149 | ||
2150 | name = (char *) alloca (strlen (raw_name) + 1); | |
2151 | tail = strstr (raw_name, "___XP"); | |
4c4b4cd2 PH |
2152 | type = desc_base_type (type); |
2153 | ||
14f9c5c9 AS |
2154 | memcpy (name, raw_name, tail - raw_name); |
2155 | name[tail - raw_name] = '\000'; | |
2156 | ||
b4ba55a1 JB |
2157 | shadow_type = ada_find_parallel_type_with_name (type, name); |
2158 | ||
2159 | if (shadow_type == NULL) | |
14f9c5c9 | 2160 | { |
323e0a4a | 2161 | lim_warning (_("could not find bounds information on packed array")); |
14f9c5c9 AS |
2162 | return NULL; |
2163 | } | |
f168693b | 2164 | shadow_type = check_typedef (shadow_type); |
14f9c5c9 | 2165 | |
78134374 | 2166 | if (shadow_type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 | 2167 | { |
0963b4bd MS |
2168 | lim_warning (_("could not understand bounds " |
2169 | "information on packed array")); | |
14f9c5c9 AS |
2170 | return NULL; |
2171 | } | |
d2e4a39e | 2172 | |
ad82864c JB |
2173 | bits = decode_packed_array_bitsize (type); |
2174 | return constrained_packed_array_type (shadow_type, &bits); | |
14f9c5c9 AS |
2175 | } |
2176 | ||
a7400e44 TT |
2177 | /* Helper function for decode_constrained_packed_array. Set the field |
2178 | bitsize on a series of packed arrays. Returns the number of | |
2179 | elements in TYPE. */ | |
2180 | ||
2181 | static LONGEST | |
2182 | recursively_update_array_bitsize (struct type *type) | |
2183 | { | |
2184 | gdb_assert (type->code () == TYPE_CODE_ARRAY); | |
2185 | ||
2186 | LONGEST low, high; | |
1f8d2881 | 2187 | if (!get_discrete_bounds (type->index_type (), &low, &high) |
a7400e44 TT |
2188 | || low > high) |
2189 | return 0; | |
2190 | LONGEST our_len = high - low + 1; | |
2191 | ||
2192 | struct type *elt_type = TYPE_TARGET_TYPE (type); | |
2193 | if (elt_type->code () == TYPE_CODE_ARRAY) | |
2194 | { | |
2195 | LONGEST elt_len = recursively_update_array_bitsize (elt_type); | |
2196 | LONGEST elt_bitsize = elt_len * TYPE_FIELD_BITSIZE (elt_type, 0); | |
2197 | TYPE_FIELD_BITSIZE (type, 0) = elt_bitsize; | |
2198 | ||
2199 | TYPE_LENGTH (type) = ((our_len * elt_bitsize + HOST_CHAR_BIT - 1) | |
2200 | / HOST_CHAR_BIT); | |
2201 | } | |
2202 | ||
2203 | return our_len; | |
2204 | } | |
2205 | ||
ad82864c JB |
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 | |
14f9c5c9 AS |
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 | |
4c4b4cd2 | 2210 | type length is set appropriately. */ |
14f9c5c9 | 2211 | |
d2e4a39e | 2212 | static struct value * |
ad82864c | 2213 | decode_constrained_packed_array (struct value *arr) |
14f9c5c9 | 2214 | { |
4c4b4cd2 | 2215 | struct type *type; |
14f9c5c9 | 2216 | |
11aa919a PMR |
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); | |
78134374 | 2225 | if (ada_check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
284614f0 | 2226 | arr = value_ind (arr); |
4c4b4cd2 | 2227 | |
ad82864c | 2228 | type = decode_constrained_packed_array_type (value_type (arr)); |
14f9c5c9 AS |
2229 | if (type == NULL) |
2230 | { | |
323e0a4a | 2231 | error (_("can't unpack array")); |
14f9c5c9 AS |
2232 | return NULL; |
2233 | } | |
61ee279c | 2234 | |
a7400e44 TT |
2235 | /* Decoding the packed array type could not correctly set the field |
2236 | bitsizes for any dimension except the innermost, because the | |
2237 | bounds may be variable and were not passed to that function. So, | |
2238 | we further resolve the array bounds here and then update the | |
2239 | sizes. */ | |
2240 | const gdb_byte *valaddr = value_contents_for_printing (arr); | |
2241 | CORE_ADDR address = value_address (arr); | |
2242 | gdb::array_view<const gdb_byte> view | |
2243 | = gdb::make_array_view (valaddr, TYPE_LENGTH (type)); | |
2244 | type = resolve_dynamic_type (type, view, address); | |
2245 | recursively_update_array_bitsize (type); | |
2246 | ||
d5a22e77 | 2247 | if (type_byte_order (value_type (arr)) == BFD_ENDIAN_BIG |
32c9a795 | 2248 | && ada_is_modular_type (value_type (arr))) |
61ee279c PH |
2249 | { |
2250 | /* This is a (right-justified) modular type representing a packed | |
2251 | array with no wrapper. In order to interpret the value through | |
2252 | the (left-justified) packed array type we just built, we must | |
2253 | first left-justify it. */ | |
2254 | int bit_size, bit_pos; | |
2255 | ULONGEST mod; | |
2256 | ||
df407dfe | 2257 | mod = ada_modulus (value_type (arr)) - 1; |
61ee279c PH |
2258 | bit_size = 0; |
2259 | while (mod > 0) | |
2260 | { | |
2261 | bit_size += 1; | |
2262 | mod >>= 1; | |
2263 | } | |
df407dfe | 2264 | bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size; |
61ee279c PH |
2265 | arr = ada_value_primitive_packed_val (arr, NULL, |
2266 | bit_pos / HOST_CHAR_BIT, | |
2267 | bit_pos % HOST_CHAR_BIT, | |
2268 | bit_size, | |
2269 | type); | |
2270 | } | |
2271 | ||
4c4b4cd2 | 2272 | return coerce_unspec_val_to_type (arr, type); |
14f9c5c9 AS |
2273 | } |
2274 | ||
2275 | ||
2276 | /* The value of the element of packed array ARR at the ARITY indices | |
4c4b4cd2 | 2277 | given in IND. ARR must be a simple array. */ |
14f9c5c9 | 2278 | |
d2e4a39e AS |
2279 | static struct value * |
2280 | value_subscript_packed (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
2281 | { |
2282 | int i; | |
2283 | int bits, elt_off, bit_off; | |
2284 | long elt_total_bit_offset; | |
d2e4a39e AS |
2285 | struct type *elt_type; |
2286 | struct value *v; | |
14f9c5c9 AS |
2287 | |
2288 | bits = 0; | |
2289 | elt_total_bit_offset = 0; | |
df407dfe | 2290 | elt_type = ada_check_typedef (value_type (arr)); |
d2e4a39e | 2291 | for (i = 0; i < arity; i += 1) |
14f9c5c9 | 2292 | { |
78134374 | 2293 | if (elt_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
2294 | || TYPE_FIELD_BITSIZE (elt_type, 0) == 0) |
2295 | error | |
2296 | (_("attempt to do packed indexing of " | |
0963b4bd | 2297 | "something other than a packed array")); |
14f9c5c9 | 2298 | else |
dda83cd7 SM |
2299 | { |
2300 | struct type *range_type = elt_type->index_type (); | |
2301 | LONGEST lowerbound, upperbound; | |
2302 | LONGEST idx; | |
2303 | ||
1f8d2881 | 2304 | if (!get_discrete_bounds (range_type, &lowerbound, &upperbound)) |
dda83cd7 SM |
2305 | { |
2306 | lim_warning (_("don't know bounds of array")); | |
2307 | lowerbound = upperbound = 0; | |
2308 | } | |
2309 | ||
2310 | idx = pos_atr (ind[i]); | |
2311 | if (idx < lowerbound || idx > upperbound) | |
2312 | lim_warning (_("packed array index %ld out of bounds"), | |
0963b4bd | 2313 | (long) idx); |
dda83cd7 SM |
2314 | bits = TYPE_FIELD_BITSIZE (elt_type, 0); |
2315 | elt_total_bit_offset += (idx - lowerbound) * bits; | |
2316 | elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type)); | |
2317 | } | |
14f9c5c9 AS |
2318 | } |
2319 | elt_off = elt_total_bit_offset / HOST_CHAR_BIT; | |
2320 | bit_off = elt_total_bit_offset % HOST_CHAR_BIT; | |
d2e4a39e AS |
2321 | |
2322 | v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off, | |
dda83cd7 | 2323 | bits, elt_type); |
14f9c5c9 AS |
2324 | return v; |
2325 | } | |
2326 | ||
4c4b4cd2 | 2327 | /* Non-zero iff TYPE includes negative integer values. */ |
14f9c5c9 AS |
2328 | |
2329 | static int | |
d2e4a39e | 2330 | has_negatives (struct type *type) |
14f9c5c9 | 2331 | { |
78134374 | 2332 | switch (type->code ()) |
d2e4a39e AS |
2333 | { |
2334 | default: | |
2335 | return 0; | |
2336 | case TYPE_CODE_INT: | |
c6d940a9 | 2337 | return !type->is_unsigned (); |
d2e4a39e | 2338 | case TYPE_CODE_RANGE: |
5537ddd0 | 2339 | return type->bounds ()->low.const_val () - type->bounds ()->bias < 0; |
d2e4a39e | 2340 | } |
14f9c5c9 | 2341 | } |
d2e4a39e | 2342 | |
f93fca70 | 2343 | /* With SRC being a buffer containing BIT_SIZE bits of data at BIT_OFFSET, |
5b639dea | 2344 | unpack that data into UNPACKED. UNPACKED_LEN is the size in bytes of |
f93fca70 | 2345 | the unpacked buffer. |
14f9c5c9 | 2346 | |
5b639dea JB |
2347 | The size of the unpacked buffer (UNPACKED_LEN) is expected to be large |
2348 | enough to contain at least BIT_OFFSET bits. If not, an error is raised. | |
2349 | ||
f93fca70 JB |
2350 | IS_BIG_ENDIAN is nonzero if the data is stored in big endian mode, |
2351 | zero otherwise. | |
14f9c5c9 | 2352 | |
f93fca70 | 2353 | IS_SIGNED_TYPE is nonzero if the data corresponds to a signed type. |
a1c95e6b | 2354 | |
f93fca70 JB |
2355 | IS_SCALAR is nonzero if the data corresponds to a signed type. */ |
2356 | ||
2357 | static void | |
2358 | ada_unpack_from_contents (const gdb_byte *src, int bit_offset, int bit_size, | |
2359 | gdb_byte *unpacked, int unpacked_len, | |
2360 | int is_big_endian, int is_signed_type, | |
2361 | int is_scalar) | |
2362 | { | |
a1c95e6b JB |
2363 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
2364 | int src_idx; /* Index into the source area */ | |
2365 | int src_bytes_left; /* Number of source bytes left to process. */ | |
2366 | int srcBitsLeft; /* Number of source bits left to move */ | |
2367 | int unusedLS; /* Number of bits in next significant | |
dda83cd7 | 2368 | byte of source that are unused */ |
a1c95e6b | 2369 | |
a1c95e6b JB |
2370 | int unpacked_idx; /* Index into the unpacked buffer */ |
2371 | int unpacked_bytes_left; /* Number of bytes left to set in unpacked. */ | |
2372 | ||
4c4b4cd2 | 2373 | unsigned long accum; /* Staging area for bits being transferred */ |
a1c95e6b | 2374 | int accumSize; /* Number of meaningful bits in accum */ |
14f9c5c9 | 2375 | unsigned char sign; |
a1c95e6b | 2376 | |
4c4b4cd2 PH |
2377 | /* Transmit bytes from least to most significant; delta is the direction |
2378 | the indices move. */ | |
f93fca70 | 2379 | int delta = is_big_endian ? -1 : 1; |
14f9c5c9 | 2380 | |
5b639dea JB |
2381 | /* Make sure that unpacked is large enough to receive the BIT_SIZE |
2382 | bits from SRC. .*/ | |
2383 | if ((bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT > unpacked_len) | |
2384 | error (_("Cannot unpack %d bits into buffer of %d bytes"), | |
2385 | bit_size, unpacked_len); | |
2386 | ||
14f9c5c9 | 2387 | srcBitsLeft = bit_size; |
086ca51f | 2388 | src_bytes_left = src_len; |
f93fca70 | 2389 | unpacked_bytes_left = unpacked_len; |
14f9c5c9 | 2390 | sign = 0; |
f93fca70 JB |
2391 | |
2392 | if (is_big_endian) | |
14f9c5c9 | 2393 | { |
086ca51f | 2394 | src_idx = src_len - 1; |
f93fca70 JB |
2395 | if (is_signed_type |
2396 | && ((src[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1)))) | |
dda83cd7 | 2397 | sign = ~0; |
d2e4a39e AS |
2398 | |
2399 | unusedLS = | |
dda83cd7 SM |
2400 | (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT) |
2401 | % HOST_CHAR_BIT; | |
14f9c5c9 | 2402 | |
f93fca70 JB |
2403 | if (is_scalar) |
2404 | { | |
dda83cd7 SM |
2405 | accumSize = 0; |
2406 | unpacked_idx = unpacked_len - 1; | |
f93fca70 JB |
2407 | } |
2408 | else | |
2409 | { | |
dda83cd7 SM |
2410 | /* Non-scalar values must be aligned at a byte boundary... */ |
2411 | accumSize = | |
2412 | (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT; | |
2413 | /* ... And are placed at the beginning (most-significant) bytes | |
2414 | of the target. */ | |
2415 | unpacked_idx = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1; | |
2416 | unpacked_bytes_left = unpacked_idx + 1; | |
f93fca70 | 2417 | } |
14f9c5c9 | 2418 | } |
d2e4a39e | 2419 | else |
14f9c5c9 AS |
2420 | { |
2421 | int sign_bit_offset = (bit_size + bit_offset - 1) % 8; | |
2422 | ||
086ca51f | 2423 | src_idx = unpacked_idx = 0; |
14f9c5c9 AS |
2424 | unusedLS = bit_offset; |
2425 | accumSize = 0; | |
2426 | ||
f93fca70 | 2427 | if (is_signed_type && (src[src_len - 1] & (1 << sign_bit_offset))) |
dda83cd7 | 2428 | sign = ~0; |
14f9c5c9 | 2429 | } |
d2e4a39e | 2430 | |
14f9c5c9 | 2431 | accum = 0; |
086ca51f | 2432 | while (src_bytes_left > 0) |
14f9c5c9 AS |
2433 | { |
2434 | /* Mask for removing bits of the next source byte that are not | |
dda83cd7 | 2435 | part of the value. */ |
d2e4a39e | 2436 | unsigned int unusedMSMask = |
dda83cd7 SM |
2437 | (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) - |
2438 | 1; | |
4c4b4cd2 | 2439 | /* Sign-extend bits for this byte. */ |
14f9c5c9 | 2440 | unsigned int signMask = sign & ~unusedMSMask; |
5b4ee69b | 2441 | |
d2e4a39e | 2442 | accum |= |
dda83cd7 | 2443 | (((src[src_idx] >> unusedLS) & unusedMSMask) | signMask) << accumSize; |
14f9c5c9 | 2444 | accumSize += HOST_CHAR_BIT - unusedLS; |
d2e4a39e | 2445 | if (accumSize >= HOST_CHAR_BIT) |
dda83cd7 SM |
2446 | { |
2447 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); | |
2448 | accumSize -= HOST_CHAR_BIT; | |
2449 | accum >>= HOST_CHAR_BIT; | |
2450 | unpacked_bytes_left -= 1; | |
2451 | unpacked_idx += delta; | |
2452 | } | |
14f9c5c9 AS |
2453 | srcBitsLeft -= HOST_CHAR_BIT - unusedLS; |
2454 | unusedLS = 0; | |
086ca51f JB |
2455 | src_bytes_left -= 1; |
2456 | src_idx += delta; | |
14f9c5c9 | 2457 | } |
086ca51f | 2458 | while (unpacked_bytes_left > 0) |
14f9c5c9 AS |
2459 | { |
2460 | accum |= sign << accumSize; | |
db297a65 | 2461 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); |
14f9c5c9 | 2462 | accumSize -= HOST_CHAR_BIT; |
9cd4d857 JB |
2463 | if (accumSize < 0) |
2464 | accumSize = 0; | |
14f9c5c9 | 2465 | accum >>= HOST_CHAR_BIT; |
086ca51f JB |
2466 | unpacked_bytes_left -= 1; |
2467 | unpacked_idx += delta; | |
14f9c5c9 | 2468 | } |
f93fca70 JB |
2469 | } |
2470 | ||
2471 | /* Create a new value of type TYPE from the contents of OBJ starting | |
2472 | at byte OFFSET, and bit offset BIT_OFFSET within that byte, | |
2473 | proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then | |
2474 | assigning through the result will set the field fetched from. | |
2475 | VALADDR is ignored unless OBJ is NULL, in which case, | |
2476 | VALADDR+OFFSET must address the start of storage containing the | |
2477 | packed value. The value returned in this case is never an lval. | |
2478 | Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */ | |
2479 | ||
2480 | struct value * | |
2481 | ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr, | |
2482 | long offset, int bit_offset, int bit_size, | |
dda83cd7 | 2483 | struct type *type) |
f93fca70 JB |
2484 | { |
2485 | struct value *v; | |
bfb1c796 | 2486 | const gdb_byte *src; /* First byte containing data to unpack */ |
f93fca70 | 2487 | gdb_byte *unpacked; |
220475ed | 2488 | const int is_scalar = is_scalar_type (type); |
d5a22e77 | 2489 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d5722aa2 | 2490 | gdb::byte_vector staging; |
f93fca70 JB |
2491 | |
2492 | type = ada_check_typedef (type); | |
2493 | ||
d0a9e810 | 2494 | if (obj == NULL) |
bfb1c796 | 2495 | src = valaddr + offset; |
d0a9e810 | 2496 | else |
bfb1c796 | 2497 | src = value_contents (obj) + offset; |
d0a9e810 JB |
2498 | |
2499 | if (is_dynamic_type (type)) | |
2500 | { | |
2501 | /* The length of TYPE might by dynamic, so we need to resolve | |
2502 | TYPE in order to know its actual size, which we then use | |
2503 | to create the contents buffer of the value we return. | |
2504 | The difficulty is that the data containing our object is | |
2505 | packed, and therefore maybe not at a byte boundary. So, what | |
2506 | we do, is unpack the data into a byte-aligned buffer, and then | |
2507 | use that buffer as our object's value for resolving the type. */ | |
d5722aa2 PA |
2508 | int staging_len = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
2509 | staging.resize (staging_len); | |
d0a9e810 JB |
2510 | |
2511 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
dda83cd7 | 2512 | staging.data (), staging.size (), |
d0a9e810 JB |
2513 | is_big_endian, has_negatives (type), |
2514 | is_scalar); | |
b249d2c2 | 2515 | type = resolve_dynamic_type (type, staging, 0); |
0cafa88c JB |
2516 | if (TYPE_LENGTH (type) < (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT) |
2517 | { | |
2518 | /* This happens when the length of the object is dynamic, | |
2519 | and is actually smaller than the space reserved for it. | |
2520 | For instance, in an array of variant records, the bit_size | |
2521 | we're given is the array stride, which is constant and | |
2522 | normally equal to the maximum size of its element. | |
2523 | But, in reality, each element only actually spans a portion | |
2524 | of that stride. */ | |
2525 | bit_size = TYPE_LENGTH (type) * HOST_CHAR_BIT; | |
2526 | } | |
d0a9e810 JB |
2527 | } |
2528 | ||
f93fca70 JB |
2529 | if (obj == NULL) |
2530 | { | |
2531 | v = allocate_value (type); | |
bfb1c796 | 2532 | src = valaddr + offset; |
f93fca70 JB |
2533 | } |
2534 | else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj)) | |
2535 | { | |
0cafa88c | 2536 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
bfb1c796 | 2537 | gdb_byte *buf; |
0cafa88c | 2538 | |
f93fca70 | 2539 | v = value_at (type, value_address (obj) + offset); |
bfb1c796 PA |
2540 | buf = (gdb_byte *) alloca (src_len); |
2541 | read_memory (value_address (v), buf, src_len); | |
2542 | src = buf; | |
f93fca70 JB |
2543 | } |
2544 | else | |
2545 | { | |
2546 | v = allocate_value (type); | |
bfb1c796 | 2547 | src = value_contents (obj) + offset; |
f93fca70 JB |
2548 | } |
2549 | ||
2550 | if (obj != NULL) | |
2551 | { | |
2552 | long new_offset = offset; | |
2553 | ||
2554 | set_value_component_location (v, obj); | |
2555 | set_value_bitpos (v, bit_offset + value_bitpos (obj)); | |
2556 | set_value_bitsize (v, bit_size); | |
2557 | if (value_bitpos (v) >= HOST_CHAR_BIT) | |
dda83cd7 | 2558 | { |
f93fca70 | 2559 | ++new_offset; |
dda83cd7 SM |
2560 | set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT); |
2561 | } | |
f93fca70 JB |
2562 | set_value_offset (v, new_offset); |
2563 | ||
2564 | /* Also set the parent value. This is needed when trying to | |
2565 | assign a new value (in inferior memory). */ | |
2566 | set_value_parent (v, obj); | |
2567 | } | |
2568 | else | |
2569 | set_value_bitsize (v, bit_size); | |
bfb1c796 | 2570 | unpacked = value_contents_writeable (v); |
f93fca70 JB |
2571 | |
2572 | if (bit_size == 0) | |
2573 | { | |
2574 | memset (unpacked, 0, TYPE_LENGTH (type)); | |
2575 | return v; | |
2576 | } | |
2577 | ||
d5722aa2 | 2578 | if (staging.size () == TYPE_LENGTH (type)) |
f93fca70 | 2579 | { |
d0a9e810 JB |
2580 | /* Small short-cut: If we've unpacked the data into a buffer |
2581 | of the same size as TYPE's length, then we can reuse that, | |
2582 | instead of doing the unpacking again. */ | |
d5722aa2 | 2583 | memcpy (unpacked, staging.data (), staging.size ()); |
f93fca70 | 2584 | } |
d0a9e810 JB |
2585 | else |
2586 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
2587 | unpacked, TYPE_LENGTH (type), | |
2588 | is_big_endian, has_negatives (type), is_scalar); | |
f93fca70 | 2589 | |
14f9c5c9 AS |
2590 | return v; |
2591 | } | |
d2e4a39e | 2592 | |
14f9c5c9 AS |
2593 | /* Store the contents of FROMVAL into the location of TOVAL. |
2594 | Return a new value with the location of TOVAL and contents of | |
2595 | FROMVAL. Handles assignment into packed fields that have | |
4c4b4cd2 | 2596 | floating-point or non-scalar types. */ |
14f9c5c9 | 2597 | |
d2e4a39e AS |
2598 | static struct value * |
2599 | ada_value_assign (struct value *toval, struct value *fromval) | |
14f9c5c9 | 2600 | { |
df407dfe AC |
2601 | struct type *type = value_type (toval); |
2602 | int bits = value_bitsize (toval); | |
14f9c5c9 | 2603 | |
52ce6436 PH |
2604 | toval = ada_coerce_ref (toval); |
2605 | fromval = ada_coerce_ref (fromval); | |
2606 | ||
2607 | if (ada_is_direct_array_type (value_type (toval))) | |
2608 | toval = ada_coerce_to_simple_array (toval); | |
2609 | if (ada_is_direct_array_type (value_type (fromval))) | |
2610 | fromval = ada_coerce_to_simple_array (fromval); | |
2611 | ||
88e3b34b | 2612 | if (!deprecated_value_modifiable (toval)) |
323e0a4a | 2613 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
14f9c5c9 | 2614 | |
d2e4a39e | 2615 | if (VALUE_LVAL (toval) == lval_memory |
14f9c5c9 | 2616 | && bits > 0 |
78134374 | 2617 | && (type->code () == TYPE_CODE_FLT |
dda83cd7 | 2618 | || type->code () == TYPE_CODE_STRUCT)) |
14f9c5c9 | 2619 | { |
df407dfe AC |
2620 | int len = (value_bitpos (toval) |
2621 | + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; | |
aced2898 | 2622 | int from_size; |
224c3ddb | 2623 | gdb_byte *buffer = (gdb_byte *) alloca (len); |
d2e4a39e | 2624 | struct value *val; |
42ae5230 | 2625 | CORE_ADDR to_addr = value_address (toval); |
14f9c5c9 | 2626 | |
78134374 | 2627 | if (type->code () == TYPE_CODE_FLT) |
dda83cd7 | 2628 | fromval = value_cast (type, fromval); |
14f9c5c9 | 2629 | |
52ce6436 | 2630 | read_memory (to_addr, buffer, len); |
aced2898 PH |
2631 | from_size = value_bitsize (fromval); |
2632 | if (from_size == 0) | |
2633 | from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT; | |
d48e62f4 | 2634 | |
d5a22e77 | 2635 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d48e62f4 TT |
2636 | ULONGEST from_offset = 0; |
2637 | if (is_big_endian && is_scalar_type (value_type (fromval))) | |
2638 | from_offset = from_size - bits; | |
2639 | copy_bitwise (buffer, value_bitpos (toval), | |
2640 | value_contents (fromval), from_offset, | |
2641 | bits, is_big_endian); | |
972daa01 | 2642 | write_memory_with_notification (to_addr, buffer, len); |
8cebebb9 | 2643 | |
14f9c5c9 | 2644 | val = value_copy (toval); |
0fd88904 | 2645 | memcpy (value_contents_raw (val), value_contents (fromval), |
dda83cd7 | 2646 | TYPE_LENGTH (type)); |
04624583 | 2647 | deprecated_set_value_type (val, type); |
d2e4a39e | 2648 | |
14f9c5c9 AS |
2649 | return val; |
2650 | } | |
2651 | ||
2652 | return value_assign (toval, fromval); | |
2653 | } | |
2654 | ||
2655 | ||
7c512744 JB |
2656 | /* Given that COMPONENT is a memory lvalue that is part of the lvalue |
2657 | CONTAINER, assign the contents of VAL to COMPONENTS's place in | |
2658 | CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not | |
2659 | COMPONENT, and not the inferior's memory. The current contents | |
2660 | of COMPONENT are ignored. | |
2661 | ||
2662 | Although not part of the initial design, this function also works | |
2663 | when CONTAINER and COMPONENT are not_lval's: it works as if CONTAINER | |
2664 | had a null address, and COMPONENT had an address which is equal to | |
2665 | its offset inside CONTAINER. */ | |
2666 | ||
52ce6436 PH |
2667 | static void |
2668 | value_assign_to_component (struct value *container, struct value *component, | |
2669 | struct value *val) | |
2670 | { | |
2671 | LONGEST offset_in_container = | |
42ae5230 | 2672 | (LONGEST) (value_address (component) - value_address (container)); |
7c512744 | 2673 | int bit_offset_in_container = |
52ce6436 PH |
2674 | value_bitpos (component) - value_bitpos (container); |
2675 | int bits; | |
7c512744 | 2676 | |
52ce6436 PH |
2677 | val = value_cast (value_type (component), val); |
2678 | ||
2679 | if (value_bitsize (component) == 0) | |
2680 | bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component)); | |
2681 | else | |
2682 | bits = value_bitsize (component); | |
2683 | ||
d5a22e77 | 2684 | if (type_byte_order (value_type (container)) == BFD_ENDIAN_BIG) |
2a62dfa9 JB |
2685 | { |
2686 | int src_offset; | |
2687 | ||
2688 | if (is_scalar_type (check_typedef (value_type (component)))) | |
dda83cd7 | 2689 | src_offset |
2a62dfa9 JB |
2690 | = TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits; |
2691 | else | |
2692 | src_offset = 0; | |
a99bc3d2 JB |
2693 | copy_bitwise (value_contents_writeable (container) + offset_in_container, |
2694 | value_bitpos (container) + bit_offset_in_container, | |
2695 | value_contents (val), src_offset, bits, 1); | |
2a62dfa9 | 2696 | } |
52ce6436 | 2697 | else |
a99bc3d2 JB |
2698 | copy_bitwise (value_contents_writeable (container) + offset_in_container, |
2699 | value_bitpos (container) + bit_offset_in_container, | |
2700 | value_contents (val), 0, bits, 0); | |
7c512744 JB |
2701 | } |
2702 | ||
736ade86 XR |
2703 | /* Determine if TYPE is an access to an unconstrained array. */ |
2704 | ||
d91e9ea8 | 2705 | bool |
736ade86 XR |
2706 | ada_is_access_to_unconstrained_array (struct type *type) |
2707 | { | |
78134374 | 2708 | return (type->code () == TYPE_CODE_TYPEDEF |
736ade86 XR |
2709 | && is_thick_pntr (ada_typedef_target_type (type))); |
2710 | } | |
2711 | ||
4c4b4cd2 PH |
2712 | /* The value of the element of array ARR at the ARITY indices given in IND. |
2713 | ARR may be either a simple array, GNAT array descriptor, or pointer | |
14f9c5c9 AS |
2714 | thereto. */ |
2715 | ||
d2e4a39e AS |
2716 | struct value * |
2717 | ada_value_subscript (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
2718 | { |
2719 | int k; | |
d2e4a39e AS |
2720 | struct value *elt; |
2721 | struct type *elt_type; | |
14f9c5c9 AS |
2722 | |
2723 | elt = ada_coerce_to_simple_array (arr); | |
2724 | ||
df407dfe | 2725 | elt_type = ada_check_typedef (value_type (elt)); |
78134374 | 2726 | if (elt_type->code () == TYPE_CODE_ARRAY |
14f9c5c9 AS |
2727 | && TYPE_FIELD_BITSIZE (elt_type, 0) > 0) |
2728 | return value_subscript_packed (elt, arity, ind); | |
2729 | ||
2730 | for (k = 0; k < arity; k += 1) | |
2731 | { | |
b9c50e9a XR |
2732 | struct type *saved_elt_type = TYPE_TARGET_TYPE (elt_type); |
2733 | ||
78134374 | 2734 | if (elt_type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 2735 | error (_("too many subscripts (%d expected)"), k); |
b9c50e9a | 2736 | |
2497b498 | 2737 | elt = value_subscript (elt, pos_atr (ind[k])); |
b9c50e9a XR |
2738 | |
2739 | if (ada_is_access_to_unconstrained_array (saved_elt_type) | |
78134374 | 2740 | && value_type (elt)->code () != TYPE_CODE_TYPEDEF) |
b9c50e9a XR |
2741 | { |
2742 | /* The element is a typedef to an unconstrained array, | |
2743 | except that the value_subscript call stripped the | |
2744 | typedef layer. The typedef layer is GNAT's way to | |
2745 | specify that the element is, at the source level, an | |
2746 | access to the unconstrained array, rather than the | |
2747 | unconstrained array. So, we need to restore that | |
2748 | typedef layer, which we can do by forcing the element's | |
2749 | type back to its original type. Otherwise, the returned | |
2750 | value is going to be printed as the array, rather | |
2751 | than as an access. Another symptom of the same issue | |
2752 | would be that an expression trying to dereference the | |
2753 | element would also be improperly rejected. */ | |
2754 | deprecated_set_value_type (elt, saved_elt_type); | |
2755 | } | |
2756 | ||
2757 | elt_type = ada_check_typedef (value_type (elt)); | |
14f9c5c9 | 2758 | } |
b9c50e9a | 2759 | |
14f9c5c9 AS |
2760 | return elt; |
2761 | } | |
2762 | ||
deede10c JB |
2763 | /* Assuming ARR is a pointer to a GDB array, the value of the element |
2764 | of *ARR at the ARITY indices given in IND. | |
919e6dbe PMR |
2765 | Does not read the entire array into memory. |
2766 | ||
2767 | Note: Unlike what one would expect, this function is used instead of | |
2768 | ada_value_subscript for basically all non-packed array types. The reason | |
2769 | for this is that a side effect of doing our own pointer arithmetics instead | |
2770 | of relying on value_subscript is that there is no implicit typedef peeling. | |
2771 | This is important for arrays of array accesses, where it allows us to | |
2772 | preserve the fact that the array's element is an array access, where the | |
2773 | access part os encoded in a typedef layer. */ | |
14f9c5c9 | 2774 | |
2c0b251b | 2775 | static struct value * |
deede10c | 2776 | ada_value_ptr_subscript (struct value *arr, int arity, struct value **ind) |
14f9c5c9 AS |
2777 | { |
2778 | int k; | |
919e6dbe | 2779 | struct value *array_ind = ada_value_ind (arr); |
deede10c | 2780 | struct type *type |
919e6dbe PMR |
2781 | = check_typedef (value_enclosing_type (array_ind)); |
2782 | ||
78134374 | 2783 | if (type->code () == TYPE_CODE_ARRAY |
919e6dbe PMR |
2784 | && TYPE_FIELD_BITSIZE (type, 0) > 0) |
2785 | return value_subscript_packed (array_ind, arity, ind); | |
14f9c5c9 AS |
2786 | |
2787 | for (k = 0; k < arity; k += 1) | |
2788 | { | |
2789 | LONGEST lwb, upb; | |
14f9c5c9 | 2790 | |
78134374 | 2791 | if (type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 2792 | error (_("too many subscripts (%d expected)"), k); |
d2e4a39e | 2793 | arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
dda83cd7 | 2794 | value_copy (arr)); |
3d967001 | 2795 | get_discrete_bounds (type->index_type (), &lwb, &upb); |
53a47a3e | 2796 | arr = value_ptradd (arr, pos_atr (ind[k]) - lwb); |
14f9c5c9 AS |
2797 | type = TYPE_TARGET_TYPE (type); |
2798 | } | |
2799 | ||
2800 | return value_ind (arr); | |
2801 | } | |
2802 | ||
0b5d8877 | 2803 | /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the |
aa715135 JG |
2804 | actual type of ARRAY_PTR is ignored), returns the Ada slice of |
2805 | HIGH'Pos-LOW'Pos+1 elements starting at index LOW. The lower bound of | |
2806 | this array is LOW, as per Ada rules. */ | |
0b5d8877 | 2807 | static struct value * |
f5938064 | 2808 | ada_value_slice_from_ptr (struct value *array_ptr, struct type *type, |
dda83cd7 | 2809 | int low, int high) |
0b5d8877 | 2810 | { |
b0dd7688 | 2811 | struct type *type0 = ada_check_typedef (type); |
3d967001 | 2812 | struct type *base_index_type = TYPE_TARGET_TYPE (type0->index_type ()); |
0c9c3474 | 2813 | struct type *index_type |
aa715135 | 2814 | = create_static_range_type (NULL, base_index_type, low, high); |
9fe561ab JB |
2815 | struct type *slice_type = create_array_type_with_stride |
2816 | (NULL, TYPE_TARGET_TYPE (type0), index_type, | |
24e99c6c | 2817 | type0->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 2818 | TYPE_FIELD_BITSIZE (type0, 0)); |
3d967001 | 2819 | int base_low = ada_discrete_type_low_bound (type0->index_type ()); |
6244c119 | 2820 | gdb::optional<LONGEST> base_low_pos, low_pos; |
aa715135 JG |
2821 | CORE_ADDR base; |
2822 | ||
6244c119 SM |
2823 | low_pos = discrete_position (base_index_type, low); |
2824 | base_low_pos = discrete_position (base_index_type, base_low); | |
2825 | ||
2826 | if (!low_pos.has_value () || !base_low_pos.has_value ()) | |
aa715135 JG |
2827 | { |
2828 | warning (_("unable to get positions in slice, use bounds instead")); | |
2829 | low_pos = low; | |
2830 | base_low_pos = base_low; | |
2831 | } | |
5b4ee69b | 2832 | |
7ff5b937 TT |
2833 | ULONGEST stride = TYPE_FIELD_BITSIZE (slice_type, 0) / 8; |
2834 | if (stride == 0) | |
2835 | stride = TYPE_LENGTH (TYPE_TARGET_TYPE (type0)); | |
2836 | ||
6244c119 | 2837 | base = value_as_address (array_ptr) + (*low_pos - *base_low_pos) * stride; |
f5938064 | 2838 | return value_at_lazy (slice_type, base); |
0b5d8877 PH |
2839 | } |
2840 | ||
2841 | ||
2842 | static struct value * | |
2843 | ada_value_slice (struct value *array, int low, int high) | |
2844 | { | |
b0dd7688 | 2845 | struct type *type = ada_check_typedef (value_type (array)); |
3d967001 | 2846 | struct type *base_index_type = TYPE_TARGET_TYPE (type->index_type ()); |
0c9c3474 | 2847 | struct type *index_type |
3d967001 | 2848 | = create_static_range_type (NULL, type->index_type (), low, high); |
9fe561ab JB |
2849 | struct type *slice_type = create_array_type_with_stride |
2850 | (NULL, TYPE_TARGET_TYPE (type), index_type, | |
24e99c6c | 2851 | type->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 2852 | TYPE_FIELD_BITSIZE (type, 0)); |
6244c119 SM |
2853 | gdb::optional<LONGEST> low_pos, high_pos; |
2854 | ||
5b4ee69b | 2855 | |
6244c119 SM |
2856 | low_pos = discrete_position (base_index_type, low); |
2857 | high_pos = discrete_position (base_index_type, high); | |
2858 | ||
2859 | if (!low_pos.has_value () || !high_pos.has_value ()) | |
aa715135 JG |
2860 | { |
2861 | warning (_("unable to get positions in slice, use bounds instead")); | |
2862 | low_pos = low; | |
2863 | high_pos = high; | |
2864 | } | |
2865 | ||
2866 | return value_cast (slice_type, | |
6244c119 | 2867 | value_slice (array, low, *high_pos - *low_pos + 1)); |
0b5d8877 PH |
2868 | } |
2869 | ||
14f9c5c9 AS |
2870 | /* If type is a record type in the form of a standard GNAT array |
2871 | descriptor, returns the number of dimensions for type. If arr is a | |
2872 | simple array, returns the number of "array of"s that prefix its | |
4c4b4cd2 | 2873 | type designation. Otherwise, returns 0. */ |
14f9c5c9 AS |
2874 | |
2875 | int | |
d2e4a39e | 2876 | ada_array_arity (struct type *type) |
14f9c5c9 AS |
2877 | { |
2878 | int arity; | |
2879 | ||
2880 | if (type == NULL) | |
2881 | return 0; | |
2882 | ||
2883 | type = desc_base_type (type); | |
2884 | ||
2885 | arity = 0; | |
78134374 | 2886 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 | 2887 | return desc_arity (desc_bounds_type (type)); |
d2e4a39e | 2888 | else |
78134374 | 2889 | while (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 2890 | { |
dda83cd7 SM |
2891 | arity += 1; |
2892 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
14f9c5c9 | 2893 | } |
d2e4a39e | 2894 | |
14f9c5c9 AS |
2895 | return arity; |
2896 | } | |
2897 | ||
2898 | /* If TYPE is a record type in the form of a standard GNAT array | |
2899 | descriptor or a simple array type, returns the element type for | |
2900 | TYPE after indexing by NINDICES indices, or by all indices if | |
4c4b4cd2 | 2901 | NINDICES is -1. Otherwise, returns NULL. */ |
14f9c5c9 | 2902 | |
d2e4a39e AS |
2903 | struct type * |
2904 | ada_array_element_type (struct type *type, int nindices) | |
14f9c5c9 AS |
2905 | { |
2906 | type = desc_base_type (type); | |
2907 | ||
78134374 | 2908 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
2909 | { |
2910 | int k; | |
d2e4a39e | 2911 | struct type *p_array_type; |
14f9c5c9 | 2912 | |
556bdfd4 | 2913 | p_array_type = desc_data_target_type (type); |
14f9c5c9 AS |
2914 | |
2915 | k = ada_array_arity (type); | |
2916 | if (k == 0) | |
dda83cd7 | 2917 | return NULL; |
d2e4a39e | 2918 | |
4c4b4cd2 | 2919 | /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */ |
14f9c5c9 | 2920 | if (nindices >= 0 && k > nindices) |
dda83cd7 | 2921 | k = nindices; |
d2e4a39e | 2922 | while (k > 0 && p_array_type != NULL) |
dda83cd7 SM |
2923 | { |
2924 | p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type)); | |
2925 | k -= 1; | |
2926 | } | |
14f9c5c9 AS |
2927 | return p_array_type; |
2928 | } | |
78134374 | 2929 | else if (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 2930 | { |
78134374 | 2931 | while (nindices != 0 && type->code () == TYPE_CODE_ARRAY) |
dda83cd7 SM |
2932 | { |
2933 | type = TYPE_TARGET_TYPE (type); | |
2934 | nindices -= 1; | |
2935 | } | |
14f9c5c9 AS |
2936 | return type; |
2937 | } | |
2938 | ||
2939 | return NULL; | |
2940 | } | |
2941 | ||
4c4b4cd2 | 2942 | /* The type of nth index in arrays of given type (n numbering from 1). |
dd19d49e UW |
2943 | Does not examine memory. Throws an error if N is invalid or TYPE |
2944 | is not an array type. NAME is the name of the Ada attribute being | |
2945 | evaluated ('range, 'first, 'last, or 'length); it is used in building | |
2946 | the error message. */ | |
14f9c5c9 | 2947 | |
1eea4ebd UW |
2948 | static struct type * |
2949 | ada_index_type (struct type *type, int n, const char *name) | |
14f9c5c9 | 2950 | { |
4c4b4cd2 PH |
2951 | struct type *result_type; |
2952 | ||
14f9c5c9 AS |
2953 | type = desc_base_type (type); |
2954 | ||
1eea4ebd UW |
2955 | if (n < 0 || n > ada_array_arity (type)) |
2956 | error (_("invalid dimension number to '%s"), name); | |
14f9c5c9 | 2957 | |
4c4b4cd2 | 2958 | if (ada_is_simple_array_type (type)) |
14f9c5c9 AS |
2959 | { |
2960 | int i; | |
2961 | ||
2962 | for (i = 1; i < n; i += 1) | |
dda83cd7 | 2963 | type = TYPE_TARGET_TYPE (type); |
3d967001 | 2964 | result_type = TYPE_TARGET_TYPE (type->index_type ()); |
4c4b4cd2 | 2965 | /* FIXME: The stabs type r(0,0);bound;bound in an array type |
dda83cd7 SM |
2966 | has a target type of TYPE_CODE_UNDEF. We compensate here, but |
2967 | perhaps stabsread.c would make more sense. */ | |
78134374 | 2968 | if (result_type && result_type->code () == TYPE_CODE_UNDEF) |
dda83cd7 | 2969 | result_type = NULL; |
14f9c5c9 | 2970 | } |
d2e4a39e | 2971 | else |
1eea4ebd UW |
2972 | { |
2973 | result_type = desc_index_type (desc_bounds_type (type), n); | |
2974 | if (result_type == NULL) | |
2975 | error (_("attempt to take bound of something that is not an array")); | |
2976 | } | |
2977 | ||
2978 | return result_type; | |
14f9c5c9 AS |
2979 | } |
2980 | ||
2981 | /* Given that arr is an array type, returns the lower bound of the | |
2982 | Nth index (numbering from 1) if WHICH is 0, and the upper bound if | |
4c4b4cd2 | 2983 | WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an |
1eea4ebd UW |
2984 | array-descriptor type. It works for other arrays with bounds supplied |
2985 | by run-time quantities other than discriminants. */ | |
14f9c5c9 | 2986 | |
abb68b3e | 2987 | static LONGEST |
fb5e3d5c | 2988 | ada_array_bound_from_type (struct type *arr_type, int n, int which) |
14f9c5c9 | 2989 | { |
8a48ac95 | 2990 | struct type *type, *index_type_desc, *index_type; |
1ce677a4 | 2991 | int i; |
262452ec JK |
2992 | |
2993 | gdb_assert (which == 0 || which == 1); | |
14f9c5c9 | 2994 | |
ad82864c JB |
2995 | if (ada_is_constrained_packed_array_type (arr_type)) |
2996 | arr_type = decode_constrained_packed_array_type (arr_type); | |
14f9c5c9 | 2997 | |
4c4b4cd2 | 2998 | if (arr_type == NULL || !ada_is_simple_array_type (arr_type)) |
1eea4ebd | 2999 | return (LONGEST) - which; |
14f9c5c9 | 3000 | |
78134374 | 3001 | if (arr_type->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
3002 | type = TYPE_TARGET_TYPE (arr_type); |
3003 | else | |
3004 | type = arr_type; | |
3005 | ||
22c4c60c | 3006 | if (type->is_fixed_instance ()) |
bafffb51 JB |
3007 | { |
3008 | /* The array has already been fixed, so we do not need to | |
3009 | check the parallel ___XA type again. That encoding has | |
3010 | already been applied, so ignore it now. */ | |
3011 | index_type_desc = NULL; | |
3012 | } | |
3013 | else | |
3014 | { | |
3015 | index_type_desc = ada_find_parallel_type (type, "___XA"); | |
3016 | ada_fixup_array_indexes_type (index_type_desc); | |
3017 | } | |
3018 | ||
262452ec | 3019 | if (index_type_desc != NULL) |
940da03e | 3020 | index_type = to_fixed_range_type (index_type_desc->field (n - 1).type (), |
28c85d6c | 3021 | NULL); |
262452ec | 3022 | else |
8a48ac95 JB |
3023 | { |
3024 | struct type *elt_type = check_typedef (type); | |
3025 | ||
3026 | for (i = 1; i < n; i++) | |
3027 | elt_type = check_typedef (TYPE_TARGET_TYPE (elt_type)); | |
3028 | ||
3d967001 | 3029 | index_type = elt_type->index_type (); |
8a48ac95 | 3030 | } |
262452ec | 3031 | |
43bbcdc2 PH |
3032 | return |
3033 | (LONGEST) (which == 0 | |
dda83cd7 SM |
3034 | ? ada_discrete_type_low_bound (index_type) |
3035 | : ada_discrete_type_high_bound (index_type)); | |
14f9c5c9 AS |
3036 | } |
3037 | ||
3038 | /* Given that arr is an array value, returns the lower bound of the | |
abb68b3e JB |
3039 | nth index (numbering from 1) if WHICH is 0, and the upper bound if |
3040 | WHICH is 1. This routine will also work for arrays with bounds | |
4c4b4cd2 | 3041 | supplied by run-time quantities other than discriminants. */ |
14f9c5c9 | 3042 | |
1eea4ebd | 3043 | static LONGEST |
4dc81987 | 3044 | ada_array_bound (struct value *arr, int n, int which) |
14f9c5c9 | 3045 | { |
eb479039 JB |
3046 | struct type *arr_type; |
3047 | ||
78134374 | 3048 | if (check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
eb479039 JB |
3049 | arr = value_ind (arr); |
3050 | arr_type = value_enclosing_type (arr); | |
14f9c5c9 | 3051 | |
ad82864c JB |
3052 | if (ada_is_constrained_packed_array_type (arr_type)) |
3053 | return ada_array_bound (decode_constrained_packed_array (arr), n, which); | |
4c4b4cd2 | 3054 | else if (ada_is_simple_array_type (arr_type)) |
1eea4ebd | 3055 | return ada_array_bound_from_type (arr_type, n, which); |
14f9c5c9 | 3056 | else |
1eea4ebd | 3057 | return value_as_long (desc_one_bound (desc_bounds (arr), n, which)); |
14f9c5c9 AS |
3058 | } |
3059 | ||
3060 | /* Given that arr is an array value, returns the length of the | |
3061 | nth index. This routine will also work for arrays with bounds | |
4c4b4cd2 PH |
3062 | supplied by run-time quantities other than discriminants. |
3063 | Does not work for arrays indexed by enumeration types with representation | |
3064 | clauses at the moment. */ | |
14f9c5c9 | 3065 | |
1eea4ebd | 3066 | static LONGEST |
d2e4a39e | 3067 | ada_array_length (struct value *arr, int n) |
14f9c5c9 | 3068 | { |
aa715135 JG |
3069 | struct type *arr_type, *index_type; |
3070 | int low, high; | |
eb479039 | 3071 | |
78134374 | 3072 | if (check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
eb479039 JB |
3073 | arr = value_ind (arr); |
3074 | arr_type = value_enclosing_type (arr); | |
14f9c5c9 | 3075 | |
ad82864c JB |
3076 | if (ada_is_constrained_packed_array_type (arr_type)) |
3077 | return ada_array_length (decode_constrained_packed_array (arr), n); | |
14f9c5c9 | 3078 | |
4c4b4cd2 | 3079 | if (ada_is_simple_array_type (arr_type)) |
aa715135 JG |
3080 | { |
3081 | low = ada_array_bound_from_type (arr_type, n, 0); | |
3082 | high = ada_array_bound_from_type (arr_type, n, 1); | |
3083 | } | |
14f9c5c9 | 3084 | else |
aa715135 JG |
3085 | { |
3086 | low = value_as_long (desc_one_bound (desc_bounds (arr), n, 0)); | |
3087 | high = value_as_long (desc_one_bound (desc_bounds (arr), n, 1)); | |
3088 | } | |
3089 | ||
f168693b | 3090 | arr_type = check_typedef (arr_type); |
7150d33c | 3091 | index_type = ada_index_type (arr_type, n, "length"); |
aa715135 JG |
3092 | if (index_type != NULL) |
3093 | { | |
3094 | struct type *base_type; | |
78134374 | 3095 | if (index_type->code () == TYPE_CODE_RANGE) |
aa715135 JG |
3096 | base_type = TYPE_TARGET_TYPE (index_type); |
3097 | else | |
3098 | base_type = index_type; | |
3099 | ||
3100 | low = pos_atr (value_from_longest (base_type, low)); | |
3101 | high = pos_atr (value_from_longest (base_type, high)); | |
3102 | } | |
3103 | return high - low + 1; | |
4c4b4cd2 PH |
3104 | } |
3105 | ||
bff8c71f TT |
3106 | /* An array whose type is that of ARR_TYPE (an array type), with |
3107 | bounds LOW to HIGH, but whose contents are unimportant. If HIGH is | |
3108 | less than LOW, then LOW-1 is used. */ | |
4c4b4cd2 PH |
3109 | |
3110 | static struct value * | |
bff8c71f | 3111 | empty_array (struct type *arr_type, int low, int high) |
4c4b4cd2 | 3112 | { |
b0dd7688 | 3113 | struct type *arr_type0 = ada_check_typedef (arr_type); |
0c9c3474 SA |
3114 | struct type *index_type |
3115 | = create_static_range_type | |
dda83cd7 | 3116 | (NULL, TYPE_TARGET_TYPE (arr_type0->index_type ()), low, |
bff8c71f | 3117 | high < low ? low - 1 : high); |
b0dd7688 | 3118 | struct type *elt_type = ada_array_element_type (arr_type0, 1); |
5b4ee69b | 3119 | |
0b5d8877 | 3120 | return allocate_value (create_array_type (NULL, elt_type, index_type)); |
14f9c5c9 | 3121 | } |
14f9c5c9 | 3122 | \f |
d2e4a39e | 3123 | |
dda83cd7 | 3124 | /* Name resolution */ |
14f9c5c9 | 3125 | |
4c4b4cd2 PH |
3126 | /* The "decoded" name for the user-definable Ada operator corresponding |
3127 | to OP. */ | |
14f9c5c9 | 3128 | |
d2e4a39e | 3129 | static const char * |
4c4b4cd2 | 3130 | ada_decoded_op_name (enum exp_opcode op) |
14f9c5c9 AS |
3131 | { |
3132 | int i; | |
3133 | ||
4c4b4cd2 | 3134 | for (i = 0; ada_opname_table[i].encoded != NULL; i += 1) |
14f9c5c9 AS |
3135 | { |
3136 | if (ada_opname_table[i].op == op) | |
dda83cd7 | 3137 | return ada_opname_table[i].decoded; |
14f9c5c9 | 3138 | } |
323e0a4a | 3139 | error (_("Could not find operator name for opcode")); |
14f9c5c9 AS |
3140 | } |
3141 | ||
de93309a SM |
3142 | /* Returns true (non-zero) iff decoded name N0 should appear before N1 |
3143 | in a listing of choices during disambiguation (see sort_choices, below). | |
3144 | The idea is that overloadings of a subprogram name from the | |
3145 | same package should sort in their source order. We settle for ordering | |
3146 | such symbols by their trailing number (__N or $N). */ | |
14f9c5c9 | 3147 | |
de93309a SM |
3148 | static int |
3149 | encoded_ordered_before (const char *N0, const char *N1) | |
14f9c5c9 | 3150 | { |
de93309a SM |
3151 | if (N1 == NULL) |
3152 | return 0; | |
3153 | else if (N0 == NULL) | |
3154 | return 1; | |
3155 | else | |
3156 | { | |
3157 | int k0, k1; | |
30b15541 | 3158 | |
de93309a | 3159 | for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1) |
dda83cd7 | 3160 | ; |
de93309a | 3161 | for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1) |
dda83cd7 | 3162 | ; |
de93309a | 3163 | if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000' |
dda83cd7 SM |
3164 | && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000') |
3165 | { | |
3166 | int n0, n1; | |
3167 | ||
3168 | n0 = k0; | |
3169 | while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_') | |
3170 | n0 -= 1; | |
3171 | n1 = k1; | |
3172 | while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_') | |
3173 | n1 -= 1; | |
3174 | if (n0 == n1 && strncmp (N0, N1, n0) == 0) | |
3175 | return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1)); | |
3176 | } | |
de93309a SM |
3177 | return (strcmp (N0, N1) < 0); |
3178 | } | |
14f9c5c9 AS |
3179 | } |
3180 | ||
de93309a SM |
3181 | /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the |
3182 | encoded names. */ | |
14f9c5c9 | 3183 | |
de93309a SM |
3184 | static void |
3185 | sort_choices (struct block_symbol syms[], int nsyms) | |
14f9c5c9 | 3186 | { |
14f9c5c9 | 3187 | int i; |
14f9c5c9 | 3188 | |
de93309a | 3189 | for (i = 1; i < nsyms; i += 1) |
14f9c5c9 | 3190 | { |
de93309a SM |
3191 | struct block_symbol sym = syms[i]; |
3192 | int j; | |
3193 | ||
3194 | for (j = i - 1; j >= 0; j -= 1) | |
dda83cd7 SM |
3195 | { |
3196 | if (encoded_ordered_before (syms[j].symbol->linkage_name (), | |
3197 | sym.symbol->linkage_name ())) | |
3198 | break; | |
3199 | syms[j + 1] = syms[j]; | |
3200 | } | |
de93309a SM |
3201 | syms[j + 1] = sym; |
3202 | } | |
3203 | } | |
14f9c5c9 | 3204 | |
de93309a SM |
3205 | /* Whether GDB should display formals and return types for functions in the |
3206 | overloads selection menu. */ | |
3207 | static bool print_signatures = true; | |
4c4b4cd2 | 3208 | |
de93309a SM |
3209 | /* Print the signature for SYM on STREAM according to the FLAGS options. For |
3210 | all but functions, the signature is just the name of the symbol. For | |
3211 | functions, this is the name of the function, the list of types for formals | |
3212 | and the return type (if any). */ | |
4c4b4cd2 | 3213 | |
de93309a SM |
3214 | static void |
3215 | ada_print_symbol_signature (struct ui_file *stream, struct symbol *sym, | |
3216 | const struct type_print_options *flags) | |
3217 | { | |
3218 | struct type *type = SYMBOL_TYPE (sym); | |
14f9c5c9 | 3219 | |
987012b8 | 3220 | fprintf_filtered (stream, "%s", sym->print_name ()); |
de93309a SM |
3221 | if (!print_signatures |
3222 | || type == NULL | |
78134374 | 3223 | || type->code () != TYPE_CODE_FUNC) |
de93309a | 3224 | return; |
4c4b4cd2 | 3225 | |
1f704f76 | 3226 | if (type->num_fields () > 0) |
de93309a SM |
3227 | { |
3228 | int i; | |
14f9c5c9 | 3229 | |
de93309a | 3230 | fprintf_filtered (stream, " ("); |
1f704f76 | 3231 | for (i = 0; i < type->num_fields (); ++i) |
de93309a SM |
3232 | { |
3233 | if (i > 0) | |
3234 | fprintf_filtered (stream, "; "); | |
940da03e | 3235 | ada_print_type (type->field (i).type (), NULL, stream, -1, 0, |
de93309a SM |
3236 | flags); |
3237 | } | |
3238 | fprintf_filtered (stream, ")"); | |
3239 | } | |
3240 | if (TYPE_TARGET_TYPE (type) != NULL | |
78134374 | 3241 | && TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID) |
de93309a SM |
3242 | { |
3243 | fprintf_filtered (stream, " return "); | |
3244 | ada_print_type (TYPE_TARGET_TYPE (type), NULL, stream, -1, 0, flags); | |
3245 | } | |
3246 | } | |
14f9c5c9 | 3247 | |
de93309a SM |
3248 | /* Read and validate a set of numeric choices from the user in the |
3249 | range 0 .. N_CHOICES-1. Place the results in increasing | |
3250 | order in CHOICES[0 .. N-1], and return N. | |
14f9c5c9 | 3251 | |
de93309a SM |
3252 | The user types choices as a sequence of numbers on one line |
3253 | separated by blanks, encoding them as follows: | |
14f9c5c9 | 3254 | |
de93309a SM |
3255 | + A choice of 0 means to cancel the selection, throwing an error. |
3256 | + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1. | |
3257 | + The user chooses k by typing k+IS_ALL_CHOICE+1. | |
14f9c5c9 | 3258 | |
de93309a | 3259 | The user is not allowed to choose more than MAX_RESULTS values. |
14f9c5c9 | 3260 | |
de93309a SM |
3261 | ANNOTATION_SUFFIX, if present, is used to annotate the input |
3262 | prompts (for use with the -f switch). */ | |
14f9c5c9 | 3263 | |
de93309a SM |
3264 | static int |
3265 | get_selections (int *choices, int n_choices, int max_results, | |
dda83cd7 | 3266 | int is_all_choice, const char *annotation_suffix) |
de93309a | 3267 | { |
992a7040 | 3268 | const char *args; |
de93309a SM |
3269 | const char *prompt; |
3270 | int n_chosen; | |
3271 | int first_choice = is_all_choice ? 2 : 1; | |
14f9c5c9 | 3272 | |
de93309a SM |
3273 | prompt = getenv ("PS2"); |
3274 | if (prompt == NULL) | |
3275 | prompt = "> "; | |
4c4b4cd2 | 3276 | |
de93309a | 3277 | args = command_line_input (prompt, annotation_suffix); |
4c4b4cd2 | 3278 | |
de93309a SM |
3279 | if (args == NULL) |
3280 | error_no_arg (_("one or more choice numbers")); | |
14f9c5c9 | 3281 | |
de93309a | 3282 | n_chosen = 0; |
4c4b4cd2 | 3283 | |
de93309a SM |
3284 | /* Set choices[0 .. n_chosen-1] to the users' choices in ascending |
3285 | order, as given in args. Choices are validated. */ | |
3286 | while (1) | |
14f9c5c9 | 3287 | { |
de93309a SM |
3288 | char *args2; |
3289 | int choice, j; | |
76a01679 | 3290 | |
de93309a SM |
3291 | args = skip_spaces (args); |
3292 | if (*args == '\0' && n_chosen == 0) | |
dda83cd7 | 3293 | error_no_arg (_("one or more choice numbers")); |
de93309a | 3294 | else if (*args == '\0') |
dda83cd7 | 3295 | break; |
76a01679 | 3296 | |
de93309a SM |
3297 | choice = strtol (args, &args2, 10); |
3298 | if (args == args2 || choice < 0 | |
dda83cd7 SM |
3299 | || choice > n_choices + first_choice - 1) |
3300 | error (_("Argument must be choice number")); | |
de93309a | 3301 | args = args2; |
76a01679 | 3302 | |
de93309a | 3303 | if (choice == 0) |
dda83cd7 | 3304 | error (_("cancelled")); |
76a01679 | 3305 | |
de93309a | 3306 | if (choice < first_choice) |
dda83cd7 SM |
3307 | { |
3308 | n_chosen = n_choices; | |
3309 | for (j = 0; j < n_choices; j += 1) | |
3310 | choices[j] = j; | |
3311 | break; | |
3312 | } | |
de93309a | 3313 | choice -= first_choice; |
76a01679 | 3314 | |
de93309a | 3315 | for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1) |
dda83cd7 SM |
3316 | { |
3317 | } | |
4c4b4cd2 | 3318 | |
de93309a | 3319 | if (j < 0 || choice != choices[j]) |
dda83cd7 SM |
3320 | { |
3321 | int k; | |
4c4b4cd2 | 3322 | |
dda83cd7 SM |
3323 | for (k = n_chosen - 1; k > j; k -= 1) |
3324 | choices[k + 1] = choices[k]; | |
3325 | choices[j + 1] = choice; | |
3326 | n_chosen += 1; | |
3327 | } | |
14f9c5c9 AS |
3328 | } |
3329 | ||
de93309a SM |
3330 | if (n_chosen > max_results) |
3331 | error (_("Select no more than %d of the above"), max_results); | |
3332 | ||
3333 | return n_chosen; | |
14f9c5c9 AS |
3334 | } |
3335 | ||
de93309a SM |
3336 | /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0 |
3337 | by asking the user (if necessary), returning the number selected, | |
3338 | and setting the first elements of SYMS items. Error if no symbols | |
3339 | selected. */ | |
3340 | ||
3341 | /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought | |
3342 | to be re-integrated one of these days. */ | |
14f9c5c9 AS |
3343 | |
3344 | static int | |
de93309a | 3345 | user_select_syms (struct block_symbol *syms, int nsyms, int max_results) |
14f9c5c9 | 3346 | { |
de93309a SM |
3347 | int i; |
3348 | int *chosen = XALLOCAVEC (int , nsyms); | |
3349 | int n_chosen; | |
3350 | int first_choice = (max_results == 1) ? 1 : 2; | |
3351 | const char *select_mode = multiple_symbols_select_mode (); | |
14f9c5c9 | 3352 | |
de93309a SM |
3353 | if (max_results < 1) |
3354 | error (_("Request to select 0 symbols!")); | |
3355 | if (nsyms <= 1) | |
3356 | return nsyms; | |
14f9c5c9 | 3357 | |
de93309a SM |
3358 | if (select_mode == multiple_symbols_cancel) |
3359 | error (_("\ | |
3360 | canceled because the command is ambiguous\n\ | |
3361 | See set/show multiple-symbol.")); | |
14f9c5c9 | 3362 | |
de93309a SM |
3363 | /* If select_mode is "all", then return all possible symbols. |
3364 | Only do that if more than one symbol can be selected, of course. | |
3365 | Otherwise, display the menu as usual. */ | |
3366 | if (select_mode == multiple_symbols_all && max_results > 1) | |
3367 | return nsyms; | |
14f9c5c9 | 3368 | |
de93309a SM |
3369 | printf_filtered (_("[0] cancel\n")); |
3370 | if (max_results > 1) | |
3371 | printf_filtered (_("[1] all\n")); | |
14f9c5c9 | 3372 | |
de93309a | 3373 | sort_choices (syms, nsyms); |
14f9c5c9 | 3374 | |
de93309a SM |
3375 | for (i = 0; i < nsyms; i += 1) |
3376 | { | |
3377 | if (syms[i].symbol == NULL) | |
dda83cd7 | 3378 | continue; |
14f9c5c9 | 3379 | |
de93309a | 3380 | if (SYMBOL_CLASS (syms[i].symbol) == LOC_BLOCK) |
dda83cd7 SM |
3381 | { |
3382 | struct symtab_and_line sal = | |
3383 | find_function_start_sal (syms[i].symbol, 1); | |
14f9c5c9 | 3384 | |
de93309a SM |
3385 | printf_filtered ("[%d] ", i + first_choice); |
3386 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3387 | &type_print_raw_options); | |
3388 | if (sal.symtab == NULL) | |
3389 | printf_filtered (_(" at %p[<no source file available>%p]:%d\n"), | |
3390 | metadata_style.style ().ptr (), nullptr, sal.line); | |
3391 | else | |
3392 | printf_filtered | |
3393 | (_(" at %ps:%d\n"), | |
3394 | styled_string (file_name_style.style (), | |
3395 | symtab_to_filename_for_display (sal.symtab)), | |
3396 | sal.line); | |
dda83cd7 SM |
3397 | continue; |
3398 | } | |
76a01679 | 3399 | else |
dda83cd7 SM |
3400 | { |
3401 | int is_enumeral = | |
3402 | (SYMBOL_CLASS (syms[i].symbol) == LOC_CONST | |
3403 | && SYMBOL_TYPE (syms[i].symbol) != NULL | |
3404 | && SYMBOL_TYPE (syms[i].symbol)->code () == TYPE_CODE_ENUM); | |
de93309a | 3405 | struct symtab *symtab = NULL; |
4c4b4cd2 | 3406 | |
de93309a SM |
3407 | if (SYMBOL_OBJFILE_OWNED (syms[i].symbol)) |
3408 | symtab = symbol_symtab (syms[i].symbol); | |
3409 | ||
dda83cd7 | 3410 | if (SYMBOL_LINE (syms[i].symbol) != 0 && symtab != NULL) |
de93309a SM |
3411 | { |
3412 | printf_filtered ("[%d] ", i + first_choice); | |
3413 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3414 | &type_print_raw_options); | |
3415 | printf_filtered (_(" at %s:%d\n"), | |
3416 | symtab_to_filename_for_display (symtab), | |
3417 | SYMBOL_LINE (syms[i].symbol)); | |
3418 | } | |
dda83cd7 SM |
3419 | else if (is_enumeral |
3420 | && SYMBOL_TYPE (syms[i].symbol)->name () != NULL) | |
3421 | { | |
3422 | printf_filtered (("[%d] "), i + first_choice); | |
3423 | ada_print_type (SYMBOL_TYPE (syms[i].symbol), NULL, | |
3424 | gdb_stdout, -1, 0, &type_print_raw_options); | |
3425 | printf_filtered (_("'(%s) (enumeral)\n"), | |
987012b8 | 3426 | syms[i].symbol->print_name ()); |
dda83cd7 | 3427 | } |
de93309a SM |
3428 | else |
3429 | { | |
3430 | printf_filtered ("[%d] ", i + first_choice); | |
3431 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3432 | &type_print_raw_options); | |
3433 | ||
3434 | if (symtab != NULL) | |
3435 | printf_filtered (is_enumeral | |
3436 | ? _(" in %s (enumeral)\n") | |
3437 | : _(" at %s:?\n"), | |
3438 | symtab_to_filename_for_display (symtab)); | |
3439 | else | |
3440 | printf_filtered (is_enumeral | |
3441 | ? _(" (enumeral)\n") | |
3442 | : _(" at ?\n")); | |
3443 | } | |
dda83cd7 | 3444 | } |
14f9c5c9 | 3445 | } |
14f9c5c9 | 3446 | |
de93309a | 3447 | n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1, |
dda83cd7 | 3448 | "overload-choice"); |
14f9c5c9 | 3449 | |
de93309a SM |
3450 | for (i = 0; i < n_chosen; i += 1) |
3451 | syms[i] = syms[chosen[i]]; | |
14f9c5c9 | 3452 | |
de93309a SM |
3453 | return n_chosen; |
3454 | } | |
14f9c5c9 | 3455 | |
de93309a SM |
3456 | /* Resolve the operator of the subexpression beginning at |
3457 | position *POS of *EXPP. "Resolving" consists of replacing | |
3458 | the symbols that have undefined namespaces in OP_VAR_VALUE nodes | |
3459 | with their resolutions, replacing built-in operators with | |
3460 | function calls to user-defined operators, where appropriate, and, | |
3461 | when DEPROCEDURE_P is non-zero, converting function-valued variables | |
3462 | into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions | |
3463 | are as in ada_resolve, above. */ | |
14f9c5c9 | 3464 | |
de93309a SM |
3465 | static struct value * |
3466 | resolve_subexp (expression_up *expp, int *pos, int deprocedure_p, | |
dda83cd7 | 3467 | struct type *context_type, int parse_completion, |
de93309a | 3468 | innermost_block_tracker *tracker) |
14f9c5c9 | 3469 | { |
de93309a SM |
3470 | int pc = *pos; |
3471 | int i; | |
3472 | struct expression *exp; /* Convenience: == *expp. */ | |
3473 | enum exp_opcode op = (*expp)->elts[pc].opcode; | |
3474 | struct value **argvec; /* Vector of operand types (alloca'ed). */ | |
3475 | int nargs; /* Number of operands. */ | |
3476 | int oplen; | |
14f9c5c9 | 3477 | |
de93309a SM |
3478 | argvec = NULL; |
3479 | nargs = 0; | |
3480 | exp = expp->get (); | |
4c4b4cd2 | 3481 | |
de93309a SM |
3482 | /* Pass one: resolve operands, saving their types and updating *pos, |
3483 | if needed. */ | |
3484 | switch (op) | |
3485 | { | |
3486 | case OP_FUNCALL: | |
3487 | if (exp->elts[pc + 3].opcode == OP_VAR_VALUE | |
dda83cd7 SM |
3488 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) |
3489 | *pos += 7; | |
de93309a | 3490 | else |
dda83cd7 SM |
3491 | { |
3492 | *pos += 3; | |
3493 | resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3494 | } | |
de93309a SM |
3495 | nargs = longest_to_int (exp->elts[pc + 1].longconst); |
3496 | break; | |
14f9c5c9 | 3497 | |
de93309a SM |
3498 | case UNOP_ADDR: |
3499 | *pos += 1; | |
3500 | resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3501 | break; | |
3502 | ||
3503 | case UNOP_QUAL: | |
3504 | *pos += 3; | |
3505 | resolve_subexp (expp, pos, 1, check_typedef (exp->elts[pc + 1].type), | |
3506 | parse_completion, tracker); | |
3507 | break; | |
3508 | ||
3509 | case OP_ATR_MODULUS: | |
3510 | case OP_ATR_SIZE: | |
3511 | case OP_ATR_TAG: | |
3512 | case OP_ATR_FIRST: | |
3513 | case OP_ATR_LAST: | |
3514 | case OP_ATR_LENGTH: | |
3515 | case OP_ATR_POS: | |
3516 | case OP_ATR_VAL: | |
3517 | case OP_ATR_MIN: | |
3518 | case OP_ATR_MAX: | |
3519 | case TERNOP_IN_RANGE: | |
3520 | case BINOP_IN_BOUNDS: | |
3521 | case UNOP_IN_RANGE: | |
3522 | case OP_AGGREGATE: | |
3523 | case OP_OTHERS: | |
3524 | case OP_CHOICES: | |
3525 | case OP_POSITIONAL: | |
3526 | case OP_DISCRETE_RANGE: | |
3527 | case OP_NAME: | |
3528 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
3529 | *pos += oplen; | |
3530 | break; | |
3531 | ||
3532 | case BINOP_ASSIGN: | |
3533 | { | |
dda83cd7 SM |
3534 | struct value *arg1; |
3535 | ||
3536 | *pos += 1; | |
3537 | arg1 = resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3538 | if (arg1 == NULL) | |
3539 | resolve_subexp (expp, pos, 1, NULL, parse_completion, tracker); | |
3540 | else | |
3541 | resolve_subexp (expp, pos, 1, value_type (arg1), parse_completion, | |
de93309a | 3542 | tracker); |
dda83cd7 | 3543 | break; |
de93309a SM |
3544 | } |
3545 | ||
3546 | case UNOP_CAST: | |
3547 | *pos += 3; | |
3548 | nargs = 1; | |
3549 | break; | |
3550 | ||
3551 | case BINOP_ADD: | |
3552 | case BINOP_SUB: | |
3553 | case BINOP_MUL: | |
3554 | case BINOP_DIV: | |
3555 | case BINOP_REM: | |
3556 | case BINOP_MOD: | |
3557 | case BINOP_EXP: | |
3558 | case BINOP_CONCAT: | |
3559 | case BINOP_LOGICAL_AND: | |
3560 | case BINOP_LOGICAL_OR: | |
3561 | case BINOP_BITWISE_AND: | |
3562 | case BINOP_BITWISE_IOR: | |
3563 | case BINOP_BITWISE_XOR: | |
3564 | ||
3565 | case BINOP_EQUAL: | |
3566 | case BINOP_NOTEQUAL: | |
3567 | case BINOP_LESS: | |
3568 | case BINOP_GTR: | |
3569 | case BINOP_LEQ: | |
3570 | case BINOP_GEQ: | |
3571 | ||
3572 | case BINOP_REPEAT: | |
3573 | case BINOP_SUBSCRIPT: | |
3574 | case BINOP_COMMA: | |
3575 | *pos += 1; | |
3576 | nargs = 2; | |
3577 | break; | |
3578 | ||
3579 | case UNOP_NEG: | |
3580 | case UNOP_PLUS: | |
3581 | case UNOP_LOGICAL_NOT: | |
3582 | case UNOP_ABS: | |
3583 | case UNOP_IND: | |
3584 | *pos += 1; | |
3585 | nargs = 1; | |
3586 | break; | |
3587 | ||
3588 | case OP_LONG: | |
3589 | case OP_FLOAT: | |
3590 | case OP_VAR_VALUE: | |
3591 | case OP_VAR_MSYM_VALUE: | |
3592 | *pos += 4; | |
3593 | break; | |
3594 | ||
3595 | case OP_TYPE: | |
3596 | case OP_BOOL: | |
3597 | case OP_LAST: | |
3598 | case OP_INTERNALVAR: | |
3599 | *pos += 3; | |
3600 | break; | |
3601 | ||
3602 | case UNOP_MEMVAL: | |
3603 | *pos += 3; | |
3604 | nargs = 1; | |
3605 | break; | |
3606 | ||
3607 | case OP_REGISTER: | |
3608 | *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1); | |
3609 | break; | |
3610 | ||
3611 | case STRUCTOP_STRUCT: | |
3612 | *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1); | |
3613 | nargs = 1; | |
3614 | break; | |
3615 | ||
3616 | case TERNOP_SLICE: | |
3617 | *pos += 1; | |
3618 | nargs = 3; | |
3619 | break; | |
3620 | ||
3621 | case OP_STRING: | |
3622 | break; | |
3623 | ||
3624 | default: | |
3625 | error (_("Unexpected operator during name resolution")); | |
14f9c5c9 | 3626 | } |
14f9c5c9 | 3627 | |
de93309a SM |
3628 | argvec = XALLOCAVEC (struct value *, nargs + 1); |
3629 | for (i = 0; i < nargs; i += 1) | |
3630 | argvec[i] = resolve_subexp (expp, pos, 1, NULL, parse_completion, | |
3631 | tracker); | |
3632 | argvec[i] = NULL; | |
3633 | exp = expp->get (); | |
4c4b4cd2 | 3634 | |
de93309a SM |
3635 | /* Pass two: perform any resolution on principal operator. */ |
3636 | switch (op) | |
14f9c5c9 | 3637 | { |
de93309a SM |
3638 | default: |
3639 | break; | |
5b4ee69b | 3640 | |
de93309a SM |
3641 | case OP_VAR_VALUE: |
3642 | if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN) | |
dda83cd7 SM |
3643 | { |
3644 | std::vector<struct block_symbol> candidates; | |
3645 | int n_candidates; | |
3646 | ||
3647 | n_candidates = | |
3648 | ada_lookup_symbol_list (exp->elts[pc + 2].symbol->linkage_name (), | |
3649 | exp->elts[pc + 1].block, VAR_DOMAIN, | |
3650 | &candidates); | |
3651 | ||
3652 | if (n_candidates > 1) | |
3653 | { | |
3654 | /* Types tend to get re-introduced locally, so if there | |
3655 | are any local symbols that are not types, first filter | |
3656 | out all types. */ | |
3657 | int j; | |
3658 | for (j = 0; j < n_candidates; j += 1) | |
3659 | switch (SYMBOL_CLASS (candidates[j].symbol)) | |
3660 | { | |
3661 | case LOC_REGISTER: | |
3662 | case LOC_ARG: | |
3663 | case LOC_REF_ARG: | |
3664 | case LOC_REGPARM_ADDR: | |
3665 | case LOC_LOCAL: | |
3666 | case LOC_COMPUTED: | |
3667 | goto FoundNonType; | |
3668 | default: | |
3669 | break; | |
3670 | } | |
3671 | FoundNonType: | |
3672 | if (j < n_candidates) | |
3673 | { | |
3674 | j = 0; | |
3675 | while (j < n_candidates) | |
3676 | { | |
3677 | if (SYMBOL_CLASS (candidates[j].symbol) == LOC_TYPEDEF) | |
3678 | { | |
3679 | candidates[j] = candidates[n_candidates - 1]; | |
3680 | n_candidates -= 1; | |
3681 | } | |
3682 | else | |
3683 | j += 1; | |
3684 | } | |
3685 | } | |
3686 | } | |
3687 | ||
3688 | if (n_candidates == 0) | |
3689 | error (_("No definition found for %s"), | |
3690 | exp->elts[pc + 2].symbol->print_name ()); | |
3691 | else if (n_candidates == 1) | |
3692 | i = 0; | |
3693 | else if (deprocedure_p | |
3694 | && !is_nonfunction (candidates.data (), n_candidates)) | |
3695 | { | |
3696 | i = ada_resolve_function | |
3697 | (candidates.data (), n_candidates, NULL, 0, | |
3698 | exp->elts[pc + 2].symbol->linkage_name (), | |
3699 | context_type, parse_completion); | |
3700 | if (i < 0) | |
3701 | error (_("Could not find a match for %s"), | |
3702 | exp->elts[pc + 2].symbol->print_name ()); | |
3703 | } | |
3704 | else | |
3705 | { | |
3706 | printf_filtered (_("Multiple matches for %s\n"), | |
3707 | exp->elts[pc + 2].symbol->print_name ()); | |
3708 | user_select_syms (candidates.data (), n_candidates, 1); | |
3709 | i = 0; | |
3710 | } | |
3711 | ||
3712 | exp->elts[pc + 1].block = candidates[i].block; | |
3713 | exp->elts[pc + 2].symbol = candidates[i].symbol; | |
de93309a | 3714 | tracker->update (candidates[i]); |
dda83cd7 | 3715 | } |
14f9c5c9 | 3716 | |
de93309a | 3717 | if (deprocedure_p |
dda83cd7 SM |
3718 | && (SYMBOL_TYPE (exp->elts[pc + 2].symbol)->code () |
3719 | == TYPE_CODE_FUNC)) | |
3720 | { | |
3721 | replace_operator_with_call (expp, pc, 0, 4, | |
3722 | exp->elts[pc + 2].symbol, | |
3723 | exp->elts[pc + 1].block); | |
3724 | exp = expp->get (); | |
3725 | } | |
de93309a SM |
3726 | break; |
3727 | ||
3728 | case OP_FUNCALL: | |
3729 | { | |
dda83cd7 SM |
3730 | if (exp->elts[pc + 3].opcode == OP_VAR_VALUE |
3731 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) | |
3732 | { | |
de93309a | 3733 | std::vector<struct block_symbol> candidates; |
dda83cd7 SM |
3734 | int n_candidates; |
3735 | ||
3736 | n_candidates = | |
3737 | ada_lookup_symbol_list (exp->elts[pc + 5].symbol->linkage_name (), | |
3738 | exp->elts[pc + 4].block, VAR_DOMAIN, | |
3739 | &candidates); | |
3740 | ||
3741 | if (n_candidates == 1) | |
3742 | i = 0; | |
3743 | else | |
3744 | { | |
3745 | i = ada_resolve_function | |
3746 | (candidates.data (), n_candidates, | |
3747 | argvec, nargs, | |
3748 | exp->elts[pc + 5].symbol->linkage_name (), | |
3749 | context_type, parse_completion); | |
3750 | if (i < 0) | |
3751 | error (_("Could not find a match for %s"), | |
3752 | exp->elts[pc + 5].symbol->print_name ()); | |
3753 | } | |
3754 | ||
3755 | exp->elts[pc + 4].block = candidates[i].block; | |
3756 | exp->elts[pc + 5].symbol = candidates[i].symbol; | |
de93309a | 3757 | tracker->update (candidates[i]); |
dda83cd7 | 3758 | } |
de93309a SM |
3759 | } |
3760 | break; | |
3761 | case BINOP_ADD: | |
3762 | case BINOP_SUB: | |
3763 | case BINOP_MUL: | |
3764 | case BINOP_DIV: | |
3765 | case BINOP_REM: | |
3766 | case BINOP_MOD: | |
3767 | case BINOP_CONCAT: | |
3768 | case BINOP_BITWISE_AND: | |
3769 | case BINOP_BITWISE_IOR: | |
3770 | case BINOP_BITWISE_XOR: | |
3771 | case BINOP_EQUAL: | |
3772 | case BINOP_NOTEQUAL: | |
3773 | case BINOP_LESS: | |
3774 | case BINOP_GTR: | |
3775 | case BINOP_LEQ: | |
3776 | case BINOP_GEQ: | |
3777 | case BINOP_EXP: | |
3778 | case UNOP_NEG: | |
3779 | case UNOP_PLUS: | |
3780 | case UNOP_LOGICAL_NOT: | |
3781 | case UNOP_ABS: | |
3782 | if (possible_user_operator_p (op, argvec)) | |
dda83cd7 | 3783 | { |
de93309a | 3784 | std::vector<struct block_symbol> candidates; |
dda83cd7 | 3785 | int n_candidates; |
d72413e6 | 3786 | |
dda83cd7 SM |
3787 | n_candidates = |
3788 | ada_lookup_symbol_list (ada_decoded_op_name (op), | |
de93309a | 3789 | NULL, VAR_DOMAIN, |
dda83cd7 | 3790 | &candidates); |
d72413e6 | 3791 | |
dda83cd7 | 3792 | i = ada_resolve_function (candidates.data (), n_candidates, argvec, |
de93309a SM |
3793 | nargs, ada_decoded_op_name (op), NULL, |
3794 | parse_completion); | |
dda83cd7 SM |
3795 | if (i < 0) |
3796 | break; | |
d72413e6 | 3797 | |
de93309a SM |
3798 | replace_operator_with_call (expp, pc, nargs, 1, |
3799 | candidates[i].symbol, | |
3800 | candidates[i].block); | |
dda83cd7 SM |
3801 | exp = expp->get (); |
3802 | } | |
de93309a | 3803 | break; |
d72413e6 | 3804 | |
de93309a SM |
3805 | case OP_TYPE: |
3806 | case OP_REGISTER: | |
3807 | return NULL; | |
d72413e6 | 3808 | } |
d72413e6 | 3809 | |
de93309a SM |
3810 | *pos = pc; |
3811 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE) | |
3812 | return evaluate_var_msym_value (EVAL_AVOID_SIDE_EFFECTS, | |
3813 | exp->elts[pc + 1].objfile, | |
3814 | exp->elts[pc + 2].msymbol); | |
3815 | else | |
3816 | return evaluate_subexp_type (exp, pos); | |
3817 | } | |
14f9c5c9 | 3818 | |
de93309a SM |
3819 | /* Return non-zero if formal type FTYPE matches actual type ATYPE. If |
3820 | MAY_DEREF is non-zero, the formal may be a pointer and the actual | |
3821 | a non-pointer. */ | |
3822 | /* The term "match" here is rather loose. The match is heuristic and | |
3823 | liberal. */ | |
14f9c5c9 | 3824 | |
de93309a SM |
3825 | static int |
3826 | ada_type_match (struct type *ftype, struct type *atype, int may_deref) | |
14f9c5c9 | 3827 | { |
de93309a SM |
3828 | ftype = ada_check_typedef (ftype); |
3829 | atype = ada_check_typedef (atype); | |
14f9c5c9 | 3830 | |
78134374 | 3831 | if (ftype->code () == TYPE_CODE_REF) |
de93309a | 3832 | ftype = TYPE_TARGET_TYPE (ftype); |
78134374 | 3833 | if (atype->code () == TYPE_CODE_REF) |
de93309a | 3834 | atype = TYPE_TARGET_TYPE (atype); |
14f9c5c9 | 3835 | |
78134374 | 3836 | switch (ftype->code ()) |
14f9c5c9 | 3837 | { |
de93309a | 3838 | default: |
78134374 | 3839 | return ftype->code () == atype->code (); |
de93309a | 3840 | case TYPE_CODE_PTR: |
78134374 | 3841 | if (atype->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
3842 | return ada_type_match (TYPE_TARGET_TYPE (ftype), |
3843 | TYPE_TARGET_TYPE (atype), 0); | |
d2e4a39e | 3844 | else |
dda83cd7 SM |
3845 | return (may_deref |
3846 | && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0)); | |
de93309a SM |
3847 | case TYPE_CODE_INT: |
3848 | case TYPE_CODE_ENUM: | |
3849 | case TYPE_CODE_RANGE: | |
78134374 | 3850 | switch (atype->code ()) |
dda83cd7 SM |
3851 | { |
3852 | case TYPE_CODE_INT: | |
3853 | case TYPE_CODE_ENUM: | |
3854 | case TYPE_CODE_RANGE: | |
3855 | return 1; | |
3856 | default: | |
3857 | return 0; | |
3858 | } | |
d2e4a39e | 3859 | |
de93309a | 3860 | case TYPE_CODE_ARRAY: |
78134374 | 3861 | return (atype->code () == TYPE_CODE_ARRAY |
dda83cd7 | 3862 | || ada_is_array_descriptor_type (atype)); |
14f9c5c9 | 3863 | |
de93309a SM |
3864 | case TYPE_CODE_STRUCT: |
3865 | if (ada_is_array_descriptor_type (ftype)) | |
dda83cd7 SM |
3866 | return (atype->code () == TYPE_CODE_ARRAY |
3867 | || ada_is_array_descriptor_type (atype)); | |
de93309a | 3868 | else |
dda83cd7 SM |
3869 | return (atype->code () == TYPE_CODE_STRUCT |
3870 | && !ada_is_array_descriptor_type (atype)); | |
14f9c5c9 | 3871 | |
de93309a SM |
3872 | case TYPE_CODE_UNION: |
3873 | case TYPE_CODE_FLT: | |
78134374 | 3874 | return (atype->code () == ftype->code ()); |
de93309a | 3875 | } |
14f9c5c9 AS |
3876 | } |
3877 | ||
de93309a SM |
3878 | /* Return non-zero if the formals of FUNC "sufficiently match" the |
3879 | vector of actual argument types ACTUALS of size N_ACTUALS. FUNC | |
3880 | may also be an enumeral, in which case it is treated as a 0- | |
3881 | argument function. */ | |
14f9c5c9 | 3882 | |
de93309a SM |
3883 | static int |
3884 | ada_args_match (struct symbol *func, struct value **actuals, int n_actuals) | |
3885 | { | |
3886 | int i; | |
3887 | struct type *func_type = SYMBOL_TYPE (func); | |
14f9c5c9 | 3888 | |
de93309a | 3889 | if (SYMBOL_CLASS (func) == LOC_CONST |
78134374 | 3890 | && func_type->code () == TYPE_CODE_ENUM) |
de93309a | 3891 | return (n_actuals == 0); |
78134374 | 3892 | else if (func_type == NULL || func_type->code () != TYPE_CODE_FUNC) |
de93309a | 3893 | return 0; |
14f9c5c9 | 3894 | |
1f704f76 | 3895 | if (func_type->num_fields () != n_actuals) |
de93309a | 3896 | return 0; |
14f9c5c9 | 3897 | |
de93309a SM |
3898 | for (i = 0; i < n_actuals; i += 1) |
3899 | { | |
3900 | if (actuals[i] == NULL) | |
dda83cd7 | 3901 | return 0; |
de93309a | 3902 | else |
dda83cd7 SM |
3903 | { |
3904 | struct type *ftype = ada_check_typedef (func_type->field (i).type ()); | |
3905 | struct type *atype = ada_check_typedef (value_type (actuals[i])); | |
14f9c5c9 | 3906 | |
dda83cd7 SM |
3907 | if (!ada_type_match (ftype, atype, 1)) |
3908 | return 0; | |
3909 | } | |
de93309a SM |
3910 | } |
3911 | return 1; | |
3912 | } | |
d2e4a39e | 3913 | |
de93309a SM |
3914 | /* False iff function type FUNC_TYPE definitely does not produce a value |
3915 | compatible with type CONTEXT_TYPE. Conservatively returns 1 if | |
3916 | FUNC_TYPE is not a valid function type with a non-null return type | |
3917 | or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */ | |
14f9c5c9 | 3918 | |
de93309a SM |
3919 | static int |
3920 | return_match (struct type *func_type, struct type *context_type) | |
3921 | { | |
3922 | struct type *return_type; | |
d2e4a39e | 3923 | |
de93309a SM |
3924 | if (func_type == NULL) |
3925 | return 1; | |
14f9c5c9 | 3926 | |
78134374 | 3927 | if (func_type->code () == TYPE_CODE_FUNC) |
de93309a SM |
3928 | return_type = get_base_type (TYPE_TARGET_TYPE (func_type)); |
3929 | else | |
3930 | return_type = get_base_type (func_type); | |
3931 | if (return_type == NULL) | |
3932 | return 1; | |
76a01679 | 3933 | |
de93309a | 3934 | context_type = get_base_type (context_type); |
14f9c5c9 | 3935 | |
78134374 | 3936 | if (return_type->code () == TYPE_CODE_ENUM) |
de93309a SM |
3937 | return context_type == NULL || return_type == context_type; |
3938 | else if (context_type == NULL) | |
78134374 | 3939 | return return_type->code () != TYPE_CODE_VOID; |
de93309a | 3940 | else |
78134374 | 3941 | return return_type->code () == context_type->code (); |
de93309a | 3942 | } |
14f9c5c9 | 3943 | |
14f9c5c9 | 3944 | |
de93309a SM |
3945 | /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the |
3946 | function (if any) that matches the types of the NARGS arguments in | |
3947 | ARGS. If CONTEXT_TYPE is non-null and there is at least one match | |
3948 | that returns that type, then eliminate matches that don't. If | |
3949 | CONTEXT_TYPE is void and there is at least one match that does not | |
3950 | return void, eliminate all matches that do. | |
14f9c5c9 | 3951 | |
de93309a SM |
3952 | Asks the user if there is more than one match remaining. Returns -1 |
3953 | if there is no such symbol or none is selected. NAME is used | |
3954 | solely for messages. May re-arrange and modify SYMS in | |
3955 | the process; the index returned is for the modified vector. */ | |
14f9c5c9 | 3956 | |
de93309a SM |
3957 | static int |
3958 | ada_resolve_function (struct block_symbol syms[], | |
dda83cd7 SM |
3959 | int nsyms, struct value **args, int nargs, |
3960 | const char *name, struct type *context_type, | |
de93309a SM |
3961 | int parse_completion) |
3962 | { | |
3963 | int fallback; | |
3964 | int k; | |
3965 | int m; /* Number of hits */ | |
14f9c5c9 | 3966 | |
de93309a SM |
3967 | m = 0; |
3968 | /* In the first pass of the loop, we only accept functions matching | |
3969 | context_type. If none are found, we add a second pass of the loop | |
3970 | where every function is accepted. */ | |
3971 | for (fallback = 0; m == 0 && fallback < 2; fallback++) | |
3972 | { | |
3973 | for (k = 0; k < nsyms; k += 1) | |
dda83cd7 SM |
3974 | { |
3975 | struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].symbol)); | |
5b4ee69b | 3976 | |
dda83cd7 SM |
3977 | if (ada_args_match (syms[k].symbol, args, nargs) |
3978 | && (fallback || return_match (type, context_type))) | |
3979 | { | |
3980 | syms[m] = syms[k]; | |
3981 | m += 1; | |
3982 | } | |
3983 | } | |
14f9c5c9 AS |
3984 | } |
3985 | ||
de93309a SM |
3986 | /* If we got multiple matches, ask the user which one to use. Don't do this |
3987 | interactive thing during completion, though, as the purpose of the | |
3988 | completion is providing a list of all possible matches. Prompting the | |
3989 | user to filter it down would be completely unexpected in this case. */ | |
3990 | if (m == 0) | |
3991 | return -1; | |
3992 | else if (m > 1 && !parse_completion) | |
3993 | { | |
3994 | printf_filtered (_("Multiple matches for %s\n"), name); | |
3995 | user_select_syms (syms, m, 1); | |
3996 | return 0; | |
3997 | } | |
3998 | return 0; | |
14f9c5c9 AS |
3999 | } |
4000 | ||
4c4b4cd2 PH |
4001 | /* Replace the operator of length OPLEN at position PC in *EXPP with a call |
4002 | on the function identified by SYM and BLOCK, and taking NARGS | |
4003 | arguments. Update *EXPP as needed to hold more space. */ | |
14f9c5c9 AS |
4004 | |
4005 | static void | |
e9d9f57e | 4006 | replace_operator_with_call (expression_up *expp, int pc, int nargs, |
dda83cd7 SM |
4007 | int oplen, struct symbol *sym, |
4008 | const struct block *block) | |
14f9c5c9 | 4009 | { |
00158a68 TT |
4010 | /* We want to add 6 more elements (3 for funcall, 4 for function |
4011 | symbol, -OPLEN for operator being replaced) to the | |
4012 | expression. */ | |
e9d9f57e | 4013 | struct expression *exp = expp->get (); |
00158a68 | 4014 | int save_nelts = exp->nelts; |
f51f9f1d TV |
4015 | int extra_elts = 7 - oplen; |
4016 | exp->nelts += extra_elts; | |
14f9c5c9 | 4017 | |
f51f9f1d TV |
4018 | if (extra_elts > 0) |
4019 | exp->resize (exp->nelts); | |
00158a68 TT |
4020 | memmove (exp->elts + pc + 7, exp->elts + pc + oplen, |
4021 | EXP_ELEM_TO_BYTES (save_nelts - pc - oplen)); | |
f51f9f1d TV |
4022 | if (extra_elts < 0) |
4023 | exp->resize (exp->nelts); | |
14f9c5c9 | 4024 | |
00158a68 TT |
4025 | exp->elts[pc].opcode = exp->elts[pc + 2].opcode = OP_FUNCALL; |
4026 | exp->elts[pc + 1].longconst = (LONGEST) nargs; | |
14f9c5c9 | 4027 | |
00158a68 TT |
4028 | exp->elts[pc + 3].opcode = exp->elts[pc + 6].opcode = OP_VAR_VALUE; |
4029 | exp->elts[pc + 4].block = block; | |
4030 | exp->elts[pc + 5].symbol = sym; | |
d2e4a39e | 4031 | } |
14f9c5c9 AS |
4032 | |
4033 | /* Type-class predicates */ | |
4034 | ||
4c4b4cd2 PH |
4035 | /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type), |
4036 | or FLOAT). */ | |
14f9c5c9 AS |
4037 | |
4038 | static int | |
d2e4a39e | 4039 | numeric_type_p (struct type *type) |
14f9c5c9 AS |
4040 | { |
4041 | if (type == NULL) | |
4042 | return 0; | |
d2e4a39e AS |
4043 | else |
4044 | { | |
78134374 | 4045 | switch (type->code ()) |
dda83cd7 SM |
4046 | { |
4047 | case TYPE_CODE_INT: | |
4048 | case TYPE_CODE_FLT: | |
4049 | return 1; | |
4050 | case TYPE_CODE_RANGE: | |
4051 | return (type == TYPE_TARGET_TYPE (type) | |
4052 | || numeric_type_p (TYPE_TARGET_TYPE (type))); | |
4053 | default: | |
4054 | return 0; | |
4055 | } | |
d2e4a39e | 4056 | } |
14f9c5c9 AS |
4057 | } |
4058 | ||
4c4b4cd2 | 4059 | /* True iff TYPE is integral (an INT or RANGE of INTs). */ |
14f9c5c9 AS |
4060 | |
4061 | static int | |
d2e4a39e | 4062 | integer_type_p (struct type *type) |
14f9c5c9 AS |
4063 | { |
4064 | if (type == NULL) | |
4065 | return 0; | |
d2e4a39e AS |
4066 | else |
4067 | { | |
78134374 | 4068 | switch (type->code ()) |
dda83cd7 SM |
4069 | { |
4070 | case TYPE_CODE_INT: | |
4071 | return 1; | |
4072 | case TYPE_CODE_RANGE: | |
4073 | return (type == TYPE_TARGET_TYPE (type) | |
4074 | || integer_type_p (TYPE_TARGET_TYPE (type))); | |
4075 | default: | |
4076 | return 0; | |
4077 | } | |
d2e4a39e | 4078 | } |
14f9c5c9 AS |
4079 | } |
4080 | ||
4c4b4cd2 | 4081 | /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */ |
14f9c5c9 AS |
4082 | |
4083 | static int | |
d2e4a39e | 4084 | scalar_type_p (struct type *type) |
14f9c5c9 AS |
4085 | { |
4086 | if (type == NULL) | |
4087 | return 0; | |
d2e4a39e AS |
4088 | else |
4089 | { | |
78134374 | 4090 | switch (type->code ()) |
dda83cd7 SM |
4091 | { |
4092 | case TYPE_CODE_INT: | |
4093 | case TYPE_CODE_RANGE: | |
4094 | case TYPE_CODE_ENUM: | |
4095 | case TYPE_CODE_FLT: | |
4096 | return 1; | |
4097 | default: | |
4098 | return 0; | |
4099 | } | |
d2e4a39e | 4100 | } |
14f9c5c9 AS |
4101 | } |
4102 | ||
4c4b4cd2 | 4103 | /* True iff TYPE is discrete (INT, RANGE, ENUM). */ |
14f9c5c9 AS |
4104 | |
4105 | static int | |
d2e4a39e | 4106 | discrete_type_p (struct type *type) |
14f9c5c9 AS |
4107 | { |
4108 | if (type == NULL) | |
4109 | return 0; | |
d2e4a39e AS |
4110 | else |
4111 | { | |
78134374 | 4112 | switch (type->code ()) |
dda83cd7 SM |
4113 | { |
4114 | case TYPE_CODE_INT: | |
4115 | case TYPE_CODE_RANGE: | |
4116 | case TYPE_CODE_ENUM: | |
4117 | case TYPE_CODE_BOOL: | |
4118 | return 1; | |
4119 | default: | |
4120 | return 0; | |
4121 | } | |
d2e4a39e | 4122 | } |
14f9c5c9 AS |
4123 | } |
4124 | ||
4c4b4cd2 PH |
4125 | /* Returns non-zero if OP with operands in the vector ARGS could be |
4126 | a user-defined function. Errs on the side of pre-defined operators | |
4127 | (i.e., result 0). */ | |
14f9c5c9 AS |
4128 | |
4129 | static int | |
d2e4a39e | 4130 | possible_user_operator_p (enum exp_opcode op, struct value *args[]) |
14f9c5c9 | 4131 | { |
76a01679 | 4132 | struct type *type0 = |
df407dfe | 4133 | (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0])); |
d2e4a39e | 4134 | struct type *type1 = |
df407dfe | 4135 | (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1])); |
d2e4a39e | 4136 | |
4c4b4cd2 PH |
4137 | if (type0 == NULL) |
4138 | return 0; | |
4139 | ||
14f9c5c9 AS |
4140 | switch (op) |
4141 | { | |
4142 | default: | |
4143 | return 0; | |
4144 | ||
4145 | case BINOP_ADD: | |
4146 | case BINOP_SUB: | |
4147 | case BINOP_MUL: | |
4148 | case BINOP_DIV: | |
d2e4a39e | 4149 | return (!(numeric_type_p (type0) && numeric_type_p (type1))); |
14f9c5c9 AS |
4150 | |
4151 | case BINOP_REM: | |
4152 | case BINOP_MOD: | |
4153 | case BINOP_BITWISE_AND: | |
4154 | case BINOP_BITWISE_IOR: | |
4155 | case BINOP_BITWISE_XOR: | |
d2e4a39e | 4156 | return (!(integer_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4157 | |
4158 | case BINOP_EQUAL: | |
4159 | case BINOP_NOTEQUAL: | |
4160 | case BINOP_LESS: | |
4161 | case BINOP_GTR: | |
4162 | case BINOP_LEQ: | |
4163 | case BINOP_GEQ: | |
d2e4a39e | 4164 | return (!(scalar_type_p (type0) && scalar_type_p (type1))); |
14f9c5c9 AS |
4165 | |
4166 | case BINOP_CONCAT: | |
ee90b9ab | 4167 | return !ada_is_array_type (type0) || !ada_is_array_type (type1); |
14f9c5c9 AS |
4168 | |
4169 | case BINOP_EXP: | |
d2e4a39e | 4170 | return (!(numeric_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4171 | |
4172 | case UNOP_NEG: | |
4173 | case UNOP_PLUS: | |
4174 | case UNOP_LOGICAL_NOT: | |
d2e4a39e AS |
4175 | case UNOP_ABS: |
4176 | return (!numeric_type_p (type0)); | |
14f9c5c9 AS |
4177 | |
4178 | } | |
4179 | } | |
4180 | \f | |
dda83cd7 | 4181 | /* Renaming */ |
14f9c5c9 | 4182 | |
aeb5907d JB |
4183 | /* NOTES: |
4184 | ||
4185 | 1. In the following, we assume that a renaming type's name may | |
4186 | have an ___XD suffix. It would be nice if this went away at some | |
4187 | point. | |
4188 | 2. We handle both the (old) purely type-based representation of | |
4189 | renamings and the (new) variable-based encoding. At some point, | |
4190 | it is devoutly to be hoped that the former goes away | |
4191 | (FIXME: hilfinger-2007-07-09). | |
4192 | 3. Subprogram renamings are not implemented, although the XRS | |
4193 | suffix is recognized (FIXME: hilfinger-2007-07-09). */ | |
4194 | ||
4195 | /* If SYM encodes a renaming, | |
4196 | ||
4197 | <renaming> renames <renamed entity>, | |
4198 | ||
4199 | sets *LEN to the length of the renamed entity's name, | |
4200 | *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to | |
4201 | the string describing the subcomponent selected from the renamed | |
0963b4bd | 4202 | entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming |
aeb5907d JB |
4203 | (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR |
4204 | are undefined). Otherwise, returns a value indicating the category | |
4205 | of entity renamed: an object (ADA_OBJECT_RENAMING), exception | |
4206 | (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or | |
4207 | subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the | |
4208 | strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be | |
4209 | deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR | |
4210 | may be NULL, in which case they are not assigned. | |
4211 | ||
4212 | [Currently, however, GCC does not generate subprogram renamings.] */ | |
4213 | ||
4214 | enum ada_renaming_category | |
4215 | ada_parse_renaming (struct symbol *sym, | |
4216 | const char **renamed_entity, int *len, | |
4217 | const char **renaming_expr) | |
4218 | { | |
4219 | enum ada_renaming_category kind; | |
4220 | const char *info; | |
4221 | const char *suffix; | |
4222 | ||
4223 | if (sym == NULL) | |
4224 | return ADA_NOT_RENAMING; | |
4225 | switch (SYMBOL_CLASS (sym)) | |
14f9c5c9 | 4226 | { |
aeb5907d JB |
4227 | default: |
4228 | return ADA_NOT_RENAMING; | |
aeb5907d JB |
4229 | case LOC_LOCAL: |
4230 | case LOC_STATIC: | |
4231 | case LOC_COMPUTED: | |
4232 | case LOC_OPTIMIZED_OUT: | |
987012b8 | 4233 | info = strstr (sym->linkage_name (), "___XR"); |
aeb5907d JB |
4234 | if (info == NULL) |
4235 | return ADA_NOT_RENAMING; | |
4236 | switch (info[5]) | |
4237 | { | |
4238 | case '_': | |
4239 | kind = ADA_OBJECT_RENAMING; | |
4240 | info += 6; | |
4241 | break; | |
4242 | case 'E': | |
4243 | kind = ADA_EXCEPTION_RENAMING; | |
4244 | info += 7; | |
4245 | break; | |
4246 | case 'P': | |
4247 | kind = ADA_PACKAGE_RENAMING; | |
4248 | info += 7; | |
4249 | break; | |
4250 | case 'S': | |
4251 | kind = ADA_SUBPROGRAM_RENAMING; | |
4252 | info += 7; | |
4253 | break; | |
4254 | default: | |
4255 | return ADA_NOT_RENAMING; | |
4256 | } | |
14f9c5c9 | 4257 | } |
4c4b4cd2 | 4258 | |
de93309a SM |
4259 | if (renamed_entity != NULL) |
4260 | *renamed_entity = info; | |
4261 | suffix = strstr (info, "___XE"); | |
4262 | if (suffix == NULL || suffix == info) | |
4263 | return ADA_NOT_RENAMING; | |
4264 | if (len != NULL) | |
4265 | *len = strlen (info) - strlen (suffix); | |
4266 | suffix += 5; | |
4267 | if (renaming_expr != NULL) | |
4268 | *renaming_expr = suffix; | |
4269 | return kind; | |
4270 | } | |
4271 | ||
4272 | /* Compute the value of the given RENAMING_SYM, which is expected to | |
4273 | be a symbol encoding a renaming expression. BLOCK is the block | |
4274 | used to evaluate the renaming. */ | |
4275 | ||
4276 | static struct value * | |
4277 | ada_read_renaming_var_value (struct symbol *renaming_sym, | |
4278 | const struct block *block) | |
4279 | { | |
4280 | const char *sym_name; | |
4281 | ||
987012b8 | 4282 | sym_name = renaming_sym->linkage_name (); |
de93309a SM |
4283 | expression_up expr = parse_exp_1 (&sym_name, 0, block, 0); |
4284 | return evaluate_expression (expr.get ()); | |
4285 | } | |
4286 | \f | |
4287 | ||
dda83cd7 | 4288 | /* Evaluation: Function Calls */ |
de93309a SM |
4289 | |
4290 | /* Return an lvalue containing the value VAL. This is the identity on | |
4291 | lvalues, and otherwise has the side-effect of allocating memory | |
4292 | in the inferior where a copy of the value contents is copied. */ | |
4293 | ||
4294 | static struct value * | |
4295 | ensure_lval (struct value *val) | |
4296 | { | |
4297 | if (VALUE_LVAL (val) == not_lval | |
4298 | || VALUE_LVAL (val) == lval_internalvar) | |
4299 | { | |
4300 | int len = TYPE_LENGTH (ada_check_typedef (value_type (val))); | |
4301 | const CORE_ADDR addr = | |
dda83cd7 | 4302 | value_as_long (value_allocate_space_in_inferior (len)); |
de93309a SM |
4303 | |
4304 | VALUE_LVAL (val) = lval_memory; | |
4305 | set_value_address (val, addr); | |
4306 | write_memory (addr, value_contents (val), len); | |
4307 | } | |
4308 | ||
4309 | return val; | |
4310 | } | |
4311 | ||
4312 | /* Given ARG, a value of type (pointer or reference to a)* | |
4313 | structure/union, extract the component named NAME from the ultimate | |
4314 | target structure/union and return it as a value with its | |
4315 | appropriate type. | |
4316 | ||
4317 | The routine searches for NAME among all members of the structure itself | |
4318 | and (recursively) among all members of any wrapper members | |
4319 | (e.g., '_parent'). | |
4320 | ||
4321 | If NO_ERR, then simply return NULL in case of error, rather than | |
4322 | calling error. */ | |
4323 | ||
4324 | static struct value * | |
4325 | ada_value_struct_elt (struct value *arg, const char *name, int no_err) | |
4326 | { | |
4327 | struct type *t, *t1; | |
4328 | struct value *v; | |
4329 | int check_tag; | |
4330 | ||
4331 | v = NULL; | |
4332 | t1 = t = ada_check_typedef (value_type (arg)); | |
78134374 | 4333 | if (t->code () == TYPE_CODE_REF) |
de93309a SM |
4334 | { |
4335 | t1 = TYPE_TARGET_TYPE (t); | |
4336 | if (t1 == NULL) | |
4337 | goto BadValue; | |
4338 | t1 = ada_check_typedef (t1); | |
78134374 | 4339 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4340 | { |
4341 | arg = coerce_ref (arg); | |
4342 | t = t1; | |
4343 | } | |
de93309a SM |
4344 | } |
4345 | ||
78134374 | 4346 | while (t->code () == TYPE_CODE_PTR) |
de93309a SM |
4347 | { |
4348 | t1 = TYPE_TARGET_TYPE (t); | |
4349 | if (t1 == NULL) | |
4350 | goto BadValue; | |
4351 | t1 = ada_check_typedef (t1); | |
78134374 | 4352 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4353 | { |
4354 | arg = value_ind (arg); | |
4355 | t = t1; | |
4356 | } | |
de93309a | 4357 | else |
dda83cd7 | 4358 | break; |
de93309a | 4359 | } |
aeb5907d | 4360 | |
78134374 | 4361 | if (t1->code () != TYPE_CODE_STRUCT && t1->code () != TYPE_CODE_UNION) |
de93309a | 4362 | goto BadValue; |
52ce6436 | 4363 | |
de93309a SM |
4364 | if (t1 == t) |
4365 | v = ada_search_struct_field (name, arg, 0, t); | |
4366 | else | |
4367 | { | |
4368 | int bit_offset, bit_size, byte_offset; | |
4369 | struct type *field_type; | |
4370 | CORE_ADDR address; | |
a5ee536b | 4371 | |
78134374 | 4372 | if (t->code () == TYPE_CODE_PTR) |
de93309a SM |
4373 | address = value_address (ada_value_ind (arg)); |
4374 | else | |
4375 | address = value_address (ada_coerce_ref (arg)); | |
d2e4a39e | 4376 | |
de93309a | 4377 | /* Check to see if this is a tagged type. We also need to handle |
dda83cd7 SM |
4378 | the case where the type is a reference to a tagged type, but |
4379 | we have to be careful to exclude pointers to tagged types. | |
4380 | The latter should be shown as usual (as a pointer), whereas | |
4381 | a reference should mostly be transparent to the user. */ | |
14f9c5c9 | 4382 | |
de93309a | 4383 | if (ada_is_tagged_type (t1, 0) |
dda83cd7 SM |
4384 | || (t1->code () == TYPE_CODE_REF |
4385 | && ada_is_tagged_type (TYPE_TARGET_TYPE (t1), 0))) | |
4386 | { | |
4387 | /* We first try to find the searched field in the current type. | |
de93309a | 4388 | If not found then let's look in the fixed type. */ |
14f9c5c9 | 4389 | |
dda83cd7 SM |
4390 | if (!find_struct_field (name, t1, 0, |
4391 | &field_type, &byte_offset, &bit_offset, | |
4392 | &bit_size, NULL)) | |
de93309a SM |
4393 | check_tag = 1; |
4394 | else | |
4395 | check_tag = 0; | |
dda83cd7 | 4396 | } |
de93309a SM |
4397 | else |
4398 | check_tag = 0; | |
c3e5cd34 | 4399 | |
de93309a SM |
4400 | /* Convert to fixed type in all cases, so that we have proper |
4401 | offsets to each field in unconstrained record types. */ | |
4402 | t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, | |
4403 | address, NULL, check_tag); | |
4404 | ||
24aa1b02 TT |
4405 | /* Resolve the dynamic type as well. */ |
4406 | arg = value_from_contents_and_address (t1, nullptr, address); | |
4407 | t1 = value_type (arg); | |
4408 | ||
de93309a | 4409 | if (find_struct_field (name, t1, 0, |
dda83cd7 SM |
4410 | &field_type, &byte_offset, &bit_offset, |
4411 | &bit_size, NULL)) | |
4412 | { | |
4413 | if (bit_size != 0) | |
4414 | { | |
4415 | if (t->code () == TYPE_CODE_REF) | |
4416 | arg = ada_coerce_ref (arg); | |
4417 | else | |
4418 | arg = ada_value_ind (arg); | |
4419 | v = ada_value_primitive_packed_val (arg, NULL, byte_offset, | |
4420 | bit_offset, bit_size, | |
4421 | field_type); | |
4422 | } | |
4423 | else | |
4424 | v = value_at_lazy (field_type, address + byte_offset); | |
4425 | } | |
c3e5cd34 | 4426 | } |
14f9c5c9 | 4427 | |
de93309a SM |
4428 | if (v != NULL || no_err) |
4429 | return v; | |
4430 | else | |
4431 | error (_("There is no member named %s."), name); | |
4432 | ||
4433 | BadValue: | |
4434 | if (no_err) | |
4435 | return NULL; | |
4436 | else | |
4437 | error (_("Attempt to extract a component of " | |
4438 | "a value that is not a record.")); | |
14f9c5c9 AS |
4439 | } |
4440 | ||
4441 | /* Return the value ACTUAL, converted to be an appropriate value for a | |
4442 | formal of type FORMAL_TYPE. Use *SP as a stack pointer for | |
4443 | allocating any necessary descriptors (fat pointers), or copies of | |
4c4b4cd2 | 4444 | values not residing in memory, updating it as needed. */ |
14f9c5c9 | 4445 | |
a93c0eb6 | 4446 | struct value * |
40bc484c | 4447 | ada_convert_actual (struct value *actual, struct type *formal_type0) |
14f9c5c9 | 4448 | { |
df407dfe | 4449 | struct type *actual_type = ada_check_typedef (value_type (actual)); |
61ee279c | 4450 | struct type *formal_type = ada_check_typedef (formal_type0); |
d2e4a39e | 4451 | struct type *formal_target = |
78134374 | 4452 | formal_type->code () == TYPE_CODE_PTR |
61ee279c | 4453 | ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type; |
d2e4a39e | 4454 | struct type *actual_target = |
78134374 | 4455 | actual_type->code () == TYPE_CODE_PTR |
61ee279c | 4456 | ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type; |
14f9c5c9 | 4457 | |
4c4b4cd2 | 4458 | if (ada_is_array_descriptor_type (formal_target) |
78134374 | 4459 | && actual_target->code () == TYPE_CODE_ARRAY) |
40bc484c | 4460 | return make_array_descriptor (formal_type, actual); |
78134374 SM |
4461 | else if (formal_type->code () == TYPE_CODE_PTR |
4462 | || formal_type->code () == TYPE_CODE_REF) | |
14f9c5c9 | 4463 | { |
a84a8a0d | 4464 | struct value *result; |
5b4ee69b | 4465 | |
78134374 | 4466 | if (formal_target->code () == TYPE_CODE_ARRAY |
dda83cd7 | 4467 | && ada_is_array_descriptor_type (actual_target)) |
a84a8a0d | 4468 | result = desc_data (actual); |
78134374 | 4469 | else if (formal_type->code () != TYPE_CODE_PTR) |
dda83cd7 SM |
4470 | { |
4471 | if (VALUE_LVAL (actual) != lval_memory) | |
4472 | { | |
4473 | struct value *val; | |
4474 | ||
4475 | actual_type = ada_check_typedef (value_type (actual)); | |
4476 | val = allocate_value (actual_type); | |
4477 | memcpy ((char *) value_contents_raw (val), | |
4478 | (char *) value_contents (actual), | |
4479 | TYPE_LENGTH (actual_type)); | |
4480 | actual = ensure_lval (val); | |
4481 | } | |
4482 | result = value_addr (actual); | |
4483 | } | |
a84a8a0d JB |
4484 | else |
4485 | return actual; | |
b1af9e97 | 4486 | return value_cast_pointers (formal_type, result, 0); |
14f9c5c9 | 4487 | } |
78134374 | 4488 | else if (actual_type->code () == TYPE_CODE_PTR) |
14f9c5c9 | 4489 | return ada_value_ind (actual); |
8344af1e JB |
4490 | else if (ada_is_aligner_type (formal_type)) |
4491 | { | |
4492 | /* We need to turn this parameter into an aligner type | |
4493 | as well. */ | |
4494 | struct value *aligner = allocate_value (formal_type); | |
4495 | struct value *component = ada_value_struct_elt (aligner, "F", 0); | |
4496 | ||
4497 | value_assign_to_component (aligner, component, actual); | |
4498 | return aligner; | |
4499 | } | |
14f9c5c9 AS |
4500 | |
4501 | return actual; | |
4502 | } | |
4503 | ||
438c98a1 JB |
4504 | /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of |
4505 | type TYPE. This is usually an inefficient no-op except on some targets | |
4506 | (such as AVR) where the representation of a pointer and an address | |
4507 | differs. */ | |
4508 | ||
4509 | static CORE_ADDR | |
4510 | value_pointer (struct value *value, struct type *type) | |
4511 | { | |
4512 | struct gdbarch *gdbarch = get_type_arch (type); | |
4513 | unsigned len = TYPE_LENGTH (type); | |
224c3ddb | 4514 | gdb_byte *buf = (gdb_byte *) alloca (len); |
438c98a1 JB |
4515 | CORE_ADDR addr; |
4516 | ||
4517 | addr = value_address (value); | |
4518 | gdbarch_address_to_pointer (gdbarch, type, buf, addr); | |
34877895 | 4519 | addr = extract_unsigned_integer (buf, len, type_byte_order (type)); |
438c98a1 JB |
4520 | return addr; |
4521 | } | |
4522 | ||
14f9c5c9 | 4523 | |
4c4b4cd2 PH |
4524 | /* Push a descriptor of type TYPE for array value ARR on the stack at |
4525 | *SP, updating *SP to reflect the new descriptor. Return either | |
14f9c5c9 | 4526 | an lvalue representing the new descriptor, or (if TYPE is a pointer- |
4c4b4cd2 PH |
4527 | to-descriptor type rather than a descriptor type), a struct value * |
4528 | representing a pointer to this descriptor. */ | |
14f9c5c9 | 4529 | |
d2e4a39e | 4530 | static struct value * |
40bc484c | 4531 | make_array_descriptor (struct type *type, struct value *arr) |
14f9c5c9 | 4532 | { |
d2e4a39e AS |
4533 | struct type *bounds_type = desc_bounds_type (type); |
4534 | struct type *desc_type = desc_base_type (type); | |
4535 | struct value *descriptor = allocate_value (desc_type); | |
4536 | struct value *bounds = allocate_value (bounds_type); | |
14f9c5c9 | 4537 | int i; |
d2e4a39e | 4538 | |
0963b4bd MS |
4539 | for (i = ada_array_arity (ada_check_typedef (value_type (arr))); |
4540 | i > 0; i -= 1) | |
14f9c5c9 | 4541 | { |
19f220c3 JK |
4542 | modify_field (value_type (bounds), value_contents_writeable (bounds), |
4543 | ada_array_bound (arr, i, 0), | |
4544 | desc_bound_bitpos (bounds_type, i, 0), | |
4545 | desc_bound_bitsize (bounds_type, i, 0)); | |
4546 | modify_field (value_type (bounds), value_contents_writeable (bounds), | |
4547 | ada_array_bound (arr, i, 1), | |
4548 | desc_bound_bitpos (bounds_type, i, 1), | |
4549 | desc_bound_bitsize (bounds_type, i, 1)); | |
14f9c5c9 | 4550 | } |
d2e4a39e | 4551 | |
40bc484c | 4552 | bounds = ensure_lval (bounds); |
d2e4a39e | 4553 | |
19f220c3 JK |
4554 | modify_field (value_type (descriptor), |
4555 | value_contents_writeable (descriptor), | |
4556 | value_pointer (ensure_lval (arr), | |
940da03e | 4557 | desc_type->field (0).type ()), |
19f220c3 JK |
4558 | fat_pntr_data_bitpos (desc_type), |
4559 | fat_pntr_data_bitsize (desc_type)); | |
4560 | ||
4561 | modify_field (value_type (descriptor), | |
4562 | value_contents_writeable (descriptor), | |
4563 | value_pointer (bounds, | |
940da03e | 4564 | desc_type->field (1).type ()), |
19f220c3 JK |
4565 | fat_pntr_bounds_bitpos (desc_type), |
4566 | fat_pntr_bounds_bitsize (desc_type)); | |
14f9c5c9 | 4567 | |
40bc484c | 4568 | descriptor = ensure_lval (descriptor); |
14f9c5c9 | 4569 | |
78134374 | 4570 | if (type->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
4571 | return value_addr (descriptor); |
4572 | else | |
4573 | return descriptor; | |
4574 | } | |
14f9c5c9 | 4575 | \f |
dda83cd7 | 4576 | /* Symbol Cache Module */ |
3d9434b5 | 4577 | |
3d9434b5 | 4578 | /* Performance measurements made as of 2010-01-15 indicate that |
ee01b665 | 4579 | this cache does bring some noticeable improvements. Depending |
3d9434b5 JB |
4580 | on the type of entity being printed, the cache can make it as much |
4581 | as an order of magnitude faster than without it. | |
4582 | ||
4583 | The descriptive type DWARF extension has significantly reduced | |
4584 | the need for this cache, at least when DWARF is being used. However, | |
4585 | even in this case, some expensive name-based symbol searches are still | |
4586 | sometimes necessary - to find an XVZ variable, mostly. */ | |
4587 | ||
ee01b665 | 4588 | /* Initialize the contents of SYM_CACHE. */ |
3d9434b5 | 4589 | |
ee01b665 JB |
4590 | static void |
4591 | ada_init_symbol_cache (struct ada_symbol_cache *sym_cache) | |
4592 | { | |
4593 | obstack_init (&sym_cache->cache_space); | |
4594 | memset (sym_cache->root, '\000', sizeof (sym_cache->root)); | |
4595 | } | |
3d9434b5 | 4596 | |
ee01b665 JB |
4597 | /* Free the memory used by SYM_CACHE. */ |
4598 | ||
4599 | static void | |
4600 | ada_free_symbol_cache (struct ada_symbol_cache *sym_cache) | |
3d9434b5 | 4601 | { |
ee01b665 JB |
4602 | obstack_free (&sym_cache->cache_space, NULL); |
4603 | xfree (sym_cache); | |
4604 | } | |
3d9434b5 | 4605 | |
ee01b665 JB |
4606 | /* Return the symbol cache associated to the given program space PSPACE. |
4607 | If not allocated for this PSPACE yet, allocate and initialize one. */ | |
3d9434b5 | 4608 | |
ee01b665 JB |
4609 | static struct ada_symbol_cache * |
4610 | ada_get_symbol_cache (struct program_space *pspace) | |
4611 | { | |
4612 | struct ada_pspace_data *pspace_data = get_ada_pspace_data (pspace); | |
ee01b665 | 4613 | |
66c168ae | 4614 | if (pspace_data->sym_cache == NULL) |
ee01b665 | 4615 | { |
66c168ae JB |
4616 | pspace_data->sym_cache = XCNEW (struct ada_symbol_cache); |
4617 | ada_init_symbol_cache (pspace_data->sym_cache); | |
ee01b665 JB |
4618 | } |
4619 | ||
66c168ae | 4620 | return pspace_data->sym_cache; |
ee01b665 | 4621 | } |
3d9434b5 JB |
4622 | |
4623 | /* Clear all entries from the symbol cache. */ | |
4624 | ||
4625 | static void | |
4626 | ada_clear_symbol_cache (void) | |
4627 | { | |
ee01b665 JB |
4628 | struct ada_symbol_cache *sym_cache |
4629 | = ada_get_symbol_cache (current_program_space); | |
4630 | ||
4631 | obstack_free (&sym_cache->cache_space, NULL); | |
4632 | ada_init_symbol_cache (sym_cache); | |
3d9434b5 JB |
4633 | } |
4634 | ||
fe978cb0 | 4635 | /* Search our cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4636 | Return it if found, or NULL otherwise. */ |
4637 | ||
4638 | static struct cache_entry ** | |
fe978cb0 | 4639 | find_entry (const char *name, domain_enum domain) |
3d9434b5 | 4640 | { |
ee01b665 JB |
4641 | struct ada_symbol_cache *sym_cache |
4642 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 JB |
4643 | int h = msymbol_hash (name) % HASH_SIZE; |
4644 | struct cache_entry **e; | |
4645 | ||
ee01b665 | 4646 | for (e = &sym_cache->root[h]; *e != NULL; e = &(*e)->next) |
3d9434b5 | 4647 | { |
fe978cb0 | 4648 | if (domain == (*e)->domain && strcmp (name, (*e)->name) == 0) |
dda83cd7 | 4649 | return e; |
3d9434b5 JB |
4650 | } |
4651 | return NULL; | |
4652 | } | |
4653 | ||
fe978cb0 | 4654 | /* Search the symbol cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4655 | Return 1 if found, 0 otherwise. |
4656 | ||
4657 | If an entry was found and SYM is not NULL, set *SYM to the entry's | |
4658 | SYM. Same principle for BLOCK if not NULL. */ | |
96d887e8 | 4659 | |
96d887e8 | 4660 | static int |
fe978cb0 | 4661 | lookup_cached_symbol (const char *name, domain_enum domain, |
dda83cd7 | 4662 | struct symbol **sym, const struct block **block) |
96d887e8 | 4663 | { |
fe978cb0 | 4664 | struct cache_entry **e = find_entry (name, domain); |
3d9434b5 JB |
4665 | |
4666 | if (e == NULL) | |
4667 | return 0; | |
4668 | if (sym != NULL) | |
4669 | *sym = (*e)->sym; | |
4670 | if (block != NULL) | |
4671 | *block = (*e)->block; | |
4672 | return 1; | |
96d887e8 PH |
4673 | } |
4674 | ||
3d9434b5 | 4675 | /* Assuming that (SYM, BLOCK) is the result of the lookup of NAME |
fe978cb0 | 4676 | in domain DOMAIN, save this result in our symbol cache. */ |
3d9434b5 | 4677 | |
96d887e8 | 4678 | static void |
fe978cb0 | 4679 | cache_symbol (const char *name, domain_enum domain, struct symbol *sym, |
dda83cd7 | 4680 | const struct block *block) |
96d887e8 | 4681 | { |
ee01b665 JB |
4682 | struct ada_symbol_cache *sym_cache |
4683 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 | 4684 | int h; |
3d9434b5 JB |
4685 | struct cache_entry *e; |
4686 | ||
1994afbf DE |
4687 | /* Symbols for builtin types don't have a block. |
4688 | For now don't cache such symbols. */ | |
4689 | if (sym != NULL && !SYMBOL_OBJFILE_OWNED (sym)) | |
4690 | return; | |
4691 | ||
3d9434b5 JB |
4692 | /* If the symbol is a local symbol, then do not cache it, as a search |
4693 | for that symbol depends on the context. To determine whether | |
4694 | the symbol is local or not, we check the block where we found it | |
4695 | against the global and static blocks of its associated symtab. */ | |
4696 | if (sym | |
08be3fe3 | 4697 | && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)), |
439247b6 | 4698 | GLOBAL_BLOCK) != block |
08be3fe3 | 4699 | && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)), |
439247b6 | 4700 | STATIC_BLOCK) != block) |
3d9434b5 JB |
4701 | return; |
4702 | ||
4703 | h = msymbol_hash (name) % HASH_SIZE; | |
e39db4db | 4704 | e = XOBNEW (&sym_cache->cache_space, cache_entry); |
ee01b665 JB |
4705 | e->next = sym_cache->root[h]; |
4706 | sym_cache->root[h] = e; | |
2ef5453b | 4707 | e->name = obstack_strdup (&sym_cache->cache_space, name); |
3d9434b5 | 4708 | e->sym = sym; |
fe978cb0 | 4709 | e->domain = domain; |
3d9434b5 | 4710 | e->block = block; |
96d887e8 | 4711 | } |
4c4b4cd2 | 4712 | \f |
dda83cd7 | 4713 | /* Symbol Lookup */ |
4c4b4cd2 | 4714 | |
b5ec771e PA |
4715 | /* Return the symbol name match type that should be used used when |
4716 | searching for all symbols matching LOOKUP_NAME. | |
c0431670 JB |
4717 | |
4718 | LOOKUP_NAME is expected to be a symbol name after transformation | |
f98b2e33 | 4719 | for Ada lookups. */ |
c0431670 | 4720 | |
b5ec771e PA |
4721 | static symbol_name_match_type |
4722 | name_match_type_from_name (const char *lookup_name) | |
c0431670 | 4723 | { |
b5ec771e PA |
4724 | return (strstr (lookup_name, "__") == NULL |
4725 | ? symbol_name_match_type::WILD | |
4726 | : symbol_name_match_type::FULL); | |
c0431670 JB |
4727 | } |
4728 | ||
4c4b4cd2 PH |
4729 | /* Return the result of a standard (literal, C-like) lookup of NAME in |
4730 | given DOMAIN, visible from lexical block BLOCK. */ | |
4731 | ||
4732 | static struct symbol * | |
4733 | standard_lookup (const char *name, const struct block *block, | |
dda83cd7 | 4734 | domain_enum domain) |
4c4b4cd2 | 4735 | { |
acbd605d | 4736 | /* Initialize it just to avoid a GCC false warning. */ |
6640a367 | 4737 | struct block_symbol sym = {}; |
4c4b4cd2 | 4738 | |
d12307c1 PMR |
4739 | if (lookup_cached_symbol (name, domain, &sym.symbol, NULL)) |
4740 | return sym.symbol; | |
a2cd4f14 | 4741 | ada_lookup_encoded_symbol (name, block, domain, &sym); |
d12307c1 PMR |
4742 | cache_symbol (name, domain, sym.symbol, sym.block); |
4743 | return sym.symbol; | |
4c4b4cd2 PH |
4744 | } |
4745 | ||
4746 | ||
4747 | /* Non-zero iff there is at least one non-function/non-enumeral symbol | |
4748 | in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions, | |
4749 | since they contend in overloading in the same way. */ | |
4750 | static int | |
d12307c1 | 4751 | is_nonfunction (struct block_symbol syms[], int n) |
4c4b4cd2 PH |
4752 | { |
4753 | int i; | |
4754 | ||
4755 | for (i = 0; i < n; i += 1) | |
78134374 | 4756 | if (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_FUNC |
dda83cd7 SM |
4757 | && (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_ENUM |
4758 | || SYMBOL_CLASS (syms[i].symbol) != LOC_CONST)) | |
14f9c5c9 AS |
4759 | return 1; |
4760 | ||
4761 | return 0; | |
4762 | } | |
4763 | ||
4764 | /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent | |
4c4b4cd2 | 4765 | struct types. Otherwise, they may not. */ |
14f9c5c9 AS |
4766 | |
4767 | static int | |
d2e4a39e | 4768 | equiv_types (struct type *type0, struct type *type1) |
14f9c5c9 | 4769 | { |
d2e4a39e | 4770 | if (type0 == type1) |
14f9c5c9 | 4771 | return 1; |
d2e4a39e | 4772 | if (type0 == NULL || type1 == NULL |
78134374 | 4773 | || type0->code () != type1->code ()) |
14f9c5c9 | 4774 | return 0; |
78134374 SM |
4775 | if ((type0->code () == TYPE_CODE_STRUCT |
4776 | || type0->code () == TYPE_CODE_ENUM) | |
14f9c5c9 | 4777 | && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL |
4c4b4cd2 | 4778 | && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0) |
14f9c5c9 | 4779 | return 1; |
d2e4a39e | 4780 | |
14f9c5c9 AS |
4781 | return 0; |
4782 | } | |
4783 | ||
4784 | /* True iff SYM0 represents the same entity as SYM1, or one that is | |
4c4b4cd2 | 4785 | no more defined than that of SYM1. */ |
14f9c5c9 AS |
4786 | |
4787 | static int | |
d2e4a39e | 4788 | lesseq_defined_than (struct symbol *sym0, struct symbol *sym1) |
14f9c5c9 AS |
4789 | { |
4790 | if (sym0 == sym1) | |
4791 | return 1; | |
176620f1 | 4792 | if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1) |
14f9c5c9 AS |
4793 | || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1)) |
4794 | return 0; | |
4795 | ||
d2e4a39e | 4796 | switch (SYMBOL_CLASS (sym0)) |
14f9c5c9 AS |
4797 | { |
4798 | case LOC_UNDEF: | |
4799 | return 1; | |
4800 | case LOC_TYPEDEF: | |
4801 | { | |
dda83cd7 SM |
4802 | struct type *type0 = SYMBOL_TYPE (sym0); |
4803 | struct type *type1 = SYMBOL_TYPE (sym1); | |
4804 | const char *name0 = sym0->linkage_name (); | |
4805 | const char *name1 = sym1->linkage_name (); | |
4806 | int len0 = strlen (name0); | |
4807 | ||
4808 | return | |
4809 | type0->code () == type1->code () | |
4810 | && (equiv_types (type0, type1) | |
4811 | || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0 | |
4812 | && startswith (name1 + len0, "___XV"))); | |
14f9c5c9 AS |
4813 | } |
4814 | case LOC_CONST: | |
4815 | return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1) | |
dda83cd7 | 4816 | && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1)); |
4b610737 TT |
4817 | |
4818 | case LOC_STATIC: | |
4819 | { | |
dda83cd7 SM |
4820 | const char *name0 = sym0->linkage_name (); |
4821 | const char *name1 = sym1->linkage_name (); | |
4822 | return (strcmp (name0, name1) == 0 | |
4823 | && SYMBOL_VALUE_ADDRESS (sym0) == SYMBOL_VALUE_ADDRESS (sym1)); | |
4b610737 TT |
4824 | } |
4825 | ||
d2e4a39e AS |
4826 | default: |
4827 | return 0; | |
14f9c5c9 AS |
4828 | } |
4829 | } | |
4830 | ||
d12307c1 | 4831 | /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct block_symbol |
4c4b4cd2 | 4832 | records in OBSTACKP. Do nothing if SYM is a duplicate. */ |
14f9c5c9 AS |
4833 | |
4834 | static void | |
76a01679 | 4835 | add_defn_to_vec (struct obstack *obstackp, |
dda83cd7 SM |
4836 | struct symbol *sym, |
4837 | const struct block *block) | |
14f9c5c9 AS |
4838 | { |
4839 | int i; | |
d12307c1 | 4840 | struct block_symbol *prevDefns = defns_collected (obstackp, 0); |
14f9c5c9 | 4841 | |
529cad9c PH |
4842 | /* Do not try to complete stub types, as the debugger is probably |
4843 | already scanning all symbols matching a certain name at the | |
4844 | time when this function is called. Trying to replace the stub | |
4845 | type by its associated full type will cause us to restart a scan | |
4846 | which may lead to an infinite recursion. Instead, the client | |
4847 | collecting the matching symbols will end up collecting several | |
4848 | matches, with at least one of them complete. It can then filter | |
4849 | out the stub ones if needed. */ | |
4850 | ||
4c4b4cd2 PH |
4851 | for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1) |
4852 | { | |
d12307c1 | 4853 | if (lesseq_defined_than (sym, prevDefns[i].symbol)) |
dda83cd7 | 4854 | return; |
d12307c1 | 4855 | else if (lesseq_defined_than (prevDefns[i].symbol, sym)) |
dda83cd7 SM |
4856 | { |
4857 | prevDefns[i].symbol = sym; | |
4858 | prevDefns[i].block = block; | |
4859 | return; | |
4860 | } | |
4c4b4cd2 PH |
4861 | } |
4862 | ||
4863 | { | |
d12307c1 | 4864 | struct block_symbol info; |
4c4b4cd2 | 4865 | |
d12307c1 | 4866 | info.symbol = sym; |
4c4b4cd2 | 4867 | info.block = block; |
d12307c1 | 4868 | obstack_grow (obstackp, &info, sizeof (struct block_symbol)); |
4c4b4cd2 PH |
4869 | } |
4870 | } | |
4871 | ||
d12307c1 PMR |
4872 | /* Number of block_symbol structures currently collected in current vector in |
4873 | OBSTACKP. */ | |
4c4b4cd2 | 4874 | |
76a01679 JB |
4875 | static int |
4876 | num_defns_collected (struct obstack *obstackp) | |
4c4b4cd2 | 4877 | { |
d12307c1 | 4878 | return obstack_object_size (obstackp) / sizeof (struct block_symbol); |
4c4b4cd2 PH |
4879 | } |
4880 | ||
d12307c1 PMR |
4881 | /* Vector of block_symbol structures currently collected in current vector in |
4882 | OBSTACKP. If FINISH, close off the vector and return its final address. */ | |
4c4b4cd2 | 4883 | |
d12307c1 | 4884 | static struct block_symbol * |
4c4b4cd2 PH |
4885 | defns_collected (struct obstack *obstackp, int finish) |
4886 | { | |
4887 | if (finish) | |
224c3ddb | 4888 | return (struct block_symbol *) obstack_finish (obstackp); |
4c4b4cd2 | 4889 | else |
d12307c1 | 4890 | return (struct block_symbol *) obstack_base (obstackp); |
4c4b4cd2 PH |
4891 | } |
4892 | ||
7c7b6655 TT |
4893 | /* Return a bound minimal symbol matching NAME according to Ada |
4894 | decoding rules. Returns an invalid symbol if there is no such | |
4895 | minimal symbol. Names prefixed with "standard__" are handled | |
4896 | specially: "standard__" is first stripped off, and only static and | |
4897 | global symbols are searched. */ | |
4c4b4cd2 | 4898 | |
7c7b6655 | 4899 | struct bound_minimal_symbol |
96d887e8 | 4900 | ada_lookup_simple_minsym (const char *name) |
4c4b4cd2 | 4901 | { |
7c7b6655 | 4902 | struct bound_minimal_symbol result; |
4c4b4cd2 | 4903 | |
7c7b6655 TT |
4904 | memset (&result, 0, sizeof (result)); |
4905 | ||
b5ec771e PA |
4906 | symbol_name_match_type match_type = name_match_type_from_name (name); |
4907 | lookup_name_info lookup_name (name, match_type); | |
4908 | ||
4909 | symbol_name_matcher_ftype *match_name | |
4910 | = ada_get_symbol_name_matcher (lookup_name); | |
4c4b4cd2 | 4911 | |
2030c079 | 4912 | for (objfile *objfile : current_program_space->objfiles ()) |
5325b9bf | 4913 | { |
7932255d | 4914 | for (minimal_symbol *msymbol : objfile->msymbols ()) |
5325b9bf | 4915 | { |
c9d95fa3 | 4916 | if (match_name (msymbol->linkage_name (), lookup_name, NULL) |
5325b9bf TT |
4917 | && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline) |
4918 | { | |
4919 | result.minsym = msymbol; | |
4920 | result.objfile = objfile; | |
4921 | break; | |
4922 | } | |
4923 | } | |
4924 | } | |
4c4b4cd2 | 4925 | |
7c7b6655 | 4926 | return result; |
96d887e8 | 4927 | } |
4c4b4cd2 | 4928 | |
96d887e8 PH |
4929 | /* For all subprograms that statically enclose the subprogram of the |
4930 | selected frame, add symbols matching identifier NAME in DOMAIN | |
4931 | and their blocks to the list of data in OBSTACKP, as for | |
48b78332 JB |
4932 | ada_add_block_symbols (q.v.). If WILD_MATCH_P, treat as NAME |
4933 | with a wildcard prefix. */ | |
4c4b4cd2 | 4934 | |
96d887e8 PH |
4935 | static void |
4936 | add_symbols_from_enclosing_procs (struct obstack *obstackp, | |
b5ec771e PA |
4937 | const lookup_name_info &lookup_name, |
4938 | domain_enum domain) | |
96d887e8 | 4939 | { |
96d887e8 | 4940 | } |
14f9c5c9 | 4941 | |
96d887e8 PH |
4942 | /* True if TYPE is definitely an artificial type supplied to a symbol |
4943 | for which no debugging information was given in the symbol file. */ | |
14f9c5c9 | 4944 | |
96d887e8 PH |
4945 | static int |
4946 | is_nondebugging_type (struct type *type) | |
4947 | { | |
0d5cff50 | 4948 | const char *name = ada_type_name (type); |
5b4ee69b | 4949 | |
96d887e8 PH |
4950 | return (name != NULL && strcmp (name, "<variable, no debug info>") == 0); |
4951 | } | |
4c4b4cd2 | 4952 | |
8f17729f JB |
4953 | /* Return nonzero if TYPE1 and TYPE2 are two enumeration types |
4954 | that are deemed "identical" for practical purposes. | |
4955 | ||
4956 | This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM | |
4957 | types and that their number of enumerals is identical (in other | |
1f704f76 | 4958 | words, type1->num_fields () == type2->num_fields ()). */ |
8f17729f JB |
4959 | |
4960 | static int | |
4961 | ada_identical_enum_types_p (struct type *type1, struct type *type2) | |
4962 | { | |
4963 | int i; | |
4964 | ||
4965 | /* The heuristic we use here is fairly conservative. We consider | |
4966 | that 2 enumerate types are identical if they have the same | |
4967 | number of enumerals and that all enumerals have the same | |
4968 | underlying value and name. */ | |
4969 | ||
4970 | /* All enums in the type should have an identical underlying value. */ | |
1f704f76 | 4971 | for (i = 0; i < type1->num_fields (); i++) |
14e75d8e | 4972 | if (TYPE_FIELD_ENUMVAL (type1, i) != TYPE_FIELD_ENUMVAL (type2, i)) |
8f17729f JB |
4973 | return 0; |
4974 | ||
4975 | /* All enumerals should also have the same name (modulo any numerical | |
4976 | suffix). */ | |
1f704f76 | 4977 | for (i = 0; i < type1->num_fields (); i++) |
8f17729f | 4978 | { |
0d5cff50 DE |
4979 | const char *name_1 = TYPE_FIELD_NAME (type1, i); |
4980 | const char *name_2 = TYPE_FIELD_NAME (type2, i); | |
8f17729f JB |
4981 | int len_1 = strlen (name_1); |
4982 | int len_2 = strlen (name_2); | |
4983 | ||
4984 | ada_remove_trailing_digits (TYPE_FIELD_NAME (type1, i), &len_1); | |
4985 | ada_remove_trailing_digits (TYPE_FIELD_NAME (type2, i), &len_2); | |
4986 | if (len_1 != len_2 | |
dda83cd7 | 4987 | || strncmp (TYPE_FIELD_NAME (type1, i), |
8f17729f JB |
4988 | TYPE_FIELD_NAME (type2, i), |
4989 | len_1) != 0) | |
4990 | return 0; | |
4991 | } | |
4992 | ||
4993 | return 1; | |
4994 | } | |
4995 | ||
4996 | /* Return nonzero if all the symbols in SYMS are all enumeral symbols | |
4997 | that are deemed "identical" for practical purposes. Sometimes, | |
4998 | enumerals are not strictly identical, but their types are so similar | |
4999 | that they can be considered identical. | |
5000 | ||
5001 | For instance, consider the following code: | |
5002 | ||
5003 | type Color is (Black, Red, Green, Blue, White); | |
5004 | type RGB_Color is new Color range Red .. Blue; | |
5005 | ||
5006 | Type RGB_Color is a subrange of an implicit type which is a copy | |
5007 | of type Color. If we call that implicit type RGB_ColorB ("B" is | |
5008 | for "Base Type"), then type RGB_ColorB is a copy of type Color. | |
5009 | As a result, when an expression references any of the enumeral | |
5010 | by name (Eg. "print green"), the expression is technically | |
5011 | ambiguous and the user should be asked to disambiguate. But | |
5012 | doing so would only hinder the user, since it wouldn't matter | |
5013 | what choice he makes, the outcome would always be the same. | |
5014 | So, for practical purposes, we consider them as the same. */ | |
5015 | ||
5016 | static int | |
54d343a2 | 5017 | symbols_are_identical_enums (const std::vector<struct block_symbol> &syms) |
8f17729f JB |
5018 | { |
5019 | int i; | |
5020 | ||
5021 | /* Before performing a thorough comparison check of each type, | |
5022 | we perform a series of inexpensive checks. We expect that these | |
5023 | checks will quickly fail in the vast majority of cases, and thus | |
5024 | help prevent the unnecessary use of a more expensive comparison. | |
5025 | Said comparison also expects us to make some of these checks | |
5026 | (see ada_identical_enum_types_p). */ | |
5027 | ||
5028 | /* Quick check: All symbols should have an enum type. */ | |
54d343a2 | 5029 | for (i = 0; i < syms.size (); i++) |
78134374 | 5030 | if (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_ENUM) |
8f17729f JB |
5031 | return 0; |
5032 | ||
5033 | /* Quick check: They should all have the same value. */ | |
54d343a2 | 5034 | for (i = 1; i < syms.size (); i++) |
d12307c1 | 5035 | if (SYMBOL_VALUE (syms[i].symbol) != SYMBOL_VALUE (syms[0].symbol)) |
8f17729f JB |
5036 | return 0; |
5037 | ||
5038 | /* Quick check: They should all have the same number of enumerals. */ | |
54d343a2 | 5039 | for (i = 1; i < syms.size (); i++) |
1f704f76 | 5040 | if (SYMBOL_TYPE (syms[i].symbol)->num_fields () |
dda83cd7 | 5041 | != SYMBOL_TYPE (syms[0].symbol)->num_fields ()) |
8f17729f JB |
5042 | return 0; |
5043 | ||
5044 | /* All the sanity checks passed, so we might have a set of | |
5045 | identical enumeration types. Perform a more complete | |
5046 | comparison of the type of each symbol. */ | |
54d343a2 | 5047 | for (i = 1; i < syms.size (); i++) |
d12307c1 | 5048 | if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms[i].symbol), |
dda83cd7 | 5049 | SYMBOL_TYPE (syms[0].symbol))) |
8f17729f JB |
5050 | return 0; |
5051 | ||
5052 | return 1; | |
5053 | } | |
5054 | ||
54d343a2 | 5055 | /* Remove any non-debugging symbols in SYMS that definitely |
96d887e8 PH |
5056 | duplicate other symbols in the list (The only case I know of where |
5057 | this happens is when object files containing stabs-in-ecoff are | |
5058 | linked with files containing ordinary ecoff debugging symbols (or no | |
5059 | debugging symbols)). Modifies SYMS to squeeze out deleted entries. | |
5060 | Returns the number of items in the modified list. */ | |
4c4b4cd2 | 5061 | |
96d887e8 | 5062 | static int |
54d343a2 | 5063 | remove_extra_symbols (std::vector<struct block_symbol> *syms) |
96d887e8 PH |
5064 | { |
5065 | int i, j; | |
4c4b4cd2 | 5066 | |
8f17729f JB |
5067 | /* We should never be called with less than 2 symbols, as there |
5068 | cannot be any extra symbol in that case. But it's easy to | |
5069 | handle, since we have nothing to do in that case. */ | |
54d343a2 TT |
5070 | if (syms->size () < 2) |
5071 | return syms->size (); | |
8f17729f | 5072 | |
96d887e8 | 5073 | i = 0; |
54d343a2 | 5074 | while (i < syms->size ()) |
96d887e8 | 5075 | { |
a35ddb44 | 5076 | int remove_p = 0; |
339c13b6 JB |
5077 | |
5078 | /* If two symbols have the same name and one of them is a stub type, | |
dda83cd7 | 5079 | the get rid of the stub. */ |
339c13b6 | 5080 | |
e46d3488 | 5081 | if (SYMBOL_TYPE ((*syms)[i].symbol)->is_stub () |
dda83cd7 SM |
5082 | && (*syms)[i].symbol->linkage_name () != NULL) |
5083 | { | |
5084 | for (j = 0; j < syms->size (); j++) | |
5085 | { | |
5086 | if (j != i | |
5087 | && !SYMBOL_TYPE ((*syms)[j].symbol)->is_stub () | |
5088 | && (*syms)[j].symbol->linkage_name () != NULL | |
5089 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5090 | (*syms)[j].symbol->linkage_name ()) == 0) | |
5091 | remove_p = 1; | |
5092 | } | |
5093 | } | |
339c13b6 JB |
5094 | |
5095 | /* Two symbols with the same name, same class and same address | |
dda83cd7 | 5096 | should be identical. */ |
339c13b6 | 5097 | |
987012b8 | 5098 | else if ((*syms)[i].symbol->linkage_name () != NULL |
dda83cd7 SM |
5099 | && SYMBOL_CLASS ((*syms)[i].symbol) == LOC_STATIC |
5100 | && is_nondebugging_type (SYMBOL_TYPE ((*syms)[i].symbol))) | |
5101 | { | |
5102 | for (j = 0; j < syms->size (); j += 1) | |
5103 | { | |
5104 | if (i != j | |
5105 | && (*syms)[j].symbol->linkage_name () != NULL | |
5106 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5107 | (*syms)[j].symbol->linkage_name ()) == 0 | |
5108 | && SYMBOL_CLASS ((*syms)[i].symbol) | |
54d343a2 | 5109 | == SYMBOL_CLASS ((*syms)[j].symbol) |
dda83cd7 SM |
5110 | && SYMBOL_VALUE_ADDRESS ((*syms)[i].symbol) |
5111 | == SYMBOL_VALUE_ADDRESS ((*syms)[j].symbol)) | |
5112 | remove_p = 1; | |
5113 | } | |
5114 | } | |
339c13b6 | 5115 | |
a35ddb44 | 5116 | if (remove_p) |
54d343a2 | 5117 | syms->erase (syms->begin () + i); |
1b788fb6 TT |
5118 | else |
5119 | i += 1; | |
14f9c5c9 | 5120 | } |
8f17729f JB |
5121 | |
5122 | /* If all the remaining symbols are identical enumerals, then | |
5123 | just keep the first one and discard the rest. | |
5124 | ||
5125 | Unlike what we did previously, we do not discard any entry | |
5126 | unless they are ALL identical. This is because the symbol | |
5127 | comparison is not a strict comparison, but rather a practical | |
5128 | comparison. If all symbols are considered identical, then | |
5129 | we can just go ahead and use the first one and discard the rest. | |
5130 | But if we cannot reduce the list to a single element, we have | |
5131 | to ask the user to disambiguate anyways. And if we have to | |
5132 | present a multiple-choice menu, it's less confusing if the list | |
5133 | isn't missing some choices that were identical and yet distinct. */ | |
54d343a2 TT |
5134 | if (symbols_are_identical_enums (*syms)) |
5135 | syms->resize (1); | |
8f17729f | 5136 | |
54d343a2 | 5137 | return syms->size (); |
14f9c5c9 AS |
5138 | } |
5139 | ||
96d887e8 PH |
5140 | /* Given a type that corresponds to a renaming entity, use the type name |
5141 | to extract the scope (package name or function name, fully qualified, | |
5142 | and following the GNAT encoding convention) where this renaming has been | |
49d83361 | 5143 | defined. */ |
4c4b4cd2 | 5144 | |
49d83361 | 5145 | static std::string |
96d887e8 | 5146 | xget_renaming_scope (struct type *renaming_type) |
14f9c5c9 | 5147 | { |
96d887e8 | 5148 | /* The renaming types adhere to the following convention: |
0963b4bd | 5149 | <scope>__<rename>___<XR extension>. |
96d887e8 PH |
5150 | So, to extract the scope, we search for the "___XR" extension, |
5151 | and then backtrack until we find the first "__". */ | |
76a01679 | 5152 | |
7d93a1e0 | 5153 | const char *name = renaming_type->name (); |
108d56a4 SM |
5154 | const char *suffix = strstr (name, "___XR"); |
5155 | const char *last; | |
14f9c5c9 | 5156 | |
96d887e8 PH |
5157 | /* Now, backtrack a bit until we find the first "__". Start looking |
5158 | at suffix - 3, as the <rename> part is at least one character long. */ | |
14f9c5c9 | 5159 | |
96d887e8 PH |
5160 | for (last = suffix - 3; last > name; last--) |
5161 | if (last[0] == '_' && last[1] == '_') | |
5162 | break; | |
76a01679 | 5163 | |
96d887e8 | 5164 | /* Make a copy of scope and return it. */ |
49d83361 | 5165 | return std::string (name, last); |
4c4b4cd2 PH |
5166 | } |
5167 | ||
96d887e8 | 5168 | /* Return nonzero if NAME corresponds to a package name. */ |
4c4b4cd2 | 5169 | |
96d887e8 PH |
5170 | static int |
5171 | is_package_name (const char *name) | |
4c4b4cd2 | 5172 | { |
96d887e8 PH |
5173 | /* Here, We take advantage of the fact that no symbols are generated |
5174 | for packages, while symbols are generated for each function. | |
5175 | So the condition for NAME represent a package becomes equivalent | |
5176 | to NAME not existing in our list of symbols. There is only one | |
5177 | small complication with library-level functions (see below). */ | |
4c4b4cd2 | 5178 | |
96d887e8 PH |
5179 | /* If it is a function that has not been defined at library level, |
5180 | then we should be able to look it up in the symbols. */ | |
5181 | if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL) | |
5182 | return 0; | |
14f9c5c9 | 5183 | |
96d887e8 PH |
5184 | /* Library-level function names start with "_ada_". See if function |
5185 | "_ada_" followed by NAME can be found. */ | |
14f9c5c9 | 5186 | |
96d887e8 | 5187 | /* Do a quick check that NAME does not contain "__", since library-level |
e1d5a0d2 | 5188 | functions names cannot contain "__" in them. */ |
96d887e8 PH |
5189 | if (strstr (name, "__") != NULL) |
5190 | return 0; | |
4c4b4cd2 | 5191 | |
528e1572 | 5192 | std::string fun_name = string_printf ("_ada_%s", name); |
14f9c5c9 | 5193 | |
528e1572 | 5194 | return (standard_lookup (fun_name.c_str (), NULL, VAR_DOMAIN) == NULL); |
96d887e8 | 5195 | } |
14f9c5c9 | 5196 | |
96d887e8 | 5197 | /* Return nonzero if SYM corresponds to a renaming entity that is |
aeb5907d | 5198 | not visible from FUNCTION_NAME. */ |
14f9c5c9 | 5199 | |
96d887e8 | 5200 | static int |
0d5cff50 | 5201 | old_renaming_is_invisible (const struct symbol *sym, const char *function_name) |
96d887e8 | 5202 | { |
aeb5907d JB |
5203 | if (SYMBOL_CLASS (sym) != LOC_TYPEDEF) |
5204 | return 0; | |
5205 | ||
49d83361 | 5206 | std::string scope = xget_renaming_scope (SYMBOL_TYPE (sym)); |
14f9c5c9 | 5207 | |
96d887e8 | 5208 | /* If the rename has been defined in a package, then it is visible. */ |
49d83361 TT |
5209 | if (is_package_name (scope.c_str ())) |
5210 | return 0; | |
14f9c5c9 | 5211 | |
96d887e8 PH |
5212 | /* Check that the rename is in the current function scope by checking |
5213 | that its name starts with SCOPE. */ | |
76a01679 | 5214 | |
96d887e8 PH |
5215 | /* If the function name starts with "_ada_", it means that it is |
5216 | a library-level function. Strip this prefix before doing the | |
5217 | comparison, as the encoding for the renaming does not contain | |
5218 | this prefix. */ | |
61012eef | 5219 | if (startswith (function_name, "_ada_")) |
96d887e8 | 5220 | function_name += 5; |
f26caa11 | 5221 | |
49d83361 | 5222 | return !startswith (function_name, scope.c_str ()); |
f26caa11 PH |
5223 | } |
5224 | ||
aeb5907d JB |
5225 | /* Remove entries from SYMS that corresponds to a renaming entity that |
5226 | is not visible from the function associated with CURRENT_BLOCK or | |
5227 | that is superfluous due to the presence of more specific renaming | |
5228 | information. Places surviving symbols in the initial entries of | |
5229 | SYMS and returns the number of surviving symbols. | |
96d887e8 PH |
5230 | |
5231 | Rationale: | |
aeb5907d JB |
5232 | First, in cases where an object renaming is implemented as a |
5233 | reference variable, GNAT may produce both the actual reference | |
5234 | variable and the renaming encoding. In this case, we discard the | |
5235 | latter. | |
5236 | ||
5237 | Second, GNAT emits a type following a specified encoding for each renaming | |
96d887e8 PH |
5238 | entity. Unfortunately, STABS currently does not support the definition |
5239 | of types that are local to a given lexical block, so all renamings types | |
5240 | are emitted at library level. As a consequence, if an application | |
5241 | contains two renaming entities using the same name, and a user tries to | |
5242 | print the value of one of these entities, the result of the ada symbol | |
5243 | lookup will also contain the wrong renaming type. | |
f26caa11 | 5244 | |
96d887e8 PH |
5245 | This function partially covers for this limitation by attempting to |
5246 | remove from the SYMS list renaming symbols that should be visible | |
5247 | from CURRENT_BLOCK. However, there does not seem be a 100% reliable | |
5248 | method with the current information available. The implementation | |
5249 | below has a couple of limitations (FIXME: brobecker-2003-05-12): | |
5250 | ||
5251 | - When the user tries to print a rename in a function while there | |
dda83cd7 SM |
5252 | is another rename entity defined in a package: Normally, the |
5253 | rename in the function has precedence over the rename in the | |
5254 | package, so the latter should be removed from the list. This is | |
5255 | currently not the case. | |
5256 | ||
96d887e8 | 5257 | - This function will incorrectly remove valid renames if |
dda83cd7 SM |
5258 | the CURRENT_BLOCK corresponds to a function which symbol name |
5259 | has been changed by an "Export" pragma. As a consequence, | |
5260 | the user will be unable to print such rename entities. */ | |
4c4b4cd2 | 5261 | |
14f9c5c9 | 5262 | static int |
54d343a2 TT |
5263 | remove_irrelevant_renamings (std::vector<struct block_symbol> *syms, |
5264 | const struct block *current_block) | |
4c4b4cd2 PH |
5265 | { |
5266 | struct symbol *current_function; | |
0d5cff50 | 5267 | const char *current_function_name; |
4c4b4cd2 | 5268 | int i; |
aeb5907d JB |
5269 | int is_new_style_renaming; |
5270 | ||
5271 | /* If there is both a renaming foo___XR... encoded as a variable and | |
5272 | a simple variable foo in the same block, discard the latter. | |
0963b4bd | 5273 | First, zero out such symbols, then compress. */ |
aeb5907d | 5274 | is_new_style_renaming = 0; |
54d343a2 | 5275 | for (i = 0; i < syms->size (); i += 1) |
aeb5907d | 5276 | { |
54d343a2 TT |
5277 | struct symbol *sym = (*syms)[i].symbol; |
5278 | const struct block *block = (*syms)[i].block; | |
aeb5907d JB |
5279 | const char *name; |
5280 | const char *suffix; | |
5281 | ||
5282 | if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF) | |
5283 | continue; | |
987012b8 | 5284 | name = sym->linkage_name (); |
aeb5907d JB |
5285 | suffix = strstr (name, "___XR"); |
5286 | ||
5287 | if (suffix != NULL) | |
5288 | { | |
5289 | int name_len = suffix - name; | |
5290 | int j; | |
5b4ee69b | 5291 | |
aeb5907d | 5292 | is_new_style_renaming = 1; |
54d343a2 TT |
5293 | for (j = 0; j < syms->size (); j += 1) |
5294 | if (i != j && (*syms)[j].symbol != NULL | |
987012b8 | 5295 | && strncmp (name, (*syms)[j].symbol->linkage_name (), |
aeb5907d | 5296 | name_len) == 0 |
54d343a2 TT |
5297 | && block == (*syms)[j].block) |
5298 | (*syms)[j].symbol = NULL; | |
aeb5907d JB |
5299 | } |
5300 | } | |
5301 | if (is_new_style_renaming) | |
5302 | { | |
5303 | int j, k; | |
5304 | ||
54d343a2 TT |
5305 | for (j = k = 0; j < syms->size (); j += 1) |
5306 | if ((*syms)[j].symbol != NULL) | |
aeb5907d | 5307 | { |
54d343a2 | 5308 | (*syms)[k] = (*syms)[j]; |
aeb5907d JB |
5309 | k += 1; |
5310 | } | |
5311 | return k; | |
5312 | } | |
4c4b4cd2 PH |
5313 | |
5314 | /* Extract the function name associated to CURRENT_BLOCK. | |
5315 | Abort if unable to do so. */ | |
76a01679 | 5316 | |
4c4b4cd2 | 5317 | if (current_block == NULL) |
54d343a2 | 5318 | return syms->size (); |
76a01679 | 5319 | |
7f0df278 | 5320 | current_function = block_linkage_function (current_block); |
4c4b4cd2 | 5321 | if (current_function == NULL) |
54d343a2 | 5322 | return syms->size (); |
4c4b4cd2 | 5323 | |
987012b8 | 5324 | current_function_name = current_function->linkage_name (); |
4c4b4cd2 | 5325 | if (current_function_name == NULL) |
54d343a2 | 5326 | return syms->size (); |
4c4b4cd2 PH |
5327 | |
5328 | /* Check each of the symbols, and remove it from the list if it is | |
5329 | a type corresponding to a renaming that is out of the scope of | |
5330 | the current block. */ | |
5331 | ||
5332 | i = 0; | |
54d343a2 | 5333 | while (i < syms->size ()) |
4c4b4cd2 | 5334 | { |
54d343a2 | 5335 | if (ada_parse_renaming ((*syms)[i].symbol, NULL, NULL, NULL) |
dda83cd7 SM |
5336 | == ADA_OBJECT_RENAMING |
5337 | && old_renaming_is_invisible ((*syms)[i].symbol, | |
54d343a2 TT |
5338 | current_function_name)) |
5339 | syms->erase (syms->begin () + i); | |
4c4b4cd2 | 5340 | else |
dda83cd7 | 5341 | i += 1; |
4c4b4cd2 PH |
5342 | } |
5343 | ||
54d343a2 | 5344 | return syms->size (); |
4c4b4cd2 PH |
5345 | } |
5346 | ||
339c13b6 JB |
5347 | /* Add to OBSTACKP all symbols from BLOCK (and its super-blocks) |
5348 | whose name and domain match NAME and DOMAIN respectively. | |
5349 | If no match was found, then extend the search to "enclosing" | |
5350 | routines (in other words, if we're inside a nested function, | |
5351 | search the symbols defined inside the enclosing functions). | |
d0a8ab18 JB |
5352 | If WILD_MATCH_P is nonzero, perform the naming matching in |
5353 | "wild" mode (see function "wild_match" for more info). | |
339c13b6 JB |
5354 | |
5355 | Note: This function assumes that OBSTACKP has 0 (zero) element in it. */ | |
5356 | ||
5357 | static void | |
b5ec771e PA |
5358 | ada_add_local_symbols (struct obstack *obstackp, |
5359 | const lookup_name_info &lookup_name, | |
5360 | const struct block *block, domain_enum domain) | |
339c13b6 JB |
5361 | { |
5362 | int block_depth = 0; | |
5363 | ||
5364 | while (block != NULL) | |
5365 | { | |
5366 | block_depth += 1; | |
b5ec771e | 5367 | ada_add_block_symbols (obstackp, block, lookup_name, domain, NULL); |
339c13b6 JB |
5368 | |
5369 | /* If we found a non-function match, assume that's the one. */ | |
5370 | if (is_nonfunction (defns_collected (obstackp, 0), | |
dda83cd7 SM |
5371 | num_defns_collected (obstackp))) |
5372 | return; | |
339c13b6 JB |
5373 | |
5374 | block = BLOCK_SUPERBLOCK (block); | |
5375 | } | |
5376 | ||
5377 | /* If no luck so far, try to find NAME as a local symbol in some lexically | |
5378 | enclosing subprogram. */ | |
5379 | if (num_defns_collected (obstackp) == 0 && block_depth > 2) | |
b5ec771e | 5380 | add_symbols_from_enclosing_procs (obstackp, lookup_name, domain); |
339c13b6 JB |
5381 | } |
5382 | ||
ccefe4c4 | 5383 | /* An object of this type is used as the user_data argument when |
40658b94 | 5384 | calling the map_matching_symbols method. */ |
ccefe4c4 | 5385 | |
40658b94 | 5386 | struct match_data |
ccefe4c4 | 5387 | { |
40658b94 | 5388 | struct objfile *objfile; |
ccefe4c4 | 5389 | struct obstack *obstackp; |
40658b94 PH |
5390 | struct symbol *arg_sym; |
5391 | int found_sym; | |
ccefe4c4 TT |
5392 | }; |
5393 | ||
199b4314 TT |
5394 | /* A callback for add_nonlocal_symbols that adds symbol, found in BSYM, |
5395 | to a list of symbols. DATA is a pointer to a struct match_data * | |
40658b94 PH |
5396 | containing the obstack that collects the symbol list, the file that SYM |
5397 | must come from, a flag indicating whether a non-argument symbol has | |
5398 | been found in the current block, and the last argument symbol | |
5399 | passed in SYM within the current block (if any). When SYM is null, | |
5400 | marking the end of a block, the argument symbol is added if no | |
5401 | other has been found. */ | |
ccefe4c4 | 5402 | |
199b4314 TT |
5403 | static bool |
5404 | aux_add_nonlocal_symbols (struct block_symbol *bsym, | |
5405 | struct match_data *data) | |
ccefe4c4 | 5406 | { |
199b4314 TT |
5407 | const struct block *block = bsym->block; |
5408 | struct symbol *sym = bsym->symbol; | |
5409 | ||
40658b94 PH |
5410 | if (sym == NULL) |
5411 | { | |
5412 | if (!data->found_sym && data->arg_sym != NULL) | |
5413 | add_defn_to_vec (data->obstackp, | |
5414 | fixup_symbol_section (data->arg_sym, data->objfile), | |
5415 | block); | |
5416 | data->found_sym = 0; | |
5417 | data->arg_sym = NULL; | |
5418 | } | |
5419 | else | |
5420 | { | |
5421 | if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED) | |
199b4314 | 5422 | return true; |
40658b94 PH |
5423 | else if (SYMBOL_IS_ARGUMENT (sym)) |
5424 | data->arg_sym = sym; | |
5425 | else | |
5426 | { | |
5427 | data->found_sym = 1; | |
5428 | add_defn_to_vec (data->obstackp, | |
5429 | fixup_symbol_section (sym, data->objfile), | |
5430 | block); | |
5431 | } | |
5432 | } | |
199b4314 | 5433 | return true; |
40658b94 PH |
5434 | } |
5435 | ||
b5ec771e PA |
5436 | /* Helper for add_nonlocal_symbols. Find symbols in DOMAIN which are |
5437 | targeted by renamings matching LOOKUP_NAME in BLOCK. Add these | |
5438 | symbols to OBSTACKP. Return whether we found such symbols. */ | |
22cee43f PMR |
5439 | |
5440 | static int | |
5441 | ada_add_block_renamings (struct obstack *obstackp, | |
5442 | const struct block *block, | |
b5ec771e PA |
5443 | const lookup_name_info &lookup_name, |
5444 | domain_enum domain) | |
22cee43f PMR |
5445 | { |
5446 | struct using_direct *renaming; | |
5447 | int defns_mark = num_defns_collected (obstackp); | |
5448 | ||
b5ec771e PA |
5449 | symbol_name_matcher_ftype *name_match |
5450 | = ada_get_symbol_name_matcher (lookup_name); | |
5451 | ||
22cee43f PMR |
5452 | for (renaming = block_using (block); |
5453 | renaming != NULL; | |
5454 | renaming = renaming->next) | |
5455 | { | |
5456 | const char *r_name; | |
22cee43f PMR |
5457 | |
5458 | /* Avoid infinite recursions: skip this renaming if we are actually | |
5459 | already traversing it. | |
5460 | ||
5461 | Currently, symbol lookup in Ada don't use the namespace machinery from | |
5462 | C++/Fortran support: skip namespace imports that use them. */ | |
5463 | if (renaming->searched | |
5464 | || (renaming->import_src != NULL | |
5465 | && renaming->import_src[0] != '\0') | |
5466 | || (renaming->import_dest != NULL | |
5467 | && renaming->import_dest[0] != '\0')) | |
5468 | continue; | |
5469 | renaming->searched = 1; | |
5470 | ||
5471 | /* TODO: here, we perform another name-based symbol lookup, which can | |
5472 | pull its own multiple overloads. In theory, we should be able to do | |
5473 | better in this case since, in DWARF, DW_AT_import is a DIE reference, | |
5474 | not a simple name. But in order to do this, we would need to enhance | |
5475 | the DWARF reader to associate a symbol to this renaming, instead of a | |
5476 | name. So, for now, we do something simpler: re-use the C++/Fortran | |
5477 | namespace machinery. */ | |
5478 | r_name = (renaming->alias != NULL | |
5479 | ? renaming->alias | |
5480 | : renaming->declaration); | |
b5ec771e PA |
5481 | if (name_match (r_name, lookup_name, NULL)) |
5482 | { | |
5483 | lookup_name_info decl_lookup_name (renaming->declaration, | |
5484 | lookup_name.match_type ()); | |
5485 | ada_add_all_symbols (obstackp, block, decl_lookup_name, domain, | |
5486 | 1, NULL); | |
5487 | } | |
22cee43f PMR |
5488 | renaming->searched = 0; |
5489 | } | |
5490 | return num_defns_collected (obstackp) != defns_mark; | |
5491 | } | |
5492 | ||
db230ce3 JB |
5493 | /* Implements compare_names, but only applying the comparision using |
5494 | the given CASING. */ | |
5b4ee69b | 5495 | |
40658b94 | 5496 | static int |
db230ce3 JB |
5497 | compare_names_with_case (const char *string1, const char *string2, |
5498 | enum case_sensitivity casing) | |
40658b94 PH |
5499 | { |
5500 | while (*string1 != '\0' && *string2 != '\0') | |
5501 | { | |
db230ce3 JB |
5502 | char c1, c2; |
5503 | ||
40658b94 PH |
5504 | if (isspace (*string1) || isspace (*string2)) |
5505 | return strcmp_iw_ordered (string1, string2); | |
db230ce3 JB |
5506 | |
5507 | if (casing == case_sensitive_off) | |
5508 | { | |
5509 | c1 = tolower (*string1); | |
5510 | c2 = tolower (*string2); | |
5511 | } | |
5512 | else | |
5513 | { | |
5514 | c1 = *string1; | |
5515 | c2 = *string2; | |
5516 | } | |
5517 | if (c1 != c2) | |
40658b94 | 5518 | break; |
db230ce3 | 5519 | |
40658b94 PH |
5520 | string1 += 1; |
5521 | string2 += 1; | |
5522 | } | |
db230ce3 | 5523 | |
40658b94 PH |
5524 | switch (*string1) |
5525 | { | |
5526 | case '(': | |
5527 | return strcmp_iw_ordered (string1, string2); | |
5528 | case '_': | |
5529 | if (*string2 == '\0') | |
5530 | { | |
052874e8 | 5531 | if (is_name_suffix (string1)) |
40658b94 PH |
5532 | return 0; |
5533 | else | |
1a1d5513 | 5534 | return 1; |
40658b94 | 5535 | } |
dbb8534f | 5536 | /* FALLTHROUGH */ |
40658b94 PH |
5537 | default: |
5538 | if (*string2 == '(') | |
5539 | return strcmp_iw_ordered (string1, string2); | |
5540 | else | |
db230ce3 JB |
5541 | { |
5542 | if (casing == case_sensitive_off) | |
5543 | return tolower (*string1) - tolower (*string2); | |
5544 | else | |
5545 | return *string1 - *string2; | |
5546 | } | |
40658b94 | 5547 | } |
ccefe4c4 TT |
5548 | } |
5549 | ||
db230ce3 JB |
5550 | /* Compare STRING1 to STRING2, with results as for strcmp. |
5551 | Compatible with strcmp_iw_ordered in that... | |
5552 | ||
5553 | strcmp_iw_ordered (STRING1, STRING2) <= 0 | |
5554 | ||
5555 | ... implies... | |
5556 | ||
5557 | compare_names (STRING1, STRING2) <= 0 | |
5558 | ||
5559 | (they may differ as to what symbols compare equal). */ | |
5560 | ||
5561 | static int | |
5562 | compare_names (const char *string1, const char *string2) | |
5563 | { | |
5564 | int result; | |
5565 | ||
5566 | /* Similar to what strcmp_iw_ordered does, we need to perform | |
5567 | a case-insensitive comparison first, and only resort to | |
5568 | a second, case-sensitive, comparison if the first one was | |
5569 | not sufficient to differentiate the two strings. */ | |
5570 | ||
5571 | result = compare_names_with_case (string1, string2, case_sensitive_off); | |
5572 | if (result == 0) | |
5573 | result = compare_names_with_case (string1, string2, case_sensitive_on); | |
5574 | ||
5575 | return result; | |
5576 | } | |
5577 | ||
b5ec771e PA |
5578 | /* Convenience function to get at the Ada encoded lookup name for |
5579 | LOOKUP_NAME, as a C string. */ | |
5580 | ||
5581 | static const char * | |
5582 | ada_lookup_name (const lookup_name_info &lookup_name) | |
5583 | { | |
5584 | return lookup_name.ada ().lookup_name ().c_str (); | |
5585 | } | |
5586 | ||
339c13b6 | 5587 | /* Add to OBSTACKP all non-local symbols whose name and domain match |
b5ec771e PA |
5588 | LOOKUP_NAME and DOMAIN respectively. The search is performed on |
5589 | GLOBAL_BLOCK symbols if GLOBAL is non-zero, or on STATIC_BLOCK | |
5590 | symbols otherwise. */ | |
339c13b6 JB |
5591 | |
5592 | static void | |
b5ec771e PA |
5593 | add_nonlocal_symbols (struct obstack *obstackp, |
5594 | const lookup_name_info &lookup_name, | |
5595 | domain_enum domain, int global) | |
339c13b6 | 5596 | { |
40658b94 | 5597 | struct match_data data; |
339c13b6 | 5598 | |
6475f2fe | 5599 | memset (&data, 0, sizeof data); |
ccefe4c4 | 5600 | data.obstackp = obstackp; |
339c13b6 | 5601 | |
b5ec771e PA |
5602 | bool is_wild_match = lookup_name.ada ().wild_match_p (); |
5603 | ||
199b4314 TT |
5604 | auto callback = [&] (struct block_symbol *bsym) |
5605 | { | |
5606 | return aux_add_nonlocal_symbols (bsym, &data); | |
5607 | }; | |
5608 | ||
2030c079 | 5609 | for (objfile *objfile : current_program_space->objfiles ()) |
40658b94 PH |
5610 | { |
5611 | data.objfile = objfile; | |
5612 | ||
b054970d TT |
5613 | objfile->sf->qf->map_matching_symbols (objfile, lookup_name, |
5614 | domain, global, callback, | |
5615 | (is_wild_match | |
5616 | ? NULL : compare_names)); | |
22cee43f | 5617 | |
b669c953 | 5618 | for (compunit_symtab *cu : objfile->compunits ()) |
22cee43f PMR |
5619 | { |
5620 | const struct block *global_block | |
5621 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cu), GLOBAL_BLOCK); | |
5622 | ||
b5ec771e PA |
5623 | if (ada_add_block_renamings (obstackp, global_block, lookup_name, |
5624 | domain)) | |
22cee43f PMR |
5625 | data.found_sym = 1; |
5626 | } | |
40658b94 PH |
5627 | } |
5628 | ||
5629 | if (num_defns_collected (obstackp) == 0 && global && !is_wild_match) | |
5630 | { | |
b5ec771e | 5631 | const char *name = ada_lookup_name (lookup_name); |
e0802d59 TT |
5632 | std::string bracket_name = std::string ("<_ada_") + name + '>'; |
5633 | lookup_name_info name1 (bracket_name, symbol_name_match_type::FULL); | |
b5ec771e | 5634 | |
2030c079 | 5635 | for (objfile *objfile : current_program_space->objfiles ()) |
dda83cd7 | 5636 | { |
40658b94 | 5637 | data.objfile = objfile; |
b054970d | 5638 | objfile->sf->qf->map_matching_symbols (objfile, name1, |
199b4314 | 5639 | domain, global, callback, |
b5ec771e | 5640 | compare_names); |
40658b94 PH |
5641 | } |
5642 | } | |
339c13b6 JB |
5643 | } |
5644 | ||
b5ec771e PA |
5645 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if |
5646 | FULL_SEARCH is non-zero, enclosing scope and in global scopes, | |
5647 | returning the number of matches. Add these to OBSTACKP. | |
4eeaa230 | 5648 | |
22cee43f PMR |
5649 | When FULL_SEARCH is non-zero, any non-function/non-enumeral |
5650 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
4c4b4cd2 | 5651 | is the one match returned (no other matches in that or |
d9680e73 | 5652 | enclosing blocks is returned). If there are any matches in or |
22cee43f | 5653 | surrounding BLOCK, then these alone are returned. |
4eeaa230 | 5654 | |
b5ec771e PA |
5655 | Names prefixed with "standard__" are handled specially: |
5656 | "standard__" is first stripped off (by the lookup_name | |
5657 | constructor), and only static and global symbols are searched. | |
14f9c5c9 | 5658 | |
22cee43f PMR |
5659 | If MADE_GLOBAL_LOOKUP_P is non-null, set it before return to whether we had |
5660 | to lookup global symbols. */ | |
5661 | ||
5662 | static void | |
5663 | ada_add_all_symbols (struct obstack *obstackp, | |
5664 | const struct block *block, | |
b5ec771e | 5665 | const lookup_name_info &lookup_name, |
22cee43f PMR |
5666 | domain_enum domain, |
5667 | int full_search, | |
5668 | int *made_global_lookup_p) | |
14f9c5c9 AS |
5669 | { |
5670 | struct symbol *sym; | |
14f9c5c9 | 5671 | |
22cee43f PMR |
5672 | if (made_global_lookup_p) |
5673 | *made_global_lookup_p = 0; | |
339c13b6 JB |
5674 | |
5675 | /* Special case: If the user specifies a symbol name inside package | |
5676 | Standard, do a non-wild matching of the symbol name without | |
5677 | the "standard__" prefix. This was primarily introduced in order | |
5678 | to allow the user to specifically access the standard exceptions | |
5679 | using, for instance, Standard.Constraint_Error when Constraint_Error | |
5680 | is ambiguous (due to the user defining its own Constraint_Error | |
5681 | entity inside its program). */ | |
b5ec771e PA |
5682 | if (lookup_name.ada ().standard_p ()) |
5683 | block = NULL; | |
4c4b4cd2 | 5684 | |
339c13b6 | 5685 | /* Check the non-global symbols. If we have ANY match, then we're done. */ |
14f9c5c9 | 5686 | |
4eeaa230 DE |
5687 | if (block != NULL) |
5688 | { | |
5689 | if (full_search) | |
b5ec771e | 5690 | ada_add_local_symbols (obstackp, lookup_name, block, domain); |
4eeaa230 DE |
5691 | else |
5692 | { | |
5693 | /* In the !full_search case we're are being called by | |
4009ee92 | 5694 | iterate_over_symbols, and we don't want to search |
4eeaa230 | 5695 | superblocks. */ |
b5ec771e | 5696 | ada_add_block_symbols (obstackp, block, lookup_name, domain, NULL); |
4eeaa230 | 5697 | } |
22cee43f PMR |
5698 | if (num_defns_collected (obstackp) > 0 || !full_search) |
5699 | return; | |
4eeaa230 | 5700 | } |
d2e4a39e | 5701 | |
339c13b6 JB |
5702 | /* No non-global symbols found. Check our cache to see if we have |
5703 | already performed this search before. If we have, then return | |
5704 | the same result. */ | |
5705 | ||
b5ec771e PA |
5706 | if (lookup_cached_symbol (ada_lookup_name (lookup_name), |
5707 | domain, &sym, &block)) | |
4c4b4cd2 PH |
5708 | { |
5709 | if (sym != NULL) | |
b5ec771e | 5710 | add_defn_to_vec (obstackp, sym, block); |
22cee43f | 5711 | return; |
4c4b4cd2 | 5712 | } |
14f9c5c9 | 5713 | |
22cee43f PMR |
5714 | if (made_global_lookup_p) |
5715 | *made_global_lookup_p = 1; | |
b1eedac9 | 5716 | |
339c13b6 JB |
5717 | /* Search symbols from all global blocks. */ |
5718 | ||
b5ec771e | 5719 | add_nonlocal_symbols (obstackp, lookup_name, domain, 1); |
d2e4a39e | 5720 | |
4c4b4cd2 | 5721 | /* Now add symbols from all per-file blocks if we've gotten no hits |
339c13b6 | 5722 | (not strictly correct, but perhaps better than an error). */ |
d2e4a39e | 5723 | |
22cee43f | 5724 | if (num_defns_collected (obstackp) == 0) |
b5ec771e | 5725 | add_nonlocal_symbols (obstackp, lookup_name, domain, 0); |
22cee43f PMR |
5726 | } |
5727 | ||
b5ec771e PA |
5728 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if FULL_SEARCH |
5729 | is non-zero, enclosing scope and in global scopes, returning the number of | |
22cee43f | 5730 | matches. |
54d343a2 TT |
5731 | Fills *RESULTS with (SYM,BLOCK) tuples, indicating the symbols |
5732 | found and the blocks and symbol tables (if any) in which they were | |
5733 | found. | |
22cee43f PMR |
5734 | |
5735 | When full_search is non-zero, any non-function/non-enumeral | |
5736 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
5737 | is the one match returned (no other matches in that or | |
5738 | enclosing blocks is returned). If there are any matches in or | |
5739 | surrounding BLOCK, then these alone are returned. | |
5740 | ||
5741 | Names prefixed with "standard__" are handled specially: "standard__" | |
5742 | is first stripped off, and only static and global symbols are searched. */ | |
5743 | ||
5744 | static int | |
b5ec771e PA |
5745 | ada_lookup_symbol_list_worker (const lookup_name_info &lookup_name, |
5746 | const struct block *block, | |
22cee43f | 5747 | domain_enum domain, |
54d343a2 | 5748 | std::vector<struct block_symbol> *results, |
22cee43f PMR |
5749 | int full_search) |
5750 | { | |
22cee43f PMR |
5751 | int syms_from_global_search; |
5752 | int ndefns; | |
ec6a20c2 | 5753 | auto_obstack obstack; |
22cee43f | 5754 | |
ec6a20c2 | 5755 | ada_add_all_symbols (&obstack, block, lookup_name, |
b5ec771e | 5756 | domain, full_search, &syms_from_global_search); |
14f9c5c9 | 5757 | |
ec6a20c2 JB |
5758 | ndefns = num_defns_collected (&obstack); |
5759 | ||
54d343a2 TT |
5760 | struct block_symbol *base = defns_collected (&obstack, 1); |
5761 | for (int i = 0; i < ndefns; ++i) | |
5762 | results->push_back (base[i]); | |
4c4b4cd2 | 5763 | |
54d343a2 | 5764 | ndefns = remove_extra_symbols (results); |
4c4b4cd2 | 5765 | |
b1eedac9 | 5766 | if (ndefns == 0 && full_search && syms_from_global_search) |
b5ec771e | 5767 | cache_symbol (ada_lookup_name (lookup_name), domain, NULL, NULL); |
14f9c5c9 | 5768 | |
b1eedac9 | 5769 | if (ndefns == 1 && full_search && syms_from_global_search) |
b5ec771e PA |
5770 | cache_symbol (ada_lookup_name (lookup_name), domain, |
5771 | (*results)[0].symbol, (*results)[0].block); | |
14f9c5c9 | 5772 | |
54d343a2 | 5773 | ndefns = remove_irrelevant_renamings (results, block); |
ec6a20c2 | 5774 | |
14f9c5c9 AS |
5775 | return ndefns; |
5776 | } | |
5777 | ||
b5ec771e | 5778 | /* Find symbols in DOMAIN matching NAME, in BLOCK and enclosing scope and |
54d343a2 TT |
5779 | in global scopes, returning the number of matches, and filling *RESULTS |
5780 | with (SYM,BLOCK) tuples. | |
ec6a20c2 | 5781 | |
4eeaa230 DE |
5782 | See ada_lookup_symbol_list_worker for further details. */ |
5783 | ||
5784 | int | |
b5ec771e | 5785 | ada_lookup_symbol_list (const char *name, const struct block *block, |
54d343a2 TT |
5786 | domain_enum domain, |
5787 | std::vector<struct block_symbol> *results) | |
4eeaa230 | 5788 | { |
b5ec771e PA |
5789 | symbol_name_match_type name_match_type = name_match_type_from_name (name); |
5790 | lookup_name_info lookup_name (name, name_match_type); | |
5791 | ||
5792 | return ada_lookup_symbol_list_worker (lookup_name, block, domain, results, 1); | |
4eeaa230 DE |
5793 | } |
5794 | ||
4e5c77fe JB |
5795 | /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set |
5796 | to 1, but choosing the first symbol found if there are multiple | |
5797 | choices. | |
5798 | ||
5e2336be JB |
5799 | The result is stored in *INFO, which must be non-NULL. |
5800 | If no match is found, INFO->SYM is set to NULL. */ | |
4e5c77fe JB |
5801 | |
5802 | void | |
5803 | ada_lookup_encoded_symbol (const char *name, const struct block *block, | |
fe978cb0 | 5804 | domain_enum domain, |
d12307c1 | 5805 | struct block_symbol *info) |
14f9c5c9 | 5806 | { |
b5ec771e PA |
5807 | /* Since we already have an encoded name, wrap it in '<>' to force a |
5808 | verbatim match. Otherwise, if the name happens to not look like | |
5809 | an encoded name (because it doesn't include a "__"), | |
5810 | ada_lookup_name_info would re-encode/fold it again, and that | |
5811 | would e.g., incorrectly lowercase object renaming names like | |
5812 | "R28b" -> "r28b". */ | |
12932e2c | 5813 | std::string verbatim = add_angle_brackets (name); |
b5ec771e | 5814 | |
5e2336be | 5815 | gdb_assert (info != NULL); |
65392b3e | 5816 | *info = ada_lookup_symbol (verbatim.c_str (), block, domain); |
4e5c77fe | 5817 | } |
aeb5907d JB |
5818 | |
5819 | /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing | |
5820 | scope and in global scopes, or NULL if none. NAME is folded and | |
5821 | encoded first. Otherwise, the result is as for ada_lookup_symbol_list, | |
65392b3e | 5822 | choosing the first symbol if there are multiple choices. */ |
4e5c77fe | 5823 | |
d12307c1 | 5824 | struct block_symbol |
aeb5907d | 5825 | ada_lookup_symbol (const char *name, const struct block *block0, |
dda83cd7 | 5826 | domain_enum domain) |
aeb5907d | 5827 | { |
54d343a2 | 5828 | std::vector<struct block_symbol> candidates; |
f98fc17b | 5829 | int n_candidates; |
f98fc17b PA |
5830 | |
5831 | n_candidates = ada_lookup_symbol_list (name, block0, domain, &candidates); | |
f98fc17b PA |
5832 | |
5833 | if (n_candidates == 0) | |
54d343a2 | 5834 | return {}; |
f98fc17b PA |
5835 | |
5836 | block_symbol info = candidates[0]; | |
5837 | info.symbol = fixup_symbol_section (info.symbol, NULL); | |
d12307c1 | 5838 | return info; |
4c4b4cd2 | 5839 | } |
14f9c5c9 | 5840 | |
14f9c5c9 | 5841 | |
4c4b4cd2 PH |
5842 | /* True iff STR is a possible encoded suffix of a normal Ada name |
5843 | that is to be ignored for matching purposes. Suffixes of parallel | |
5844 | names (e.g., XVE) are not included here. Currently, the possible suffixes | |
5823c3ef | 5845 | are given by any of the regular expressions: |
4c4b4cd2 | 5846 | |
babe1480 JB |
5847 | [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux] |
5848 | ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX] | |
9ac7f98e | 5849 | TKB [subprogram suffix for task bodies] |
babe1480 | 5850 | _E[0-9]+[bs]$ [protected object entry suffixes] |
61ee279c | 5851 | (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$ |
babe1480 JB |
5852 | |
5853 | Also, any leading "__[0-9]+" sequence is skipped before the suffix | |
5854 | match is performed. This sequence is used to differentiate homonyms, | |
5855 | is an optional part of a valid name suffix. */ | |
4c4b4cd2 | 5856 | |
14f9c5c9 | 5857 | static int |
d2e4a39e | 5858 | is_name_suffix (const char *str) |
14f9c5c9 AS |
5859 | { |
5860 | int k; | |
4c4b4cd2 PH |
5861 | const char *matching; |
5862 | const int len = strlen (str); | |
5863 | ||
babe1480 JB |
5864 | /* Skip optional leading __[0-9]+. */ |
5865 | ||
4c4b4cd2 PH |
5866 | if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2])) |
5867 | { | |
babe1480 JB |
5868 | str += 3; |
5869 | while (isdigit (str[0])) | |
dda83cd7 | 5870 | str += 1; |
4c4b4cd2 | 5871 | } |
babe1480 JB |
5872 | |
5873 | /* [.$][0-9]+ */ | |
4c4b4cd2 | 5874 | |
babe1480 | 5875 | if (str[0] == '.' || str[0] == '$') |
4c4b4cd2 | 5876 | { |
babe1480 | 5877 | matching = str + 1; |
4c4b4cd2 | 5878 | while (isdigit (matching[0])) |
dda83cd7 | 5879 | matching += 1; |
4c4b4cd2 | 5880 | if (matching[0] == '\0') |
dda83cd7 | 5881 | return 1; |
4c4b4cd2 PH |
5882 | } |
5883 | ||
5884 | /* ___[0-9]+ */ | |
babe1480 | 5885 | |
4c4b4cd2 PH |
5886 | if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_') |
5887 | { | |
5888 | matching = str + 3; | |
5889 | while (isdigit (matching[0])) | |
dda83cd7 | 5890 | matching += 1; |
4c4b4cd2 | 5891 | if (matching[0] == '\0') |
dda83cd7 | 5892 | return 1; |
4c4b4cd2 PH |
5893 | } |
5894 | ||
9ac7f98e JB |
5895 | /* "TKB" suffixes are used for subprograms implementing task bodies. */ |
5896 | ||
5897 | if (strcmp (str, "TKB") == 0) | |
5898 | return 1; | |
5899 | ||
529cad9c PH |
5900 | #if 0 |
5901 | /* FIXME: brobecker/2005-09-23: Protected Object subprograms end | |
0963b4bd MS |
5902 | with a N at the end. Unfortunately, the compiler uses the same |
5903 | convention for other internal types it creates. So treating | |
529cad9c | 5904 | all entity names that end with an "N" as a name suffix causes |
0963b4bd MS |
5905 | some regressions. For instance, consider the case of an enumerated |
5906 | type. To support the 'Image attribute, it creates an array whose | |
529cad9c PH |
5907 | name ends with N. |
5908 | Having a single character like this as a suffix carrying some | |
0963b4bd | 5909 | information is a bit risky. Perhaps we should change the encoding |
529cad9c PH |
5910 | to be something like "_N" instead. In the meantime, do not do |
5911 | the following check. */ | |
5912 | /* Protected Object Subprograms */ | |
5913 | if (len == 1 && str [0] == 'N') | |
5914 | return 1; | |
5915 | #endif | |
5916 | ||
5917 | /* _E[0-9]+[bs]$ */ | |
5918 | if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2])) | |
5919 | { | |
5920 | matching = str + 3; | |
5921 | while (isdigit (matching[0])) | |
dda83cd7 | 5922 | matching += 1; |
529cad9c | 5923 | if ((matching[0] == 'b' || matching[0] == 's') |
dda83cd7 SM |
5924 | && matching [1] == '\0') |
5925 | return 1; | |
529cad9c PH |
5926 | } |
5927 | ||
4c4b4cd2 PH |
5928 | /* ??? We should not modify STR directly, as we are doing below. This |
5929 | is fine in this case, but may become problematic later if we find | |
5930 | that this alternative did not work, and want to try matching | |
5931 | another one from the begining of STR. Since we modified it, we | |
5932 | won't be able to find the begining of the string anymore! */ | |
14f9c5c9 AS |
5933 | if (str[0] == 'X') |
5934 | { | |
5935 | str += 1; | |
d2e4a39e | 5936 | while (str[0] != '_' && str[0] != '\0') |
dda83cd7 SM |
5937 | { |
5938 | if (str[0] != 'n' && str[0] != 'b') | |
5939 | return 0; | |
5940 | str += 1; | |
5941 | } | |
14f9c5c9 | 5942 | } |
babe1480 | 5943 | |
14f9c5c9 AS |
5944 | if (str[0] == '\000') |
5945 | return 1; | |
babe1480 | 5946 | |
d2e4a39e | 5947 | if (str[0] == '_') |
14f9c5c9 AS |
5948 | { |
5949 | if (str[1] != '_' || str[2] == '\000') | |
dda83cd7 | 5950 | return 0; |
d2e4a39e | 5951 | if (str[2] == '_') |
dda83cd7 SM |
5952 | { |
5953 | if (strcmp (str + 3, "JM") == 0) | |
5954 | return 1; | |
5955 | /* FIXME: brobecker/2004-09-30: GNAT will soon stop using | |
5956 | the LJM suffix in favor of the JM one. But we will | |
5957 | still accept LJM as a valid suffix for a reasonable | |
5958 | amount of time, just to allow ourselves to debug programs | |
5959 | compiled using an older version of GNAT. */ | |
5960 | if (strcmp (str + 3, "LJM") == 0) | |
5961 | return 1; | |
5962 | if (str[3] != 'X') | |
5963 | return 0; | |
5964 | if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B' | |
5965 | || str[4] == 'U' || str[4] == 'P') | |
5966 | return 1; | |
5967 | if (str[4] == 'R' && str[5] != 'T') | |
5968 | return 1; | |
5969 | return 0; | |
5970 | } | |
4c4b4cd2 | 5971 | if (!isdigit (str[2])) |
dda83cd7 | 5972 | return 0; |
4c4b4cd2 | 5973 | for (k = 3; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5974 | if (!isdigit (str[k]) && str[k] != '_') |
5975 | return 0; | |
14f9c5c9 AS |
5976 | return 1; |
5977 | } | |
4c4b4cd2 | 5978 | if (str[0] == '$' && isdigit (str[1])) |
14f9c5c9 | 5979 | { |
4c4b4cd2 | 5980 | for (k = 2; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5981 | if (!isdigit (str[k]) && str[k] != '_') |
5982 | return 0; | |
14f9c5c9 AS |
5983 | return 1; |
5984 | } | |
5985 | return 0; | |
5986 | } | |
d2e4a39e | 5987 | |
aeb5907d JB |
5988 | /* Return non-zero if the string starting at NAME and ending before |
5989 | NAME_END contains no capital letters. */ | |
529cad9c PH |
5990 | |
5991 | static int | |
5992 | is_valid_name_for_wild_match (const char *name0) | |
5993 | { | |
f945dedf | 5994 | std::string decoded_name = ada_decode (name0); |
529cad9c PH |
5995 | int i; |
5996 | ||
5823c3ef JB |
5997 | /* If the decoded name starts with an angle bracket, it means that |
5998 | NAME0 does not follow the GNAT encoding format. It should then | |
5999 | not be allowed as a possible wild match. */ | |
6000 | if (decoded_name[0] == '<') | |
6001 | return 0; | |
6002 | ||
529cad9c PH |
6003 | for (i=0; decoded_name[i] != '\0'; i++) |
6004 | if (isalpha (decoded_name[i]) && !islower (decoded_name[i])) | |
6005 | return 0; | |
6006 | ||
6007 | return 1; | |
6008 | } | |
6009 | ||
59c8a30b JB |
6010 | /* Advance *NAMEP to next occurrence in the string NAME0 of the TARGET0 |
6011 | character which could start a simple name. Assumes that *NAMEP points | |
6012 | somewhere inside the string beginning at NAME0. */ | |
4c4b4cd2 | 6013 | |
14f9c5c9 | 6014 | static int |
59c8a30b | 6015 | advance_wild_match (const char **namep, const char *name0, char target0) |
14f9c5c9 | 6016 | { |
73589123 | 6017 | const char *name = *namep; |
5b4ee69b | 6018 | |
5823c3ef | 6019 | while (1) |
14f9c5c9 | 6020 | { |
59c8a30b | 6021 | char t0, t1; |
73589123 PH |
6022 | |
6023 | t0 = *name; | |
6024 | if (t0 == '_') | |
6025 | { | |
6026 | t1 = name[1]; | |
6027 | if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9')) | |
6028 | { | |
6029 | name += 1; | |
61012eef | 6030 | if (name == name0 + 5 && startswith (name0, "_ada")) |
73589123 PH |
6031 | break; |
6032 | else | |
6033 | name += 1; | |
6034 | } | |
aa27d0b3 JB |
6035 | else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z') |
6036 | || name[2] == target0)) | |
73589123 PH |
6037 | { |
6038 | name += 2; | |
6039 | break; | |
6040 | } | |
86b44259 TT |
6041 | else if (t1 == '_' && name[2] == 'B' && name[3] == '_') |
6042 | { | |
6043 | /* Names like "pkg__B_N__name", where N is a number, are | |
6044 | block-local. We can handle these by simply skipping | |
6045 | the "B_" here. */ | |
6046 | name += 4; | |
6047 | } | |
73589123 PH |
6048 | else |
6049 | return 0; | |
6050 | } | |
6051 | else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9')) | |
6052 | name += 1; | |
6053 | else | |
5823c3ef | 6054 | return 0; |
73589123 PH |
6055 | } |
6056 | ||
6057 | *namep = name; | |
6058 | return 1; | |
6059 | } | |
6060 | ||
b5ec771e PA |
6061 | /* Return true iff NAME encodes a name of the form prefix.PATN. |
6062 | Ignores any informational suffixes of NAME (i.e., for which | |
6063 | is_name_suffix is true). Assumes that PATN is a lower-cased Ada | |
6064 | simple name. */ | |
73589123 | 6065 | |
b5ec771e | 6066 | static bool |
73589123 PH |
6067 | wild_match (const char *name, const char *patn) |
6068 | { | |
22e048c9 | 6069 | const char *p; |
73589123 PH |
6070 | const char *name0 = name; |
6071 | ||
6072 | while (1) | |
6073 | { | |
6074 | const char *match = name; | |
6075 | ||
6076 | if (*name == *patn) | |
6077 | { | |
6078 | for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1) | |
6079 | if (*p != *name) | |
6080 | break; | |
6081 | if (*p == '\0' && is_name_suffix (name)) | |
b5ec771e | 6082 | return match == name0 || is_valid_name_for_wild_match (name0); |
73589123 PH |
6083 | |
6084 | if (name[-1] == '_') | |
6085 | name -= 1; | |
6086 | } | |
6087 | if (!advance_wild_match (&name, name0, *patn)) | |
b5ec771e | 6088 | return false; |
96d887e8 | 6089 | } |
96d887e8 PH |
6090 | } |
6091 | ||
b5ec771e PA |
6092 | /* Add symbols from BLOCK matching LOOKUP_NAME in DOMAIN to vector |
6093 | *defn_symbols, updating the list of symbols in OBSTACKP (if | |
6094 | necessary). OBJFILE is the section containing BLOCK. */ | |
96d887e8 PH |
6095 | |
6096 | static void | |
6097 | ada_add_block_symbols (struct obstack *obstackp, | |
b5ec771e PA |
6098 | const struct block *block, |
6099 | const lookup_name_info &lookup_name, | |
6100 | domain_enum domain, struct objfile *objfile) | |
96d887e8 | 6101 | { |
8157b174 | 6102 | struct block_iterator iter; |
96d887e8 PH |
6103 | /* A matching argument symbol, if any. */ |
6104 | struct symbol *arg_sym; | |
6105 | /* Set true when we find a matching non-argument symbol. */ | |
6106 | int found_sym; | |
6107 | struct symbol *sym; | |
6108 | ||
6109 | arg_sym = NULL; | |
6110 | found_sym = 0; | |
b5ec771e PA |
6111 | for (sym = block_iter_match_first (block, lookup_name, &iter); |
6112 | sym != NULL; | |
6113 | sym = block_iter_match_next (lookup_name, &iter)) | |
96d887e8 | 6114 | { |
c1b5c1eb | 6115 | if (symbol_matches_domain (sym->language (), SYMBOL_DOMAIN (sym), domain)) |
b5ec771e PA |
6116 | { |
6117 | if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED) | |
6118 | { | |
6119 | if (SYMBOL_IS_ARGUMENT (sym)) | |
6120 | arg_sym = sym; | |
6121 | else | |
6122 | { | |
6123 | found_sym = 1; | |
6124 | add_defn_to_vec (obstackp, | |
6125 | fixup_symbol_section (sym, objfile), | |
6126 | block); | |
6127 | } | |
6128 | } | |
6129 | } | |
96d887e8 PH |
6130 | } |
6131 | ||
22cee43f PMR |
6132 | /* Handle renamings. */ |
6133 | ||
b5ec771e | 6134 | if (ada_add_block_renamings (obstackp, block, lookup_name, domain)) |
22cee43f PMR |
6135 | found_sym = 1; |
6136 | ||
96d887e8 PH |
6137 | if (!found_sym && arg_sym != NULL) |
6138 | { | |
76a01679 | 6139 | add_defn_to_vec (obstackp, |
dda83cd7 SM |
6140 | fixup_symbol_section (arg_sym, objfile), |
6141 | block); | |
96d887e8 PH |
6142 | } |
6143 | ||
b5ec771e | 6144 | if (!lookup_name.ada ().wild_match_p ()) |
96d887e8 PH |
6145 | { |
6146 | arg_sym = NULL; | |
6147 | found_sym = 0; | |
b5ec771e PA |
6148 | const std::string &ada_lookup_name = lookup_name.ada ().lookup_name (); |
6149 | const char *name = ada_lookup_name.c_str (); | |
6150 | size_t name_len = ada_lookup_name.size (); | |
96d887e8 PH |
6151 | |
6152 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
76a01679 | 6153 | { |
dda83cd7 SM |
6154 | if (symbol_matches_domain (sym->language (), |
6155 | SYMBOL_DOMAIN (sym), domain)) | |
6156 | { | |
6157 | int cmp; | |
6158 | ||
6159 | cmp = (int) '_' - (int) sym->linkage_name ()[0]; | |
6160 | if (cmp == 0) | |
6161 | { | |
6162 | cmp = !startswith (sym->linkage_name (), "_ada_"); | |
6163 | if (cmp == 0) | |
6164 | cmp = strncmp (name, sym->linkage_name () + 5, | |
6165 | name_len); | |
6166 | } | |
6167 | ||
6168 | if (cmp == 0 | |
6169 | && is_name_suffix (sym->linkage_name () + name_len + 5)) | |
6170 | { | |
2a2d4dc3 AS |
6171 | if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED) |
6172 | { | |
6173 | if (SYMBOL_IS_ARGUMENT (sym)) | |
6174 | arg_sym = sym; | |
6175 | else | |
6176 | { | |
6177 | found_sym = 1; | |
6178 | add_defn_to_vec (obstackp, | |
6179 | fixup_symbol_section (sym, objfile), | |
6180 | block); | |
6181 | } | |
6182 | } | |
dda83cd7 SM |
6183 | } |
6184 | } | |
76a01679 | 6185 | } |
96d887e8 PH |
6186 | |
6187 | /* NOTE: This really shouldn't be needed for _ada_ symbols. | |
dda83cd7 | 6188 | They aren't parameters, right? */ |
96d887e8 | 6189 | if (!found_sym && arg_sym != NULL) |
dda83cd7 SM |
6190 | { |
6191 | add_defn_to_vec (obstackp, | |
6192 | fixup_symbol_section (arg_sym, objfile), | |
6193 | block); | |
6194 | } | |
96d887e8 PH |
6195 | } |
6196 | } | |
6197 | \f | |
41d27058 | 6198 | |
dda83cd7 | 6199 | /* Symbol Completion */ |
41d27058 | 6200 | |
b5ec771e | 6201 | /* See symtab.h. */ |
41d27058 | 6202 | |
b5ec771e PA |
6203 | bool |
6204 | ada_lookup_name_info::matches | |
6205 | (const char *sym_name, | |
6206 | symbol_name_match_type match_type, | |
a207cff2 | 6207 | completion_match_result *comp_match_res) const |
41d27058 | 6208 | { |
b5ec771e PA |
6209 | bool match = false; |
6210 | const char *text = m_encoded_name.c_str (); | |
6211 | size_t text_len = m_encoded_name.size (); | |
41d27058 JB |
6212 | |
6213 | /* First, test against the fully qualified name of the symbol. */ | |
6214 | ||
6215 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6216 | match = true; |
41d27058 | 6217 | |
f945dedf | 6218 | std::string decoded_name = ada_decode (sym_name); |
b5ec771e | 6219 | if (match && !m_encoded_p) |
41d27058 JB |
6220 | { |
6221 | /* One needed check before declaring a positive match is to verify | |
dda83cd7 SM |
6222 | that iff we are doing a verbatim match, the decoded version |
6223 | of the symbol name starts with '<'. Otherwise, this symbol name | |
6224 | is not a suitable completion. */ | |
41d27058 | 6225 | |
f945dedf | 6226 | bool has_angle_bracket = (decoded_name[0] == '<'); |
b5ec771e | 6227 | match = (has_angle_bracket == m_verbatim_p); |
41d27058 JB |
6228 | } |
6229 | ||
b5ec771e | 6230 | if (match && !m_verbatim_p) |
41d27058 JB |
6231 | { |
6232 | /* When doing non-verbatim match, another check that needs to | |
dda83cd7 SM |
6233 | be done is to verify that the potentially matching symbol name |
6234 | does not include capital letters, because the ada-mode would | |
6235 | not be able to understand these symbol names without the | |
6236 | angle bracket notation. */ | |
41d27058 JB |
6237 | const char *tmp; |
6238 | ||
6239 | for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++); | |
6240 | if (*tmp != '\0') | |
b5ec771e | 6241 | match = false; |
41d27058 JB |
6242 | } |
6243 | ||
6244 | /* Second: Try wild matching... */ | |
6245 | ||
b5ec771e | 6246 | if (!match && m_wild_match_p) |
41d27058 JB |
6247 | { |
6248 | /* Since we are doing wild matching, this means that TEXT | |
dda83cd7 SM |
6249 | may represent an unqualified symbol name. We therefore must |
6250 | also compare TEXT against the unqualified name of the symbol. */ | |
f945dedf | 6251 | sym_name = ada_unqualified_name (decoded_name.c_str ()); |
41d27058 JB |
6252 | |
6253 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6254 | match = true; |
41d27058 JB |
6255 | } |
6256 | ||
b5ec771e | 6257 | /* Finally: If we found a match, prepare the result to return. */ |
41d27058 JB |
6258 | |
6259 | if (!match) | |
b5ec771e | 6260 | return false; |
41d27058 | 6261 | |
a207cff2 | 6262 | if (comp_match_res != NULL) |
b5ec771e | 6263 | { |
a207cff2 | 6264 | std::string &match_str = comp_match_res->match.storage (); |
41d27058 | 6265 | |
b5ec771e | 6266 | if (!m_encoded_p) |
a207cff2 | 6267 | match_str = ada_decode (sym_name); |
b5ec771e PA |
6268 | else |
6269 | { | |
6270 | if (m_verbatim_p) | |
6271 | match_str = add_angle_brackets (sym_name); | |
6272 | else | |
6273 | match_str = sym_name; | |
41d27058 | 6274 | |
b5ec771e | 6275 | } |
a207cff2 PA |
6276 | |
6277 | comp_match_res->set_match (match_str.c_str ()); | |
41d27058 JB |
6278 | } |
6279 | ||
b5ec771e | 6280 | return true; |
41d27058 JB |
6281 | } |
6282 | ||
dda83cd7 | 6283 | /* Field Access */ |
96d887e8 | 6284 | |
73fb9985 JB |
6285 | /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used |
6286 | for tagged types. */ | |
6287 | ||
6288 | static int | |
6289 | ada_is_dispatch_table_ptr_type (struct type *type) | |
6290 | { | |
0d5cff50 | 6291 | const char *name; |
73fb9985 | 6292 | |
78134374 | 6293 | if (type->code () != TYPE_CODE_PTR) |
73fb9985 JB |
6294 | return 0; |
6295 | ||
7d93a1e0 | 6296 | name = TYPE_TARGET_TYPE (type)->name (); |
73fb9985 JB |
6297 | if (name == NULL) |
6298 | return 0; | |
6299 | ||
6300 | return (strcmp (name, "ada__tags__dispatch_table") == 0); | |
6301 | } | |
6302 | ||
ac4a2da4 JG |
6303 | /* Return non-zero if TYPE is an interface tag. */ |
6304 | ||
6305 | static int | |
6306 | ada_is_interface_tag (struct type *type) | |
6307 | { | |
7d93a1e0 | 6308 | const char *name = type->name (); |
ac4a2da4 JG |
6309 | |
6310 | if (name == NULL) | |
6311 | return 0; | |
6312 | ||
6313 | return (strcmp (name, "ada__tags__interface_tag") == 0); | |
6314 | } | |
6315 | ||
963a6417 PH |
6316 | /* True if field number FIELD_NUM in struct or union type TYPE is supposed |
6317 | to be invisible to users. */ | |
96d887e8 | 6318 | |
963a6417 PH |
6319 | int |
6320 | ada_is_ignored_field (struct type *type, int field_num) | |
96d887e8 | 6321 | { |
1f704f76 | 6322 | if (field_num < 0 || field_num > type->num_fields ()) |
963a6417 | 6323 | return 1; |
ffde82bf | 6324 | |
73fb9985 JB |
6325 | /* Check the name of that field. */ |
6326 | { | |
6327 | const char *name = TYPE_FIELD_NAME (type, field_num); | |
6328 | ||
6329 | /* Anonymous field names should not be printed. | |
6330 | brobecker/2007-02-20: I don't think this can actually happen | |
30baf67b | 6331 | but we don't want to print the value of anonymous fields anyway. */ |
73fb9985 JB |
6332 | if (name == NULL) |
6333 | return 1; | |
6334 | ||
ffde82bf JB |
6335 | /* Normally, fields whose name start with an underscore ("_") |
6336 | are fields that have been internally generated by the compiler, | |
6337 | and thus should not be printed. The "_parent" field is special, | |
6338 | however: This is a field internally generated by the compiler | |
6339 | for tagged types, and it contains the components inherited from | |
6340 | the parent type. This field should not be printed as is, but | |
6341 | should not be ignored either. */ | |
61012eef | 6342 | if (name[0] == '_' && !startswith (name, "_parent")) |
73fb9985 JB |
6343 | return 1; |
6344 | } | |
6345 | ||
ac4a2da4 JG |
6346 | /* If this is the dispatch table of a tagged type or an interface tag, |
6347 | then ignore. */ | |
73fb9985 | 6348 | if (ada_is_tagged_type (type, 1) |
940da03e SM |
6349 | && (ada_is_dispatch_table_ptr_type (type->field (field_num).type ()) |
6350 | || ada_is_interface_tag (type->field (field_num).type ()))) | |
73fb9985 JB |
6351 | return 1; |
6352 | ||
6353 | /* Not a special field, so it should not be ignored. */ | |
6354 | return 0; | |
963a6417 | 6355 | } |
96d887e8 | 6356 | |
963a6417 | 6357 | /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a |
0963b4bd | 6358 | pointer or reference type whose ultimate target has a tag field. */ |
96d887e8 | 6359 | |
963a6417 PH |
6360 | int |
6361 | ada_is_tagged_type (struct type *type, int refok) | |
6362 | { | |
988f6b3d | 6363 | return (ada_lookup_struct_elt_type (type, "_tag", refok, 1) != NULL); |
963a6417 | 6364 | } |
96d887e8 | 6365 | |
963a6417 | 6366 | /* True iff TYPE represents the type of X'Tag */ |
96d887e8 | 6367 | |
963a6417 PH |
6368 | int |
6369 | ada_is_tag_type (struct type *type) | |
6370 | { | |
460efde1 JB |
6371 | type = ada_check_typedef (type); |
6372 | ||
78134374 | 6373 | if (type == NULL || type->code () != TYPE_CODE_PTR) |
963a6417 PH |
6374 | return 0; |
6375 | else | |
96d887e8 | 6376 | { |
963a6417 | 6377 | const char *name = ada_type_name (TYPE_TARGET_TYPE (type)); |
5b4ee69b | 6378 | |
963a6417 | 6379 | return (name != NULL |
dda83cd7 | 6380 | && strcmp (name, "ada__tags__dispatch_table") == 0); |
96d887e8 | 6381 | } |
96d887e8 PH |
6382 | } |
6383 | ||
963a6417 | 6384 | /* The type of the tag on VAL. */ |
76a01679 | 6385 | |
de93309a | 6386 | static struct type * |
963a6417 | 6387 | ada_tag_type (struct value *val) |
96d887e8 | 6388 | { |
988f6b3d | 6389 | return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0); |
963a6417 | 6390 | } |
96d887e8 | 6391 | |
b50d69b5 JG |
6392 | /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95, |
6393 | retired at Ada 05). */ | |
6394 | ||
6395 | static int | |
6396 | is_ada95_tag (struct value *tag) | |
6397 | { | |
6398 | return ada_value_struct_elt (tag, "tsd", 1) != NULL; | |
6399 | } | |
6400 | ||
963a6417 | 6401 | /* The value of the tag on VAL. */ |
96d887e8 | 6402 | |
de93309a | 6403 | static struct value * |
963a6417 PH |
6404 | ada_value_tag (struct value *val) |
6405 | { | |
03ee6b2e | 6406 | return ada_value_struct_elt (val, "_tag", 0); |
96d887e8 PH |
6407 | } |
6408 | ||
963a6417 PH |
6409 | /* The value of the tag on the object of type TYPE whose contents are |
6410 | saved at VALADDR, if it is non-null, or is at memory address | |
0963b4bd | 6411 | ADDRESS. */ |
96d887e8 | 6412 | |
963a6417 | 6413 | static struct value * |
10a2c479 | 6414 | value_tag_from_contents_and_address (struct type *type, |
fc1a4b47 | 6415 | const gdb_byte *valaddr, |
dda83cd7 | 6416 | CORE_ADDR address) |
96d887e8 | 6417 | { |
b5385fc0 | 6418 | int tag_byte_offset; |
963a6417 | 6419 | struct type *tag_type; |
5b4ee69b | 6420 | |
963a6417 | 6421 | if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset, |
dda83cd7 | 6422 | NULL, NULL, NULL)) |
96d887e8 | 6423 | { |
fc1a4b47 | 6424 | const gdb_byte *valaddr1 = ((valaddr == NULL) |
10a2c479 AC |
6425 | ? NULL |
6426 | : valaddr + tag_byte_offset); | |
963a6417 | 6427 | CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset; |
96d887e8 | 6428 | |
963a6417 | 6429 | return value_from_contents_and_address (tag_type, valaddr1, address1); |
96d887e8 | 6430 | } |
963a6417 PH |
6431 | return NULL; |
6432 | } | |
96d887e8 | 6433 | |
963a6417 PH |
6434 | static struct type * |
6435 | type_from_tag (struct value *tag) | |
6436 | { | |
f5272a3b | 6437 | gdb::unique_xmalloc_ptr<char> type_name = ada_tag_name (tag); |
5b4ee69b | 6438 | |
963a6417 | 6439 | if (type_name != NULL) |
5c4258f4 | 6440 | return ada_find_any_type (ada_encode (type_name.get ()).c_str ()); |
963a6417 PH |
6441 | return NULL; |
6442 | } | |
96d887e8 | 6443 | |
b50d69b5 JG |
6444 | /* Given a value OBJ of a tagged type, return a value of this |
6445 | type at the base address of the object. The base address, as | |
6446 | defined in Ada.Tags, it is the address of the primary tag of | |
6447 | the object, and therefore where the field values of its full | |
6448 | view can be fetched. */ | |
6449 | ||
6450 | struct value * | |
6451 | ada_tag_value_at_base_address (struct value *obj) | |
6452 | { | |
b50d69b5 JG |
6453 | struct value *val; |
6454 | LONGEST offset_to_top = 0; | |
6455 | struct type *ptr_type, *obj_type; | |
6456 | struct value *tag; | |
6457 | CORE_ADDR base_address; | |
6458 | ||
6459 | obj_type = value_type (obj); | |
6460 | ||
6461 | /* It is the responsability of the caller to deref pointers. */ | |
6462 | ||
78134374 | 6463 | if (obj_type->code () == TYPE_CODE_PTR || obj_type->code () == TYPE_CODE_REF) |
b50d69b5 JG |
6464 | return obj; |
6465 | ||
6466 | tag = ada_value_tag (obj); | |
6467 | if (!tag) | |
6468 | return obj; | |
6469 | ||
6470 | /* Base addresses only appeared with Ada 05 and multiple inheritance. */ | |
6471 | ||
6472 | if (is_ada95_tag (tag)) | |
6473 | return obj; | |
6474 | ||
08f49010 XR |
6475 | ptr_type = language_lookup_primitive_type |
6476 | (language_def (language_ada), target_gdbarch(), "storage_offset"); | |
b50d69b5 JG |
6477 | ptr_type = lookup_pointer_type (ptr_type); |
6478 | val = value_cast (ptr_type, tag); | |
6479 | if (!val) | |
6480 | return obj; | |
6481 | ||
6482 | /* It is perfectly possible that an exception be raised while | |
6483 | trying to determine the base address, just like for the tag; | |
6484 | see ada_tag_name for more details. We do not print the error | |
6485 | message for the same reason. */ | |
6486 | ||
a70b8144 | 6487 | try |
b50d69b5 JG |
6488 | { |
6489 | offset_to_top = value_as_long (value_ind (value_ptradd (val, -2))); | |
6490 | } | |
6491 | ||
230d2906 | 6492 | catch (const gdb_exception_error &e) |
492d29ea PA |
6493 | { |
6494 | return obj; | |
6495 | } | |
b50d69b5 JG |
6496 | |
6497 | /* If offset is null, nothing to do. */ | |
6498 | ||
6499 | if (offset_to_top == 0) | |
6500 | return obj; | |
6501 | ||
6502 | /* -1 is a special case in Ada.Tags; however, what should be done | |
6503 | is not quite clear from the documentation. So do nothing for | |
6504 | now. */ | |
6505 | ||
6506 | if (offset_to_top == -1) | |
6507 | return obj; | |
6508 | ||
08f49010 XR |
6509 | /* OFFSET_TO_TOP used to be a positive value to be subtracted |
6510 | from the base address. This was however incompatible with | |
6511 | C++ dispatch table: C++ uses a *negative* value to *add* | |
6512 | to the base address. Ada's convention has therefore been | |
6513 | changed in GNAT 19.0w 20171023: since then, C++ and Ada | |
6514 | use the same convention. Here, we support both cases by | |
6515 | checking the sign of OFFSET_TO_TOP. */ | |
6516 | ||
6517 | if (offset_to_top > 0) | |
6518 | offset_to_top = -offset_to_top; | |
6519 | ||
6520 | base_address = value_address (obj) + offset_to_top; | |
b50d69b5 JG |
6521 | tag = value_tag_from_contents_and_address (obj_type, NULL, base_address); |
6522 | ||
6523 | /* Make sure that we have a proper tag at the new address. | |
6524 | Otherwise, offset_to_top is bogus (which can happen when | |
6525 | the object is not initialized yet). */ | |
6526 | ||
6527 | if (!tag) | |
6528 | return obj; | |
6529 | ||
6530 | obj_type = type_from_tag (tag); | |
6531 | ||
6532 | if (!obj_type) | |
6533 | return obj; | |
6534 | ||
6535 | return value_from_contents_and_address (obj_type, NULL, base_address); | |
6536 | } | |
6537 | ||
1b611343 JB |
6538 | /* Return the "ada__tags__type_specific_data" type. */ |
6539 | ||
6540 | static struct type * | |
6541 | ada_get_tsd_type (struct inferior *inf) | |
963a6417 | 6542 | { |
1b611343 | 6543 | struct ada_inferior_data *data = get_ada_inferior_data (inf); |
4c4b4cd2 | 6544 | |
1b611343 JB |
6545 | if (data->tsd_type == 0) |
6546 | data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data"); | |
6547 | return data->tsd_type; | |
6548 | } | |
529cad9c | 6549 | |
1b611343 JB |
6550 | /* Return the TSD (type-specific data) associated to the given TAG. |
6551 | TAG is assumed to be the tag of a tagged-type entity. | |
529cad9c | 6552 | |
1b611343 | 6553 | May return NULL if we are unable to get the TSD. */ |
4c4b4cd2 | 6554 | |
1b611343 JB |
6555 | static struct value * |
6556 | ada_get_tsd_from_tag (struct value *tag) | |
4c4b4cd2 | 6557 | { |
4c4b4cd2 | 6558 | struct value *val; |
1b611343 | 6559 | struct type *type; |
5b4ee69b | 6560 | |
1b611343 JB |
6561 | /* First option: The TSD is simply stored as a field of our TAG. |
6562 | Only older versions of GNAT would use this format, but we have | |
6563 | to test it first, because there are no visible markers for | |
6564 | the current approach except the absence of that field. */ | |
529cad9c | 6565 | |
1b611343 JB |
6566 | val = ada_value_struct_elt (tag, "tsd", 1); |
6567 | if (val) | |
6568 | return val; | |
e802dbe0 | 6569 | |
1b611343 JB |
6570 | /* Try the second representation for the dispatch table (in which |
6571 | there is no explicit 'tsd' field in the referent of the tag pointer, | |
6572 | and instead the tsd pointer is stored just before the dispatch | |
6573 | table. */ | |
e802dbe0 | 6574 | |
1b611343 JB |
6575 | type = ada_get_tsd_type (current_inferior()); |
6576 | if (type == NULL) | |
6577 | return NULL; | |
6578 | type = lookup_pointer_type (lookup_pointer_type (type)); | |
6579 | val = value_cast (type, tag); | |
6580 | if (val == NULL) | |
6581 | return NULL; | |
6582 | return value_ind (value_ptradd (val, -1)); | |
e802dbe0 JB |
6583 | } |
6584 | ||
1b611343 JB |
6585 | /* Given the TSD of a tag (type-specific data), return a string |
6586 | containing the name of the associated type. | |
6587 | ||
f5272a3b | 6588 | May return NULL if we are unable to determine the tag name. */ |
1b611343 | 6589 | |
f5272a3b | 6590 | static gdb::unique_xmalloc_ptr<char> |
1b611343 | 6591 | ada_tag_name_from_tsd (struct value *tsd) |
529cad9c | 6592 | { |
529cad9c | 6593 | char *p; |
1b611343 | 6594 | struct value *val; |
529cad9c | 6595 | |
1b611343 | 6596 | val = ada_value_struct_elt (tsd, "expanded_name", 1); |
4c4b4cd2 | 6597 | if (val == NULL) |
1b611343 | 6598 | return NULL; |
66920317 TT |
6599 | gdb::unique_xmalloc_ptr<char> buffer |
6600 | = target_read_string (value_as_address (val), INT_MAX); | |
6601 | if (buffer == nullptr) | |
f5272a3b TT |
6602 | return nullptr; |
6603 | ||
6604 | for (p = buffer.get (); *p != '\0'; ++p) | |
6605 | { | |
6606 | if (isalpha (*p)) | |
6607 | *p = tolower (*p); | |
6608 | } | |
6609 | ||
6610 | return buffer; | |
4c4b4cd2 PH |
6611 | } |
6612 | ||
6613 | /* The type name of the dynamic type denoted by the 'tag value TAG, as | |
1b611343 JB |
6614 | a C string. |
6615 | ||
6616 | Return NULL if the TAG is not an Ada tag, or if we were unable to | |
f5272a3b | 6617 | determine the name of that tag. */ |
4c4b4cd2 | 6618 | |
f5272a3b | 6619 | gdb::unique_xmalloc_ptr<char> |
4c4b4cd2 PH |
6620 | ada_tag_name (struct value *tag) |
6621 | { | |
f5272a3b | 6622 | gdb::unique_xmalloc_ptr<char> name; |
5b4ee69b | 6623 | |
df407dfe | 6624 | if (!ada_is_tag_type (value_type (tag))) |
4c4b4cd2 | 6625 | return NULL; |
1b611343 JB |
6626 | |
6627 | /* It is perfectly possible that an exception be raised while trying | |
6628 | to determine the TAG's name, even under normal circumstances: | |
6629 | The associated variable may be uninitialized or corrupted, for | |
6630 | instance. We do not let any exception propagate past this point. | |
6631 | instead we return NULL. | |
6632 | ||
6633 | We also do not print the error message either (which often is very | |
6634 | low-level (Eg: "Cannot read memory at 0x[...]"), but instead let | |
6635 | the caller print a more meaningful message if necessary. */ | |
a70b8144 | 6636 | try |
1b611343 JB |
6637 | { |
6638 | struct value *tsd = ada_get_tsd_from_tag (tag); | |
6639 | ||
6640 | if (tsd != NULL) | |
6641 | name = ada_tag_name_from_tsd (tsd); | |
6642 | } | |
230d2906 | 6643 | catch (const gdb_exception_error &e) |
492d29ea PA |
6644 | { |
6645 | } | |
1b611343 JB |
6646 | |
6647 | return name; | |
4c4b4cd2 PH |
6648 | } |
6649 | ||
6650 | /* The parent type of TYPE, or NULL if none. */ | |
14f9c5c9 | 6651 | |
d2e4a39e | 6652 | struct type * |
ebf56fd3 | 6653 | ada_parent_type (struct type *type) |
14f9c5c9 AS |
6654 | { |
6655 | int i; | |
6656 | ||
61ee279c | 6657 | type = ada_check_typedef (type); |
14f9c5c9 | 6658 | |
78134374 | 6659 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
6660 | return NULL; |
6661 | ||
1f704f76 | 6662 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 6663 | if (ada_is_parent_field (type, i)) |
0c1f74cf | 6664 | { |
dda83cd7 | 6665 | struct type *parent_type = type->field (i).type (); |
0c1f74cf | 6666 | |
dda83cd7 SM |
6667 | /* If the _parent field is a pointer, then dereference it. */ |
6668 | if (parent_type->code () == TYPE_CODE_PTR) | |
6669 | parent_type = TYPE_TARGET_TYPE (parent_type); | |
6670 | /* If there is a parallel XVS type, get the actual base type. */ | |
6671 | parent_type = ada_get_base_type (parent_type); | |
0c1f74cf | 6672 | |
dda83cd7 | 6673 | return ada_check_typedef (parent_type); |
0c1f74cf | 6674 | } |
14f9c5c9 AS |
6675 | |
6676 | return NULL; | |
6677 | } | |
6678 | ||
4c4b4cd2 PH |
6679 | /* True iff field number FIELD_NUM of structure type TYPE contains the |
6680 | parent-type (inherited) fields of a derived type. Assumes TYPE is | |
6681 | a structure type with at least FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6682 | |
6683 | int | |
ebf56fd3 | 6684 | ada_is_parent_field (struct type *type, int field_num) |
14f9c5c9 | 6685 | { |
61ee279c | 6686 | const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num); |
5b4ee69b | 6687 | |
4c4b4cd2 | 6688 | return (name != NULL |
dda83cd7 SM |
6689 | && (startswith (name, "PARENT") |
6690 | || startswith (name, "_parent"))); | |
14f9c5c9 AS |
6691 | } |
6692 | ||
4c4b4cd2 | 6693 | /* True iff field number FIELD_NUM of structure type TYPE is a |
14f9c5c9 | 6694 | transparent wrapper field (which should be silently traversed when doing |
4c4b4cd2 | 6695 | field selection and flattened when printing). Assumes TYPE is a |
14f9c5c9 | 6696 | structure type with at least FIELD_NUM+1 fields. Such fields are always |
4c4b4cd2 | 6697 | structures. */ |
14f9c5c9 AS |
6698 | |
6699 | int | |
ebf56fd3 | 6700 | ada_is_wrapper_field (struct type *type, int field_num) |
14f9c5c9 | 6701 | { |
d2e4a39e | 6702 | const char *name = TYPE_FIELD_NAME (type, field_num); |
5b4ee69b | 6703 | |
dddc0e16 JB |
6704 | if (name != NULL && strcmp (name, "RETVAL") == 0) |
6705 | { | |
6706 | /* This happens in functions with "out" or "in out" parameters | |
6707 | which are passed by copy. For such functions, GNAT describes | |
6708 | the function's return type as being a struct where the return | |
6709 | value is in a field called RETVAL, and where the other "out" | |
6710 | or "in out" parameters are fields of that struct. This is not | |
6711 | a wrapper. */ | |
6712 | return 0; | |
6713 | } | |
6714 | ||
d2e4a39e | 6715 | return (name != NULL |
dda83cd7 SM |
6716 | && (startswith (name, "PARENT") |
6717 | || strcmp (name, "REP") == 0 | |
6718 | || startswith (name, "_parent") | |
6719 | || name[0] == 'S' || name[0] == 'R' || name[0] == 'O')); | |
14f9c5c9 AS |
6720 | } |
6721 | ||
4c4b4cd2 PH |
6722 | /* True iff field number FIELD_NUM of structure or union type TYPE |
6723 | is a variant wrapper. Assumes TYPE is a structure type with at least | |
6724 | FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6725 | |
6726 | int | |
ebf56fd3 | 6727 | ada_is_variant_part (struct type *type, int field_num) |
14f9c5c9 | 6728 | { |
8ecb59f8 TT |
6729 | /* Only Ada types are eligible. */ |
6730 | if (!ADA_TYPE_P (type)) | |
6731 | return 0; | |
6732 | ||
940da03e | 6733 | struct type *field_type = type->field (field_num).type (); |
5b4ee69b | 6734 | |
78134374 SM |
6735 | return (field_type->code () == TYPE_CODE_UNION |
6736 | || (is_dynamic_field (type, field_num) | |
6737 | && (TYPE_TARGET_TYPE (field_type)->code () | |
c3e5cd34 | 6738 | == TYPE_CODE_UNION))); |
14f9c5c9 AS |
6739 | } |
6740 | ||
6741 | /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part) | |
4c4b4cd2 | 6742 | whose discriminants are contained in the record type OUTER_TYPE, |
7c964f07 UW |
6743 | returns the type of the controlling discriminant for the variant. |
6744 | May return NULL if the type could not be found. */ | |
14f9c5c9 | 6745 | |
d2e4a39e | 6746 | struct type * |
ebf56fd3 | 6747 | ada_variant_discrim_type (struct type *var_type, struct type *outer_type) |
14f9c5c9 | 6748 | { |
a121b7c1 | 6749 | const char *name = ada_variant_discrim_name (var_type); |
5b4ee69b | 6750 | |
988f6b3d | 6751 | return ada_lookup_struct_elt_type (outer_type, name, 1, 1); |
14f9c5c9 AS |
6752 | } |
6753 | ||
4c4b4cd2 | 6754 | /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a |
14f9c5c9 | 6755 | valid field number within it, returns 1 iff field FIELD_NUM of TYPE |
4c4b4cd2 | 6756 | represents a 'when others' clause; otherwise 0. */ |
14f9c5c9 | 6757 | |
de93309a | 6758 | static int |
ebf56fd3 | 6759 | ada_is_others_clause (struct type *type, int field_num) |
14f9c5c9 | 6760 | { |
d2e4a39e | 6761 | const char *name = TYPE_FIELD_NAME (type, field_num); |
5b4ee69b | 6762 | |
14f9c5c9 AS |
6763 | return (name != NULL && name[0] == 'O'); |
6764 | } | |
6765 | ||
6766 | /* Assuming that TYPE0 is the type of the variant part of a record, | |
4c4b4cd2 PH |
6767 | returns the name of the discriminant controlling the variant. |
6768 | The value is valid until the next call to ada_variant_discrim_name. */ | |
14f9c5c9 | 6769 | |
a121b7c1 | 6770 | const char * |
ebf56fd3 | 6771 | ada_variant_discrim_name (struct type *type0) |
14f9c5c9 | 6772 | { |
d2e4a39e | 6773 | static char *result = NULL; |
14f9c5c9 | 6774 | static size_t result_len = 0; |
d2e4a39e AS |
6775 | struct type *type; |
6776 | const char *name; | |
6777 | const char *discrim_end; | |
6778 | const char *discrim_start; | |
14f9c5c9 | 6779 | |
78134374 | 6780 | if (type0->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
6781 | type = TYPE_TARGET_TYPE (type0); |
6782 | else | |
6783 | type = type0; | |
6784 | ||
6785 | name = ada_type_name (type); | |
6786 | ||
6787 | if (name == NULL || name[0] == '\000') | |
6788 | return ""; | |
6789 | ||
6790 | for (discrim_end = name + strlen (name) - 6; discrim_end != name; | |
6791 | discrim_end -= 1) | |
6792 | { | |
61012eef | 6793 | if (startswith (discrim_end, "___XVN")) |
dda83cd7 | 6794 | break; |
14f9c5c9 AS |
6795 | } |
6796 | if (discrim_end == name) | |
6797 | return ""; | |
6798 | ||
d2e4a39e | 6799 | for (discrim_start = discrim_end; discrim_start != name + 3; |
14f9c5c9 AS |
6800 | discrim_start -= 1) |
6801 | { | |
d2e4a39e | 6802 | if (discrim_start == name + 1) |
dda83cd7 | 6803 | return ""; |
76a01679 | 6804 | if ((discrim_start > name + 3 |
dda83cd7 SM |
6805 | && startswith (discrim_start - 3, "___")) |
6806 | || discrim_start[-1] == '.') | |
6807 | break; | |
14f9c5c9 AS |
6808 | } |
6809 | ||
6810 | GROW_VECT (result, result_len, discrim_end - discrim_start + 1); | |
6811 | strncpy (result, discrim_start, discrim_end - discrim_start); | |
d2e4a39e | 6812 | result[discrim_end - discrim_start] = '\0'; |
14f9c5c9 AS |
6813 | return result; |
6814 | } | |
6815 | ||
4c4b4cd2 PH |
6816 | /* Scan STR for a subtype-encoded number, beginning at position K. |
6817 | Put the position of the character just past the number scanned in | |
6818 | *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL. | |
6819 | Return 1 if there was a valid number at the given position, and 0 | |
6820 | otherwise. A "subtype-encoded" number consists of the absolute value | |
6821 | in decimal, followed by the letter 'm' to indicate a negative number. | |
6822 | Assumes 0m does not occur. */ | |
14f9c5c9 AS |
6823 | |
6824 | int | |
d2e4a39e | 6825 | ada_scan_number (const char str[], int k, LONGEST * R, int *new_k) |
14f9c5c9 AS |
6826 | { |
6827 | ULONGEST RU; | |
6828 | ||
d2e4a39e | 6829 | if (!isdigit (str[k])) |
14f9c5c9 AS |
6830 | return 0; |
6831 | ||
4c4b4cd2 | 6832 | /* Do it the hard way so as not to make any assumption about |
14f9c5c9 | 6833 | the relationship of unsigned long (%lu scan format code) and |
4c4b4cd2 | 6834 | LONGEST. */ |
14f9c5c9 AS |
6835 | RU = 0; |
6836 | while (isdigit (str[k])) | |
6837 | { | |
d2e4a39e | 6838 | RU = RU * 10 + (str[k] - '0'); |
14f9c5c9 AS |
6839 | k += 1; |
6840 | } | |
6841 | ||
d2e4a39e | 6842 | if (str[k] == 'm') |
14f9c5c9 AS |
6843 | { |
6844 | if (R != NULL) | |
dda83cd7 | 6845 | *R = (-(LONGEST) (RU - 1)) - 1; |
14f9c5c9 AS |
6846 | k += 1; |
6847 | } | |
6848 | else if (R != NULL) | |
6849 | *R = (LONGEST) RU; | |
6850 | ||
4c4b4cd2 | 6851 | /* NOTE on the above: Technically, C does not say what the results of |
14f9c5c9 AS |
6852 | - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive |
6853 | number representable as a LONGEST (although either would probably work | |
6854 | in most implementations). When RU>0, the locution in the then branch | |
4c4b4cd2 | 6855 | above is always equivalent to the negative of RU. */ |
14f9c5c9 AS |
6856 | |
6857 | if (new_k != NULL) | |
6858 | *new_k = k; | |
6859 | return 1; | |
6860 | } | |
6861 | ||
4c4b4cd2 PH |
6862 | /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field), |
6863 | and FIELD_NUM is a valid field number within it, returns 1 iff VAL is | |
6864 | in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */ | |
14f9c5c9 | 6865 | |
de93309a | 6866 | static int |
ebf56fd3 | 6867 | ada_in_variant (LONGEST val, struct type *type, int field_num) |
14f9c5c9 | 6868 | { |
d2e4a39e | 6869 | const char *name = TYPE_FIELD_NAME (type, field_num); |
14f9c5c9 AS |
6870 | int p; |
6871 | ||
6872 | p = 0; | |
6873 | while (1) | |
6874 | { | |
d2e4a39e | 6875 | switch (name[p]) |
dda83cd7 SM |
6876 | { |
6877 | case '\0': | |
6878 | return 0; | |
6879 | case 'S': | |
6880 | { | |
6881 | LONGEST W; | |
6882 | ||
6883 | if (!ada_scan_number (name, p + 1, &W, &p)) | |
6884 | return 0; | |
6885 | if (val == W) | |
6886 | return 1; | |
6887 | break; | |
6888 | } | |
6889 | case 'R': | |
6890 | { | |
6891 | LONGEST L, U; | |
6892 | ||
6893 | if (!ada_scan_number (name, p + 1, &L, &p) | |
6894 | || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p)) | |
6895 | return 0; | |
6896 | if (val >= L && val <= U) | |
6897 | return 1; | |
6898 | break; | |
6899 | } | |
6900 | case 'O': | |
6901 | return 1; | |
6902 | default: | |
6903 | return 0; | |
6904 | } | |
4c4b4cd2 PH |
6905 | } |
6906 | } | |
6907 | ||
0963b4bd | 6908 | /* FIXME: Lots of redundancy below. Try to consolidate. */ |
4c4b4cd2 PH |
6909 | |
6910 | /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type | |
6911 | ARG_TYPE, extract and return the value of one of its (non-static) | |
6912 | fields. FIELDNO says which field. Differs from value_primitive_field | |
6913 | only in that it can handle packed values of arbitrary type. */ | |
14f9c5c9 | 6914 | |
5eb68a39 | 6915 | struct value * |
d2e4a39e | 6916 | ada_value_primitive_field (struct value *arg1, int offset, int fieldno, |
dda83cd7 | 6917 | struct type *arg_type) |
14f9c5c9 | 6918 | { |
14f9c5c9 AS |
6919 | struct type *type; |
6920 | ||
61ee279c | 6921 | arg_type = ada_check_typedef (arg_type); |
940da03e | 6922 | type = arg_type->field (fieldno).type (); |
14f9c5c9 | 6923 | |
4504bbde TT |
6924 | /* Handle packed fields. It might be that the field is not packed |
6925 | relative to its containing structure, but the structure itself is | |
6926 | packed; in this case we must take the bit-field path. */ | |
6927 | if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0 || value_bitpos (arg1) != 0) | |
14f9c5c9 AS |
6928 | { |
6929 | int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno); | |
6930 | int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno); | |
d2e4a39e | 6931 | |
0fd88904 | 6932 | return ada_value_primitive_packed_val (arg1, value_contents (arg1), |
dda83cd7 SM |
6933 | offset + bit_pos / 8, |
6934 | bit_pos % 8, bit_size, type); | |
14f9c5c9 AS |
6935 | } |
6936 | else | |
6937 | return value_primitive_field (arg1, offset, fieldno, arg_type); | |
6938 | } | |
6939 | ||
52ce6436 PH |
6940 | /* Find field with name NAME in object of type TYPE. If found, |
6941 | set the following for each argument that is non-null: | |
6942 | - *FIELD_TYPE_P to the field's type; | |
6943 | - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within | |
6944 | an object of that type; | |
6945 | - *BIT_OFFSET_P to the bit offset modulo byte size of the field; | |
6946 | - *BIT_SIZE_P to its size in bits if the field is packed, and | |
6947 | 0 otherwise; | |
6948 | If INDEX_P is non-null, increment *INDEX_P by the number of source-visible | |
6949 | fields up to but not including the desired field, or by the total | |
6950 | number of fields if not found. A NULL value of NAME never | |
6951 | matches; the function just counts visible fields in this case. | |
6952 | ||
828d5846 XR |
6953 | Notice that we need to handle when a tagged record hierarchy |
6954 | has some components with the same name, like in this scenario: | |
6955 | ||
6956 | type Top_T is tagged record | |
dda83cd7 SM |
6957 | N : Integer := 1; |
6958 | U : Integer := 974; | |
6959 | A : Integer := 48; | |
828d5846 XR |
6960 | end record; |
6961 | ||
6962 | type Middle_T is new Top.Top_T with record | |
dda83cd7 SM |
6963 | N : Character := 'a'; |
6964 | C : Integer := 3; | |
828d5846 XR |
6965 | end record; |
6966 | ||
6967 | type Bottom_T is new Middle.Middle_T with record | |
dda83cd7 SM |
6968 | N : Float := 4.0; |
6969 | C : Character := '5'; | |
6970 | X : Integer := 6; | |
6971 | A : Character := 'J'; | |
828d5846 XR |
6972 | end record; |
6973 | ||
6974 | Let's say we now have a variable declared and initialized as follow: | |
6975 | ||
6976 | TC : Top_A := new Bottom_T; | |
6977 | ||
6978 | And then we use this variable to call this function | |
6979 | ||
6980 | procedure Assign (Obj: in out Top_T; TV : Integer); | |
6981 | ||
6982 | as follow: | |
6983 | ||
6984 | Assign (Top_T (B), 12); | |
6985 | ||
6986 | Now, we're in the debugger, and we're inside that procedure | |
6987 | then and we want to print the value of obj.c: | |
6988 | ||
6989 | Usually, the tagged record or one of the parent type owns the | |
6990 | component to print and there's no issue but in this particular | |
6991 | case, what does it mean to ask for Obj.C? Since the actual | |
6992 | type for object is type Bottom_T, it could mean two things: type | |
6993 | component C from the Middle_T view, but also component C from | |
6994 | Bottom_T. So in that "undefined" case, when the component is | |
6995 | not found in the non-resolved type (which includes all the | |
6996 | components of the parent type), then resolve it and see if we | |
6997 | get better luck once expanded. | |
6998 | ||
6999 | In the case of homonyms in the derived tagged type, we don't | |
7000 | guaranty anything, and pick the one that's easiest for us | |
7001 | to program. | |
7002 | ||
0963b4bd | 7003 | Returns 1 if found, 0 otherwise. */ |
52ce6436 | 7004 | |
4c4b4cd2 | 7005 | static int |
0d5cff50 | 7006 | find_struct_field (const char *name, struct type *type, int offset, |
dda83cd7 SM |
7007 | struct type **field_type_p, |
7008 | int *byte_offset_p, int *bit_offset_p, int *bit_size_p, | |
52ce6436 | 7009 | int *index_p) |
4c4b4cd2 PH |
7010 | { |
7011 | int i; | |
828d5846 | 7012 | int parent_offset = -1; |
4c4b4cd2 | 7013 | |
61ee279c | 7014 | type = ada_check_typedef (type); |
76a01679 | 7015 | |
52ce6436 PH |
7016 | if (field_type_p != NULL) |
7017 | *field_type_p = NULL; | |
7018 | if (byte_offset_p != NULL) | |
d5d6fca5 | 7019 | *byte_offset_p = 0; |
52ce6436 PH |
7020 | if (bit_offset_p != NULL) |
7021 | *bit_offset_p = 0; | |
7022 | if (bit_size_p != NULL) | |
7023 | *bit_size_p = 0; | |
7024 | ||
1f704f76 | 7025 | for (i = 0; i < type->num_fields (); i += 1) |
4c4b4cd2 PH |
7026 | { |
7027 | int bit_pos = TYPE_FIELD_BITPOS (type, i); | |
7028 | int fld_offset = offset + bit_pos / 8; | |
0d5cff50 | 7029 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
76a01679 | 7030 | |
4c4b4cd2 | 7031 | if (t_field_name == NULL) |
dda83cd7 | 7032 | continue; |
4c4b4cd2 | 7033 | |
828d5846 | 7034 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7035 | { |
828d5846 XR |
7036 | /* This is a field pointing us to the parent type of a tagged |
7037 | type. As hinted in this function's documentation, we give | |
7038 | preference to fields in the current record first, so what | |
7039 | we do here is just record the index of this field before | |
7040 | we skip it. If it turns out we couldn't find our field | |
7041 | in the current record, then we'll get back to it and search | |
7042 | inside it whether the field might exist in the parent. */ | |
7043 | ||
dda83cd7 SM |
7044 | parent_offset = i; |
7045 | continue; | |
7046 | } | |
828d5846 | 7047 | |
52ce6436 | 7048 | else if (name != NULL && field_name_match (t_field_name, name)) |
dda83cd7 SM |
7049 | { |
7050 | int bit_size = TYPE_FIELD_BITSIZE (type, i); | |
5b4ee69b | 7051 | |
52ce6436 | 7052 | if (field_type_p != NULL) |
940da03e | 7053 | *field_type_p = type->field (i).type (); |
52ce6436 PH |
7054 | if (byte_offset_p != NULL) |
7055 | *byte_offset_p = fld_offset; | |
7056 | if (bit_offset_p != NULL) | |
7057 | *bit_offset_p = bit_pos % 8; | |
7058 | if (bit_size_p != NULL) | |
7059 | *bit_size_p = bit_size; | |
dda83cd7 SM |
7060 | return 1; |
7061 | } | |
4c4b4cd2 | 7062 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 | 7063 | { |
940da03e | 7064 | if (find_struct_field (name, type->field (i).type (), fld_offset, |
52ce6436 PH |
7065 | field_type_p, byte_offset_p, bit_offset_p, |
7066 | bit_size_p, index_p)) | |
dda83cd7 SM |
7067 | return 1; |
7068 | } | |
4c4b4cd2 | 7069 | else if (ada_is_variant_part (type, i)) |
dda83cd7 | 7070 | { |
52ce6436 PH |
7071 | /* PNH: Wait. Do we ever execute this section, or is ARG always of |
7072 | fixed type?? */ | |
dda83cd7 SM |
7073 | int j; |
7074 | struct type *field_type | |
940da03e | 7075 | = ada_check_typedef (type->field (i).type ()); |
4c4b4cd2 | 7076 | |
dda83cd7 SM |
7077 | for (j = 0; j < field_type->num_fields (); j += 1) |
7078 | { | |
7079 | if (find_struct_field (name, field_type->field (j).type (), | |
7080 | fld_offset | |
7081 | + TYPE_FIELD_BITPOS (field_type, j) / 8, | |
7082 | field_type_p, byte_offset_p, | |
7083 | bit_offset_p, bit_size_p, index_p)) | |
7084 | return 1; | |
7085 | } | |
7086 | } | |
52ce6436 PH |
7087 | else if (index_p != NULL) |
7088 | *index_p += 1; | |
4c4b4cd2 | 7089 | } |
828d5846 XR |
7090 | |
7091 | /* Field not found so far. If this is a tagged type which | |
7092 | has a parent, try finding that field in the parent now. */ | |
7093 | ||
7094 | if (parent_offset != -1) | |
7095 | { | |
7096 | int bit_pos = TYPE_FIELD_BITPOS (type, parent_offset); | |
7097 | int fld_offset = offset + bit_pos / 8; | |
7098 | ||
940da03e | 7099 | if (find_struct_field (name, type->field (parent_offset).type (), |
dda83cd7 SM |
7100 | fld_offset, field_type_p, byte_offset_p, |
7101 | bit_offset_p, bit_size_p, index_p)) | |
7102 | return 1; | |
828d5846 XR |
7103 | } |
7104 | ||
4c4b4cd2 PH |
7105 | return 0; |
7106 | } | |
7107 | ||
0963b4bd | 7108 | /* Number of user-visible fields in record type TYPE. */ |
4c4b4cd2 | 7109 | |
52ce6436 PH |
7110 | static int |
7111 | num_visible_fields (struct type *type) | |
7112 | { | |
7113 | int n; | |
5b4ee69b | 7114 | |
52ce6436 PH |
7115 | n = 0; |
7116 | find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n); | |
7117 | return n; | |
7118 | } | |
14f9c5c9 | 7119 | |
4c4b4cd2 | 7120 | /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes, |
14f9c5c9 AS |
7121 | and search in it assuming it has (class) type TYPE. |
7122 | If found, return value, else return NULL. | |
7123 | ||
828d5846 XR |
7124 | Searches recursively through wrapper fields (e.g., '_parent'). |
7125 | ||
7126 | In the case of homonyms in the tagged types, please refer to the | |
7127 | long explanation in find_struct_field's function documentation. */ | |
14f9c5c9 | 7128 | |
4c4b4cd2 | 7129 | static struct value * |
108d56a4 | 7130 | ada_search_struct_field (const char *name, struct value *arg, int offset, |
dda83cd7 | 7131 | struct type *type) |
14f9c5c9 AS |
7132 | { |
7133 | int i; | |
828d5846 | 7134 | int parent_offset = -1; |
14f9c5c9 | 7135 | |
5b4ee69b | 7136 | type = ada_check_typedef (type); |
1f704f76 | 7137 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7138 | { |
0d5cff50 | 7139 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
14f9c5c9 AS |
7140 | |
7141 | if (t_field_name == NULL) | |
dda83cd7 | 7142 | continue; |
14f9c5c9 | 7143 | |
828d5846 | 7144 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7145 | { |
828d5846 XR |
7146 | /* This is a field pointing us to the parent type of a tagged |
7147 | type. As hinted in this function's documentation, we give | |
7148 | preference to fields in the current record first, so what | |
7149 | we do here is just record the index of this field before | |
7150 | we skip it. If it turns out we couldn't find our field | |
7151 | in the current record, then we'll get back to it and search | |
7152 | inside it whether the field might exist in the parent. */ | |
7153 | ||
dda83cd7 SM |
7154 | parent_offset = i; |
7155 | continue; | |
7156 | } | |
828d5846 | 7157 | |
14f9c5c9 | 7158 | else if (field_name_match (t_field_name, name)) |
dda83cd7 | 7159 | return ada_value_primitive_field (arg, offset, i, type); |
14f9c5c9 AS |
7160 | |
7161 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7162 | { |
7163 | struct value *v = /* Do not let indent join lines here. */ | |
7164 | ada_search_struct_field (name, arg, | |
7165 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
7166 | type->field (i).type ()); | |
5b4ee69b | 7167 | |
dda83cd7 SM |
7168 | if (v != NULL) |
7169 | return v; | |
7170 | } | |
14f9c5c9 AS |
7171 | |
7172 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7173 | { |
0963b4bd | 7174 | /* PNH: Do we ever get here? See find_struct_field. */ |
dda83cd7 SM |
7175 | int j; |
7176 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
7177 | int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; | |
4c4b4cd2 | 7178 | |
dda83cd7 SM |
7179 | for (j = 0; j < field_type->num_fields (); j += 1) |
7180 | { | |
7181 | struct value *v = ada_search_struct_field /* Force line | |
0963b4bd | 7182 | break. */ |
dda83cd7 SM |
7183 | (name, arg, |
7184 | var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8, | |
7185 | field_type->field (j).type ()); | |
5b4ee69b | 7186 | |
dda83cd7 SM |
7187 | if (v != NULL) |
7188 | return v; | |
7189 | } | |
7190 | } | |
14f9c5c9 | 7191 | } |
828d5846 XR |
7192 | |
7193 | /* Field not found so far. If this is a tagged type which | |
7194 | has a parent, try finding that field in the parent now. */ | |
7195 | ||
7196 | if (parent_offset != -1) | |
7197 | { | |
7198 | struct value *v = ada_search_struct_field ( | |
7199 | name, arg, offset + TYPE_FIELD_BITPOS (type, parent_offset) / 8, | |
940da03e | 7200 | type->field (parent_offset).type ()); |
828d5846 XR |
7201 | |
7202 | if (v != NULL) | |
dda83cd7 | 7203 | return v; |
828d5846 XR |
7204 | } |
7205 | ||
14f9c5c9 AS |
7206 | return NULL; |
7207 | } | |
d2e4a39e | 7208 | |
52ce6436 PH |
7209 | static struct value *ada_index_struct_field_1 (int *, struct value *, |
7210 | int, struct type *); | |
7211 | ||
7212 | ||
7213 | /* Return field #INDEX in ARG, where the index is that returned by | |
7214 | * find_struct_field through its INDEX_P argument. Adjust the address | |
7215 | * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE. | |
0963b4bd | 7216 | * If found, return value, else return NULL. */ |
52ce6436 PH |
7217 | |
7218 | static struct value * | |
7219 | ada_index_struct_field (int index, struct value *arg, int offset, | |
7220 | struct type *type) | |
7221 | { | |
7222 | return ada_index_struct_field_1 (&index, arg, offset, type); | |
7223 | } | |
7224 | ||
7225 | ||
7226 | /* Auxiliary function for ada_index_struct_field. Like | |
7227 | * ada_index_struct_field, but takes index from *INDEX_P and modifies | |
0963b4bd | 7228 | * *INDEX_P. */ |
52ce6436 PH |
7229 | |
7230 | static struct value * | |
7231 | ada_index_struct_field_1 (int *index_p, struct value *arg, int offset, | |
7232 | struct type *type) | |
7233 | { | |
7234 | int i; | |
7235 | type = ada_check_typedef (type); | |
7236 | ||
1f704f76 | 7237 | for (i = 0; i < type->num_fields (); i += 1) |
52ce6436 PH |
7238 | { |
7239 | if (TYPE_FIELD_NAME (type, i) == NULL) | |
dda83cd7 | 7240 | continue; |
52ce6436 | 7241 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 SM |
7242 | { |
7243 | struct value *v = /* Do not let indent join lines here. */ | |
7244 | ada_index_struct_field_1 (index_p, arg, | |
52ce6436 | 7245 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
940da03e | 7246 | type->field (i).type ()); |
5b4ee69b | 7247 | |
dda83cd7 SM |
7248 | if (v != NULL) |
7249 | return v; | |
7250 | } | |
52ce6436 PH |
7251 | |
7252 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7253 | { |
52ce6436 | 7254 | /* PNH: Do we ever get here? See ada_search_struct_field, |
0963b4bd | 7255 | find_struct_field. */ |
52ce6436 | 7256 | error (_("Cannot assign this kind of variant record")); |
dda83cd7 | 7257 | } |
52ce6436 | 7258 | else if (*index_p == 0) |
dda83cd7 | 7259 | return ada_value_primitive_field (arg, offset, i, type); |
52ce6436 PH |
7260 | else |
7261 | *index_p -= 1; | |
7262 | } | |
7263 | return NULL; | |
7264 | } | |
7265 | ||
3b4de39c | 7266 | /* Return a string representation of type TYPE. */ |
99bbb428 | 7267 | |
3b4de39c | 7268 | static std::string |
99bbb428 PA |
7269 | type_as_string (struct type *type) |
7270 | { | |
d7e74731 | 7271 | string_file tmp_stream; |
99bbb428 | 7272 | |
d7e74731 | 7273 | type_print (type, "", &tmp_stream, -1); |
99bbb428 | 7274 | |
d7e74731 | 7275 | return std::move (tmp_stream.string ()); |
99bbb428 PA |
7276 | } |
7277 | ||
14f9c5c9 | 7278 | /* Given a type TYPE, look up the type of the component of type named NAME. |
4c4b4cd2 PH |
7279 | If DISPP is non-null, add its byte displacement from the beginning of a |
7280 | structure (pointed to by a value) of type TYPE to *DISPP (does not | |
14f9c5c9 AS |
7281 | work for packed fields). |
7282 | ||
7283 | Matches any field whose name has NAME as a prefix, possibly | |
4c4b4cd2 | 7284 | followed by "___". |
14f9c5c9 | 7285 | |
0963b4bd | 7286 | TYPE can be either a struct or union. If REFOK, TYPE may also |
4c4b4cd2 PH |
7287 | be a (pointer or reference)+ to a struct or union, and the |
7288 | ultimate target type will be searched. | |
14f9c5c9 AS |
7289 | |
7290 | Looks recursively into variant clauses and parent types. | |
7291 | ||
828d5846 XR |
7292 | In the case of homonyms in the tagged types, please refer to the |
7293 | long explanation in find_struct_field's function documentation. | |
7294 | ||
4c4b4cd2 PH |
7295 | If NOERR is nonzero, return NULL if NAME is not suitably defined or |
7296 | TYPE is not a type of the right kind. */ | |
14f9c5c9 | 7297 | |
4c4b4cd2 | 7298 | static struct type * |
a121b7c1 | 7299 | ada_lookup_struct_elt_type (struct type *type, const char *name, int refok, |
dda83cd7 | 7300 | int noerr) |
14f9c5c9 AS |
7301 | { |
7302 | int i; | |
828d5846 | 7303 | int parent_offset = -1; |
14f9c5c9 AS |
7304 | |
7305 | if (name == NULL) | |
7306 | goto BadName; | |
7307 | ||
76a01679 | 7308 | if (refok && type != NULL) |
4c4b4cd2 PH |
7309 | while (1) |
7310 | { | |
dda83cd7 SM |
7311 | type = ada_check_typedef (type); |
7312 | if (type->code () != TYPE_CODE_PTR && type->code () != TYPE_CODE_REF) | |
7313 | break; | |
7314 | type = TYPE_TARGET_TYPE (type); | |
4c4b4cd2 | 7315 | } |
14f9c5c9 | 7316 | |
76a01679 | 7317 | if (type == NULL |
78134374 SM |
7318 | || (type->code () != TYPE_CODE_STRUCT |
7319 | && type->code () != TYPE_CODE_UNION)) | |
14f9c5c9 | 7320 | { |
4c4b4cd2 | 7321 | if (noerr) |
dda83cd7 | 7322 | return NULL; |
99bbb428 | 7323 | |
3b4de39c PA |
7324 | error (_("Type %s is not a structure or union type"), |
7325 | type != NULL ? type_as_string (type).c_str () : _("(null)")); | |
14f9c5c9 AS |
7326 | } |
7327 | ||
7328 | type = to_static_fixed_type (type); | |
7329 | ||
1f704f76 | 7330 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7331 | { |
0d5cff50 | 7332 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
14f9c5c9 | 7333 | struct type *t; |
d2e4a39e | 7334 | |
14f9c5c9 | 7335 | if (t_field_name == NULL) |
dda83cd7 | 7336 | continue; |
14f9c5c9 | 7337 | |
828d5846 | 7338 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7339 | { |
828d5846 XR |
7340 | /* This is a field pointing us to the parent type of a tagged |
7341 | type. As hinted in this function's documentation, we give | |
7342 | preference to fields in the current record first, so what | |
7343 | we do here is just record the index of this field before | |
7344 | we skip it. If it turns out we couldn't find our field | |
7345 | in the current record, then we'll get back to it and search | |
7346 | inside it whether the field might exist in the parent. */ | |
7347 | ||
dda83cd7 SM |
7348 | parent_offset = i; |
7349 | continue; | |
7350 | } | |
828d5846 | 7351 | |
14f9c5c9 | 7352 | else if (field_name_match (t_field_name, name)) |
940da03e | 7353 | return type->field (i).type (); |
14f9c5c9 AS |
7354 | |
7355 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7356 | { |
7357 | t = ada_lookup_struct_elt_type (type->field (i).type (), name, | |
7358 | 0, 1); | |
7359 | if (t != NULL) | |
988f6b3d | 7360 | return t; |
dda83cd7 | 7361 | } |
14f9c5c9 AS |
7362 | |
7363 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 SM |
7364 | { |
7365 | int j; | |
7366 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
4c4b4cd2 | 7367 | |
dda83cd7 SM |
7368 | for (j = field_type->num_fields () - 1; j >= 0; j -= 1) |
7369 | { | |
b1f33ddd | 7370 | /* FIXME pnh 2008/01/26: We check for a field that is |
dda83cd7 | 7371 | NOT wrapped in a struct, since the compiler sometimes |
b1f33ddd | 7372 | generates these for unchecked variant types. Revisit |
dda83cd7 | 7373 | if the compiler changes this practice. */ |
0d5cff50 | 7374 | const char *v_field_name = TYPE_FIELD_NAME (field_type, j); |
988f6b3d | 7375 | |
b1f33ddd JB |
7376 | if (v_field_name != NULL |
7377 | && field_name_match (v_field_name, name)) | |
940da03e | 7378 | t = field_type->field (j).type (); |
b1f33ddd | 7379 | else |
940da03e | 7380 | t = ada_lookup_struct_elt_type (field_type->field (j).type (), |
988f6b3d | 7381 | name, 0, 1); |
b1f33ddd | 7382 | |
dda83cd7 | 7383 | if (t != NULL) |
988f6b3d | 7384 | return t; |
dda83cd7 SM |
7385 | } |
7386 | } | |
14f9c5c9 AS |
7387 | |
7388 | } | |
7389 | ||
828d5846 XR |
7390 | /* Field not found so far. If this is a tagged type which |
7391 | has a parent, try finding that field in the parent now. */ | |
7392 | ||
7393 | if (parent_offset != -1) | |
7394 | { | |
dda83cd7 | 7395 | struct type *t; |
828d5846 | 7396 | |
dda83cd7 SM |
7397 | t = ada_lookup_struct_elt_type (type->field (parent_offset).type (), |
7398 | name, 0, 1); | |
7399 | if (t != NULL) | |
828d5846 XR |
7400 | return t; |
7401 | } | |
7402 | ||
14f9c5c9 | 7403 | BadName: |
d2e4a39e | 7404 | if (!noerr) |
14f9c5c9 | 7405 | { |
2b2798cc | 7406 | const char *name_str = name != NULL ? name : _("<null>"); |
99bbb428 PA |
7407 | |
7408 | error (_("Type %s has no component named %s"), | |
3b4de39c | 7409 | type_as_string (type).c_str (), name_str); |
14f9c5c9 AS |
7410 | } |
7411 | ||
7412 | return NULL; | |
7413 | } | |
7414 | ||
b1f33ddd JB |
7415 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
7416 | within a value of type OUTER_TYPE, return true iff VAR_TYPE | |
7417 | represents an unchecked union (that is, the variant part of a | |
0963b4bd | 7418 | record that is named in an Unchecked_Union pragma). */ |
b1f33ddd JB |
7419 | |
7420 | static int | |
7421 | is_unchecked_variant (struct type *var_type, struct type *outer_type) | |
7422 | { | |
a121b7c1 | 7423 | const char *discrim_name = ada_variant_discrim_name (var_type); |
5b4ee69b | 7424 | |
988f6b3d | 7425 | return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1) == NULL); |
b1f33ddd JB |
7426 | } |
7427 | ||
7428 | ||
14f9c5c9 | 7429 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
d8af9068 | 7430 | within OUTER, determine which variant clause (field number in VAR_TYPE, |
4c4b4cd2 | 7431 | numbering from 0) is applicable. Returns -1 if none are. */ |
14f9c5c9 | 7432 | |
d2e4a39e | 7433 | int |
d8af9068 | 7434 | ada_which_variant_applies (struct type *var_type, struct value *outer) |
14f9c5c9 AS |
7435 | { |
7436 | int others_clause; | |
7437 | int i; | |
a121b7c1 | 7438 | const char *discrim_name = ada_variant_discrim_name (var_type); |
0c281816 | 7439 | struct value *discrim; |
14f9c5c9 AS |
7440 | LONGEST discrim_val; |
7441 | ||
012370f6 TT |
7442 | /* Using plain value_from_contents_and_address here causes problems |
7443 | because we will end up trying to resolve a type that is currently | |
7444 | being constructed. */ | |
0c281816 JB |
7445 | discrim = ada_value_struct_elt (outer, discrim_name, 1); |
7446 | if (discrim == NULL) | |
14f9c5c9 | 7447 | return -1; |
0c281816 | 7448 | discrim_val = value_as_long (discrim); |
14f9c5c9 AS |
7449 | |
7450 | others_clause = -1; | |
1f704f76 | 7451 | for (i = 0; i < var_type->num_fields (); i += 1) |
14f9c5c9 AS |
7452 | { |
7453 | if (ada_is_others_clause (var_type, i)) | |
dda83cd7 | 7454 | others_clause = i; |
14f9c5c9 | 7455 | else if (ada_in_variant (discrim_val, var_type, i)) |
dda83cd7 | 7456 | return i; |
14f9c5c9 AS |
7457 | } |
7458 | ||
7459 | return others_clause; | |
7460 | } | |
d2e4a39e | 7461 | \f |
14f9c5c9 AS |
7462 | |
7463 | ||
dda83cd7 | 7464 | /* Dynamic-Sized Records */ |
14f9c5c9 AS |
7465 | |
7466 | /* Strategy: The type ostensibly attached to a value with dynamic size | |
7467 | (i.e., a size that is not statically recorded in the debugging | |
7468 | data) does not accurately reflect the size or layout of the value. | |
7469 | Our strategy is to convert these values to values with accurate, | |
4c4b4cd2 | 7470 | conventional types that are constructed on the fly. */ |
14f9c5c9 AS |
7471 | |
7472 | /* There is a subtle and tricky problem here. In general, we cannot | |
7473 | determine the size of dynamic records without its data. However, | |
7474 | the 'struct value' data structure, which GDB uses to represent | |
7475 | quantities in the inferior process (the target), requires the size | |
7476 | of the type at the time of its allocation in order to reserve space | |
7477 | for GDB's internal copy of the data. That's why the | |
7478 | 'to_fixed_xxx_type' routines take (target) addresses as parameters, | |
4c4b4cd2 | 7479 | rather than struct value*s. |
14f9c5c9 AS |
7480 | |
7481 | However, GDB's internal history variables ($1, $2, etc.) are | |
7482 | struct value*s containing internal copies of the data that are not, in | |
7483 | general, the same as the data at their corresponding addresses in | |
7484 | the target. Fortunately, the types we give to these values are all | |
7485 | conventional, fixed-size types (as per the strategy described | |
7486 | above), so that we don't usually have to perform the | |
7487 | 'to_fixed_xxx_type' conversions to look at their values. | |
7488 | Unfortunately, there is one exception: if one of the internal | |
7489 | history variables is an array whose elements are unconstrained | |
7490 | records, then we will need to create distinct fixed types for each | |
7491 | element selected. */ | |
7492 | ||
7493 | /* The upshot of all of this is that many routines take a (type, host | |
7494 | address, target address) triple as arguments to represent a value. | |
7495 | The host address, if non-null, is supposed to contain an internal | |
7496 | copy of the relevant data; otherwise, the program is to consult the | |
4c4b4cd2 | 7497 | target at the target address. */ |
14f9c5c9 AS |
7498 | |
7499 | /* Assuming that VAL0 represents a pointer value, the result of | |
7500 | dereferencing it. Differs from value_ind in its treatment of | |
4c4b4cd2 | 7501 | dynamic-sized types. */ |
14f9c5c9 | 7502 | |
d2e4a39e AS |
7503 | struct value * |
7504 | ada_value_ind (struct value *val0) | |
14f9c5c9 | 7505 | { |
c48db5ca | 7506 | struct value *val = value_ind (val0); |
5b4ee69b | 7507 | |
b50d69b5 JG |
7508 | if (ada_is_tagged_type (value_type (val), 0)) |
7509 | val = ada_tag_value_at_base_address (val); | |
7510 | ||
4c4b4cd2 | 7511 | return ada_to_fixed_value (val); |
14f9c5c9 AS |
7512 | } |
7513 | ||
7514 | /* The value resulting from dereferencing any "reference to" | |
4c4b4cd2 PH |
7515 | qualifiers on VAL0. */ |
7516 | ||
d2e4a39e AS |
7517 | static struct value * |
7518 | ada_coerce_ref (struct value *val0) | |
7519 | { | |
78134374 | 7520 | if (value_type (val0)->code () == TYPE_CODE_REF) |
d2e4a39e AS |
7521 | { |
7522 | struct value *val = val0; | |
5b4ee69b | 7523 | |
994b9211 | 7524 | val = coerce_ref (val); |
b50d69b5 JG |
7525 | |
7526 | if (ada_is_tagged_type (value_type (val), 0)) | |
7527 | val = ada_tag_value_at_base_address (val); | |
7528 | ||
4c4b4cd2 | 7529 | return ada_to_fixed_value (val); |
d2e4a39e AS |
7530 | } |
7531 | else | |
14f9c5c9 AS |
7532 | return val0; |
7533 | } | |
7534 | ||
4c4b4cd2 | 7535 | /* Return the bit alignment required for field #F of template type TYPE. */ |
14f9c5c9 AS |
7536 | |
7537 | static unsigned int | |
ebf56fd3 | 7538 | field_alignment (struct type *type, int f) |
14f9c5c9 | 7539 | { |
d2e4a39e | 7540 | const char *name = TYPE_FIELD_NAME (type, f); |
64a1bf19 | 7541 | int len; |
14f9c5c9 AS |
7542 | int align_offset; |
7543 | ||
64a1bf19 JB |
7544 | /* The field name should never be null, unless the debugging information |
7545 | is somehow malformed. In this case, we assume the field does not | |
7546 | require any alignment. */ | |
7547 | if (name == NULL) | |
7548 | return 1; | |
7549 | ||
7550 | len = strlen (name); | |
7551 | ||
4c4b4cd2 PH |
7552 | if (!isdigit (name[len - 1])) |
7553 | return 1; | |
14f9c5c9 | 7554 | |
d2e4a39e | 7555 | if (isdigit (name[len - 2])) |
14f9c5c9 AS |
7556 | align_offset = len - 2; |
7557 | else | |
7558 | align_offset = len - 1; | |
7559 | ||
61012eef | 7560 | if (align_offset < 7 || !startswith (name + align_offset - 6, "___XV")) |
14f9c5c9 AS |
7561 | return TARGET_CHAR_BIT; |
7562 | ||
4c4b4cd2 PH |
7563 | return atoi (name + align_offset) * TARGET_CHAR_BIT; |
7564 | } | |
7565 | ||
852dff6c | 7566 | /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */ |
4c4b4cd2 | 7567 | |
852dff6c JB |
7568 | static struct symbol * |
7569 | ada_find_any_type_symbol (const char *name) | |
4c4b4cd2 PH |
7570 | { |
7571 | struct symbol *sym; | |
7572 | ||
7573 | sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN); | |
4186eb54 | 7574 | if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
4c4b4cd2 PH |
7575 | return sym; |
7576 | ||
4186eb54 KS |
7577 | sym = standard_lookup (name, NULL, STRUCT_DOMAIN); |
7578 | return sym; | |
14f9c5c9 AS |
7579 | } |
7580 | ||
dddfab26 UW |
7581 | /* Find a type named NAME. Ignores ambiguity. This routine will look |
7582 | solely for types defined by debug info, it will not search the GDB | |
7583 | primitive types. */ | |
4c4b4cd2 | 7584 | |
852dff6c | 7585 | static struct type * |
ebf56fd3 | 7586 | ada_find_any_type (const char *name) |
14f9c5c9 | 7587 | { |
852dff6c | 7588 | struct symbol *sym = ada_find_any_type_symbol (name); |
14f9c5c9 | 7589 | |
14f9c5c9 | 7590 | if (sym != NULL) |
dddfab26 | 7591 | return SYMBOL_TYPE (sym); |
14f9c5c9 | 7592 | |
dddfab26 | 7593 | return NULL; |
14f9c5c9 AS |
7594 | } |
7595 | ||
739593e0 JB |
7596 | /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol |
7597 | associated with NAME_SYM's name. NAME_SYM may itself be a renaming | |
7598 | symbol, in which case it is returned. Otherwise, this looks for | |
7599 | symbols whose name is that of NAME_SYM suffixed with "___XR". | |
7600 | Return symbol if found, and NULL otherwise. */ | |
4c4b4cd2 | 7601 | |
c0e70c62 TT |
7602 | static bool |
7603 | ada_is_renaming_symbol (struct symbol *name_sym) | |
aeb5907d | 7604 | { |
987012b8 | 7605 | const char *name = name_sym->linkage_name (); |
c0e70c62 | 7606 | return strstr (name, "___XR") != NULL; |
4c4b4cd2 PH |
7607 | } |
7608 | ||
14f9c5c9 | 7609 | /* Because of GNAT encoding conventions, several GDB symbols may match a |
4c4b4cd2 | 7610 | given type name. If the type denoted by TYPE0 is to be preferred to |
14f9c5c9 | 7611 | that of TYPE1 for purposes of type printing, return non-zero; |
4c4b4cd2 PH |
7612 | otherwise return 0. */ |
7613 | ||
14f9c5c9 | 7614 | int |
d2e4a39e | 7615 | ada_prefer_type (struct type *type0, struct type *type1) |
14f9c5c9 AS |
7616 | { |
7617 | if (type1 == NULL) | |
7618 | return 1; | |
7619 | else if (type0 == NULL) | |
7620 | return 0; | |
78134374 | 7621 | else if (type1->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7622 | return 1; |
78134374 | 7623 | else if (type0->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7624 | return 0; |
7d93a1e0 | 7625 | else if (type1->name () == NULL && type0->name () != NULL) |
4c4b4cd2 | 7626 | return 1; |
ad82864c | 7627 | else if (ada_is_constrained_packed_array_type (type0)) |
14f9c5c9 | 7628 | return 1; |
4c4b4cd2 | 7629 | else if (ada_is_array_descriptor_type (type0) |
dda83cd7 | 7630 | && !ada_is_array_descriptor_type (type1)) |
14f9c5c9 | 7631 | return 1; |
aeb5907d JB |
7632 | else |
7633 | { | |
7d93a1e0 SM |
7634 | const char *type0_name = type0->name (); |
7635 | const char *type1_name = type1->name (); | |
aeb5907d JB |
7636 | |
7637 | if (type0_name != NULL && strstr (type0_name, "___XR") != NULL | |
7638 | && (type1_name == NULL || strstr (type1_name, "___XR") == NULL)) | |
7639 | return 1; | |
7640 | } | |
14f9c5c9 AS |
7641 | return 0; |
7642 | } | |
7643 | ||
e86ca25f TT |
7644 | /* The name of TYPE, which is its TYPE_NAME. Null if TYPE is |
7645 | null. */ | |
4c4b4cd2 | 7646 | |
0d5cff50 | 7647 | const char * |
d2e4a39e | 7648 | ada_type_name (struct type *type) |
14f9c5c9 | 7649 | { |
d2e4a39e | 7650 | if (type == NULL) |
14f9c5c9 | 7651 | return NULL; |
7d93a1e0 | 7652 | return type->name (); |
14f9c5c9 AS |
7653 | } |
7654 | ||
b4ba55a1 JB |
7655 | /* Search the list of "descriptive" types associated to TYPE for a type |
7656 | whose name is NAME. */ | |
7657 | ||
7658 | static struct type * | |
7659 | find_parallel_type_by_descriptive_type (struct type *type, const char *name) | |
7660 | { | |
931e5bc3 | 7661 | struct type *result, *tmp; |
b4ba55a1 | 7662 | |
c6044dd1 JB |
7663 | if (ada_ignore_descriptive_types_p) |
7664 | return NULL; | |
7665 | ||
b4ba55a1 JB |
7666 | /* If there no descriptive-type info, then there is no parallel type |
7667 | to be found. */ | |
7668 | if (!HAVE_GNAT_AUX_INFO (type)) | |
7669 | return NULL; | |
7670 | ||
7671 | result = TYPE_DESCRIPTIVE_TYPE (type); | |
7672 | while (result != NULL) | |
7673 | { | |
0d5cff50 | 7674 | const char *result_name = ada_type_name (result); |
b4ba55a1 JB |
7675 | |
7676 | if (result_name == NULL) | |
dda83cd7 SM |
7677 | { |
7678 | warning (_("unexpected null name on descriptive type")); | |
7679 | return NULL; | |
7680 | } | |
b4ba55a1 JB |
7681 | |
7682 | /* If the names match, stop. */ | |
7683 | if (strcmp (result_name, name) == 0) | |
7684 | break; | |
7685 | ||
7686 | /* Otherwise, look at the next item on the list, if any. */ | |
7687 | if (HAVE_GNAT_AUX_INFO (result)) | |
931e5bc3 JG |
7688 | tmp = TYPE_DESCRIPTIVE_TYPE (result); |
7689 | else | |
7690 | tmp = NULL; | |
7691 | ||
7692 | /* If not found either, try after having resolved the typedef. */ | |
7693 | if (tmp != NULL) | |
7694 | result = tmp; | |
b4ba55a1 | 7695 | else |
931e5bc3 | 7696 | { |
f168693b | 7697 | result = check_typedef (result); |
931e5bc3 JG |
7698 | if (HAVE_GNAT_AUX_INFO (result)) |
7699 | result = TYPE_DESCRIPTIVE_TYPE (result); | |
7700 | else | |
7701 | result = NULL; | |
7702 | } | |
b4ba55a1 JB |
7703 | } |
7704 | ||
7705 | /* If we didn't find a match, see whether this is a packed array. With | |
7706 | older compilers, the descriptive type information is either absent or | |
7707 | irrelevant when it comes to packed arrays so the above lookup fails. | |
7708 | Fall back to using a parallel lookup by name in this case. */ | |
12ab9e09 | 7709 | if (result == NULL && ada_is_constrained_packed_array_type (type)) |
b4ba55a1 JB |
7710 | return ada_find_any_type (name); |
7711 | ||
7712 | return result; | |
7713 | } | |
7714 | ||
7715 | /* Find a parallel type to TYPE with the specified NAME, using the | |
7716 | descriptive type taken from the debugging information, if available, | |
7717 | and otherwise using the (slower) name-based method. */ | |
7718 | ||
7719 | static struct type * | |
7720 | ada_find_parallel_type_with_name (struct type *type, const char *name) | |
7721 | { | |
7722 | struct type *result = NULL; | |
7723 | ||
7724 | if (HAVE_GNAT_AUX_INFO (type)) | |
7725 | result = find_parallel_type_by_descriptive_type (type, name); | |
7726 | else | |
7727 | result = ada_find_any_type (name); | |
7728 | ||
7729 | return result; | |
7730 | } | |
7731 | ||
7732 | /* Same as above, but specify the name of the parallel type by appending | |
4c4b4cd2 | 7733 | SUFFIX to the name of TYPE. */ |
14f9c5c9 | 7734 | |
d2e4a39e | 7735 | struct type * |
ebf56fd3 | 7736 | ada_find_parallel_type (struct type *type, const char *suffix) |
14f9c5c9 | 7737 | { |
0d5cff50 | 7738 | char *name; |
fe978cb0 | 7739 | const char *type_name = ada_type_name (type); |
14f9c5c9 | 7740 | int len; |
d2e4a39e | 7741 | |
fe978cb0 | 7742 | if (type_name == NULL) |
14f9c5c9 AS |
7743 | return NULL; |
7744 | ||
fe978cb0 | 7745 | len = strlen (type_name); |
14f9c5c9 | 7746 | |
b4ba55a1 | 7747 | name = (char *) alloca (len + strlen (suffix) + 1); |
14f9c5c9 | 7748 | |
fe978cb0 | 7749 | strcpy (name, type_name); |
14f9c5c9 AS |
7750 | strcpy (name + len, suffix); |
7751 | ||
b4ba55a1 | 7752 | return ada_find_parallel_type_with_name (type, name); |
14f9c5c9 AS |
7753 | } |
7754 | ||
14f9c5c9 | 7755 | /* If TYPE is a variable-size record type, return the corresponding template |
4c4b4cd2 | 7756 | type describing its fields. Otherwise, return NULL. */ |
14f9c5c9 | 7757 | |
d2e4a39e AS |
7758 | static struct type * |
7759 | dynamic_template_type (struct type *type) | |
14f9c5c9 | 7760 | { |
61ee279c | 7761 | type = ada_check_typedef (type); |
14f9c5c9 | 7762 | |
78134374 | 7763 | if (type == NULL || type->code () != TYPE_CODE_STRUCT |
d2e4a39e | 7764 | || ada_type_name (type) == NULL) |
14f9c5c9 | 7765 | return NULL; |
d2e4a39e | 7766 | else |
14f9c5c9 AS |
7767 | { |
7768 | int len = strlen (ada_type_name (type)); | |
5b4ee69b | 7769 | |
4c4b4cd2 | 7770 | if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0) |
dda83cd7 | 7771 | return type; |
14f9c5c9 | 7772 | else |
dda83cd7 | 7773 | return ada_find_parallel_type (type, "___XVE"); |
14f9c5c9 AS |
7774 | } |
7775 | } | |
7776 | ||
7777 | /* Assuming that TEMPL_TYPE is a union or struct type, returns | |
4c4b4cd2 | 7778 | non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */ |
14f9c5c9 | 7779 | |
d2e4a39e AS |
7780 | static int |
7781 | is_dynamic_field (struct type *templ_type, int field_num) | |
14f9c5c9 AS |
7782 | { |
7783 | const char *name = TYPE_FIELD_NAME (templ_type, field_num); | |
5b4ee69b | 7784 | |
d2e4a39e | 7785 | return name != NULL |
940da03e | 7786 | && templ_type->field (field_num).type ()->code () == TYPE_CODE_PTR |
14f9c5c9 AS |
7787 | && strstr (name, "___XVL") != NULL; |
7788 | } | |
7789 | ||
4c4b4cd2 PH |
7790 | /* The index of the variant field of TYPE, or -1 if TYPE does not |
7791 | represent a variant record type. */ | |
14f9c5c9 | 7792 | |
d2e4a39e | 7793 | static int |
4c4b4cd2 | 7794 | variant_field_index (struct type *type) |
14f9c5c9 AS |
7795 | { |
7796 | int f; | |
7797 | ||
78134374 | 7798 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
4c4b4cd2 PH |
7799 | return -1; |
7800 | ||
1f704f76 | 7801 | for (f = 0; f < type->num_fields (); f += 1) |
4c4b4cd2 PH |
7802 | { |
7803 | if (ada_is_variant_part (type, f)) | |
dda83cd7 | 7804 | return f; |
4c4b4cd2 PH |
7805 | } |
7806 | return -1; | |
14f9c5c9 AS |
7807 | } |
7808 | ||
4c4b4cd2 PH |
7809 | /* A record type with no fields. */ |
7810 | ||
d2e4a39e | 7811 | static struct type * |
fe978cb0 | 7812 | empty_record (struct type *templ) |
14f9c5c9 | 7813 | { |
fe978cb0 | 7814 | struct type *type = alloc_type_copy (templ); |
5b4ee69b | 7815 | |
67607e24 | 7816 | type->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7817 | INIT_NONE_SPECIFIC (type); |
d0e39ea2 | 7818 | type->set_name ("<empty>"); |
14f9c5c9 AS |
7819 | TYPE_LENGTH (type) = 0; |
7820 | return type; | |
7821 | } | |
7822 | ||
7823 | /* An ordinary record type (with fixed-length fields) that describes | |
4c4b4cd2 PH |
7824 | the value of type TYPE at VALADDR or ADDRESS (see comments at |
7825 | the beginning of this section) VAL according to GNAT conventions. | |
7826 | DVAL0 should describe the (portion of a) record that contains any | |
df407dfe | 7827 | necessary discriminants. It should be NULL if value_type (VAL) is |
14f9c5c9 AS |
7828 | an outer-level type (i.e., as opposed to a branch of a variant.) A |
7829 | variant field (unless unchecked) is replaced by a particular branch | |
4c4b4cd2 | 7830 | of the variant. |
14f9c5c9 | 7831 | |
4c4b4cd2 PH |
7832 | If not KEEP_DYNAMIC_FIELDS, then all fields whose position or |
7833 | length are not statically known are discarded. As a consequence, | |
7834 | VALADDR, ADDRESS and DVAL0 are ignored. | |
7835 | ||
7836 | NOTE: Limitations: For now, we assume that dynamic fields and | |
7837 | variants occupy whole numbers of bytes. However, they need not be | |
7838 | byte-aligned. */ | |
7839 | ||
7840 | struct type * | |
10a2c479 | 7841 | ada_template_to_fixed_record_type_1 (struct type *type, |
fc1a4b47 | 7842 | const gdb_byte *valaddr, |
dda83cd7 SM |
7843 | CORE_ADDR address, struct value *dval0, |
7844 | int keep_dynamic_fields) | |
14f9c5c9 | 7845 | { |
d2e4a39e AS |
7846 | struct value *mark = value_mark (); |
7847 | struct value *dval; | |
7848 | struct type *rtype; | |
14f9c5c9 | 7849 | int nfields, bit_len; |
4c4b4cd2 | 7850 | int variant_field; |
14f9c5c9 | 7851 | long off; |
d94e4f4f | 7852 | int fld_bit_len; |
14f9c5c9 AS |
7853 | int f; |
7854 | ||
4c4b4cd2 PH |
7855 | /* Compute the number of fields in this record type that are going |
7856 | to be processed: unless keep_dynamic_fields, this includes only | |
7857 | fields whose position and length are static will be processed. */ | |
7858 | if (keep_dynamic_fields) | |
1f704f76 | 7859 | nfields = type->num_fields (); |
4c4b4cd2 PH |
7860 | else |
7861 | { | |
7862 | nfields = 0; | |
1f704f76 | 7863 | while (nfields < type->num_fields () |
dda83cd7 SM |
7864 | && !ada_is_variant_part (type, nfields) |
7865 | && !is_dynamic_field (type, nfields)) | |
7866 | nfields++; | |
4c4b4cd2 PH |
7867 | } |
7868 | ||
e9bb382b | 7869 | rtype = alloc_type_copy (type); |
67607e24 | 7870 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7871 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 7872 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
7873 | rtype->set_fields |
7874 | ((struct field *) TYPE_ZALLOC (rtype, nfields * sizeof (struct field))); | |
d0e39ea2 | 7875 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 7876 | rtype->set_is_fixed_instance (true); |
14f9c5c9 | 7877 | |
d2e4a39e AS |
7878 | off = 0; |
7879 | bit_len = 0; | |
4c4b4cd2 PH |
7880 | variant_field = -1; |
7881 | ||
14f9c5c9 AS |
7882 | for (f = 0; f < nfields; f += 1) |
7883 | { | |
a89febbd | 7884 | off = align_up (off, field_alignment (type, f)) |
6c038f32 | 7885 | + TYPE_FIELD_BITPOS (type, f); |
ceacbf6e | 7886 | SET_FIELD_BITPOS (rtype->field (f), off); |
d2e4a39e | 7887 | TYPE_FIELD_BITSIZE (rtype, f) = 0; |
14f9c5c9 | 7888 | |
d2e4a39e | 7889 | if (ada_is_variant_part (type, f)) |
dda83cd7 SM |
7890 | { |
7891 | variant_field = f; | |
7892 | fld_bit_len = 0; | |
7893 | } | |
14f9c5c9 | 7894 | else if (is_dynamic_field (type, f)) |
dda83cd7 | 7895 | { |
284614f0 JB |
7896 | const gdb_byte *field_valaddr = valaddr; |
7897 | CORE_ADDR field_address = address; | |
7898 | struct type *field_type = | |
940da03e | 7899 | TYPE_TARGET_TYPE (type->field (f).type ()); |
284614f0 | 7900 | |
dda83cd7 | 7901 | if (dval0 == NULL) |
b5304971 JG |
7902 | { |
7903 | /* rtype's length is computed based on the run-time | |
7904 | value of discriminants. If the discriminants are not | |
7905 | initialized, the type size may be completely bogus and | |
0963b4bd | 7906 | GDB may fail to allocate a value for it. So check the |
b5304971 | 7907 | size first before creating the value. */ |
c1b5a1a6 | 7908 | ada_ensure_varsize_limit (rtype); |
012370f6 TT |
7909 | /* Using plain value_from_contents_and_address here |
7910 | causes problems because we will end up trying to | |
7911 | resolve a type that is currently being | |
7912 | constructed. */ | |
7913 | dval = value_from_contents_and_address_unresolved (rtype, | |
7914 | valaddr, | |
7915 | address); | |
9f1f738a | 7916 | rtype = value_type (dval); |
b5304971 | 7917 | } |
dda83cd7 SM |
7918 | else |
7919 | dval = dval0; | |
4c4b4cd2 | 7920 | |
284614f0 JB |
7921 | /* If the type referenced by this field is an aligner type, we need |
7922 | to unwrap that aligner type, because its size might not be set. | |
7923 | Keeping the aligner type would cause us to compute the wrong | |
7924 | size for this field, impacting the offset of the all the fields | |
7925 | that follow this one. */ | |
7926 | if (ada_is_aligner_type (field_type)) | |
7927 | { | |
7928 | long field_offset = TYPE_FIELD_BITPOS (field_type, f); | |
7929 | ||
7930 | field_valaddr = cond_offset_host (field_valaddr, field_offset); | |
7931 | field_address = cond_offset_target (field_address, field_offset); | |
7932 | field_type = ada_aligned_type (field_type); | |
7933 | } | |
7934 | ||
7935 | field_valaddr = cond_offset_host (field_valaddr, | |
7936 | off / TARGET_CHAR_BIT); | |
7937 | field_address = cond_offset_target (field_address, | |
7938 | off / TARGET_CHAR_BIT); | |
7939 | ||
7940 | /* Get the fixed type of the field. Note that, in this case, | |
7941 | we do not want to get the real type out of the tag: if | |
7942 | the current field is the parent part of a tagged record, | |
7943 | we will get the tag of the object. Clearly wrong: the real | |
7944 | type of the parent is not the real type of the child. We | |
7945 | would end up in an infinite loop. */ | |
7946 | field_type = ada_get_base_type (field_type); | |
7947 | field_type = ada_to_fixed_type (field_type, field_valaddr, | |
7948 | field_address, dval, 0); | |
27f2a97b JB |
7949 | /* If the field size is already larger than the maximum |
7950 | object size, then the record itself will necessarily | |
7951 | be larger than the maximum object size. We need to make | |
7952 | this check now, because the size might be so ridiculously | |
7953 | large (due to an uninitialized variable in the inferior) | |
7954 | that it would cause an overflow when adding it to the | |
7955 | record size. */ | |
c1b5a1a6 | 7956 | ada_ensure_varsize_limit (field_type); |
284614f0 | 7957 | |
5d14b6e5 | 7958 | rtype->field (f).set_type (field_type); |
dda83cd7 | 7959 | TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f); |
27f2a97b JB |
7960 | /* The multiplication can potentially overflow. But because |
7961 | the field length has been size-checked just above, and | |
7962 | assuming that the maximum size is a reasonable value, | |
7963 | an overflow should not happen in practice. So rather than | |
7964 | adding overflow recovery code to this already complex code, | |
7965 | we just assume that it's not going to happen. */ | |
dda83cd7 SM |
7966 | fld_bit_len = |
7967 | TYPE_LENGTH (rtype->field (f).type ()) * TARGET_CHAR_BIT; | |
7968 | } | |
14f9c5c9 | 7969 | else |
dda83cd7 | 7970 | { |
5ded5331 JB |
7971 | /* Note: If this field's type is a typedef, it is important |
7972 | to preserve the typedef layer. | |
7973 | ||
7974 | Otherwise, we might be transforming a typedef to a fat | |
7975 | pointer (encoding a pointer to an unconstrained array), | |
7976 | into a basic fat pointer (encoding an unconstrained | |
7977 | array). As both types are implemented using the same | |
7978 | structure, the typedef is the only clue which allows us | |
7979 | to distinguish between the two options. Stripping it | |
7980 | would prevent us from printing this field appropriately. */ | |
dda83cd7 SM |
7981 | rtype->field (f).set_type (type->field (f).type ()); |
7982 | TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f); | |
7983 | if (TYPE_FIELD_BITSIZE (type, f) > 0) | |
7984 | fld_bit_len = | |
7985 | TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f); | |
7986 | else | |
5ded5331 | 7987 | { |
940da03e | 7988 | struct type *field_type = type->field (f).type (); |
5ded5331 JB |
7989 | |
7990 | /* We need to be careful of typedefs when computing | |
7991 | the length of our field. If this is a typedef, | |
7992 | get the length of the target type, not the length | |
7993 | of the typedef. */ | |
78134374 | 7994 | if (field_type->code () == TYPE_CODE_TYPEDEF) |
5ded5331 JB |
7995 | field_type = ada_typedef_target_type (field_type); |
7996 | ||
dda83cd7 SM |
7997 | fld_bit_len = |
7998 | TYPE_LENGTH (ada_check_typedef (field_type)) * TARGET_CHAR_BIT; | |
5ded5331 | 7999 | } |
dda83cd7 | 8000 | } |
14f9c5c9 | 8001 | if (off + fld_bit_len > bit_len) |
dda83cd7 | 8002 | bit_len = off + fld_bit_len; |
d94e4f4f | 8003 | off += fld_bit_len; |
4c4b4cd2 | 8004 | TYPE_LENGTH (rtype) = |
dda83cd7 | 8005 | align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT; |
14f9c5c9 | 8006 | } |
4c4b4cd2 PH |
8007 | |
8008 | /* We handle the variant part, if any, at the end because of certain | |
b1f33ddd | 8009 | odd cases in which it is re-ordered so as NOT to be the last field of |
4c4b4cd2 PH |
8010 | the record. This can happen in the presence of representation |
8011 | clauses. */ | |
8012 | if (variant_field >= 0) | |
8013 | { | |
8014 | struct type *branch_type; | |
8015 | ||
8016 | off = TYPE_FIELD_BITPOS (rtype, variant_field); | |
8017 | ||
8018 | if (dval0 == NULL) | |
9f1f738a | 8019 | { |
012370f6 TT |
8020 | /* Using plain value_from_contents_and_address here causes |
8021 | problems because we will end up trying to resolve a type | |
8022 | that is currently being constructed. */ | |
8023 | dval = value_from_contents_and_address_unresolved (rtype, valaddr, | |
8024 | address); | |
9f1f738a SA |
8025 | rtype = value_type (dval); |
8026 | } | |
4c4b4cd2 | 8027 | else |
dda83cd7 | 8028 | dval = dval0; |
4c4b4cd2 PH |
8029 | |
8030 | branch_type = | |
dda83cd7 SM |
8031 | to_fixed_variant_branch_type |
8032 | (type->field (variant_field).type (), | |
8033 | cond_offset_host (valaddr, off / TARGET_CHAR_BIT), | |
8034 | cond_offset_target (address, off / TARGET_CHAR_BIT), dval); | |
4c4b4cd2 | 8035 | if (branch_type == NULL) |
dda83cd7 SM |
8036 | { |
8037 | for (f = variant_field + 1; f < rtype->num_fields (); f += 1) | |
8038 | rtype->field (f - 1) = rtype->field (f); | |
5e33d5f4 | 8039 | rtype->set_num_fields (rtype->num_fields () - 1); |
dda83cd7 | 8040 | } |
4c4b4cd2 | 8041 | else |
dda83cd7 SM |
8042 | { |
8043 | rtype->field (variant_field).set_type (branch_type); | |
8044 | TYPE_FIELD_NAME (rtype, variant_field) = "S"; | |
8045 | fld_bit_len = | |
8046 | TYPE_LENGTH (rtype->field (variant_field).type ()) * | |
8047 | TARGET_CHAR_BIT; | |
8048 | if (off + fld_bit_len > bit_len) | |
8049 | bit_len = off + fld_bit_len; | |
8050 | TYPE_LENGTH (rtype) = | |
8051 | align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT; | |
8052 | } | |
4c4b4cd2 PH |
8053 | } |
8054 | ||
714e53ab PH |
8055 | /* According to exp_dbug.ads, the size of TYPE for variable-size records |
8056 | should contain the alignment of that record, which should be a strictly | |
8057 | positive value. If null or negative, then something is wrong, most | |
8058 | probably in the debug info. In that case, we don't round up the size | |
0963b4bd | 8059 | of the resulting type. If this record is not part of another structure, |
714e53ab PH |
8060 | the current RTYPE length might be good enough for our purposes. */ |
8061 | if (TYPE_LENGTH (type) <= 0) | |
8062 | { | |
7d93a1e0 | 8063 | if (rtype->name ()) |
cc1defb1 | 8064 | warning (_("Invalid type size for `%s' detected: %s."), |
7d93a1e0 | 8065 | rtype->name (), pulongest (TYPE_LENGTH (type))); |
323e0a4a | 8066 | else |
cc1defb1 KS |
8067 | warning (_("Invalid type size for <unnamed> detected: %s."), |
8068 | pulongest (TYPE_LENGTH (type))); | |
714e53ab PH |
8069 | } |
8070 | else | |
8071 | { | |
a89febbd TT |
8072 | TYPE_LENGTH (rtype) = align_up (TYPE_LENGTH (rtype), |
8073 | TYPE_LENGTH (type)); | |
714e53ab | 8074 | } |
14f9c5c9 AS |
8075 | |
8076 | value_free_to_mark (mark); | |
d2e4a39e | 8077 | if (TYPE_LENGTH (rtype) > varsize_limit) |
323e0a4a | 8078 | error (_("record type with dynamic size is larger than varsize-limit")); |
14f9c5c9 AS |
8079 | return rtype; |
8080 | } | |
8081 | ||
4c4b4cd2 PH |
8082 | /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS |
8083 | of 1. */ | |
14f9c5c9 | 8084 | |
d2e4a39e | 8085 | static struct type * |
fc1a4b47 | 8086 | template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8087 | CORE_ADDR address, struct value *dval0) |
4c4b4cd2 PH |
8088 | { |
8089 | return ada_template_to_fixed_record_type_1 (type, valaddr, | |
dda83cd7 | 8090 | address, dval0, 1); |
4c4b4cd2 PH |
8091 | } |
8092 | ||
8093 | /* An ordinary record type in which ___XVL-convention fields and | |
8094 | ___XVU- and ___XVN-convention field types in TYPE0 are replaced with | |
8095 | static approximations, containing all possible fields. Uses | |
8096 | no runtime values. Useless for use in values, but that's OK, | |
8097 | since the results are used only for type determinations. Works on both | |
8098 | structs and unions. Representation note: to save space, we memorize | |
8099 | the result of this function in the TYPE_TARGET_TYPE of the | |
8100 | template type. */ | |
8101 | ||
8102 | static struct type * | |
8103 | template_to_static_fixed_type (struct type *type0) | |
14f9c5c9 AS |
8104 | { |
8105 | struct type *type; | |
8106 | int nfields; | |
8107 | int f; | |
8108 | ||
9e195661 | 8109 | /* No need no do anything if the input type is already fixed. */ |
22c4c60c | 8110 | if (type0->is_fixed_instance ()) |
9e195661 PMR |
8111 | return type0; |
8112 | ||
8113 | /* Likewise if we already have computed the static approximation. */ | |
4c4b4cd2 PH |
8114 | if (TYPE_TARGET_TYPE (type0) != NULL) |
8115 | return TYPE_TARGET_TYPE (type0); | |
8116 | ||
9e195661 | 8117 | /* Don't clone TYPE0 until we are sure we are going to need a copy. */ |
4c4b4cd2 | 8118 | type = type0; |
1f704f76 | 8119 | nfields = type0->num_fields (); |
9e195661 PMR |
8120 | |
8121 | /* Whether or not we cloned TYPE0, cache the result so that we don't do | |
8122 | recompute all over next time. */ | |
8123 | TYPE_TARGET_TYPE (type0) = type; | |
14f9c5c9 AS |
8124 | |
8125 | for (f = 0; f < nfields; f += 1) | |
8126 | { | |
940da03e | 8127 | struct type *field_type = type0->field (f).type (); |
4c4b4cd2 | 8128 | struct type *new_type; |
14f9c5c9 | 8129 | |
4c4b4cd2 | 8130 | if (is_dynamic_field (type0, f)) |
460efde1 JB |
8131 | { |
8132 | field_type = ada_check_typedef (field_type); | |
dda83cd7 | 8133 | new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type)); |
460efde1 | 8134 | } |
14f9c5c9 | 8135 | else |
dda83cd7 | 8136 | new_type = static_unwrap_type (field_type); |
9e195661 PMR |
8137 | |
8138 | if (new_type != field_type) | |
8139 | { | |
8140 | /* Clone TYPE0 only the first time we get a new field type. */ | |
8141 | if (type == type0) | |
8142 | { | |
8143 | TYPE_TARGET_TYPE (type0) = type = alloc_type_copy (type0); | |
78134374 | 8144 | type->set_code (type0->code ()); |
8ecb59f8 | 8145 | INIT_NONE_SPECIFIC (type); |
5e33d5f4 | 8146 | type->set_num_fields (nfields); |
3cabb6b0 SM |
8147 | |
8148 | field *fields = | |
8149 | ((struct field *) | |
8150 | TYPE_ALLOC (type, nfields * sizeof (struct field))); | |
80fc5e77 | 8151 | memcpy (fields, type0->fields (), |
9e195661 | 8152 | sizeof (struct field) * nfields); |
3cabb6b0 SM |
8153 | type->set_fields (fields); |
8154 | ||
d0e39ea2 | 8155 | type->set_name (ada_type_name (type0)); |
9cdd0d12 | 8156 | type->set_is_fixed_instance (true); |
9e195661 PMR |
8157 | TYPE_LENGTH (type) = 0; |
8158 | } | |
5d14b6e5 | 8159 | type->field (f).set_type (new_type); |
9e195661 PMR |
8160 | TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f); |
8161 | } | |
14f9c5c9 | 8162 | } |
9e195661 | 8163 | |
14f9c5c9 AS |
8164 | return type; |
8165 | } | |
8166 | ||
4c4b4cd2 | 8167 | /* Given an object of type TYPE whose contents are at VALADDR and |
5823c3ef JB |
8168 | whose address in memory is ADDRESS, returns a revision of TYPE, |
8169 | which should be a non-dynamic-sized record, in which the variant | |
8170 | part, if any, is replaced with the appropriate branch. Looks | |
4c4b4cd2 PH |
8171 | for discriminant values in DVAL0, which can be NULL if the record |
8172 | contains the necessary discriminant values. */ | |
8173 | ||
d2e4a39e | 8174 | static struct type * |
fc1a4b47 | 8175 | to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8176 | CORE_ADDR address, struct value *dval0) |
14f9c5c9 | 8177 | { |
d2e4a39e | 8178 | struct value *mark = value_mark (); |
4c4b4cd2 | 8179 | struct value *dval; |
d2e4a39e | 8180 | struct type *rtype; |
14f9c5c9 | 8181 | struct type *branch_type; |
1f704f76 | 8182 | int nfields = type->num_fields (); |
4c4b4cd2 | 8183 | int variant_field = variant_field_index (type); |
14f9c5c9 | 8184 | |
4c4b4cd2 | 8185 | if (variant_field == -1) |
14f9c5c9 AS |
8186 | return type; |
8187 | ||
4c4b4cd2 | 8188 | if (dval0 == NULL) |
9f1f738a SA |
8189 | { |
8190 | dval = value_from_contents_and_address (type, valaddr, address); | |
8191 | type = value_type (dval); | |
8192 | } | |
4c4b4cd2 PH |
8193 | else |
8194 | dval = dval0; | |
8195 | ||
e9bb382b | 8196 | rtype = alloc_type_copy (type); |
67607e24 | 8197 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 8198 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 8199 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
8200 | |
8201 | field *fields = | |
d2e4a39e | 8202 | (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field)); |
80fc5e77 | 8203 | memcpy (fields, type->fields (), sizeof (struct field) * nfields); |
3cabb6b0 SM |
8204 | rtype->set_fields (fields); |
8205 | ||
d0e39ea2 | 8206 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 8207 | rtype->set_is_fixed_instance (true); |
14f9c5c9 AS |
8208 | TYPE_LENGTH (rtype) = TYPE_LENGTH (type); |
8209 | ||
4c4b4cd2 | 8210 | branch_type = to_fixed_variant_branch_type |
940da03e | 8211 | (type->field (variant_field).type (), |
d2e4a39e | 8212 | cond_offset_host (valaddr, |
dda83cd7 SM |
8213 | TYPE_FIELD_BITPOS (type, variant_field) |
8214 | / TARGET_CHAR_BIT), | |
d2e4a39e | 8215 | cond_offset_target (address, |
dda83cd7 SM |
8216 | TYPE_FIELD_BITPOS (type, variant_field) |
8217 | / TARGET_CHAR_BIT), dval); | |
d2e4a39e | 8218 | if (branch_type == NULL) |
14f9c5c9 | 8219 | { |
4c4b4cd2 | 8220 | int f; |
5b4ee69b | 8221 | |
4c4b4cd2 | 8222 | for (f = variant_field + 1; f < nfields; f += 1) |
dda83cd7 | 8223 | rtype->field (f - 1) = rtype->field (f); |
5e33d5f4 | 8224 | rtype->set_num_fields (rtype->num_fields () - 1); |
14f9c5c9 AS |
8225 | } |
8226 | else | |
8227 | { | |
5d14b6e5 | 8228 | rtype->field (variant_field).set_type (branch_type); |
4c4b4cd2 PH |
8229 | TYPE_FIELD_NAME (rtype, variant_field) = "S"; |
8230 | TYPE_FIELD_BITSIZE (rtype, variant_field) = 0; | |
14f9c5c9 | 8231 | TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type); |
14f9c5c9 | 8232 | } |
940da03e | 8233 | TYPE_LENGTH (rtype) -= TYPE_LENGTH (type->field (variant_field).type ()); |
d2e4a39e | 8234 | |
4c4b4cd2 | 8235 | value_free_to_mark (mark); |
14f9c5c9 AS |
8236 | return rtype; |
8237 | } | |
8238 | ||
8239 | /* An ordinary record type (with fixed-length fields) that describes | |
8240 | the value at (TYPE0, VALADDR, ADDRESS) [see explanation at | |
8241 | beginning of this section]. Any necessary discriminants' values | |
4c4b4cd2 PH |
8242 | should be in DVAL, a record value; it may be NULL if the object |
8243 | at ADDR itself contains any necessary discriminant values. | |
8244 | Additionally, VALADDR and ADDRESS may also be NULL if no discriminant | |
8245 | values from the record are needed. Except in the case that DVAL, | |
8246 | VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless | |
8247 | unchecked) is replaced by a particular branch of the variant. | |
8248 | ||
8249 | NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0 | |
8250 | is questionable and may be removed. It can arise during the | |
8251 | processing of an unconstrained-array-of-record type where all the | |
8252 | variant branches have exactly the same size. This is because in | |
8253 | such cases, the compiler does not bother to use the XVS convention | |
8254 | when encoding the record. I am currently dubious of this | |
8255 | shortcut and suspect the compiler should be altered. FIXME. */ | |
14f9c5c9 | 8256 | |
d2e4a39e | 8257 | static struct type * |
fc1a4b47 | 8258 | to_fixed_record_type (struct type *type0, const gdb_byte *valaddr, |
dda83cd7 | 8259 | CORE_ADDR address, struct value *dval) |
14f9c5c9 | 8260 | { |
d2e4a39e | 8261 | struct type *templ_type; |
14f9c5c9 | 8262 | |
22c4c60c | 8263 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8264 | return type0; |
8265 | ||
d2e4a39e | 8266 | templ_type = dynamic_template_type (type0); |
14f9c5c9 AS |
8267 | |
8268 | if (templ_type != NULL) | |
8269 | return template_to_fixed_record_type (templ_type, valaddr, address, dval); | |
4c4b4cd2 PH |
8270 | else if (variant_field_index (type0) >= 0) |
8271 | { | |
8272 | if (dval == NULL && valaddr == NULL && address == 0) | |
dda83cd7 | 8273 | return type0; |
4c4b4cd2 | 8274 | return to_record_with_fixed_variant_part (type0, valaddr, address, |
dda83cd7 | 8275 | dval); |
4c4b4cd2 | 8276 | } |
14f9c5c9 AS |
8277 | else |
8278 | { | |
9cdd0d12 | 8279 | type0->set_is_fixed_instance (true); |
14f9c5c9 AS |
8280 | return type0; |
8281 | } | |
8282 | ||
8283 | } | |
8284 | ||
8285 | /* An ordinary record type (with fixed-length fields) that describes | |
8286 | the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a | |
8287 | union type. Any necessary discriminants' values should be in DVAL, | |
8288 | a record value. That is, this routine selects the appropriate | |
8289 | branch of the union at ADDR according to the discriminant value | |
b1f33ddd | 8290 | indicated in the union's type name. Returns VAR_TYPE0 itself if |
0963b4bd | 8291 | it represents a variant subject to a pragma Unchecked_Union. */ |
14f9c5c9 | 8292 | |
d2e4a39e | 8293 | static struct type * |
fc1a4b47 | 8294 | to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr, |
dda83cd7 | 8295 | CORE_ADDR address, struct value *dval) |
14f9c5c9 AS |
8296 | { |
8297 | int which; | |
d2e4a39e AS |
8298 | struct type *templ_type; |
8299 | struct type *var_type; | |
14f9c5c9 | 8300 | |
78134374 | 8301 | if (var_type0->code () == TYPE_CODE_PTR) |
14f9c5c9 | 8302 | var_type = TYPE_TARGET_TYPE (var_type0); |
d2e4a39e | 8303 | else |
14f9c5c9 AS |
8304 | var_type = var_type0; |
8305 | ||
8306 | templ_type = ada_find_parallel_type (var_type, "___XVU"); | |
8307 | ||
8308 | if (templ_type != NULL) | |
8309 | var_type = templ_type; | |
8310 | ||
b1f33ddd JB |
8311 | if (is_unchecked_variant (var_type, value_type (dval))) |
8312 | return var_type0; | |
d8af9068 | 8313 | which = ada_which_variant_applies (var_type, dval); |
14f9c5c9 AS |
8314 | |
8315 | if (which < 0) | |
e9bb382b | 8316 | return empty_record (var_type); |
14f9c5c9 | 8317 | else if (is_dynamic_field (var_type, which)) |
4c4b4cd2 | 8318 | return to_fixed_record_type |
940da03e | 8319 | (TYPE_TARGET_TYPE (var_type->field (which).type ()), |
d2e4a39e | 8320 | valaddr, address, dval); |
940da03e | 8321 | else if (variant_field_index (var_type->field (which).type ()) >= 0) |
d2e4a39e AS |
8322 | return |
8323 | to_fixed_record_type | |
940da03e | 8324 | (var_type->field (which).type (), valaddr, address, dval); |
14f9c5c9 | 8325 | else |
940da03e | 8326 | return var_type->field (which).type (); |
14f9c5c9 AS |
8327 | } |
8328 | ||
8908fca5 JB |
8329 | /* Assuming RANGE_TYPE is a TYPE_CODE_RANGE, return nonzero if |
8330 | ENCODING_TYPE, a type following the GNAT conventions for discrete | |
8331 | type encodings, only carries redundant information. */ | |
8332 | ||
8333 | static int | |
8334 | ada_is_redundant_range_encoding (struct type *range_type, | |
8335 | struct type *encoding_type) | |
8336 | { | |
108d56a4 | 8337 | const char *bounds_str; |
8908fca5 JB |
8338 | int n; |
8339 | LONGEST lo, hi; | |
8340 | ||
78134374 | 8341 | gdb_assert (range_type->code () == TYPE_CODE_RANGE); |
8908fca5 | 8342 | |
78134374 SM |
8343 | if (get_base_type (range_type)->code () |
8344 | != get_base_type (encoding_type)->code ()) | |
005e2509 JB |
8345 | { |
8346 | /* The compiler probably used a simple base type to describe | |
8347 | the range type instead of the range's actual base type, | |
8348 | expecting us to get the real base type from the encoding | |
8349 | anyway. In this situation, the encoding cannot be ignored | |
8350 | as redundant. */ | |
8351 | return 0; | |
8352 | } | |
8353 | ||
8908fca5 JB |
8354 | if (is_dynamic_type (range_type)) |
8355 | return 0; | |
8356 | ||
7d93a1e0 | 8357 | if (encoding_type->name () == NULL) |
8908fca5 JB |
8358 | return 0; |
8359 | ||
7d93a1e0 | 8360 | bounds_str = strstr (encoding_type->name (), "___XDLU_"); |
8908fca5 JB |
8361 | if (bounds_str == NULL) |
8362 | return 0; | |
8363 | ||
8364 | n = 8; /* Skip "___XDLU_". */ | |
8365 | if (!ada_scan_number (bounds_str, n, &lo, &n)) | |
8366 | return 0; | |
5537ddd0 | 8367 | if (range_type->bounds ()->low.const_val () != lo) |
8908fca5 JB |
8368 | return 0; |
8369 | ||
8370 | n += 2; /* Skip the "__" separator between the two bounds. */ | |
8371 | if (!ada_scan_number (bounds_str, n, &hi, &n)) | |
8372 | return 0; | |
5537ddd0 | 8373 | if (range_type->bounds ()->high.const_val () != hi) |
8908fca5 JB |
8374 | return 0; |
8375 | ||
8376 | return 1; | |
8377 | } | |
8378 | ||
8379 | /* Given the array type ARRAY_TYPE, return nonzero if DESC_TYPE, | |
8380 | a type following the GNAT encoding for describing array type | |
8381 | indices, only carries redundant information. */ | |
8382 | ||
8383 | static int | |
8384 | ada_is_redundant_index_type_desc (struct type *array_type, | |
8385 | struct type *desc_type) | |
8386 | { | |
8387 | struct type *this_layer = check_typedef (array_type); | |
8388 | int i; | |
8389 | ||
1f704f76 | 8390 | for (i = 0; i < desc_type->num_fields (); i++) |
8908fca5 | 8391 | { |
3d967001 | 8392 | if (!ada_is_redundant_range_encoding (this_layer->index_type (), |
940da03e | 8393 | desc_type->field (i).type ())) |
8908fca5 JB |
8394 | return 0; |
8395 | this_layer = check_typedef (TYPE_TARGET_TYPE (this_layer)); | |
8396 | } | |
8397 | ||
8398 | return 1; | |
8399 | } | |
8400 | ||
14f9c5c9 AS |
8401 | /* Assuming that TYPE0 is an array type describing the type of a value |
8402 | at ADDR, and that DVAL describes a record containing any | |
8403 | discriminants used in TYPE0, returns a type for the value that | |
8404 | contains no dynamic components (that is, no components whose sizes | |
8405 | are determined by run-time quantities). Unless IGNORE_TOO_BIG is | |
8406 | true, gives an error message if the resulting type's size is over | |
4c4b4cd2 | 8407 | varsize_limit. */ |
14f9c5c9 | 8408 | |
d2e4a39e AS |
8409 | static struct type * |
8410 | to_fixed_array_type (struct type *type0, struct value *dval, | |
dda83cd7 | 8411 | int ignore_too_big) |
14f9c5c9 | 8412 | { |
d2e4a39e AS |
8413 | struct type *index_type_desc; |
8414 | struct type *result; | |
ad82864c | 8415 | int constrained_packed_array_p; |
931e5bc3 | 8416 | static const char *xa_suffix = "___XA"; |
14f9c5c9 | 8417 | |
b0dd7688 | 8418 | type0 = ada_check_typedef (type0); |
22c4c60c | 8419 | if (type0->is_fixed_instance ()) |
4c4b4cd2 | 8420 | return type0; |
14f9c5c9 | 8421 | |
ad82864c JB |
8422 | constrained_packed_array_p = ada_is_constrained_packed_array_type (type0); |
8423 | if (constrained_packed_array_p) | |
75fd6a26 TT |
8424 | { |
8425 | type0 = decode_constrained_packed_array_type (type0); | |
8426 | if (type0 == nullptr) | |
8427 | error (_("could not decode constrained packed array type")); | |
8428 | } | |
284614f0 | 8429 | |
931e5bc3 JG |
8430 | index_type_desc = ada_find_parallel_type (type0, xa_suffix); |
8431 | ||
8432 | /* As mentioned in exp_dbug.ads, for non bit-packed arrays an | |
8433 | encoding suffixed with 'P' may still be generated. If so, | |
8434 | it should be used to find the XA type. */ | |
8435 | ||
8436 | if (index_type_desc == NULL) | |
8437 | { | |
1da0522e | 8438 | const char *type_name = ada_type_name (type0); |
931e5bc3 | 8439 | |
1da0522e | 8440 | if (type_name != NULL) |
931e5bc3 | 8441 | { |
1da0522e | 8442 | const int len = strlen (type_name); |
931e5bc3 JG |
8443 | char *name = (char *) alloca (len + strlen (xa_suffix)); |
8444 | ||
1da0522e | 8445 | if (type_name[len - 1] == 'P') |
931e5bc3 | 8446 | { |
1da0522e | 8447 | strcpy (name, type_name); |
931e5bc3 JG |
8448 | strcpy (name + len - 1, xa_suffix); |
8449 | index_type_desc = ada_find_parallel_type_with_name (type0, name); | |
8450 | } | |
8451 | } | |
8452 | } | |
8453 | ||
28c85d6c | 8454 | ada_fixup_array_indexes_type (index_type_desc); |
8908fca5 JB |
8455 | if (index_type_desc != NULL |
8456 | && ada_is_redundant_index_type_desc (type0, index_type_desc)) | |
8457 | { | |
8458 | /* Ignore this ___XA parallel type, as it does not bring any | |
8459 | useful information. This allows us to avoid creating fixed | |
8460 | versions of the array's index types, which would be identical | |
8461 | to the original ones. This, in turn, can also help avoid | |
8462 | the creation of fixed versions of the array itself. */ | |
8463 | index_type_desc = NULL; | |
8464 | } | |
8465 | ||
14f9c5c9 AS |
8466 | if (index_type_desc == NULL) |
8467 | { | |
61ee279c | 8468 | struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0)); |
5b4ee69b | 8469 | |
14f9c5c9 | 8470 | /* NOTE: elt_type---the fixed version of elt_type0---should never |
dda83cd7 SM |
8471 | depend on the contents of the array in properly constructed |
8472 | debugging data. */ | |
529cad9c | 8473 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8474 | We're not providing the address of an element here, |
8475 | and thus the actual object value cannot be inspected to do | |
8476 | the conversion. This should not be a problem, since arrays of | |
8477 | unconstrained objects are not allowed. In particular, all | |
8478 | the elements of an array of a tagged type should all be of | |
8479 | the same type specified in the debugging info. No need to | |
8480 | consult the object tag. */ | |
1ed6ede0 | 8481 | struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1); |
14f9c5c9 | 8482 | |
284614f0 JB |
8483 | /* Make sure we always create a new array type when dealing with |
8484 | packed array types, since we're going to fix-up the array | |
8485 | type length and element bitsize a little further down. */ | |
ad82864c | 8486 | if (elt_type0 == elt_type && !constrained_packed_array_p) |
dda83cd7 | 8487 | result = type0; |
14f9c5c9 | 8488 | else |
dda83cd7 SM |
8489 | result = create_array_type (alloc_type_copy (type0), |
8490 | elt_type, type0->index_type ()); | |
14f9c5c9 AS |
8491 | } |
8492 | else | |
8493 | { | |
8494 | int i; | |
8495 | struct type *elt_type0; | |
8496 | ||
8497 | elt_type0 = type0; | |
1f704f76 | 8498 | for (i = index_type_desc->num_fields (); i > 0; i -= 1) |
dda83cd7 | 8499 | elt_type0 = TYPE_TARGET_TYPE (elt_type0); |
14f9c5c9 AS |
8500 | |
8501 | /* NOTE: result---the fixed version of elt_type0---should never | |
dda83cd7 SM |
8502 | depend on the contents of the array in properly constructed |
8503 | debugging data. */ | |
529cad9c | 8504 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8505 | We're not providing the address of an element here, |
8506 | and thus the actual object value cannot be inspected to do | |
8507 | the conversion. This should not be a problem, since arrays of | |
8508 | unconstrained objects are not allowed. In particular, all | |
8509 | the elements of an array of a tagged type should all be of | |
8510 | the same type specified in the debugging info. No need to | |
8511 | consult the object tag. */ | |
1ed6ede0 | 8512 | result = |
dda83cd7 | 8513 | ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1); |
1ce677a4 UW |
8514 | |
8515 | elt_type0 = type0; | |
1f704f76 | 8516 | for (i = index_type_desc->num_fields () - 1; i >= 0; i -= 1) |
dda83cd7 SM |
8517 | { |
8518 | struct type *range_type = | |
8519 | to_fixed_range_type (index_type_desc->field (i).type (), dval); | |
5b4ee69b | 8520 | |
dda83cd7 SM |
8521 | result = create_array_type (alloc_type_copy (elt_type0), |
8522 | result, range_type); | |
1ce677a4 | 8523 | elt_type0 = TYPE_TARGET_TYPE (elt_type0); |
dda83cd7 | 8524 | } |
d2e4a39e | 8525 | if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit) |
dda83cd7 | 8526 | error (_("array type with dynamic size is larger than varsize-limit")); |
14f9c5c9 AS |
8527 | } |
8528 | ||
2e6fda7d JB |
8529 | /* We want to preserve the type name. This can be useful when |
8530 | trying to get the type name of a value that has already been | |
8531 | printed (for instance, if the user did "print VAR; whatis $". */ | |
7d93a1e0 | 8532 | result->set_name (type0->name ()); |
2e6fda7d | 8533 | |
ad82864c | 8534 | if (constrained_packed_array_p) |
284614f0 JB |
8535 | { |
8536 | /* So far, the resulting type has been created as if the original | |
8537 | type was a regular (non-packed) array type. As a result, the | |
8538 | bitsize of the array elements needs to be set again, and the array | |
8539 | length needs to be recomputed based on that bitsize. */ | |
8540 | int len = TYPE_LENGTH (result) / TYPE_LENGTH (TYPE_TARGET_TYPE (result)); | |
8541 | int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0); | |
8542 | ||
8543 | TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0); | |
8544 | TYPE_LENGTH (result) = len * elt_bitsize / HOST_CHAR_BIT; | |
8545 | if (TYPE_LENGTH (result) * HOST_CHAR_BIT < len * elt_bitsize) | |
dda83cd7 | 8546 | TYPE_LENGTH (result)++; |
284614f0 JB |
8547 | } |
8548 | ||
9cdd0d12 | 8549 | result->set_is_fixed_instance (true); |
14f9c5c9 | 8550 | return result; |
d2e4a39e | 8551 | } |
14f9c5c9 AS |
8552 | |
8553 | ||
8554 | /* A standard type (containing no dynamically sized components) | |
8555 | corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS) | |
8556 | DVAL describes a record containing any discriminants used in TYPE0, | |
4c4b4cd2 | 8557 | and may be NULL if there are none, or if the object of type TYPE at |
529cad9c PH |
8558 | ADDRESS or in VALADDR contains these discriminants. |
8559 | ||
1ed6ede0 JB |
8560 | If CHECK_TAG is not null, in the case of tagged types, this function |
8561 | attempts to locate the object's tag and use it to compute the actual | |
8562 | type. However, when ADDRESS is null, we cannot use it to determine the | |
8563 | location of the tag, and therefore compute the tagged type's actual type. | |
8564 | So we return the tagged type without consulting the tag. */ | |
529cad9c | 8565 | |
f192137b JB |
8566 | static struct type * |
8567 | ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8568 | CORE_ADDR address, struct value *dval, int check_tag) |
14f9c5c9 | 8569 | { |
61ee279c | 8570 | type = ada_check_typedef (type); |
8ecb59f8 TT |
8571 | |
8572 | /* Only un-fixed types need to be handled here. */ | |
8573 | if (!HAVE_GNAT_AUX_INFO (type)) | |
8574 | return type; | |
8575 | ||
78134374 | 8576 | switch (type->code ()) |
d2e4a39e AS |
8577 | { |
8578 | default: | |
14f9c5c9 | 8579 | return type; |
d2e4a39e | 8580 | case TYPE_CODE_STRUCT: |
4c4b4cd2 | 8581 | { |
dda83cd7 SM |
8582 | struct type *static_type = to_static_fixed_type (type); |
8583 | struct type *fixed_record_type = | |
8584 | to_fixed_record_type (type, valaddr, address, NULL); | |
8585 | ||
8586 | /* If STATIC_TYPE is a tagged type and we know the object's address, | |
8587 | then we can determine its tag, and compute the object's actual | |
8588 | type from there. Note that we have to use the fixed record | |
8589 | type (the parent part of the record may have dynamic fields | |
8590 | and the way the location of _tag is expressed may depend on | |
8591 | them). */ | |
8592 | ||
8593 | if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0)) | |
8594 | { | |
b50d69b5 JG |
8595 | struct value *tag = |
8596 | value_tag_from_contents_and_address | |
8597 | (fixed_record_type, | |
8598 | valaddr, | |
8599 | address); | |
8600 | struct type *real_type = type_from_tag (tag); | |
8601 | struct value *obj = | |
8602 | value_from_contents_and_address (fixed_record_type, | |
8603 | valaddr, | |
8604 | address); | |
dda83cd7 SM |
8605 | fixed_record_type = value_type (obj); |
8606 | if (real_type != NULL) | |
8607 | return to_fixed_record_type | |
b50d69b5 JG |
8608 | (real_type, NULL, |
8609 | value_address (ada_tag_value_at_base_address (obj)), NULL); | |
dda83cd7 SM |
8610 | } |
8611 | ||
8612 | /* Check to see if there is a parallel ___XVZ variable. | |
8613 | If there is, then it provides the actual size of our type. */ | |
8614 | else if (ada_type_name (fixed_record_type) != NULL) | |
8615 | { | |
8616 | const char *name = ada_type_name (fixed_record_type); | |
8617 | char *xvz_name | |
224c3ddb | 8618 | = (char *) alloca (strlen (name) + 7 /* "___XVZ\0" */); |
eccab96d | 8619 | bool xvz_found = false; |
dda83cd7 | 8620 | LONGEST size; |
4af88198 | 8621 | |
dda83cd7 | 8622 | xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name); |
a70b8144 | 8623 | try |
eccab96d JB |
8624 | { |
8625 | xvz_found = get_int_var_value (xvz_name, size); | |
8626 | } | |
230d2906 | 8627 | catch (const gdb_exception_error &except) |
eccab96d JB |
8628 | { |
8629 | /* We found the variable, but somehow failed to read | |
8630 | its value. Rethrow the same error, but with a little | |
8631 | bit more information, to help the user understand | |
8632 | what went wrong (Eg: the variable might have been | |
8633 | optimized out). */ | |
8634 | throw_error (except.error, | |
8635 | _("unable to read value of %s (%s)"), | |
3d6e9d23 | 8636 | xvz_name, except.what ()); |
eccab96d | 8637 | } |
eccab96d | 8638 | |
dda83cd7 SM |
8639 | if (xvz_found && TYPE_LENGTH (fixed_record_type) != size) |
8640 | { | |
8641 | fixed_record_type = copy_type (fixed_record_type); | |
8642 | TYPE_LENGTH (fixed_record_type) = size; | |
8643 | ||
8644 | /* The FIXED_RECORD_TYPE may have be a stub. We have | |
8645 | observed this when the debugging info is STABS, and | |
8646 | apparently it is something that is hard to fix. | |
8647 | ||
8648 | In practice, we don't need the actual type definition | |
8649 | at all, because the presence of the XVZ variable allows us | |
8650 | to assume that there must be a XVS type as well, which we | |
8651 | should be able to use later, when we need the actual type | |
8652 | definition. | |
8653 | ||
8654 | In the meantime, pretend that the "fixed" type we are | |
8655 | returning is NOT a stub, because this can cause trouble | |
8656 | when using this type to create new types targeting it. | |
8657 | Indeed, the associated creation routines often check | |
8658 | whether the target type is a stub and will try to replace | |
8659 | it, thus using a type with the wrong size. This, in turn, | |
8660 | might cause the new type to have the wrong size too. | |
8661 | Consider the case of an array, for instance, where the size | |
8662 | of the array is computed from the number of elements in | |
8663 | our array multiplied by the size of its element. */ | |
b4b73759 | 8664 | fixed_record_type->set_is_stub (false); |
dda83cd7 SM |
8665 | } |
8666 | } | |
8667 | return fixed_record_type; | |
4c4b4cd2 | 8668 | } |
d2e4a39e | 8669 | case TYPE_CODE_ARRAY: |
4c4b4cd2 | 8670 | return to_fixed_array_type (type, dval, 1); |
d2e4a39e AS |
8671 | case TYPE_CODE_UNION: |
8672 | if (dval == NULL) | |
dda83cd7 | 8673 | return type; |
d2e4a39e | 8674 | else |
dda83cd7 | 8675 | return to_fixed_variant_branch_type (type, valaddr, address, dval); |
d2e4a39e | 8676 | } |
14f9c5c9 AS |
8677 | } |
8678 | ||
f192137b JB |
8679 | /* The same as ada_to_fixed_type_1, except that it preserves the type |
8680 | if it is a TYPE_CODE_TYPEDEF of a type that is already fixed. | |
96dbd2c1 JB |
8681 | |
8682 | The typedef layer needs be preserved in order to differentiate between | |
8683 | arrays and array pointers when both types are implemented using the same | |
8684 | fat pointer. In the array pointer case, the pointer is encoded as | |
8685 | a typedef of the pointer type. For instance, considering: | |
8686 | ||
8687 | type String_Access is access String; | |
8688 | S1 : String_Access := null; | |
8689 | ||
8690 | To the debugger, S1 is defined as a typedef of type String. But | |
8691 | to the user, it is a pointer. So if the user tries to print S1, | |
8692 | we should not dereference the array, but print the array address | |
8693 | instead. | |
8694 | ||
8695 | If we didn't preserve the typedef layer, we would lose the fact that | |
8696 | the type is to be presented as a pointer (needs de-reference before | |
8697 | being printed). And we would also use the source-level type name. */ | |
f192137b JB |
8698 | |
8699 | struct type * | |
8700 | ada_to_fixed_type (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8701 | CORE_ADDR address, struct value *dval, int check_tag) |
f192137b JB |
8702 | |
8703 | { | |
8704 | struct type *fixed_type = | |
8705 | ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag); | |
8706 | ||
96dbd2c1 JB |
8707 | /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE, |
8708 | then preserve the typedef layer. | |
8709 | ||
8710 | Implementation note: We can only check the main-type portion of | |
8711 | the TYPE and FIXED_TYPE, because eliminating the typedef layer | |
8712 | from TYPE now returns a type that has the same instance flags | |
8713 | as TYPE. For instance, if TYPE is a "typedef const", and its | |
8714 | target type is a "struct", then the typedef elimination will return | |
8715 | a "const" version of the target type. See check_typedef for more | |
8716 | details about how the typedef layer elimination is done. | |
8717 | ||
8718 | brobecker/2010-11-19: It seems to me that the only case where it is | |
8719 | useful to preserve the typedef layer is when dealing with fat pointers. | |
8720 | Perhaps, we could add a check for that and preserve the typedef layer | |
85102364 | 8721 | only in that situation. But this seems unnecessary so far, probably |
96dbd2c1 JB |
8722 | because we call check_typedef/ada_check_typedef pretty much everywhere. |
8723 | */ | |
78134374 | 8724 | if (type->code () == TYPE_CODE_TYPEDEF |
720d1a40 | 8725 | && (TYPE_MAIN_TYPE (ada_typedef_target_type (type)) |
96dbd2c1 | 8726 | == TYPE_MAIN_TYPE (fixed_type))) |
f192137b JB |
8727 | return type; |
8728 | ||
8729 | return fixed_type; | |
8730 | } | |
8731 | ||
14f9c5c9 | 8732 | /* A standard (static-sized) type corresponding as well as possible to |
4c4b4cd2 | 8733 | TYPE0, but based on no runtime data. */ |
14f9c5c9 | 8734 | |
d2e4a39e AS |
8735 | static struct type * |
8736 | to_static_fixed_type (struct type *type0) | |
14f9c5c9 | 8737 | { |
d2e4a39e | 8738 | struct type *type; |
14f9c5c9 AS |
8739 | |
8740 | if (type0 == NULL) | |
8741 | return NULL; | |
8742 | ||
22c4c60c | 8743 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8744 | return type0; |
8745 | ||
61ee279c | 8746 | type0 = ada_check_typedef (type0); |
d2e4a39e | 8747 | |
78134374 | 8748 | switch (type0->code ()) |
14f9c5c9 AS |
8749 | { |
8750 | default: | |
8751 | return type0; | |
8752 | case TYPE_CODE_STRUCT: | |
8753 | type = dynamic_template_type (type0); | |
d2e4a39e | 8754 | if (type != NULL) |
dda83cd7 | 8755 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8756 | else |
dda83cd7 | 8757 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8758 | case TYPE_CODE_UNION: |
8759 | type = ada_find_parallel_type (type0, "___XVU"); | |
8760 | if (type != NULL) | |
dda83cd7 | 8761 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8762 | else |
dda83cd7 | 8763 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8764 | } |
8765 | } | |
8766 | ||
4c4b4cd2 PH |
8767 | /* A static approximation of TYPE with all type wrappers removed. */ |
8768 | ||
d2e4a39e AS |
8769 | static struct type * |
8770 | static_unwrap_type (struct type *type) | |
14f9c5c9 AS |
8771 | { |
8772 | if (ada_is_aligner_type (type)) | |
8773 | { | |
940da03e | 8774 | struct type *type1 = ada_check_typedef (type)->field (0).type (); |
14f9c5c9 | 8775 | if (ada_type_name (type1) == NULL) |
d0e39ea2 | 8776 | type1->set_name (ada_type_name (type)); |
14f9c5c9 AS |
8777 | |
8778 | return static_unwrap_type (type1); | |
8779 | } | |
d2e4a39e | 8780 | else |
14f9c5c9 | 8781 | { |
d2e4a39e | 8782 | struct type *raw_real_type = ada_get_base_type (type); |
5b4ee69b | 8783 | |
d2e4a39e | 8784 | if (raw_real_type == type) |
dda83cd7 | 8785 | return type; |
14f9c5c9 | 8786 | else |
dda83cd7 | 8787 | return to_static_fixed_type (raw_real_type); |
14f9c5c9 AS |
8788 | } |
8789 | } | |
8790 | ||
8791 | /* In some cases, incomplete and private types require | |
4c4b4cd2 | 8792 | cross-references that are not resolved as records (for example, |
14f9c5c9 AS |
8793 | type Foo; |
8794 | type FooP is access Foo; | |
8795 | V: FooP; | |
8796 | type Foo is array ...; | |
4c4b4cd2 | 8797 | ). In these cases, since there is no mechanism for producing |
14f9c5c9 AS |
8798 | cross-references to such types, we instead substitute for FooP a |
8799 | stub enumeration type that is nowhere resolved, and whose tag is | |
4c4b4cd2 | 8800 | the name of the actual type. Call these types "non-record stubs". */ |
14f9c5c9 AS |
8801 | |
8802 | /* A type equivalent to TYPE that is not a non-record stub, if one | |
4c4b4cd2 PH |
8803 | exists, otherwise TYPE. */ |
8804 | ||
d2e4a39e | 8805 | struct type * |
61ee279c | 8806 | ada_check_typedef (struct type *type) |
14f9c5c9 | 8807 | { |
727e3d2e JB |
8808 | if (type == NULL) |
8809 | return NULL; | |
8810 | ||
736ade86 XR |
8811 | /* If our type is an access to an unconstrained array, which is encoded |
8812 | as a TYPE_CODE_TYPEDEF of a fat pointer, then we're done. | |
720d1a40 JB |
8813 | We don't want to strip the TYPE_CODE_TYPDEF layer, because this is |
8814 | what allows us to distinguish between fat pointers that represent | |
8815 | array types, and fat pointers that represent array access types | |
8816 | (in both cases, the compiler implements them as fat pointers). */ | |
736ade86 | 8817 | if (ada_is_access_to_unconstrained_array (type)) |
720d1a40 JB |
8818 | return type; |
8819 | ||
f168693b | 8820 | type = check_typedef (type); |
78134374 | 8821 | if (type == NULL || type->code () != TYPE_CODE_ENUM |
e46d3488 | 8822 | || !type->is_stub () |
7d93a1e0 | 8823 | || type->name () == NULL) |
14f9c5c9 | 8824 | return type; |
d2e4a39e | 8825 | else |
14f9c5c9 | 8826 | { |
7d93a1e0 | 8827 | const char *name = type->name (); |
d2e4a39e | 8828 | struct type *type1 = ada_find_any_type (name); |
5b4ee69b | 8829 | |
05e522ef | 8830 | if (type1 == NULL) |
dda83cd7 | 8831 | return type; |
05e522ef JB |
8832 | |
8833 | /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with | |
8834 | stubs pointing to arrays, as we don't create symbols for array | |
3a867c22 JB |
8835 | types, only for the typedef-to-array types). If that's the case, |
8836 | strip the typedef layer. */ | |
78134374 | 8837 | if (type1->code () == TYPE_CODE_TYPEDEF) |
3a867c22 JB |
8838 | type1 = ada_check_typedef (type1); |
8839 | ||
8840 | return type1; | |
14f9c5c9 AS |
8841 | } |
8842 | } | |
8843 | ||
8844 | /* A value representing the data at VALADDR/ADDRESS as described by | |
8845 | type TYPE0, but with a standard (static-sized) type that correctly | |
8846 | describes it. If VAL0 is not NULL and TYPE0 already is a standard | |
8847 | type, then return VAL0 [this feature is simply to avoid redundant | |
4c4b4cd2 | 8848 | creation of struct values]. */ |
14f9c5c9 | 8849 | |
4c4b4cd2 PH |
8850 | static struct value * |
8851 | ada_to_fixed_value_create (struct type *type0, CORE_ADDR address, | |
dda83cd7 | 8852 | struct value *val0) |
14f9c5c9 | 8853 | { |
1ed6ede0 | 8854 | struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1); |
5b4ee69b | 8855 | |
14f9c5c9 AS |
8856 | if (type == type0 && val0 != NULL) |
8857 | return val0; | |
cc0e770c JB |
8858 | |
8859 | if (VALUE_LVAL (val0) != lval_memory) | |
8860 | { | |
8861 | /* Our value does not live in memory; it could be a convenience | |
8862 | variable, for instance. Create a not_lval value using val0's | |
8863 | contents. */ | |
8864 | return value_from_contents (type, value_contents (val0)); | |
8865 | } | |
8866 | ||
8867 | return value_from_contents_and_address (type, 0, address); | |
4c4b4cd2 PH |
8868 | } |
8869 | ||
8870 | /* A value representing VAL, but with a standard (static-sized) type | |
8871 | that correctly describes it. Does not necessarily create a new | |
8872 | value. */ | |
8873 | ||
0c3acc09 | 8874 | struct value * |
4c4b4cd2 PH |
8875 | ada_to_fixed_value (struct value *val) |
8876 | { | |
c48db5ca | 8877 | val = unwrap_value (val); |
d8ce9127 | 8878 | val = ada_to_fixed_value_create (value_type (val), value_address (val), val); |
c48db5ca | 8879 | return val; |
14f9c5c9 | 8880 | } |
d2e4a39e | 8881 | \f |
14f9c5c9 | 8882 | |
14f9c5c9 AS |
8883 | /* Attributes */ |
8884 | ||
4c4b4cd2 PH |
8885 | /* Table mapping attribute numbers to names. |
8886 | NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */ | |
14f9c5c9 | 8887 | |
27087b7f | 8888 | static const char * const attribute_names[] = { |
14f9c5c9 AS |
8889 | "<?>", |
8890 | ||
d2e4a39e | 8891 | "first", |
14f9c5c9 AS |
8892 | "last", |
8893 | "length", | |
8894 | "image", | |
14f9c5c9 AS |
8895 | "max", |
8896 | "min", | |
4c4b4cd2 PH |
8897 | "modulus", |
8898 | "pos", | |
8899 | "size", | |
8900 | "tag", | |
14f9c5c9 | 8901 | "val", |
14f9c5c9 AS |
8902 | 0 |
8903 | }; | |
8904 | ||
de93309a | 8905 | static const char * |
4c4b4cd2 | 8906 | ada_attribute_name (enum exp_opcode n) |
14f9c5c9 | 8907 | { |
4c4b4cd2 PH |
8908 | if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL) |
8909 | return attribute_names[n - OP_ATR_FIRST + 1]; | |
14f9c5c9 AS |
8910 | else |
8911 | return attribute_names[0]; | |
8912 | } | |
8913 | ||
4c4b4cd2 | 8914 | /* Evaluate the 'POS attribute applied to ARG. */ |
14f9c5c9 | 8915 | |
4c4b4cd2 PH |
8916 | static LONGEST |
8917 | pos_atr (struct value *arg) | |
14f9c5c9 | 8918 | { |
24209737 PH |
8919 | struct value *val = coerce_ref (arg); |
8920 | struct type *type = value_type (val); | |
14f9c5c9 | 8921 | |
d2e4a39e | 8922 | if (!discrete_type_p (type)) |
323e0a4a | 8923 | error (_("'POS only defined on discrete types")); |
14f9c5c9 | 8924 | |
6244c119 SM |
8925 | gdb::optional<LONGEST> result = discrete_position (type, value_as_long (val)); |
8926 | if (!result.has_value ()) | |
aa715135 | 8927 | error (_("enumeration value is invalid: can't find 'POS")); |
14f9c5c9 | 8928 | |
6244c119 | 8929 | return *result; |
4c4b4cd2 PH |
8930 | } |
8931 | ||
8932 | static struct value * | |
3cb382c9 | 8933 | value_pos_atr (struct type *type, struct value *arg) |
4c4b4cd2 | 8934 | { |
3cb382c9 | 8935 | return value_from_longest (type, pos_atr (arg)); |
14f9c5c9 AS |
8936 | } |
8937 | ||
4c4b4cd2 | 8938 | /* Evaluate the TYPE'VAL attribute applied to ARG. */ |
14f9c5c9 | 8939 | |
d2e4a39e | 8940 | static struct value * |
53a47a3e | 8941 | val_atr (struct type *type, LONGEST val) |
14f9c5c9 | 8942 | { |
53a47a3e | 8943 | gdb_assert (discrete_type_p (type)); |
0bc2354b TT |
8944 | if (type->code () == TYPE_CODE_RANGE) |
8945 | type = TYPE_TARGET_TYPE (type); | |
78134374 | 8946 | if (type->code () == TYPE_CODE_ENUM) |
14f9c5c9 | 8947 | { |
53a47a3e | 8948 | if (val < 0 || val >= type->num_fields ()) |
dda83cd7 | 8949 | error (_("argument to 'VAL out of range")); |
53a47a3e | 8950 | val = TYPE_FIELD_ENUMVAL (type, val); |
14f9c5c9 | 8951 | } |
53a47a3e TT |
8952 | return value_from_longest (type, val); |
8953 | } | |
8954 | ||
8955 | static struct value * | |
8956 | value_val_atr (struct type *type, struct value *arg) | |
8957 | { | |
8958 | if (!discrete_type_p (type)) | |
8959 | error (_("'VAL only defined on discrete types")); | |
8960 | if (!integer_type_p (value_type (arg))) | |
8961 | error (_("'VAL requires integral argument")); | |
8962 | ||
8963 | return val_atr (type, value_as_long (arg)); | |
14f9c5c9 | 8964 | } |
14f9c5c9 | 8965 | \f |
d2e4a39e | 8966 | |
dda83cd7 | 8967 | /* Evaluation */ |
14f9c5c9 | 8968 | |
4c4b4cd2 PH |
8969 | /* True if TYPE appears to be an Ada character type. |
8970 | [At the moment, this is true only for Character and Wide_Character; | |
8971 | It is a heuristic test that could stand improvement]. */ | |
14f9c5c9 | 8972 | |
fc913e53 | 8973 | bool |
d2e4a39e | 8974 | ada_is_character_type (struct type *type) |
14f9c5c9 | 8975 | { |
7b9f71f2 JB |
8976 | const char *name; |
8977 | ||
8978 | /* If the type code says it's a character, then assume it really is, | |
8979 | and don't check any further. */ | |
78134374 | 8980 | if (type->code () == TYPE_CODE_CHAR) |
fc913e53 | 8981 | return true; |
7b9f71f2 JB |
8982 | |
8983 | /* Otherwise, assume it's a character type iff it is a discrete type | |
8984 | with a known character type name. */ | |
8985 | name = ada_type_name (type); | |
8986 | return (name != NULL | |
dda83cd7 SM |
8987 | && (type->code () == TYPE_CODE_INT |
8988 | || type->code () == TYPE_CODE_RANGE) | |
8989 | && (strcmp (name, "character") == 0 | |
8990 | || strcmp (name, "wide_character") == 0 | |
8991 | || strcmp (name, "wide_wide_character") == 0 | |
8992 | || strcmp (name, "unsigned char") == 0)); | |
14f9c5c9 AS |
8993 | } |
8994 | ||
4c4b4cd2 | 8995 | /* True if TYPE appears to be an Ada string type. */ |
14f9c5c9 | 8996 | |
fc913e53 | 8997 | bool |
ebf56fd3 | 8998 | ada_is_string_type (struct type *type) |
14f9c5c9 | 8999 | { |
61ee279c | 9000 | type = ada_check_typedef (type); |
d2e4a39e | 9001 | if (type != NULL |
78134374 | 9002 | && type->code () != TYPE_CODE_PTR |
76a01679 | 9003 | && (ada_is_simple_array_type (type) |
dda83cd7 | 9004 | || ada_is_array_descriptor_type (type)) |
14f9c5c9 AS |
9005 | && ada_array_arity (type) == 1) |
9006 | { | |
9007 | struct type *elttype = ada_array_element_type (type, 1); | |
9008 | ||
9009 | return ada_is_character_type (elttype); | |
9010 | } | |
d2e4a39e | 9011 | else |
fc913e53 | 9012 | return false; |
14f9c5c9 AS |
9013 | } |
9014 | ||
5bf03f13 JB |
9015 | /* The compiler sometimes provides a parallel XVS type for a given |
9016 | PAD type. Normally, it is safe to follow the PAD type directly, | |
9017 | but older versions of the compiler have a bug that causes the offset | |
9018 | of its "F" field to be wrong. Following that field in that case | |
9019 | would lead to incorrect results, but this can be worked around | |
9020 | by ignoring the PAD type and using the associated XVS type instead. | |
9021 | ||
9022 | Set to True if the debugger should trust the contents of PAD types. | |
9023 | Otherwise, ignore the PAD type if there is a parallel XVS type. */ | |
491144b5 | 9024 | static bool trust_pad_over_xvs = true; |
14f9c5c9 AS |
9025 | |
9026 | /* True if TYPE is a struct type introduced by the compiler to force the | |
9027 | alignment of a value. Such types have a single field with a | |
4c4b4cd2 | 9028 | distinctive name. */ |
14f9c5c9 AS |
9029 | |
9030 | int | |
ebf56fd3 | 9031 | ada_is_aligner_type (struct type *type) |
14f9c5c9 | 9032 | { |
61ee279c | 9033 | type = ada_check_typedef (type); |
714e53ab | 9034 | |
5bf03f13 | 9035 | if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL) |
714e53ab PH |
9036 | return 0; |
9037 | ||
78134374 | 9038 | return (type->code () == TYPE_CODE_STRUCT |
dda83cd7 SM |
9039 | && type->num_fields () == 1 |
9040 | && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0); | |
14f9c5c9 AS |
9041 | } |
9042 | ||
9043 | /* If there is an ___XVS-convention type parallel to SUBTYPE, return | |
4c4b4cd2 | 9044 | the parallel type. */ |
14f9c5c9 | 9045 | |
d2e4a39e AS |
9046 | struct type * |
9047 | ada_get_base_type (struct type *raw_type) | |
14f9c5c9 | 9048 | { |
d2e4a39e AS |
9049 | struct type *real_type_namer; |
9050 | struct type *raw_real_type; | |
14f9c5c9 | 9051 | |
78134374 | 9052 | if (raw_type == NULL || raw_type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
9053 | return raw_type; |
9054 | ||
284614f0 JB |
9055 | if (ada_is_aligner_type (raw_type)) |
9056 | /* The encoding specifies that we should always use the aligner type. | |
9057 | So, even if this aligner type has an associated XVS type, we should | |
9058 | simply ignore it. | |
9059 | ||
9060 | According to the compiler gurus, an XVS type parallel to an aligner | |
9061 | type may exist because of a stabs limitation. In stabs, aligner | |
9062 | types are empty because the field has a variable-sized type, and | |
9063 | thus cannot actually be used as an aligner type. As a result, | |
9064 | we need the associated parallel XVS type to decode the type. | |
9065 | Since the policy in the compiler is to not change the internal | |
9066 | representation based on the debugging info format, we sometimes | |
9067 | end up having a redundant XVS type parallel to the aligner type. */ | |
9068 | return raw_type; | |
9069 | ||
14f9c5c9 | 9070 | real_type_namer = ada_find_parallel_type (raw_type, "___XVS"); |
d2e4a39e | 9071 | if (real_type_namer == NULL |
78134374 | 9072 | || real_type_namer->code () != TYPE_CODE_STRUCT |
1f704f76 | 9073 | || real_type_namer->num_fields () != 1) |
14f9c5c9 AS |
9074 | return raw_type; |
9075 | ||
940da03e | 9076 | if (real_type_namer->field (0).type ()->code () != TYPE_CODE_REF) |
f80d3ff2 JB |
9077 | { |
9078 | /* This is an older encoding form where the base type needs to be | |
85102364 | 9079 | looked up by name. We prefer the newer encoding because it is |
f80d3ff2 JB |
9080 | more efficient. */ |
9081 | raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0)); | |
9082 | if (raw_real_type == NULL) | |
9083 | return raw_type; | |
9084 | else | |
9085 | return raw_real_type; | |
9086 | } | |
9087 | ||
9088 | /* The field in our XVS type is a reference to the base type. */ | |
940da03e | 9089 | return TYPE_TARGET_TYPE (real_type_namer->field (0).type ()); |
d2e4a39e | 9090 | } |
14f9c5c9 | 9091 | |
4c4b4cd2 | 9092 | /* The type of value designated by TYPE, with all aligners removed. */ |
14f9c5c9 | 9093 | |
d2e4a39e AS |
9094 | struct type * |
9095 | ada_aligned_type (struct type *type) | |
14f9c5c9 AS |
9096 | { |
9097 | if (ada_is_aligner_type (type)) | |
940da03e | 9098 | return ada_aligned_type (type->field (0).type ()); |
14f9c5c9 AS |
9099 | else |
9100 | return ada_get_base_type (type); | |
9101 | } | |
9102 | ||
9103 | ||
9104 | /* The address of the aligned value in an object at address VALADDR | |
4c4b4cd2 | 9105 | having type TYPE. Assumes ada_is_aligner_type (TYPE). */ |
14f9c5c9 | 9106 | |
fc1a4b47 AC |
9107 | const gdb_byte * |
9108 | ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr) | |
14f9c5c9 | 9109 | { |
d2e4a39e | 9110 | if (ada_is_aligner_type (type)) |
940da03e | 9111 | return ada_aligned_value_addr (type->field (0).type (), |
dda83cd7 SM |
9112 | valaddr + |
9113 | TYPE_FIELD_BITPOS (type, | |
9114 | 0) / TARGET_CHAR_BIT); | |
14f9c5c9 AS |
9115 | else |
9116 | return valaddr; | |
9117 | } | |
9118 | ||
4c4b4cd2 PH |
9119 | |
9120 | ||
14f9c5c9 | 9121 | /* The printed representation of an enumeration literal with encoded |
4c4b4cd2 | 9122 | name NAME. The value is good to the next call of ada_enum_name. */ |
d2e4a39e AS |
9123 | const char * |
9124 | ada_enum_name (const char *name) | |
14f9c5c9 | 9125 | { |
4c4b4cd2 PH |
9126 | static char *result; |
9127 | static size_t result_len = 0; | |
e6a959d6 | 9128 | const char *tmp; |
14f9c5c9 | 9129 | |
4c4b4cd2 PH |
9130 | /* First, unqualify the enumeration name: |
9131 | 1. Search for the last '.' character. If we find one, then skip | |
177b42fe | 9132 | all the preceding characters, the unqualified name starts |
76a01679 | 9133 | right after that dot. |
4c4b4cd2 | 9134 | 2. Otherwise, we may be debugging on a target where the compiler |
76a01679 JB |
9135 | translates dots into "__". Search forward for double underscores, |
9136 | but stop searching when we hit an overloading suffix, which is | |
9137 | of the form "__" followed by digits. */ | |
4c4b4cd2 | 9138 | |
c3e5cd34 PH |
9139 | tmp = strrchr (name, '.'); |
9140 | if (tmp != NULL) | |
4c4b4cd2 PH |
9141 | name = tmp + 1; |
9142 | else | |
14f9c5c9 | 9143 | { |
4c4b4cd2 | 9144 | while ((tmp = strstr (name, "__")) != NULL) |
dda83cd7 SM |
9145 | { |
9146 | if (isdigit (tmp[2])) | |
9147 | break; | |
9148 | else | |
9149 | name = tmp + 2; | |
9150 | } | |
14f9c5c9 AS |
9151 | } |
9152 | ||
9153 | if (name[0] == 'Q') | |
9154 | { | |
14f9c5c9 | 9155 | int v; |
5b4ee69b | 9156 | |
14f9c5c9 | 9157 | if (name[1] == 'U' || name[1] == 'W') |
dda83cd7 SM |
9158 | { |
9159 | if (sscanf (name + 2, "%x", &v) != 1) | |
9160 | return name; | |
9161 | } | |
272560b5 TT |
9162 | else if (((name[1] >= '0' && name[1] <= '9') |
9163 | || (name[1] >= 'a' && name[1] <= 'z')) | |
9164 | && name[2] == '\0') | |
9165 | { | |
9166 | GROW_VECT (result, result_len, 4); | |
9167 | xsnprintf (result, result_len, "'%c'", name[1]); | |
9168 | return result; | |
9169 | } | |
14f9c5c9 | 9170 | else |
dda83cd7 | 9171 | return name; |
14f9c5c9 | 9172 | |
4c4b4cd2 | 9173 | GROW_VECT (result, result_len, 16); |
14f9c5c9 | 9174 | if (isascii (v) && isprint (v)) |
dda83cd7 | 9175 | xsnprintf (result, result_len, "'%c'", v); |
14f9c5c9 | 9176 | else if (name[1] == 'U') |
dda83cd7 | 9177 | xsnprintf (result, result_len, "[\"%02x\"]", v); |
14f9c5c9 | 9178 | else |
dda83cd7 | 9179 | xsnprintf (result, result_len, "[\"%04x\"]", v); |
14f9c5c9 AS |
9180 | |
9181 | return result; | |
9182 | } | |
d2e4a39e | 9183 | else |
4c4b4cd2 | 9184 | { |
c3e5cd34 PH |
9185 | tmp = strstr (name, "__"); |
9186 | if (tmp == NULL) | |
9187 | tmp = strstr (name, "$"); | |
9188 | if (tmp != NULL) | |
dda83cd7 SM |
9189 | { |
9190 | GROW_VECT (result, result_len, tmp - name + 1); | |
9191 | strncpy (result, name, tmp - name); | |
9192 | result[tmp - name] = '\0'; | |
9193 | return result; | |
9194 | } | |
4c4b4cd2 PH |
9195 | |
9196 | return name; | |
9197 | } | |
14f9c5c9 AS |
9198 | } |
9199 | ||
14f9c5c9 AS |
9200 | /* Evaluate the subexpression of EXP starting at *POS as for |
9201 | evaluate_type, updating *POS to point just past the evaluated | |
4c4b4cd2 | 9202 | expression. */ |
14f9c5c9 | 9203 | |
d2e4a39e AS |
9204 | static struct value * |
9205 | evaluate_subexp_type (struct expression *exp, int *pos) | |
14f9c5c9 | 9206 | { |
fe1fe7ea | 9207 | return evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
14f9c5c9 AS |
9208 | } |
9209 | ||
9210 | /* If VAL is wrapped in an aligner or subtype wrapper, return the | |
4c4b4cd2 | 9211 | value it wraps. */ |
14f9c5c9 | 9212 | |
d2e4a39e AS |
9213 | static struct value * |
9214 | unwrap_value (struct value *val) | |
14f9c5c9 | 9215 | { |
df407dfe | 9216 | struct type *type = ada_check_typedef (value_type (val)); |
5b4ee69b | 9217 | |
14f9c5c9 AS |
9218 | if (ada_is_aligner_type (type)) |
9219 | { | |
de4d072f | 9220 | struct value *v = ada_value_struct_elt (val, "F", 0); |
df407dfe | 9221 | struct type *val_type = ada_check_typedef (value_type (v)); |
5b4ee69b | 9222 | |
14f9c5c9 | 9223 | if (ada_type_name (val_type) == NULL) |
d0e39ea2 | 9224 | val_type->set_name (ada_type_name (type)); |
14f9c5c9 AS |
9225 | |
9226 | return unwrap_value (v); | |
9227 | } | |
d2e4a39e | 9228 | else |
14f9c5c9 | 9229 | { |
d2e4a39e | 9230 | struct type *raw_real_type = |
dda83cd7 | 9231 | ada_check_typedef (ada_get_base_type (type)); |
d2e4a39e | 9232 | |
5bf03f13 JB |
9233 | /* If there is no parallel XVS or XVE type, then the value is |
9234 | already unwrapped. Return it without further modification. */ | |
9235 | if ((type == raw_real_type) | |
9236 | && ada_find_parallel_type (type, "___XVE") == NULL) | |
9237 | return val; | |
14f9c5c9 | 9238 | |
d2e4a39e | 9239 | return |
dda83cd7 SM |
9240 | coerce_unspec_val_to_type |
9241 | (val, ada_to_fixed_type (raw_real_type, 0, | |
9242 | value_address (val), | |
9243 | NULL, 1)); | |
14f9c5c9 AS |
9244 | } |
9245 | } | |
d2e4a39e AS |
9246 | |
9247 | static struct value * | |
75f24e86 | 9248 | cast_from_gnat_encoded_fixed_point_type (struct type *type, struct value *arg) |
14f9c5c9 | 9249 | { |
db99d0d0 JB |
9250 | struct value *scale |
9251 | = gnat_encoded_fixed_point_scaling_factor (value_type (arg)); | |
50eff16b | 9252 | arg = value_cast (value_type (scale), arg); |
14f9c5c9 | 9253 | |
50eff16b UW |
9254 | arg = value_binop (arg, scale, BINOP_MUL); |
9255 | return value_cast (type, arg); | |
14f9c5c9 AS |
9256 | } |
9257 | ||
d2e4a39e | 9258 | static struct value * |
75f24e86 | 9259 | cast_to_gnat_encoded_fixed_point_type (struct type *type, struct value *arg) |
14f9c5c9 | 9260 | { |
50eff16b UW |
9261 | if (type == value_type (arg)) |
9262 | return arg; | |
5b4ee69b | 9263 | |
75f24e86 | 9264 | struct value *scale = gnat_encoded_fixed_point_scaling_factor (type); |
b2188a06 | 9265 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg))) |
75f24e86 | 9266 | arg = cast_from_gnat_encoded_fixed_point_type (value_type (scale), arg); |
50eff16b UW |
9267 | else |
9268 | arg = value_cast (value_type (scale), arg); | |
9269 | ||
9270 | arg = value_binop (arg, scale, BINOP_DIV); | |
9271 | return value_cast (type, arg); | |
14f9c5c9 AS |
9272 | } |
9273 | ||
d99dcf51 JB |
9274 | /* Given two array types T1 and T2, return nonzero iff both arrays |
9275 | contain the same number of elements. */ | |
9276 | ||
9277 | static int | |
9278 | ada_same_array_size_p (struct type *t1, struct type *t2) | |
9279 | { | |
9280 | LONGEST lo1, hi1, lo2, hi2; | |
9281 | ||
9282 | /* Get the array bounds in order to verify that the size of | |
9283 | the two arrays match. */ | |
9284 | if (!get_array_bounds (t1, &lo1, &hi1) | |
9285 | || !get_array_bounds (t2, &lo2, &hi2)) | |
9286 | error (_("unable to determine array bounds")); | |
9287 | ||
9288 | /* To make things easier for size comparison, normalize a bit | |
9289 | the case of empty arrays by making sure that the difference | |
9290 | between upper bound and lower bound is always -1. */ | |
9291 | if (lo1 > hi1) | |
9292 | hi1 = lo1 - 1; | |
9293 | if (lo2 > hi2) | |
9294 | hi2 = lo2 - 1; | |
9295 | ||
9296 | return (hi1 - lo1 == hi2 - lo2); | |
9297 | } | |
9298 | ||
9299 | /* Assuming that VAL is an array of integrals, and TYPE represents | |
9300 | an array with the same number of elements, but with wider integral | |
9301 | elements, return an array "casted" to TYPE. In practice, this | |
9302 | means that the returned array is built by casting each element | |
9303 | of the original array into TYPE's (wider) element type. */ | |
9304 | ||
9305 | static struct value * | |
9306 | ada_promote_array_of_integrals (struct type *type, struct value *val) | |
9307 | { | |
9308 | struct type *elt_type = TYPE_TARGET_TYPE (type); | |
9309 | LONGEST lo, hi; | |
9310 | struct value *res; | |
9311 | LONGEST i; | |
9312 | ||
9313 | /* Verify that both val and type are arrays of scalars, and | |
9314 | that the size of val's elements is smaller than the size | |
9315 | of type's element. */ | |
78134374 | 9316 | gdb_assert (type->code () == TYPE_CODE_ARRAY); |
d99dcf51 | 9317 | gdb_assert (is_integral_type (TYPE_TARGET_TYPE (type))); |
78134374 | 9318 | gdb_assert (value_type (val)->code () == TYPE_CODE_ARRAY); |
d99dcf51 JB |
9319 | gdb_assert (is_integral_type (TYPE_TARGET_TYPE (value_type (val)))); |
9320 | gdb_assert (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) | |
9321 | > TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val)))); | |
9322 | ||
9323 | if (!get_array_bounds (type, &lo, &hi)) | |
9324 | error (_("unable to determine array bounds")); | |
9325 | ||
9326 | res = allocate_value (type); | |
9327 | ||
9328 | /* Promote each array element. */ | |
9329 | for (i = 0; i < hi - lo + 1; i++) | |
9330 | { | |
9331 | struct value *elt = value_cast (elt_type, value_subscript (val, lo + i)); | |
9332 | ||
9333 | memcpy (value_contents_writeable (res) + (i * TYPE_LENGTH (elt_type)), | |
9334 | value_contents_all (elt), TYPE_LENGTH (elt_type)); | |
9335 | } | |
9336 | ||
9337 | return res; | |
9338 | } | |
9339 | ||
4c4b4cd2 PH |
9340 | /* Coerce VAL as necessary for assignment to an lval of type TYPE, and |
9341 | return the converted value. */ | |
9342 | ||
d2e4a39e AS |
9343 | static struct value * |
9344 | coerce_for_assign (struct type *type, struct value *val) | |
14f9c5c9 | 9345 | { |
df407dfe | 9346 | struct type *type2 = value_type (val); |
5b4ee69b | 9347 | |
14f9c5c9 AS |
9348 | if (type == type2) |
9349 | return val; | |
9350 | ||
61ee279c PH |
9351 | type2 = ada_check_typedef (type2); |
9352 | type = ada_check_typedef (type); | |
14f9c5c9 | 9353 | |
78134374 SM |
9354 | if (type2->code () == TYPE_CODE_PTR |
9355 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 AS |
9356 | { |
9357 | val = ada_value_ind (val); | |
df407dfe | 9358 | type2 = value_type (val); |
14f9c5c9 AS |
9359 | } |
9360 | ||
78134374 SM |
9361 | if (type2->code () == TYPE_CODE_ARRAY |
9362 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 | 9363 | { |
d99dcf51 JB |
9364 | if (!ada_same_array_size_p (type, type2)) |
9365 | error (_("cannot assign arrays of different length")); | |
9366 | ||
9367 | if (is_integral_type (TYPE_TARGET_TYPE (type)) | |
9368 | && is_integral_type (TYPE_TARGET_TYPE (type2)) | |
9369 | && TYPE_LENGTH (TYPE_TARGET_TYPE (type2)) | |
9370 | < TYPE_LENGTH (TYPE_TARGET_TYPE (type))) | |
9371 | { | |
9372 | /* Allow implicit promotion of the array elements to | |
9373 | a wider type. */ | |
9374 | return ada_promote_array_of_integrals (type, val); | |
9375 | } | |
9376 | ||
9377 | if (TYPE_LENGTH (TYPE_TARGET_TYPE (type2)) | |
dda83cd7 SM |
9378 | != TYPE_LENGTH (TYPE_TARGET_TYPE (type))) |
9379 | error (_("Incompatible types in assignment")); | |
04624583 | 9380 | deprecated_set_value_type (val, type); |
14f9c5c9 | 9381 | } |
d2e4a39e | 9382 | return val; |
14f9c5c9 AS |
9383 | } |
9384 | ||
4c4b4cd2 PH |
9385 | static struct value * |
9386 | ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op) | |
9387 | { | |
9388 | struct value *val; | |
9389 | struct type *type1, *type2; | |
9390 | LONGEST v, v1, v2; | |
9391 | ||
994b9211 AC |
9392 | arg1 = coerce_ref (arg1); |
9393 | arg2 = coerce_ref (arg2); | |
18af8284 JB |
9394 | type1 = get_base_type (ada_check_typedef (value_type (arg1))); |
9395 | type2 = get_base_type (ada_check_typedef (value_type (arg2))); | |
4c4b4cd2 | 9396 | |
78134374 SM |
9397 | if (type1->code () != TYPE_CODE_INT |
9398 | || type2->code () != TYPE_CODE_INT) | |
4c4b4cd2 PH |
9399 | return value_binop (arg1, arg2, op); |
9400 | ||
76a01679 | 9401 | switch (op) |
4c4b4cd2 PH |
9402 | { |
9403 | case BINOP_MOD: | |
9404 | case BINOP_DIV: | |
9405 | case BINOP_REM: | |
9406 | break; | |
9407 | default: | |
9408 | return value_binop (arg1, arg2, op); | |
9409 | } | |
9410 | ||
9411 | v2 = value_as_long (arg2); | |
9412 | if (v2 == 0) | |
323e0a4a | 9413 | error (_("second operand of %s must not be zero."), op_string (op)); |
4c4b4cd2 | 9414 | |
c6d940a9 | 9415 | if (type1->is_unsigned () || op == BINOP_MOD) |
4c4b4cd2 PH |
9416 | return value_binop (arg1, arg2, op); |
9417 | ||
9418 | v1 = value_as_long (arg1); | |
9419 | switch (op) | |
9420 | { | |
9421 | case BINOP_DIV: | |
9422 | v = v1 / v2; | |
76a01679 | 9423 | if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0) |
dda83cd7 | 9424 | v += v > 0 ? -1 : 1; |
4c4b4cd2 PH |
9425 | break; |
9426 | case BINOP_REM: | |
9427 | v = v1 % v2; | |
76a01679 | 9428 | if (v * v1 < 0) |
dda83cd7 | 9429 | v -= v2; |
4c4b4cd2 PH |
9430 | break; |
9431 | default: | |
9432 | /* Should not reach this point. */ | |
9433 | v = 0; | |
9434 | } | |
9435 | ||
9436 | val = allocate_value (type1); | |
990a07ab | 9437 | store_unsigned_integer (value_contents_raw (val), |
dda83cd7 | 9438 | TYPE_LENGTH (value_type (val)), |
34877895 | 9439 | type_byte_order (type1), v); |
4c4b4cd2 PH |
9440 | return val; |
9441 | } | |
9442 | ||
9443 | static int | |
9444 | ada_value_equal (struct value *arg1, struct value *arg2) | |
9445 | { | |
df407dfe AC |
9446 | if (ada_is_direct_array_type (value_type (arg1)) |
9447 | || ada_is_direct_array_type (value_type (arg2))) | |
4c4b4cd2 | 9448 | { |
79e8fcaa JB |
9449 | struct type *arg1_type, *arg2_type; |
9450 | ||
f58b38bf | 9451 | /* Automatically dereference any array reference before |
dda83cd7 | 9452 | we attempt to perform the comparison. */ |
f58b38bf JB |
9453 | arg1 = ada_coerce_ref (arg1); |
9454 | arg2 = ada_coerce_ref (arg2); | |
79e8fcaa | 9455 | |
4c4b4cd2 PH |
9456 | arg1 = ada_coerce_to_simple_array (arg1); |
9457 | arg2 = ada_coerce_to_simple_array (arg2); | |
79e8fcaa JB |
9458 | |
9459 | arg1_type = ada_check_typedef (value_type (arg1)); | |
9460 | arg2_type = ada_check_typedef (value_type (arg2)); | |
9461 | ||
78134374 | 9462 | if (arg1_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
9463 | || arg2_type->code () != TYPE_CODE_ARRAY) |
9464 | error (_("Attempt to compare array with non-array")); | |
4c4b4cd2 | 9465 | /* FIXME: The following works only for types whose |
dda83cd7 SM |
9466 | representations use all bits (no padding or undefined bits) |
9467 | and do not have user-defined equality. */ | |
79e8fcaa JB |
9468 | return (TYPE_LENGTH (arg1_type) == TYPE_LENGTH (arg2_type) |
9469 | && memcmp (value_contents (arg1), value_contents (arg2), | |
9470 | TYPE_LENGTH (arg1_type)) == 0); | |
4c4b4cd2 PH |
9471 | } |
9472 | return value_equal (arg1, arg2); | |
9473 | } | |
9474 | ||
52ce6436 PH |
9475 | /* Assign the result of evaluating EXP starting at *POS to the INDEXth |
9476 | component of LHS (a simple array or a record), updating *POS past | |
9477 | the expression, assuming that LHS is contained in CONTAINER. Does | |
9478 | not modify the inferior's memory, nor does it modify LHS (unless | |
9479 | LHS == CONTAINER). */ | |
9480 | ||
9481 | static void | |
9482 | assign_component (struct value *container, struct value *lhs, LONGEST index, | |
9483 | struct expression *exp, int *pos) | |
9484 | { | |
9485 | struct value *mark = value_mark (); | |
9486 | struct value *elt; | |
0e2da9f0 | 9487 | struct type *lhs_type = check_typedef (value_type (lhs)); |
5b4ee69b | 9488 | |
78134374 | 9489 | if (lhs_type->code () == TYPE_CODE_ARRAY) |
52ce6436 | 9490 | { |
22601c15 UW |
9491 | struct type *index_type = builtin_type (exp->gdbarch)->builtin_int; |
9492 | struct value *index_val = value_from_longest (index_type, index); | |
5b4ee69b | 9493 | |
52ce6436 PH |
9494 | elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val)); |
9495 | } | |
9496 | else | |
9497 | { | |
9498 | elt = ada_index_struct_field (index, lhs, 0, value_type (lhs)); | |
c48db5ca | 9499 | elt = ada_to_fixed_value (elt); |
52ce6436 PH |
9500 | } |
9501 | ||
9502 | if (exp->elts[*pos].opcode == OP_AGGREGATE) | |
9503 | assign_aggregate (container, elt, exp, pos, EVAL_NORMAL); | |
9504 | else | |
9505 | value_assign_to_component (container, elt, | |
9506 | ada_evaluate_subexp (NULL, exp, pos, | |
9507 | EVAL_NORMAL)); | |
9508 | ||
9509 | value_free_to_mark (mark); | |
9510 | } | |
9511 | ||
9512 | /* Assuming that LHS represents an lvalue having a record or array | |
9513 | type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment | |
9514 | of that aggregate's value to LHS, advancing *POS past the | |
9515 | aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an | |
9516 | lvalue containing LHS (possibly LHS itself). Does not modify | |
9517 | the inferior's memory, nor does it modify the contents of | |
0963b4bd | 9518 | LHS (unless == CONTAINER). Returns the modified CONTAINER. */ |
52ce6436 PH |
9519 | |
9520 | static struct value * | |
9521 | assign_aggregate (struct value *container, | |
9522 | struct value *lhs, struct expression *exp, | |
9523 | int *pos, enum noside noside) | |
9524 | { | |
9525 | struct type *lhs_type; | |
9526 | int n = exp->elts[*pos+1].longconst; | |
9527 | LONGEST low_index, high_index; | |
52ce6436 | 9528 | int i; |
52ce6436 PH |
9529 | |
9530 | *pos += 3; | |
9531 | if (noside != EVAL_NORMAL) | |
9532 | { | |
52ce6436 PH |
9533 | for (i = 0; i < n; i += 1) |
9534 | ada_evaluate_subexp (NULL, exp, pos, noside); | |
9535 | return container; | |
9536 | } | |
9537 | ||
9538 | container = ada_coerce_ref (container); | |
9539 | if (ada_is_direct_array_type (value_type (container))) | |
9540 | container = ada_coerce_to_simple_array (container); | |
9541 | lhs = ada_coerce_ref (lhs); | |
9542 | if (!deprecated_value_modifiable (lhs)) | |
9543 | error (_("Left operand of assignment is not a modifiable lvalue.")); | |
9544 | ||
0e2da9f0 | 9545 | lhs_type = check_typedef (value_type (lhs)); |
52ce6436 PH |
9546 | if (ada_is_direct_array_type (lhs_type)) |
9547 | { | |
9548 | lhs = ada_coerce_to_simple_array (lhs); | |
0e2da9f0 | 9549 | lhs_type = check_typedef (value_type (lhs)); |
cf88be68 SM |
9550 | low_index = lhs_type->bounds ()->low.const_val (); |
9551 | high_index = lhs_type->bounds ()->high.const_val (); | |
52ce6436 | 9552 | } |
78134374 | 9553 | else if (lhs_type->code () == TYPE_CODE_STRUCT) |
52ce6436 PH |
9554 | { |
9555 | low_index = 0; | |
9556 | high_index = num_visible_fields (lhs_type) - 1; | |
52ce6436 PH |
9557 | } |
9558 | else | |
9559 | error (_("Left-hand side must be array or record.")); | |
9560 | ||
cf608cc4 | 9561 | std::vector<LONGEST> indices (4); |
52ce6436 PH |
9562 | indices[0] = indices[1] = low_index - 1; |
9563 | indices[2] = indices[3] = high_index + 1; | |
52ce6436 PH |
9564 | |
9565 | for (i = 0; i < n; i += 1) | |
9566 | { | |
9567 | switch (exp->elts[*pos].opcode) | |
9568 | { | |
1fbf5ada | 9569 | case OP_CHOICES: |
cf608cc4 | 9570 | aggregate_assign_from_choices (container, lhs, exp, pos, indices, |
1fbf5ada JB |
9571 | low_index, high_index); |
9572 | break; | |
9573 | case OP_POSITIONAL: | |
9574 | aggregate_assign_positional (container, lhs, exp, pos, indices, | |
52ce6436 | 9575 | low_index, high_index); |
1fbf5ada JB |
9576 | break; |
9577 | case OP_OTHERS: | |
9578 | if (i != n-1) | |
9579 | error (_("Misplaced 'others' clause")); | |
cf608cc4 TT |
9580 | aggregate_assign_others (container, lhs, exp, pos, indices, |
9581 | low_index, high_index); | |
1fbf5ada JB |
9582 | break; |
9583 | default: | |
9584 | error (_("Internal error: bad aggregate clause")); | |
52ce6436 PH |
9585 | } |
9586 | } | |
9587 | ||
9588 | return container; | |
9589 | } | |
9590 | ||
9591 | /* Assign into the component of LHS indexed by the OP_POSITIONAL | |
9592 | construct at *POS, updating *POS past the construct, given that | |
cf608cc4 TT |
9593 | the positions are relative to lower bound LOW, where HIGH is the |
9594 | upper bound. Record the position in INDICES. CONTAINER is as for | |
0963b4bd | 9595 | assign_aggregate. */ |
52ce6436 PH |
9596 | static void |
9597 | aggregate_assign_positional (struct value *container, | |
9598 | struct value *lhs, struct expression *exp, | |
cf608cc4 TT |
9599 | int *pos, std::vector<LONGEST> &indices, |
9600 | LONGEST low, LONGEST high) | |
52ce6436 PH |
9601 | { |
9602 | LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low; | |
9603 | ||
9604 | if (ind - 1 == high) | |
e1d5a0d2 | 9605 | warning (_("Extra components in aggregate ignored.")); |
52ce6436 PH |
9606 | if (ind <= high) |
9607 | { | |
cf608cc4 | 9608 | add_component_interval (ind, ind, indices); |
52ce6436 PH |
9609 | *pos += 3; |
9610 | assign_component (container, lhs, ind, exp, pos); | |
9611 | } | |
9612 | else | |
9613 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9614 | } | |
9615 | ||
9616 | /* Assign into the components of LHS indexed by the OP_CHOICES | |
9617 | construct at *POS, updating *POS past the construct, given that | |
9618 | the allowable indices are LOW..HIGH. Record the indices assigned | |
cf608cc4 | 9619 | to in INDICES. CONTAINER is as for assign_aggregate. */ |
52ce6436 PH |
9620 | static void |
9621 | aggregate_assign_from_choices (struct value *container, | |
9622 | struct value *lhs, struct expression *exp, | |
cf608cc4 TT |
9623 | int *pos, std::vector<LONGEST> &indices, |
9624 | LONGEST low, LONGEST high) | |
52ce6436 PH |
9625 | { |
9626 | int j; | |
9627 | int n_choices = longest_to_int (exp->elts[*pos+1].longconst); | |
9628 | int choice_pos, expr_pc; | |
9629 | int is_array = ada_is_direct_array_type (value_type (lhs)); | |
9630 | ||
9631 | choice_pos = *pos += 3; | |
9632 | ||
9633 | for (j = 0; j < n_choices; j += 1) | |
9634 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9635 | expr_pc = *pos; | |
9636 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9637 | ||
9638 | for (j = 0; j < n_choices; j += 1) | |
9639 | { | |
9640 | LONGEST lower, upper; | |
9641 | enum exp_opcode op = exp->elts[choice_pos].opcode; | |
5b4ee69b | 9642 | |
52ce6436 PH |
9643 | if (op == OP_DISCRETE_RANGE) |
9644 | { | |
9645 | choice_pos += 1; | |
9646 | lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos, | |
9647 | EVAL_NORMAL)); | |
9648 | upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos, | |
9649 | EVAL_NORMAL)); | |
9650 | } | |
9651 | else if (is_array) | |
9652 | { | |
9653 | lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos, | |
9654 | EVAL_NORMAL)); | |
9655 | upper = lower; | |
9656 | } | |
9657 | else | |
9658 | { | |
9659 | int ind; | |
0d5cff50 | 9660 | const char *name; |
5b4ee69b | 9661 | |
52ce6436 PH |
9662 | switch (op) |
9663 | { | |
9664 | case OP_NAME: | |
9665 | name = &exp->elts[choice_pos + 2].string; | |
9666 | break; | |
9667 | case OP_VAR_VALUE: | |
987012b8 | 9668 | name = exp->elts[choice_pos + 2].symbol->natural_name (); |
52ce6436 PH |
9669 | break; |
9670 | default: | |
9671 | error (_("Invalid record component association.")); | |
9672 | } | |
9673 | ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP); | |
9674 | ind = 0; | |
9675 | if (! find_struct_field (name, value_type (lhs), 0, | |
9676 | NULL, NULL, NULL, NULL, &ind)) | |
9677 | error (_("Unknown component name: %s."), name); | |
9678 | lower = upper = ind; | |
9679 | } | |
9680 | ||
9681 | if (lower <= upper && (lower < low || upper > high)) | |
9682 | error (_("Index in component association out of bounds.")); | |
9683 | ||
cf608cc4 | 9684 | add_component_interval (lower, upper, indices); |
52ce6436 PH |
9685 | while (lower <= upper) |
9686 | { | |
9687 | int pos1; | |
5b4ee69b | 9688 | |
52ce6436 PH |
9689 | pos1 = expr_pc; |
9690 | assign_component (container, lhs, lower, exp, &pos1); | |
9691 | lower += 1; | |
9692 | } | |
9693 | } | |
9694 | } | |
9695 | ||
9696 | /* Assign the value of the expression in the OP_OTHERS construct in | |
9697 | EXP at *POS into the components of LHS indexed from LOW .. HIGH that | |
9698 | have not been previously assigned. The index intervals already assigned | |
cf608cc4 TT |
9699 | are in INDICES. Updates *POS to after the OP_OTHERS clause. |
9700 | CONTAINER is as for assign_aggregate. */ | |
52ce6436 PH |
9701 | static void |
9702 | aggregate_assign_others (struct value *container, | |
9703 | struct value *lhs, struct expression *exp, | |
cf608cc4 | 9704 | int *pos, std::vector<LONGEST> &indices, |
52ce6436 PH |
9705 | LONGEST low, LONGEST high) |
9706 | { | |
9707 | int i; | |
5ce64950 | 9708 | int expr_pc = *pos + 1; |
52ce6436 | 9709 | |
cf608cc4 | 9710 | int num_indices = indices.size (); |
52ce6436 PH |
9711 | for (i = 0; i < num_indices - 2; i += 2) |
9712 | { | |
9713 | LONGEST ind; | |
5b4ee69b | 9714 | |
52ce6436 PH |
9715 | for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1) |
9716 | { | |
5ce64950 | 9717 | int localpos; |
5b4ee69b | 9718 | |
5ce64950 MS |
9719 | localpos = expr_pc; |
9720 | assign_component (container, lhs, ind, exp, &localpos); | |
52ce6436 PH |
9721 | } |
9722 | } | |
9723 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9724 | } | |
9725 | ||
cf608cc4 TT |
9726 | /* Add the interval [LOW .. HIGH] to the sorted set of intervals |
9727 | [ INDICES[0] .. INDICES[1] ],... The resulting intervals do not | |
9728 | overlap. */ | |
52ce6436 PH |
9729 | static void |
9730 | add_component_interval (LONGEST low, LONGEST high, | |
cf608cc4 | 9731 | std::vector<LONGEST> &indices) |
52ce6436 PH |
9732 | { |
9733 | int i, j; | |
5b4ee69b | 9734 | |
cf608cc4 TT |
9735 | int size = indices.size (); |
9736 | for (i = 0; i < size; i += 2) { | |
52ce6436 PH |
9737 | if (high >= indices[i] && low <= indices[i + 1]) |
9738 | { | |
9739 | int kh; | |
5b4ee69b | 9740 | |
cf608cc4 | 9741 | for (kh = i + 2; kh < size; kh += 2) |
52ce6436 PH |
9742 | if (high < indices[kh]) |
9743 | break; | |
9744 | if (low < indices[i]) | |
9745 | indices[i] = low; | |
9746 | indices[i + 1] = indices[kh - 1]; | |
9747 | if (high > indices[i + 1]) | |
9748 | indices[i + 1] = high; | |
cf608cc4 TT |
9749 | memcpy (indices.data () + i + 2, indices.data () + kh, size - kh); |
9750 | indices.resize (kh - i - 2); | |
52ce6436 PH |
9751 | return; |
9752 | } | |
9753 | else if (high < indices[i]) | |
9754 | break; | |
9755 | } | |
9756 | ||
cf608cc4 TT |
9757 | indices.resize (indices.size () + 2); |
9758 | for (j = size - 1; j >= i + 2; j -= 1) | |
52ce6436 PH |
9759 | indices[j] = indices[j - 2]; |
9760 | indices[i] = low; | |
9761 | indices[i + 1] = high; | |
9762 | } | |
9763 | ||
6e48bd2c JB |
9764 | /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2 |
9765 | is different. */ | |
9766 | ||
9767 | static struct value * | |
b7e22850 | 9768 | ada_value_cast (struct type *type, struct value *arg2) |
6e48bd2c JB |
9769 | { |
9770 | if (type == ada_check_typedef (value_type (arg2))) | |
9771 | return arg2; | |
9772 | ||
b2188a06 | 9773 | if (ada_is_gnat_encoded_fixed_point_type (type)) |
75f24e86 | 9774 | return cast_to_gnat_encoded_fixed_point_type (type, arg2); |
6e48bd2c | 9775 | |
b2188a06 | 9776 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
75f24e86 | 9777 | return cast_from_gnat_encoded_fixed_point_type (type, arg2); |
6e48bd2c JB |
9778 | |
9779 | return value_cast (type, arg2); | |
9780 | } | |
9781 | ||
284614f0 JB |
9782 | /* Evaluating Ada expressions, and printing their result. |
9783 | ------------------------------------------------------ | |
9784 | ||
21649b50 JB |
9785 | 1. Introduction: |
9786 | ---------------- | |
9787 | ||
284614f0 JB |
9788 | We usually evaluate an Ada expression in order to print its value. |
9789 | We also evaluate an expression in order to print its type, which | |
9790 | happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation, | |
9791 | but we'll focus mostly on the EVAL_NORMAL phase. In practice, the | |
9792 | EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of | |
9793 | the evaluation compared to the EVAL_NORMAL, but is otherwise very | |
9794 | similar. | |
9795 | ||
9796 | Evaluating expressions is a little more complicated for Ada entities | |
9797 | than it is for entities in languages such as C. The main reason for | |
9798 | this is that Ada provides types whose definition might be dynamic. | |
9799 | One example of such types is variant records. Or another example | |
9800 | would be an array whose bounds can only be known at run time. | |
9801 | ||
9802 | The following description is a general guide as to what should be | |
9803 | done (and what should NOT be done) in order to evaluate an expression | |
9804 | involving such types, and when. This does not cover how the semantic | |
9805 | information is encoded by GNAT as this is covered separatly. For the | |
9806 | document used as the reference for the GNAT encoding, see exp_dbug.ads | |
9807 | in the GNAT sources. | |
9808 | ||
9809 | Ideally, we should embed each part of this description next to its | |
9810 | associated code. Unfortunately, the amount of code is so vast right | |
9811 | now that it's hard to see whether the code handling a particular | |
9812 | situation might be duplicated or not. One day, when the code is | |
9813 | cleaned up, this guide might become redundant with the comments | |
9814 | inserted in the code, and we might want to remove it. | |
9815 | ||
21649b50 JB |
9816 | 2. ``Fixing'' an Entity, the Simple Case: |
9817 | ----------------------------------------- | |
9818 | ||
284614f0 JB |
9819 | When evaluating Ada expressions, the tricky issue is that they may |
9820 | reference entities whose type contents and size are not statically | |
9821 | known. Consider for instance a variant record: | |
9822 | ||
9823 | type Rec (Empty : Boolean := True) is record | |
dda83cd7 SM |
9824 | case Empty is |
9825 | when True => null; | |
9826 | when False => Value : Integer; | |
9827 | end case; | |
284614f0 JB |
9828 | end record; |
9829 | Yes : Rec := (Empty => False, Value => 1); | |
9830 | No : Rec := (empty => True); | |
9831 | ||
9832 | The size and contents of that record depends on the value of the | |
9833 | descriminant (Rec.Empty). At this point, neither the debugging | |
9834 | information nor the associated type structure in GDB are able to | |
9835 | express such dynamic types. So what the debugger does is to create | |
9836 | "fixed" versions of the type that applies to the specific object. | |
30baf67b | 9837 | We also informally refer to this operation as "fixing" an object, |
284614f0 JB |
9838 | which means creating its associated fixed type. |
9839 | ||
9840 | Example: when printing the value of variable "Yes" above, its fixed | |
9841 | type would look like this: | |
9842 | ||
9843 | type Rec is record | |
dda83cd7 SM |
9844 | Empty : Boolean; |
9845 | Value : Integer; | |
284614f0 JB |
9846 | end record; |
9847 | ||
9848 | On the other hand, if we printed the value of "No", its fixed type | |
9849 | would become: | |
9850 | ||
9851 | type Rec is record | |
dda83cd7 | 9852 | Empty : Boolean; |
284614f0 JB |
9853 | end record; |
9854 | ||
9855 | Things become a little more complicated when trying to fix an entity | |
9856 | with a dynamic type that directly contains another dynamic type, | |
9857 | such as an array of variant records, for instance. There are | |
9858 | two possible cases: Arrays, and records. | |
9859 | ||
21649b50 JB |
9860 | 3. ``Fixing'' Arrays: |
9861 | --------------------- | |
9862 | ||
9863 | The type structure in GDB describes an array in terms of its bounds, | |
9864 | and the type of its elements. By design, all elements in the array | |
9865 | have the same type and we cannot represent an array of variant elements | |
9866 | using the current type structure in GDB. When fixing an array, | |
9867 | we cannot fix the array element, as we would potentially need one | |
9868 | fixed type per element of the array. As a result, the best we can do | |
9869 | when fixing an array is to produce an array whose bounds and size | |
9870 | are correct (allowing us to read it from memory), but without having | |
9871 | touched its element type. Fixing each element will be done later, | |
9872 | when (if) necessary. | |
9873 | ||
9874 | Arrays are a little simpler to handle than records, because the same | |
9875 | amount of memory is allocated for each element of the array, even if | |
1b536f04 | 9876 | the amount of space actually used by each element differs from element |
21649b50 | 9877 | to element. Consider for instance the following array of type Rec: |
284614f0 JB |
9878 | |
9879 | type Rec_Array is array (1 .. 2) of Rec; | |
9880 | ||
1b536f04 JB |
9881 | The actual amount of memory occupied by each element might be different |
9882 | from element to element, depending on the value of their discriminant. | |
21649b50 | 9883 | But the amount of space reserved for each element in the array remains |
1b536f04 | 9884 | fixed regardless. So we simply need to compute that size using |
21649b50 JB |
9885 | the debugging information available, from which we can then determine |
9886 | the array size (we multiply the number of elements of the array by | |
9887 | the size of each element). | |
9888 | ||
9889 | The simplest case is when we have an array of a constrained element | |
9890 | type. For instance, consider the following type declarations: | |
9891 | ||
dda83cd7 SM |
9892 | type Bounded_String (Max_Size : Integer) is |
9893 | Length : Integer; | |
9894 | Buffer : String (1 .. Max_Size); | |
9895 | end record; | |
9896 | type Bounded_String_Array is array (1 ..2) of Bounded_String (80); | |
21649b50 JB |
9897 | |
9898 | In this case, the compiler describes the array as an array of | |
9899 | variable-size elements (identified by its XVS suffix) for which | |
9900 | the size can be read in the parallel XVZ variable. | |
9901 | ||
9902 | In the case of an array of an unconstrained element type, the compiler | |
9903 | wraps the array element inside a private PAD type. This type should not | |
9904 | be shown to the user, and must be "unwrap"'ed before printing. Note | |
284614f0 JB |
9905 | that we also use the adjective "aligner" in our code to designate |
9906 | these wrapper types. | |
9907 | ||
1b536f04 | 9908 | In some cases, the size allocated for each element is statically |
21649b50 JB |
9909 | known. In that case, the PAD type already has the correct size, |
9910 | and the array element should remain unfixed. | |
9911 | ||
9912 | But there are cases when this size is not statically known. | |
9913 | For instance, assuming that "Five" is an integer variable: | |
284614f0 | 9914 | |
dda83cd7 SM |
9915 | type Dynamic is array (1 .. Five) of Integer; |
9916 | type Wrapper (Has_Length : Boolean := False) is record | |
9917 | Data : Dynamic; | |
9918 | case Has_Length is | |
9919 | when True => Length : Integer; | |
9920 | when False => null; | |
9921 | end case; | |
9922 | end record; | |
9923 | type Wrapper_Array is array (1 .. 2) of Wrapper; | |
284614f0 | 9924 | |
dda83cd7 SM |
9925 | Hello : Wrapper_Array := (others => (Has_Length => True, |
9926 | Data => (others => 17), | |
9927 | Length => 1)); | |
284614f0 JB |
9928 | |
9929 | ||
9930 | The debugging info would describe variable Hello as being an | |
9931 | array of a PAD type. The size of that PAD type is not statically | |
9932 | known, but can be determined using a parallel XVZ variable. | |
9933 | In that case, a copy of the PAD type with the correct size should | |
9934 | be used for the fixed array. | |
9935 | ||
21649b50 JB |
9936 | 3. ``Fixing'' record type objects: |
9937 | ---------------------------------- | |
9938 | ||
9939 | Things are slightly different from arrays in the case of dynamic | |
284614f0 JB |
9940 | record types. In this case, in order to compute the associated |
9941 | fixed type, we need to determine the size and offset of each of | |
9942 | its components. This, in turn, requires us to compute the fixed | |
9943 | type of each of these components. | |
9944 | ||
9945 | Consider for instance the example: | |
9946 | ||
dda83cd7 SM |
9947 | type Bounded_String (Max_Size : Natural) is record |
9948 | Str : String (1 .. Max_Size); | |
9949 | Length : Natural; | |
9950 | end record; | |
9951 | My_String : Bounded_String (Max_Size => 10); | |
284614f0 JB |
9952 | |
9953 | In that case, the position of field "Length" depends on the size | |
9954 | of field Str, which itself depends on the value of the Max_Size | |
21649b50 | 9955 | discriminant. In order to fix the type of variable My_String, |
284614f0 JB |
9956 | we need to fix the type of field Str. Therefore, fixing a variant |
9957 | record requires us to fix each of its components. | |
9958 | ||
9959 | However, if a component does not have a dynamic size, the component | |
9960 | should not be fixed. In particular, fields that use a PAD type | |
9961 | should not fixed. Here is an example where this might happen | |
9962 | (assuming type Rec above): | |
9963 | ||
9964 | type Container (Big : Boolean) is record | |
dda83cd7 SM |
9965 | First : Rec; |
9966 | After : Integer; | |
9967 | case Big is | |
9968 | when True => Another : Integer; | |
9969 | when False => null; | |
9970 | end case; | |
284614f0 JB |
9971 | end record; |
9972 | My_Container : Container := (Big => False, | |
dda83cd7 SM |
9973 | First => (Empty => True), |
9974 | After => 42); | |
284614f0 JB |
9975 | |
9976 | In that example, the compiler creates a PAD type for component First, | |
9977 | whose size is constant, and then positions the component After just | |
9978 | right after it. The offset of component After is therefore constant | |
9979 | in this case. | |
9980 | ||
9981 | The debugger computes the position of each field based on an algorithm | |
9982 | that uses, among other things, the actual position and size of the field | |
21649b50 JB |
9983 | preceding it. Let's now imagine that the user is trying to print |
9984 | the value of My_Container. If the type fixing was recursive, we would | |
284614f0 JB |
9985 | end up computing the offset of field After based on the size of the |
9986 | fixed version of field First. And since in our example First has | |
9987 | only one actual field, the size of the fixed type is actually smaller | |
9988 | than the amount of space allocated to that field, and thus we would | |
9989 | compute the wrong offset of field After. | |
9990 | ||
21649b50 JB |
9991 | To make things more complicated, we need to watch out for dynamic |
9992 | components of variant records (identified by the ___XVL suffix in | |
9993 | the component name). Even if the target type is a PAD type, the size | |
9994 | of that type might not be statically known. So the PAD type needs | |
9995 | to be unwrapped and the resulting type needs to be fixed. Otherwise, | |
9996 | we might end up with the wrong size for our component. This can be | |
9997 | observed with the following type declarations: | |
284614f0 | 9998 | |
dda83cd7 SM |
9999 | type Octal is new Integer range 0 .. 7; |
10000 | type Octal_Array is array (Positive range <>) of Octal; | |
10001 | pragma Pack (Octal_Array); | |
284614f0 | 10002 | |
dda83cd7 SM |
10003 | type Octal_Buffer (Size : Positive) is record |
10004 | Buffer : Octal_Array (1 .. Size); | |
10005 | Length : Integer; | |
10006 | end record; | |
284614f0 JB |
10007 | |
10008 | In that case, Buffer is a PAD type whose size is unset and needs | |
10009 | to be computed by fixing the unwrapped type. | |
10010 | ||
21649b50 JB |
10011 | 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity: |
10012 | ---------------------------------------------------------- | |
10013 | ||
10014 | Lastly, when should the sub-elements of an entity that remained unfixed | |
284614f0 JB |
10015 | thus far, be actually fixed? |
10016 | ||
10017 | The answer is: Only when referencing that element. For instance | |
10018 | when selecting one component of a record, this specific component | |
10019 | should be fixed at that point in time. Or when printing the value | |
10020 | of a record, each component should be fixed before its value gets | |
10021 | printed. Similarly for arrays, the element of the array should be | |
10022 | fixed when printing each element of the array, or when extracting | |
10023 | one element out of that array. On the other hand, fixing should | |
10024 | not be performed on the elements when taking a slice of an array! | |
10025 | ||
31432a67 | 10026 | Note that one of the side effects of miscomputing the offset and |
284614f0 JB |
10027 | size of each field is that we end up also miscomputing the size |
10028 | of the containing type. This can have adverse results when computing | |
10029 | the value of an entity. GDB fetches the value of an entity based | |
10030 | on the size of its type, and thus a wrong size causes GDB to fetch | |
10031 | the wrong amount of memory. In the case where the computed size is | |
10032 | too small, GDB fetches too little data to print the value of our | |
31432a67 | 10033 | entity. Results in this case are unpredictable, as we usually read |
284614f0 JB |
10034 | past the buffer containing the data =:-o. */ |
10035 | ||
ced9779b JB |
10036 | /* Evaluate a subexpression of EXP, at index *POS, and return a value |
10037 | for that subexpression cast to TO_TYPE. Advance *POS over the | |
10038 | subexpression. */ | |
10039 | ||
10040 | static value * | |
10041 | ada_evaluate_subexp_for_cast (expression *exp, int *pos, | |
10042 | enum noside noside, struct type *to_type) | |
10043 | { | |
10044 | int pc = *pos; | |
10045 | ||
10046 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE | |
10047 | || exp->elts[pc].opcode == OP_VAR_VALUE) | |
10048 | { | |
10049 | (*pos) += 4; | |
10050 | ||
10051 | value *val; | |
10052 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE) | |
dda83cd7 SM |
10053 | { |
10054 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10055 | return value_zero (to_type, not_lval); | |
10056 | ||
10057 | val = evaluate_var_msym_value (noside, | |
10058 | exp->elts[pc + 1].objfile, | |
10059 | exp->elts[pc + 2].msymbol); | |
10060 | } | |
ced9779b | 10061 | else |
dda83cd7 SM |
10062 | val = evaluate_var_value (noside, |
10063 | exp->elts[pc + 1].block, | |
10064 | exp->elts[pc + 2].symbol); | |
ced9779b JB |
10065 | |
10066 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10067 | return eval_skip_value (exp); |
ced9779b JB |
10068 | |
10069 | val = ada_value_cast (to_type, val); | |
10070 | ||
10071 | /* Follow the Ada language semantics that do not allow taking | |
10072 | an address of the result of a cast (view conversion in Ada). */ | |
10073 | if (VALUE_LVAL (val) == lval_memory) | |
dda83cd7 SM |
10074 | { |
10075 | if (value_lazy (val)) | |
10076 | value_fetch_lazy (val); | |
10077 | VALUE_LVAL (val) = not_lval; | |
10078 | } | |
ced9779b JB |
10079 | return val; |
10080 | } | |
10081 | ||
10082 | value *val = evaluate_subexp (to_type, exp, pos, noside); | |
10083 | if (noside == EVAL_SKIP) | |
10084 | return eval_skip_value (exp); | |
10085 | return ada_value_cast (to_type, val); | |
10086 | } | |
10087 | ||
284614f0 JB |
10088 | /* Implement the evaluate_exp routine in the exp_descriptor structure |
10089 | for the Ada language. */ | |
10090 | ||
52ce6436 | 10091 | static struct value * |
ebf56fd3 | 10092 | ada_evaluate_subexp (struct type *expect_type, struct expression *exp, |
dda83cd7 | 10093 | int *pos, enum noside noside) |
14f9c5c9 AS |
10094 | { |
10095 | enum exp_opcode op; | |
b5385fc0 | 10096 | int tem; |
14f9c5c9 | 10097 | int pc; |
5ec18f2b | 10098 | int preeval_pos; |
14f9c5c9 AS |
10099 | struct value *arg1 = NULL, *arg2 = NULL, *arg3; |
10100 | struct type *type; | |
52ce6436 | 10101 | int nargs, oplen; |
d2e4a39e | 10102 | struct value **argvec; |
14f9c5c9 | 10103 | |
d2e4a39e AS |
10104 | pc = *pos; |
10105 | *pos += 1; | |
14f9c5c9 AS |
10106 | op = exp->elts[pc].opcode; |
10107 | ||
d2e4a39e | 10108 | switch (op) |
14f9c5c9 AS |
10109 | { |
10110 | default: | |
10111 | *pos -= 1; | |
6e48bd2c | 10112 | arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); |
ca1f964d JG |
10113 | |
10114 | if (noside == EVAL_NORMAL) | |
10115 | arg1 = unwrap_value (arg1); | |
6e48bd2c | 10116 | |
edd079d9 | 10117 | /* If evaluating an OP_FLOAT and an EXPECT_TYPE was provided, |
dda83cd7 SM |
10118 | then we need to perform the conversion manually, because |
10119 | evaluate_subexp_standard doesn't do it. This conversion is | |
10120 | necessary in Ada because the different kinds of float/fixed | |
10121 | types in Ada have different representations. | |
6e48bd2c | 10122 | |
dda83cd7 SM |
10123 | Similarly, we need to perform the conversion from OP_LONG |
10124 | ourselves. */ | |
edd079d9 | 10125 | if ((op == OP_FLOAT || op == OP_LONG) && expect_type != NULL) |
dda83cd7 | 10126 | arg1 = ada_value_cast (expect_type, arg1); |
6e48bd2c JB |
10127 | |
10128 | return arg1; | |
4c4b4cd2 PH |
10129 | |
10130 | case OP_STRING: | |
10131 | { | |
dda83cd7 SM |
10132 | struct value *result; |
10133 | ||
10134 | *pos -= 1; | |
10135 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
10136 | /* The result type will have code OP_STRING, bashed there from | |
10137 | OP_ARRAY. Bash it back. */ | |
10138 | if (value_type (result)->code () == TYPE_CODE_STRING) | |
10139 | value_type (result)->set_code (TYPE_CODE_ARRAY); | |
10140 | return result; | |
4c4b4cd2 | 10141 | } |
14f9c5c9 AS |
10142 | |
10143 | case UNOP_CAST: | |
10144 | (*pos) += 2; | |
10145 | type = exp->elts[pc + 1].type; | |
ced9779b | 10146 | return ada_evaluate_subexp_for_cast (exp, pos, noside, type); |
14f9c5c9 | 10147 | |
4c4b4cd2 PH |
10148 | case UNOP_QUAL: |
10149 | (*pos) += 2; | |
10150 | type = exp->elts[pc + 1].type; | |
10151 | return ada_evaluate_subexp (type, exp, pos, noside); | |
10152 | ||
14f9c5c9 | 10153 | case BINOP_ASSIGN: |
fe1fe7ea | 10154 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
52ce6436 PH |
10155 | if (exp->elts[*pos].opcode == OP_AGGREGATE) |
10156 | { | |
10157 | arg1 = assign_aggregate (arg1, arg1, exp, pos, noside); | |
10158 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
10159 | return arg1; | |
10160 | return ada_value_assign (arg1, arg1); | |
10161 | } | |
003f3813 | 10162 | /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1, |
dda83cd7 SM |
10163 | except if the lhs of our assignment is a convenience variable. |
10164 | In the case of assigning to a convenience variable, the lhs | |
10165 | should be exactly the result of the evaluation of the rhs. */ | |
003f3813 JB |
10166 | type = value_type (arg1); |
10167 | if (VALUE_LVAL (arg1) == lval_internalvar) | |
dda83cd7 | 10168 | type = NULL; |
003f3813 | 10169 | arg2 = evaluate_subexp (type, exp, pos, noside); |
14f9c5c9 | 10170 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10171 | return arg1; |
f411722c TT |
10172 | if (VALUE_LVAL (arg1) == lval_internalvar) |
10173 | { | |
10174 | /* Nothing. */ | |
10175 | } | |
b2188a06 | 10176 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) |
dda83cd7 | 10177 | arg2 = cast_to_gnat_encoded_fixed_point_type (value_type (arg1), arg2); |
b2188a06 | 10178 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
dda83cd7 SM |
10179 | error |
10180 | (_("Fixed-point values must be assigned to fixed-point variables")); | |
d2e4a39e | 10181 | else |
dda83cd7 | 10182 | arg2 = coerce_for_assign (value_type (arg1), arg2); |
4c4b4cd2 | 10183 | return ada_value_assign (arg1, arg2); |
14f9c5c9 AS |
10184 | |
10185 | case BINOP_ADD: | |
10186 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10187 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10188 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10189 | goto nosideret; |
78134374 | 10190 | if (value_type (arg1)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10191 | return (value_from_longest |
10192 | (value_type (arg1), | |
10193 | value_as_long (arg1) + value_as_long (arg2))); | |
78134374 | 10194 | if (value_type (arg2)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10195 | return (value_from_longest |
10196 | (value_type (arg2), | |
10197 | value_as_long (arg1) + value_as_long (arg2))); | |
b2188a06 | 10198 | if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1)) |
dda83cd7 SM |
10199 | || ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
10200 | && value_type (arg1) != value_type (arg2)) | |
10201 | error (_("Operands of fixed-point addition must have the same type")); | |
b7789565 | 10202 | /* Do the addition, and cast the result to the type of the first |
dda83cd7 SM |
10203 | argument. We cannot cast the result to a reference type, so if |
10204 | ARG1 is a reference type, find its underlying type. */ | |
b7789565 | 10205 | type = value_type (arg1); |
78134374 | 10206 | while (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10207 | type = TYPE_TARGET_TYPE (type); |
f44316fa | 10208 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
89eef114 | 10209 | return value_cast (type, value_binop (arg1, arg2, BINOP_ADD)); |
14f9c5c9 AS |
10210 | |
10211 | case BINOP_SUB: | |
10212 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10213 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10214 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10215 | goto nosideret; |
78134374 | 10216 | if (value_type (arg1)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10217 | return (value_from_longest |
10218 | (value_type (arg1), | |
10219 | value_as_long (arg1) - value_as_long (arg2))); | |
78134374 | 10220 | if (value_type (arg2)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10221 | return (value_from_longest |
10222 | (value_type (arg2), | |
10223 | value_as_long (arg1) - value_as_long (arg2))); | |
b2188a06 | 10224 | if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1)) |
dda83cd7 SM |
10225 | || ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
10226 | && value_type (arg1) != value_type (arg2)) | |
10227 | error (_("Operands of fixed-point subtraction " | |
0963b4bd | 10228 | "must have the same type")); |
b7789565 | 10229 | /* Do the substraction, and cast the result to the type of the first |
dda83cd7 SM |
10230 | argument. We cannot cast the result to a reference type, so if |
10231 | ARG1 is a reference type, find its underlying type. */ | |
b7789565 | 10232 | type = value_type (arg1); |
78134374 | 10233 | while (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10234 | type = TYPE_TARGET_TYPE (type); |
f44316fa | 10235 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
89eef114 | 10236 | return value_cast (type, value_binop (arg1, arg2, BINOP_SUB)); |
14f9c5c9 AS |
10237 | |
10238 | case BINOP_MUL: | |
10239 | case BINOP_DIV: | |
e1578042 JB |
10240 | case BINOP_REM: |
10241 | case BINOP_MOD: | |
fe1fe7ea SM |
10242 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10243 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10244 | if (noside == EVAL_SKIP) |
dda83cd7 | 10245 | goto nosideret; |
e1578042 | 10246 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
10247 | { |
10248 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10249 | return value_zero (value_type (arg1), not_lval); | |
10250 | } | |
14f9c5c9 | 10251 | else |
dda83cd7 SM |
10252 | { |
10253 | type = builtin_type (exp->gdbarch)->builtin_double; | |
10254 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) | |
10255 | arg1 = cast_from_gnat_encoded_fixed_point_type (type, arg1); | |
10256 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) | |
10257 | arg2 = cast_from_gnat_encoded_fixed_point_type (type, arg2); | |
10258 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10259 | return ada_value_binop (arg1, arg2, op); | |
10260 | } | |
4c4b4cd2 | 10261 | |
4c4b4cd2 PH |
10262 | case BINOP_EQUAL: |
10263 | case BINOP_NOTEQUAL: | |
fe1fe7ea | 10264 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 10265 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
14f9c5c9 | 10266 | if (noside == EVAL_SKIP) |
dda83cd7 | 10267 | goto nosideret; |
4c4b4cd2 | 10268 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10269 | tem = 0; |
4c4b4cd2 | 10270 | else |
f44316fa UW |
10271 | { |
10272 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10273 | tem = ada_value_equal (arg1, arg2); | |
10274 | } | |
4c4b4cd2 | 10275 | if (op == BINOP_NOTEQUAL) |
dda83cd7 | 10276 | tem = !tem; |
fbb06eb1 UW |
10277 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10278 | return value_from_longest (type, (LONGEST) tem); | |
4c4b4cd2 PH |
10279 | |
10280 | case UNOP_NEG: | |
fe1fe7ea | 10281 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10282 | if (noside == EVAL_SKIP) |
dda83cd7 | 10283 | goto nosideret; |
b2188a06 | 10284 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) |
dda83cd7 | 10285 | return value_cast (value_type (arg1), value_neg (arg1)); |
14f9c5c9 | 10286 | else |
f44316fa UW |
10287 | { |
10288 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
10289 | return value_neg (arg1); | |
10290 | } | |
4c4b4cd2 | 10291 | |
2330c6c6 JB |
10292 | case BINOP_LOGICAL_AND: |
10293 | case BINOP_LOGICAL_OR: | |
10294 | case UNOP_LOGICAL_NOT: | |
000d5124 | 10295 | { |
dda83cd7 | 10296 | struct value *val; |
000d5124 | 10297 | |
dda83cd7 SM |
10298 | *pos -= 1; |
10299 | val = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
fbb06eb1 | 10300 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
dda83cd7 | 10301 | return value_cast (type, val); |
000d5124 | 10302 | } |
2330c6c6 JB |
10303 | |
10304 | case BINOP_BITWISE_AND: | |
10305 | case BINOP_BITWISE_IOR: | |
10306 | case BINOP_BITWISE_XOR: | |
000d5124 | 10307 | { |
dda83cd7 | 10308 | struct value *val; |
000d5124 | 10309 | |
fe1fe7ea SM |
10310 | arg1 = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
10311 | *pos = pc; | |
dda83cd7 | 10312 | val = evaluate_subexp_standard (expect_type, exp, pos, noside); |
000d5124 | 10313 | |
dda83cd7 | 10314 | return value_cast (value_type (arg1), val); |
000d5124 | 10315 | } |
2330c6c6 | 10316 | |
14f9c5c9 AS |
10317 | case OP_VAR_VALUE: |
10318 | *pos -= 1; | |
6799def4 | 10319 | |
14f9c5c9 | 10320 | if (noside == EVAL_SKIP) |
dda83cd7 SM |
10321 | { |
10322 | *pos += 4; | |
10323 | goto nosideret; | |
10324 | } | |
da5c522f JB |
10325 | |
10326 | if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN) | |
dda83cd7 SM |
10327 | /* Only encountered when an unresolved symbol occurs in a |
10328 | context other than a function call, in which case, it is | |
10329 | invalid. */ | |
10330 | error (_("Unexpected unresolved symbol, %s, during evaluation"), | |
10331 | exp->elts[pc + 2].symbol->print_name ()); | |
da5c522f JB |
10332 | |
10333 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
dda83cd7 SM |
10334 | { |
10335 | type = static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol)); | |
10336 | /* Check to see if this is a tagged type. We also need to handle | |
10337 | the case where the type is a reference to a tagged type, but | |
10338 | we have to be careful to exclude pointers to tagged types. | |
10339 | The latter should be shown as usual (as a pointer), whereas | |
10340 | a reference should mostly be transparent to the user. */ | |
10341 | if (ada_is_tagged_type (type, 0) | |
10342 | || (type->code () == TYPE_CODE_REF | |
10343 | && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0))) | |
0d72a7c3 JB |
10344 | { |
10345 | /* Tagged types are a little special in the fact that the real | |
10346 | type is dynamic and can only be determined by inspecting the | |
10347 | object's tag. This means that we need to get the object's | |
10348 | value first (EVAL_NORMAL) and then extract the actual object | |
10349 | type from its tag. | |
10350 | ||
10351 | Note that we cannot skip the final step where we extract | |
10352 | the object type from its tag, because the EVAL_NORMAL phase | |
10353 | results in dynamic components being resolved into fixed ones. | |
10354 | This can cause problems when trying to print the type | |
10355 | description of tagged types whose parent has a dynamic size: | |
10356 | We use the type name of the "_parent" component in order | |
10357 | to print the name of the ancestor type in the type description. | |
10358 | If that component had a dynamic size, the resolution into | |
10359 | a fixed type would result in the loss of that type name, | |
10360 | thus preventing us from printing the name of the ancestor | |
10361 | type in the type description. */ | |
fe1fe7ea | 10362 | arg1 = evaluate_subexp (nullptr, exp, pos, EVAL_NORMAL); |
0d72a7c3 | 10363 | |
78134374 | 10364 | if (type->code () != TYPE_CODE_REF) |
0d72a7c3 JB |
10365 | { |
10366 | struct type *actual_type; | |
10367 | ||
10368 | actual_type = type_from_tag (ada_value_tag (arg1)); | |
10369 | if (actual_type == NULL) | |
10370 | /* If, for some reason, we were unable to determine | |
10371 | the actual type from the tag, then use the static | |
10372 | approximation that we just computed as a fallback. | |
10373 | This can happen if the debugging information is | |
10374 | incomplete, for instance. */ | |
10375 | actual_type = type; | |
10376 | return value_zero (actual_type, not_lval); | |
10377 | } | |
10378 | else | |
10379 | { | |
10380 | /* In the case of a ref, ada_coerce_ref takes care | |
10381 | of determining the actual type. But the evaluation | |
10382 | should return a ref as it should be valid to ask | |
10383 | for its address; so rebuild a ref after coerce. */ | |
10384 | arg1 = ada_coerce_ref (arg1); | |
a65cfae5 | 10385 | return value_ref (arg1, TYPE_CODE_REF); |
0d72a7c3 JB |
10386 | } |
10387 | } | |
0c1f74cf | 10388 | |
84754697 JB |
10389 | /* Records and unions for which GNAT encodings have been |
10390 | generated need to be statically fixed as well. | |
10391 | Otherwise, non-static fixing produces a type where | |
10392 | all dynamic properties are removed, which prevents "ptype" | |
10393 | from being able to completely describe the type. | |
10394 | For instance, a case statement in a variant record would be | |
10395 | replaced by the relevant components based on the actual | |
10396 | value of the discriminants. */ | |
78134374 | 10397 | if ((type->code () == TYPE_CODE_STRUCT |
84754697 | 10398 | && dynamic_template_type (type) != NULL) |
78134374 | 10399 | || (type->code () == TYPE_CODE_UNION |
84754697 JB |
10400 | && ada_find_parallel_type (type, "___XVU") != NULL)) |
10401 | { | |
10402 | *pos += 4; | |
10403 | return value_zero (to_static_fixed_type (type), not_lval); | |
10404 | } | |
dda83cd7 | 10405 | } |
da5c522f JB |
10406 | |
10407 | arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
10408 | return ada_to_fixed_value (arg1); | |
4c4b4cd2 PH |
10409 | |
10410 | case OP_FUNCALL: | |
10411 | (*pos) += 2; | |
10412 | ||
10413 | /* Allocate arg vector, including space for the function to be | |
dda83cd7 | 10414 | called in argvec[0] and a terminating NULL. */ |
4c4b4cd2 | 10415 | nargs = longest_to_int (exp->elts[pc + 1].longconst); |
8d749320 | 10416 | argvec = XALLOCAVEC (struct value *, nargs + 2); |
4c4b4cd2 PH |
10417 | |
10418 | if (exp->elts[*pos].opcode == OP_VAR_VALUE | |
dda83cd7 SM |
10419 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) |
10420 | error (_("Unexpected unresolved symbol, %s, during evaluation"), | |
10421 | exp->elts[pc + 5].symbol->print_name ()); | |
4c4b4cd2 | 10422 | else |
dda83cd7 SM |
10423 | { |
10424 | for (tem = 0; tem <= nargs; tem += 1) | |
fe1fe7ea SM |
10425 | argvec[tem] = evaluate_subexp (nullptr, exp, pos, noside); |
10426 | argvec[tem] = 0; | |
4c4b4cd2 | 10427 | |
dda83cd7 SM |
10428 | if (noside == EVAL_SKIP) |
10429 | goto nosideret; | |
10430 | } | |
4c4b4cd2 | 10431 | |
ad82864c JB |
10432 | if (ada_is_constrained_packed_array_type |
10433 | (desc_base_type (value_type (argvec[0])))) | |
dda83cd7 | 10434 | argvec[0] = ada_coerce_to_simple_array (argvec[0]); |
78134374 | 10435 | else if (value_type (argvec[0])->code () == TYPE_CODE_ARRAY |
dda83cd7 SM |
10436 | && TYPE_FIELD_BITSIZE (value_type (argvec[0]), 0) != 0) |
10437 | /* This is a packed array that has already been fixed, and | |
284614f0 JB |
10438 | therefore already coerced to a simple array. Nothing further |
10439 | to do. */ | |
dda83cd7 | 10440 | ; |
78134374 | 10441 | else if (value_type (argvec[0])->code () == TYPE_CODE_REF) |
e6c2c623 PMR |
10442 | { |
10443 | /* Make sure we dereference references so that all the code below | |
10444 | feels like it's really handling the referenced value. Wrapping | |
10445 | types (for alignment) may be there, so make sure we strip them as | |
10446 | well. */ | |
10447 | argvec[0] = ada_to_fixed_value (coerce_ref (argvec[0])); | |
10448 | } | |
78134374 | 10449 | else if (value_type (argvec[0])->code () == TYPE_CODE_ARRAY |
e6c2c623 PMR |
10450 | && VALUE_LVAL (argvec[0]) == lval_memory) |
10451 | argvec[0] = value_addr (argvec[0]); | |
4c4b4cd2 | 10452 | |
df407dfe | 10453 | type = ada_check_typedef (value_type (argvec[0])); |
720d1a40 JB |
10454 | |
10455 | /* Ada allows us to implicitly dereference arrays when subscripting | |
8f465ea7 JB |
10456 | them. So, if this is an array typedef (encoding use for array |
10457 | access types encoded as fat pointers), strip it now. */ | |
78134374 | 10458 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
10459 | type = ada_typedef_target_type (type); |
10460 | ||
78134374 | 10461 | if (type->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10462 | { |
10463 | switch (ada_check_typedef (TYPE_TARGET_TYPE (type))->code ()) | |
10464 | { | |
10465 | case TYPE_CODE_FUNC: | |
10466 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
10467 | break; | |
10468 | case TYPE_CODE_ARRAY: | |
10469 | break; | |
10470 | case TYPE_CODE_STRUCT: | |
10471 | if (noside != EVAL_AVOID_SIDE_EFFECTS) | |
10472 | argvec[0] = ada_value_ind (argvec[0]); | |
10473 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
10474 | break; | |
10475 | default: | |
10476 | error (_("cannot subscript or call something of type `%s'"), | |
10477 | ada_type_name (value_type (argvec[0]))); | |
10478 | break; | |
10479 | } | |
10480 | } | |
4c4b4cd2 | 10481 | |
78134374 | 10482 | switch (type->code ()) |
dda83cd7 SM |
10483 | { |
10484 | case TYPE_CODE_FUNC: | |
10485 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
c8ea1972 | 10486 | { |
7022349d PA |
10487 | if (TYPE_TARGET_TYPE (type) == NULL) |
10488 | error_call_unknown_return_type (NULL); | |
10489 | return allocate_value (TYPE_TARGET_TYPE (type)); | |
c8ea1972 | 10490 | } |
e71585ff PA |
10491 | return call_function_by_hand (argvec[0], NULL, |
10492 | gdb::make_array_view (argvec + 1, | |
10493 | nargs)); | |
c8ea1972 PH |
10494 | case TYPE_CODE_INTERNAL_FUNCTION: |
10495 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10496 | /* We don't know anything about what the internal | |
10497 | function might return, but we have to return | |
10498 | something. */ | |
10499 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
10500 | not_lval); | |
10501 | else | |
10502 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
10503 | argvec[0], nargs, argvec + 1); | |
10504 | ||
dda83cd7 SM |
10505 | case TYPE_CODE_STRUCT: |
10506 | { | |
10507 | int arity; | |
10508 | ||
10509 | arity = ada_array_arity (type); | |
10510 | type = ada_array_element_type (type, nargs); | |
10511 | if (type == NULL) | |
10512 | error (_("cannot subscript or call a record")); | |
10513 | if (arity != nargs) | |
10514 | error (_("wrong number of subscripts; expecting %d"), arity); | |
10515 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10516 | return value_zero (ada_aligned_type (type), lval_memory); | |
10517 | return | |
10518 | unwrap_value (ada_value_subscript | |
10519 | (argvec[0], nargs, argvec + 1)); | |
10520 | } | |
10521 | case TYPE_CODE_ARRAY: | |
10522 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10523 | { | |
10524 | type = ada_array_element_type (type, nargs); | |
10525 | if (type == NULL) | |
10526 | error (_("element type of array unknown")); | |
10527 | else | |
10528 | return value_zero (ada_aligned_type (type), lval_memory); | |
10529 | } | |
10530 | return | |
10531 | unwrap_value (ada_value_subscript | |
10532 | (ada_coerce_to_simple_array (argvec[0]), | |
10533 | nargs, argvec + 1)); | |
10534 | case TYPE_CODE_PTR: /* Pointer to array */ | |
10535 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10536 | { | |
deede10c | 10537 | type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1); |
dda83cd7 SM |
10538 | type = ada_array_element_type (type, nargs); |
10539 | if (type == NULL) | |
10540 | error (_("element type of array unknown")); | |
10541 | else | |
10542 | return value_zero (ada_aligned_type (type), lval_memory); | |
10543 | } | |
10544 | return | |
10545 | unwrap_value (ada_value_ptr_subscript (argvec[0], | |
deede10c | 10546 | nargs, argvec + 1)); |
4c4b4cd2 | 10547 | |
dda83cd7 SM |
10548 | default: |
10549 | error (_("Attempt to index or call something other than an " | |
e1d5a0d2 | 10550 | "array or function")); |
dda83cd7 | 10551 | } |
4c4b4cd2 PH |
10552 | |
10553 | case TERNOP_SLICE: | |
10554 | { | |
fe1fe7ea SM |
10555 | struct value *array = evaluate_subexp (nullptr, exp, pos, noside); |
10556 | struct value *low_bound_val | |
10557 | = evaluate_subexp (nullptr, exp, pos, noside); | |
10558 | struct value *high_bound_val | |
10559 | = evaluate_subexp (nullptr, exp, pos, noside); | |
10560 | LONGEST low_bound; | |
dda83cd7 SM |
10561 | LONGEST high_bound; |
10562 | ||
10563 | low_bound_val = coerce_ref (low_bound_val); | |
10564 | high_bound_val = coerce_ref (high_bound_val); | |
10565 | low_bound = value_as_long (low_bound_val); | |
10566 | high_bound = value_as_long (high_bound_val); | |
10567 | ||
10568 | if (noside == EVAL_SKIP) | |
10569 | goto nosideret; | |
10570 | ||
10571 | /* If this is a reference to an aligner type, then remove all | |
10572 | the aligners. */ | |
10573 | if (value_type (array)->code () == TYPE_CODE_REF | |
10574 | && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array)))) | |
10575 | TYPE_TARGET_TYPE (value_type (array)) = | |
10576 | ada_aligned_type (TYPE_TARGET_TYPE (value_type (array))); | |
10577 | ||
c9a28cbe | 10578 | if (ada_is_any_packed_array_type (value_type (array))) |
dda83cd7 SM |
10579 | error (_("cannot slice a packed array")); |
10580 | ||
10581 | /* If this is a reference to an array or an array lvalue, | |
10582 | convert to a pointer. */ | |
10583 | if (value_type (array)->code () == TYPE_CODE_REF | |
10584 | || (value_type (array)->code () == TYPE_CODE_ARRAY | |
10585 | && VALUE_LVAL (array) == lval_memory)) | |
10586 | array = value_addr (array); | |
10587 | ||
10588 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
10589 | && ada_is_array_descriptor_type (ada_check_typedef | |
10590 | (value_type (array)))) | |
10591 | return empty_array (ada_type_of_array (array, 0), low_bound, | |
bff8c71f | 10592 | high_bound); |
4c4b4cd2 | 10593 | |
dda83cd7 SM |
10594 | array = ada_coerce_to_simple_array_ptr (array); |
10595 | ||
10596 | /* If we have more than one level of pointer indirection, | |
10597 | dereference the value until we get only one level. */ | |
10598 | while (value_type (array)->code () == TYPE_CODE_PTR | |
10599 | && (TYPE_TARGET_TYPE (value_type (array))->code () | |
10600 | == TYPE_CODE_PTR)) | |
10601 | array = value_ind (array); | |
10602 | ||
10603 | /* Make sure we really do have an array type before going further, | |
10604 | to avoid a SEGV when trying to get the index type or the target | |
10605 | type later down the road if the debug info generated by | |
10606 | the compiler is incorrect or incomplete. */ | |
10607 | if (!ada_is_simple_array_type (value_type (array))) | |
10608 | error (_("cannot take slice of non-array")); | |
10609 | ||
10610 | if (ada_check_typedef (value_type (array))->code () | |
10611 | == TYPE_CODE_PTR) | |
10612 | { | |
10613 | struct type *type0 = ada_check_typedef (value_type (array)); | |
10614 | ||
10615 | if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS) | |
10616 | return empty_array (TYPE_TARGET_TYPE (type0), low_bound, high_bound); | |
10617 | else | |
10618 | { | |
10619 | struct type *arr_type0 = | |
10620 | to_fixed_array_type (TYPE_TARGET_TYPE (type0), NULL, 1); | |
10621 | ||
10622 | return ada_value_slice_from_ptr (array, arr_type0, | |
10623 | longest_to_int (low_bound), | |
10624 | longest_to_int (high_bound)); | |
10625 | } | |
10626 | } | |
10627 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10628 | return array; | |
10629 | else if (high_bound < low_bound) | |
10630 | return empty_array (value_type (array), low_bound, high_bound); | |
10631 | else | |
10632 | return ada_value_slice (array, longest_to_int (low_bound), | |
529cad9c | 10633 | longest_to_int (high_bound)); |
4c4b4cd2 | 10634 | } |
14f9c5c9 | 10635 | |
4c4b4cd2 PH |
10636 | case UNOP_IN_RANGE: |
10637 | (*pos) += 2; | |
fe1fe7ea | 10638 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
8008e265 | 10639 | type = check_typedef (exp->elts[pc + 1].type); |
14f9c5c9 | 10640 | |
14f9c5c9 | 10641 | if (noside == EVAL_SKIP) |
dda83cd7 | 10642 | goto nosideret; |
14f9c5c9 | 10643 | |
78134374 | 10644 | switch (type->code ()) |
dda83cd7 SM |
10645 | { |
10646 | default: | |
10647 | lim_warning (_("Membership test incompletely implemented; " | |
e1d5a0d2 | 10648 | "always returns true")); |
fbb06eb1 UW |
10649 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10650 | return value_from_longest (type, (LONGEST) 1); | |
4c4b4cd2 | 10651 | |
dda83cd7 | 10652 | case TYPE_CODE_RANGE: |
5537ddd0 SM |
10653 | arg2 = value_from_longest (type, |
10654 | type->bounds ()->low.const_val ()); | |
10655 | arg3 = value_from_longest (type, | |
10656 | type->bounds ()->high.const_val ()); | |
f44316fa UW |
10657 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10658 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 UW |
10659 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10660 | return | |
10661 | value_from_longest (type, | |
dda83cd7 SM |
10662 | (value_less (arg1, arg3) |
10663 | || value_equal (arg1, arg3)) | |
10664 | && (value_less (arg2, arg1) | |
10665 | || value_equal (arg2, arg1))); | |
10666 | } | |
4c4b4cd2 PH |
10667 | |
10668 | case BINOP_IN_BOUNDS: | |
14f9c5c9 | 10669 | (*pos) += 2; |
fe1fe7ea SM |
10670 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10671 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10672 | |
4c4b4cd2 | 10673 | if (noside == EVAL_SKIP) |
dda83cd7 | 10674 | goto nosideret; |
14f9c5c9 | 10675 | |
4c4b4cd2 | 10676 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
fbb06eb1 UW |
10677 | { |
10678 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10679 | return value_zero (type, not_lval); | |
10680 | } | |
14f9c5c9 | 10681 | |
4c4b4cd2 | 10682 | tem = longest_to_int (exp->elts[pc + 1].longconst); |
14f9c5c9 | 10683 | |
1eea4ebd UW |
10684 | type = ada_index_type (value_type (arg2), tem, "range"); |
10685 | if (!type) | |
10686 | type = value_type (arg1); | |
14f9c5c9 | 10687 | |
1eea4ebd UW |
10688 | arg3 = value_from_longest (type, ada_array_bound (arg2, tem, 1)); |
10689 | arg2 = value_from_longest (type, ada_array_bound (arg2, tem, 0)); | |
d2e4a39e | 10690 | |
f44316fa UW |
10691 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10692 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 | 10693 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
4c4b4cd2 | 10694 | return |
dda83cd7 SM |
10695 | value_from_longest (type, |
10696 | (value_less (arg1, arg3) | |
10697 | || value_equal (arg1, arg3)) | |
10698 | && (value_less (arg2, arg1) | |
10699 | || value_equal (arg2, arg1))); | |
4c4b4cd2 PH |
10700 | |
10701 | case TERNOP_IN_RANGE: | |
fe1fe7ea SM |
10702 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10703 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
10704 | arg3 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 PH |
10705 | |
10706 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10707 | goto nosideret; |
4c4b4cd2 | 10708 | |
f44316fa UW |
10709 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10710 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 | 10711 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
4c4b4cd2 | 10712 | return |
dda83cd7 SM |
10713 | value_from_longest (type, |
10714 | (value_less (arg1, arg3) | |
10715 | || value_equal (arg1, arg3)) | |
10716 | && (value_less (arg2, arg1) | |
10717 | || value_equal (arg2, arg1))); | |
4c4b4cd2 PH |
10718 | |
10719 | case OP_ATR_FIRST: | |
10720 | case OP_ATR_LAST: | |
10721 | case OP_ATR_LENGTH: | |
10722 | { | |
dda83cd7 | 10723 | struct type *type_arg; |
5b4ee69b | 10724 | |
dda83cd7 SM |
10725 | if (exp->elts[*pos].opcode == OP_TYPE) |
10726 | { | |
fe1fe7ea SM |
10727 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10728 | arg1 = NULL; | |
dda83cd7 SM |
10729 | type_arg = check_typedef (exp->elts[pc + 2].type); |
10730 | } | |
10731 | else | |
10732 | { | |
fe1fe7ea SM |
10733 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10734 | type_arg = NULL; | |
dda83cd7 | 10735 | } |
76a01679 | 10736 | |
dda83cd7 SM |
10737 | if (exp->elts[*pos].opcode != OP_LONG) |
10738 | error (_("Invalid operand to '%s"), ada_attribute_name (op)); | |
10739 | tem = longest_to_int (exp->elts[*pos + 2].longconst); | |
10740 | *pos += 4; | |
76a01679 | 10741 | |
dda83cd7 SM |
10742 | if (noside == EVAL_SKIP) |
10743 | goto nosideret; | |
680e1bee TT |
10744 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
10745 | { | |
10746 | if (type_arg == NULL) | |
10747 | type_arg = value_type (arg1); | |
76a01679 | 10748 | |
dda83cd7 | 10749 | if (ada_is_constrained_packed_array_type (type_arg)) |
680e1bee TT |
10750 | type_arg = decode_constrained_packed_array_type (type_arg); |
10751 | ||
10752 | if (!discrete_type_p (type_arg)) | |
10753 | { | |
10754 | switch (op) | |
10755 | { | |
10756 | default: /* Should never happen. */ | |
10757 | error (_("unexpected attribute encountered")); | |
10758 | case OP_ATR_FIRST: | |
10759 | case OP_ATR_LAST: | |
10760 | type_arg = ada_index_type (type_arg, tem, | |
10761 | ada_attribute_name (op)); | |
10762 | break; | |
10763 | case OP_ATR_LENGTH: | |
10764 | type_arg = builtin_type (exp->gdbarch)->builtin_int; | |
10765 | break; | |
10766 | } | |
10767 | } | |
10768 | ||
10769 | return value_zero (type_arg, not_lval); | |
10770 | } | |
dda83cd7 SM |
10771 | else if (type_arg == NULL) |
10772 | { | |
10773 | arg1 = ada_coerce_ref (arg1); | |
76a01679 | 10774 | |
dda83cd7 SM |
10775 | if (ada_is_constrained_packed_array_type (value_type (arg1))) |
10776 | arg1 = ada_coerce_to_simple_array (arg1); | |
76a01679 | 10777 | |
dda83cd7 | 10778 | if (op == OP_ATR_LENGTH) |
1eea4ebd | 10779 | type = builtin_type (exp->gdbarch)->builtin_int; |
aa4fb036 JB |
10780 | else |
10781 | { | |
10782 | type = ada_index_type (value_type (arg1), tem, | |
10783 | ada_attribute_name (op)); | |
10784 | if (type == NULL) | |
10785 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10786 | } | |
76a01679 | 10787 | |
dda83cd7 SM |
10788 | switch (op) |
10789 | { | |
10790 | default: /* Should never happen. */ | |
10791 | error (_("unexpected attribute encountered")); | |
10792 | case OP_ATR_FIRST: | |
10793 | return value_from_longest | |
1eea4ebd | 10794 | (type, ada_array_bound (arg1, tem, 0)); |
dda83cd7 SM |
10795 | case OP_ATR_LAST: |
10796 | return value_from_longest | |
1eea4ebd | 10797 | (type, ada_array_bound (arg1, tem, 1)); |
dda83cd7 SM |
10798 | case OP_ATR_LENGTH: |
10799 | return value_from_longest | |
1eea4ebd | 10800 | (type, ada_array_length (arg1, tem)); |
dda83cd7 SM |
10801 | } |
10802 | } | |
10803 | else if (discrete_type_p (type_arg)) | |
10804 | { | |
10805 | struct type *range_type; | |
10806 | const char *name = ada_type_name (type_arg); | |
10807 | ||
10808 | range_type = NULL; | |
10809 | if (name != NULL && type_arg->code () != TYPE_CODE_ENUM) | |
10810 | range_type = to_fixed_range_type (type_arg, NULL); | |
10811 | if (range_type == NULL) | |
10812 | range_type = type_arg; | |
10813 | switch (op) | |
10814 | { | |
10815 | default: | |
10816 | error (_("unexpected attribute encountered")); | |
10817 | case OP_ATR_FIRST: | |
690cc4eb | 10818 | return value_from_longest |
43bbcdc2 | 10819 | (range_type, ada_discrete_type_low_bound (range_type)); |
dda83cd7 SM |
10820 | case OP_ATR_LAST: |
10821 | return value_from_longest | |
43bbcdc2 | 10822 | (range_type, ada_discrete_type_high_bound (range_type)); |
dda83cd7 SM |
10823 | case OP_ATR_LENGTH: |
10824 | error (_("the 'length attribute applies only to array types")); | |
10825 | } | |
10826 | } | |
10827 | else if (type_arg->code () == TYPE_CODE_FLT) | |
10828 | error (_("unimplemented type attribute")); | |
10829 | else | |
10830 | { | |
10831 | LONGEST low, high; | |
10832 | ||
10833 | if (ada_is_constrained_packed_array_type (type_arg)) | |
10834 | type_arg = decode_constrained_packed_array_type (type_arg); | |
76a01679 | 10835 | |
aa4fb036 | 10836 | if (op == OP_ATR_LENGTH) |
1eea4ebd | 10837 | type = builtin_type (exp->gdbarch)->builtin_int; |
aa4fb036 JB |
10838 | else |
10839 | { | |
10840 | type = ada_index_type (type_arg, tem, ada_attribute_name (op)); | |
10841 | if (type == NULL) | |
10842 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10843 | } | |
1eea4ebd | 10844 | |
dda83cd7 SM |
10845 | switch (op) |
10846 | { | |
10847 | default: | |
10848 | error (_("unexpected attribute encountered")); | |
10849 | case OP_ATR_FIRST: | |
10850 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10851 | return value_from_longest (type, low); | |
10852 | case OP_ATR_LAST: | |
10853 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10854 | return value_from_longest (type, high); | |
10855 | case OP_ATR_LENGTH: | |
10856 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10857 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10858 | return value_from_longest (type, high - low + 1); | |
10859 | } | |
10860 | } | |
14f9c5c9 AS |
10861 | } |
10862 | ||
4c4b4cd2 | 10863 | case OP_ATR_TAG: |
fe1fe7ea | 10864 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10865 | if (noside == EVAL_SKIP) |
dda83cd7 | 10866 | goto nosideret; |
4c4b4cd2 PH |
10867 | |
10868 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
dda83cd7 | 10869 | return value_zero (ada_tag_type (arg1), not_lval); |
4c4b4cd2 PH |
10870 | |
10871 | return ada_value_tag (arg1); | |
10872 | ||
10873 | case OP_ATR_MIN: | |
10874 | case OP_ATR_MAX: | |
fe1fe7ea SM |
10875 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10876 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
10877 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10878 | if (noside == EVAL_SKIP) |
dda83cd7 | 10879 | goto nosideret; |
d2e4a39e | 10880 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10881 | return value_zero (value_type (arg1), not_lval); |
14f9c5c9 | 10882 | else |
f44316fa UW |
10883 | { |
10884 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10885 | return value_binop (arg1, arg2, | |
10886 | op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX); | |
10887 | } | |
14f9c5c9 | 10888 | |
4c4b4cd2 PH |
10889 | case OP_ATR_MODULUS: |
10890 | { | |
dda83cd7 | 10891 | struct type *type_arg = check_typedef (exp->elts[pc + 2].type); |
4c4b4cd2 | 10892 | |
fe1fe7ea SM |
10893 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10894 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10895 | goto nosideret; |
4c4b4cd2 | 10896 | |
dda83cd7 SM |
10897 | if (!ada_is_modular_type (type_arg)) |
10898 | error (_("'modulus must be applied to modular type")); | |
4c4b4cd2 | 10899 | |
dda83cd7 SM |
10900 | return value_from_longest (TYPE_TARGET_TYPE (type_arg), |
10901 | ada_modulus (type_arg)); | |
4c4b4cd2 PH |
10902 | } |
10903 | ||
10904 | ||
10905 | case OP_ATR_POS: | |
fe1fe7ea SM |
10906 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10907 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10908 | if (noside == EVAL_SKIP) |
dda83cd7 | 10909 | goto nosideret; |
3cb382c9 UW |
10910 | type = builtin_type (exp->gdbarch)->builtin_int; |
10911 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10912 | return value_zero (type, not_lval); | |
14f9c5c9 | 10913 | else |
3cb382c9 | 10914 | return value_pos_atr (type, arg1); |
14f9c5c9 | 10915 | |
4c4b4cd2 | 10916 | case OP_ATR_SIZE: |
fe1fe7ea | 10917 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
8c1c099f JB |
10918 | type = value_type (arg1); |
10919 | ||
10920 | /* If the argument is a reference, then dereference its type, since | |
dda83cd7 SM |
10921 | the user is really asking for the size of the actual object, |
10922 | not the size of the pointer. */ | |
78134374 | 10923 | if (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10924 | type = TYPE_TARGET_TYPE (type); |
8c1c099f | 10925 | |
4c4b4cd2 | 10926 | if (noside == EVAL_SKIP) |
dda83cd7 | 10927 | goto nosideret; |
4c4b4cd2 | 10928 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10929 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval); |
4c4b4cd2 | 10930 | else |
dda83cd7 SM |
10931 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, |
10932 | TARGET_CHAR_BIT * TYPE_LENGTH (type)); | |
4c4b4cd2 PH |
10933 | |
10934 | case OP_ATR_VAL: | |
fe1fe7ea SM |
10935 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10936 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 | 10937 | type = exp->elts[pc + 2].type; |
14f9c5c9 | 10938 | if (noside == EVAL_SKIP) |
dda83cd7 | 10939 | goto nosideret; |
4c4b4cd2 | 10940 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10941 | return value_zero (type, not_lval); |
4c4b4cd2 | 10942 | else |
dda83cd7 | 10943 | return value_val_atr (type, arg1); |
4c4b4cd2 PH |
10944 | |
10945 | case BINOP_EXP: | |
fe1fe7ea SM |
10946 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10947 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 | 10948 | if (noside == EVAL_SKIP) |
dda83cd7 | 10949 | goto nosideret; |
4c4b4cd2 | 10950 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10951 | return value_zero (value_type (arg1), not_lval); |
4c4b4cd2 | 10952 | else |
f44316fa UW |
10953 | { |
10954 | /* For integer exponentiation operations, | |
10955 | only promote the first argument. */ | |
10956 | if (is_integral_type (value_type (arg2))) | |
10957 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
10958 | else | |
10959 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10960 | ||
10961 | return value_binop (arg1, arg2, op); | |
10962 | } | |
4c4b4cd2 PH |
10963 | |
10964 | case UNOP_PLUS: | |
fe1fe7ea | 10965 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10966 | if (noside == EVAL_SKIP) |
dda83cd7 | 10967 | goto nosideret; |
4c4b4cd2 | 10968 | else |
dda83cd7 | 10969 | return arg1; |
4c4b4cd2 PH |
10970 | |
10971 | case UNOP_ABS: | |
fe1fe7ea | 10972 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10973 | if (noside == EVAL_SKIP) |
dda83cd7 | 10974 | goto nosideret; |
f44316fa | 10975 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); |
df407dfe | 10976 | if (value_less (arg1, value_zero (value_type (arg1), not_lval))) |
dda83cd7 | 10977 | return value_neg (arg1); |
14f9c5c9 | 10978 | else |
dda83cd7 | 10979 | return arg1; |
14f9c5c9 AS |
10980 | |
10981 | case UNOP_IND: | |
5ec18f2b | 10982 | preeval_pos = *pos; |
fe1fe7ea | 10983 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
14f9c5c9 | 10984 | if (noside == EVAL_SKIP) |
dda83cd7 | 10985 | goto nosideret; |
df407dfe | 10986 | type = ada_check_typedef (value_type (arg1)); |
14f9c5c9 | 10987 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
10988 | { |
10989 | if (ada_is_array_descriptor_type (type)) | |
10990 | /* GDB allows dereferencing GNAT array descriptors. */ | |
10991 | { | |
10992 | struct type *arrType = ada_type_of_array (arg1, 0); | |
10993 | ||
10994 | if (arrType == NULL) | |
10995 | error (_("Attempt to dereference null array pointer.")); | |
10996 | return value_at_lazy (arrType, 0); | |
10997 | } | |
10998 | else if (type->code () == TYPE_CODE_PTR | |
10999 | || type->code () == TYPE_CODE_REF | |
11000 | /* In C you can dereference an array to get the 1st elt. */ | |
11001 | || type->code () == TYPE_CODE_ARRAY) | |
11002 | { | |
11003 | /* As mentioned in the OP_VAR_VALUE case, tagged types can | |
11004 | only be determined by inspecting the object's tag. | |
11005 | This means that we need to evaluate completely the | |
11006 | expression in order to get its type. */ | |
5ec18f2b | 11007 | |
78134374 SM |
11008 | if ((type->code () == TYPE_CODE_REF |
11009 | || type->code () == TYPE_CODE_PTR) | |
5ec18f2b JG |
11010 | && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0)) |
11011 | { | |
fe1fe7ea SM |
11012 | arg1 |
11013 | = evaluate_subexp (nullptr, exp, &preeval_pos, EVAL_NORMAL); | |
5ec18f2b JG |
11014 | type = value_type (ada_value_ind (arg1)); |
11015 | } | |
11016 | else | |
11017 | { | |
11018 | type = to_static_fixed_type | |
11019 | (ada_aligned_type | |
11020 | (ada_check_typedef (TYPE_TARGET_TYPE (type)))); | |
11021 | } | |
c1b5a1a6 | 11022 | ada_ensure_varsize_limit (type); |
dda83cd7 SM |
11023 | return value_zero (type, lval_memory); |
11024 | } | |
11025 | else if (type->code () == TYPE_CODE_INT) | |
6b0d7253 JB |
11026 | { |
11027 | /* GDB allows dereferencing an int. */ | |
11028 | if (expect_type == NULL) | |
11029 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
11030 | lval_memory); | |
11031 | else | |
11032 | { | |
11033 | expect_type = | |
11034 | to_static_fixed_type (ada_aligned_type (expect_type)); | |
11035 | return value_zero (expect_type, lval_memory); | |
11036 | } | |
11037 | } | |
dda83cd7 SM |
11038 | else |
11039 | error (_("Attempt to take contents of a non-pointer value.")); | |
11040 | } | |
0963b4bd | 11041 | arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */ |
df407dfe | 11042 | type = ada_check_typedef (value_type (arg1)); |
d2e4a39e | 11043 | |
78134374 | 11044 | if (type->code () == TYPE_CODE_INT) |
dda83cd7 SM |
11045 | /* GDB allows dereferencing an int. If we were given |
11046 | the expect_type, then use that as the target type. | |
11047 | Otherwise, assume that the target type is an int. */ | |
11048 | { | |
11049 | if (expect_type != NULL) | |
96967637 JB |
11050 | return ada_value_ind (value_cast (lookup_pointer_type (expect_type), |
11051 | arg1)); | |
11052 | else | |
11053 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, | |
11054 | (CORE_ADDR) value_as_address (arg1)); | |
dda83cd7 | 11055 | } |
6b0d7253 | 11056 | |
4c4b4cd2 | 11057 | if (ada_is_array_descriptor_type (type)) |
dda83cd7 SM |
11058 | /* GDB allows dereferencing GNAT array descriptors. */ |
11059 | return ada_coerce_to_simple_array (arg1); | |
14f9c5c9 | 11060 | else |
dda83cd7 | 11061 | return ada_value_ind (arg1); |
14f9c5c9 AS |
11062 | |
11063 | case STRUCTOP_STRUCT: | |
11064 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
11065 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
5ec18f2b | 11066 | preeval_pos = *pos; |
fe1fe7ea | 11067 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
14f9c5c9 | 11068 | if (noside == EVAL_SKIP) |
dda83cd7 | 11069 | goto nosideret; |
14f9c5c9 | 11070 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
11071 | { |
11072 | struct type *type1 = value_type (arg1); | |
5b4ee69b | 11073 | |
dda83cd7 SM |
11074 | if (ada_is_tagged_type (type1, 1)) |
11075 | { | |
11076 | type = ada_lookup_struct_elt_type (type1, | |
11077 | &exp->elts[pc + 2].string, | |
11078 | 1, 1); | |
5ec18f2b JG |
11079 | |
11080 | /* If the field is not found, check if it exists in the | |
11081 | extension of this object's type. This means that we | |
11082 | need to evaluate completely the expression. */ | |
11083 | ||
dda83cd7 | 11084 | if (type == NULL) |
5ec18f2b | 11085 | { |
fe1fe7ea SM |
11086 | arg1 |
11087 | = evaluate_subexp (nullptr, exp, &preeval_pos, EVAL_NORMAL); | |
5ec18f2b JG |
11088 | arg1 = ada_value_struct_elt (arg1, |
11089 | &exp->elts[pc + 2].string, | |
11090 | 0); | |
11091 | arg1 = unwrap_value (arg1); | |
11092 | type = value_type (ada_to_fixed_value (arg1)); | |
11093 | } | |
dda83cd7 SM |
11094 | } |
11095 | else | |
11096 | type = | |
11097 | ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1, | |
11098 | 0); | |
11099 | ||
11100 | return value_zero (ada_aligned_type (type), lval_memory); | |
11101 | } | |
14f9c5c9 | 11102 | else |
a579cd9a MW |
11103 | { |
11104 | arg1 = ada_value_struct_elt (arg1, &exp->elts[pc + 2].string, 0); | |
11105 | arg1 = unwrap_value (arg1); | |
11106 | return ada_to_fixed_value (arg1); | |
11107 | } | |
284614f0 | 11108 | |
14f9c5c9 | 11109 | case OP_TYPE: |
4c4b4cd2 | 11110 | /* The value is not supposed to be used. This is here to make it |
dda83cd7 | 11111 | easier to accommodate expressions that contain types. */ |
14f9c5c9 AS |
11112 | (*pos) += 2; |
11113 | if (noside == EVAL_SKIP) | |
dda83cd7 | 11114 | goto nosideret; |
14f9c5c9 | 11115 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 11116 | return allocate_value (exp->elts[pc + 1].type); |
14f9c5c9 | 11117 | else |
dda83cd7 | 11118 | error (_("Attempt to use a type name as an expression")); |
52ce6436 PH |
11119 | |
11120 | case OP_AGGREGATE: | |
11121 | case OP_CHOICES: | |
11122 | case OP_OTHERS: | |
11123 | case OP_DISCRETE_RANGE: | |
11124 | case OP_POSITIONAL: | |
11125 | case OP_NAME: | |
11126 | if (noside == EVAL_NORMAL) | |
11127 | switch (op) | |
11128 | { | |
11129 | case OP_NAME: | |
11130 | error (_("Undefined name, ambiguous name, or renaming used in " | |
e1d5a0d2 | 11131 | "component association: %s."), &exp->elts[pc+2].string); |
52ce6436 PH |
11132 | case OP_AGGREGATE: |
11133 | error (_("Aggregates only allowed on the right of an assignment")); | |
11134 | default: | |
0963b4bd MS |
11135 | internal_error (__FILE__, __LINE__, |
11136 | _("aggregate apparently mangled")); | |
52ce6436 PH |
11137 | } |
11138 | ||
11139 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
11140 | *pos += oplen - 1; | |
11141 | for (tem = 0; tem < nargs; tem += 1) | |
11142 | ada_evaluate_subexp (NULL, exp, pos, noside); | |
11143 | goto nosideret; | |
14f9c5c9 AS |
11144 | } |
11145 | ||
11146 | nosideret: | |
ced9779b | 11147 | return eval_skip_value (exp); |
14f9c5c9 | 11148 | } |
14f9c5c9 | 11149 | \f |
d2e4a39e | 11150 | |
dda83cd7 | 11151 | /* Fixed point */ |
14f9c5c9 AS |
11152 | |
11153 | /* If TYPE encodes an Ada fixed-point type, return the suffix of the | |
11154 | type name that encodes the 'small and 'delta information. | |
4c4b4cd2 | 11155 | Otherwise, return NULL. */ |
14f9c5c9 | 11156 | |
d2e4a39e | 11157 | static const char * |
60bd1d53 | 11158 | gnat_encoded_fixed_point_type_info (struct type *type) |
14f9c5c9 | 11159 | { |
d2e4a39e | 11160 | const char *name = ada_type_name (type); |
78134374 | 11161 | enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : type->code (); |
14f9c5c9 | 11162 | |
d2e4a39e AS |
11163 | if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL) |
11164 | { | |
14f9c5c9 | 11165 | const char *tail = strstr (name, "___XF_"); |
5b4ee69b | 11166 | |
14f9c5c9 | 11167 | if (tail == NULL) |
dda83cd7 | 11168 | return NULL; |
d2e4a39e | 11169 | else |
dda83cd7 | 11170 | return tail + 5; |
14f9c5c9 AS |
11171 | } |
11172 | else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type) | |
60bd1d53 | 11173 | return gnat_encoded_fixed_point_type_info (TYPE_TARGET_TYPE (type)); |
14f9c5c9 AS |
11174 | else |
11175 | return NULL; | |
11176 | } | |
11177 | ||
4c4b4cd2 | 11178 | /* Returns non-zero iff TYPE represents an Ada fixed-point type. */ |
14f9c5c9 AS |
11179 | |
11180 | int | |
b2188a06 | 11181 | ada_is_gnat_encoded_fixed_point_type (struct type *type) |
14f9c5c9 | 11182 | { |
60bd1d53 | 11183 | return gnat_encoded_fixed_point_type_info (type) != NULL; |
14f9c5c9 AS |
11184 | } |
11185 | ||
4c4b4cd2 PH |
11186 | /* Return non-zero iff TYPE represents a System.Address type. */ |
11187 | ||
11188 | int | |
11189 | ada_is_system_address_type (struct type *type) | |
11190 | { | |
7d93a1e0 | 11191 | return (type->name () && strcmp (type->name (), "system__address") == 0); |
4c4b4cd2 PH |
11192 | } |
11193 | ||
14f9c5c9 | 11194 | /* Assuming that TYPE is the representation of an Ada fixed-point |
50eff16b UW |
11195 | type, return the target floating-point type to be used to represent |
11196 | of this type during internal computation. */ | |
11197 | ||
11198 | static struct type * | |
11199 | ada_scaling_type (struct type *type) | |
11200 | { | |
11201 | return builtin_type (get_type_arch (type))->builtin_long_double; | |
11202 | } | |
11203 | ||
11204 | /* Assuming that TYPE is the representation of an Ada fixed-point | |
11205 | type, return its delta, or NULL if the type is malformed and the | |
4c4b4cd2 | 11206 | delta cannot be determined. */ |
14f9c5c9 | 11207 | |
50eff16b | 11208 | struct value * |
b2188a06 | 11209 | gnat_encoded_fixed_point_delta (struct type *type) |
14f9c5c9 | 11210 | { |
60bd1d53 | 11211 | const char *encoding = gnat_encoded_fixed_point_type_info (type); |
50eff16b UW |
11212 | struct type *scale_type = ada_scaling_type (type); |
11213 | ||
11214 | long long num, den; | |
11215 | ||
11216 | if (sscanf (encoding, "_%lld_%lld", &num, &den) < 2) | |
11217 | return nullptr; | |
d2e4a39e | 11218 | else |
50eff16b UW |
11219 | return value_binop (value_from_longest (scale_type, num), |
11220 | value_from_longest (scale_type, den), BINOP_DIV); | |
14f9c5c9 AS |
11221 | } |
11222 | ||
b2188a06 JB |
11223 | /* Assuming that ada_is_gnat_encoded_fixed_point_type (TYPE), return |
11224 | the scaling factor ('SMALL value) associated with the type. */ | |
14f9c5c9 | 11225 | |
50eff16b | 11226 | struct value * |
75f24e86 | 11227 | gnat_encoded_fixed_point_scaling_factor (struct type *type) |
14f9c5c9 | 11228 | { |
60bd1d53 | 11229 | const char *encoding = gnat_encoded_fixed_point_type_info (type); |
50eff16b UW |
11230 | struct type *scale_type = ada_scaling_type (type); |
11231 | ||
11232 | long long num0, den0, num1, den1; | |
14f9c5c9 | 11233 | int n; |
d2e4a39e | 11234 | |
50eff16b | 11235 | n = sscanf (encoding, "_%lld_%lld_%lld_%lld", |
facc390f | 11236 | &num0, &den0, &num1, &den1); |
14f9c5c9 AS |
11237 | |
11238 | if (n < 2) | |
50eff16b | 11239 | return value_from_longest (scale_type, 1); |
14f9c5c9 | 11240 | else if (n == 4) |
50eff16b UW |
11241 | return value_binop (value_from_longest (scale_type, num1), |
11242 | value_from_longest (scale_type, den1), BINOP_DIV); | |
d2e4a39e | 11243 | else |
50eff16b UW |
11244 | return value_binop (value_from_longest (scale_type, num0), |
11245 | value_from_longest (scale_type, den0), BINOP_DIV); | |
14f9c5c9 AS |
11246 | } |
11247 | ||
14f9c5c9 | 11248 | \f |
d2e4a39e | 11249 | |
dda83cd7 | 11250 | /* Range types */ |
14f9c5c9 AS |
11251 | |
11252 | /* Scan STR beginning at position K for a discriminant name, and | |
11253 | return the value of that discriminant field of DVAL in *PX. If | |
11254 | PNEW_K is not null, put the position of the character beyond the | |
11255 | name scanned in *PNEW_K. Return 1 if successful; return 0 and do | |
4c4b4cd2 | 11256 | not alter *PX and *PNEW_K if unsuccessful. */ |
14f9c5c9 AS |
11257 | |
11258 | static int | |
108d56a4 | 11259 | scan_discrim_bound (const char *str, int k, struct value *dval, LONGEST * px, |
dda83cd7 | 11260 | int *pnew_k) |
14f9c5c9 AS |
11261 | { |
11262 | static char *bound_buffer = NULL; | |
11263 | static size_t bound_buffer_len = 0; | |
5da1a4d3 | 11264 | const char *pstart, *pend, *bound; |
d2e4a39e | 11265 | struct value *bound_val; |
14f9c5c9 AS |
11266 | |
11267 | if (dval == NULL || str == NULL || str[k] == '\0') | |
11268 | return 0; | |
11269 | ||
5da1a4d3 SM |
11270 | pstart = str + k; |
11271 | pend = strstr (pstart, "__"); | |
14f9c5c9 AS |
11272 | if (pend == NULL) |
11273 | { | |
5da1a4d3 | 11274 | bound = pstart; |
14f9c5c9 AS |
11275 | k += strlen (bound); |
11276 | } | |
d2e4a39e | 11277 | else |
14f9c5c9 | 11278 | { |
5da1a4d3 SM |
11279 | int len = pend - pstart; |
11280 | ||
11281 | /* Strip __ and beyond. */ | |
11282 | GROW_VECT (bound_buffer, bound_buffer_len, len + 1); | |
11283 | strncpy (bound_buffer, pstart, len); | |
11284 | bound_buffer[len] = '\0'; | |
11285 | ||
14f9c5c9 | 11286 | bound = bound_buffer; |
d2e4a39e | 11287 | k = pend - str; |
14f9c5c9 | 11288 | } |
d2e4a39e | 11289 | |
df407dfe | 11290 | bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval)); |
14f9c5c9 AS |
11291 | if (bound_val == NULL) |
11292 | return 0; | |
11293 | ||
11294 | *px = value_as_long (bound_val); | |
11295 | if (pnew_k != NULL) | |
11296 | *pnew_k = k; | |
11297 | return 1; | |
11298 | } | |
11299 | ||
25a1127b TT |
11300 | /* Value of variable named NAME. Only exact matches are considered. |
11301 | If no such variable found, then if ERR_MSG is null, returns 0, and | |
4c4b4cd2 PH |
11302 | otherwise causes an error with message ERR_MSG. */ |
11303 | ||
d2e4a39e | 11304 | static struct value * |
edb0c9cb | 11305 | get_var_value (const char *name, const char *err_msg) |
14f9c5c9 | 11306 | { |
25a1127b TT |
11307 | std::string quoted_name = add_angle_brackets (name); |
11308 | ||
11309 | lookup_name_info lookup_name (quoted_name, symbol_name_match_type::FULL); | |
14f9c5c9 | 11310 | |
54d343a2 | 11311 | std::vector<struct block_symbol> syms; |
b5ec771e PA |
11312 | int nsyms = ada_lookup_symbol_list_worker (lookup_name, |
11313 | get_selected_block (0), | |
11314 | VAR_DOMAIN, &syms, 1); | |
14f9c5c9 AS |
11315 | |
11316 | if (nsyms != 1) | |
11317 | { | |
11318 | if (err_msg == NULL) | |
dda83cd7 | 11319 | return 0; |
14f9c5c9 | 11320 | else |
dda83cd7 | 11321 | error (("%s"), err_msg); |
14f9c5c9 AS |
11322 | } |
11323 | ||
54d343a2 | 11324 | return value_of_variable (syms[0].symbol, syms[0].block); |
14f9c5c9 | 11325 | } |
d2e4a39e | 11326 | |
edb0c9cb PA |
11327 | /* Value of integer variable named NAME in the current environment. |
11328 | If no such variable is found, returns false. Otherwise, sets VALUE | |
11329 | to the variable's value and returns true. */ | |
4c4b4cd2 | 11330 | |
edb0c9cb PA |
11331 | bool |
11332 | get_int_var_value (const char *name, LONGEST &value) | |
14f9c5c9 | 11333 | { |
4c4b4cd2 | 11334 | struct value *var_val = get_var_value (name, 0); |
d2e4a39e | 11335 | |
14f9c5c9 | 11336 | if (var_val == 0) |
edb0c9cb PA |
11337 | return false; |
11338 | ||
11339 | value = value_as_long (var_val); | |
11340 | return true; | |
14f9c5c9 | 11341 | } |
d2e4a39e | 11342 | |
14f9c5c9 AS |
11343 | |
11344 | /* Return a range type whose base type is that of the range type named | |
11345 | NAME in the current environment, and whose bounds are calculated | |
4c4b4cd2 | 11346 | from NAME according to the GNAT range encoding conventions. |
1ce677a4 UW |
11347 | Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the |
11348 | corresponding range type from debug information; fall back to using it | |
11349 | if symbol lookup fails. If a new type must be created, allocate it | |
11350 | like ORIG_TYPE was. The bounds information, in general, is encoded | |
11351 | in NAME, the base type given in the named range type. */ | |
14f9c5c9 | 11352 | |
d2e4a39e | 11353 | static struct type * |
28c85d6c | 11354 | to_fixed_range_type (struct type *raw_type, struct value *dval) |
14f9c5c9 | 11355 | { |
0d5cff50 | 11356 | const char *name; |
14f9c5c9 | 11357 | struct type *base_type; |
108d56a4 | 11358 | const char *subtype_info; |
14f9c5c9 | 11359 | |
28c85d6c | 11360 | gdb_assert (raw_type != NULL); |
7d93a1e0 | 11361 | gdb_assert (raw_type->name () != NULL); |
dddfab26 | 11362 | |
78134374 | 11363 | if (raw_type->code () == TYPE_CODE_RANGE) |
14f9c5c9 AS |
11364 | base_type = TYPE_TARGET_TYPE (raw_type); |
11365 | else | |
11366 | base_type = raw_type; | |
11367 | ||
7d93a1e0 | 11368 | name = raw_type->name (); |
14f9c5c9 AS |
11369 | subtype_info = strstr (name, "___XD"); |
11370 | if (subtype_info == NULL) | |
690cc4eb | 11371 | { |
43bbcdc2 PH |
11372 | LONGEST L = ada_discrete_type_low_bound (raw_type); |
11373 | LONGEST U = ada_discrete_type_high_bound (raw_type); | |
5b4ee69b | 11374 | |
690cc4eb PH |
11375 | if (L < INT_MIN || U > INT_MAX) |
11376 | return raw_type; | |
11377 | else | |
0c9c3474 SA |
11378 | return create_static_range_type (alloc_type_copy (raw_type), raw_type, |
11379 | L, U); | |
690cc4eb | 11380 | } |
14f9c5c9 AS |
11381 | else |
11382 | { | |
11383 | static char *name_buf = NULL; | |
11384 | static size_t name_len = 0; | |
11385 | int prefix_len = subtype_info - name; | |
11386 | LONGEST L, U; | |
11387 | struct type *type; | |
108d56a4 | 11388 | const char *bounds_str; |
14f9c5c9 AS |
11389 | int n; |
11390 | ||
11391 | GROW_VECT (name_buf, name_len, prefix_len + 5); | |
11392 | strncpy (name_buf, name, prefix_len); | |
11393 | name_buf[prefix_len] = '\0'; | |
11394 | ||
11395 | subtype_info += 5; | |
11396 | bounds_str = strchr (subtype_info, '_'); | |
11397 | n = 1; | |
11398 | ||
d2e4a39e | 11399 | if (*subtype_info == 'L') |
dda83cd7 SM |
11400 | { |
11401 | if (!ada_scan_number (bounds_str, n, &L, &n) | |
11402 | && !scan_discrim_bound (bounds_str, n, dval, &L, &n)) | |
11403 | return raw_type; | |
11404 | if (bounds_str[n] == '_') | |
11405 | n += 2; | |
11406 | else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */ | |
11407 | n += 1; | |
11408 | subtype_info += 1; | |
11409 | } | |
d2e4a39e | 11410 | else |
dda83cd7 SM |
11411 | { |
11412 | strcpy (name_buf + prefix_len, "___L"); | |
11413 | if (!get_int_var_value (name_buf, L)) | |
11414 | { | |
11415 | lim_warning (_("Unknown lower bound, using 1.")); | |
11416 | L = 1; | |
11417 | } | |
11418 | } | |
14f9c5c9 | 11419 | |
d2e4a39e | 11420 | if (*subtype_info == 'U') |
dda83cd7 SM |
11421 | { |
11422 | if (!ada_scan_number (bounds_str, n, &U, &n) | |
11423 | && !scan_discrim_bound (bounds_str, n, dval, &U, &n)) | |
11424 | return raw_type; | |
11425 | } | |
d2e4a39e | 11426 | else |
dda83cd7 SM |
11427 | { |
11428 | strcpy (name_buf + prefix_len, "___U"); | |
11429 | if (!get_int_var_value (name_buf, U)) | |
11430 | { | |
11431 | lim_warning (_("Unknown upper bound, using %ld."), (long) L); | |
11432 | U = L; | |
11433 | } | |
11434 | } | |
14f9c5c9 | 11435 | |
0c9c3474 SA |
11436 | type = create_static_range_type (alloc_type_copy (raw_type), |
11437 | base_type, L, U); | |
f5a91472 | 11438 | /* create_static_range_type alters the resulting type's length |
dda83cd7 SM |
11439 | to match the size of the base_type, which is not what we want. |
11440 | Set it back to the original range type's length. */ | |
f5a91472 | 11441 | TYPE_LENGTH (type) = TYPE_LENGTH (raw_type); |
d0e39ea2 | 11442 | type->set_name (name); |
14f9c5c9 AS |
11443 | return type; |
11444 | } | |
11445 | } | |
11446 | ||
4c4b4cd2 PH |
11447 | /* True iff NAME is the name of a range type. */ |
11448 | ||
14f9c5c9 | 11449 | int |
d2e4a39e | 11450 | ada_is_range_type_name (const char *name) |
14f9c5c9 AS |
11451 | { |
11452 | return (name != NULL && strstr (name, "___XD")); | |
d2e4a39e | 11453 | } |
14f9c5c9 | 11454 | \f |
d2e4a39e | 11455 | |
dda83cd7 | 11456 | /* Modular types */ |
4c4b4cd2 PH |
11457 | |
11458 | /* True iff TYPE is an Ada modular type. */ | |
14f9c5c9 | 11459 | |
14f9c5c9 | 11460 | int |
d2e4a39e | 11461 | ada_is_modular_type (struct type *type) |
14f9c5c9 | 11462 | { |
18af8284 | 11463 | struct type *subranged_type = get_base_type (type); |
14f9c5c9 | 11464 | |
78134374 | 11465 | return (subranged_type != NULL && type->code () == TYPE_CODE_RANGE |
dda83cd7 SM |
11466 | && subranged_type->code () == TYPE_CODE_INT |
11467 | && subranged_type->is_unsigned ()); | |
14f9c5c9 AS |
11468 | } |
11469 | ||
4c4b4cd2 PH |
11470 | /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */ |
11471 | ||
61ee279c | 11472 | ULONGEST |
0056e4d5 | 11473 | ada_modulus (struct type *type) |
14f9c5c9 | 11474 | { |
5e500d33 SM |
11475 | const dynamic_prop &high = type->bounds ()->high; |
11476 | ||
11477 | if (high.kind () == PROP_CONST) | |
11478 | return (ULONGEST) high.const_val () + 1; | |
11479 | ||
11480 | /* If TYPE is unresolved, the high bound might be a location list. Return | |
11481 | 0, for lack of a better value to return. */ | |
11482 | return 0; | |
14f9c5c9 | 11483 | } |
d2e4a39e | 11484 | \f |
f7f9143b JB |
11485 | |
11486 | /* Ada exception catchpoint support: | |
11487 | --------------------------------- | |
11488 | ||
11489 | We support 3 kinds of exception catchpoints: | |
11490 | . catchpoints on Ada exceptions | |
11491 | . catchpoints on unhandled Ada exceptions | |
11492 | . catchpoints on failed assertions | |
11493 | ||
11494 | Exceptions raised during failed assertions, or unhandled exceptions | |
11495 | could perfectly be caught with the general catchpoint on Ada exceptions. | |
11496 | However, we can easily differentiate these two special cases, and having | |
11497 | the option to distinguish these two cases from the rest can be useful | |
11498 | to zero-in on certain situations. | |
11499 | ||
11500 | Exception catchpoints are a specialized form of breakpoint, | |
11501 | since they rely on inserting breakpoints inside known routines | |
11502 | of the GNAT runtime. The implementation therefore uses a standard | |
11503 | breakpoint structure of the BP_BREAKPOINT type, but with its own set | |
11504 | of breakpoint_ops. | |
11505 | ||
0259addd JB |
11506 | Support in the runtime for exception catchpoints have been changed |
11507 | a few times already, and these changes affect the implementation | |
11508 | of these catchpoints. In order to be able to support several | |
11509 | variants of the runtime, we use a sniffer that will determine | |
28010a5d | 11510 | the runtime variant used by the program being debugged. */ |
f7f9143b | 11511 | |
82eacd52 JB |
11512 | /* Ada's standard exceptions. |
11513 | ||
11514 | The Ada 83 standard also defined Numeric_Error. But there so many | |
11515 | situations where it was unclear from the Ada 83 Reference Manual | |
11516 | (RM) whether Constraint_Error or Numeric_Error should be raised, | |
11517 | that the ARG (Ada Rapporteur Group) eventually issued a Binding | |
11518 | Interpretation saying that anytime the RM says that Numeric_Error | |
11519 | should be raised, the implementation may raise Constraint_Error. | |
11520 | Ada 95 went one step further and pretty much removed Numeric_Error | |
11521 | from the list of standard exceptions (it made it a renaming of | |
11522 | Constraint_Error, to help preserve compatibility when compiling | |
11523 | an Ada83 compiler). As such, we do not include Numeric_Error from | |
11524 | this list of standard exceptions. */ | |
3d0b0fa3 | 11525 | |
27087b7f | 11526 | static const char * const standard_exc[] = { |
3d0b0fa3 JB |
11527 | "constraint_error", |
11528 | "program_error", | |
11529 | "storage_error", | |
11530 | "tasking_error" | |
11531 | }; | |
11532 | ||
0259addd JB |
11533 | typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void); |
11534 | ||
11535 | /* A structure that describes how to support exception catchpoints | |
11536 | for a given executable. */ | |
11537 | ||
11538 | struct exception_support_info | |
11539 | { | |
11540 | /* The name of the symbol to break on in order to insert | |
11541 | a catchpoint on exceptions. */ | |
11542 | const char *catch_exception_sym; | |
11543 | ||
11544 | /* The name of the symbol to break on in order to insert | |
11545 | a catchpoint on unhandled exceptions. */ | |
11546 | const char *catch_exception_unhandled_sym; | |
11547 | ||
11548 | /* The name of the symbol to break on in order to insert | |
11549 | a catchpoint on failed assertions. */ | |
11550 | const char *catch_assert_sym; | |
11551 | ||
9f757bf7 XR |
11552 | /* The name of the symbol to break on in order to insert |
11553 | a catchpoint on exception handling. */ | |
11554 | const char *catch_handlers_sym; | |
11555 | ||
0259addd JB |
11556 | /* Assuming that the inferior just triggered an unhandled exception |
11557 | catchpoint, this function is responsible for returning the address | |
11558 | in inferior memory where the name of that exception is stored. | |
11559 | Return zero if the address could not be computed. */ | |
11560 | ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr; | |
11561 | }; | |
11562 | ||
11563 | static CORE_ADDR ada_unhandled_exception_name_addr (void); | |
11564 | static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void); | |
11565 | ||
11566 | /* The following exception support info structure describes how to | |
11567 | implement exception catchpoints with the latest version of the | |
ca683e3a | 11568 | Ada runtime (as of 2019-08-??). */ |
0259addd JB |
11569 | |
11570 | static const struct exception_support_info default_exception_support_info = | |
ca683e3a AO |
11571 | { |
11572 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11573 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11574 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
11575 | "__gnat_begin_handler_v1", /* catch_handlers_sym */ | |
11576 | ada_unhandled_exception_name_addr | |
11577 | }; | |
11578 | ||
11579 | /* The following exception support info structure describes how to | |
11580 | implement exception catchpoints with an earlier version of the | |
11581 | Ada runtime (as of 2007-03-06) using v0 of the EH ABI. */ | |
11582 | ||
11583 | static const struct exception_support_info exception_support_info_v0 = | |
0259addd JB |
11584 | { |
11585 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11586 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11587 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11588 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11589 | ada_unhandled_exception_name_addr |
11590 | }; | |
11591 | ||
11592 | /* The following exception support info structure describes how to | |
11593 | implement exception catchpoints with a slightly older version | |
11594 | of the Ada runtime. */ | |
11595 | ||
11596 | static const struct exception_support_info exception_support_info_fallback = | |
11597 | { | |
11598 | "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */ | |
11599 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11600 | "system__assertions__raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11601 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11602 | ada_unhandled_exception_name_addr_from_raise |
11603 | }; | |
11604 | ||
f17011e0 JB |
11605 | /* Return nonzero if we can detect the exception support routines |
11606 | described in EINFO. | |
11607 | ||
11608 | This function errors out if an abnormal situation is detected | |
11609 | (for instance, if we find the exception support routines, but | |
11610 | that support is found to be incomplete). */ | |
11611 | ||
11612 | static int | |
11613 | ada_has_this_exception_support (const struct exception_support_info *einfo) | |
11614 | { | |
11615 | struct symbol *sym; | |
11616 | ||
11617 | /* The symbol we're looking up is provided by a unit in the GNAT runtime | |
11618 | that should be compiled with debugging information. As a result, we | |
11619 | expect to find that symbol in the symtabs. */ | |
11620 | ||
11621 | sym = standard_lookup (einfo->catch_exception_sym, NULL, VAR_DOMAIN); | |
11622 | if (sym == NULL) | |
a6af7abe JB |
11623 | { |
11624 | /* Perhaps we did not find our symbol because the Ada runtime was | |
11625 | compiled without debugging info, or simply stripped of it. | |
11626 | It happens on some GNU/Linux distributions for instance, where | |
11627 | users have to install a separate debug package in order to get | |
11628 | the runtime's debugging info. In that situation, let the user | |
11629 | know why we cannot insert an Ada exception catchpoint. | |
11630 | ||
11631 | Note: Just for the purpose of inserting our Ada exception | |
11632 | catchpoint, we could rely purely on the associated minimal symbol. | |
11633 | But we would be operating in degraded mode anyway, since we are | |
11634 | still lacking the debugging info needed later on to extract | |
11635 | the name of the exception being raised (this name is printed in | |
11636 | the catchpoint message, and is also used when trying to catch | |
11637 | a specific exception). We do not handle this case for now. */ | |
3b7344d5 | 11638 | struct bound_minimal_symbol msym |
1c8e84b0 JB |
11639 | = lookup_minimal_symbol (einfo->catch_exception_sym, NULL, NULL); |
11640 | ||
3b7344d5 | 11641 | if (msym.minsym && MSYMBOL_TYPE (msym.minsym) != mst_solib_trampoline) |
a6af7abe JB |
11642 | error (_("Your Ada runtime appears to be missing some debugging " |
11643 | "information.\nCannot insert Ada exception catchpoint " | |
11644 | "in this configuration.")); | |
11645 | ||
11646 | return 0; | |
11647 | } | |
f17011e0 JB |
11648 | |
11649 | /* Make sure that the symbol we found corresponds to a function. */ | |
11650 | ||
11651 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
ca683e3a AO |
11652 | { |
11653 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
987012b8 | 11654 | sym->linkage_name (), SYMBOL_CLASS (sym)); |
ca683e3a AO |
11655 | return 0; |
11656 | } | |
11657 | ||
11658 | sym = standard_lookup (einfo->catch_handlers_sym, NULL, VAR_DOMAIN); | |
11659 | if (sym == NULL) | |
11660 | { | |
11661 | struct bound_minimal_symbol msym | |
11662 | = lookup_minimal_symbol (einfo->catch_handlers_sym, NULL, NULL); | |
11663 | ||
11664 | if (msym.minsym && MSYMBOL_TYPE (msym.minsym) != mst_solib_trampoline) | |
11665 | error (_("Your Ada runtime appears to be missing some debugging " | |
11666 | "information.\nCannot insert Ada exception catchpoint " | |
11667 | "in this configuration.")); | |
11668 | ||
11669 | return 0; | |
11670 | } | |
11671 | ||
11672 | /* Make sure that the symbol we found corresponds to a function. */ | |
11673 | ||
11674 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
11675 | { | |
11676 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
987012b8 | 11677 | sym->linkage_name (), SYMBOL_CLASS (sym)); |
ca683e3a AO |
11678 | return 0; |
11679 | } | |
f17011e0 JB |
11680 | |
11681 | return 1; | |
11682 | } | |
11683 | ||
0259addd JB |
11684 | /* Inspect the Ada runtime and determine which exception info structure |
11685 | should be used to provide support for exception catchpoints. | |
11686 | ||
3eecfa55 JB |
11687 | This function will always set the per-inferior exception_info, |
11688 | or raise an error. */ | |
0259addd JB |
11689 | |
11690 | static void | |
11691 | ada_exception_support_info_sniffer (void) | |
11692 | { | |
3eecfa55 | 11693 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
0259addd JB |
11694 | |
11695 | /* If the exception info is already known, then no need to recompute it. */ | |
3eecfa55 | 11696 | if (data->exception_info != NULL) |
0259addd JB |
11697 | return; |
11698 | ||
11699 | /* Check the latest (default) exception support info. */ | |
f17011e0 | 11700 | if (ada_has_this_exception_support (&default_exception_support_info)) |
0259addd | 11701 | { |
3eecfa55 | 11702 | data->exception_info = &default_exception_support_info; |
0259addd JB |
11703 | return; |
11704 | } | |
11705 | ||
ca683e3a AO |
11706 | /* Try the v0 exception suport info. */ |
11707 | if (ada_has_this_exception_support (&exception_support_info_v0)) | |
11708 | { | |
11709 | data->exception_info = &exception_support_info_v0; | |
11710 | return; | |
11711 | } | |
11712 | ||
0259addd | 11713 | /* Try our fallback exception suport info. */ |
f17011e0 | 11714 | if (ada_has_this_exception_support (&exception_support_info_fallback)) |
0259addd | 11715 | { |
3eecfa55 | 11716 | data->exception_info = &exception_support_info_fallback; |
0259addd JB |
11717 | return; |
11718 | } | |
11719 | ||
11720 | /* Sometimes, it is normal for us to not be able to find the routine | |
11721 | we are looking for. This happens when the program is linked with | |
11722 | the shared version of the GNAT runtime, and the program has not been | |
11723 | started yet. Inform the user of these two possible causes if | |
11724 | applicable. */ | |
11725 | ||
ccefe4c4 | 11726 | if (ada_update_initial_language (language_unknown) != language_ada) |
0259addd JB |
11727 | error (_("Unable to insert catchpoint. Is this an Ada main program?")); |
11728 | ||
11729 | /* If the symbol does not exist, then check that the program is | |
11730 | already started, to make sure that shared libraries have been | |
11731 | loaded. If it is not started, this may mean that the symbol is | |
11732 | in a shared library. */ | |
11733 | ||
e99b03dc | 11734 | if (inferior_ptid.pid () == 0) |
0259addd JB |
11735 | error (_("Unable to insert catchpoint. Try to start the program first.")); |
11736 | ||
11737 | /* At this point, we know that we are debugging an Ada program and | |
11738 | that the inferior has been started, but we still are not able to | |
0963b4bd | 11739 | find the run-time symbols. That can mean that we are in |
0259addd JB |
11740 | configurable run time mode, or that a-except as been optimized |
11741 | out by the linker... In any case, at this point it is not worth | |
11742 | supporting this feature. */ | |
11743 | ||
7dda8cff | 11744 | error (_("Cannot insert Ada exception catchpoints in this configuration.")); |
0259addd JB |
11745 | } |
11746 | ||
f7f9143b JB |
11747 | /* True iff FRAME is very likely to be that of a function that is |
11748 | part of the runtime system. This is all very heuristic, but is | |
11749 | intended to be used as advice as to what frames are uninteresting | |
11750 | to most users. */ | |
11751 | ||
11752 | static int | |
11753 | is_known_support_routine (struct frame_info *frame) | |
11754 | { | |
692465f1 | 11755 | enum language func_lang; |
f7f9143b | 11756 | int i; |
f35a17b5 | 11757 | const char *fullname; |
f7f9143b | 11758 | |
4ed6b5be JB |
11759 | /* If this code does not have any debugging information (no symtab), |
11760 | This cannot be any user code. */ | |
f7f9143b | 11761 | |
51abb421 | 11762 | symtab_and_line sal = find_frame_sal (frame); |
f7f9143b JB |
11763 | if (sal.symtab == NULL) |
11764 | return 1; | |
11765 | ||
4ed6b5be JB |
11766 | /* If there is a symtab, but the associated source file cannot be |
11767 | located, then assume this is not user code: Selecting a frame | |
11768 | for which we cannot display the code would not be very helpful | |
11769 | for the user. This should also take care of case such as VxWorks | |
11770 | where the kernel has some debugging info provided for a few units. */ | |
f7f9143b | 11771 | |
f35a17b5 JK |
11772 | fullname = symtab_to_fullname (sal.symtab); |
11773 | if (access (fullname, R_OK) != 0) | |
f7f9143b JB |
11774 | return 1; |
11775 | ||
85102364 | 11776 | /* Check the unit filename against the Ada runtime file naming. |
4ed6b5be JB |
11777 | We also check the name of the objfile against the name of some |
11778 | known system libraries that sometimes come with debugging info | |
11779 | too. */ | |
11780 | ||
f7f9143b JB |
11781 | for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1) |
11782 | { | |
11783 | re_comp (known_runtime_file_name_patterns[i]); | |
f69c91ad | 11784 | if (re_exec (lbasename (sal.symtab->filename))) |
dda83cd7 | 11785 | return 1; |
eb822aa6 | 11786 | if (SYMTAB_OBJFILE (sal.symtab) != NULL |
dda83cd7 SM |
11787 | && re_exec (objfile_name (SYMTAB_OBJFILE (sal.symtab)))) |
11788 | return 1; | |
f7f9143b JB |
11789 | } |
11790 | ||
4ed6b5be | 11791 | /* Check whether the function is a GNAT-generated entity. */ |
f7f9143b | 11792 | |
c6dc63a1 TT |
11793 | gdb::unique_xmalloc_ptr<char> func_name |
11794 | = find_frame_funname (frame, &func_lang, NULL); | |
f7f9143b JB |
11795 | if (func_name == NULL) |
11796 | return 1; | |
11797 | ||
11798 | for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1) | |
11799 | { | |
11800 | re_comp (known_auxiliary_function_name_patterns[i]); | |
c6dc63a1 TT |
11801 | if (re_exec (func_name.get ())) |
11802 | return 1; | |
f7f9143b JB |
11803 | } |
11804 | ||
11805 | return 0; | |
11806 | } | |
11807 | ||
11808 | /* Find the first frame that contains debugging information and that is not | |
11809 | part of the Ada run-time, starting from FI and moving upward. */ | |
11810 | ||
0ef643c8 | 11811 | void |
f7f9143b JB |
11812 | ada_find_printable_frame (struct frame_info *fi) |
11813 | { | |
11814 | for (; fi != NULL; fi = get_prev_frame (fi)) | |
11815 | { | |
11816 | if (!is_known_support_routine (fi)) | |
dda83cd7 SM |
11817 | { |
11818 | select_frame (fi); | |
11819 | break; | |
11820 | } | |
f7f9143b JB |
11821 | } |
11822 | ||
11823 | } | |
11824 | ||
11825 | /* Assuming that the inferior just triggered an unhandled exception | |
11826 | catchpoint, return the address in inferior memory where the name | |
11827 | of the exception is stored. | |
11828 | ||
11829 | Return zero if the address could not be computed. */ | |
11830 | ||
11831 | static CORE_ADDR | |
11832 | ada_unhandled_exception_name_addr (void) | |
0259addd JB |
11833 | { |
11834 | return parse_and_eval_address ("e.full_name"); | |
11835 | } | |
11836 | ||
11837 | /* Same as ada_unhandled_exception_name_addr, except that this function | |
11838 | should be used when the inferior uses an older version of the runtime, | |
11839 | where the exception name needs to be extracted from a specific frame | |
11840 | several frames up in the callstack. */ | |
11841 | ||
11842 | static CORE_ADDR | |
11843 | ada_unhandled_exception_name_addr_from_raise (void) | |
f7f9143b JB |
11844 | { |
11845 | int frame_level; | |
11846 | struct frame_info *fi; | |
3eecfa55 | 11847 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
f7f9143b JB |
11848 | |
11849 | /* To determine the name of this exception, we need to select | |
11850 | the frame corresponding to RAISE_SYM_NAME. This frame is | |
11851 | at least 3 levels up, so we simply skip the first 3 frames | |
11852 | without checking the name of their associated function. */ | |
11853 | fi = get_current_frame (); | |
11854 | for (frame_level = 0; frame_level < 3; frame_level += 1) | |
11855 | if (fi != NULL) | |
11856 | fi = get_prev_frame (fi); | |
11857 | ||
11858 | while (fi != NULL) | |
11859 | { | |
692465f1 JB |
11860 | enum language func_lang; |
11861 | ||
c6dc63a1 TT |
11862 | gdb::unique_xmalloc_ptr<char> func_name |
11863 | = find_frame_funname (fi, &func_lang, NULL); | |
55b87a52 KS |
11864 | if (func_name != NULL) |
11865 | { | |
dda83cd7 | 11866 | if (strcmp (func_name.get (), |
55b87a52 KS |
11867 | data->exception_info->catch_exception_sym) == 0) |
11868 | break; /* We found the frame we were looking for... */ | |
55b87a52 | 11869 | } |
fb44b1a7 | 11870 | fi = get_prev_frame (fi); |
f7f9143b JB |
11871 | } |
11872 | ||
11873 | if (fi == NULL) | |
11874 | return 0; | |
11875 | ||
11876 | select_frame (fi); | |
11877 | return parse_and_eval_address ("id.full_name"); | |
11878 | } | |
11879 | ||
11880 | /* Assuming the inferior just triggered an Ada exception catchpoint | |
11881 | (of any type), return the address in inferior memory where the name | |
11882 | of the exception is stored, if applicable. | |
11883 | ||
45db7c09 PA |
11884 | Assumes the selected frame is the current frame. |
11885 | ||
f7f9143b JB |
11886 | Return zero if the address could not be computed, or if not relevant. */ |
11887 | ||
11888 | static CORE_ADDR | |
761269c8 | 11889 | ada_exception_name_addr_1 (enum ada_exception_catchpoint_kind ex, |
dda83cd7 | 11890 | struct breakpoint *b) |
f7f9143b | 11891 | { |
3eecfa55 JB |
11892 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
11893 | ||
f7f9143b JB |
11894 | switch (ex) |
11895 | { | |
761269c8 | 11896 | case ada_catch_exception: |
dda83cd7 SM |
11897 | return (parse_and_eval_address ("e.full_name")); |
11898 | break; | |
f7f9143b | 11899 | |
761269c8 | 11900 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
11901 | return data->exception_info->unhandled_exception_name_addr (); |
11902 | break; | |
9f757bf7 XR |
11903 | |
11904 | case ada_catch_handlers: | |
dda83cd7 | 11905 | return 0; /* The runtimes does not provide access to the exception |
9f757bf7 | 11906 | name. */ |
dda83cd7 | 11907 | break; |
9f757bf7 | 11908 | |
761269c8 | 11909 | case ada_catch_assert: |
dda83cd7 SM |
11910 | return 0; /* Exception name is not relevant in this case. */ |
11911 | break; | |
f7f9143b JB |
11912 | |
11913 | default: | |
dda83cd7 SM |
11914 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
11915 | break; | |
f7f9143b JB |
11916 | } |
11917 | ||
11918 | return 0; /* Should never be reached. */ | |
11919 | } | |
11920 | ||
e547c119 JB |
11921 | /* Assuming the inferior is stopped at an exception catchpoint, |
11922 | return the message which was associated to the exception, if | |
11923 | available. Return NULL if the message could not be retrieved. | |
11924 | ||
e547c119 JB |
11925 | Note: The exception message can be associated to an exception |
11926 | either through the use of the Raise_Exception function, or | |
11927 | more simply (Ada 2005 and later), via: | |
11928 | ||
11929 | raise Exception_Name with "exception message"; | |
11930 | ||
11931 | */ | |
11932 | ||
6f46ac85 | 11933 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
11934 | ada_exception_message_1 (void) |
11935 | { | |
11936 | struct value *e_msg_val; | |
e547c119 | 11937 | int e_msg_len; |
e547c119 JB |
11938 | |
11939 | /* For runtimes that support this feature, the exception message | |
11940 | is passed as an unbounded string argument called "message". */ | |
11941 | e_msg_val = parse_and_eval ("message"); | |
11942 | if (e_msg_val == NULL) | |
11943 | return NULL; /* Exception message not supported. */ | |
11944 | ||
11945 | e_msg_val = ada_coerce_to_simple_array (e_msg_val); | |
11946 | gdb_assert (e_msg_val != NULL); | |
11947 | e_msg_len = TYPE_LENGTH (value_type (e_msg_val)); | |
11948 | ||
11949 | /* If the message string is empty, then treat it as if there was | |
11950 | no exception message. */ | |
11951 | if (e_msg_len <= 0) | |
11952 | return NULL; | |
11953 | ||
15f3b077 TT |
11954 | gdb::unique_xmalloc_ptr<char> e_msg ((char *) xmalloc (e_msg_len + 1)); |
11955 | read_memory (value_address (e_msg_val), (gdb_byte *) e_msg.get (), | |
11956 | e_msg_len); | |
11957 | e_msg.get ()[e_msg_len] = '\0'; | |
11958 | ||
11959 | return e_msg; | |
e547c119 JB |
11960 | } |
11961 | ||
11962 | /* Same as ada_exception_message_1, except that all exceptions are | |
11963 | contained here (returning NULL instead). */ | |
11964 | ||
6f46ac85 | 11965 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
11966 | ada_exception_message (void) |
11967 | { | |
6f46ac85 | 11968 | gdb::unique_xmalloc_ptr<char> e_msg; |
e547c119 | 11969 | |
a70b8144 | 11970 | try |
e547c119 JB |
11971 | { |
11972 | e_msg = ada_exception_message_1 (); | |
11973 | } | |
230d2906 | 11974 | catch (const gdb_exception_error &e) |
e547c119 | 11975 | { |
6f46ac85 | 11976 | e_msg.reset (nullptr); |
e547c119 | 11977 | } |
e547c119 JB |
11978 | |
11979 | return e_msg; | |
11980 | } | |
11981 | ||
f7f9143b JB |
11982 | /* Same as ada_exception_name_addr_1, except that it intercepts and contains |
11983 | any error that ada_exception_name_addr_1 might cause to be thrown. | |
11984 | When an error is intercepted, a warning with the error message is printed, | |
11985 | and zero is returned. */ | |
11986 | ||
11987 | static CORE_ADDR | |
761269c8 | 11988 | ada_exception_name_addr (enum ada_exception_catchpoint_kind ex, |
dda83cd7 | 11989 | struct breakpoint *b) |
f7f9143b | 11990 | { |
f7f9143b JB |
11991 | CORE_ADDR result = 0; |
11992 | ||
a70b8144 | 11993 | try |
f7f9143b JB |
11994 | { |
11995 | result = ada_exception_name_addr_1 (ex, b); | |
11996 | } | |
11997 | ||
230d2906 | 11998 | catch (const gdb_exception_error &e) |
f7f9143b | 11999 | { |
3d6e9d23 | 12000 | warning (_("failed to get exception name: %s"), e.what ()); |
f7f9143b JB |
12001 | return 0; |
12002 | } | |
12003 | ||
12004 | return result; | |
12005 | } | |
12006 | ||
cb7de75e | 12007 | static std::string ada_exception_catchpoint_cond_string |
9f757bf7 XR |
12008 | (const char *excep_string, |
12009 | enum ada_exception_catchpoint_kind ex); | |
28010a5d PA |
12010 | |
12011 | /* Ada catchpoints. | |
12012 | ||
12013 | In the case of catchpoints on Ada exceptions, the catchpoint will | |
12014 | stop the target on every exception the program throws. When a user | |
12015 | specifies the name of a specific exception, we translate this | |
12016 | request into a condition expression (in text form), and then parse | |
12017 | it into an expression stored in each of the catchpoint's locations. | |
12018 | We then use this condition to check whether the exception that was | |
12019 | raised is the one the user is interested in. If not, then the | |
12020 | target is resumed again. We store the name of the requested | |
12021 | exception, in order to be able to re-set the condition expression | |
12022 | when symbols change. */ | |
12023 | ||
12024 | /* An instance of this type is used to represent an Ada catchpoint | |
5625a286 | 12025 | breakpoint location. */ |
28010a5d | 12026 | |
5625a286 | 12027 | class ada_catchpoint_location : public bp_location |
28010a5d | 12028 | { |
5625a286 | 12029 | public: |
5f486660 | 12030 | ada_catchpoint_location (breakpoint *owner) |
f06f1252 | 12031 | : bp_location (owner, bp_loc_software_breakpoint) |
5625a286 | 12032 | {} |
28010a5d PA |
12033 | |
12034 | /* The condition that checks whether the exception that was raised | |
12035 | is the specific exception the user specified on catchpoint | |
12036 | creation. */ | |
4d01a485 | 12037 | expression_up excep_cond_expr; |
28010a5d PA |
12038 | }; |
12039 | ||
c1fc2657 | 12040 | /* An instance of this type is used to represent an Ada catchpoint. */ |
28010a5d | 12041 | |
c1fc2657 | 12042 | struct ada_catchpoint : public breakpoint |
28010a5d | 12043 | { |
37f6a7f4 TT |
12044 | explicit ada_catchpoint (enum ada_exception_catchpoint_kind kind) |
12045 | : m_kind (kind) | |
12046 | { | |
12047 | } | |
12048 | ||
28010a5d | 12049 | /* The name of the specific exception the user specified. */ |
bc18fbb5 | 12050 | std::string excep_string; |
37f6a7f4 TT |
12051 | |
12052 | /* What kind of catchpoint this is. */ | |
12053 | enum ada_exception_catchpoint_kind m_kind; | |
28010a5d PA |
12054 | }; |
12055 | ||
12056 | /* Parse the exception condition string in the context of each of the | |
12057 | catchpoint's locations, and store them for later evaluation. */ | |
12058 | ||
12059 | static void | |
9f757bf7 | 12060 | create_excep_cond_exprs (struct ada_catchpoint *c, |
dda83cd7 | 12061 | enum ada_exception_catchpoint_kind ex) |
28010a5d | 12062 | { |
fccf9de1 TT |
12063 | struct bp_location *bl; |
12064 | ||
28010a5d | 12065 | /* Nothing to do if there's no specific exception to catch. */ |
bc18fbb5 | 12066 | if (c->excep_string.empty ()) |
28010a5d PA |
12067 | return; |
12068 | ||
12069 | /* Same if there are no locations... */ | |
c1fc2657 | 12070 | if (c->loc == NULL) |
28010a5d PA |
12071 | return; |
12072 | ||
fccf9de1 TT |
12073 | /* Compute the condition expression in text form, from the specific |
12074 | expection we want to catch. */ | |
12075 | std::string cond_string | |
12076 | = ada_exception_catchpoint_cond_string (c->excep_string.c_str (), ex); | |
28010a5d | 12077 | |
fccf9de1 TT |
12078 | /* Iterate over all the catchpoint's locations, and parse an |
12079 | expression for each. */ | |
12080 | for (bl = c->loc; bl != NULL; bl = bl->next) | |
28010a5d PA |
12081 | { |
12082 | struct ada_catchpoint_location *ada_loc | |
fccf9de1 | 12083 | = (struct ada_catchpoint_location *) bl; |
4d01a485 | 12084 | expression_up exp; |
28010a5d | 12085 | |
fccf9de1 | 12086 | if (!bl->shlib_disabled) |
28010a5d | 12087 | { |
bbc13ae3 | 12088 | const char *s; |
28010a5d | 12089 | |
cb7de75e | 12090 | s = cond_string.c_str (); |
a70b8144 | 12091 | try |
28010a5d | 12092 | { |
fccf9de1 TT |
12093 | exp = parse_exp_1 (&s, bl->address, |
12094 | block_for_pc (bl->address), | |
036e657b | 12095 | 0); |
28010a5d | 12096 | } |
230d2906 | 12097 | catch (const gdb_exception_error &e) |
849f2b52 JB |
12098 | { |
12099 | warning (_("failed to reevaluate internal exception condition " | |
12100 | "for catchpoint %d: %s"), | |
3d6e9d23 | 12101 | c->number, e.what ()); |
849f2b52 | 12102 | } |
28010a5d PA |
12103 | } |
12104 | ||
b22e99fd | 12105 | ada_loc->excep_cond_expr = std::move (exp); |
28010a5d | 12106 | } |
28010a5d PA |
12107 | } |
12108 | ||
28010a5d PA |
12109 | /* Implement the ALLOCATE_LOCATION method in the breakpoint_ops |
12110 | structure for all exception catchpoint kinds. */ | |
12111 | ||
12112 | static struct bp_location * | |
37f6a7f4 | 12113 | allocate_location_exception (struct breakpoint *self) |
28010a5d | 12114 | { |
5f486660 | 12115 | return new ada_catchpoint_location (self); |
28010a5d PA |
12116 | } |
12117 | ||
12118 | /* Implement the RE_SET method in the breakpoint_ops structure for all | |
12119 | exception catchpoint kinds. */ | |
12120 | ||
12121 | static void | |
37f6a7f4 | 12122 | re_set_exception (struct breakpoint *b) |
28010a5d PA |
12123 | { |
12124 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; | |
12125 | ||
12126 | /* Call the base class's method. This updates the catchpoint's | |
12127 | locations. */ | |
2060206e | 12128 | bkpt_breakpoint_ops.re_set (b); |
28010a5d PA |
12129 | |
12130 | /* Reparse the exception conditional expressions. One for each | |
12131 | location. */ | |
37f6a7f4 | 12132 | create_excep_cond_exprs (c, c->m_kind); |
28010a5d PA |
12133 | } |
12134 | ||
12135 | /* Returns true if we should stop for this breakpoint hit. If the | |
12136 | user specified a specific exception, we only want to cause a stop | |
12137 | if the program thrown that exception. */ | |
12138 | ||
12139 | static int | |
12140 | should_stop_exception (const struct bp_location *bl) | |
12141 | { | |
12142 | struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner; | |
12143 | const struct ada_catchpoint_location *ada_loc | |
12144 | = (const struct ada_catchpoint_location *) bl; | |
28010a5d PA |
12145 | int stop; |
12146 | ||
37f6a7f4 TT |
12147 | struct internalvar *var = lookup_internalvar ("_ada_exception"); |
12148 | if (c->m_kind == ada_catch_assert) | |
12149 | clear_internalvar (var); | |
12150 | else | |
12151 | { | |
12152 | try | |
12153 | { | |
12154 | const char *expr; | |
12155 | ||
12156 | if (c->m_kind == ada_catch_handlers) | |
12157 | expr = ("GNAT_GCC_exception_Access(gcc_exception)" | |
12158 | ".all.occurrence.id"); | |
12159 | else | |
12160 | expr = "e"; | |
12161 | ||
12162 | struct value *exc = parse_and_eval (expr); | |
12163 | set_internalvar (var, exc); | |
12164 | } | |
12165 | catch (const gdb_exception_error &ex) | |
12166 | { | |
12167 | clear_internalvar (var); | |
12168 | } | |
12169 | } | |
12170 | ||
28010a5d | 12171 | /* With no specific exception, should always stop. */ |
bc18fbb5 | 12172 | if (c->excep_string.empty ()) |
28010a5d PA |
12173 | return 1; |
12174 | ||
12175 | if (ada_loc->excep_cond_expr == NULL) | |
12176 | { | |
12177 | /* We will have a NULL expression if back when we were creating | |
12178 | the expressions, this location's had failed to parse. */ | |
12179 | return 1; | |
12180 | } | |
12181 | ||
12182 | stop = 1; | |
a70b8144 | 12183 | try |
28010a5d PA |
12184 | { |
12185 | struct value *mark; | |
12186 | ||
12187 | mark = value_mark (); | |
4d01a485 | 12188 | stop = value_true (evaluate_expression (ada_loc->excep_cond_expr.get ())); |
28010a5d PA |
12189 | value_free_to_mark (mark); |
12190 | } | |
230d2906 | 12191 | catch (const gdb_exception &ex) |
492d29ea PA |
12192 | { |
12193 | exception_fprintf (gdb_stderr, ex, | |
12194 | _("Error in testing exception condition:\n")); | |
12195 | } | |
492d29ea | 12196 | |
28010a5d PA |
12197 | return stop; |
12198 | } | |
12199 | ||
12200 | /* Implement the CHECK_STATUS method in the breakpoint_ops structure | |
12201 | for all exception catchpoint kinds. */ | |
12202 | ||
12203 | static void | |
37f6a7f4 | 12204 | check_status_exception (bpstat bs) |
28010a5d | 12205 | { |
b6433ede | 12206 | bs->stop = should_stop_exception (bs->bp_location_at.get ()); |
28010a5d PA |
12207 | } |
12208 | ||
f7f9143b JB |
12209 | /* Implement the PRINT_IT method in the breakpoint_ops structure |
12210 | for all exception catchpoint kinds. */ | |
12211 | ||
12212 | static enum print_stop_action | |
37f6a7f4 | 12213 | print_it_exception (bpstat bs) |
f7f9143b | 12214 | { |
79a45e25 | 12215 | struct ui_out *uiout = current_uiout; |
348d480f PA |
12216 | struct breakpoint *b = bs->breakpoint_at; |
12217 | ||
956a9fb9 | 12218 | annotate_catchpoint (b->number); |
f7f9143b | 12219 | |
112e8700 | 12220 | if (uiout->is_mi_like_p ()) |
f7f9143b | 12221 | { |
112e8700 | 12222 | uiout->field_string ("reason", |
956a9fb9 | 12223 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
112e8700 | 12224 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
f7f9143b JB |
12225 | } |
12226 | ||
112e8700 SM |
12227 | uiout->text (b->disposition == disp_del |
12228 | ? "\nTemporary catchpoint " : "\nCatchpoint "); | |
381befee | 12229 | uiout->field_signed ("bkptno", b->number); |
112e8700 | 12230 | uiout->text (", "); |
f7f9143b | 12231 | |
45db7c09 PA |
12232 | /* ada_exception_name_addr relies on the selected frame being the |
12233 | current frame. Need to do this here because this function may be | |
12234 | called more than once when printing a stop, and below, we'll | |
12235 | select the first frame past the Ada run-time (see | |
12236 | ada_find_printable_frame). */ | |
12237 | select_frame (get_current_frame ()); | |
12238 | ||
37f6a7f4 TT |
12239 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
12240 | switch (c->m_kind) | |
f7f9143b | 12241 | { |
761269c8 JB |
12242 | case ada_catch_exception: |
12243 | case ada_catch_exception_unhandled: | |
9f757bf7 | 12244 | case ada_catch_handlers: |
956a9fb9 | 12245 | { |
37f6a7f4 | 12246 | const CORE_ADDR addr = ada_exception_name_addr (c->m_kind, b); |
956a9fb9 JB |
12247 | char exception_name[256]; |
12248 | ||
12249 | if (addr != 0) | |
12250 | { | |
c714b426 PA |
12251 | read_memory (addr, (gdb_byte *) exception_name, |
12252 | sizeof (exception_name) - 1); | |
956a9fb9 JB |
12253 | exception_name [sizeof (exception_name) - 1] = '\0'; |
12254 | } | |
12255 | else | |
12256 | { | |
12257 | /* For some reason, we were unable to read the exception | |
12258 | name. This could happen if the Runtime was compiled | |
12259 | without debugging info, for instance. In that case, | |
12260 | just replace the exception name by the generic string | |
12261 | "exception" - it will read as "an exception" in the | |
12262 | notification we are about to print. */ | |
967cff16 | 12263 | memcpy (exception_name, "exception", sizeof ("exception")); |
956a9fb9 JB |
12264 | } |
12265 | /* In the case of unhandled exception breakpoints, we print | |
12266 | the exception name as "unhandled EXCEPTION_NAME", to make | |
12267 | it clearer to the user which kind of catchpoint just got | |
12268 | hit. We used ui_out_text to make sure that this extra | |
12269 | info does not pollute the exception name in the MI case. */ | |
37f6a7f4 | 12270 | if (c->m_kind == ada_catch_exception_unhandled) |
112e8700 SM |
12271 | uiout->text ("unhandled "); |
12272 | uiout->field_string ("exception-name", exception_name); | |
956a9fb9 JB |
12273 | } |
12274 | break; | |
761269c8 | 12275 | case ada_catch_assert: |
956a9fb9 JB |
12276 | /* In this case, the name of the exception is not really |
12277 | important. Just print "failed assertion" to make it clearer | |
12278 | that his program just hit an assertion-failure catchpoint. | |
12279 | We used ui_out_text because this info does not belong in | |
12280 | the MI output. */ | |
112e8700 | 12281 | uiout->text ("failed assertion"); |
956a9fb9 | 12282 | break; |
f7f9143b | 12283 | } |
e547c119 | 12284 | |
6f46ac85 | 12285 | gdb::unique_xmalloc_ptr<char> exception_message = ada_exception_message (); |
e547c119 JB |
12286 | if (exception_message != NULL) |
12287 | { | |
e547c119 | 12288 | uiout->text (" ("); |
6f46ac85 | 12289 | uiout->field_string ("exception-message", exception_message.get ()); |
e547c119 | 12290 | uiout->text (")"); |
e547c119 JB |
12291 | } |
12292 | ||
112e8700 | 12293 | uiout->text (" at "); |
956a9fb9 | 12294 | ada_find_printable_frame (get_current_frame ()); |
f7f9143b JB |
12295 | |
12296 | return PRINT_SRC_AND_LOC; | |
12297 | } | |
12298 | ||
12299 | /* Implement the PRINT_ONE method in the breakpoint_ops structure | |
12300 | for all exception catchpoint kinds. */ | |
12301 | ||
12302 | static void | |
37f6a7f4 | 12303 | print_one_exception (struct breakpoint *b, struct bp_location **last_loc) |
f7f9143b | 12304 | { |
79a45e25 | 12305 | struct ui_out *uiout = current_uiout; |
28010a5d | 12306 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
79a45b7d TT |
12307 | struct value_print_options opts; |
12308 | ||
12309 | get_user_print_options (&opts); | |
f06f1252 | 12310 | |
79a45b7d | 12311 | if (opts.addressprint) |
f06f1252 | 12312 | uiout->field_skip ("addr"); |
f7f9143b JB |
12313 | |
12314 | annotate_field (5); | |
37f6a7f4 | 12315 | switch (c->m_kind) |
f7f9143b | 12316 | { |
761269c8 | 12317 | case ada_catch_exception: |
dda83cd7 SM |
12318 | if (!c->excep_string.empty ()) |
12319 | { | |
bc18fbb5 TT |
12320 | std::string msg = string_printf (_("`%s' Ada exception"), |
12321 | c->excep_string.c_str ()); | |
28010a5d | 12322 | |
dda83cd7 SM |
12323 | uiout->field_string ("what", msg); |
12324 | } | |
12325 | else | |
12326 | uiout->field_string ("what", "all Ada exceptions"); | |
12327 | ||
12328 | break; | |
f7f9143b | 12329 | |
761269c8 | 12330 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12331 | uiout->field_string ("what", "unhandled Ada exceptions"); |
12332 | break; | |
f7f9143b | 12333 | |
9f757bf7 | 12334 | case ada_catch_handlers: |
dda83cd7 SM |
12335 | if (!c->excep_string.empty ()) |
12336 | { | |
9f757bf7 XR |
12337 | uiout->field_fmt ("what", |
12338 | _("`%s' Ada exception handlers"), | |
bc18fbb5 | 12339 | c->excep_string.c_str ()); |
dda83cd7 SM |
12340 | } |
12341 | else | |
9f757bf7 | 12342 | uiout->field_string ("what", "all Ada exceptions handlers"); |
dda83cd7 | 12343 | break; |
9f757bf7 | 12344 | |
761269c8 | 12345 | case ada_catch_assert: |
dda83cd7 SM |
12346 | uiout->field_string ("what", "failed Ada assertions"); |
12347 | break; | |
f7f9143b JB |
12348 | |
12349 | default: | |
dda83cd7 SM |
12350 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
12351 | break; | |
f7f9143b JB |
12352 | } |
12353 | } | |
12354 | ||
12355 | /* Implement the PRINT_MENTION method in the breakpoint_ops structure | |
12356 | for all exception catchpoint kinds. */ | |
12357 | ||
12358 | static void | |
37f6a7f4 | 12359 | print_mention_exception (struct breakpoint *b) |
f7f9143b | 12360 | { |
28010a5d | 12361 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
79a45e25 | 12362 | struct ui_out *uiout = current_uiout; |
28010a5d | 12363 | |
112e8700 | 12364 | uiout->text (b->disposition == disp_del ? _("Temporary catchpoint ") |
dda83cd7 | 12365 | : _("Catchpoint ")); |
381befee | 12366 | uiout->field_signed ("bkptno", b->number); |
112e8700 | 12367 | uiout->text (": "); |
00eb2c4a | 12368 | |
37f6a7f4 | 12369 | switch (c->m_kind) |
f7f9143b | 12370 | { |
761269c8 | 12371 | case ada_catch_exception: |
dda83cd7 | 12372 | if (!c->excep_string.empty ()) |
00eb2c4a | 12373 | { |
862d101a | 12374 | std::string info = string_printf (_("`%s' Ada exception"), |
bc18fbb5 | 12375 | c->excep_string.c_str ()); |
862d101a | 12376 | uiout->text (info.c_str ()); |
00eb2c4a | 12377 | } |
dda83cd7 SM |
12378 | else |
12379 | uiout->text (_("all Ada exceptions")); | |
12380 | break; | |
f7f9143b | 12381 | |
761269c8 | 12382 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12383 | uiout->text (_("unhandled Ada exceptions")); |
12384 | break; | |
9f757bf7 XR |
12385 | |
12386 | case ada_catch_handlers: | |
dda83cd7 | 12387 | if (!c->excep_string.empty ()) |
9f757bf7 XR |
12388 | { |
12389 | std::string info | |
12390 | = string_printf (_("`%s' Ada exception handlers"), | |
bc18fbb5 | 12391 | c->excep_string.c_str ()); |
9f757bf7 XR |
12392 | uiout->text (info.c_str ()); |
12393 | } | |
dda83cd7 SM |
12394 | else |
12395 | uiout->text (_("all Ada exceptions handlers")); | |
12396 | break; | |
9f757bf7 | 12397 | |
761269c8 | 12398 | case ada_catch_assert: |
dda83cd7 SM |
12399 | uiout->text (_("failed Ada assertions")); |
12400 | break; | |
f7f9143b JB |
12401 | |
12402 | default: | |
dda83cd7 SM |
12403 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
12404 | break; | |
f7f9143b JB |
12405 | } |
12406 | } | |
12407 | ||
6149aea9 PA |
12408 | /* Implement the PRINT_RECREATE method in the breakpoint_ops structure |
12409 | for all exception catchpoint kinds. */ | |
12410 | ||
12411 | static void | |
37f6a7f4 | 12412 | print_recreate_exception (struct breakpoint *b, struct ui_file *fp) |
6149aea9 | 12413 | { |
28010a5d PA |
12414 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
12415 | ||
37f6a7f4 | 12416 | switch (c->m_kind) |
6149aea9 | 12417 | { |
761269c8 | 12418 | case ada_catch_exception: |
6149aea9 | 12419 | fprintf_filtered (fp, "catch exception"); |
bc18fbb5 TT |
12420 | if (!c->excep_string.empty ()) |
12421 | fprintf_filtered (fp, " %s", c->excep_string.c_str ()); | |
6149aea9 PA |
12422 | break; |
12423 | ||
761269c8 | 12424 | case ada_catch_exception_unhandled: |
78076abc | 12425 | fprintf_filtered (fp, "catch exception unhandled"); |
6149aea9 PA |
12426 | break; |
12427 | ||
9f757bf7 XR |
12428 | case ada_catch_handlers: |
12429 | fprintf_filtered (fp, "catch handlers"); | |
12430 | break; | |
12431 | ||
761269c8 | 12432 | case ada_catch_assert: |
6149aea9 PA |
12433 | fprintf_filtered (fp, "catch assert"); |
12434 | break; | |
12435 | ||
12436 | default: | |
12437 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); | |
12438 | } | |
d9b3f62e | 12439 | print_recreate_thread (b, fp); |
6149aea9 PA |
12440 | } |
12441 | ||
37f6a7f4 | 12442 | /* Virtual tables for various breakpoint types. */ |
2060206e | 12443 | static struct breakpoint_ops catch_exception_breakpoint_ops; |
2060206e | 12444 | static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops; |
2060206e | 12445 | static struct breakpoint_ops catch_assert_breakpoint_ops; |
9f757bf7 XR |
12446 | static struct breakpoint_ops catch_handlers_breakpoint_ops; |
12447 | ||
f06f1252 TT |
12448 | /* See ada-lang.h. */ |
12449 | ||
12450 | bool | |
12451 | is_ada_exception_catchpoint (breakpoint *bp) | |
12452 | { | |
12453 | return (bp->ops == &catch_exception_breakpoint_ops | |
12454 | || bp->ops == &catch_exception_unhandled_breakpoint_ops | |
12455 | || bp->ops == &catch_assert_breakpoint_ops | |
12456 | || bp->ops == &catch_handlers_breakpoint_ops); | |
12457 | } | |
12458 | ||
f7f9143b JB |
12459 | /* Split the arguments specified in a "catch exception" command. |
12460 | Set EX to the appropriate catchpoint type. | |
28010a5d | 12461 | Set EXCEP_STRING to the name of the specific exception if |
5845583d | 12462 | specified by the user. |
9f757bf7 XR |
12463 | IS_CATCH_HANDLERS_CMD: True if the arguments are for a |
12464 | "catch handlers" command. False otherwise. | |
5845583d JB |
12465 | If a condition is found at the end of the arguments, the condition |
12466 | expression is stored in COND_STRING (memory must be deallocated | |
12467 | after use). Otherwise COND_STRING is set to NULL. */ | |
f7f9143b JB |
12468 | |
12469 | static void | |
a121b7c1 | 12470 | catch_ada_exception_command_split (const char *args, |
9f757bf7 | 12471 | bool is_catch_handlers_cmd, |
dda83cd7 | 12472 | enum ada_exception_catchpoint_kind *ex, |
bc18fbb5 TT |
12473 | std::string *excep_string, |
12474 | std::string *cond_string) | |
f7f9143b | 12475 | { |
bc18fbb5 | 12476 | std::string exception_name; |
f7f9143b | 12477 | |
bc18fbb5 TT |
12478 | exception_name = extract_arg (&args); |
12479 | if (exception_name == "if") | |
5845583d JB |
12480 | { |
12481 | /* This is not an exception name; this is the start of a condition | |
12482 | expression for a catchpoint on all exceptions. So, "un-get" | |
12483 | this token, and set exception_name to NULL. */ | |
bc18fbb5 | 12484 | exception_name.clear (); |
5845583d JB |
12485 | args -= 2; |
12486 | } | |
f7f9143b | 12487 | |
5845583d | 12488 | /* Check to see if we have a condition. */ |
f7f9143b | 12489 | |
f1735a53 | 12490 | args = skip_spaces (args); |
61012eef | 12491 | if (startswith (args, "if") |
5845583d JB |
12492 | && (isspace (args[2]) || args[2] == '\0')) |
12493 | { | |
12494 | args += 2; | |
f1735a53 | 12495 | args = skip_spaces (args); |
5845583d JB |
12496 | |
12497 | if (args[0] == '\0') | |
dda83cd7 | 12498 | error (_("Condition missing after `if' keyword")); |
bc18fbb5 | 12499 | *cond_string = args; |
5845583d JB |
12500 | |
12501 | args += strlen (args); | |
12502 | } | |
12503 | ||
12504 | /* Check that we do not have any more arguments. Anything else | |
12505 | is unexpected. */ | |
f7f9143b JB |
12506 | |
12507 | if (args[0] != '\0') | |
12508 | error (_("Junk at end of expression")); | |
12509 | ||
9f757bf7 XR |
12510 | if (is_catch_handlers_cmd) |
12511 | { | |
12512 | /* Catch handling of exceptions. */ | |
12513 | *ex = ada_catch_handlers; | |
12514 | *excep_string = exception_name; | |
12515 | } | |
bc18fbb5 | 12516 | else if (exception_name.empty ()) |
f7f9143b JB |
12517 | { |
12518 | /* Catch all exceptions. */ | |
761269c8 | 12519 | *ex = ada_catch_exception; |
bc18fbb5 | 12520 | excep_string->clear (); |
f7f9143b | 12521 | } |
bc18fbb5 | 12522 | else if (exception_name == "unhandled") |
f7f9143b JB |
12523 | { |
12524 | /* Catch unhandled exceptions. */ | |
761269c8 | 12525 | *ex = ada_catch_exception_unhandled; |
bc18fbb5 | 12526 | excep_string->clear (); |
f7f9143b JB |
12527 | } |
12528 | else | |
12529 | { | |
12530 | /* Catch a specific exception. */ | |
761269c8 | 12531 | *ex = ada_catch_exception; |
28010a5d | 12532 | *excep_string = exception_name; |
f7f9143b JB |
12533 | } |
12534 | } | |
12535 | ||
12536 | /* Return the name of the symbol on which we should break in order to | |
12537 | implement a catchpoint of the EX kind. */ | |
12538 | ||
12539 | static const char * | |
761269c8 | 12540 | ada_exception_sym_name (enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12541 | { |
3eecfa55 JB |
12542 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
12543 | ||
12544 | gdb_assert (data->exception_info != NULL); | |
0259addd | 12545 | |
f7f9143b JB |
12546 | switch (ex) |
12547 | { | |
761269c8 | 12548 | case ada_catch_exception: |
dda83cd7 SM |
12549 | return (data->exception_info->catch_exception_sym); |
12550 | break; | |
761269c8 | 12551 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12552 | return (data->exception_info->catch_exception_unhandled_sym); |
12553 | break; | |
761269c8 | 12554 | case ada_catch_assert: |
dda83cd7 SM |
12555 | return (data->exception_info->catch_assert_sym); |
12556 | break; | |
9f757bf7 | 12557 | case ada_catch_handlers: |
dda83cd7 SM |
12558 | return (data->exception_info->catch_handlers_sym); |
12559 | break; | |
f7f9143b | 12560 | default: |
dda83cd7 SM |
12561 | internal_error (__FILE__, __LINE__, |
12562 | _("unexpected catchpoint kind (%d)"), ex); | |
f7f9143b JB |
12563 | } |
12564 | } | |
12565 | ||
12566 | /* Return the breakpoint ops "virtual table" used for catchpoints | |
12567 | of the EX kind. */ | |
12568 | ||
c0a91b2b | 12569 | static const struct breakpoint_ops * |
761269c8 | 12570 | ada_exception_breakpoint_ops (enum ada_exception_catchpoint_kind ex) |
f7f9143b JB |
12571 | { |
12572 | switch (ex) | |
12573 | { | |
761269c8 | 12574 | case ada_catch_exception: |
dda83cd7 SM |
12575 | return (&catch_exception_breakpoint_ops); |
12576 | break; | |
761269c8 | 12577 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12578 | return (&catch_exception_unhandled_breakpoint_ops); |
12579 | break; | |
761269c8 | 12580 | case ada_catch_assert: |
dda83cd7 SM |
12581 | return (&catch_assert_breakpoint_ops); |
12582 | break; | |
9f757bf7 | 12583 | case ada_catch_handlers: |
dda83cd7 SM |
12584 | return (&catch_handlers_breakpoint_ops); |
12585 | break; | |
f7f9143b | 12586 | default: |
dda83cd7 SM |
12587 | internal_error (__FILE__, __LINE__, |
12588 | _("unexpected catchpoint kind (%d)"), ex); | |
f7f9143b JB |
12589 | } |
12590 | } | |
12591 | ||
12592 | /* Return the condition that will be used to match the current exception | |
12593 | being raised with the exception that the user wants to catch. This | |
12594 | assumes that this condition is used when the inferior just triggered | |
12595 | an exception catchpoint. | |
cb7de75e | 12596 | EX: the type of catchpoints used for catching Ada exceptions. */ |
f7f9143b | 12597 | |
cb7de75e | 12598 | static std::string |
9f757bf7 | 12599 | ada_exception_catchpoint_cond_string (const char *excep_string, |
dda83cd7 | 12600 | enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12601 | { |
3d0b0fa3 | 12602 | int i; |
fccf9de1 | 12603 | bool is_standard_exc = false; |
cb7de75e | 12604 | std::string result; |
9f757bf7 XR |
12605 | |
12606 | if (ex == ada_catch_handlers) | |
12607 | { | |
12608 | /* For exception handlers catchpoints, the condition string does | |
dda83cd7 | 12609 | not use the same parameter as for the other exceptions. */ |
fccf9de1 TT |
12610 | result = ("long_integer (GNAT_GCC_exception_Access" |
12611 | "(gcc_exception).all.occurrence.id)"); | |
9f757bf7 XR |
12612 | } |
12613 | else | |
fccf9de1 | 12614 | result = "long_integer (e)"; |
3d0b0fa3 | 12615 | |
0963b4bd | 12616 | /* The standard exceptions are a special case. They are defined in |
3d0b0fa3 | 12617 | runtime units that have been compiled without debugging info; if |
28010a5d | 12618 | EXCEP_STRING is the not-fully-qualified name of a standard |
3d0b0fa3 JB |
12619 | exception (e.g. "constraint_error") then, during the evaluation |
12620 | of the condition expression, the symbol lookup on this name would | |
0963b4bd | 12621 | *not* return this standard exception. The catchpoint condition |
3d0b0fa3 JB |
12622 | may then be set only on user-defined exceptions which have the |
12623 | same not-fully-qualified name (e.g. my_package.constraint_error). | |
12624 | ||
12625 | To avoid this unexcepted behavior, these standard exceptions are | |
0963b4bd | 12626 | systematically prefixed by "standard". This means that "catch |
3d0b0fa3 JB |
12627 | exception constraint_error" is rewritten into "catch exception |
12628 | standard.constraint_error". | |
12629 | ||
85102364 | 12630 | If an exception named constraint_error is defined in another package of |
3d0b0fa3 JB |
12631 | the inferior program, then the only way to specify this exception as a |
12632 | breakpoint condition is to use its fully-qualified named: | |
fccf9de1 | 12633 | e.g. my_package.constraint_error. */ |
3d0b0fa3 JB |
12634 | |
12635 | for (i = 0; i < sizeof (standard_exc) / sizeof (char *); i++) | |
12636 | { | |
28010a5d | 12637 | if (strcmp (standard_exc [i], excep_string) == 0) |
3d0b0fa3 | 12638 | { |
fccf9de1 | 12639 | is_standard_exc = true; |
9f757bf7 | 12640 | break; |
3d0b0fa3 JB |
12641 | } |
12642 | } | |
9f757bf7 | 12643 | |
fccf9de1 TT |
12644 | result += " = "; |
12645 | ||
12646 | if (is_standard_exc) | |
12647 | string_appendf (result, "long_integer (&standard.%s)", excep_string); | |
12648 | else | |
12649 | string_appendf (result, "long_integer (&%s)", excep_string); | |
9f757bf7 | 12650 | |
9f757bf7 | 12651 | return result; |
f7f9143b JB |
12652 | } |
12653 | ||
12654 | /* Return the symtab_and_line that should be used to insert an exception | |
12655 | catchpoint of the TYPE kind. | |
12656 | ||
28010a5d PA |
12657 | ADDR_STRING returns the name of the function where the real |
12658 | breakpoint that implements the catchpoints is set, depending on the | |
12659 | type of catchpoint we need to create. */ | |
f7f9143b JB |
12660 | |
12661 | static struct symtab_and_line | |
bc18fbb5 | 12662 | ada_exception_sal (enum ada_exception_catchpoint_kind ex, |
cc12f4a8 | 12663 | std::string *addr_string, const struct breakpoint_ops **ops) |
f7f9143b JB |
12664 | { |
12665 | const char *sym_name; | |
12666 | struct symbol *sym; | |
f7f9143b | 12667 | |
0259addd JB |
12668 | /* First, find out which exception support info to use. */ |
12669 | ada_exception_support_info_sniffer (); | |
12670 | ||
12671 | /* Then lookup the function on which we will break in order to catch | |
f7f9143b | 12672 | the Ada exceptions requested by the user. */ |
f7f9143b JB |
12673 | sym_name = ada_exception_sym_name (ex); |
12674 | sym = standard_lookup (sym_name, NULL, VAR_DOMAIN); | |
12675 | ||
57aff202 JB |
12676 | if (sym == NULL) |
12677 | error (_("Catchpoint symbol not found: %s"), sym_name); | |
12678 | ||
12679 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
12680 | error (_("Unable to insert catchpoint. %s is not a function."), sym_name); | |
f7f9143b JB |
12681 | |
12682 | /* Set ADDR_STRING. */ | |
cc12f4a8 | 12683 | *addr_string = sym_name; |
f7f9143b | 12684 | |
f7f9143b | 12685 | /* Set OPS. */ |
4b9eee8c | 12686 | *ops = ada_exception_breakpoint_ops (ex); |
f7f9143b | 12687 | |
f17011e0 | 12688 | return find_function_start_sal (sym, 1); |
f7f9143b JB |
12689 | } |
12690 | ||
b4a5b78b | 12691 | /* Create an Ada exception catchpoint. |
f7f9143b | 12692 | |
b4a5b78b | 12693 | EX_KIND is the kind of exception catchpoint to be created. |
5845583d | 12694 | |
bc18fbb5 | 12695 | If EXCEPT_STRING is empty, this catchpoint is expected to trigger |
2df4d1d5 | 12696 | for all exceptions. Otherwise, EXCEPT_STRING indicates the name |
bc18fbb5 | 12697 | of the exception to which this catchpoint applies. |
2df4d1d5 | 12698 | |
bc18fbb5 | 12699 | COND_STRING, if not empty, is the catchpoint condition. |
f7f9143b | 12700 | |
b4a5b78b JB |
12701 | TEMPFLAG, if nonzero, means that the underlying breakpoint |
12702 | should be temporary. | |
28010a5d | 12703 | |
b4a5b78b | 12704 | FROM_TTY is the usual argument passed to all commands implementations. */ |
28010a5d | 12705 | |
349774ef | 12706 | void |
28010a5d | 12707 | create_ada_exception_catchpoint (struct gdbarch *gdbarch, |
761269c8 | 12708 | enum ada_exception_catchpoint_kind ex_kind, |
bc18fbb5 | 12709 | const std::string &excep_string, |
56ecd069 | 12710 | const std::string &cond_string, |
28010a5d | 12711 | int tempflag, |
349774ef | 12712 | int disabled, |
28010a5d PA |
12713 | int from_tty) |
12714 | { | |
cc12f4a8 | 12715 | std::string addr_string; |
b4a5b78b | 12716 | const struct breakpoint_ops *ops = NULL; |
bc18fbb5 | 12717 | struct symtab_and_line sal = ada_exception_sal (ex_kind, &addr_string, &ops); |
28010a5d | 12718 | |
37f6a7f4 | 12719 | std::unique_ptr<ada_catchpoint> c (new ada_catchpoint (ex_kind)); |
cc12f4a8 | 12720 | init_ada_exception_breakpoint (c.get (), gdbarch, sal, addr_string.c_str (), |
349774ef | 12721 | ops, tempflag, disabled, from_tty); |
28010a5d | 12722 | c->excep_string = excep_string; |
9f757bf7 | 12723 | create_excep_cond_exprs (c.get (), ex_kind); |
56ecd069 | 12724 | if (!cond_string.empty ()) |
733d554a | 12725 | set_breakpoint_condition (c.get (), cond_string.c_str (), from_tty, false); |
b270e6f9 | 12726 | install_breakpoint (0, std::move (c), 1); |
f7f9143b JB |
12727 | } |
12728 | ||
9ac4176b PA |
12729 | /* Implement the "catch exception" command. */ |
12730 | ||
12731 | static void | |
eb4c3f4a | 12732 | catch_ada_exception_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12733 | struct cmd_list_element *command) |
12734 | { | |
a121b7c1 | 12735 | const char *arg = arg_entry; |
9ac4176b PA |
12736 | struct gdbarch *gdbarch = get_current_arch (); |
12737 | int tempflag; | |
761269c8 | 12738 | enum ada_exception_catchpoint_kind ex_kind; |
bc18fbb5 | 12739 | std::string excep_string; |
56ecd069 | 12740 | std::string cond_string; |
9ac4176b PA |
12741 | |
12742 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12743 | ||
12744 | if (!arg) | |
12745 | arg = ""; | |
9f757bf7 | 12746 | catch_ada_exception_command_split (arg, false, &ex_kind, &excep_string, |
bc18fbb5 | 12747 | &cond_string); |
9f757bf7 XR |
12748 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12749 | excep_string, cond_string, | |
12750 | tempflag, 1 /* enabled */, | |
12751 | from_tty); | |
12752 | } | |
12753 | ||
12754 | /* Implement the "catch handlers" command. */ | |
12755 | ||
12756 | static void | |
12757 | catch_ada_handlers_command (const char *arg_entry, int from_tty, | |
12758 | struct cmd_list_element *command) | |
12759 | { | |
12760 | const char *arg = arg_entry; | |
12761 | struct gdbarch *gdbarch = get_current_arch (); | |
12762 | int tempflag; | |
12763 | enum ada_exception_catchpoint_kind ex_kind; | |
bc18fbb5 | 12764 | std::string excep_string; |
56ecd069 | 12765 | std::string cond_string; |
9f757bf7 XR |
12766 | |
12767 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12768 | ||
12769 | if (!arg) | |
12770 | arg = ""; | |
12771 | catch_ada_exception_command_split (arg, true, &ex_kind, &excep_string, | |
bc18fbb5 | 12772 | &cond_string); |
b4a5b78b JB |
12773 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12774 | excep_string, cond_string, | |
349774ef JB |
12775 | tempflag, 1 /* enabled */, |
12776 | from_tty); | |
9ac4176b PA |
12777 | } |
12778 | ||
71bed2db TT |
12779 | /* Completion function for the Ada "catch" commands. */ |
12780 | ||
12781 | static void | |
12782 | catch_ada_completer (struct cmd_list_element *cmd, completion_tracker &tracker, | |
12783 | const char *text, const char *word) | |
12784 | { | |
12785 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (NULL); | |
12786 | ||
12787 | for (const ada_exc_info &info : exceptions) | |
12788 | { | |
12789 | if (startswith (info.name, word)) | |
b02f78f9 | 12790 | tracker.add_completion (make_unique_xstrdup (info.name)); |
71bed2db TT |
12791 | } |
12792 | } | |
12793 | ||
b4a5b78b | 12794 | /* Split the arguments specified in a "catch assert" command. |
5845583d | 12795 | |
b4a5b78b JB |
12796 | ARGS contains the command's arguments (or the empty string if |
12797 | no arguments were passed). | |
5845583d JB |
12798 | |
12799 | If ARGS contains a condition, set COND_STRING to that condition | |
b4a5b78b | 12800 | (the memory needs to be deallocated after use). */ |
5845583d | 12801 | |
b4a5b78b | 12802 | static void |
56ecd069 | 12803 | catch_ada_assert_command_split (const char *args, std::string &cond_string) |
f7f9143b | 12804 | { |
f1735a53 | 12805 | args = skip_spaces (args); |
f7f9143b | 12806 | |
5845583d | 12807 | /* Check whether a condition was provided. */ |
61012eef | 12808 | if (startswith (args, "if") |
5845583d | 12809 | && (isspace (args[2]) || args[2] == '\0')) |
f7f9143b | 12810 | { |
5845583d | 12811 | args += 2; |
f1735a53 | 12812 | args = skip_spaces (args); |
5845583d | 12813 | if (args[0] == '\0') |
dda83cd7 | 12814 | error (_("condition missing after `if' keyword")); |
56ecd069 | 12815 | cond_string.assign (args); |
f7f9143b JB |
12816 | } |
12817 | ||
5845583d JB |
12818 | /* Otherwise, there should be no other argument at the end of |
12819 | the command. */ | |
12820 | else if (args[0] != '\0') | |
12821 | error (_("Junk at end of arguments.")); | |
f7f9143b JB |
12822 | } |
12823 | ||
9ac4176b PA |
12824 | /* Implement the "catch assert" command. */ |
12825 | ||
12826 | static void | |
eb4c3f4a | 12827 | catch_assert_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12828 | struct cmd_list_element *command) |
12829 | { | |
a121b7c1 | 12830 | const char *arg = arg_entry; |
9ac4176b PA |
12831 | struct gdbarch *gdbarch = get_current_arch (); |
12832 | int tempflag; | |
56ecd069 | 12833 | std::string cond_string; |
9ac4176b PA |
12834 | |
12835 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12836 | ||
12837 | if (!arg) | |
12838 | arg = ""; | |
56ecd069 | 12839 | catch_ada_assert_command_split (arg, cond_string); |
761269c8 | 12840 | create_ada_exception_catchpoint (gdbarch, ada_catch_assert, |
241db429 | 12841 | "", cond_string, |
349774ef JB |
12842 | tempflag, 1 /* enabled */, |
12843 | from_tty); | |
9ac4176b | 12844 | } |
778865d3 JB |
12845 | |
12846 | /* Return non-zero if the symbol SYM is an Ada exception object. */ | |
12847 | ||
12848 | static int | |
12849 | ada_is_exception_sym (struct symbol *sym) | |
12850 | { | |
7d93a1e0 | 12851 | const char *type_name = SYMBOL_TYPE (sym)->name (); |
778865d3 JB |
12852 | |
12853 | return (SYMBOL_CLASS (sym) != LOC_TYPEDEF | |
dda83cd7 SM |
12854 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
12855 | && SYMBOL_CLASS (sym) != LOC_CONST | |
12856 | && SYMBOL_CLASS (sym) != LOC_UNRESOLVED | |
12857 | && type_name != NULL && strcmp (type_name, "exception") == 0); | |
778865d3 JB |
12858 | } |
12859 | ||
12860 | /* Given a global symbol SYM, return non-zero iff SYM is a non-standard | |
12861 | Ada exception object. This matches all exceptions except the ones | |
12862 | defined by the Ada language. */ | |
12863 | ||
12864 | static int | |
12865 | ada_is_non_standard_exception_sym (struct symbol *sym) | |
12866 | { | |
12867 | int i; | |
12868 | ||
12869 | if (!ada_is_exception_sym (sym)) | |
12870 | return 0; | |
12871 | ||
12872 | for (i = 0; i < ARRAY_SIZE (standard_exc); i++) | |
987012b8 | 12873 | if (strcmp (sym->linkage_name (), standard_exc[i]) == 0) |
778865d3 JB |
12874 | return 0; /* A standard exception. */ |
12875 | ||
12876 | /* Numeric_Error is also a standard exception, so exclude it. | |
12877 | See the STANDARD_EXC description for more details as to why | |
12878 | this exception is not listed in that array. */ | |
987012b8 | 12879 | if (strcmp (sym->linkage_name (), "numeric_error") == 0) |
778865d3 JB |
12880 | return 0; |
12881 | ||
12882 | return 1; | |
12883 | } | |
12884 | ||
ab816a27 | 12885 | /* A helper function for std::sort, comparing two struct ada_exc_info |
778865d3 JB |
12886 | objects. |
12887 | ||
12888 | The comparison is determined first by exception name, and then | |
12889 | by exception address. */ | |
12890 | ||
ab816a27 | 12891 | bool |
cc536b21 | 12892 | ada_exc_info::operator< (const ada_exc_info &other) const |
778865d3 | 12893 | { |
778865d3 JB |
12894 | int result; |
12895 | ||
ab816a27 TT |
12896 | result = strcmp (name, other.name); |
12897 | if (result < 0) | |
12898 | return true; | |
12899 | if (result == 0 && addr < other.addr) | |
12900 | return true; | |
12901 | return false; | |
12902 | } | |
778865d3 | 12903 | |
ab816a27 | 12904 | bool |
cc536b21 | 12905 | ada_exc_info::operator== (const ada_exc_info &other) const |
ab816a27 TT |
12906 | { |
12907 | return addr == other.addr && strcmp (name, other.name) == 0; | |
778865d3 JB |
12908 | } |
12909 | ||
12910 | /* Sort EXCEPTIONS using compare_ada_exception_info as the comparison | |
12911 | routine, but keeping the first SKIP elements untouched. | |
12912 | ||
12913 | All duplicates are also removed. */ | |
12914 | ||
12915 | static void | |
ab816a27 | 12916 | sort_remove_dups_ada_exceptions_list (std::vector<ada_exc_info> *exceptions, |
778865d3 JB |
12917 | int skip) |
12918 | { | |
ab816a27 TT |
12919 | std::sort (exceptions->begin () + skip, exceptions->end ()); |
12920 | exceptions->erase (std::unique (exceptions->begin () + skip, exceptions->end ()), | |
12921 | exceptions->end ()); | |
778865d3 JB |
12922 | } |
12923 | ||
778865d3 JB |
12924 | /* Add all exceptions defined by the Ada standard whose name match |
12925 | a regular expression. | |
12926 | ||
12927 | If PREG is not NULL, then this regexp_t object is used to | |
12928 | perform the symbol name matching. Otherwise, no name-based | |
12929 | filtering is performed. | |
12930 | ||
12931 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
12932 | gets pushed. */ | |
12933 | ||
12934 | static void | |
2d7cc5c7 | 12935 | ada_add_standard_exceptions (compiled_regex *preg, |
ab816a27 | 12936 | std::vector<ada_exc_info> *exceptions) |
778865d3 JB |
12937 | { |
12938 | int i; | |
12939 | ||
12940 | for (i = 0; i < ARRAY_SIZE (standard_exc); i++) | |
12941 | { | |
12942 | if (preg == NULL | |
2d7cc5c7 | 12943 | || preg->exec (standard_exc[i], 0, NULL, 0) == 0) |
778865d3 JB |
12944 | { |
12945 | struct bound_minimal_symbol msymbol | |
12946 | = ada_lookup_simple_minsym (standard_exc[i]); | |
12947 | ||
12948 | if (msymbol.minsym != NULL) | |
12949 | { | |
12950 | struct ada_exc_info info | |
77e371c0 | 12951 | = {standard_exc[i], BMSYMBOL_VALUE_ADDRESS (msymbol)}; |
778865d3 | 12952 | |
ab816a27 | 12953 | exceptions->push_back (info); |
778865d3 JB |
12954 | } |
12955 | } | |
12956 | } | |
12957 | } | |
12958 | ||
12959 | /* Add all Ada exceptions defined locally and accessible from the given | |
12960 | FRAME. | |
12961 | ||
12962 | If PREG is not NULL, then this regexp_t object is used to | |
12963 | perform the symbol name matching. Otherwise, no name-based | |
12964 | filtering is performed. | |
12965 | ||
12966 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
12967 | gets pushed. */ | |
12968 | ||
12969 | static void | |
2d7cc5c7 PA |
12970 | ada_add_exceptions_from_frame (compiled_regex *preg, |
12971 | struct frame_info *frame, | |
ab816a27 | 12972 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 12973 | { |
3977b71f | 12974 | const struct block *block = get_frame_block (frame, 0); |
778865d3 JB |
12975 | |
12976 | while (block != 0) | |
12977 | { | |
12978 | struct block_iterator iter; | |
12979 | struct symbol *sym; | |
12980 | ||
12981 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
12982 | { | |
12983 | switch (SYMBOL_CLASS (sym)) | |
12984 | { | |
12985 | case LOC_TYPEDEF: | |
12986 | case LOC_BLOCK: | |
12987 | case LOC_CONST: | |
12988 | break; | |
12989 | default: | |
12990 | if (ada_is_exception_sym (sym)) | |
12991 | { | |
987012b8 | 12992 | struct ada_exc_info info = {sym->print_name (), |
778865d3 JB |
12993 | SYMBOL_VALUE_ADDRESS (sym)}; |
12994 | ||
ab816a27 | 12995 | exceptions->push_back (info); |
778865d3 JB |
12996 | } |
12997 | } | |
12998 | } | |
12999 | if (BLOCK_FUNCTION (block) != NULL) | |
13000 | break; | |
13001 | block = BLOCK_SUPERBLOCK (block); | |
13002 | } | |
13003 | } | |
13004 | ||
14bc53a8 PA |
13005 | /* Return true if NAME matches PREG or if PREG is NULL. */ |
13006 | ||
13007 | static bool | |
2d7cc5c7 | 13008 | name_matches_regex (const char *name, compiled_regex *preg) |
14bc53a8 PA |
13009 | { |
13010 | return (preg == NULL | |
f945dedf | 13011 | || preg->exec (ada_decode (name).c_str (), 0, NULL, 0) == 0); |
14bc53a8 PA |
13012 | } |
13013 | ||
778865d3 JB |
13014 | /* Add all exceptions defined globally whose name name match |
13015 | a regular expression, excluding standard exceptions. | |
13016 | ||
13017 | The reason we exclude standard exceptions is that they need | |
13018 | to be handled separately: Standard exceptions are defined inside | |
13019 | a runtime unit which is normally not compiled with debugging info, | |
13020 | and thus usually do not show up in our symbol search. However, | |
13021 | if the unit was in fact built with debugging info, we need to | |
13022 | exclude them because they would duplicate the entry we found | |
13023 | during the special loop that specifically searches for those | |
13024 | standard exceptions. | |
13025 | ||
13026 | If PREG is not NULL, then this regexp_t object is used to | |
13027 | perform the symbol name matching. Otherwise, no name-based | |
13028 | filtering is performed. | |
13029 | ||
13030 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13031 | gets pushed. */ | |
13032 | ||
13033 | static void | |
2d7cc5c7 | 13034 | ada_add_global_exceptions (compiled_regex *preg, |
ab816a27 | 13035 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13036 | { |
14bc53a8 PA |
13037 | /* In Ada, the symbol "search name" is a linkage name, whereas the |
13038 | regular expression used to do the matching refers to the natural | |
13039 | name. So match against the decoded name. */ | |
13040 | expand_symtabs_matching (NULL, | |
b5ec771e | 13041 | lookup_name_info::match_any (), |
14bc53a8 PA |
13042 | [&] (const char *search_name) |
13043 | { | |
f945dedf CB |
13044 | std::string decoded = ada_decode (search_name); |
13045 | return name_matches_regex (decoded.c_str (), preg); | |
14bc53a8 PA |
13046 | }, |
13047 | NULL, | |
13048 | VARIABLES_DOMAIN); | |
778865d3 | 13049 | |
2030c079 | 13050 | for (objfile *objfile : current_program_space->objfiles ()) |
778865d3 | 13051 | { |
b669c953 | 13052 | for (compunit_symtab *s : objfile->compunits ()) |
778865d3 | 13053 | { |
d8aeb77f TT |
13054 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (s); |
13055 | int i; | |
778865d3 | 13056 | |
d8aeb77f TT |
13057 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
13058 | { | |
582942f4 | 13059 | const struct block *b = BLOCKVECTOR_BLOCK (bv, i); |
d8aeb77f TT |
13060 | struct block_iterator iter; |
13061 | struct symbol *sym; | |
778865d3 | 13062 | |
d8aeb77f TT |
13063 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
13064 | if (ada_is_non_standard_exception_sym (sym) | |
987012b8 | 13065 | && name_matches_regex (sym->natural_name (), preg)) |
d8aeb77f TT |
13066 | { |
13067 | struct ada_exc_info info | |
987012b8 | 13068 | = {sym->print_name (), SYMBOL_VALUE_ADDRESS (sym)}; |
d8aeb77f TT |
13069 | |
13070 | exceptions->push_back (info); | |
13071 | } | |
13072 | } | |
778865d3 JB |
13073 | } |
13074 | } | |
13075 | } | |
13076 | ||
13077 | /* Implements ada_exceptions_list with the regular expression passed | |
13078 | as a regex_t, rather than a string. | |
13079 | ||
13080 | If not NULL, PREG is used to filter out exceptions whose names | |
13081 | do not match. Otherwise, all exceptions are listed. */ | |
13082 | ||
ab816a27 | 13083 | static std::vector<ada_exc_info> |
2d7cc5c7 | 13084 | ada_exceptions_list_1 (compiled_regex *preg) |
778865d3 | 13085 | { |
ab816a27 | 13086 | std::vector<ada_exc_info> result; |
778865d3 JB |
13087 | int prev_len; |
13088 | ||
13089 | /* First, list the known standard exceptions. These exceptions | |
13090 | need to be handled separately, as they are usually defined in | |
13091 | runtime units that have been compiled without debugging info. */ | |
13092 | ||
13093 | ada_add_standard_exceptions (preg, &result); | |
13094 | ||
13095 | /* Next, find all exceptions whose scope is local and accessible | |
13096 | from the currently selected frame. */ | |
13097 | ||
13098 | if (has_stack_frames ()) | |
13099 | { | |
ab816a27 | 13100 | prev_len = result.size (); |
778865d3 JB |
13101 | ada_add_exceptions_from_frame (preg, get_selected_frame (NULL), |
13102 | &result); | |
ab816a27 | 13103 | if (result.size () > prev_len) |
778865d3 JB |
13104 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13105 | } | |
13106 | ||
13107 | /* Add all exceptions whose scope is global. */ | |
13108 | ||
ab816a27 | 13109 | prev_len = result.size (); |
778865d3 | 13110 | ada_add_global_exceptions (preg, &result); |
ab816a27 | 13111 | if (result.size () > prev_len) |
778865d3 JB |
13112 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13113 | ||
778865d3 JB |
13114 | return result; |
13115 | } | |
13116 | ||
13117 | /* Return a vector of ada_exc_info. | |
13118 | ||
13119 | If REGEXP is NULL, all exceptions are included in the result. | |
13120 | Otherwise, it should contain a valid regular expression, | |
13121 | and only the exceptions whose names match that regular expression | |
13122 | are included in the result. | |
13123 | ||
13124 | The exceptions are sorted in the following order: | |
13125 | - Standard exceptions (defined by the Ada language), in | |
13126 | alphabetical order; | |
13127 | - Exceptions only visible from the current frame, in | |
13128 | alphabetical order; | |
13129 | - Exceptions whose scope is global, in alphabetical order. */ | |
13130 | ||
ab816a27 | 13131 | std::vector<ada_exc_info> |
778865d3 JB |
13132 | ada_exceptions_list (const char *regexp) |
13133 | { | |
2d7cc5c7 PA |
13134 | if (regexp == NULL) |
13135 | return ada_exceptions_list_1 (NULL); | |
778865d3 | 13136 | |
2d7cc5c7 PA |
13137 | compiled_regex reg (regexp, REG_NOSUB, _("invalid regular expression")); |
13138 | return ada_exceptions_list_1 (®); | |
778865d3 JB |
13139 | } |
13140 | ||
13141 | /* Implement the "info exceptions" command. */ | |
13142 | ||
13143 | static void | |
1d12d88f | 13144 | info_exceptions_command (const char *regexp, int from_tty) |
778865d3 | 13145 | { |
778865d3 | 13146 | struct gdbarch *gdbarch = get_current_arch (); |
778865d3 | 13147 | |
ab816a27 | 13148 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (regexp); |
778865d3 JB |
13149 | |
13150 | if (regexp != NULL) | |
13151 | printf_filtered | |
13152 | (_("All Ada exceptions matching regular expression \"%s\":\n"), regexp); | |
13153 | else | |
13154 | printf_filtered (_("All defined Ada exceptions:\n")); | |
13155 | ||
ab816a27 TT |
13156 | for (const ada_exc_info &info : exceptions) |
13157 | printf_filtered ("%s: %s\n", info.name, paddress (gdbarch, info.addr)); | |
778865d3 JB |
13158 | } |
13159 | ||
dda83cd7 | 13160 | /* Operators */ |
4c4b4cd2 PH |
13161 | /* Information about operators given special treatment in functions |
13162 | below. */ | |
13163 | /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */ | |
13164 | ||
13165 | #define ADA_OPERATORS \ | |
13166 | OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \ | |
13167 | OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \ | |
13168 | OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \ | |
13169 | OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \ | |
13170 | OP_DEFN (OP_ATR_LAST, 1, 2, 0) \ | |
13171 | OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \ | |
13172 | OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \ | |
13173 | OP_DEFN (OP_ATR_MAX, 1, 3, 0) \ | |
13174 | OP_DEFN (OP_ATR_MIN, 1, 3, 0) \ | |
13175 | OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \ | |
13176 | OP_DEFN (OP_ATR_POS, 1, 2, 0) \ | |
13177 | OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \ | |
13178 | OP_DEFN (OP_ATR_TAG, 1, 1, 0) \ | |
13179 | OP_DEFN (OP_ATR_VAL, 1, 2, 0) \ | |
13180 | OP_DEFN (UNOP_QUAL, 3, 1, 0) \ | |
52ce6436 PH |
13181 | OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \ |
13182 | OP_DEFN (OP_OTHERS, 1, 1, 0) \ | |
13183 | OP_DEFN (OP_POSITIONAL, 3, 1, 0) \ | |
13184 | OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0) | |
4c4b4cd2 PH |
13185 | |
13186 | static void | |
554794dc SDJ |
13187 | ada_operator_length (const struct expression *exp, int pc, int *oplenp, |
13188 | int *argsp) | |
4c4b4cd2 PH |
13189 | { |
13190 | switch (exp->elts[pc - 1].opcode) | |
13191 | { | |
76a01679 | 13192 | default: |
4c4b4cd2 PH |
13193 | operator_length_standard (exp, pc, oplenp, argsp); |
13194 | break; | |
13195 | ||
13196 | #define OP_DEFN(op, len, args, binop) \ | |
13197 | case op: *oplenp = len; *argsp = args; break; | |
13198 | ADA_OPERATORS; | |
13199 | #undef OP_DEFN | |
52ce6436 PH |
13200 | |
13201 | case OP_AGGREGATE: | |
13202 | *oplenp = 3; | |
13203 | *argsp = longest_to_int (exp->elts[pc - 2].longconst); | |
13204 | break; | |
13205 | ||
13206 | case OP_CHOICES: | |
13207 | *oplenp = 3; | |
13208 | *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1; | |
13209 | break; | |
4c4b4cd2 PH |
13210 | } |
13211 | } | |
13212 | ||
c0201579 JK |
13213 | /* Implementation of the exp_descriptor method operator_check. */ |
13214 | ||
13215 | static int | |
13216 | ada_operator_check (struct expression *exp, int pos, | |
13217 | int (*objfile_func) (struct objfile *objfile, void *data), | |
13218 | void *data) | |
13219 | { | |
13220 | const union exp_element *const elts = exp->elts; | |
13221 | struct type *type = NULL; | |
13222 | ||
13223 | switch (elts[pos].opcode) | |
13224 | { | |
13225 | case UNOP_IN_RANGE: | |
13226 | case UNOP_QUAL: | |
13227 | type = elts[pos + 1].type; | |
13228 | break; | |
13229 | ||
13230 | default: | |
13231 | return operator_check_standard (exp, pos, objfile_func, data); | |
13232 | } | |
13233 | ||
13234 | /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */ | |
13235 | ||
13236 | if (type && TYPE_OBJFILE (type) | |
13237 | && (*objfile_func) (TYPE_OBJFILE (type), data)) | |
13238 | return 1; | |
13239 | ||
13240 | return 0; | |
13241 | } | |
13242 | ||
4c4b4cd2 PH |
13243 | /* As for operator_length, but assumes PC is pointing at the first |
13244 | element of the operator, and gives meaningful results only for the | |
52ce6436 | 13245 | Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */ |
4c4b4cd2 PH |
13246 | |
13247 | static void | |
76a01679 | 13248 | ada_forward_operator_length (struct expression *exp, int pc, |
dda83cd7 | 13249 | int *oplenp, int *argsp) |
4c4b4cd2 | 13250 | { |
76a01679 | 13251 | switch (exp->elts[pc].opcode) |
4c4b4cd2 PH |
13252 | { |
13253 | default: | |
13254 | *oplenp = *argsp = 0; | |
13255 | break; | |
52ce6436 | 13256 | |
4c4b4cd2 PH |
13257 | #define OP_DEFN(op, len, args, binop) \ |
13258 | case op: *oplenp = len; *argsp = args; break; | |
13259 | ADA_OPERATORS; | |
13260 | #undef OP_DEFN | |
52ce6436 PH |
13261 | |
13262 | case OP_AGGREGATE: | |
13263 | *oplenp = 3; | |
13264 | *argsp = longest_to_int (exp->elts[pc + 1].longconst); | |
13265 | break; | |
13266 | ||
13267 | case OP_CHOICES: | |
13268 | *oplenp = 3; | |
13269 | *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1; | |
13270 | break; | |
13271 | ||
13272 | case OP_STRING: | |
13273 | case OP_NAME: | |
13274 | { | |
13275 | int len = longest_to_int (exp->elts[pc + 1].longconst); | |
5b4ee69b | 13276 | |
52ce6436 PH |
13277 | *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1); |
13278 | *argsp = 0; | |
13279 | break; | |
13280 | } | |
4c4b4cd2 PH |
13281 | } |
13282 | } | |
13283 | ||
13284 | static int | |
13285 | ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt) | |
13286 | { | |
13287 | enum exp_opcode op = exp->elts[elt].opcode; | |
13288 | int oplen, nargs; | |
13289 | int pc = elt; | |
13290 | int i; | |
76a01679 | 13291 | |
4c4b4cd2 PH |
13292 | ada_forward_operator_length (exp, elt, &oplen, &nargs); |
13293 | ||
76a01679 | 13294 | switch (op) |
4c4b4cd2 | 13295 | { |
76a01679 | 13296 | /* Ada attributes ('Foo). */ |
4c4b4cd2 PH |
13297 | case OP_ATR_FIRST: |
13298 | case OP_ATR_LAST: | |
13299 | case OP_ATR_LENGTH: | |
13300 | case OP_ATR_IMAGE: | |
13301 | case OP_ATR_MAX: | |
13302 | case OP_ATR_MIN: | |
13303 | case OP_ATR_MODULUS: | |
13304 | case OP_ATR_POS: | |
13305 | case OP_ATR_SIZE: | |
13306 | case OP_ATR_TAG: | |
13307 | case OP_ATR_VAL: | |
13308 | break; | |
13309 | ||
13310 | case UNOP_IN_RANGE: | |
13311 | case UNOP_QUAL: | |
323e0a4a AC |
13312 | /* XXX: gdb_sprint_host_address, type_sprint */ |
13313 | fprintf_filtered (stream, _("Type @")); | |
4c4b4cd2 PH |
13314 | gdb_print_host_address (exp->elts[pc + 1].type, stream); |
13315 | fprintf_filtered (stream, " ("); | |
13316 | type_print (exp->elts[pc + 1].type, NULL, stream, 0); | |
13317 | fprintf_filtered (stream, ")"); | |
13318 | break; | |
13319 | case BINOP_IN_BOUNDS: | |
52ce6436 PH |
13320 | fprintf_filtered (stream, " (%d)", |
13321 | longest_to_int (exp->elts[pc + 2].longconst)); | |
4c4b4cd2 PH |
13322 | break; |
13323 | case TERNOP_IN_RANGE: | |
13324 | break; | |
13325 | ||
52ce6436 PH |
13326 | case OP_AGGREGATE: |
13327 | case OP_OTHERS: | |
13328 | case OP_DISCRETE_RANGE: | |
13329 | case OP_POSITIONAL: | |
13330 | case OP_CHOICES: | |
13331 | break; | |
13332 | ||
13333 | case OP_NAME: | |
13334 | case OP_STRING: | |
13335 | { | |
13336 | char *name = &exp->elts[elt + 2].string; | |
13337 | int len = longest_to_int (exp->elts[elt + 1].longconst); | |
5b4ee69b | 13338 | |
52ce6436 PH |
13339 | fprintf_filtered (stream, "Text: `%.*s'", len, name); |
13340 | break; | |
13341 | } | |
13342 | ||
4c4b4cd2 PH |
13343 | default: |
13344 | return dump_subexp_body_standard (exp, stream, elt); | |
13345 | } | |
13346 | ||
13347 | elt += oplen; | |
13348 | for (i = 0; i < nargs; i += 1) | |
13349 | elt = dump_subexp (exp, stream, elt); | |
13350 | ||
13351 | return elt; | |
13352 | } | |
13353 | ||
13354 | /* The Ada extension of print_subexp (q.v.). */ | |
13355 | ||
76a01679 JB |
13356 | static void |
13357 | ada_print_subexp (struct expression *exp, int *pos, | |
dda83cd7 | 13358 | struct ui_file *stream, enum precedence prec) |
4c4b4cd2 | 13359 | { |
52ce6436 | 13360 | int oplen, nargs, i; |
4c4b4cd2 PH |
13361 | int pc = *pos; |
13362 | enum exp_opcode op = exp->elts[pc].opcode; | |
13363 | ||
13364 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
13365 | ||
52ce6436 | 13366 | *pos += oplen; |
4c4b4cd2 PH |
13367 | switch (op) |
13368 | { | |
13369 | default: | |
52ce6436 | 13370 | *pos -= oplen; |
4c4b4cd2 PH |
13371 | print_subexp_standard (exp, pos, stream, prec); |
13372 | return; | |
13373 | ||
13374 | case OP_VAR_VALUE: | |
987012b8 | 13375 | fputs_filtered (exp->elts[pc + 2].symbol->natural_name (), stream); |
4c4b4cd2 PH |
13376 | return; |
13377 | ||
13378 | case BINOP_IN_BOUNDS: | |
323e0a4a | 13379 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13380 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13381 | fputs_filtered (" in ", stream); |
4c4b4cd2 | 13382 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13383 | fputs_filtered ("'range", stream); |
4c4b4cd2 | 13384 | if (exp->elts[pc + 1].longconst > 1) |
dda83cd7 SM |
13385 | fprintf_filtered (stream, "(%ld)", |
13386 | (long) exp->elts[pc + 1].longconst); | |
4c4b4cd2 PH |
13387 | return; |
13388 | ||
13389 | case TERNOP_IN_RANGE: | |
4c4b4cd2 | 13390 | if (prec >= PREC_EQUAL) |
dda83cd7 | 13391 | fputs_filtered ("(", stream); |
323e0a4a | 13392 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13393 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13394 | fputs_filtered (" in ", stream); |
4c4b4cd2 PH |
13395 | print_subexp (exp, pos, stream, PREC_EQUAL); |
13396 | fputs_filtered (" .. ", stream); | |
13397 | print_subexp (exp, pos, stream, PREC_EQUAL); | |
13398 | if (prec >= PREC_EQUAL) | |
dda83cd7 | 13399 | fputs_filtered (")", stream); |
76a01679 | 13400 | return; |
4c4b4cd2 PH |
13401 | |
13402 | case OP_ATR_FIRST: | |
13403 | case OP_ATR_LAST: | |
13404 | case OP_ATR_LENGTH: | |
13405 | case OP_ATR_IMAGE: | |
13406 | case OP_ATR_MAX: | |
13407 | case OP_ATR_MIN: | |
13408 | case OP_ATR_MODULUS: | |
13409 | case OP_ATR_POS: | |
13410 | case OP_ATR_SIZE: | |
13411 | case OP_ATR_TAG: | |
13412 | case OP_ATR_VAL: | |
4c4b4cd2 | 13413 | if (exp->elts[*pos].opcode == OP_TYPE) |
dda83cd7 SM |
13414 | { |
13415 | if (exp->elts[*pos + 1].type->code () != TYPE_CODE_VOID) | |
13416 | LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0, | |
79d43c61 | 13417 | &type_print_raw_options); |
dda83cd7 SM |
13418 | *pos += 3; |
13419 | } | |
4c4b4cd2 | 13420 | else |
dda83cd7 | 13421 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
4c4b4cd2 PH |
13422 | fprintf_filtered (stream, "'%s", ada_attribute_name (op)); |
13423 | if (nargs > 1) | |
dda83cd7 SM |
13424 | { |
13425 | int tem; | |
13426 | ||
13427 | for (tem = 1; tem < nargs; tem += 1) | |
13428 | { | |
13429 | fputs_filtered ((tem == 1) ? " (" : ", ", stream); | |
13430 | print_subexp (exp, pos, stream, PREC_ABOVE_COMMA); | |
13431 | } | |
13432 | fputs_filtered (")", stream); | |
13433 | } | |
4c4b4cd2 | 13434 | return; |
14f9c5c9 | 13435 | |
4c4b4cd2 | 13436 | case UNOP_QUAL: |
4c4b4cd2 PH |
13437 | type_print (exp->elts[pc + 1].type, "", stream, 0); |
13438 | fputs_filtered ("'(", stream); | |
13439 | print_subexp (exp, pos, stream, PREC_PREFIX); | |
13440 | fputs_filtered (")", stream); | |
13441 | return; | |
14f9c5c9 | 13442 | |
4c4b4cd2 | 13443 | case UNOP_IN_RANGE: |
323e0a4a | 13444 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13445 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13446 | fputs_filtered (" in ", stream); |
79d43c61 TT |
13447 | LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0, |
13448 | &type_print_raw_options); | |
4c4b4cd2 | 13449 | return; |
52ce6436 PH |
13450 | |
13451 | case OP_DISCRETE_RANGE: | |
13452 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13453 | fputs_filtered ("..", stream); | |
13454 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13455 | return; | |
13456 | ||
13457 | case OP_OTHERS: | |
13458 | fputs_filtered ("others => ", stream); | |
13459 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13460 | return; | |
13461 | ||
13462 | case OP_CHOICES: | |
13463 | for (i = 0; i < nargs-1; i += 1) | |
13464 | { | |
13465 | if (i > 0) | |
13466 | fputs_filtered ("|", stream); | |
13467 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13468 | } | |
13469 | fputs_filtered (" => ", stream); | |
13470 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13471 | return; | |
13472 | ||
13473 | case OP_POSITIONAL: | |
13474 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13475 | return; | |
13476 | ||
13477 | case OP_AGGREGATE: | |
13478 | fputs_filtered ("(", stream); | |
13479 | for (i = 0; i < nargs; i += 1) | |
13480 | { | |
13481 | if (i > 0) | |
13482 | fputs_filtered (", ", stream); | |
13483 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13484 | } | |
13485 | fputs_filtered (")", stream); | |
13486 | return; | |
4c4b4cd2 PH |
13487 | } |
13488 | } | |
14f9c5c9 AS |
13489 | |
13490 | /* Table mapping opcodes into strings for printing operators | |
13491 | and precedences of the operators. */ | |
13492 | ||
d2e4a39e AS |
13493 | static const struct op_print ada_op_print_tab[] = { |
13494 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
13495 | {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
13496 | {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
13497 | {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, | |
13498 | {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, | |
13499 | {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, | |
13500 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
13501 | {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
13502 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
13503 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
13504 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
13505 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
13506 | {">>", BINOP_RSH, PREC_SHIFT, 0}, | |
13507 | {"<<", BINOP_LSH, PREC_SHIFT, 0}, | |
13508 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
13509 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
13510 | {"&", BINOP_CONCAT, PREC_ADD, 0}, | |
13511 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
13512 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
13513 | {"rem", BINOP_REM, PREC_MUL, 0}, | |
13514 | {"mod", BINOP_MOD, PREC_MUL, 0}, | |
13515 | {"**", BINOP_EXP, PREC_REPEAT, 0}, | |
13516 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
13517 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
13518 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
13519 | {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
13520 | {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0}, | |
13521 | {"abs ", UNOP_ABS, PREC_PREFIX, 0}, | |
4c4b4cd2 PH |
13522 | {".all", UNOP_IND, PREC_SUFFIX, 1}, |
13523 | {"'access", UNOP_ADDR, PREC_SUFFIX, 1}, | |
13524 | {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1}, | |
f486487f | 13525 | {NULL, OP_NULL, PREC_SUFFIX, 0} |
14f9c5c9 | 13526 | }; |
6c038f32 PH |
13527 | \f |
13528 | /* Language vector */ | |
13529 | ||
6c038f32 PH |
13530 | static const struct exp_descriptor ada_exp_descriptor = { |
13531 | ada_print_subexp, | |
13532 | ada_operator_length, | |
c0201579 | 13533 | ada_operator_check, |
6c038f32 PH |
13534 | ada_dump_subexp_body, |
13535 | ada_evaluate_subexp | |
13536 | }; | |
13537 | ||
b5ec771e PA |
13538 | /* symbol_name_matcher_ftype adapter for wild_match. */ |
13539 | ||
13540 | static bool | |
13541 | do_wild_match (const char *symbol_search_name, | |
13542 | const lookup_name_info &lookup_name, | |
a207cff2 | 13543 | completion_match_result *comp_match_res) |
b5ec771e PA |
13544 | { |
13545 | return wild_match (symbol_search_name, ada_lookup_name (lookup_name)); | |
13546 | } | |
13547 | ||
13548 | /* symbol_name_matcher_ftype adapter for full_match. */ | |
13549 | ||
13550 | static bool | |
13551 | do_full_match (const char *symbol_search_name, | |
13552 | const lookup_name_info &lookup_name, | |
a207cff2 | 13553 | completion_match_result *comp_match_res) |
b5ec771e | 13554 | { |
86b44259 TT |
13555 | if (startswith (symbol_search_name, "_ada_")) |
13556 | symbol_search_name += 5; | |
13557 | ||
13558 | const char *lname = lookup_name.ada ().lookup_name ().c_str (); | |
13559 | int uscore_count = 0; | |
13560 | while (*lname != '\0') | |
13561 | { | |
13562 | if (*symbol_search_name != *lname) | |
13563 | { | |
13564 | if (*symbol_search_name == 'B' && uscore_count == 2 | |
13565 | && symbol_search_name[1] == '_') | |
13566 | { | |
13567 | symbol_search_name += 2; | |
13568 | while (isdigit (*symbol_search_name)) | |
13569 | ++symbol_search_name; | |
13570 | if (symbol_search_name[0] == '_' | |
13571 | && symbol_search_name[1] == '_') | |
13572 | { | |
13573 | symbol_search_name += 2; | |
13574 | continue; | |
13575 | } | |
13576 | } | |
13577 | return false; | |
13578 | } | |
13579 | ||
13580 | if (*symbol_search_name == '_') | |
13581 | ++uscore_count; | |
13582 | else | |
13583 | uscore_count = 0; | |
13584 | ||
13585 | ++symbol_search_name; | |
13586 | ++lname; | |
13587 | } | |
13588 | ||
13589 | return is_name_suffix (symbol_search_name); | |
b5ec771e PA |
13590 | } |
13591 | ||
a2cd4f14 JB |
13592 | /* symbol_name_matcher_ftype for exact (verbatim) matches. */ |
13593 | ||
13594 | static bool | |
13595 | do_exact_match (const char *symbol_search_name, | |
13596 | const lookup_name_info &lookup_name, | |
13597 | completion_match_result *comp_match_res) | |
13598 | { | |
13599 | return strcmp (symbol_search_name, ada_lookup_name (lookup_name)) == 0; | |
13600 | } | |
13601 | ||
b5ec771e PA |
13602 | /* Build the Ada lookup name for LOOKUP_NAME. */ |
13603 | ||
13604 | ada_lookup_name_info::ada_lookup_name_info (const lookup_name_info &lookup_name) | |
13605 | { | |
e0802d59 | 13606 | gdb::string_view user_name = lookup_name.name (); |
b5ec771e PA |
13607 | |
13608 | if (user_name[0] == '<') | |
13609 | { | |
13610 | if (user_name.back () == '>') | |
e0802d59 | 13611 | m_encoded_name |
5ac58899 | 13612 | = gdb::to_string (user_name.substr (1, user_name.size () - 2)); |
b5ec771e | 13613 | else |
e0802d59 | 13614 | m_encoded_name |
5ac58899 | 13615 | = gdb::to_string (user_name.substr (1, user_name.size () - 1)); |
b5ec771e PA |
13616 | m_encoded_p = true; |
13617 | m_verbatim_p = true; | |
13618 | m_wild_match_p = false; | |
13619 | m_standard_p = false; | |
13620 | } | |
13621 | else | |
13622 | { | |
13623 | m_verbatim_p = false; | |
13624 | ||
e0802d59 | 13625 | m_encoded_p = user_name.find ("__") != gdb::string_view::npos; |
b5ec771e PA |
13626 | |
13627 | if (!m_encoded_p) | |
13628 | { | |
e0802d59 | 13629 | const char *folded = ada_fold_name (user_name); |
5c4258f4 TT |
13630 | m_encoded_name = ada_encode_1 (folded, false); |
13631 | if (m_encoded_name.empty ()) | |
5ac58899 | 13632 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13633 | } |
13634 | else | |
5ac58899 | 13635 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13636 | |
13637 | /* Handle the 'package Standard' special case. See description | |
13638 | of m_standard_p. */ | |
13639 | if (startswith (m_encoded_name.c_str (), "standard__")) | |
13640 | { | |
13641 | m_encoded_name = m_encoded_name.substr (sizeof ("standard__") - 1); | |
13642 | m_standard_p = true; | |
13643 | } | |
13644 | else | |
13645 | m_standard_p = false; | |
74ccd7f5 | 13646 | |
b5ec771e PA |
13647 | /* If the name contains a ".", then the user is entering a fully |
13648 | qualified entity name, and the match must not be done in wild | |
13649 | mode. Similarly, if the user wants to complete what looks | |
13650 | like an encoded name, the match must not be done in wild | |
13651 | mode. Also, in the standard__ special case always do | |
13652 | non-wild matching. */ | |
13653 | m_wild_match_p | |
13654 | = (lookup_name.match_type () != symbol_name_match_type::FULL | |
13655 | && !m_encoded_p | |
13656 | && !m_standard_p | |
13657 | && user_name.find ('.') == std::string::npos); | |
13658 | } | |
13659 | } | |
13660 | ||
13661 | /* symbol_name_matcher_ftype method for Ada. This only handles | |
13662 | completion mode. */ | |
13663 | ||
13664 | static bool | |
13665 | ada_symbol_name_matches (const char *symbol_search_name, | |
13666 | const lookup_name_info &lookup_name, | |
a207cff2 | 13667 | completion_match_result *comp_match_res) |
74ccd7f5 | 13668 | { |
b5ec771e PA |
13669 | return lookup_name.ada ().matches (symbol_search_name, |
13670 | lookup_name.match_type (), | |
a207cff2 | 13671 | comp_match_res); |
b5ec771e PA |
13672 | } |
13673 | ||
de63c46b PA |
13674 | /* A name matcher that matches the symbol name exactly, with |
13675 | strcmp. */ | |
13676 | ||
13677 | static bool | |
13678 | literal_symbol_name_matcher (const char *symbol_search_name, | |
13679 | const lookup_name_info &lookup_name, | |
13680 | completion_match_result *comp_match_res) | |
13681 | { | |
e0802d59 | 13682 | gdb::string_view name_view = lookup_name.name (); |
de63c46b | 13683 | |
e0802d59 TT |
13684 | if (lookup_name.completion_mode () |
13685 | ? (strncmp (symbol_search_name, name_view.data (), | |
13686 | name_view.size ()) == 0) | |
13687 | : symbol_search_name == name_view) | |
de63c46b PA |
13688 | { |
13689 | if (comp_match_res != NULL) | |
13690 | comp_match_res->set_match (symbol_search_name); | |
13691 | return true; | |
13692 | } | |
13693 | else | |
13694 | return false; | |
13695 | } | |
13696 | ||
c9debfb9 | 13697 | /* Implement the "get_symbol_name_matcher" language_defn method for |
b5ec771e PA |
13698 | Ada. */ |
13699 | ||
13700 | static symbol_name_matcher_ftype * | |
13701 | ada_get_symbol_name_matcher (const lookup_name_info &lookup_name) | |
13702 | { | |
de63c46b PA |
13703 | if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME) |
13704 | return literal_symbol_name_matcher; | |
13705 | ||
b5ec771e PA |
13706 | if (lookup_name.completion_mode ()) |
13707 | return ada_symbol_name_matches; | |
74ccd7f5 | 13708 | else |
b5ec771e PA |
13709 | { |
13710 | if (lookup_name.ada ().wild_match_p ()) | |
13711 | return do_wild_match; | |
a2cd4f14 JB |
13712 | else if (lookup_name.ada ().verbatim_p ()) |
13713 | return do_exact_match; | |
b5ec771e PA |
13714 | else |
13715 | return do_full_match; | |
13716 | } | |
74ccd7f5 JB |
13717 | } |
13718 | ||
0874fd07 AB |
13719 | /* Class representing the Ada language. */ |
13720 | ||
13721 | class ada_language : public language_defn | |
13722 | { | |
13723 | public: | |
13724 | ada_language () | |
0e25e767 | 13725 | : language_defn (language_ada) |
0874fd07 | 13726 | { /* Nothing. */ } |
5bd40f2a | 13727 | |
6f7664a9 AB |
13728 | /* See language.h. */ |
13729 | ||
13730 | const char *name () const override | |
13731 | { return "ada"; } | |
13732 | ||
13733 | /* See language.h. */ | |
13734 | ||
13735 | const char *natural_name () const override | |
13736 | { return "Ada"; } | |
13737 | ||
e171d6f1 AB |
13738 | /* See language.h. */ |
13739 | ||
13740 | const std::vector<const char *> &filename_extensions () const override | |
13741 | { | |
13742 | static const std::vector<const char *> extensions | |
13743 | = { ".adb", ".ads", ".a", ".ada", ".dg" }; | |
13744 | return extensions; | |
13745 | } | |
13746 | ||
5bd40f2a AB |
13747 | /* Print an array element index using the Ada syntax. */ |
13748 | ||
13749 | void print_array_index (struct type *index_type, | |
13750 | LONGEST index, | |
13751 | struct ui_file *stream, | |
13752 | const value_print_options *options) const override | |
13753 | { | |
13754 | struct value *index_value = val_atr (index_type, index); | |
13755 | ||
00c696a6 | 13756 | value_print (index_value, stream, options); |
5bd40f2a AB |
13757 | fprintf_filtered (stream, " => "); |
13758 | } | |
15e5fd35 AB |
13759 | |
13760 | /* Implement the "read_var_value" language_defn method for Ada. */ | |
13761 | ||
13762 | struct value *read_var_value (struct symbol *var, | |
13763 | const struct block *var_block, | |
13764 | struct frame_info *frame) const override | |
13765 | { | |
13766 | /* The only case where default_read_var_value is not sufficient | |
13767 | is when VAR is a renaming... */ | |
13768 | if (frame != nullptr) | |
13769 | { | |
13770 | const struct block *frame_block = get_frame_block (frame, NULL); | |
13771 | if (frame_block != nullptr && ada_is_renaming_symbol (var)) | |
13772 | return ada_read_renaming_var_value (var, frame_block); | |
13773 | } | |
13774 | ||
13775 | /* This is a typical case where we expect the default_read_var_value | |
13776 | function to work. */ | |
13777 | return language_defn::read_var_value (var, var_block, frame); | |
13778 | } | |
1fb314aa AB |
13779 | |
13780 | /* See language.h. */ | |
13781 | void language_arch_info (struct gdbarch *gdbarch, | |
13782 | struct language_arch_info *lai) const override | |
13783 | { | |
13784 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
13785 | ||
7bea47f0 AB |
13786 | /* Helper function to allow shorter lines below. */ |
13787 | auto add = [&] (struct type *t) | |
13788 | { | |
13789 | lai->add_primitive_type (t); | |
13790 | }; | |
13791 | ||
13792 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13793 | 0, "integer")); | |
13794 | add (arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
13795 | 0, "long_integer")); | |
13796 | add (arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), | |
13797 | 0, "short_integer")); | |
13798 | struct type *char_type = arch_character_type (gdbarch, TARGET_CHAR_BIT, | |
13799 | 0, "character"); | |
13800 | lai->set_string_char_type (char_type); | |
13801 | add (char_type); | |
13802 | add (arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), | |
13803 | "float", gdbarch_float_format (gdbarch))); | |
13804 | add (arch_float_type (gdbarch, gdbarch_double_bit (gdbarch), | |
13805 | "long_float", gdbarch_double_format (gdbarch))); | |
13806 | add (arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch), | |
13807 | 0, "long_long_integer")); | |
13808 | add (arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch), | |
13809 | "long_long_float", | |
13810 | gdbarch_long_double_format (gdbarch))); | |
13811 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13812 | 0, "natural")); | |
13813 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13814 | 0, "positive")); | |
13815 | add (builtin->builtin_void); | |
13816 | ||
13817 | struct type *system_addr_ptr | |
1fb314aa AB |
13818 | = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, |
13819 | "void")); | |
7bea47f0 AB |
13820 | system_addr_ptr->set_name ("system__address"); |
13821 | add (system_addr_ptr); | |
1fb314aa AB |
13822 | |
13823 | /* Create the equivalent of the System.Storage_Elements.Storage_Offset | |
13824 | type. This is a signed integral type whose size is the same as | |
13825 | the size of addresses. */ | |
7bea47f0 AB |
13826 | unsigned int addr_length = TYPE_LENGTH (system_addr_ptr); |
13827 | add (arch_integer_type (gdbarch, addr_length * HOST_CHAR_BIT, 0, | |
13828 | "storage_offset")); | |
1fb314aa | 13829 | |
7bea47f0 | 13830 | lai->set_bool_type (builtin->builtin_bool); |
1fb314aa | 13831 | } |
4009ee92 AB |
13832 | |
13833 | /* See language.h. */ | |
13834 | ||
13835 | bool iterate_over_symbols | |
13836 | (const struct block *block, const lookup_name_info &name, | |
13837 | domain_enum domain, | |
13838 | gdb::function_view<symbol_found_callback_ftype> callback) const override | |
13839 | { | |
13840 | std::vector<struct block_symbol> results; | |
13841 | ||
13842 | ada_lookup_symbol_list_worker (name, block, domain, &results, 0); | |
13843 | for (block_symbol &sym : results) | |
13844 | { | |
13845 | if (!callback (&sym)) | |
13846 | return false; | |
13847 | } | |
13848 | ||
13849 | return true; | |
13850 | } | |
6f827019 AB |
13851 | |
13852 | /* See language.h. */ | |
13853 | bool sniff_from_mangled_name (const char *mangled, | |
13854 | char **out) const override | |
13855 | { | |
13856 | std::string demangled = ada_decode (mangled); | |
13857 | ||
13858 | *out = NULL; | |
13859 | ||
13860 | if (demangled != mangled && demangled[0] != '<') | |
13861 | { | |
13862 | /* Set the gsymbol language to Ada, but still return 0. | |
13863 | Two reasons for that: | |
13864 | ||
13865 | 1. For Ada, we prefer computing the symbol's decoded name | |
13866 | on the fly rather than pre-compute it, in order to save | |
13867 | memory (Ada projects are typically very large). | |
13868 | ||
13869 | 2. There are some areas in the definition of the GNAT | |
13870 | encoding where, with a bit of bad luck, we might be able | |
13871 | to decode a non-Ada symbol, generating an incorrect | |
13872 | demangled name (Eg: names ending with "TB" for instance | |
13873 | are identified as task bodies and so stripped from | |
13874 | the decoded name returned). | |
13875 | ||
13876 | Returning true, here, but not setting *DEMANGLED, helps us get | |
13877 | a little bit of the best of both worlds. Because we're last, | |
13878 | we should not affect any of the other languages that were | |
13879 | able to demangle the symbol before us; we get to correctly | |
13880 | tag Ada symbols as such; and even if we incorrectly tagged a | |
13881 | non-Ada symbol, which should be rare, any routing through the | |
13882 | Ada language should be transparent (Ada tries to behave much | |
13883 | like C/C++ with non-Ada symbols). */ | |
13884 | return true; | |
13885 | } | |
13886 | ||
13887 | return false; | |
13888 | } | |
fbfb0a46 AB |
13889 | |
13890 | /* See language.h. */ | |
13891 | ||
5399db93 | 13892 | char *demangle_symbol (const char *mangled, int options) const override |
0a50df5d AB |
13893 | { |
13894 | return ada_la_decode (mangled, options); | |
13895 | } | |
13896 | ||
13897 | /* See language.h. */ | |
13898 | ||
fbfb0a46 AB |
13899 | void print_type (struct type *type, const char *varstring, |
13900 | struct ui_file *stream, int show, int level, | |
13901 | const struct type_print_options *flags) const override | |
13902 | { | |
13903 | ada_print_type (type, varstring, stream, show, level, flags); | |
13904 | } | |
c9debfb9 | 13905 | |
53fc67f8 AB |
13906 | /* See language.h. */ |
13907 | ||
13908 | const char *word_break_characters (void) const override | |
13909 | { | |
13910 | return ada_completer_word_break_characters; | |
13911 | } | |
13912 | ||
7e56227d AB |
13913 | /* See language.h. */ |
13914 | ||
13915 | void collect_symbol_completion_matches (completion_tracker &tracker, | |
13916 | complete_symbol_mode mode, | |
13917 | symbol_name_match_type name_match_type, | |
13918 | const char *text, const char *word, | |
13919 | enum type_code code) const override | |
13920 | { | |
13921 | struct symbol *sym; | |
13922 | const struct block *b, *surrounding_static_block = 0; | |
13923 | struct block_iterator iter; | |
13924 | ||
13925 | gdb_assert (code == TYPE_CODE_UNDEF); | |
13926 | ||
13927 | lookup_name_info lookup_name (text, name_match_type, true); | |
13928 | ||
13929 | /* First, look at the partial symtab symbols. */ | |
13930 | expand_symtabs_matching (NULL, | |
13931 | lookup_name, | |
13932 | NULL, | |
13933 | NULL, | |
13934 | ALL_DOMAIN); | |
13935 | ||
13936 | /* At this point scan through the misc symbol vectors and add each | |
13937 | symbol you find to the list. Eventually we want to ignore | |
13938 | anything that isn't a text symbol (everything else will be | |
13939 | handled by the psymtab code above). */ | |
13940 | ||
13941 | for (objfile *objfile : current_program_space->objfiles ()) | |
13942 | { | |
13943 | for (minimal_symbol *msymbol : objfile->msymbols ()) | |
13944 | { | |
13945 | QUIT; | |
13946 | ||
13947 | if (completion_skip_symbol (mode, msymbol)) | |
13948 | continue; | |
13949 | ||
13950 | language symbol_language = msymbol->language (); | |
13951 | ||
13952 | /* Ada minimal symbols won't have their language set to Ada. If | |
13953 | we let completion_list_add_name compare using the | |
13954 | default/C-like matcher, then when completing e.g., symbols in a | |
13955 | package named "pck", we'd match internal Ada symbols like | |
13956 | "pckS", which are invalid in an Ada expression, unless you wrap | |
13957 | them in '<' '>' to request a verbatim match. | |
13958 | ||
13959 | Unfortunately, some Ada encoded names successfully demangle as | |
13960 | C++ symbols (using an old mangling scheme), such as "name__2Xn" | |
13961 | -> "Xn::name(void)" and thus some Ada minimal symbols end up | |
13962 | with the wrong language set. Paper over that issue here. */ | |
13963 | if (symbol_language == language_auto | |
13964 | || symbol_language == language_cplus) | |
13965 | symbol_language = language_ada; | |
13966 | ||
13967 | completion_list_add_name (tracker, | |
13968 | symbol_language, | |
13969 | msymbol->linkage_name (), | |
13970 | lookup_name, text, word); | |
13971 | } | |
13972 | } | |
13973 | ||
13974 | /* Search upwards from currently selected frame (so that we can | |
13975 | complete on local vars. */ | |
13976 | ||
13977 | for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b)) | |
13978 | { | |
13979 | if (!BLOCK_SUPERBLOCK (b)) | |
13980 | surrounding_static_block = b; /* For elmin of dups */ | |
13981 | ||
13982 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
13983 | { | |
13984 | if (completion_skip_symbol (mode, sym)) | |
13985 | continue; | |
13986 | ||
13987 | completion_list_add_name (tracker, | |
13988 | sym->language (), | |
13989 | sym->linkage_name (), | |
13990 | lookup_name, text, word); | |
13991 | } | |
13992 | } | |
13993 | ||
13994 | /* Go through the symtabs and check the externs and statics for | |
13995 | symbols which match. */ | |
13996 | ||
13997 | for (objfile *objfile : current_program_space->objfiles ()) | |
13998 | { | |
13999 | for (compunit_symtab *s : objfile->compunits ()) | |
14000 | { | |
14001 | QUIT; | |
14002 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), GLOBAL_BLOCK); | |
14003 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
14004 | { | |
14005 | if (completion_skip_symbol (mode, sym)) | |
14006 | continue; | |
14007 | ||
14008 | completion_list_add_name (tracker, | |
14009 | sym->language (), | |
14010 | sym->linkage_name (), | |
14011 | lookup_name, text, word); | |
14012 | } | |
14013 | } | |
14014 | } | |
14015 | ||
14016 | for (objfile *objfile : current_program_space->objfiles ()) | |
14017 | { | |
14018 | for (compunit_symtab *s : objfile->compunits ()) | |
14019 | { | |
14020 | QUIT; | |
14021 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), STATIC_BLOCK); | |
14022 | /* Don't do this block twice. */ | |
14023 | if (b == surrounding_static_block) | |
14024 | continue; | |
14025 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
14026 | { | |
14027 | if (completion_skip_symbol (mode, sym)) | |
14028 | continue; | |
14029 | ||
14030 | completion_list_add_name (tracker, | |
14031 | sym->language (), | |
14032 | sym->linkage_name (), | |
14033 | lookup_name, text, word); | |
14034 | } | |
14035 | } | |
14036 | } | |
14037 | } | |
14038 | ||
f16a9f57 AB |
14039 | /* See language.h. */ |
14040 | ||
14041 | gdb::unique_xmalloc_ptr<char> watch_location_expression | |
14042 | (struct type *type, CORE_ADDR addr) const override | |
14043 | { | |
14044 | type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type))); | |
14045 | std::string name = type_to_string (type); | |
14046 | return gdb::unique_xmalloc_ptr<char> | |
14047 | (xstrprintf ("{%s} %s", name.c_str (), core_addr_to_string (addr))); | |
14048 | } | |
14049 | ||
a1d1fa3e AB |
14050 | /* See language.h. */ |
14051 | ||
14052 | void value_print (struct value *val, struct ui_file *stream, | |
14053 | const struct value_print_options *options) const override | |
14054 | { | |
14055 | return ada_value_print (val, stream, options); | |
14056 | } | |
14057 | ||
ebe2334e AB |
14058 | /* See language.h. */ |
14059 | ||
14060 | void value_print_inner | |
14061 | (struct value *val, struct ui_file *stream, int recurse, | |
14062 | const struct value_print_options *options) const override | |
14063 | { | |
14064 | return ada_value_print_inner (val, stream, recurse, options); | |
14065 | } | |
14066 | ||
a78a19b1 AB |
14067 | /* See language.h. */ |
14068 | ||
14069 | struct block_symbol lookup_symbol_nonlocal | |
14070 | (const char *name, const struct block *block, | |
14071 | const domain_enum domain) const override | |
14072 | { | |
14073 | struct block_symbol sym; | |
14074 | ||
14075 | sym = ada_lookup_symbol (name, block_static_block (block), domain); | |
14076 | if (sym.symbol != NULL) | |
14077 | return sym; | |
14078 | ||
14079 | /* If we haven't found a match at this point, try the primitive | |
14080 | types. In other languages, this search is performed before | |
14081 | searching for global symbols in order to short-circuit that | |
14082 | global-symbol search if it happens that the name corresponds | |
14083 | to a primitive type. But we cannot do the same in Ada, because | |
14084 | it is perfectly legitimate for a program to declare a type which | |
14085 | has the same name as a standard type. If looking up a type in | |
14086 | that situation, we have traditionally ignored the primitive type | |
14087 | in favor of user-defined types. This is why, unlike most other | |
14088 | languages, we search the primitive types this late and only after | |
14089 | having searched the global symbols without success. */ | |
14090 | ||
14091 | if (domain == VAR_DOMAIN) | |
14092 | { | |
14093 | struct gdbarch *gdbarch; | |
14094 | ||
14095 | if (block == NULL) | |
14096 | gdbarch = target_gdbarch (); | |
14097 | else | |
14098 | gdbarch = block_gdbarch (block); | |
14099 | sym.symbol | |
14100 | = language_lookup_primitive_type_as_symbol (this, gdbarch, name); | |
14101 | if (sym.symbol != NULL) | |
14102 | return sym; | |
14103 | } | |
14104 | ||
14105 | return {}; | |
14106 | } | |
14107 | ||
87afa652 AB |
14108 | /* See language.h. */ |
14109 | ||
14110 | int parser (struct parser_state *ps) const override | |
14111 | { | |
14112 | warnings_issued = 0; | |
14113 | return ada_parse (ps); | |
14114 | } | |
14115 | ||
1bf9c363 AB |
14116 | /* See language.h. |
14117 | ||
14118 | Same as evaluate_type (*EXP), but resolves ambiguous symbol references | |
14119 | (marked by OP_VAR_VALUE nodes in which the symbol has an undefined | |
14120 | namespace) and converts operators that are user-defined into | |
14121 | appropriate function calls. If CONTEXT_TYPE is non-null, it provides | |
14122 | a preferred result type [at the moment, only type void has any | |
14123 | effect---causing procedures to be preferred over functions in calls]. | |
14124 | A null CONTEXT_TYPE indicates that a non-void return type is | |
14125 | preferred. May change (expand) *EXP. */ | |
14126 | ||
c5c41205 TT |
14127 | void post_parser (expression_up *expp, struct parser_state *ps) |
14128 | const override | |
1bf9c363 AB |
14129 | { |
14130 | struct type *context_type = NULL; | |
14131 | int pc = 0; | |
14132 | ||
c5c41205 | 14133 | if (ps->void_context_p) |
1bf9c363 AB |
14134 | context_type = builtin_type ((*expp)->gdbarch)->builtin_void; |
14135 | ||
c5c41205 TT |
14136 | resolve_subexp (expp, &pc, 1, context_type, ps->parse_completion, |
14137 | ps->block_tracker); | |
1bf9c363 AB |
14138 | } |
14139 | ||
ec8cec5b AB |
14140 | /* See language.h. */ |
14141 | ||
14142 | void emitchar (int ch, struct type *chtype, | |
14143 | struct ui_file *stream, int quoter) const override | |
14144 | { | |
14145 | ada_emit_char (ch, chtype, stream, quoter, 1); | |
14146 | } | |
14147 | ||
52b50f2c AB |
14148 | /* See language.h. */ |
14149 | ||
14150 | void printchar (int ch, struct type *chtype, | |
14151 | struct ui_file *stream) const override | |
14152 | { | |
14153 | ada_printchar (ch, chtype, stream); | |
14154 | } | |
14155 | ||
d711ee67 AB |
14156 | /* See language.h. */ |
14157 | ||
14158 | void printstr (struct ui_file *stream, struct type *elttype, | |
14159 | const gdb_byte *string, unsigned int length, | |
14160 | const char *encoding, int force_ellipses, | |
14161 | const struct value_print_options *options) const override | |
14162 | { | |
14163 | ada_printstr (stream, elttype, string, length, encoding, | |
14164 | force_ellipses, options); | |
14165 | } | |
14166 | ||
4ffc13fb AB |
14167 | /* See language.h. */ |
14168 | ||
14169 | void print_typedef (struct type *type, struct symbol *new_symbol, | |
14170 | struct ui_file *stream) const override | |
14171 | { | |
14172 | ada_print_typedef (type, new_symbol, stream); | |
14173 | } | |
14174 | ||
39e7ecca AB |
14175 | /* See language.h. */ |
14176 | ||
14177 | bool is_string_type_p (struct type *type) const override | |
14178 | { | |
14179 | return ada_is_string_type (type); | |
14180 | } | |
14181 | ||
22e3f3ed AB |
14182 | /* See language.h. */ |
14183 | ||
14184 | const char *struct_too_deep_ellipsis () const override | |
14185 | { return "(...)"; } | |
39e7ecca | 14186 | |
67bd3fd5 AB |
14187 | /* See language.h. */ |
14188 | ||
14189 | bool c_style_arrays_p () const override | |
14190 | { return false; } | |
14191 | ||
d3355e4d AB |
14192 | /* See language.h. */ |
14193 | ||
14194 | bool store_sym_names_in_linkage_form_p () const override | |
14195 | { return true; } | |
14196 | ||
b63a3f3f AB |
14197 | /* See language.h. */ |
14198 | ||
14199 | const struct lang_varobj_ops *varobj_ops () const override | |
14200 | { return &ada_varobj_ops; } | |
14201 | ||
5aba6ebe AB |
14202 | /* See language.h. */ |
14203 | ||
14204 | const struct exp_descriptor *expression_ops () const override | |
14205 | { return &ada_exp_descriptor; } | |
14206 | ||
b7c6e27d AB |
14207 | /* See language.h. */ |
14208 | ||
14209 | const struct op_print *opcode_print_table () const override | |
14210 | { return ada_op_print_tab; } | |
14211 | ||
c9debfb9 AB |
14212 | protected: |
14213 | /* See language.h. */ | |
14214 | ||
14215 | symbol_name_matcher_ftype *get_symbol_name_matcher_inner | |
14216 | (const lookup_name_info &lookup_name) const override | |
14217 | { | |
14218 | return ada_get_symbol_name_matcher (lookup_name); | |
14219 | } | |
0874fd07 AB |
14220 | }; |
14221 | ||
14222 | /* Single instance of the Ada language class. */ | |
14223 | ||
14224 | static ada_language ada_language_defn; | |
14225 | ||
5bf03f13 JB |
14226 | /* Command-list for the "set/show ada" prefix command. */ |
14227 | static struct cmd_list_element *set_ada_list; | |
14228 | static struct cmd_list_element *show_ada_list; | |
14229 | ||
2060206e PA |
14230 | static void |
14231 | initialize_ada_catchpoint_ops (void) | |
14232 | { | |
14233 | struct breakpoint_ops *ops; | |
14234 | ||
14235 | initialize_breakpoint_ops (); | |
14236 | ||
14237 | ops = &catch_exception_breakpoint_ops; | |
14238 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14239 | ops->allocate_location = allocate_location_exception; |
14240 | ops->re_set = re_set_exception; | |
14241 | ops->check_status = check_status_exception; | |
14242 | ops->print_it = print_it_exception; | |
14243 | ops->print_one = print_one_exception; | |
14244 | ops->print_mention = print_mention_exception; | |
14245 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14246 | |
14247 | ops = &catch_exception_unhandled_breakpoint_ops; | |
14248 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14249 | ops->allocate_location = allocate_location_exception; |
14250 | ops->re_set = re_set_exception; | |
14251 | ops->check_status = check_status_exception; | |
14252 | ops->print_it = print_it_exception; | |
14253 | ops->print_one = print_one_exception; | |
14254 | ops->print_mention = print_mention_exception; | |
14255 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14256 | |
14257 | ops = &catch_assert_breakpoint_ops; | |
14258 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14259 | ops->allocate_location = allocate_location_exception; |
14260 | ops->re_set = re_set_exception; | |
14261 | ops->check_status = check_status_exception; | |
14262 | ops->print_it = print_it_exception; | |
14263 | ops->print_one = print_one_exception; | |
14264 | ops->print_mention = print_mention_exception; | |
14265 | ops->print_recreate = print_recreate_exception; | |
9f757bf7 XR |
14266 | |
14267 | ops = &catch_handlers_breakpoint_ops; | |
14268 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14269 | ops->allocate_location = allocate_location_exception; |
14270 | ops->re_set = re_set_exception; | |
14271 | ops->check_status = check_status_exception; | |
14272 | ops->print_it = print_it_exception; | |
14273 | ops->print_one = print_one_exception; | |
14274 | ops->print_mention = print_mention_exception; | |
14275 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14276 | } |
14277 | ||
3d9434b5 JB |
14278 | /* This module's 'new_objfile' observer. */ |
14279 | ||
14280 | static void | |
14281 | ada_new_objfile_observer (struct objfile *objfile) | |
14282 | { | |
14283 | ada_clear_symbol_cache (); | |
14284 | } | |
14285 | ||
14286 | /* This module's 'free_objfile' observer. */ | |
14287 | ||
14288 | static void | |
14289 | ada_free_objfile_observer (struct objfile *objfile) | |
14290 | { | |
14291 | ada_clear_symbol_cache (); | |
14292 | } | |
14293 | ||
6c265988 | 14294 | void _initialize_ada_language (); |
d2e4a39e | 14295 | void |
6c265988 | 14296 | _initialize_ada_language () |
14f9c5c9 | 14297 | { |
2060206e PA |
14298 | initialize_ada_catchpoint_ops (); |
14299 | ||
0743fc83 TT |
14300 | add_basic_prefix_cmd ("ada", no_class, |
14301 | _("Prefix command for changing Ada-specific settings."), | |
14302 | &set_ada_list, "set ada ", 0, &setlist); | |
5bf03f13 | 14303 | |
0743fc83 TT |
14304 | add_show_prefix_cmd ("ada", no_class, |
14305 | _("Generic command for showing Ada-specific settings."), | |
14306 | &show_ada_list, "show ada ", 0, &showlist); | |
5bf03f13 JB |
14307 | |
14308 | add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure, | |
dda83cd7 | 14309 | &trust_pad_over_xvs, _("\ |
590042fc PW |
14310 | Enable or disable an optimization trusting PAD types over XVS types."), _("\ |
14311 | Show whether an optimization trusting PAD types over XVS types is activated."), | |
dda83cd7 | 14312 | _("\ |
5bf03f13 JB |
14313 | This is related to the encoding used by the GNAT compiler. The debugger\n\ |
14314 | should normally trust the contents of PAD types, but certain older versions\n\ | |
14315 | of GNAT have a bug that sometimes causes the information in the PAD type\n\ | |
14316 | to be incorrect. Turning this setting \"off\" allows the debugger to\n\ | |
14317 | work around this bug. It is always safe to turn this option \"off\", but\n\ | |
14318 | this incurs a slight performance penalty, so it is recommended to NOT change\n\ | |
14319 | this option to \"off\" unless necessary."), | |
dda83cd7 | 14320 | NULL, NULL, &set_ada_list, &show_ada_list); |
5bf03f13 | 14321 | |
d72413e6 PMR |
14322 | add_setshow_boolean_cmd ("print-signatures", class_vars, |
14323 | &print_signatures, _("\ | |
14324 | Enable or disable the output of formal and return types for functions in the \ | |
590042fc | 14325 | overloads selection menu."), _("\ |
d72413e6 | 14326 | Show whether the output of formal and return types for functions in the \ |
590042fc | 14327 | overloads selection menu is activated."), |
d72413e6 PMR |
14328 | NULL, NULL, NULL, &set_ada_list, &show_ada_list); |
14329 | ||
9ac4176b PA |
14330 | add_catch_command ("exception", _("\ |
14331 | Catch Ada exceptions, when raised.\n\ | |
9bf7038b | 14332 | Usage: catch exception [ARG] [if CONDITION]\n\ |
60a90376 JB |
14333 | Without any argument, stop when any Ada exception is raised.\n\ |
14334 | If ARG is \"unhandled\" (without the quotes), only stop when the exception\n\ | |
14335 | being raised does not have a handler (and will therefore lead to the task's\n\ | |
14336 | termination).\n\ | |
14337 | Otherwise, the catchpoint only stops when the name of the exception being\n\ | |
9bf7038b TT |
14338 | raised is the same as ARG.\n\ |
14339 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14340 | exception should cause a stop."), | |
9ac4176b | 14341 | catch_ada_exception_command, |
71bed2db | 14342 | catch_ada_completer, |
9ac4176b PA |
14343 | CATCH_PERMANENT, |
14344 | CATCH_TEMPORARY); | |
9f757bf7 XR |
14345 | |
14346 | add_catch_command ("handlers", _("\ | |
14347 | Catch Ada exceptions, when handled.\n\ | |
9bf7038b TT |
14348 | Usage: catch handlers [ARG] [if CONDITION]\n\ |
14349 | Without any argument, stop when any Ada exception is handled.\n\ | |
14350 | With an argument, catch only exceptions with the given name.\n\ | |
14351 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14352 | exception should cause a stop."), | |
9f757bf7 | 14353 | catch_ada_handlers_command, |
dda83cd7 | 14354 | catch_ada_completer, |
9f757bf7 XR |
14355 | CATCH_PERMANENT, |
14356 | CATCH_TEMPORARY); | |
9ac4176b PA |
14357 | add_catch_command ("assert", _("\ |
14358 | Catch failed Ada assertions, when raised.\n\ | |
9bf7038b TT |
14359 | Usage: catch assert [if CONDITION]\n\ |
14360 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14361 | exception should cause a stop."), | |
9ac4176b | 14362 | catch_assert_command, |
dda83cd7 | 14363 | NULL, |
9ac4176b PA |
14364 | CATCH_PERMANENT, |
14365 | CATCH_TEMPORARY); | |
14366 | ||
6c038f32 | 14367 | varsize_limit = 65536; |
3fcded8f JB |
14368 | add_setshow_uinteger_cmd ("varsize-limit", class_support, |
14369 | &varsize_limit, _("\ | |
14370 | Set the maximum number of bytes allowed in a variable-size object."), _("\ | |
14371 | Show the maximum number of bytes allowed in a variable-size object."), _("\ | |
14372 | Attempts to access an object whose size is not a compile-time constant\n\ | |
14373 | and exceeds this limit will cause an error."), | |
14374 | NULL, NULL, &setlist, &showlist); | |
6c038f32 | 14375 | |
778865d3 JB |
14376 | add_info ("exceptions", info_exceptions_command, |
14377 | _("\ | |
14378 | List all Ada exception names.\n\ | |
9bf7038b | 14379 | Usage: info exceptions [REGEXP]\n\ |
778865d3 JB |
14380 | If a regular expression is passed as an argument, only those matching\n\ |
14381 | the regular expression are listed.")); | |
14382 | ||
0743fc83 TT |
14383 | add_basic_prefix_cmd ("ada", class_maintenance, |
14384 | _("Set Ada maintenance-related variables."), | |
14385 | &maint_set_ada_cmdlist, "maintenance set ada ", | |
14386 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
c6044dd1 | 14387 | |
0743fc83 TT |
14388 | add_show_prefix_cmd ("ada", class_maintenance, |
14389 | _("Show Ada maintenance-related variables."), | |
14390 | &maint_show_ada_cmdlist, "maintenance show ada ", | |
14391 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
c6044dd1 JB |
14392 | |
14393 | add_setshow_boolean_cmd | |
14394 | ("ignore-descriptive-types", class_maintenance, | |
14395 | &ada_ignore_descriptive_types_p, | |
14396 | _("Set whether descriptive types generated by GNAT should be ignored."), | |
14397 | _("Show whether descriptive types generated by GNAT should be ignored."), | |
14398 | _("\ | |
14399 | When enabled, the debugger will stop using the DW_AT_GNAT_descriptive_type\n\ | |
14400 | DWARF attribute."), | |
14401 | NULL, NULL, &maint_set_ada_cmdlist, &maint_show_ada_cmdlist); | |
14402 | ||
459a2e4c TT |
14403 | decoded_names_store = htab_create_alloc (256, htab_hash_string, streq_hash, |
14404 | NULL, xcalloc, xfree); | |
6b69afc4 | 14405 | |
3d9434b5 | 14406 | /* The ada-lang observers. */ |
76727919 TT |
14407 | gdb::observers::new_objfile.attach (ada_new_objfile_observer); |
14408 | gdb::observers::free_objfile.attach (ada_free_objfile_observer); | |
14409 | gdb::observers::inferior_exit.attach (ada_inferior_exit); | |
14f9c5c9 | 14410 | } |