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6e681866 | 1 | /* Ada language support routines for GDB, the GNU debugger. |
10a2c479 | 2 | |
213516ef | 3 | Copyright (C) 1992-2023 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> |
d322d6d6 | 23 | #include "gdbsupport/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" |
bf31fd38 | 38 | #include "gdbsupport/gdb_obstack.h" |
4de283e4 TT |
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" |
0f8e2034 | 52 | #include "cli/cli-decode.h" |
4de283e4 | 53 | |
40bc484c | 54 | #include "value.h" |
4de283e4 TT |
55 | #include "mi/mi-common.h" |
56 | #include "arch-utils.h" | |
57 | #include "cli/cli-utils.h" | |
268a13a5 TT |
58 | #include "gdbsupport/function-view.h" |
59 | #include "gdbsupport/byte-vector.h" | |
4de283e4 | 60 | #include <algorithm> |
03070ee9 | 61 | #include "ada-exp.h" |
315e4ebb | 62 | #include "charset.h" |
ccefe4c4 | 63 | |
4c4b4cd2 | 64 | /* Define whether or not the C operator '/' truncates towards zero for |
0963b4bd | 65 | differently signed operands (truncation direction is undefined in C). |
4c4b4cd2 PH |
66 | Copied from valarith.c. */ |
67 | ||
68 | #ifndef TRUNCATION_TOWARDS_ZERO | |
69 | #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2) | |
70 | #endif | |
71 | ||
d2e4a39e | 72 | static struct type *desc_base_type (struct type *); |
14f9c5c9 | 73 | |
d2e4a39e | 74 | static struct type *desc_bounds_type (struct type *); |
14f9c5c9 | 75 | |
d2e4a39e | 76 | static struct value *desc_bounds (struct value *); |
14f9c5c9 | 77 | |
d2e4a39e | 78 | static int fat_pntr_bounds_bitpos (struct type *); |
14f9c5c9 | 79 | |
d2e4a39e | 80 | static int fat_pntr_bounds_bitsize (struct type *); |
14f9c5c9 | 81 | |
556bdfd4 | 82 | static struct type *desc_data_target_type (struct type *); |
14f9c5c9 | 83 | |
d2e4a39e | 84 | static struct value *desc_data (struct value *); |
14f9c5c9 | 85 | |
d2e4a39e | 86 | static int fat_pntr_data_bitpos (struct type *); |
14f9c5c9 | 87 | |
d2e4a39e | 88 | static int fat_pntr_data_bitsize (struct type *); |
14f9c5c9 | 89 | |
d2e4a39e | 90 | static struct value *desc_one_bound (struct value *, int, int); |
14f9c5c9 | 91 | |
d2e4a39e | 92 | static int desc_bound_bitpos (struct type *, int, int); |
14f9c5c9 | 93 | |
d2e4a39e | 94 | static int desc_bound_bitsize (struct type *, int, int); |
14f9c5c9 | 95 | |
d2e4a39e | 96 | static struct type *desc_index_type (struct type *, int); |
14f9c5c9 | 97 | |
d2e4a39e | 98 | static int desc_arity (struct type *); |
14f9c5c9 | 99 | |
d2e4a39e | 100 | static int ada_args_match (struct symbol *, struct value **, int); |
14f9c5c9 | 101 | |
40bc484c | 102 | static struct value *make_array_descriptor (struct type *, struct value *); |
14f9c5c9 | 103 | |
d1183b06 | 104 | static void ada_add_block_symbols (std::vector<struct block_symbol> &, |
b5ec771e PA |
105 | const struct block *, |
106 | const lookup_name_info &lookup_name, | |
107 | domain_enum, struct objfile *); | |
14f9c5c9 | 108 | |
d1183b06 TT |
109 | static void ada_add_all_symbols (std::vector<struct block_symbol> &, |
110 | const struct block *, | |
b5ec771e PA |
111 | const lookup_name_info &lookup_name, |
112 | domain_enum, int, int *); | |
22cee43f | 113 | |
d1183b06 | 114 | static int is_nonfunction (const std::vector<struct block_symbol> &); |
14f9c5c9 | 115 | |
d1183b06 TT |
116 | static void add_defn_to_vec (std::vector<struct block_symbol> &, |
117 | struct symbol *, | |
dda83cd7 | 118 | const struct block *); |
14f9c5c9 | 119 | |
d2e4a39e | 120 | static int possible_user_operator_p (enum exp_opcode, struct value **); |
14f9c5c9 | 121 | |
4c4b4cd2 | 122 | static const char *ada_decoded_op_name (enum exp_opcode); |
14f9c5c9 | 123 | |
d2e4a39e | 124 | static int numeric_type_p (struct type *); |
14f9c5c9 | 125 | |
d2e4a39e | 126 | static int integer_type_p (struct type *); |
14f9c5c9 | 127 | |
d2e4a39e | 128 | static int scalar_type_p (struct type *); |
14f9c5c9 | 129 | |
d2e4a39e | 130 | static int discrete_type_p (struct type *); |
14f9c5c9 | 131 | |
a121b7c1 | 132 | static struct type *ada_lookup_struct_elt_type (struct type *, const char *, |
dda83cd7 | 133 | int, int); |
4c4b4cd2 | 134 | |
b4ba55a1 | 135 | static struct type *ada_find_parallel_type_with_name (struct type *, |
dda83cd7 | 136 | const char *); |
b4ba55a1 | 137 | |
d2e4a39e | 138 | static int is_dynamic_field (struct type *, int); |
14f9c5c9 | 139 | |
10a2c479 | 140 | static struct type *to_fixed_variant_branch_type (struct type *, |
fc1a4b47 | 141 | const gdb_byte *, |
dda83cd7 | 142 | CORE_ADDR, struct value *); |
4c4b4cd2 PH |
143 | |
144 | static struct type *to_fixed_array_type (struct type *, struct value *, int); | |
14f9c5c9 | 145 | |
28c85d6c | 146 | static struct type *to_fixed_range_type (struct type *, struct value *); |
14f9c5c9 | 147 | |
d2e4a39e | 148 | static struct type *to_static_fixed_type (struct type *); |
f192137b | 149 | static struct type *static_unwrap_type (struct type *type); |
14f9c5c9 | 150 | |
d2e4a39e | 151 | static struct value *unwrap_value (struct value *); |
14f9c5c9 | 152 | |
ad82864c | 153 | static struct type *constrained_packed_array_type (struct type *, long *); |
14f9c5c9 | 154 | |
ad82864c | 155 | static struct type *decode_constrained_packed_array_type (struct type *); |
14f9c5c9 | 156 | |
ad82864c JB |
157 | static long decode_packed_array_bitsize (struct type *); |
158 | ||
159 | static struct value *decode_constrained_packed_array (struct value *); | |
160 | ||
ad82864c | 161 | static int ada_is_unconstrained_packed_array_type (struct type *); |
14f9c5c9 | 162 | |
d2e4a39e | 163 | static struct value *value_subscript_packed (struct value *, int, |
dda83cd7 | 164 | struct value **); |
14f9c5c9 | 165 | |
4c4b4cd2 | 166 | static struct value *coerce_unspec_val_to_type (struct value *, |
dda83cd7 | 167 | struct type *); |
14f9c5c9 | 168 | |
d2e4a39e | 169 | static int lesseq_defined_than (struct symbol *, struct symbol *); |
14f9c5c9 | 170 | |
d2e4a39e | 171 | static int equiv_types (struct type *, struct type *); |
14f9c5c9 | 172 | |
d2e4a39e | 173 | static int is_name_suffix (const char *); |
14f9c5c9 | 174 | |
59c8a30b | 175 | static int advance_wild_match (const char **, const char *, char); |
73589123 | 176 | |
b5ec771e | 177 | static bool wild_match (const char *name, const char *patn); |
14f9c5c9 | 178 | |
d2e4a39e | 179 | static struct value *ada_coerce_ref (struct value *); |
14f9c5c9 | 180 | |
4c4b4cd2 PH |
181 | static LONGEST pos_atr (struct value *); |
182 | ||
53a47a3e TT |
183 | static struct value *val_atr (struct type *, LONGEST); |
184 | ||
4c4b4cd2 | 185 | static struct symbol *standard_lookup (const char *, const struct block *, |
dda83cd7 | 186 | domain_enum); |
14f9c5c9 | 187 | |
108d56a4 | 188 | static struct value *ada_search_struct_field (const char *, struct value *, int, |
dda83cd7 | 189 | struct type *); |
4c4b4cd2 | 190 | |
0d5cff50 | 191 | static int find_struct_field (const char *, struct type *, int, |
dda83cd7 | 192 | struct type **, int *, int *, int *, int *); |
4c4b4cd2 | 193 | |
d1183b06 | 194 | static int ada_resolve_function (std::vector<struct block_symbol> &, |
dda83cd7 | 195 | struct value **, int, const char *, |
7056f312 | 196 | struct type *, bool); |
4c4b4cd2 | 197 | |
4c4b4cd2 PH |
198 | static int ada_is_direct_array_type (struct type *); |
199 | ||
52ce6436 PH |
200 | static struct value *ada_index_struct_field (int, struct value *, int, |
201 | struct type *); | |
202 | ||
cf608cc4 | 203 | static void add_component_interval (LONGEST, LONGEST, std::vector<LONGEST> &); |
52ce6436 PH |
204 | |
205 | ||
852dff6c | 206 | static struct type *ada_find_any_type (const char *name); |
b5ec771e PA |
207 | |
208 | static symbol_name_matcher_ftype *ada_get_symbol_name_matcher | |
209 | (const lookup_name_info &lookup_name); | |
210 | ||
4c4b4cd2 PH |
211 | \f |
212 | ||
315e4ebb TT |
213 | /* The character set used for source files. */ |
214 | static const char *ada_source_charset; | |
215 | ||
216 | /* The string "UTF-8". This is here so we can check for the UTF-8 | |
217 | charset using == rather than strcmp. */ | |
218 | static const char ada_utf8[] = "UTF-8"; | |
219 | ||
220 | /* Each entry in the UTF-32 case-folding table is of this form. */ | |
221 | struct utf8_entry | |
222 | { | |
223 | /* The start and end, inclusive, of this range of codepoints. */ | |
224 | uint32_t start, end; | |
225 | /* The delta to apply to get the upper-case form. 0 if this is | |
226 | already upper-case. */ | |
227 | int upper_delta; | |
228 | /* The delta to apply to get the lower-case form. 0 if this is | |
229 | already lower-case. */ | |
230 | int lower_delta; | |
231 | ||
232 | bool operator< (uint32_t val) const | |
233 | { | |
234 | return end < val; | |
235 | } | |
236 | }; | |
237 | ||
238 | static const utf8_entry ada_case_fold[] = | |
239 | { | |
240 | #include "ada-casefold.h" | |
241 | }; | |
242 | ||
243 | \f | |
244 | ||
ee01b665 JB |
245 | /* The result of a symbol lookup to be stored in our symbol cache. */ |
246 | ||
247 | struct cache_entry | |
248 | { | |
249 | /* The name used to perform the lookup. */ | |
250 | const char *name; | |
251 | /* The namespace used during the lookup. */ | |
fe978cb0 | 252 | domain_enum domain; |
ee01b665 JB |
253 | /* The symbol returned by the lookup, or NULL if no matching symbol |
254 | was found. */ | |
255 | struct symbol *sym; | |
256 | /* The block where the symbol was found, or NULL if no matching | |
257 | symbol was found. */ | |
258 | const struct block *block; | |
259 | /* A pointer to the next entry with the same hash. */ | |
260 | struct cache_entry *next; | |
261 | }; | |
262 | ||
263 | /* The Ada symbol cache, used to store the result of Ada-mode symbol | |
264 | lookups in the course of executing the user's commands. | |
265 | ||
266 | The cache is implemented using a simple, fixed-sized hash. | |
267 | The size is fixed on the grounds that there are not likely to be | |
268 | all that many symbols looked up during any given session, regardless | |
269 | of the size of the symbol table. If we decide to go to a resizable | |
270 | table, let's just use the stuff from libiberty instead. */ | |
271 | ||
272 | #define HASH_SIZE 1009 | |
273 | ||
274 | struct ada_symbol_cache | |
275 | { | |
276 | /* An obstack used to store the entries in our cache. */ | |
bdcccc56 | 277 | struct auto_obstack cache_space; |
ee01b665 JB |
278 | |
279 | /* The root of the hash table used to implement our symbol cache. */ | |
bdcccc56 | 280 | struct cache_entry *root[HASH_SIZE] {}; |
ee01b665 JB |
281 | }; |
282 | ||
67cb5b2d | 283 | static const char ada_completer_word_break_characters[] = |
4c4b4cd2 PH |
284 | #ifdef VMS |
285 | " \t\n!@#%^&*()+=|~`}{[]\";:?/,-"; | |
286 | #else | |
14f9c5c9 | 287 | " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-"; |
4c4b4cd2 | 288 | #endif |
14f9c5c9 | 289 | |
4c4b4cd2 | 290 | /* The name of the symbol to use to get the name of the main subprogram. */ |
76a01679 | 291 | static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[] |
4c4b4cd2 | 292 | = "__gnat_ada_main_program_name"; |
14f9c5c9 | 293 | |
4c4b4cd2 PH |
294 | /* Limit on the number of warnings to raise per expression evaluation. */ |
295 | static int warning_limit = 2; | |
296 | ||
297 | /* Number of warning messages issued; reset to 0 by cleanups after | |
298 | expression evaluation. */ | |
299 | static int warnings_issued = 0; | |
300 | ||
27087b7f | 301 | static const char * const known_runtime_file_name_patterns[] = { |
4c4b4cd2 PH |
302 | ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL |
303 | }; | |
304 | ||
27087b7f | 305 | static const char * const known_auxiliary_function_name_patterns[] = { |
4c4b4cd2 PH |
306 | ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL |
307 | }; | |
308 | ||
c6044dd1 JB |
309 | /* Maintenance-related settings for this module. */ |
310 | ||
311 | static struct cmd_list_element *maint_set_ada_cmdlist; | |
312 | static struct cmd_list_element *maint_show_ada_cmdlist; | |
313 | ||
c6044dd1 JB |
314 | /* The "maintenance ada set/show ignore-descriptive-type" value. */ |
315 | ||
491144b5 | 316 | static bool ada_ignore_descriptive_types_p = false; |
c6044dd1 | 317 | |
e802dbe0 JB |
318 | /* Inferior-specific data. */ |
319 | ||
320 | /* Per-inferior data for this module. */ | |
321 | ||
322 | struct ada_inferior_data | |
323 | { | |
324 | /* The ada__tags__type_specific_data type, which is used when decoding | |
325 | tagged types. With older versions of GNAT, this type was directly | |
326 | accessible through a component ("tsd") in the object tag. But this | |
327 | is no longer the case, so we cache it for each inferior. */ | |
f37b313d | 328 | struct type *tsd_type = nullptr; |
3eecfa55 JB |
329 | |
330 | /* The exception_support_info data. This data is used to determine | |
331 | how to implement support for Ada exception catchpoints in a given | |
332 | inferior. */ | |
f37b313d | 333 | const struct exception_support_info *exception_info = nullptr; |
e802dbe0 JB |
334 | }; |
335 | ||
336 | /* Our key to this module's inferior data. */ | |
08b8a139 | 337 | static const registry<inferior>::key<ada_inferior_data> ada_inferior_data; |
e802dbe0 JB |
338 | |
339 | /* Return our inferior data for the given inferior (INF). | |
340 | ||
341 | This function always returns a valid pointer to an allocated | |
342 | ada_inferior_data structure. If INF's inferior data has not | |
343 | been previously set, this functions creates a new one with all | |
344 | fields set to zero, sets INF's inferior to it, and then returns | |
345 | a pointer to that newly allocated ada_inferior_data. */ | |
346 | ||
347 | static struct ada_inferior_data * | |
348 | get_ada_inferior_data (struct inferior *inf) | |
349 | { | |
350 | struct ada_inferior_data *data; | |
351 | ||
f37b313d | 352 | data = ada_inferior_data.get (inf); |
e802dbe0 | 353 | if (data == NULL) |
f37b313d | 354 | data = ada_inferior_data.emplace (inf); |
e802dbe0 JB |
355 | |
356 | return data; | |
357 | } | |
358 | ||
359 | /* Perform all necessary cleanups regarding our module's inferior data | |
360 | that is required after the inferior INF just exited. */ | |
361 | ||
362 | static void | |
363 | ada_inferior_exit (struct inferior *inf) | |
364 | { | |
f37b313d | 365 | ada_inferior_data.clear (inf); |
e802dbe0 JB |
366 | } |
367 | ||
ee01b665 JB |
368 | |
369 | /* program-space-specific data. */ | |
370 | ||
371 | /* This module's per-program-space data. */ | |
372 | struct ada_pspace_data | |
373 | { | |
374 | /* The Ada symbol cache. */ | |
bdcccc56 | 375 | std::unique_ptr<ada_symbol_cache> sym_cache; |
ee01b665 JB |
376 | }; |
377 | ||
378 | /* Key to our per-program-space data. */ | |
08b8a139 TT |
379 | static const registry<program_space>::key<ada_pspace_data> |
380 | ada_pspace_data_handle; | |
ee01b665 JB |
381 | |
382 | /* Return this module's data for the given program space (PSPACE). | |
383 | If not is found, add a zero'ed one now. | |
384 | ||
385 | This function always returns a valid object. */ | |
386 | ||
387 | static struct ada_pspace_data * | |
388 | get_ada_pspace_data (struct program_space *pspace) | |
389 | { | |
390 | struct ada_pspace_data *data; | |
391 | ||
f37b313d | 392 | data = ada_pspace_data_handle.get (pspace); |
ee01b665 | 393 | if (data == NULL) |
f37b313d | 394 | data = ada_pspace_data_handle.emplace (pspace); |
ee01b665 JB |
395 | |
396 | return data; | |
397 | } | |
398 | ||
dda83cd7 | 399 | /* Utilities */ |
4c4b4cd2 | 400 | |
720d1a40 | 401 | /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after |
eed9788b | 402 | all typedef layers have been peeled. Otherwise, return TYPE. |
720d1a40 JB |
403 | |
404 | Normally, we really expect a typedef type to only have 1 typedef layer. | |
405 | In other words, we really expect the target type of a typedef type to be | |
406 | a non-typedef type. This is particularly true for Ada units, because | |
407 | the language does not have a typedef vs not-typedef distinction. | |
408 | In that respect, the Ada compiler has been trying to eliminate as many | |
409 | typedef definitions in the debugging information, since they generally | |
410 | do not bring any extra information (we still use typedef under certain | |
411 | circumstances related mostly to the GNAT encoding). | |
412 | ||
413 | Unfortunately, we have seen situations where the debugging information | |
414 | generated by the compiler leads to such multiple typedef layers. For | |
415 | instance, consider the following example with stabs: | |
416 | ||
417 | .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...] | |
418 | .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0 | |
419 | ||
420 | This is an error in the debugging information which causes type | |
421 | pck__float_array___XUP to be defined twice, and the second time, | |
422 | it is defined as a typedef of a typedef. | |
423 | ||
424 | This is on the fringe of legality as far as debugging information is | |
425 | concerned, and certainly unexpected. But it is easy to handle these | |
426 | situations correctly, so we can afford to be lenient in this case. */ | |
427 | ||
428 | static struct type * | |
429 | ada_typedef_target_type (struct type *type) | |
430 | { | |
78134374 | 431 | while (type->code () == TYPE_CODE_TYPEDEF) |
27710edb | 432 | type = type->target_type (); |
720d1a40 JB |
433 | return type; |
434 | } | |
435 | ||
41d27058 JB |
436 | /* Given DECODED_NAME a string holding a symbol name in its |
437 | decoded form (ie using the Ada dotted notation), returns | |
438 | its unqualified name. */ | |
439 | ||
440 | static const char * | |
441 | ada_unqualified_name (const char *decoded_name) | |
442 | { | |
2b0f535a JB |
443 | const char *result; |
444 | ||
445 | /* If the decoded name starts with '<', it means that the encoded | |
446 | name does not follow standard naming conventions, and thus that | |
447 | it is not your typical Ada symbol name. Trying to unqualify it | |
448 | is therefore pointless and possibly erroneous. */ | |
449 | if (decoded_name[0] == '<') | |
450 | return decoded_name; | |
451 | ||
452 | result = strrchr (decoded_name, '.'); | |
41d27058 JB |
453 | if (result != NULL) |
454 | result++; /* Skip the dot... */ | |
455 | else | |
456 | result = decoded_name; | |
457 | ||
458 | return result; | |
459 | } | |
460 | ||
39e7af3e | 461 | /* Return a string starting with '<', followed by STR, and '>'. */ |
41d27058 | 462 | |
39e7af3e | 463 | static std::string |
41d27058 JB |
464 | add_angle_brackets (const char *str) |
465 | { | |
39e7af3e | 466 | return string_printf ("<%s>", str); |
41d27058 | 467 | } |
96d887e8 | 468 | |
14f9c5c9 | 469 | /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing |
4c4b4cd2 | 470 | suffix of FIELD_NAME beginning "___". */ |
14f9c5c9 AS |
471 | |
472 | static int | |
ebf56fd3 | 473 | field_name_match (const char *field_name, const char *target) |
14f9c5c9 AS |
474 | { |
475 | int len = strlen (target); | |
5b4ee69b | 476 | |
d2e4a39e | 477 | return |
4c4b4cd2 PH |
478 | (strncmp (field_name, target, len) == 0 |
479 | && (field_name[len] == '\0' | |
dda83cd7 SM |
480 | || (startswith (field_name + len, "___") |
481 | && strcmp (field_name + strlen (field_name) - 6, | |
482 | "___XVN") != 0))); | |
14f9c5c9 AS |
483 | } |
484 | ||
485 | ||
872c8b51 JB |
486 | /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to |
487 | a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME, | |
488 | and return its index. This function also handles fields whose name | |
489 | have ___ suffixes because the compiler sometimes alters their name | |
490 | by adding such a suffix to represent fields with certain constraints. | |
491 | If the field could not be found, return a negative number if | |
492 | MAYBE_MISSING is set. Otherwise raise an error. */ | |
4c4b4cd2 PH |
493 | |
494 | int | |
495 | ada_get_field_index (const struct type *type, const char *field_name, | |
dda83cd7 | 496 | int maybe_missing) |
4c4b4cd2 PH |
497 | { |
498 | int fieldno; | |
872c8b51 JB |
499 | struct type *struct_type = check_typedef ((struct type *) type); |
500 | ||
1f704f76 | 501 | for (fieldno = 0; fieldno < struct_type->num_fields (); fieldno++) |
33d16dd9 | 502 | if (field_name_match (struct_type->field (fieldno).name (), field_name)) |
4c4b4cd2 PH |
503 | return fieldno; |
504 | ||
505 | if (!maybe_missing) | |
323e0a4a | 506 | error (_("Unable to find field %s in struct %s. Aborting"), |
dda83cd7 | 507 | field_name, struct_type->name ()); |
4c4b4cd2 PH |
508 | |
509 | return -1; | |
510 | } | |
511 | ||
512 | /* The length of the prefix of NAME prior to any "___" suffix. */ | |
14f9c5c9 AS |
513 | |
514 | int | |
d2e4a39e | 515 | ada_name_prefix_len (const char *name) |
14f9c5c9 AS |
516 | { |
517 | if (name == NULL) | |
518 | return 0; | |
d2e4a39e | 519 | else |
14f9c5c9 | 520 | { |
d2e4a39e | 521 | const char *p = strstr (name, "___"); |
5b4ee69b | 522 | |
14f9c5c9 | 523 | if (p == NULL) |
dda83cd7 | 524 | return strlen (name); |
14f9c5c9 | 525 | else |
dda83cd7 | 526 | return p - name; |
14f9c5c9 AS |
527 | } |
528 | } | |
529 | ||
4c4b4cd2 PH |
530 | /* Return non-zero if SUFFIX is a suffix of STR. |
531 | Return zero if STR is null. */ | |
532 | ||
14f9c5c9 | 533 | static int |
d2e4a39e | 534 | is_suffix (const char *str, const char *suffix) |
14f9c5c9 AS |
535 | { |
536 | int len1, len2; | |
5b4ee69b | 537 | |
14f9c5c9 AS |
538 | if (str == NULL) |
539 | return 0; | |
540 | len1 = strlen (str); | |
541 | len2 = strlen (suffix); | |
4c4b4cd2 | 542 | return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0); |
14f9c5c9 AS |
543 | } |
544 | ||
4c4b4cd2 PH |
545 | /* The contents of value VAL, treated as a value of type TYPE. The |
546 | result is an lval in memory if VAL is. */ | |
14f9c5c9 | 547 | |
d2e4a39e | 548 | static struct value * |
4c4b4cd2 | 549 | coerce_unspec_val_to_type (struct value *val, struct type *type) |
14f9c5c9 | 550 | { |
61ee279c | 551 | type = ada_check_typedef (type); |
d0c97917 | 552 | if (val->type () == type) |
4c4b4cd2 | 553 | return val; |
d2e4a39e | 554 | else |
14f9c5c9 | 555 | { |
4c4b4cd2 PH |
556 | struct value *result; |
557 | ||
f73e424f TT |
558 | if (value_optimized_out (val)) |
559 | result = allocate_optimized_out_value (type); | |
3ee3b270 | 560 | else if (val->lazy () |
f73e424f TT |
561 | /* Be careful not to make a lazy not_lval value. */ |
562 | || (VALUE_LVAL (val) != not_lval | |
d0c97917 | 563 | && type->length () > val->type ()->length ())) |
cbe793af | 564 | result = value::allocate_lazy (type); |
41e8491f JK |
565 | else |
566 | { | |
567 | result = allocate_value (type); | |
df86565b | 568 | value_contents_copy (result, 0, val, 0, type->length ()); |
41e8491f | 569 | } |
74bcbdf3 | 570 | set_value_component_location (result, val); |
f49d5fa2 | 571 | result->set_bitsize (val->bitsize ()); |
5011c493 | 572 | result->set_bitpos (val->bitpos ()); |
c408a94f | 573 | if (VALUE_LVAL (result) == lval_memory) |
9feb2d07 | 574 | result->set_address (val->address ()); |
14f9c5c9 AS |
575 | return result; |
576 | } | |
577 | } | |
578 | ||
fc1a4b47 AC |
579 | static const gdb_byte * |
580 | cond_offset_host (const gdb_byte *valaddr, long offset) | |
14f9c5c9 AS |
581 | { |
582 | if (valaddr == NULL) | |
583 | return NULL; | |
584 | else | |
585 | return valaddr + offset; | |
586 | } | |
587 | ||
588 | static CORE_ADDR | |
ebf56fd3 | 589 | cond_offset_target (CORE_ADDR address, long offset) |
14f9c5c9 AS |
590 | { |
591 | if (address == 0) | |
592 | return 0; | |
d2e4a39e | 593 | else |
14f9c5c9 AS |
594 | return address + offset; |
595 | } | |
596 | ||
4c4b4cd2 PH |
597 | /* Issue a warning (as for the definition of warning in utils.c, but |
598 | with exactly one argument rather than ...), unless the limit on the | |
599 | number of warnings has passed during the evaluation of the current | |
600 | expression. */ | |
a2249542 | 601 | |
77109804 AC |
602 | /* FIXME: cagney/2004-10-10: This function is mimicking the behavior |
603 | provided by "complaint". */ | |
a0b31db1 | 604 | static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2); |
77109804 | 605 | |
14f9c5c9 | 606 | static void |
a2249542 | 607 | lim_warning (const char *format, ...) |
14f9c5c9 | 608 | { |
a2249542 | 609 | va_list args; |
a2249542 | 610 | |
5b4ee69b | 611 | va_start (args, format); |
4c4b4cd2 PH |
612 | warnings_issued += 1; |
613 | if (warnings_issued <= warning_limit) | |
a2249542 MK |
614 | vwarning (format, args); |
615 | ||
616 | va_end (args); | |
4c4b4cd2 PH |
617 | } |
618 | ||
0963b4bd | 619 | /* Maximum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 620 | static LONGEST |
c3e5cd34 | 621 | max_of_size (int size) |
4c4b4cd2 | 622 | { |
76a01679 | 623 | LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2); |
5b4ee69b | 624 | |
76a01679 | 625 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
626 | } |
627 | ||
0963b4bd | 628 | /* Minimum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 629 | static LONGEST |
c3e5cd34 | 630 | min_of_size (int size) |
4c4b4cd2 | 631 | { |
c3e5cd34 | 632 | return -max_of_size (size) - 1; |
4c4b4cd2 PH |
633 | } |
634 | ||
0963b4bd | 635 | /* Maximum value of a SIZE-byte unsigned integer type. */ |
4c4b4cd2 | 636 | static ULONGEST |
c3e5cd34 | 637 | umax_of_size (int size) |
4c4b4cd2 | 638 | { |
76a01679 | 639 | ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1); |
5b4ee69b | 640 | |
76a01679 | 641 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
642 | } |
643 | ||
0963b4bd | 644 | /* Maximum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
645 | static LONGEST |
646 | max_of_type (struct type *t) | |
4c4b4cd2 | 647 | { |
c6d940a9 | 648 | if (t->is_unsigned ()) |
df86565b | 649 | return (LONGEST) umax_of_size (t->length ()); |
c3e5cd34 | 650 | else |
df86565b | 651 | return max_of_size (t->length ()); |
c3e5cd34 PH |
652 | } |
653 | ||
0963b4bd | 654 | /* Minimum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
655 | static LONGEST |
656 | min_of_type (struct type *t) | |
657 | { | |
c6d940a9 | 658 | if (t->is_unsigned ()) |
c3e5cd34 PH |
659 | return 0; |
660 | else | |
df86565b | 661 | return min_of_size (t->length ()); |
4c4b4cd2 PH |
662 | } |
663 | ||
664 | /* The largest value in the domain of TYPE, a discrete type, as an integer. */ | |
43bbcdc2 PH |
665 | LONGEST |
666 | ada_discrete_type_high_bound (struct type *type) | |
4c4b4cd2 | 667 | { |
b249d2c2 | 668 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 669 | switch (type->code ()) |
4c4b4cd2 PH |
670 | { |
671 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
672 | { |
673 | const dynamic_prop &high = type->bounds ()->high; | |
674 | ||
675 | if (high.kind () == PROP_CONST) | |
676 | return high.const_val (); | |
677 | else | |
678 | { | |
679 | gdb_assert (high.kind () == PROP_UNDEFINED); | |
680 | ||
681 | /* This happens when trying to evaluate a type's dynamic bound | |
682 | without a live target. There is nothing relevant for us to | |
683 | return here, so return 0. */ | |
684 | return 0; | |
685 | } | |
686 | } | |
4c4b4cd2 | 687 | case TYPE_CODE_ENUM: |
970db518 | 688 | return type->field (type->num_fields () - 1).loc_enumval (); |
690cc4eb PH |
689 | case TYPE_CODE_BOOL: |
690 | return 1; | |
691 | case TYPE_CODE_CHAR: | |
76a01679 | 692 | case TYPE_CODE_INT: |
690cc4eb | 693 | return max_of_type (type); |
4c4b4cd2 | 694 | default: |
43bbcdc2 | 695 | error (_("Unexpected type in ada_discrete_type_high_bound.")); |
4c4b4cd2 PH |
696 | } |
697 | } | |
698 | ||
14e75d8e | 699 | /* The smallest value in the domain of TYPE, a discrete type, as an integer. */ |
43bbcdc2 PH |
700 | LONGEST |
701 | ada_discrete_type_low_bound (struct type *type) | |
4c4b4cd2 | 702 | { |
b249d2c2 | 703 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 704 | switch (type->code ()) |
4c4b4cd2 PH |
705 | { |
706 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
707 | { |
708 | const dynamic_prop &low = type->bounds ()->low; | |
709 | ||
710 | if (low.kind () == PROP_CONST) | |
711 | return low.const_val (); | |
712 | else | |
713 | { | |
714 | gdb_assert (low.kind () == PROP_UNDEFINED); | |
715 | ||
716 | /* This happens when trying to evaluate a type's dynamic bound | |
717 | without a live target. There is nothing relevant for us to | |
718 | return here, so return 0. */ | |
719 | return 0; | |
720 | } | |
721 | } | |
4c4b4cd2 | 722 | case TYPE_CODE_ENUM: |
970db518 | 723 | return type->field (0).loc_enumval (); |
690cc4eb PH |
724 | case TYPE_CODE_BOOL: |
725 | return 0; | |
726 | case TYPE_CODE_CHAR: | |
76a01679 | 727 | case TYPE_CODE_INT: |
690cc4eb | 728 | return min_of_type (type); |
4c4b4cd2 | 729 | default: |
43bbcdc2 | 730 | error (_("Unexpected type in ada_discrete_type_low_bound.")); |
4c4b4cd2 PH |
731 | } |
732 | } | |
733 | ||
734 | /* The identity on non-range types. For range types, the underlying | |
76a01679 | 735 | non-range scalar type. */ |
4c4b4cd2 PH |
736 | |
737 | static struct type * | |
18af8284 | 738 | get_base_type (struct type *type) |
4c4b4cd2 | 739 | { |
78134374 | 740 | while (type != NULL && type->code () == TYPE_CODE_RANGE) |
4c4b4cd2 | 741 | { |
27710edb | 742 | if (type == type->target_type () || type->target_type () == NULL) |
dda83cd7 | 743 | return type; |
27710edb | 744 | type = type->target_type (); |
4c4b4cd2 PH |
745 | } |
746 | return type; | |
14f9c5c9 | 747 | } |
41246937 JB |
748 | |
749 | /* Return a decoded version of the given VALUE. This means returning | |
750 | a value whose type is obtained by applying all the GNAT-specific | |
85102364 | 751 | encodings, making the resulting type a static but standard description |
41246937 JB |
752 | of the initial type. */ |
753 | ||
754 | struct value * | |
755 | ada_get_decoded_value (struct value *value) | |
756 | { | |
d0c97917 | 757 | struct type *type = ada_check_typedef (value->type ()); |
41246937 JB |
758 | |
759 | if (ada_is_array_descriptor_type (type) | |
760 | || (ada_is_constrained_packed_array_type (type) | |
dda83cd7 | 761 | && type->code () != TYPE_CODE_PTR)) |
41246937 | 762 | { |
78134374 | 763 | if (type->code () == TYPE_CODE_TYPEDEF) /* array access type. */ |
dda83cd7 | 764 | value = ada_coerce_to_simple_array_ptr (value); |
41246937 | 765 | else |
dda83cd7 | 766 | value = ada_coerce_to_simple_array (value); |
41246937 JB |
767 | } |
768 | else | |
769 | value = ada_to_fixed_value (value); | |
770 | ||
771 | return value; | |
772 | } | |
773 | ||
774 | /* Same as ada_get_decoded_value, but with the given TYPE. | |
775 | Because there is no associated actual value for this type, | |
776 | the resulting type might be a best-effort approximation in | |
777 | the case of dynamic types. */ | |
778 | ||
779 | struct type * | |
780 | ada_get_decoded_type (struct type *type) | |
781 | { | |
782 | type = to_static_fixed_type (type); | |
783 | if (ada_is_constrained_packed_array_type (type)) | |
784 | type = ada_coerce_to_simple_array_type (type); | |
785 | return type; | |
786 | } | |
787 | ||
4c4b4cd2 | 788 | \f |
76a01679 | 789 | |
dda83cd7 | 790 | /* Language Selection */ |
14f9c5c9 AS |
791 | |
792 | /* If the main program is in Ada, return language_ada, otherwise return LANG | |
ccefe4c4 | 793 | (the main program is in Ada iif the adainit symbol is found). */ |
d2e4a39e | 794 | |
de93309a | 795 | static enum language |
ccefe4c4 | 796 | ada_update_initial_language (enum language lang) |
14f9c5c9 | 797 | { |
cafb3438 | 798 | if (lookup_minimal_symbol ("adainit", NULL, NULL).minsym != NULL) |
4c4b4cd2 | 799 | return language_ada; |
14f9c5c9 AS |
800 | |
801 | return lang; | |
802 | } | |
96d887e8 PH |
803 | |
804 | /* If the main procedure is written in Ada, then return its name. | |
805 | The result is good until the next call. Return NULL if the main | |
806 | procedure doesn't appear to be in Ada. */ | |
807 | ||
808 | char * | |
809 | ada_main_name (void) | |
810 | { | |
3b7344d5 | 811 | struct bound_minimal_symbol msym; |
e83e4e24 | 812 | static gdb::unique_xmalloc_ptr<char> main_program_name; |
6c038f32 | 813 | |
96d887e8 PH |
814 | /* For Ada, the name of the main procedure is stored in a specific |
815 | string constant, generated by the binder. Look for that symbol, | |
816 | extract its address, and then read that string. If we didn't find | |
817 | that string, then most probably the main procedure is not written | |
818 | in Ada. */ | |
819 | msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL); | |
820 | ||
3b7344d5 | 821 | if (msym.minsym != NULL) |
96d887e8 | 822 | { |
4aeddc50 | 823 | CORE_ADDR main_program_name_addr = msym.value_address (); |
96d887e8 | 824 | if (main_program_name_addr == 0) |
dda83cd7 | 825 | error (_("Invalid address for Ada main program name.")); |
96d887e8 | 826 | |
66920317 | 827 | main_program_name = target_read_string (main_program_name_addr, 1024); |
e83e4e24 | 828 | return main_program_name.get (); |
96d887e8 PH |
829 | } |
830 | ||
831 | /* The main procedure doesn't seem to be in Ada. */ | |
832 | return NULL; | |
833 | } | |
14f9c5c9 | 834 | \f |
dda83cd7 | 835 | /* Symbols */ |
d2e4a39e | 836 | |
4c4b4cd2 PH |
837 | /* Table of Ada operators and their GNAT-encoded names. Last entry is pair |
838 | of NULLs. */ | |
14f9c5c9 | 839 | |
d2e4a39e AS |
840 | const struct ada_opname_map ada_opname_table[] = { |
841 | {"Oadd", "\"+\"", BINOP_ADD}, | |
842 | {"Osubtract", "\"-\"", BINOP_SUB}, | |
843 | {"Omultiply", "\"*\"", BINOP_MUL}, | |
844 | {"Odivide", "\"/\"", BINOP_DIV}, | |
845 | {"Omod", "\"mod\"", BINOP_MOD}, | |
846 | {"Orem", "\"rem\"", BINOP_REM}, | |
847 | {"Oexpon", "\"**\"", BINOP_EXP}, | |
848 | {"Olt", "\"<\"", BINOP_LESS}, | |
849 | {"Ole", "\"<=\"", BINOP_LEQ}, | |
850 | {"Ogt", "\">\"", BINOP_GTR}, | |
851 | {"Oge", "\">=\"", BINOP_GEQ}, | |
852 | {"Oeq", "\"=\"", BINOP_EQUAL}, | |
853 | {"One", "\"/=\"", BINOP_NOTEQUAL}, | |
854 | {"Oand", "\"and\"", BINOP_BITWISE_AND}, | |
855 | {"Oor", "\"or\"", BINOP_BITWISE_IOR}, | |
856 | {"Oxor", "\"xor\"", BINOP_BITWISE_XOR}, | |
857 | {"Oconcat", "\"&\"", BINOP_CONCAT}, | |
858 | {"Oabs", "\"abs\"", UNOP_ABS}, | |
859 | {"Onot", "\"not\"", UNOP_LOGICAL_NOT}, | |
860 | {"Oadd", "\"+\"", UNOP_PLUS}, | |
861 | {"Osubtract", "\"-\"", UNOP_NEG}, | |
862 | {NULL, NULL} | |
14f9c5c9 AS |
863 | }; |
864 | ||
965bc1df TT |
865 | /* If STR is a decoded version of a compiler-provided suffix (like the |
866 | "[cold]" in "symbol[cold]"), return true. Otherwise, return | |
867 | false. */ | |
868 | ||
869 | static bool | |
870 | is_compiler_suffix (const char *str) | |
871 | { | |
872 | gdb_assert (*str == '['); | |
873 | ++str; | |
874 | while (*str != '\0' && isalpha (*str)) | |
875 | ++str; | |
876 | /* We accept a missing "]" in order to support completion. */ | |
877 | return *str == '\0' || (str[0] == ']' && str[1] == '\0'); | |
878 | } | |
879 | ||
315e4ebb TT |
880 | /* Append a non-ASCII character to RESULT. */ |
881 | static void | |
882 | append_hex_encoded (std::string &result, uint32_t one_char) | |
883 | { | |
884 | if (one_char <= 0xff) | |
885 | { | |
886 | result.append ("U"); | |
887 | result.append (phex (one_char, 1)); | |
888 | } | |
889 | else if (one_char <= 0xffff) | |
890 | { | |
891 | result.append ("W"); | |
892 | result.append (phex (one_char, 2)); | |
893 | } | |
894 | else | |
895 | { | |
896 | result.append ("WW"); | |
897 | result.append (phex (one_char, 4)); | |
898 | } | |
899 | } | |
900 | ||
901 | /* Return a string that is a copy of the data in STORAGE, with | |
902 | non-ASCII characters replaced by the appropriate hex encoding. A | |
903 | template is used because, for UTF-8, we actually want to work with | |
904 | UTF-32 codepoints. */ | |
905 | template<typename T> | |
906 | std::string | |
907 | copy_and_hex_encode (struct obstack *storage) | |
908 | { | |
909 | const T *chars = (T *) obstack_base (storage); | |
910 | int num_chars = obstack_object_size (storage) / sizeof (T); | |
911 | std::string result; | |
912 | for (int i = 0; i < num_chars; ++i) | |
913 | { | |
914 | if (chars[i] <= 0x7f) | |
915 | { | |
916 | /* The host character set has to be a superset of ASCII, as | |
917 | are all the other character sets we can use. */ | |
918 | result.push_back (chars[i]); | |
919 | } | |
920 | else | |
921 | append_hex_encoded (result, chars[i]); | |
922 | } | |
923 | return result; | |
924 | } | |
925 | ||
5c4258f4 | 926 | /* The "encoded" form of DECODED, according to GNAT conventions. If |
b5ec771e | 927 | THROW_ERRORS, throw an error if invalid operator name is found. |
5c4258f4 | 928 | Otherwise, return the empty string in that case. */ |
4c4b4cd2 | 929 | |
5c4258f4 | 930 | static std::string |
b5ec771e | 931 | ada_encode_1 (const char *decoded, bool throw_errors) |
14f9c5c9 | 932 | { |
4c4b4cd2 | 933 | if (decoded == NULL) |
5c4258f4 | 934 | return {}; |
14f9c5c9 | 935 | |
5c4258f4 | 936 | std::string encoding_buffer; |
315e4ebb | 937 | bool saw_non_ascii = false; |
5c4258f4 | 938 | for (const char *p = decoded; *p != '\0'; p += 1) |
14f9c5c9 | 939 | { |
315e4ebb TT |
940 | if ((*p & 0x80) != 0) |
941 | saw_non_ascii = true; | |
942 | ||
cdc7bb92 | 943 | if (*p == '.') |
5c4258f4 | 944 | encoding_buffer.append ("__"); |
965bc1df TT |
945 | else if (*p == '[' && is_compiler_suffix (p)) |
946 | { | |
947 | encoding_buffer = encoding_buffer + "." + (p + 1); | |
948 | if (encoding_buffer.back () == ']') | |
949 | encoding_buffer.pop_back (); | |
950 | break; | |
951 | } | |
14f9c5c9 | 952 | else if (*p == '"') |
dda83cd7 SM |
953 | { |
954 | const struct ada_opname_map *mapping; | |
955 | ||
956 | for (mapping = ada_opname_table; | |
957 | mapping->encoded != NULL | |
958 | && !startswith (p, mapping->decoded); mapping += 1) | |
959 | ; | |
960 | if (mapping->encoded == NULL) | |
b5ec771e PA |
961 | { |
962 | if (throw_errors) | |
963 | error (_("invalid Ada operator name: %s"), p); | |
964 | else | |
5c4258f4 | 965 | return {}; |
b5ec771e | 966 | } |
5c4258f4 | 967 | encoding_buffer.append (mapping->encoded); |
dda83cd7 SM |
968 | break; |
969 | } | |
d2e4a39e | 970 | else |
5c4258f4 | 971 | encoding_buffer.push_back (*p); |
14f9c5c9 AS |
972 | } |
973 | ||
315e4ebb TT |
974 | /* If a non-ASCII character is seen, we must convert it to the |
975 | appropriate hex form. As this is more expensive, we keep track | |
976 | of whether it is even necessary. */ | |
977 | if (saw_non_ascii) | |
978 | { | |
979 | auto_obstack storage; | |
980 | bool is_utf8 = ada_source_charset == ada_utf8; | |
981 | try | |
982 | { | |
983 | convert_between_encodings | |
984 | (host_charset (), | |
985 | is_utf8 ? HOST_UTF32 : ada_source_charset, | |
986 | (const gdb_byte *) encoding_buffer.c_str (), | |
987 | encoding_buffer.length (), 1, | |
988 | &storage, translit_none); | |
989 | } | |
990 | catch (const gdb_exception &) | |
991 | { | |
992 | static bool warned = false; | |
993 | ||
994 | /* Converting to UTF-32 shouldn't fail, so if it doesn't, we | |
995 | might like to know why. */ | |
996 | if (!warned) | |
997 | { | |
998 | warned = true; | |
999 | warning (_("charset conversion failure for '%s'.\n" | |
1000 | "You may have the wrong value for 'set ada source-charset'."), | |
1001 | encoding_buffer.c_str ()); | |
1002 | } | |
1003 | ||
1004 | /* We don't try to recover from errors. */ | |
1005 | return encoding_buffer; | |
1006 | } | |
1007 | ||
1008 | if (is_utf8) | |
1009 | return copy_and_hex_encode<uint32_t> (&storage); | |
1010 | return copy_and_hex_encode<gdb_byte> (&storage); | |
1011 | } | |
1012 | ||
4c4b4cd2 | 1013 | return encoding_buffer; |
14f9c5c9 AS |
1014 | } |
1015 | ||
315e4ebb TT |
1016 | /* Find the entry for C in the case-folding table. Return nullptr if |
1017 | the entry does not cover C. */ | |
1018 | static const utf8_entry * | |
1019 | find_case_fold_entry (uint32_t c) | |
b5ec771e | 1020 | { |
315e4ebb TT |
1021 | auto iter = std::lower_bound (std::begin (ada_case_fold), |
1022 | std::end (ada_case_fold), | |
1023 | c); | |
1024 | if (iter == std::end (ada_case_fold) | |
1025 | || c < iter->start | |
1026 | || c > iter->end) | |
1027 | return nullptr; | |
1028 | return &*iter; | |
b5ec771e PA |
1029 | } |
1030 | ||
14f9c5c9 | 1031 | /* Return NAME folded to lower case, or, if surrounded by single |
315e4ebb TT |
1032 | quotes, unfolded, but with the quotes stripped away. If |
1033 | THROW_ON_ERROR is true, encoding failures will throw an exception | |
1034 | rather than emitting a warning. Result good to next call. */ | |
4c4b4cd2 | 1035 | |
5f9febe0 | 1036 | static const char * |
315e4ebb | 1037 | ada_fold_name (gdb::string_view name, bool throw_on_error = false) |
14f9c5c9 | 1038 | { |
5f9febe0 | 1039 | static std::string fold_storage; |
14f9c5c9 | 1040 | |
6a780b67 | 1041 | if (!name.empty () && name[0] == '\'') |
01573d73 | 1042 | fold_storage = gdb::to_string (name.substr (1, name.size () - 2)); |
14f9c5c9 AS |
1043 | else |
1044 | { | |
315e4ebb TT |
1045 | /* Why convert to UTF-32 and implement our own case-folding, |
1046 | rather than convert to wchar_t and use the platform's | |
1047 | functions? I'm glad you asked. | |
1048 | ||
1049 | The main problem is that GNAT implements an unusual rule for | |
1050 | case folding. For ASCII letters, letters in single-byte | |
1051 | encodings (such as ISO-8859-*), and Unicode letters that fit | |
1052 | in a single byte (i.e., code point is <= 0xff), the letter is | |
1053 | folded to lower case. Other Unicode letters are folded to | |
1054 | upper case. | |
1055 | ||
1056 | This rule means that the code must be able to examine the | |
1057 | value of the character. And, some hosts do not use Unicode | |
1058 | for wchar_t, so examining the value of such characters is | |
1059 | forbidden. */ | |
1060 | auto_obstack storage; | |
1061 | try | |
1062 | { | |
1063 | convert_between_encodings | |
1064 | (host_charset (), HOST_UTF32, | |
1065 | (const gdb_byte *) name.data (), | |
1066 | name.length (), 1, | |
1067 | &storage, translit_none); | |
1068 | } | |
1069 | catch (const gdb_exception &) | |
1070 | { | |
1071 | if (throw_on_error) | |
1072 | throw; | |
1073 | ||
1074 | static bool warned = false; | |
1075 | ||
1076 | /* Converting to UTF-32 shouldn't fail, so if it doesn't, we | |
1077 | might like to know why. */ | |
1078 | if (!warned) | |
1079 | { | |
1080 | warned = true; | |
1081 | warning (_("could not convert '%s' from the host encoding (%s) to UTF-32.\n" | |
1082 | "This normally should not happen, please file a bug report."), | |
1083 | gdb::to_string (name).c_str (), host_charset ()); | |
1084 | } | |
1085 | ||
1086 | /* We don't try to recover from errors; just return the | |
1087 | original string. */ | |
1088 | fold_storage = gdb::to_string (name); | |
1089 | return fold_storage.c_str (); | |
1090 | } | |
1091 | ||
1092 | bool is_utf8 = ada_source_charset == ada_utf8; | |
1093 | uint32_t *chars = (uint32_t *) obstack_base (&storage); | |
1094 | int num_chars = obstack_object_size (&storage) / sizeof (uint32_t); | |
1095 | for (int i = 0; i < num_chars; ++i) | |
1096 | { | |
1097 | const struct utf8_entry *entry = find_case_fold_entry (chars[i]); | |
1098 | if (entry != nullptr) | |
1099 | { | |
1100 | uint32_t low = chars[i] + entry->lower_delta; | |
1101 | if (!is_utf8 || low <= 0xff) | |
1102 | chars[i] = low; | |
1103 | else | |
1104 | chars[i] = chars[i] + entry->upper_delta; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | /* Now convert back to ordinary characters. */ | |
1109 | auto_obstack reconverted; | |
1110 | try | |
1111 | { | |
1112 | convert_between_encodings (HOST_UTF32, | |
1113 | host_charset (), | |
1114 | (const gdb_byte *) chars, | |
1115 | num_chars * sizeof (uint32_t), | |
1116 | sizeof (uint32_t), | |
1117 | &reconverted, | |
1118 | translit_none); | |
1119 | obstack_1grow (&reconverted, '\0'); | |
1120 | fold_storage = std::string ((const char *) obstack_base (&reconverted)); | |
1121 | } | |
1122 | catch (const gdb_exception &) | |
1123 | { | |
1124 | if (throw_on_error) | |
1125 | throw; | |
1126 | ||
1127 | static bool warned = false; | |
1128 | ||
1129 | /* Converting back from UTF-32 shouldn't normally fail, but | |
1130 | there are some host encodings without upper/lower | |
1131 | equivalence. */ | |
1132 | if (!warned) | |
1133 | { | |
1134 | warned = true; | |
1135 | warning (_("could not convert the lower-cased variant of '%s'\n" | |
1136 | "from UTF-32 to the host encoding (%s)."), | |
1137 | gdb::to_string (name).c_str (), host_charset ()); | |
1138 | } | |
1139 | ||
1140 | /* We don't try to recover from errors; just return the | |
1141 | original string. */ | |
1142 | fold_storage = gdb::to_string (name); | |
1143 | } | |
14f9c5c9 AS |
1144 | } |
1145 | ||
5f9febe0 | 1146 | return fold_storage.c_str (); |
14f9c5c9 AS |
1147 | } |
1148 | ||
5fea9794 TT |
1149 | /* The "encoded" form of DECODED, according to GNAT conventions. If |
1150 | FOLD is true (the default), case-fold any ordinary symbol. Symbols | |
1151 | with <...> quoting are not folded in any case. */ | |
315e4ebb TT |
1152 | |
1153 | std::string | |
5fea9794 | 1154 | ada_encode (const char *decoded, bool fold) |
315e4ebb | 1155 | { |
5fea9794 | 1156 | if (fold && decoded[0] != '<') |
315e4ebb TT |
1157 | decoded = ada_fold_name (decoded); |
1158 | return ada_encode_1 (decoded, true); | |
1159 | } | |
1160 | ||
529cad9c PH |
1161 | /* Return nonzero if C is either a digit or a lowercase alphabet character. */ |
1162 | ||
1163 | static int | |
1164 | is_lower_alphanum (const char c) | |
1165 | { | |
1166 | return (isdigit (c) || (isalpha (c) && islower (c))); | |
1167 | } | |
1168 | ||
c90092fe JB |
1169 | /* ENCODED is the linkage name of a symbol and LEN contains its length. |
1170 | This function saves in LEN the length of that same symbol name but | |
1171 | without either of these suffixes: | |
29480c32 JB |
1172 | . .{DIGIT}+ |
1173 | . ${DIGIT}+ | |
1174 | . ___{DIGIT}+ | |
1175 | . __{DIGIT}+. | |
c90092fe | 1176 | |
29480c32 JB |
1177 | These are suffixes introduced by the compiler for entities such as |
1178 | nested subprogram for instance, in order to avoid name clashes. | |
1179 | They do not serve any purpose for the debugger. */ | |
1180 | ||
1181 | static void | |
1182 | ada_remove_trailing_digits (const char *encoded, int *len) | |
1183 | { | |
1184 | if (*len > 1 && isdigit (encoded[*len - 1])) | |
1185 | { | |
1186 | int i = *len - 2; | |
5b4ee69b | 1187 | |
29480c32 | 1188 | while (i > 0 && isdigit (encoded[i])) |
dda83cd7 | 1189 | i--; |
29480c32 | 1190 | if (i >= 0 && encoded[i] == '.') |
dda83cd7 | 1191 | *len = i; |
29480c32 | 1192 | else if (i >= 0 && encoded[i] == '$') |
dda83cd7 | 1193 | *len = i; |
61012eef | 1194 | else if (i >= 2 && startswith (encoded + i - 2, "___")) |
dda83cd7 | 1195 | *len = i - 2; |
61012eef | 1196 | else if (i >= 1 && startswith (encoded + i - 1, "__")) |
dda83cd7 | 1197 | *len = i - 1; |
29480c32 JB |
1198 | } |
1199 | } | |
1200 | ||
1201 | /* Remove the suffix introduced by the compiler for protected object | |
1202 | subprograms. */ | |
1203 | ||
1204 | static void | |
1205 | ada_remove_po_subprogram_suffix (const char *encoded, int *len) | |
1206 | { | |
1207 | /* Remove trailing N. */ | |
1208 | ||
1209 | /* Protected entry subprograms are broken into two | |
1210 | separate subprograms: The first one is unprotected, and has | |
1211 | a 'N' suffix; the second is the protected version, and has | |
0963b4bd | 1212 | the 'P' suffix. The second calls the first one after handling |
29480c32 JB |
1213 | the protection. Since the P subprograms are internally generated, |
1214 | we leave these names undecoded, giving the user a clue that this | |
1215 | entity is internal. */ | |
1216 | ||
1217 | if (*len > 1 | |
1218 | && encoded[*len - 1] == 'N' | |
1219 | && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2]))) | |
1220 | *len = *len - 1; | |
1221 | } | |
1222 | ||
965bc1df TT |
1223 | /* If ENCODED ends with a compiler-provided suffix (like ".cold"), |
1224 | then update *LEN to remove the suffix and return the offset of the | |
1225 | character just past the ".". Otherwise, return -1. */ | |
1226 | ||
1227 | static int | |
1228 | remove_compiler_suffix (const char *encoded, int *len) | |
1229 | { | |
1230 | int offset = *len - 1; | |
1231 | while (offset > 0 && isalpha (encoded[offset])) | |
1232 | --offset; | |
1233 | if (offset > 0 && encoded[offset] == '.') | |
1234 | { | |
1235 | *len = offset; | |
1236 | return offset + 1; | |
1237 | } | |
1238 | return -1; | |
1239 | } | |
1240 | ||
315e4ebb TT |
1241 | /* Convert an ASCII hex string to a number. Reads exactly N |
1242 | characters from STR. Returns true on success, false if one of the | |
1243 | digits was not a hex digit. */ | |
1244 | static bool | |
1245 | convert_hex (const char *str, int n, uint32_t *out) | |
1246 | { | |
1247 | uint32_t result = 0; | |
1248 | ||
1249 | for (int i = 0; i < n; ++i) | |
1250 | { | |
1251 | if (!isxdigit (str[i])) | |
1252 | return false; | |
1253 | result <<= 4; | |
1254 | result |= fromhex (str[i]); | |
1255 | } | |
1256 | ||
1257 | *out = result; | |
1258 | return true; | |
1259 | } | |
1260 | ||
1261 | /* Convert a wide character from its ASCII hex representation in STR | |
1262 | (consisting of exactly N characters) to the host encoding, | |
1263 | appending the resulting bytes to OUT. If N==2 and the Ada source | |
1264 | charset is not UTF-8, then hex refers to an encoding in the | |
1265 | ADA_SOURCE_CHARSET; otherwise, use UTF-32. Return true on success. | |
1266 | Return false and do not modify OUT on conversion failure. */ | |
1267 | static bool | |
1268 | convert_from_hex_encoded (std::string &out, const char *str, int n) | |
1269 | { | |
1270 | uint32_t value; | |
1271 | ||
1272 | if (!convert_hex (str, n, &value)) | |
1273 | return false; | |
1274 | try | |
1275 | { | |
1276 | auto_obstack bytes; | |
1277 | /* In the 'U' case, the hex digits encode the character in the | |
1278 | Ada source charset. However, if the source charset is UTF-8, | |
1279 | this really means it is a single-byte UTF-32 character. */ | |
1280 | if (n == 2 && ada_source_charset != ada_utf8) | |
1281 | { | |
1282 | gdb_byte one_char = (gdb_byte) value; | |
1283 | ||
1284 | convert_between_encodings (ada_source_charset, host_charset (), | |
1285 | &one_char, | |
1286 | sizeof (one_char), sizeof (one_char), | |
1287 | &bytes, translit_none); | |
1288 | } | |
1289 | else | |
1290 | convert_between_encodings (HOST_UTF32, host_charset (), | |
1291 | (const gdb_byte *) &value, | |
1292 | sizeof (value), sizeof (value), | |
1293 | &bytes, translit_none); | |
1294 | obstack_1grow (&bytes, '\0'); | |
1295 | out.append ((const char *) obstack_base (&bytes)); | |
1296 | } | |
1297 | catch (const gdb_exception &) | |
1298 | { | |
1299 | /* On failure, the caller will just let the encoded form | |
1300 | through, which seems basically reasonable. */ | |
1301 | return false; | |
1302 | } | |
1303 | ||
1304 | return true; | |
1305 | } | |
1306 | ||
8a3df5ac | 1307 | /* See ada-lang.h. */ |
14f9c5c9 | 1308 | |
f945dedf | 1309 | std::string |
5c94f938 | 1310 | ada_decode (const char *encoded, bool wrap, bool operators) |
14f9c5c9 | 1311 | { |
36f5ca53 | 1312 | int i; |
14f9c5c9 | 1313 | int len0; |
d2e4a39e | 1314 | const char *p; |
14f9c5c9 | 1315 | int at_start_name; |
f945dedf | 1316 | std::string decoded; |
965bc1df | 1317 | int suffix = -1; |
d2e4a39e | 1318 | |
0d81f350 JG |
1319 | /* With function descriptors on PPC64, the value of a symbol named |
1320 | ".FN", if it exists, is the entry point of the function "FN". */ | |
1321 | if (encoded[0] == '.') | |
1322 | encoded += 1; | |
1323 | ||
29480c32 JB |
1324 | /* The name of the Ada main procedure starts with "_ada_". |
1325 | This prefix is not part of the decoded name, so skip this part | |
1326 | if we see this prefix. */ | |
61012eef | 1327 | if (startswith (encoded, "_ada_")) |
4c4b4cd2 | 1328 | encoded += 5; |
81eaa506 TT |
1329 | /* The "___ghost_" prefix is used for ghost entities. Normally |
1330 | these aren't preserved but when they are, it's useful to see | |
1331 | them. */ | |
1332 | if (startswith (encoded, "___ghost_")) | |
1333 | encoded += 9; | |
14f9c5c9 | 1334 | |
29480c32 JB |
1335 | /* If the name starts with '_', then it is not a properly encoded |
1336 | name, so do not attempt to decode it. Similarly, if the name | |
1337 | starts with '<', the name should not be decoded. */ | |
4c4b4cd2 | 1338 | if (encoded[0] == '_' || encoded[0] == '<') |
14f9c5c9 AS |
1339 | goto Suppress; |
1340 | ||
4c4b4cd2 | 1341 | len0 = strlen (encoded); |
4c4b4cd2 | 1342 | |
965bc1df TT |
1343 | suffix = remove_compiler_suffix (encoded, &len0); |
1344 | ||
29480c32 JB |
1345 | ada_remove_trailing_digits (encoded, &len0); |
1346 | ada_remove_po_subprogram_suffix (encoded, &len0); | |
529cad9c | 1347 | |
4c4b4cd2 PH |
1348 | /* Remove the ___X.* suffix if present. Do not forget to verify that |
1349 | the suffix is located before the current "end" of ENCODED. We want | |
1350 | to avoid re-matching parts of ENCODED that have previously been | |
1351 | marked as discarded (by decrementing LEN0). */ | |
1352 | p = strstr (encoded, "___"); | |
1353 | if (p != NULL && p - encoded < len0 - 3) | |
14f9c5c9 AS |
1354 | { |
1355 | if (p[3] == 'X') | |
dda83cd7 | 1356 | len0 = p - encoded; |
14f9c5c9 | 1357 | else |
dda83cd7 | 1358 | goto Suppress; |
14f9c5c9 | 1359 | } |
4c4b4cd2 | 1360 | |
29480c32 JB |
1361 | /* Remove any trailing TKB suffix. It tells us that this symbol |
1362 | is for the body of a task, but that information does not actually | |
1363 | appear in the decoded name. */ | |
1364 | ||
61012eef | 1365 | if (len0 > 3 && startswith (encoded + len0 - 3, "TKB")) |
14f9c5c9 | 1366 | len0 -= 3; |
76a01679 | 1367 | |
a10967fa JB |
1368 | /* Remove any trailing TB suffix. The TB suffix is slightly different |
1369 | from the TKB suffix because it is used for non-anonymous task | |
1370 | bodies. */ | |
1371 | ||
61012eef | 1372 | if (len0 > 2 && startswith (encoded + len0 - 2, "TB")) |
a10967fa JB |
1373 | len0 -= 2; |
1374 | ||
29480c32 JB |
1375 | /* Remove trailing "B" suffixes. */ |
1376 | /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */ | |
1377 | ||
61012eef | 1378 | if (len0 > 1 && startswith (encoded + len0 - 1, "B")) |
14f9c5c9 AS |
1379 | len0 -= 1; |
1380 | ||
29480c32 JB |
1381 | /* Remove trailing __{digit}+ or trailing ${digit}+. */ |
1382 | ||
4c4b4cd2 | 1383 | if (len0 > 1 && isdigit (encoded[len0 - 1])) |
d2e4a39e | 1384 | { |
4c4b4cd2 PH |
1385 | i = len0 - 2; |
1386 | while ((i >= 0 && isdigit (encoded[i])) | |
dda83cd7 SM |
1387 | || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1]))) |
1388 | i -= 1; | |
4c4b4cd2 | 1389 | if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_') |
dda83cd7 | 1390 | len0 = i - 1; |
4c4b4cd2 | 1391 | else if (encoded[i] == '$') |
dda83cd7 | 1392 | len0 = i; |
d2e4a39e | 1393 | } |
14f9c5c9 | 1394 | |
29480c32 JB |
1395 | /* The first few characters that are not alphabetic are not part |
1396 | of any encoding we use, so we can copy them over verbatim. */ | |
1397 | ||
36f5ca53 TT |
1398 | for (i = 0; i < len0 && !isalpha (encoded[i]); i += 1) |
1399 | decoded.push_back (encoded[i]); | |
14f9c5c9 AS |
1400 | |
1401 | at_start_name = 1; | |
1402 | while (i < len0) | |
1403 | { | |
29480c32 | 1404 | /* Is this a symbol function? */ |
5c94f938 | 1405 | if (operators && at_start_name && encoded[i] == 'O') |
dda83cd7 SM |
1406 | { |
1407 | int k; | |
1408 | ||
1409 | for (k = 0; ada_opname_table[k].encoded != NULL; k += 1) | |
1410 | { | |
1411 | int op_len = strlen (ada_opname_table[k].encoded); | |
1412 | if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1, | |
1413 | op_len - 1) == 0) | |
1414 | && !isalnum (encoded[i + op_len])) | |
1415 | { | |
36f5ca53 | 1416 | decoded.append (ada_opname_table[k].decoded); |
dda83cd7 SM |
1417 | at_start_name = 0; |
1418 | i += op_len; | |
dda83cd7 SM |
1419 | break; |
1420 | } | |
1421 | } | |
1422 | if (ada_opname_table[k].encoded != NULL) | |
1423 | continue; | |
1424 | } | |
14f9c5c9 AS |
1425 | at_start_name = 0; |
1426 | ||
529cad9c | 1427 | /* Replace "TK__" with "__", which will eventually be translated |
dda83cd7 | 1428 | into "." (just below). */ |
529cad9c | 1429 | |
61012eef | 1430 | if (i < len0 - 4 && startswith (encoded + i, "TK__")) |
dda83cd7 | 1431 | i += 2; |
529cad9c | 1432 | |
29480c32 | 1433 | /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually |
dda83cd7 SM |
1434 | be translated into "." (just below). These are internal names |
1435 | generated for anonymous blocks inside which our symbol is nested. */ | |
29480c32 JB |
1436 | |
1437 | if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_' | |
dda83cd7 SM |
1438 | && encoded [i+2] == 'B' && encoded [i+3] == '_' |
1439 | && isdigit (encoded [i+4])) | |
1440 | { | |
1441 | int k = i + 5; | |
1442 | ||
1443 | while (k < len0 && isdigit (encoded[k])) | |
1444 | k++; /* Skip any extra digit. */ | |
1445 | ||
1446 | /* Double-check that the "__B_{DIGITS}+" sequence we found | |
1447 | is indeed followed by "__". */ | |
1448 | if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_') | |
1449 | i = k; | |
1450 | } | |
29480c32 | 1451 | |
529cad9c PH |
1452 | /* Remove _E{DIGITS}+[sb] */ |
1453 | ||
1454 | /* Just as for protected object subprograms, there are 2 categories | |
dda83cd7 SM |
1455 | of subprograms created by the compiler for each entry. The first |
1456 | one implements the actual entry code, and has a suffix following | |
1457 | the convention above; the second one implements the barrier and | |
1458 | uses the same convention as above, except that the 'E' is replaced | |
1459 | by a 'B'. | |
529cad9c | 1460 | |
dda83cd7 SM |
1461 | Just as above, we do not decode the name of barrier functions |
1462 | to give the user a clue that the code he is debugging has been | |
1463 | internally generated. */ | |
529cad9c PH |
1464 | |
1465 | if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E' | |
dda83cd7 SM |
1466 | && isdigit (encoded[i+2])) |
1467 | { | |
1468 | int k = i + 3; | |
1469 | ||
1470 | while (k < len0 && isdigit (encoded[k])) | |
1471 | k++; | |
1472 | ||
1473 | if (k < len0 | |
1474 | && (encoded[k] == 'b' || encoded[k] == 's')) | |
1475 | { | |
1476 | k++; | |
1477 | /* Just as an extra precaution, make sure that if this | |
1478 | suffix is followed by anything else, it is a '_'. | |
1479 | Otherwise, we matched this sequence by accident. */ | |
1480 | if (k == len0 | |
1481 | || (k < len0 && encoded[k] == '_')) | |
1482 | i = k; | |
1483 | } | |
1484 | } | |
529cad9c PH |
1485 | |
1486 | /* Remove trailing "N" in [a-z0-9]+N__. The N is added by | |
dda83cd7 | 1487 | the GNAT front-end in protected object subprograms. */ |
529cad9c PH |
1488 | |
1489 | if (i < len0 + 3 | |
dda83cd7 SM |
1490 | && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_') |
1491 | { | |
1492 | /* Backtrack a bit up until we reach either the begining of | |
1493 | the encoded name, or "__". Make sure that we only find | |
1494 | digits or lowercase characters. */ | |
1495 | const char *ptr = encoded + i - 1; | |
1496 | ||
1497 | while (ptr >= encoded && is_lower_alphanum (ptr[0])) | |
1498 | ptr--; | |
1499 | if (ptr < encoded | |
1500 | || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_')) | |
1501 | i++; | |
1502 | } | |
529cad9c | 1503 | |
315e4ebb TT |
1504 | if (i < len0 + 3 && encoded[i] == 'U' && isxdigit (encoded[i + 1])) |
1505 | { | |
1506 | if (convert_from_hex_encoded (decoded, &encoded[i + 1], 2)) | |
1507 | { | |
1508 | i += 3; | |
1509 | continue; | |
1510 | } | |
1511 | } | |
1512 | else if (i < len0 + 5 && encoded[i] == 'W' && isxdigit (encoded[i + 1])) | |
1513 | { | |
1514 | if (convert_from_hex_encoded (decoded, &encoded[i + 1], 4)) | |
1515 | { | |
1516 | i += 5; | |
1517 | continue; | |
1518 | } | |
1519 | } | |
1520 | else if (i < len0 + 10 && encoded[i] == 'W' && encoded[i + 1] == 'W' | |
1521 | && isxdigit (encoded[i + 2])) | |
1522 | { | |
1523 | if (convert_from_hex_encoded (decoded, &encoded[i + 2], 8)) | |
1524 | { | |
1525 | i += 10; | |
1526 | continue; | |
1527 | } | |
1528 | } | |
1529 | ||
4c4b4cd2 | 1530 | if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1])) |
dda83cd7 SM |
1531 | { |
1532 | /* This is a X[bn]* sequence not separated from the previous | |
1533 | part of the name with a non-alpha-numeric character (in other | |
1534 | words, immediately following an alpha-numeric character), then | |
1535 | verify that it is placed at the end of the encoded name. If | |
1536 | not, then the encoding is not valid and we should abort the | |
1537 | decoding. Otherwise, just skip it, it is used in body-nested | |
1538 | package names. */ | |
1539 | do | |
1540 | i += 1; | |
1541 | while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n')); | |
1542 | if (i < len0) | |
1543 | goto Suppress; | |
1544 | } | |
cdc7bb92 | 1545 | else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_') |
dda83cd7 SM |
1546 | { |
1547 | /* Replace '__' by '.'. */ | |
36f5ca53 | 1548 | decoded.push_back ('.'); |
dda83cd7 SM |
1549 | at_start_name = 1; |
1550 | i += 2; | |
dda83cd7 | 1551 | } |
14f9c5c9 | 1552 | else |
dda83cd7 SM |
1553 | { |
1554 | /* It's a character part of the decoded name, so just copy it | |
1555 | over. */ | |
36f5ca53 | 1556 | decoded.push_back (encoded[i]); |
dda83cd7 | 1557 | i += 1; |
dda83cd7 | 1558 | } |
14f9c5c9 | 1559 | } |
14f9c5c9 | 1560 | |
29480c32 JB |
1561 | /* Decoded names should never contain any uppercase character. |
1562 | Double-check this, and abort the decoding if we find one. */ | |
1563 | ||
5c94f938 TT |
1564 | if (operators) |
1565 | { | |
1566 | for (i = 0; i < decoded.length(); ++i) | |
1567 | if (isupper (decoded[i]) || decoded[i] == ' ') | |
1568 | goto Suppress; | |
1569 | } | |
14f9c5c9 | 1570 | |
965bc1df TT |
1571 | /* If the compiler added a suffix, append it now. */ |
1572 | if (suffix >= 0) | |
1573 | decoded = decoded + "[" + &encoded[suffix] + "]"; | |
1574 | ||
f945dedf | 1575 | return decoded; |
14f9c5c9 AS |
1576 | |
1577 | Suppress: | |
8a3df5ac TT |
1578 | if (!wrap) |
1579 | return {}; | |
1580 | ||
4c4b4cd2 | 1581 | if (encoded[0] == '<') |
f945dedf | 1582 | decoded = encoded; |
14f9c5c9 | 1583 | else |
f945dedf | 1584 | decoded = '<' + std::string(encoded) + '>'; |
4c4b4cd2 | 1585 | return decoded; |
4c4b4cd2 PH |
1586 | } |
1587 | ||
1588 | /* Table for keeping permanent unique copies of decoded names. Once | |
1589 | allocated, names in this table are never released. While this is a | |
1590 | storage leak, it should not be significant unless there are massive | |
1591 | changes in the set of decoded names in successive versions of a | |
1592 | symbol table loaded during a single session. */ | |
1593 | static struct htab *decoded_names_store; | |
1594 | ||
1595 | /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it | |
1596 | in the language-specific part of GSYMBOL, if it has not been | |
1597 | previously computed. Tries to save the decoded name in the same | |
1598 | obstack as GSYMBOL, if possible, and otherwise on the heap (so that, | |
1599 | in any case, the decoded symbol has a lifetime at least that of | |
0963b4bd | 1600 | GSYMBOL). |
4c4b4cd2 PH |
1601 | The GSYMBOL parameter is "mutable" in the C++ sense: logically |
1602 | const, but nevertheless modified to a semantically equivalent form | |
0963b4bd | 1603 | when a decoded name is cached in it. */ |
4c4b4cd2 | 1604 | |
45e6c716 | 1605 | const char * |
f85f34ed | 1606 | ada_decode_symbol (const struct general_symbol_info *arg) |
4c4b4cd2 | 1607 | { |
f85f34ed TT |
1608 | struct general_symbol_info *gsymbol = (struct general_symbol_info *) arg; |
1609 | const char **resultp = | |
615b3f62 | 1610 | &gsymbol->language_specific.demangled_name; |
5b4ee69b | 1611 | |
f85f34ed | 1612 | if (!gsymbol->ada_mangled) |
4c4b4cd2 | 1613 | { |
4d4eaa30 | 1614 | std::string decoded = ada_decode (gsymbol->linkage_name ()); |
f85f34ed | 1615 | struct obstack *obstack = gsymbol->language_specific.obstack; |
5b4ee69b | 1616 | |
f85f34ed | 1617 | gsymbol->ada_mangled = 1; |
5b4ee69b | 1618 | |
f85f34ed | 1619 | if (obstack != NULL) |
f945dedf | 1620 | *resultp = obstack_strdup (obstack, decoded.c_str ()); |
f85f34ed | 1621 | else |
dda83cd7 | 1622 | { |
f85f34ed TT |
1623 | /* Sometimes, we can't find a corresponding objfile, in |
1624 | which case, we put the result on the heap. Since we only | |
1625 | decode when needed, we hope this usually does not cause a | |
1626 | significant memory leak (FIXME). */ | |
1627 | ||
dda83cd7 SM |
1628 | char **slot = (char **) htab_find_slot (decoded_names_store, |
1629 | decoded.c_str (), INSERT); | |
5b4ee69b | 1630 | |
dda83cd7 SM |
1631 | if (*slot == NULL) |
1632 | *slot = xstrdup (decoded.c_str ()); | |
1633 | *resultp = *slot; | |
1634 | } | |
4c4b4cd2 | 1635 | } |
14f9c5c9 | 1636 | |
4c4b4cd2 PH |
1637 | return *resultp; |
1638 | } | |
76a01679 | 1639 | |
14f9c5c9 | 1640 | \f |
d2e4a39e | 1641 | |
dda83cd7 | 1642 | /* Arrays */ |
14f9c5c9 | 1643 | |
28c85d6c JB |
1644 | /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure |
1645 | generated by the GNAT compiler to describe the index type used | |
1646 | for each dimension of an array, check whether it follows the latest | |
1647 | known encoding. If not, fix it up to conform to the latest encoding. | |
1648 | Otherwise, do nothing. This function also does nothing if | |
1649 | INDEX_DESC_TYPE is NULL. | |
1650 | ||
85102364 | 1651 | The GNAT encoding used to describe the array index type evolved a bit. |
28c85d6c JB |
1652 | Initially, the information would be provided through the name of each |
1653 | field of the structure type only, while the type of these fields was | |
1654 | described as unspecified and irrelevant. The debugger was then expected | |
1655 | to perform a global type lookup using the name of that field in order | |
1656 | to get access to the full index type description. Because these global | |
1657 | lookups can be very expensive, the encoding was later enhanced to make | |
1658 | the global lookup unnecessary by defining the field type as being | |
1659 | the full index type description. | |
1660 | ||
1661 | The purpose of this routine is to allow us to support older versions | |
1662 | of the compiler by detecting the use of the older encoding, and by | |
1663 | fixing up the INDEX_DESC_TYPE to follow the new one (at this point, | |
1664 | we essentially replace each field's meaningless type by the associated | |
1665 | index subtype). */ | |
1666 | ||
1667 | void | |
1668 | ada_fixup_array_indexes_type (struct type *index_desc_type) | |
1669 | { | |
1670 | int i; | |
1671 | ||
1672 | if (index_desc_type == NULL) | |
1673 | return; | |
1f704f76 | 1674 | gdb_assert (index_desc_type->num_fields () > 0); |
28c85d6c JB |
1675 | |
1676 | /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient | |
1677 | to check one field only, no need to check them all). If not, return | |
1678 | now. | |
1679 | ||
1680 | If our INDEX_DESC_TYPE was generated using the older encoding, | |
1681 | the field type should be a meaningless integer type whose name | |
1682 | is not equal to the field name. */ | |
940da03e SM |
1683 | if (index_desc_type->field (0).type ()->name () != NULL |
1684 | && strcmp (index_desc_type->field (0).type ()->name (), | |
33d16dd9 | 1685 | index_desc_type->field (0).name ()) == 0) |
28c85d6c JB |
1686 | return; |
1687 | ||
1688 | /* Fixup each field of INDEX_DESC_TYPE. */ | |
1f704f76 | 1689 | for (i = 0; i < index_desc_type->num_fields (); i++) |
28c85d6c | 1690 | { |
33d16dd9 | 1691 | const char *name = index_desc_type->field (i).name (); |
28c85d6c JB |
1692 | struct type *raw_type = ada_check_typedef (ada_find_any_type (name)); |
1693 | ||
1694 | if (raw_type) | |
5d14b6e5 | 1695 | index_desc_type->field (i).set_type (raw_type); |
28c85d6c JB |
1696 | } |
1697 | } | |
1698 | ||
4c4b4cd2 PH |
1699 | /* The desc_* routines return primitive portions of array descriptors |
1700 | (fat pointers). */ | |
14f9c5c9 AS |
1701 | |
1702 | /* The descriptor or array type, if any, indicated by TYPE; removes | |
4c4b4cd2 PH |
1703 | level of indirection, if needed. */ |
1704 | ||
d2e4a39e AS |
1705 | static struct type * |
1706 | desc_base_type (struct type *type) | |
14f9c5c9 AS |
1707 | { |
1708 | if (type == NULL) | |
1709 | return NULL; | |
61ee279c | 1710 | type = ada_check_typedef (type); |
78134374 | 1711 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
1712 | type = ada_typedef_target_type (type); |
1713 | ||
1265e4aa | 1714 | if (type != NULL |
78134374 | 1715 | && (type->code () == TYPE_CODE_PTR |
dda83cd7 | 1716 | || type->code () == TYPE_CODE_REF)) |
27710edb | 1717 | return ada_check_typedef (type->target_type ()); |
14f9c5c9 AS |
1718 | else |
1719 | return type; | |
1720 | } | |
1721 | ||
4c4b4cd2 PH |
1722 | /* True iff TYPE indicates a "thin" array pointer type. */ |
1723 | ||
14f9c5c9 | 1724 | static int |
d2e4a39e | 1725 | is_thin_pntr (struct type *type) |
14f9c5c9 | 1726 | { |
d2e4a39e | 1727 | return |
14f9c5c9 AS |
1728 | is_suffix (ada_type_name (desc_base_type (type)), "___XUT") |
1729 | || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE"); | |
1730 | } | |
1731 | ||
4c4b4cd2 PH |
1732 | /* The descriptor type for thin pointer type TYPE. */ |
1733 | ||
d2e4a39e AS |
1734 | static struct type * |
1735 | thin_descriptor_type (struct type *type) | |
14f9c5c9 | 1736 | { |
d2e4a39e | 1737 | struct type *base_type = desc_base_type (type); |
5b4ee69b | 1738 | |
14f9c5c9 AS |
1739 | if (base_type == NULL) |
1740 | return NULL; | |
1741 | if (is_suffix (ada_type_name (base_type), "___XVE")) | |
1742 | return base_type; | |
d2e4a39e | 1743 | else |
14f9c5c9 | 1744 | { |
d2e4a39e | 1745 | struct type *alt_type = ada_find_parallel_type (base_type, "___XVE"); |
5b4ee69b | 1746 | |
14f9c5c9 | 1747 | if (alt_type == NULL) |
dda83cd7 | 1748 | return base_type; |
14f9c5c9 | 1749 | else |
dda83cd7 | 1750 | return alt_type; |
14f9c5c9 AS |
1751 | } |
1752 | } | |
1753 | ||
4c4b4cd2 PH |
1754 | /* A pointer to the array data for thin-pointer value VAL. */ |
1755 | ||
d2e4a39e AS |
1756 | static struct value * |
1757 | thin_data_pntr (struct value *val) | |
14f9c5c9 | 1758 | { |
d0c97917 | 1759 | struct type *type = ada_check_typedef (val->type ()); |
556bdfd4 | 1760 | struct type *data_type = desc_data_target_type (thin_descriptor_type (type)); |
5b4ee69b | 1761 | |
556bdfd4 UW |
1762 | data_type = lookup_pointer_type (data_type); |
1763 | ||
78134374 | 1764 | if (type->code () == TYPE_CODE_PTR) |
556bdfd4 | 1765 | return value_cast (data_type, value_copy (val)); |
d2e4a39e | 1766 | else |
9feb2d07 | 1767 | return value_from_longest (data_type, val->address ()); |
14f9c5c9 AS |
1768 | } |
1769 | ||
4c4b4cd2 PH |
1770 | /* True iff TYPE indicates a "thick" array pointer type. */ |
1771 | ||
14f9c5c9 | 1772 | static int |
d2e4a39e | 1773 | is_thick_pntr (struct type *type) |
14f9c5c9 AS |
1774 | { |
1775 | type = desc_base_type (type); | |
78134374 | 1776 | return (type != NULL && type->code () == TYPE_CODE_STRUCT |
dda83cd7 | 1777 | && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL); |
14f9c5c9 AS |
1778 | } |
1779 | ||
4c4b4cd2 PH |
1780 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
1781 | pointer to one, the type of its bounds data; otherwise, NULL. */ | |
76a01679 | 1782 | |
d2e4a39e AS |
1783 | static struct type * |
1784 | desc_bounds_type (struct type *type) | |
14f9c5c9 | 1785 | { |
d2e4a39e | 1786 | struct type *r; |
14f9c5c9 AS |
1787 | |
1788 | type = desc_base_type (type); | |
1789 | ||
1790 | if (type == NULL) | |
1791 | return NULL; | |
1792 | else if (is_thin_pntr (type)) | |
1793 | { | |
1794 | type = thin_descriptor_type (type); | |
1795 | if (type == NULL) | |
dda83cd7 | 1796 | return NULL; |
14f9c5c9 AS |
1797 | r = lookup_struct_elt_type (type, "BOUNDS", 1); |
1798 | if (r != NULL) | |
dda83cd7 | 1799 | return ada_check_typedef (r); |
14f9c5c9 | 1800 | } |
78134374 | 1801 | else if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
1802 | { |
1803 | r = lookup_struct_elt_type (type, "P_BOUNDS", 1); | |
1804 | if (r != NULL) | |
27710edb | 1805 | return ada_check_typedef (ada_check_typedef (r)->target_type ()); |
14f9c5c9 AS |
1806 | } |
1807 | return NULL; | |
1808 | } | |
1809 | ||
1810 | /* If ARR is an array descriptor (fat or thin pointer), or pointer to | |
4c4b4cd2 PH |
1811 | one, a pointer to its bounds data. Otherwise NULL. */ |
1812 | ||
d2e4a39e AS |
1813 | static struct value * |
1814 | desc_bounds (struct value *arr) | |
14f9c5c9 | 1815 | { |
d0c97917 | 1816 | struct type *type = ada_check_typedef (arr->type ()); |
5b4ee69b | 1817 | |
d2e4a39e | 1818 | if (is_thin_pntr (type)) |
14f9c5c9 | 1819 | { |
d2e4a39e | 1820 | struct type *bounds_type = |
dda83cd7 | 1821 | desc_bounds_type (thin_descriptor_type (type)); |
14f9c5c9 AS |
1822 | LONGEST addr; |
1823 | ||
4cdfadb1 | 1824 | if (bounds_type == NULL) |
dda83cd7 | 1825 | error (_("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1826 | |
1827 | /* NOTE: The following calculation is not really kosher, but | |
dda83cd7 SM |
1828 | since desc_type is an XVE-encoded type (and shouldn't be), |
1829 | the correct calculation is a real pain. FIXME (and fix GCC). */ | |
78134374 | 1830 | if (type->code () == TYPE_CODE_PTR) |
dda83cd7 | 1831 | addr = value_as_long (arr); |
d2e4a39e | 1832 | else |
9feb2d07 | 1833 | addr = arr->address (); |
14f9c5c9 | 1834 | |
d2e4a39e | 1835 | return |
dda83cd7 | 1836 | value_from_longest (lookup_pointer_type (bounds_type), |
df86565b | 1837 | addr - bounds_type->length ()); |
14f9c5c9 AS |
1838 | } |
1839 | ||
1840 | else if (is_thick_pntr (type)) | |
05e522ef | 1841 | { |
158cc4fe | 1842 | struct value *p_bounds = value_struct_elt (&arr, {}, "P_BOUNDS", NULL, |
05e522ef | 1843 | _("Bad GNAT array descriptor")); |
d0c97917 | 1844 | struct type *p_bounds_type = p_bounds->type (); |
05e522ef JB |
1845 | |
1846 | if (p_bounds_type | |
78134374 | 1847 | && p_bounds_type->code () == TYPE_CODE_PTR) |
05e522ef | 1848 | { |
27710edb | 1849 | struct type *target_type = p_bounds_type->target_type (); |
05e522ef | 1850 | |
e46d3488 | 1851 | if (target_type->is_stub ()) |
05e522ef JB |
1852 | p_bounds = value_cast (lookup_pointer_type |
1853 | (ada_check_typedef (target_type)), | |
1854 | p_bounds); | |
1855 | } | |
1856 | else | |
1857 | error (_("Bad GNAT array descriptor")); | |
1858 | ||
1859 | return p_bounds; | |
1860 | } | |
14f9c5c9 AS |
1861 | else |
1862 | return NULL; | |
1863 | } | |
1864 | ||
4c4b4cd2 PH |
1865 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit |
1866 | position of the field containing the address of the bounds data. */ | |
1867 | ||
14f9c5c9 | 1868 | static int |
d2e4a39e | 1869 | fat_pntr_bounds_bitpos (struct type *type) |
14f9c5c9 | 1870 | { |
b610c045 | 1871 | return desc_base_type (type)->field (1).loc_bitpos (); |
14f9c5c9 AS |
1872 | } |
1873 | ||
1874 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1875 | size of the field containing the address of the bounds data. */ |
1876 | ||
14f9c5c9 | 1877 | static int |
d2e4a39e | 1878 | fat_pntr_bounds_bitsize (struct type *type) |
14f9c5c9 AS |
1879 | { |
1880 | type = desc_base_type (type); | |
1881 | ||
d2e4a39e | 1882 | if (TYPE_FIELD_BITSIZE (type, 1) > 0) |
14f9c5c9 AS |
1883 | return TYPE_FIELD_BITSIZE (type, 1); |
1884 | else | |
df86565b | 1885 | return 8 * ada_check_typedef (type->field (1).type ())->length (); |
14f9c5c9 AS |
1886 | } |
1887 | ||
4c4b4cd2 | 1888 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
556bdfd4 UW |
1889 | pointer to one, the type of its array data (a array-with-no-bounds type); |
1890 | otherwise, NULL. Use ada_type_of_array to get an array type with bounds | |
1891 | data. */ | |
4c4b4cd2 | 1892 | |
d2e4a39e | 1893 | static struct type * |
556bdfd4 | 1894 | desc_data_target_type (struct type *type) |
14f9c5c9 AS |
1895 | { |
1896 | type = desc_base_type (type); | |
1897 | ||
4c4b4cd2 | 1898 | /* NOTE: The following is bogus; see comment in desc_bounds. */ |
14f9c5c9 | 1899 | if (is_thin_pntr (type)) |
940da03e | 1900 | return desc_base_type (thin_descriptor_type (type)->field (1).type ()); |
14f9c5c9 | 1901 | else if (is_thick_pntr (type)) |
556bdfd4 UW |
1902 | { |
1903 | struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1); | |
1904 | ||
1905 | if (data_type | |
78134374 | 1906 | && ada_check_typedef (data_type)->code () == TYPE_CODE_PTR) |
27710edb | 1907 | return ada_check_typedef (data_type->target_type ()); |
556bdfd4 UW |
1908 | } |
1909 | ||
1910 | return NULL; | |
14f9c5c9 AS |
1911 | } |
1912 | ||
1913 | /* If ARR is an array descriptor (fat or thin pointer), a pointer to | |
1914 | its array data. */ | |
4c4b4cd2 | 1915 | |
d2e4a39e AS |
1916 | static struct value * |
1917 | desc_data (struct value *arr) | |
14f9c5c9 | 1918 | { |
d0c97917 | 1919 | struct type *type = arr->type (); |
5b4ee69b | 1920 | |
14f9c5c9 AS |
1921 | if (is_thin_pntr (type)) |
1922 | return thin_data_pntr (arr); | |
1923 | else if (is_thick_pntr (type)) | |
158cc4fe | 1924 | return value_struct_elt (&arr, {}, "P_ARRAY", NULL, |
dda83cd7 | 1925 | _("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1926 | else |
1927 | return NULL; | |
1928 | } | |
1929 | ||
1930 | ||
1931 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1932 | position of the field containing the address of the data. */ |
1933 | ||
14f9c5c9 | 1934 | static int |
d2e4a39e | 1935 | fat_pntr_data_bitpos (struct type *type) |
14f9c5c9 | 1936 | { |
b610c045 | 1937 | return desc_base_type (type)->field (0).loc_bitpos (); |
14f9c5c9 AS |
1938 | } |
1939 | ||
1940 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1941 | size of the field containing the address of the data. */ |
1942 | ||
14f9c5c9 | 1943 | static int |
d2e4a39e | 1944 | fat_pntr_data_bitsize (struct type *type) |
14f9c5c9 AS |
1945 | { |
1946 | type = desc_base_type (type); | |
1947 | ||
1948 | if (TYPE_FIELD_BITSIZE (type, 0) > 0) | |
1949 | return TYPE_FIELD_BITSIZE (type, 0); | |
d2e4a39e | 1950 | else |
df86565b | 1951 | return TARGET_CHAR_BIT * type->field (0).type ()->length (); |
14f9c5c9 AS |
1952 | } |
1953 | ||
4c4b4cd2 | 1954 | /* If BOUNDS is an array-bounds structure (or pointer to one), return |
14f9c5c9 | 1955 | the Ith lower bound stored in it, if WHICH is 0, and the Ith upper |
4c4b4cd2 PH |
1956 | bound, if WHICH is 1. The first bound is I=1. */ |
1957 | ||
d2e4a39e AS |
1958 | static struct value * |
1959 | desc_one_bound (struct value *bounds, int i, int which) | |
14f9c5c9 | 1960 | { |
250106a7 TT |
1961 | char bound_name[20]; |
1962 | xsnprintf (bound_name, sizeof (bound_name), "%cB%d", | |
1963 | which ? 'U' : 'L', i - 1); | |
158cc4fe | 1964 | return value_struct_elt (&bounds, {}, bound_name, NULL, |
dda83cd7 | 1965 | _("Bad GNAT array descriptor bounds")); |
14f9c5c9 AS |
1966 | } |
1967 | ||
1968 | /* If BOUNDS is an array-bounds structure type, return the bit position | |
1969 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1970 | bound, if WHICH is 1. The first bound is I=1. */ |
1971 | ||
14f9c5c9 | 1972 | static int |
d2e4a39e | 1973 | desc_bound_bitpos (struct type *type, int i, int which) |
14f9c5c9 | 1974 | { |
b610c045 | 1975 | return desc_base_type (type)->field (2 * i + which - 2).loc_bitpos (); |
14f9c5c9 AS |
1976 | } |
1977 | ||
1978 | /* If BOUNDS is an array-bounds structure type, return the bit field size | |
1979 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1980 | bound, if WHICH is 1. The first bound is I=1. */ |
1981 | ||
76a01679 | 1982 | static int |
d2e4a39e | 1983 | desc_bound_bitsize (struct type *type, int i, int which) |
14f9c5c9 AS |
1984 | { |
1985 | type = desc_base_type (type); | |
1986 | ||
d2e4a39e AS |
1987 | if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0) |
1988 | return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2); | |
1989 | else | |
df86565b | 1990 | return 8 * type->field (2 * i + which - 2).type ()->length (); |
14f9c5c9 AS |
1991 | } |
1992 | ||
1993 | /* If TYPE is the type of an array-bounds structure, the type of its | |
4c4b4cd2 PH |
1994 | Ith bound (numbering from 1). Otherwise, NULL. */ |
1995 | ||
d2e4a39e AS |
1996 | static struct type * |
1997 | desc_index_type (struct type *type, int i) | |
14f9c5c9 AS |
1998 | { |
1999 | type = desc_base_type (type); | |
2000 | ||
78134374 | 2001 | if (type->code () == TYPE_CODE_STRUCT) |
250106a7 TT |
2002 | { |
2003 | char bound_name[20]; | |
2004 | xsnprintf (bound_name, sizeof (bound_name), "LB%d", i - 1); | |
2005 | return lookup_struct_elt_type (type, bound_name, 1); | |
2006 | } | |
d2e4a39e | 2007 | else |
14f9c5c9 AS |
2008 | return NULL; |
2009 | } | |
2010 | ||
4c4b4cd2 PH |
2011 | /* The number of index positions in the array-bounds type TYPE. |
2012 | Return 0 if TYPE is NULL. */ | |
2013 | ||
14f9c5c9 | 2014 | static int |
d2e4a39e | 2015 | desc_arity (struct type *type) |
14f9c5c9 AS |
2016 | { |
2017 | type = desc_base_type (type); | |
2018 | ||
2019 | if (type != NULL) | |
1f704f76 | 2020 | return type->num_fields () / 2; |
14f9c5c9 AS |
2021 | return 0; |
2022 | } | |
2023 | ||
4c4b4cd2 PH |
2024 | /* Non-zero iff TYPE is a simple array type (not a pointer to one) or |
2025 | an array descriptor type (representing an unconstrained array | |
2026 | type). */ | |
2027 | ||
76a01679 JB |
2028 | static int |
2029 | ada_is_direct_array_type (struct type *type) | |
4c4b4cd2 PH |
2030 | { |
2031 | if (type == NULL) | |
2032 | return 0; | |
61ee279c | 2033 | type = ada_check_typedef (type); |
78134374 | 2034 | return (type->code () == TYPE_CODE_ARRAY |
dda83cd7 | 2035 | || ada_is_array_descriptor_type (type)); |
4c4b4cd2 PH |
2036 | } |
2037 | ||
52ce6436 | 2038 | /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer |
0963b4bd | 2039 | * to one. */ |
52ce6436 | 2040 | |
2c0b251b | 2041 | static int |
52ce6436 PH |
2042 | ada_is_array_type (struct type *type) |
2043 | { | |
78134374 SM |
2044 | while (type != NULL |
2045 | && (type->code () == TYPE_CODE_PTR | |
2046 | || type->code () == TYPE_CODE_REF)) | |
27710edb | 2047 | type = type->target_type (); |
52ce6436 PH |
2048 | return ada_is_direct_array_type (type); |
2049 | } | |
2050 | ||
4c4b4cd2 | 2051 | /* Non-zero iff TYPE is a simple array type or pointer to one. */ |
14f9c5c9 | 2052 | |
14f9c5c9 | 2053 | int |
4c4b4cd2 | 2054 | ada_is_simple_array_type (struct type *type) |
14f9c5c9 AS |
2055 | { |
2056 | if (type == NULL) | |
2057 | return 0; | |
61ee279c | 2058 | type = ada_check_typedef (type); |
78134374 SM |
2059 | return (type->code () == TYPE_CODE_ARRAY |
2060 | || (type->code () == TYPE_CODE_PTR | |
27710edb | 2061 | && (ada_check_typedef (type->target_type ())->code () |
78134374 | 2062 | == TYPE_CODE_ARRAY))); |
14f9c5c9 AS |
2063 | } |
2064 | ||
4c4b4cd2 PH |
2065 | /* Non-zero iff TYPE belongs to a GNAT array descriptor. */ |
2066 | ||
14f9c5c9 | 2067 | int |
4c4b4cd2 | 2068 | ada_is_array_descriptor_type (struct type *type) |
14f9c5c9 | 2069 | { |
556bdfd4 | 2070 | struct type *data_type = desc_data_target_type (type); |
14f9c5c9 AS |
2071 | |
2072 | if (type == NULL) | |
2073 | return 0; | |
61ee279c | 2074 | type = ada_check_typedef (type); |
556bdfd4 | 2075 | return (data_type != NULL |
78134374 | 2076 | && data_type->code () == TYPE_CODE_ARRAY |
556bdfd4 | 2077 | && desc_arity (desc_bounds_type (type)) > 0); |
14f9c5c9 AS |
2078 | } |
2079 | ||
2080 | /* Non-zero iff type is a partially mal-formed GNAT array | |
4c4b4cd2 | 2081 | descriptor. FIXME: This is to compensate for some problems with |
14f9c5c9 | 2082 | debugging output from GNAT. Re-examine periodically to see if it |
4c4b4cd2 PH |
2083 | is still needed. */ |
2084 | ||
14f9c5c9 | 2085 | int |
ebf56fd3 | 2086 | ada_is_bogus_array_descriptor (struct type *type) |
14f9c5c9 | 2087 | { |
d2e4a39e | 2088 | return |
14f9c5c9 | 2089 | type != NULL |
78134374 | 2090 | && type->code () == TYPE_CODE_STRUCT |
14f9c5c9 | 2091 | && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL |
dda83cd7 | 2092 | || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL) |
4c4b4cd2 | 2093 | && !ada_is_array_descriptor_type (type); |
14f9c5c9 AS |
2094 | } |
2095 | ||
2096 | ||
4c4b4cd2 | 2097 | /* If ARR has a record type in the form of a standard GNAT array descriptor, |
14f9c5c9 | 2098 | (fat pointer) returns the type of the array data described---specifically, |
4c4b4cd2 | 2099 | a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled |
14f9c5c9 | 2100 | in from the descriptor; otherwise, they are left unspecified. If |
4c4b4cd2 PH |
2101 | the ARR denotes a null array descriptor and BOUNDS is non-zero, |
2102 | returns NULL. The result is simply the type of ARR if ARR is not | |
14f9c5c9 | 2103 | a descriptor. */ |
de93309a SM |
2104 | |
2105 | static struct type * | |
d2e4a39e | 2106 | ada_type_of_array (struct value *arr, int bounds) |
14f9c5c9 | 2107 | { |
d0c97917 TT |
2108 | if (ada_is_constrained_packed_array_type (arr->type ())) |
2109 | return decode_constrained_packed_array_type (arr->type ()); | |
14f9c5c9 | 2110 | |
d0c97917 TT |
2111 | if (!ada_is_array_descriptor_type (arr->type ())) |
2112 | return arr->type (); | |
d2e4a39e AS |
2113 | |
2114 | if (!bounds) | |
ad82864c JB |
2115 | { |
2116 | struct type *array_type = | |
d0c97917 | 2117 | ada_check_typedef (desc_data_target_type (arr->type ())); |
ad82864c | 2118 | |
d0c97917 | 2119 | if (ada_is_unconstrained_packed_array_type (arr->type ())) |
ad82864c | 2120 | TYPE_FIELD_BITSIZE (array_type, 0) = |
d0c97917 | 2121 | decode_packed_array_bitsize (arr->type ()); |
ad82864c JB |
2122 | |
2123 | return array_type; | |
2124 | } | |
14f9c5c9 AS |
2125 | else |
2126 | { | |
d2e4a39e | 2127 | struct type *elt_type; |
14f9c5c9 | 2128 | int arity; |
d2e4a39e | 2129 | struct value *descriptor; |
14f9c5c9 | 2130 | |
d0c97917 TT |
2131 | elt_type = ada_array_element_type (arr->type (), -1); |
2132 | arity = ada_array_arity (arr->type ()); | |
14f9c5c9 | 2133 | |
d2e4a39e | 2134 | if (elt_type == NULL || arity == 0) |
d0c97917 | 2135 | return ada_check_typedef (arr->type ()); |
14f9c5c9 AS |
2136 | |
2137 | descriptor = desc_bounds (arr); | |
d2e4a39e | 2138 | if (value_as_long (descriptor) == 0) |
dda83cd7 | 2139 | return NULL; |
d2e4a39e | 2140 | while (arity > 0) |
dda83cd7 | 2141 | { |
d0c97917 TT |
2142 | struct type *range_type = alloc_type_copy (arr->type ()); |
2143 | struct type *array_type = alloc_type_copy (arr->type ()); | |
dda83cd7 SM |
2144 | struct value *low = desc_one_bound (descriptor, arity, 0); |
2145 | struct value *high = desc_one_bound (descriptor, arity, 1); | |
2146 | ||
2147 | arity -= 1; | |
d0c97917 | 2148 | create_static_range_type (range_type, low->type (), |
0c9c3474 SA |
2149 | longest_to_int (value_as_long (low)), |
2150 | longest_to_int (value_as_long (high))); | |
dda83cd7 | 2151 | elt_type = create_array_type (array_type, elt_type, range_type); |
ad82864c | 2152 | |
d0c97917 | 2153 | if (ada_is_unconstrained_packed_array_type (arr->type ())) |
e67ad678 JB |
2154 | { |
2155 | /* We need to store the element packed bitsize, as well as | |
dda83cd7 | 2156 | recompute the array size, because it was previously |
e67ad678 JB |
2157 | computed based on the unpacked element size. */ |
2158 | LONGEST lo = value_as_long (low); | |
2159 | LONGEST hi = value_as_long (high); | |
2160 | ||
2161 | TYPE_FIELD_BITSIZE (elt_type, 0) = | |
d0c97917 | 2162 | decode_packed_array_bitsize (arr->type ()); |
e67ad678 | 2163 | /* If the array has no element, then the size is already |
dda83cd7 | 2164 | zero, and does not need to be recomputed. */ |
e67ad678 JB |
2165 | if (lo < hi) |
2166 | { | |
2167 | int array_bitsize = | |
dda83cd7 | 2168 | (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0); |
e67ad678 | 2169 | |
b6cdbc9a | 2170 | array_type->set_length ((array_bitsize + 7) / 8); |
e67ad678 JB |
2171 | } |
2172 | } | |
dda83cd7 | 2173 | } |
14f9c5c9 AS |
2174 | |
2175 | return lookup_pointer_type (elt_type); | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | /* If ARR does not represent an array, returns ARR unchanged. | |
4c4b4cd2 PH |
2180 | Otherwise, returns either a standard GDB array with bounds set |
2181 | appropriately or, if ARR is a non-null fat pointer, a pointer to a standard | |
2182 | GDB array. Returns NULL if ARR is a null fat pointer. */ | |
2183 | ||
d2e4a39e AS |
2184 | struct value * |
2185 | ada_coerce_to_simple_array_ptr (struct value *arr) | |
14f9c5c9 | 2186 | { |
d0c97917 | 2187 | if (ada_is_array_descriptor_type (arr->type ())) |
14f9c5c9 | 2188 | { |
d2e4a39e | 2189 | struct type *arrType = ada_type_of_array (arr, 1); |
5b4ee69b | 2190 | |
14f9c5c9 | 2191 | if (arrType == NULL) |
dda83cd7 | 2192 | return NULL; |
14f9c5c9 AS |
2193 | return value_cast (arrType, value_copy (desc_data (arr))); |
2194 | } | |
d0c97917 | 2195 | else if (ada_is_constrained_packed_array_type (arr->type ())) |
ad82864c | 2196 | return decode_constrained_packed_array (arr); |
14f9c5c9 AS |
2197 | else |
2198 | return arr; | |
2199 | } | |
2200 | ||
2201 | /* If ARR does not represent an array, returns ARR unchanged. | |
2202 | Otherwise, returns a standard GDB array describing ARR (which may | |
4c4b4cd2 PH |
2203 | be ARR itself if it already is in the proper form). */ |
2204 | ||
720d1a40 | 2205 | struct value * |
d2e4a39e | 2206 | ada_coerce_to_simple_array (struct value *arr) |
14f9c5c9 | 2207 | { |
d0c97917 | 2208 | if (ada_is_array_descriptor_type (arr->type ())) |
14f9c5c9 | 2209 | { |
d2e4a39e | 2210 | struct value *arrVal = ada_coerce_to_simple_array_ptr (arr); |
5b4ee69b | 2211 | |
14f9c5c9 | 2212 | if (arrVal == NULL) |
dda83cd7 | 2213 | error (_("Bounds unavailable for null array pointer.")); |
14f9c5c9 AS |
2214 | return value_ind (arrVal); |
2215 | } | |
d0c97917 | 2216 | else if (ada_is_constrained_packed_array_type (arr->type ())) |
ad82864c | 2217 | return decode_constrained_packed_array (arr); |
d2e4a39e | 2218 | else |
14f9c5c9 AS |
2219 | return arr; |
2220 | } | |
2221 | ||
2222 | /* If TYPE represents a GNAT array type, return it translated to an | |
2223 | ordinary GDB array type (possibly with BITSIZE fields indicating | |
4c4b4cd2 PH |
2224 | packing). For other types, is the identity. */ |
2225 | ||
d2e4a39e AS |
2226 | struct type * |
2227 | ada_coerce_to_simple_array_type (struct type *type) | |
14f9c5c9 | 2228 | { |
ad82864c JB |
2229 | if (ada_is_constrained_packed_array_type (type)) |
2230 | return decode_constrained_packed_array_type (type); | |
17280b9f UW |
2231 | |
2232 | if (ada_is_array_descriptor_type (type)) | |
556bdfd4 | 2233 | return ada_check_typedef (desc_data_target_type (type)); |
17280b9f UW |
2234 | |
2235 | return type; | |
14f9c5c9 AS |
2236 | } |
2237 | ||
4c4b4cd2 PH |
2238 | /* Non-zero iff TYPE represents a standard GNAT packed-array type. */ |
2239 | ||
ad82864c | 2240 | static int |
57567375 | 2241 | ada_is_gnat_encoded_packed_array_type (struct type *type) |
14f9c5c9 AS |
2242 | { |
2243 | if (type == NULL) | |
2244 | return 0; | |
4c4b4cd2 | 2245 | type = desc_base_type (type); |
61ee279c | 2246 | type = ada_check_typedef (type); |
d2e4a39e | 2247 | return |
14f9c5c9 AS |
2248 | ada_type_name (type) != NULL |
2249 | && strstr (ada_type_name (type), "___XP") != NULL; | |
2250 | } | |
2251 | ||
ad82864c JB |
2252 | /* Non-zero iff TYPE represents a standard GNAT constrained |
2253 | packed-array type. */ | |
2254 | ||
2255 | int | |
2256 | ada_is_constrained_packed_array_type (struct type *type) | |
2257 | { | |
57567375 | 2258 | return ada_is_gnat_encoded_packed_array_type (type) |
ad82864c JB |
2259 | && !ada_is_array_descriptor_type (type); |
2260 | } | |
2261 | ||
2262 | /* Non-zero iff TYPE represents an array descriptor for a | |
2263 | unconstrained packed-array type. */ | |
2264 | ||
2265 | static int | |
2266 | ada_is_unconstrained_packed_array_type (struct type *type) | |
2267 | { | |
57567375 TT |
2268 | if (!ada_is_array_descriptor_type (type)) |
2269 | return 0; | |
2270 | ||
2271 | if (ada_is_gnat_encoded_packed_array_type (type)) | |
2272 | return 1; | |
2273 | ||
2274 | /* If we saw GNAT encodings, then the above code is sufficient. | |
2275 | However, with minimal encodings, we will just have a thick | |
2276 | pointer instead. */ | |
2277 | if (is_thick_pntr (type)) | |
2278 | { | |
2279 | type = desc_base_type (type); | |
2280 | /* The structure's first field is a pointer to an array, so this | |
2281 | fetches the array type. */ | |
27710edb | 2282 | type = type->field (0).type ()->target_type (); |
af5300fe TV |
2283 | if (type->code () == TYPE_CODE_TYPEDEF) |
2284 | type = ada_typedef_target_type (type); | |
57567375 TT |
2285 | /* Now we can see if the array elements are packed. */ |
2286 | return TYPE_FIELD_BITSIZE (type, 0) > 0; | |
2287 | } | |
2288 | ||
2289 | return 0; | |
ad82864c JB |
2290 | } |
2291 | ||
c9a28cbe TT |
2292 | /* Return true if TYPE is a (Gnat-encoded) constrained packed array |
2293 | type, or if it is an ordinary (non-Gnat-encoded) packed array. */ | |
2294 | ||
2295 | static bool | |
2296 | ada_is_any_packed_array_type (struct type *type) | |
2297 | { | |
2298 | return (ada_is_constrained_packed_array_type (type) | |
2299 | || (type->code () == TYPE_CODE_ARRAY | |
2300 | && TYPE_FIELD_BITSIZE (type, 0) % 8 != 0)); | |
2301 | } | |
2302 | ||
ad82864c JB |
2303 | /* Given that TYPE encodes a packed array type (constrained or unconstrained), |
2304 | return the size of its elements in bits. */ | |
2305 | ||
2306 | static long | |
2307 | decode_packed_array_bitsize (struct type *type) | |
2308 | { | |
0d5cff50 DE |
2309 | const char *raw_name; |
2310 | const char *tail; | |
ad82864c JB |
2311 | long bits; |
2312 | ||
720d1a40 JB |
2313 | /* Access to arrays implemented as fat pointers are encoded as a typedef |
2314 | of the fat pointer type. We need the name of the fat pointer type | |
2315 | to do the decoding, so strip the typedef layer. */ | |
78134374 | 2316 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
2317 | type = ada_typedef_target_type (type); |
2318 | ||
2319 | raw_name = ada_type_name (ada_check_typedef (type)); | |
ad82864c JB |
2320 | if (!raw_name) |
2321 | raw_name = ada_type_name (desc_base_type (type)); | |
2322 | ||
2323 | if (!raw_name) | |
2324 | return 0; | |
2325 | ||
2326 | tail = strstr (raw_name, "___XP"); | |
57567375 TT |
2327 | if (tail == nullptr) |
2328 | { | |
2329 | gdb_assert (is_thick_pntr (type)); | |
2330 | /* The structure's first field is a pointer to an array, so this | |
2331 | fetches the array type. */ | |
27710edb | 2332 | type = type->field (0).type ()->target_type (); |
57567375 TT |
2333 | /* Now we can see if the array elements are packed. */ |
2334 | return TYPE_FIELD_BITSIZE (type, 0); | |
2335 | } | |
ad82864c JB |
2336 | |
2337 | if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1) | |
2338 | { | |
2339 | lim_warning | |
2340 | (_("could not understand bit size information on packed array")); | |
2341 | return 0; | |
2342 | } | |
2343 | ||
2344 | return bits; | |
2345 | } | |
2346 | ||
14f9c5c9 AS |
2347 | /* Given that TYPE is a standard GDB array type with all bounds filled |
2348 | in, and that the element size of its ultimate scalar constituents | |
2349 | (that is, either its elements, or, if it is an array of arrays, its | |
2350 | elements' elements, etc.) is *ELT_BITS, return an identical type, | |
2351 | but with the bit sizes of its elements (and those of any | |
2352 | constituent arrays) recorded in the BITSIZE components of its | |
4c4b4cd2 | 2353 | TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size |
4a46959e JB |
2354 | in bits. |
2355 | ||
2356 | Note that, for arrays whose index type has an XA encoding where | |
2357 | a bound references a record discriminant, getting that discriminant, | |
2358 | and therefore the actual value of that bound, is not possible | |
2359 | because none of the given parameters gives us access to the record. | |
2360 | This function assumes that it is OK in the context where it is being | |
2361 | used to return an array whose bounds are still dynamic and where | |
2362 | the length is arbitrary. */ | |
4c4b4cd2 | 2363 | |
d2e4a39e | 2364 | static struct type * |
ad82864c | 2365 | constrained_packed_array_type (struct type *type, long *elt_bits) |
14f9c5c9 | 2366 | { |
d2e4a39e AS |
2367 | struct type *new_elt_type; |
2368 | struct type *new_type; | |
99b1c762 JB |
2369 | struct type *index_type_desc; |
2370 | struct type *index_type; | |
14f9c5c9 AS |
2371 | LONGEST low_bound, high_bound; |
2372 | ||
61ee279c | 2373 | type = ada_check_typedef (type); |
78134374 | 2374 | if (type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 AS |
2375 | return type; |
2376 | ||
99b1c762 JB |
2377 | index_type_desc = ada_find_parallel_type (type, "___XA"); |
2378 | if (index_type_desc) | |
940da03e | 2379 | index_type = to_fixed_range_type (index_type_desc->field (0).type (), |
99b1c762 JB |
2380 | NULL); |
2381 | else | |
3d967001 | 2382 | index_type = type->index_type (); |
99b1c762 | 2383 | |
e9bb382b | 2384 | new_type = alloc_type_copy (type); |
ad82864c | 2385 | new_elt_type = |
27710edb | 2386 | constrained_packed_array_type (ada_check_typedef (type->target_type ()), |
ad82864c | 2387 | elt_bits); |
99b1c762 | 2388 | create_array_type (new_type, new_elt_type, index_type); |
14f9c5c9 | 2389 | TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits; |
d0e39ea2 | 2390 | new_type->set_name (ada_type_name (type)); |
14f9c5c9 | 2391 | |
78134374 | 2392 | if ((check_typedef (index_type)->code () == TYPE_CODE_RANGE |
4a46959e | 2393 | && is_dynamic_type (check_typedef (index_type))) |
1f8d2881 | 2394 | || !get_discrete_bounds (index_type, &low_bound, &high_bound)) |
14f9c5c9 AS |
2395 | low_bound = high_bound = 0; |
2396 | if (high_bound < low_bound) | |
b6cdbc9a SM |
2397 | { |
2398 | *elt_bits = 0; | |
2399 | new_type->set_length (0); | |
2400 | } | |
d2e4a39e | 2401 | else |
14f9c5c9 AS |
2402 | { |
2403 | *elt_bits *= (high_bound - low_bound + 1); | |
b6cdbc9a | 2404 | new_type->set_length ((*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT); |
14f9c5c9 AS |
2405 | } |
2406 | ||
9cdd0d12 | 2407 | new_type->set_is_fixed_instance (true); |
14f9c5c9 AS |
2408 | return new_type; |
2409 | } | |
2410 | ||
ad82864c JB |
2411 | /* The array type encoded by TYPE, where |
2412 | ada_is_constrained_packed_array_type (TYPE). */ | |
4c4b4cd2 | 2413 | |
d2e4a39e | 2414 | static struct type * |
ad82864c | 2415 | decode_constrained_packed_array_type (struct type *type) |
d2e4a39e | 2416 | { |
0d5cff50 | 2417 | const char *raw_name = ada_type_name (ada_check_typedef (type)); |
727e3d2e | 2418 | char *name; |
0d5cff50 | 2419 | const char *tail; |
d2e4a39e | 2420 | struct type *shadow_type; |
14f9c5c9 | 2421 | long bits; |
14f9c5c9 | 2422 | |
727e3d2e JB |
2423 | if (!raw_name) |
2424 | raw_name = ada_type_name (desc_base_type (type)); | |
2425 | ||
2426 | if (!raw_name) | |
2427 | return NULL; | |
2428 | ||
2429 | name = (char *) alloca (strlen (raw_name) + 1); | |
2430 | tail = strstr (raw_name, "___XP"); | |
4c4b4cd2 PH |
2431 | type = desc_base_type (type); |
2432 | ||
14f9c5c9 AS |
2433 | memcpy (name, raw_name, tail - raw_name); |
2434 | name[tail - raw_name] = '\000'; | |
2435 | ||
b4ba55a1 JB |
2436 | shadow_type = ada_find_parallel_type_with_name (type, name); |
2437 | ||
2438 | if (shadow_type == NULL) | |
14f9c5c9 | 2439 | { |
323e0a4a | 2440 | lim_warning (_("could not find bounds information on packed array")); |
14f9c5c9 AS |
2441 | return NULL; |
2442 | } | |
f168693b | 2443 | shadow_type = check_typedef (shadow_type); |
14f9c5c9 | 2444 | |
78134374 | 2445 | if (shadow_type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 | 2446 | { |
0963b4bd MS |
2447 | lim_warning (_("could not understand bounds " |
2448 | "information on packed array")); | |
14f9c5c9 AS |
2449 | return NULL; |
2450 | } | |
d2e4a39e | 2451 | |
ad82864c JB |
2452 | bits = decode_packed_array_bitsize (type); |
2453 | return constrained_packed_array_type (shadow_type, &bits); | |
14f9c5c9 AS |
2454 | } |
2455 | ||
a7400e44 TT |
2456 | /* Helper function for decode_constrained_packed_array. Set the field |
2457 | bitsize on a series of packed arrays. Returns the number of | |
2458 | elements in TYPE. */ | |
2459 | ||
2460 | static LONGEST | |
2461 | recursively_update_array_bitsize (struct type *type) | |
2462 | { | |
2463 | gdb_assert (type->code () == TYPE_CODE_ARRAY); | |
2464 | ||
2465 | LONGEST low, high; | |
1f8d2881 | 2466 | if (!get_discrete_bounds (type->index_type (), &low, &high) |
a7400e44 TT |
2467 | || low > high) |
2468 | return 0; | |
2469 | LONGEST our_len = high - low + 1; | |
2470 | ||
27710edb | 2471 | struct type *elt_type = type->target_type (); |
a7400e44 TT |
2472 | if (elt_type->code () == TYPE_CODE_ARRAY) |
2473 | { | |
2474 | LONGEST elt_len = recursively_update_array_bitsize (elt_type); | |
2475 | LONGEST elt_bitsize = elt_len * TYPE_FIELD_BITSIZE (elt_type, 0); | |
2476 | TYPE_FIELD_BITSIZE (type, 0) = elt_bitsize; | |
2477 | ||
b6cdbc9a SM |
2478 | type->set_length (((our_len * elt_bitsize + HOST_CHAR_BIT - 1) |
2479 | / HOST_CHAR_BIT)); | |
a7400e44 TT |
2480 | } |
2481 | ||
2482 | return our_len; | |
2483 | } | |
2484 | ||
ad82864c JB |
2485 | /* Given that ARR is a struct value *indicating a GNAT constrained packed |
2486 | array, returns a simple array that denotes that array. Its type is a | |
14f9c5c9 AS |
2487 | standard GDB array type except that the BITSIZEs of the array |
2488 | target types are set to the number of bits in each element, and the | |
4c4b4cd2 | 2489 | type length is set appropriately. */ |
14f9c5c9 | 2490 | |
d2e4a39e | 2491 | static struct value * |
ad82864c | 2492 | decode_constrained_packed_array (struct value *arr) |
14f9c5c9 | 2493 | { |
4c4b4cd2 | 2494 | struct type *type; |
14f9c5c9 | 2495 | |
11aa919a PMR |
2496 | /* If our value is a pointer, then dereference it. Likewise if |
2497 | the value is a reference. Make sure that this operation does not | |
2498 | cause the target type to be fixed, as this would indirectly cause | |
2499 | this array to be decoded. The rest of the routine assumes that | |
2500 | the array hasn't been decoded yet, so we use the basic "coerce_ref" | |
2501 | and "value_ind" routines to perform the dereferencing, as opposed | |
2502 | to using "ada_coerce_ref" or "ada_value_ind". */ | |
2503 | arr = coerce_ref (arr); | |
d0c97917 | 2504 | if (ada_check_typedef (arr->type ())->code () == TYPE_CODE_PTR) |
284614f0 | 2505 | arr = value_ind (arr); |
4c4b4cd2 | 2506 | |
d0c97917 | 2507 | type = decode_constrained_packed_array_type (arr->type ()); |
14f9c5c9 AS |
2508 | if (type == NULL) |
2509 | { | |
323e0a4a | 2510 | error (_("can't unpack array")); |
14f9c5c9 AS |
2511 | return NULL; |
2512 | } | |
61ee279c | 2513 | |
a7400e44 TT |
2514 | /* Decoding the packed array type could not correctly set the field |
2515 | bitsizes for any dimension except the innermost, because the | |
2516 | bounds may be variable and were not passed to that function. So, | |
2517 | we further resolve the array bounds here and then update the | |
2518 | sizes. */ | |
50888e42 | 2519 | const gdb_byte *valaddr = value_contents_for_printing (arr).data (); |
9feb2d07 | 2520 | CORE_ADDR address = arr->address (); |
a7400e44 | 2521 | gdb::array_view<const gdb_byte> view |
df86565b | 2522 | = gdb::make_array_view (valaddr, type->length ()); |
a7400e44 TT |
2523 | type = resolve_dynamic_type (type, view, address); |
2524 | recursively_update_array_bitsize (type); | |
2525 | ||
d0c97917 TT |
2526 | if (type_byte_order (arr->type ()) == BFD_ENDIAN_BIG |
2527 | && ada_is_modular_type (arr->type ())) | |
61ee279c PH |
2528 | { |
2529 | /* This is a (right-justified) modular type representing a packed | |
24b21115 SM |
2530 | array with no wrapper. In order to interpret the value through |
2531 | the (left-justified) packed array type we just built, we must | |
2532 | first left-justify it. */ | |
61ee279c PH |
2533 | int bit_size, bit_pos; |
2534 | ULONGEST mod; | |
2535 | ||
d0c97917 | 2536 | mod = ada_modulus (arr->type ()) - 1; |
61ee279c PH |
2537 | bit_size = 0; |
2538 | while (mod > 0) | |
2539 | { | |
2540 | bit_size += 1; | |
2541 | mod >>= 1; | |
2542 | } | |
d0c97917 | 2543 | bit_pos = HOST_CHAR_BIT * arr->type ()->length () - bit_size; |
61ee279c PH |
2544 | arr = ada_value_primitive_packed_val (arr, NULL, |
2545 | bit_pos / HOST_CHAR_BIT, | |
2546 | bit_pos % HOST_CHAR_BIT, | |
2547 | bit_size, | |
2548 | type); | |
2549 | } | |
2550 | ||
4c4b4cd2 | 2551 | return coerce_unspec_val_to_type (arr, type); |
14f9c5c9 AS |
2552 | } |
2553 | ||
2554 | ||
2555 | /* The value of the element of packed array ARR at the ARITY indices | |
4c4b4cd2 | 2556 | given in IND. ARR must be a simple array. */ |
14f9c5c9 | 2557 | |
d2e4a39e AS |
2558 | static struct value * |
2559 | value_subscript_packed (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
2560 | { |
2561 | int i; | |
2562 | int bits, elt_off, bit_off; | |
2563 | long elt_total_bit_offset; | |
d2e4a39e AS |
2564 | struct type *elt_type; |
2565 | struct value *v; | |
14f9c5c9 AS |
2566 | |
2567 | bits = 0; | |
2568 | elt_total_bit_offset = 0; | |
d0c97917 | 2569 | elt_type = ada_check_typedef (arr->type ()); |
d2e4a39e | 2570 | for (i = 0; i < arity; i += 1) |
14f9c5c9 | 2571 | { |
78134374 | 2572 | if (elt_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
2573 | || TYPE_FIELD_BITSIZE (elt_type, 0) == 0) |
2574 | error | |
2575 | (_("attempt to do packed indexing of " | |
0963b4bd | 2576 | "something other than a packed array")); |
14f9c5c9 | 2577 | else |
dda83cd7 SM |
2578 | { |
2579 | struct type *range_type = elt_type->index_type (); | |
2580 | LONGEST lowerbound, upperbound; | |
2581 | LONGEST idx; | |
2582 | ||
1f8d2881 | 2583 | if (!get_discrete_bounds (range_type, &lowerbound, &upperbound)) |
dda83cd7 SM |
2584 | { |
2585 | lim_warning (_("don't know bounds of array")); | |
2586 | lowerbound = upperbound = 0; | |
2587 | } | |
2588 | ||
2589 | idx = pos_atr (ind[i]); | |
2590 | if (idx < lowerbound || idx > upperbound) | |
2591 | lim_warning (_("packed array index %ld out of bounds"), | |
0963b4bd | 2592 | (long) idx); |
dda83cd7 SM |
2593 | bits = TYPE_FIELD_BITSIZE (elt_type, 0); |
2594 | elt_total_bit_offset += (idx - lowerbound) * bits; | |
27710edb | 2595 | elt_type = ada_check_typedef (elt_type->target_type ()); |
dda83cd7 | 2596 | } |
14f9c5c9 AS |
2597 | } |
2598 | elt_off = elt_total_bit_offset / HOST_CHAR_BIT; | |
2599 | bit_off = elt_total_bit_offset % HOST_CHAR_BIT; | |
d2e4a39e AS |
2600 | |
2601 | v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off, | |
dda83cd7 | 2602 | bits, elt_type); |
14f9c5c9 AS |
2603 | return v; |
2604 | } | |
2605 | ||
4c4b4cd2 | 2606 | /* Non-zero iff TYPE includes negative integer values. */ |
14f9c5c9 AS |
2607 | |
2608 | static int | |
d2e4a39e | 2609 | has_negatives (struct type *type) |
14f9c5c9 | 2610 | { |
78134374 | 2611 | switch (type->code ()) |
d2e4a39e AS |
2612 | { |
2613 | default: | |
2614 | return 0; | |
2615 | case TYPE_CODE_INT: | |
c6d940a9 | 2616 | return !type->is_unsigned (); |
d2e4a39e | 2617 | case TYPE_CODE_RANGE: |
5537ddd0 | 2618 | return type->bounds ()->low.const_val () - type->bounds ()->bias < 0; |
d2e4a39e | 2619 | } |
14f9c5c9 | 2620 | } |
d2e4a39e | 2621 | |
f93fca70 | 2622 | /* With SRC being a buffer containing BIT_SIZE bits of data at BIT_OFFSET, |
5b639dea | 2623 | unpack that data into UNPACKED. UNPACKED_LEN is the size in bytes of |
f93fca70 | 2624 | the unpacked buffer. |
14f9c5c9 | 2625 | |
5b639dea JB |
2626 | The size of the unpacked buffer (UNPACKED_LEN) is expected to be large |
2627 | enough to contain at least BIT_OFFSET bits. If not, an error is raised. | |
2628 | ||
f93fca70 JB |
2629 | IS_BIG_ENDIAN is nonzero if the data is stored in big endian mode, |
2630 | zero otherwise. | |
14f9c5c9 | 2631 | |
f93fca70 | 2632 | IS_SIGNED_TYPE is nonzero if the data corresponds to a signed type. |
a1c95e6b | 2633 | |
f93fca70 JB |
2634 | IS_SCALAR is nonzero if the data corresponds to a signed type. */ |
2635 | ||
2636 | static void | |
2637 | ada_unpack_from_contents (const gdb_byte *src, int bit_offset, int bit_size, | |
2638 | gdb_byte *unpacked, int unpacked_len, | |
2639 | int is_big_endian, int is_signed_type, | |
2640 | int is_scalar) | |
2641 | { | |
a1c95e6b JB |
2642 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
2643 | int src_idx; /* Index into the source area */ | |
2644 | int src_bytes_left; /* Number of source bytes left to process. */ | |
2645 | int srcBitsLeft; /* Number of source bits left to move */ | |
2646 | int unusedLS; /* Number of bits in next significant | |
dda83cd7 | 2647 | byte of source that are unused */ |
a1c95e6b | 2648 | |
a1c95e6b JB |
2649 | int unpacked_idx; /* Index into the unpacked buffer */ |
2650 | int unpacked_bytes_left; /* Number of bytes left to set in unpacked. */ | |
2651 | ||
4c4b4cd2 | 2652 | unsigned long accum; /* Staging area for bits being transferred */ |
a1c95e6b | 2653 | int accumSize; /* Number of meaningful bits in accum */ |
14f9c5c9 | 2654 | unsigned char sign; |
a1c95e6b | 2655 | |
4c4b4cd2 PH |
2656 | /* Transmit bytes from least to most significant; delta is the direction |
2657 | the indices move. */ | |
f93fca70 | 2658 | int delta = is_big_endian ? -1 : 1; |
14f9c5c9 | 2659 | |
5b639dea JB |
2660 | /* Make sure that unpacked is large enough to receive the BIT_SIZE |
2661 | bits from SRC. .*/ | |
2662 | if ((bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT > unpacked_len) | |
2663 | error (_("Cannot unpack %d bits into buffer of %d bytes"), | |
2664 | bit_size, unpacked_len); | |
2665 | ||
14f9c5c9 | 2666 | srcBitsLeft = bit_size; |
086ca51f | 2667 | src_bytes_left = src_len; |
f93fca70 | 2668 | unpacked_bytes_left = unpacked_len; |
14f9c5c9 | 2669 | sign = 0; |
f93fca70 JB |
2670 | |
2671 | if (is_big_endian) | |
14f9c5c9 | 2672 | { |
086ca51f | 2673 | src_idx = src_len - 1; |
f93fca70 JB |
2674 | if (is_signed_type |
2675 | && ((src[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1)))) | |
dda83cd7 | 2676 | sign = ~0; |
d2e4a39e AS |
2677 | |
2678 | unusedLS = | |
dda83cd7 SM |
2679 | (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT) |
2680 | % HOST_CHAR_BIT; | |
14f9c5c9 | 2681 | |
f93fca70 JB |
2682 | if (is_scalar) |
2683 | { | |
dda83cd7 SM |
2684 | accumSize = 0; |
2685 | unpacked_idx = unpacked_len - 1; | |
f93fca70 JB |
2686 | } |
2687 | else | |
2688 | { | |
dda83cd7 SM |
2689 | /* Non-scalar values must be aligned at a byte boundary... */ |
2690 | accumSize = | |
2691 | (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT; | |
2692 | /* ... And are placed at the beginning (most-significant) bytes | |
2693 | of the target. */ | |
2694 | unpacked_idx = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1; | |
2695 | unpacked_bytes_left = unpacked_idx + 1; | |
f93fca70 | 2696 | } |
14f9c5c9 | 2697 | } |
d2e4a39e | 2698 | else |
14f9c5c9 AS |
2699 | { |
2700 | int sign_bit_offset = (bit_size + bit_offset - 1) % 8; | |
2701 | ||
086ca51f | 2702 | src_idx = unpacked_idx = 0; |
14f9c5c9 AS |
2703 | unusedLS = bit_offset; |
2704 | accumSize = 0; | |
2705 | ||
f93fca70 | 2706 | if (is_signed_type && (src[src_len - 1] & (1 << sign_bit_offset))) |
dda83cd7 | 2707 | sign = ~0; |
14f9c5c9 | 2708 | } |
d2e4a39e | 2709 | |
14f9c5c9 | 2710 | accum = 0; |
086ca51f | 2711 | while (src_bytes_left > 0) |
14f9c5c9 AS |
2712 | { |
2713 | /* Mask for removing bits of the next source byte that are not | |
dda83cd7 | 2714 | part of the value. */ |
d2e4a39e | 2715 | unsigned int unusedMSMask = |
dda83cd7 SM |
2716 | (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) - |
2717 | 1; | |
4c4b4cd2 | 2718 | /* Sign-extend bits for this byte. */ |
14f9c5c9 | 2719 | unsigned int signMask = sign & ~unusedMSMask; |
5b4ee69b | 2720 | |
d2e4a39e | 2721 | accum |= |
dda83cd7 | 2722 | (((src[src_idx] >> unusedLS) & unusedMSMask) | signMask) << accumSize; |
14f9c5c9 | 2723 | accumSize += HOST_CHAR_BIT - unusedLS; |
d2e4a39e | 2724 | if (accumSize >= HOST_CHAR_BIT) |
dda83cd7 SM |
2725 | { |
2726 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); | |
2727 | accumSize -= HOST_CHAR_BIT; | |
2728 | accum >>= HOST_CHAR_BIT; | |
2729 | unpacked_bytes_left -= 1; | |
2730 | unpacked_idx += delta; | |
2731 | } | |
14f9c5c9 AS |
2732 | srcBitsLeft -= HOST_CHAR_BIT - unusedLS; |
2733 | unusedLS = 0; | |
086ca51f JB |
2734 | src_bytes_left -= 1; |
2735 | src_idx += delta; | |
14f9c5c9 | 2736 | } |
086ca51f | 2737 | while (unpacked_bytes_left > 0) |
14f9c5c9 AS |
2738 | { |
2739 | accum |= sign << accumSize; | |
db297a65 | 2740 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); |
14f9c5c9 | 2741 | accumSize -= HOST_CHAR_BIT; |
9cd4d857 JB |
2742 | if (accumSize < 0) |
2743 | accumSize = 0; | |
14f9c5c9 | 2744 | accum >>= HOST_CHAR_BIT; |
086ca51f JB |
2745 | unpacked_bytes_left -= 1; |
2746 | unpacked_idx += delta; | |
14f9c5c9 | 2747 | } |
f93fca70 JB |
2748 | } |
2749 | ||
2750 | /* Create a new value of type TYPE from the contents of OBJ starting | |
2751 | at byte OFFSET, and bit offset BIT_OFFSET within that byte, | |
2752 | proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then | |
2753 | assigning through the result will set the field fetched from. | |
2754 | VALADDR is ignored unless OBJ is NULL, in which case, | |
2755 | VALADDR+OFFSET must address the start of storage containing the | |
2756 | packed value. The value returned in this case is never an lval. | |
2757 | Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */ | |
2758 | ||
2759 | struct value * | |
2760 | ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr, | |
2761 | long offset, int bit_offset, int bit_size, | |
dda83cd7 | 2762 | struct type *type) |
f93fca70 JB |
2763 | { |
2764 | struct value *v; | |
bfb1c796 | 2765 | const gdb_byte *src; /* First byte containing data to unpack */ |
f93fca70 | 2766 | gdb_byte *unpacked; |
220475ed | 2767 | const int is_scalar = is_scalar_type (type); |
d5a22e77 | 2768 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d5722aa2 | 2769 | gdb::byte_vector staging; |
f93fca70 JB |
2770 | |
2771 | type = ada_check_typedef (type); | |
2772 | ||
d0a9e810 | 2773 | if (obj == NULL) |
bfb1c796 | 2774 | src = valaddr + offset; |
d0a9e810 | 2775 | else |
50888e42 | 2776 | src = value_contents (obj).data () + offset; |
d0a9e810 JB |
2777 | |
2778 | if (is_dynamic_type (type)) | |
2779 | { | |
2780 | /* The length of TYPE might by dynamic, so we need to resolve | |
2781 | TYPE in order to know its actual size, which we then use | |
2782 | to create the contents buffer of the value we return. | |
2783 | The difficulty is that the data containing our object is | |
2784 | packed, and therefore maybe not at a byte boundary. So, what | |
2785 | we do, is unpack the data into a byte-aligned buffer, and then | |
2786 | use that buffer as our object's value for resolving the type. */ | |
d5722aa2 PA |
2787 | int staging_len = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
2788 | staging.resize (staging_len); | |
d0a9e810 JB |
2789 | |
2790 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
dda83cd7 | 2791 | staging.data (), staging.size (), |
d0a9e810 JB |
2792 | is_big_endian, has_negatives (type), |
2793 | is_scalar); | |
b249d2c2 | 2794 | type = resolve_dynamic_type (type, staging, 0); |
df86565b | 2795 | if (type->length () < (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT) |
0cafa88c JB |
2796 | { |
2797 | /* This happens when the length of the object is dynamic, | |
2798 | and is actually smaller than the space reserved for it. | |
2799 | For instance, in an array of variant records, the bit_size | |
2800 | we're given is the array stride, which is constant and | |
2801 | normally equal to the maximum size of its element. | |
2802 | But, in reality, each element only actually spans a portion | |
2803 | of that stride. */ | |
df86565b | 2804 | bit_size = type->length () * HOST_CHAR_BIT; |
0cafa88c | 2805 | } |
d0a9e810 JB |
2806 | } |
2807 | ||
f93fca70 JB |
2808 | if (obj == NULL) |
2809 | { | |
2810 | v = allocate_value (type); | |
bfb1c796 | 2811 | src = valaddr + offset; |
f93fca70 | 2812 | } |
3ee3b270 | 2813 | else if (VALUE_LVAL (obj) == lval_memory && obj->lazy ()) |
f93fca70 | 2814 | { |
0cafa88c | 2815 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
bfb1c796 | 2816 | gdb_byte *buf; |
0cafa88c | 2817 | |
9feb2d07 | 2818 | v = value_at (type, obj->address () + offset); |
bfb1c796 | 2819 | buf = (gdb_byte *) alloca (src_len); |
9feb2d07 | 2820 | read_memory (v->address (), buf, src_len); |
bfb1c796 | 2821 | src = buf; |
f93fca70 JB |
2822 | } |
2823 | else | |
2824 | { | |
2825 | v = allocate_value (type); | |
50888e42 | 2826 | src = value_contents (obj).data () + offset; |
f93fca70 JB |
2827 | } |
2828 | ||
2829 | if (obj != NULL) | |
2830 | { | |
2831 | long new_offset = offset; | |
2832 | ||
2833 | set_value_component_location (v, obj); | |
5011c493 | 2834 | v->set_bitpos (bit_offset + obj->bitpos ()); |
f49d5fa2 | 2835 | v->set_bitsize (bit_size); |
5011c493 | 2836 | if (v->bitpos () >= HOST_CHAR_BIT) |
dda83cd7 | 2837 | { |
f93fca70 | 2838 | ++new_offset; |
5011c493 | 2839 | v->set_bitpos (v->bitpos () - HOST_CHAR_BIT); |
dda83cd7 | 2840 | } |
76675c4d | 2841 | v->set_offset (new_offset); |
f93fca70 JB |
2842 | |
2843 | /* Also set the parent value. This is needed when trying to | |
2844 | assign a new value (in inferior memory). */ | |
fac7bdaa | 2845 | v->set_parent (obj); |
f93fca70 JB |
2846 | } |
2847 | else | |
f49d5fa2 | 2848 | v->set_bitsize (bit_size); |
50888e42 | 2849 | unpacked = value_contents_writeable (v).data (); |
f93fca70 JB |
2850 | |
2851 | if (bit_size == 0) | |
2852 | { | |
df86565b | 2853 | memset (unpacked, 0, type->length ()); |
f93fca70 JB |
2854 | return v; |
2855 | } | |
2856 | ||
df86565b | 2857 | if (staging.size () == type->length ()) |
f93fca70 | 2858 | { |
d0a9e810 JB |
2859 | /* Small short-cut: If we've unpacked the data into a buffer |
2860 | of the same size as TYPE's length, then we can reuse that, | |
2861 | instead of doing the unpacking again. */ | |
d5722aa2 | 2862 | memcpy (unpacked, staging.data (), staging.size ()); |
f93fca70 | 2863 | } |
d0a9e810 JB |
2864 | else |
2865 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
df86565b | 2866 | unpacked, type->length (), |
d0a9e810 | 2867 | is_big_endian, has_negatives (type), is_scalar); |
f93fca70 | 2868 | |
14f9c5c9 AS |
2869 | return v; |
2870 | } | |
d2e4a39e | 2871 | |
14f9c5c9 AS |
2872 | /* Store the contents of FROMVAL into the location of TOVAL. |
2873 | Return a new value with the location of TOVAL and contents of | |
2874 | FROMVAL. Handles assignment into packed fields that have | |
4c4b4cd2 | 2875 | floating-point or non-scalar types. */ |
14f9c5c9 | 2876 | |
d2e4a39e AS |
2877 | static struct value * |
2878 | ada_value_assign (struct value *toval, struct value *fromval) | |
14f9c5c9 | 2879 | { |
d0c97917 | 2880 | struct type *type = toval->type (); |
f49d5fa2 | 2881 | int bits = toval->bitsize (); |
14f9c5c9 | 2882 | |
52ce6436 PH |
2883 | toval = ada_coerce_ref (toval); |
2884 | fromval = ada_coerce_ref (fromval); | |
2885 | ||
d0c97917 | 2886 | if (ada_is_direct_array_type (toval->type ())) |
52ce6436 | 2887 | toval = ada_coerce_to_simple_array (toval); |
d0c97917 | 2888 | if (ada_is_direct_array_type (fromval->type ())) |
52ce6436 PH |
2889 | fromval = ada_coerce_to_simple_array (fromval); |
2890 | ||
4b53ca88 | 2891 | if (!toval->deprecated_modifiable ()) |
323e0a4a | 2892 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
14f9c5c9 | 2893 | |
d2e4a39e | 2894 | if (VALUE_LVAL (toval) == lval_memory |
14f9c5c9 | 2895 | && bits > 0 |
78134374 | 2896 | && (type->code () == TYPE_CODE_FLT |
dda83cd7 | 2897 | || type->code () == TYPE_CODE_STRUCT)) |
14f9c5c9 | 2898 | { |
5011c493 | 2899 | int len = (toval->bitpos () |
df407dfe | 2900 | + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
aced2898 | 2901 | int from_size; |
224c3ddb | 2902 | gdb_byte *buffer = (gdb_byte *) alloca (len); |
d2e4a39e | 2903 | struct value *val; |
9feb2d07 | 2904 | CORE_ADDR to_addr = toval->address (); |
14f9c5c9 | 2905 | |
78134374 | 2906 | if (type->code () == TYPE_CODE_FLT) |
dda83cd7 | 2907 | fromval = value_cast (type, fromval); |
14f9c5c9 | 2908 | |
52ce6436 | 2909 | read_memory (to_addr, buffer, len); |
f49d5fa2 | 2910 | from_size = fromval->bitsize (); |
aced2898 | 2911 | if (from_size == 0) |
d0c97917 | 2912 | from_size = fromval->type ()->length () * TARGET_CHAR_BIT; |
d48e62f4 | 2913 | |
d5a22e77 | 2914 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d48e62f4 | 2915 | ULONGEST from_offset = 0; |
d0c97917 | 2916 | if (is_big_endian && is_scalar_type (fromval->type ())) |
d48e62f4 | 2917 | from_offset = from_size - bits; |
5011c493 | 2918 | copy_bitwise (buffer, toval->bitpos (), |
50888e42 | 2919 | value_contents (fromval).data (), from_offset, |
d48e62f4 | 2920 | bits, is_big_endian); |
972daa01 | 2921 | write_memory_with_notification (to_addr, buffer, len); |
8cebebb9 | 2922 | |
14f9c5c9 | 2923 | val = value_copy (toval); |
fb2a515f SM |
2924 | memcpy (value_contents_raw (val).data (), |
2925 | value_contents (fromval).data (), | |
df86565b | 2926 | type->length ()); |
81ae560c | 2927 | val->deprecated_set_type (type); |
d2e4a39e | 2928 | |
14f9c5c9 AS |
2929 | return val; |
2930 | } | |
2931 | ||
2932 | return value_assign (toval, fromval); | |
2933 | } | |
2934 | ||
2935 | ||
7c512744 JB |
2936 | /* Given that COMPONENT is a memory lvalue that is part of the lvalue |
2937 | CONTAINER, assign the contents of VAL to COMPONENTS's place in | |
2938 | CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not | |
2939 | COMPONENT, and not the inferior's memory. The current contents | |
2940 | of COMPONENT are ignored. | |
2941 | ||
2942 | Although not part of the initial design, this function also works | |
2943 | when CONTAINER and COMPONENT are not_lval's: it works as if CONTAINER | |
2944 | had a null address, and COMPONENT had an address which is equal to | |
2945 | its offset inside CONTAINER. */ | |
2946 | ||
52ce6436 PH |
2947 | static void |
2948 | value_assign_to_component (struct value *container, struct value *component, | |
2949 | struct value *val) | |
2950 | { | |
2951 | LONGEST offset_in_container = | |
9feb2d07 | 2952 | (LONGEST) (component->address () - container->address ()); |
7c512744 | 2953 | int bit_offset_in_container = |
5011c493 | 2954 | component->bitpos () - container->bitpos (); |
52ce6436 | 2955 | int bits; |
7c512744 | 2956 | |
d0c97917 | 2957 | val = value_cast (component->type (), val); |
52ce6436 | 2958 | |
f49d5fa2 | 2959 | if (component->bitsize () == 0) |
d0c97917 | 2960 | bits = TARGET_CHAR_BIT * component->type ()->length (); |
52ce6436 | 2961 | else |
f49d5fa2 | 2962 | bits = component->bitsize (); |
52ce6436 | 2963 | |
d0c97917 | 2964 | if (type_byte_order (container->type ()) == BFD_ENDIAN_BIG) |
2a62dfa9 JB |
2965 | { |
2966 | int src_offset; | |
2967 | ||
d0c97917 | 2968 | if (is_scalar_type (check_typedef (component->type ()))) |
dda83cd7 | 2969 | src_offset |
d0c97917 | 2970 | = component->type ()->length () * TARGET_CHAR_BIT - bits; |
2a62dfa9 JB |
2971 | else |
2972 | src_offset = 0; | |
50888e42 SM |
2973 | copy_bitwise ((value_contents_writeable (container).data () |
2974 | + offset_in_container), | |
5011c493 | 2975 | container->bitpos () + bit_offset_in_container, |
50888e42 | 2976 | value_contents (val).data (), src_offset, bits, 1); |
2a62dfa9 | 2977 | } |
52ce6436 | 2978 | else |
50888e42 SM |
2979 | copy_bitwise ((value_contents_writeable (container).data () |
2980 | + offset_in_container), | |
5011c493 | 2981 | container->bitpos () + bit_offset_in_container, |
50888e42 | 2982 | value_contents (val).data (), 0, bits, 0); |
7c512744 JB |
2983 | } |
2984 | ||
736ade86 XR |
2985 | /* Determine if TYPE is an access to an unconstrained array. */ |
2986 | ||
d91e9ea8 | 2987 | bool |
736ade86 XR |
2988 | ada_is_access_to_unconstrained_array (struct type *type) |
2989 | { | |
78134374 | 2990 | return (type->code () == TYPE_CODE_TYPEDEF |
736ade86 XR |
2991 | && is_thick_pntr (ada_typedef_target_type (type))); |
2992 | } | |
2993 | ||
4c4b4cd2 PH |
2994 | /* The value of the element of array ARR at the ARITY indices given in IND. |
2995 | ARR may be either a simple array, GNAT array descriptor, or pointer | |
14f9c5c9 AS |
2996 | thereto. */ |
2997 | ||
d2e4a39e AS |
2998 | struct value * |
2999 | ada_value_subscript (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
3000 | { |
3001 | int k; | |
d2e4a39e AS |
3002 | struct value *elt; |
3003 | struct type *elt_type; | |
14f9c5c9 AS |
3004 | |
3005 | elt = ada_coerce_to_simple_array (arr); | |
3006 | ||
d0c97917 | 3007 | elt_type = ada_check_typedef (elt->type ()); |
78134374 | 3008 | if (elt_type->code () == TYPE_CODE_ARRAY |
14f9c5c9 AS |
3009 | && TYPE_FIELD_BITSIZE (elt_type, 0) > 0) |
3010 | return value_subscript_packed (elt, arity, ind); | |
3011 | ||
3012 | for (k = 0; k < arity; k += 1) | |
3013 | { | |
27710edb | 3014 | struct type *saved_elt_type = elt_type->target_type (); |
b9c50e9a | 3015 | |
78134374 | 3016 | if (elt_type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 3017 | error (_("too many subscripts (%d expected)"), k); |
b9c50e9a | 3018 | |
2497b498 | 3019 | elt = value_subscript (elt, pos_atr (ind[k])); |
b9c50e9a XR |
3020 | |
3021 | if (ada_is_access_to_unconstrained_array (saved_elt_type) | |
d0c97917 | 3022 | && elt->type ()->code () != TYPE_CODE_TYPEDEF) |
b9c50e9a XR |
3023 | { |
3024 | /* The element is a typedef to an unconstrained array, | |
3025 | except that the value_subscript call stripped the | |
3026 | typedef layer. The typedef layer is GNAT's way to | |
3027 | specify that the element is, at the source level, an | |
3028 | access to the unconstrained array, rather than the | |
3029 | unconstrained array. So, we need to restore that | |
3030 | typedef layer, which we can do by forcing the element's | |
3031 | type back to its original type. Otherwise, the returned | |
3032 | value is going to be printed as the array, rather | |
3033 | than as an access. Another symptom of the same issue | |
3034 | would be that an expression trying to dereference the | |
3035 | element would also be improperly rejected. */ | |
81ae560c | 3036 | elt->deprecated_set_type (saved_elt_type); |
b9c50e9a XR |
3037 | } |
3038 | ||
d0c97917 | 3039 | elt_type = ada_check_typedef (elt->type ()); |
14f9c5c9 | 3040 | } |
b9c50e9a | 3041 | |
14f9c5c9 AS |
3042 | return elt; |
3043 | } | |
3044 | ||
deede10c JB |
3045 | /* Assuming ARR is a pointer to a GDB array, the value of the element |
3046 | of *ARR at the ARITY indices given in IND. | |
919e6dbe PMR |
3047 | Does not read the entire array into memory. |
3048 | ||
3049 | Note: Unlike what one would expect, this function is used instead of | |
3050 | ada_value_subscript for basically all non-packed array types. The reason | |
3051 | for this is that a side effect of doing our own pointer arithmetics instead | |
3052 | of relying on value_subscript is that there is no implicit typedef peeling. | |
3053 | This is important for arrays of array accesses, where it allows us to | |
3054 | preserve the fact that the array's element is an array access, where the | |
3055 | access part os encoded in a typedef layer. */ | |
14f9c5c9 | 3056 | |
2c0b251b | 3057 | static struct value * |
deede10c | 3058 | ada_value_ptr_subscript (struct value *arr, int arity, struct value **ind) |
14f9c5c9 AS |
3059 | { |
3060 | int k; | |
919e6dbe | 3061 | struct value *array_ind = ada_value_ind (arr); |
deede10c | 3062 | struct type *type |
463b870d | 3063 | = check_typedef (array_ind->enclosing_type ()); |
919e6dbe | 3064 | |
78134374 | 3065 | if (type->code () == TYPE_CODE_ARRAY |
919e6dbe PMR |
3066 | && TYPE_FIELD_BITSIZE (type, 0) > 0) |
3067 | return value_subscript_packed (array_ind, arity, ind); | |
14f9c5c9 AS |
3068 | |
3069 | for (k = 0; k < arity; k += 1) | |
3070 | { | |
3071 | LONGEST lwb, upb; | |
14f9c5c9 | 3072 | |
78134374 | 3073 | if (type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 3074 | error (_("too many subscripts (%d expected)"), k); |
27710edb | 3075 | arr = value_cast (lookup_pointer_type (type->target_type ()), |
dda83cd7 | 3076 | value_copy (arr)); |
3d967001 | 3077 | get_discrete_bounds (type->index_type (), &lwb, &upb); |
53a47a3e | 3078 | arr = value_ptradd (arr, pos_atr (ind[k]) - lwb); |
27710edb | 3079 | type = type->target_type (); |
14f9c5c9 AS |
3080 | } |
3081 | ||
3082 | return value_ind (arr); | |
3083 | } | |
3084 | ||
0b5d8877 | 3085 | /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the |
aa715135 JG |
3086 | actual type of ARRAY_PTR is ignored), returns the Ada slice of |
3087 | HIGH'Pos-LOW'Pos+1 elements starting at index LOW. The lower bound of | |
3088 | this array is LOW, as per Ada rules. */ | |
0b5d8877 | 3089 | static struct value * |
f5938064 | 3090 | ada_value_slice_from_ptr (struct value *array_ptr, struct type *type, |
dda83cd7 | 3091 | int low, int high) |
0b5d8877 | 3092 | { |
b0dd7688 | 3093 | struct type *type0 = ada_check_typedef (type); |
27710edb | 3094 | struct type *base_index_type = type0->index_type ()->target_type (); |
0c9c3474 | 3095 | struct type *index_type |
aa715135 | 3096 | = create_static_range_type (NULL, base_index_type, low, high); |
9fe561ab | 3097 | struct type *slice_type = create_array_type_with_stride |
27710edb | 3098 | (NULL, type0->target_type (), index_type, |
24e99c6c | 3099 | type0->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 3100 | TYPE_FIELD_BITSIZE (type0, 0)); |
3d967001 | 3101 | int base_low = ada_discrete_type_low_bound (type0->index_type ()); |
6244c119 | 3102 | gdb::optional<LONGEST> base_low_pos, low_pos; |
aa715135 JG |
3103 | CORE_ADDR base; |
3104 | ||
6244c119 SM |
3105 | low_pos = discrete_position (base_index_type, low); |
3106 | base_low_pos = discrete_position (base_index_type, base_low); | |
3107 | ||
3108 | if (!low_pos.has_value () || !base_low_pos.has_value ()) | |
aa715135 JG |
3109 | { |
3110 | warning (_("unable to get positions in slice, use bounds instead")); | |
3111 | low_pos = low; | |
3112 | base_low_pos = base_low; | |
3113 | } | |
5b4ee69b | 3114 | |
7ff5b937 TT |
3115 | ULONGEST stride = TYPE_FIELD_BITSIZE (slice_type, 0) / 8; |
3116 | if (stride == 0) | |
df86565b | 3117 | stride = type0->target_type ()->length (); |
7ff5b937 | 3118 | |
6244c119 | 3119 | base = value_as_address (array_ptr) + (*low_pos - *base_low_pos) * stride; |
f5938064 | 3120 | return value_at_lazy (slice_type, base); |
0b5d8877 PH |
3121 | } |
3122 | ||
3123 | ||
3124 | static struct value * | |
3125 | ada_value_slice (struct value *array, int low, int high) | |
3126 | { | |
d0c97917 | 3127 | struct type *type = ada_check_typedef (array->type ()); |
27710edb | 3128 | struct type *base_index_type = type->index_type ()->target_type (); |
0c9c3474 | 3129 | struct type *index_type |
3d967001 | 3130 | = create_static_range_type (NULL, type->index_type (), low, high); |
9fe561ab | 3131 | struct type *slice_type = create_array_type_with_stride |
27710edb | 3132 | (NULL, type->target_type (), index_type, |
24e99c6c | 3133 | type->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 3134 | TYPE_FIELD_BITSIZE (type, 0)); |
6244c119 SM |
3135 | gdb::optional<LONGEST> low_pos, high_pos; |
3136 | ||
5b4ee69b | 3137 | |
6244c119 SM |
3138 | low_pos = discrete_position (base_index_type, low); |
3139 | high_pos = discrete_position (base_index_type, high); | |
3140 | ||
3141 | if (!low_pos.has_value () || !high_pos.has_value ()) | |
aa715135 JG |
3142 | { |
3143 | warning (_("unable to get positions in slice, use bounds instead")); | |
3144 | low_pos = low; | |
3145 | high_pos = high; | |
3146 | } | |
3147 | ||
3148 | return value_cast (slice_type, | |
6244c119 | 3149 | value_slice (array, low, *high_pos - *low_pos + 1)); |
0b5d8877 PH |
3150 | } |
3151 | ||
14f9c5c9 AS |
3152 | /* If type is a record type in the form of a standard GNAT array |
3153 | descriptor, returns the number of dimensions for type. If arr is a | |
3154 | simple array, returns the number of "array of"s that prefix its | |
4c4b4cd2 | 3155 | type designation. Otherwise, returns 0. */ |
14f9c5c9 AS |
3156 | |
3157 | int | |
d2e4a39e | 3158 | ada_array_arity (struct type *type) |
14f9c5c9 AS |
3159 | { |
3160 | int arity; | |
3161 | ||
3162 | if (type == NULL) | |
3163 | return 0; | |
3164 | ||
3165 | type = desc_base_type (type); | |
3166 | ||
3167 | arity = 0; | |
78134374 | 3168 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 | 3169 | return desc_arity (desc_bounds_type (type)); |
d2e4a39e | 3170 | else |
78134374 | 3171 | while (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 3172 | { |
dda83cd7 | 3173 | arity += 1; |
27710edb | 3174 | type = ada_check_typedef (type->target_type ()); |
14f9c5c9 | 3175 | } |
d2e4a39e | 3176 | |
14f9c5c9 AS |
3177 | return arity; |
3178 | } | |
3179 | ||
3180 | /* If TYPE is a record type in the form of a standard GNAT array | |
3181 | descriptor or a simple array type, returns the element type for | |
3182 | TYPE after indexing by NINDICES indices, or by all indices if | |
4c4b4cd2 | 3183 | NINDICES is -1. Otherwise, returns NULL. */ |
14f9c5c9 | 3184 | |
d2e4a39e AS |
3185 | struct type * |
3186 | ada_array_element_type (struct type *type, int nindices) | |
14f9c5c9 AS |
3187 | { |
3188 | type = desc_base_type (type); | |
3189 | ||
78134374 | 3190 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
3191 | { |
3192 | int k; | |
d2e4a39e | 3193 | struct type *p_array_type; |
14f9c5c9 | 3194 | |
556bdfd4 | 3195 | p_array_type = desc_data_target_type (type); |
14f9c5c9 AS |
3196 | |
3197 | k = ada_array_arity (type); | |
3198 | if (k == 0) | |
dda83cd7 | 3199 | return NULL; |
d2e4a39e | 3200 | |
4c4b4cd2 | 3201 | /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */ |
14f9c5c9 | 3202 | if (nindices >= 0 && k > nindices) |
dda83cd7 | 3203 | k = nindices; |
d2e4a39e | 3204 | while (k > 0 && p_array_type != NULL) |
dda83cd7 | 3205 | { |
27710edb | 3206 | p_array_type = ada_check_typedef (p_array_type->target_type ()); |
dda83cd7 SM |
3207 | k -= 1; |
3208 | } | |
14f9c5c9 AS |
3209 | return p_array_type; |
3210 | } | |
78134374 | 3211 | else if (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 3212 | { |
78134374 | 3213 | while (nindices != 0 && type->code () == TYPE_CODE_ARRAY) |
dda83cd7 | 3214 | { |
27710edb | 3215 | type = type->target_type (); |
6a40c6e4 TT |
3216 | /* A multi-dimensional array is represented using a sequence |
3217 | of array types. If one of these types has a name, then | |
3218 | it is not another dimension of the outer array, but | |
3219 | rather the element type of the outermost array. */ | |
3220 | if (type->name () != nullptr) | |
3221 | break; | |
dda83cd7 SM |
3222 | nindices -= 1; |
3223 | } | |
14f9c5c9 AS |
3224 | return type; |
3225 | } | |
3226 | ||
3227 | return NULL; | |
3228 | } | |
3229 | ||
08a057e6 | 3230 | /* See ada-lang.h. */ |
14f9c5c9 | 3231 | |
08a057e6 | 3232 | struct type * |
1eea4ebd | 3233 | ada_index_type (struct type *type, int n, const char *name) |
14f9c5c9 | 3234 | { |
4c4b4cd2 PH |
3235 | struct type *result_type; |
3236 | ||
14f9c5c9 AS |
3237 | type = desc_base_type (type); |
3238 | ||
1eea4ebd UW |
3239 | if (n < 0 || n > ada_array_arity (type)) |
3240 | error (_("invalid dimension number to '%s"), name); | |
14f9c5c9 | 3241 | |
4c4b4cd2 | 3242 | if (ada_is_simple_array_type (type)) |
14f9c5c9 AS |
3243 | { |
3244 | int i; | |
3245 | ||
3246 | for (i = 1; i < n; i += 1) | |
2869ac4b TT |
3247 | { |
3248 | type = ada_check_typedef (type); | |
27710edb | 3249 | type = type->target_type (); |
2869ac4b | 3250 | } |
27710edb | 3251 | result_type = ada_check_typedef (type)->index_type ()->target_type (); |
4c4b4cd2 | 3252 | /* FIXME: The stabs type r(0,0);bound;bound in an array type |
dda83cd7 SM |
3253 | has a target type of TYPE_CODE_UNDEF. We compensate here, but |
3254 | perhaps stabsread.c would make more sense. */ | |
78134374 | 3255 | if (result_type && result_type->code () == TYPE_CODE_UNDEF) |
dda83cd7 | 3256 | result_type = NULL; |
14f9c5c9 | 3257 | } |
d2e4a39e | 3258 | else |
1eea4ebd UW |
3259 | { |
3260 | result_type = desc_index_type (desc_bounds_type (type), n); | |
3261 | if (result_type == NULL) | |
3262 | error (_("attempt to take bound of something that is not an array")); | |
3263 | } | |
3264 | ||
3265 | return result_type; | |
14f9c5c9 AS |
3266 | } |
3267 | ||
3268 | /* Given that arr is an array type, returns the lower bound of the | |
3269 | Nth index (numbering from 1) if WHICH is 0, and the upper bound if | |
4c4b4cd2 | 3270 | WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an |
1eea4ebd UW |
3271 | array-descriptor type. It works for other arrays with bounds supplied |
3272 | by run-time quantities other than discriminants. */ | |
14f9c5c9 | 3273 | |
abb68b3e | 3274 | static LONGEST |
fb5e3d5c | 3275 | ada_array_bound_from_type (struct type *arr_type, int n, int which) |
14f9c5c9 | 3276 | { |
8a48ac95 | 3277 | struct type *type, *index_type_desc, *index_type; |
1ce677a4 | 3278 | int i; |
262452ec JK |
3279 | |
3280 | gdb_assert (which == 0 || which == 1); | |
14f9c5c9 | 3281 | |
ad82864c JB |
3282 | if (ada_is_constrained_packed_array_type (arr_type)) |
3283 | arr_type = decode_constrained_packed_array_type (arr_type); | |
14f9c5c9 | 3284 | |
4c4b4cd2 | 3285 | if (arr_type == NULL || !ada_is_simple_array_type (arr_type)) |
1eea4ebd | 3286 | return (LONGEST) - which; |
14f9c5c9 | 3287 | |
78134374 | 3288 | if (arr_type->code () == TYPE_CODE_PTR) |
27710edb | 3289 | type = arr_type->target_type (); |
14f9c5c9 AS |
3290 | else |
3291 | type = arr_type; | |
3292 | ||
22c4c60c | 3293 | if (type->is_fixed_instance ()) |
bafffb51 JB |
3294 | { |
3295 | /* The array has already been fixed, so we do not need to | |
3296 | check the parallel ___XA type again. That encoding has | |
3297 | already been applied, so ignore it now. */ | |
3298 | index_type_desc = NULL; | |
3299 | } | |
3300 | else | |
3301 | { | |
3302 | index_type_desc = ada_find_parallel_type (type, "___XA"); | |
3303 | ada_fixup_array_indexes_type (index_type_desc); | |
3304 | } | |
3305 | ||
262452ec | 3306 | if (index_type_desc != NULL) |
940da03e | 3307 | index_type = to_fixed_range_type (index_type_desc->field (n - 1).type (), |
28c85d6c | 3308 | NULL); |
262452ec | 3309 | else |
8a48ac95 JB |
3310 | { |
3311 | struct type *elt_type = check_typedef (type); | |
3312 | ||
3313 | for (i = 1; i < n; i++) | |
27710edb | 3314 | elt_type = check_typedef (elt_type->target_type ()); |
8a48ac95 | 3315 | |
3d967001 | 3316 | index_type = elt_type->index_type (); |
8a48ac95 | 3317 | } |
262452ec | 3318 | |
43bbcdc2 PH |
3319 | return |
3320 | (LONGEST) (which == 0 | |
dda83cd7 SM |
3321 | ? ada_discrete_type_low_bound (index_type) |
3322 | : ada_discrete_type_high_bound (index_type)); | |
14f9c5c9 AS |
3323 | } |
3324 | ||
3325 | /* Given that arr is an array value, returns the lower bound of the | |
abb68b3e JB |
3326 | nth index (numbering from 1) if WHICH is 0, and the upper bound if |
3327 | WHICH is 1. This routine will also work for arrays with bounds | |
4c4b4cd2 | 3328 | supplied by run-time quantities other than discriminants. */ |
14f9c5c9 | 3329 | |
1eea4ebd | 3330 | static LONGEST |
4dc81987 | 3331 | ada_array_bound (struct value *arr, int n, int which) |
14f9c5c9 | 3332 | { |
eb479039 JB |
3333 | struct type *arr_type; |
3334 | ||
d0c97917 | 3335 | if (check_typedef (arr->type ())->code () == TYPE_CODE_PTR) |
eb479039 | 3336 | arr = value_ind (arr); |
463b870d | 3337 | arr_type = arr->enclosing_type (); |
14f9c5c9 | 3338 | |
ad82864c JB |
3339 | if (ada_is_constrained_packed_array_type (arr_type)) |
3340 | return ada_array_bound (decode_constrained_packed_array (arr), n, which); | |
4c4b4cd2 | 3341 | else if (ada_is_simple_array_type (arr_type)) |
1eea4ebd | 3342 | return ada_array_bound_from_type (arr_type, n, which); |
14f9c5c9 | 3343 | else |
1eea4ebd | 3344 | return value_as_long (desc_one_bound (desc_bounds (arr), n, which)); |
14f9c5c9 AS |
3345 | } |
3346 | ||
3347 | /* Given that arr is an array value, returns the length of the | |
3348 | nth index. This routine will also work for arrays with bounds | |
4c4b4cd2 PH |
3349 | supplied by run-time quantities other than discriminants. |
3350 | Does not work for arrays indexed by enumeration types with representation | |
3351 | clauses at the moment. */ | |
14f9c5c9 | 3352 | |
1eea4ebd | 3353 | static LONGEST |
d2e4a39e | 3354 | ada_array_length (struct value *arr, int n) |
14f9c5c9 | 3355 | { |
aa715135 JG |
3356 | struct type *arr_type, *index_type; |
3357 | int low, high; | |
eb479039 | 3358 | |
d0c97917 | 3359 | if (check_typedef (arr->type ())->code () == TYPE_CODE_PTR) |
eb479039 | 3360 | arr = value_ind (arr); |
463b870d | 3361 | arr_type = arr->enclosing_type (); |
14f9c5c9 | 3362 | |
ad82864c JB |
3363 | if (ada_is_constrained_packed_array_type (arr_type)) |
3364 | return ada_array_length (decode_constrained_packed_array (arr), n); | |
14f9c5c9 | 3365 | |
4c4b4cd2 | 3366 | if (ada_is_simple_array_type (arr_type)) |
aa715135 JG |
3367 | { |
3368 | low = ada_array_bound_from_type (arr_type, n, 0); | |
3369 | high = ada_array_bound_from_type (arr_type, n, 1); | |
3370 | } | |
14f9c5c9 | 3371 | else |
aa715135 JG |
3372 | { |
3373 | low = value_as_long (desc_one_bound (desc_bounds (arr), n, 0)); | |
3374 | high = value_as_long (desc_one_bound (desc_bounds (arr), n, 1)); | |
3375 | } | |
3376 | ||
f168693b | 3377 | arr_type = check_typedef (arr_type); |
7150d33c | 3378 | index_type = ada_index_type (arr_type, n, "length"); |
aa715135 JG |
3379 | if (index_type != NULL) |
3380 | { | |
3381 | struct type *base_type; | |
78134374 | 3382 | if (index_type->code () == TYPE_CODE_RANGE) |
27710edb | 3383 | base_type = index_type->target_type (); |
aa715135 JG |
3384 | else |
3385 | base_type = index_type; | |
3386 | ||
3387 | low = pos_atr (value_from_longest (base_type, low)); | |
3388 | high = pos_atr (value_from_longest (base_type, high)); | |
3389 | } | |
3390 | return high - low + 1; | |
4c4b4cd2 PH |
3391 | } |
3392 | ||
bff8c71f TT |
3393 | /* An array whose type is that of ARR_TYPE (an array type), with |
3394 | bounds LOW to HIGH, but whose contents are unimportant. If HIGH is | |
3395 | less than LOW, then LOW-1 is used. */ | |
4c4b4cd2 PH |
3396 | |
3397 | static struct value * | |
bff8c71f | 3398 | empty_array (struct type *arr_type, int low, int high) |
4c4b4cd2 | 3399 | { |
b0dd7688 | 3400 | struct type *arr_type0 = ada_check_typedef (arr_type); |
0c9c3474 SA |
3401 | struct type *index_type |
3402 | = create_static_range_type | |
27710edb | 3403 | (NULL, arr_type0->index_type ()->target_type (), low, |
bff8c71f | 3404 | high < low ? low - 1 : high); |
b0dd7688 | 3405 | struct type *elt_type = ada_array_element_type (arr_type0, 1); |
5b4ee69b | 3406 | |
0b5d8877 | 3407 | return allocate_value (create_array_type (NULL, elt_type, index_type)); |
14f9c5c9 | 3408 | } |
14f9c5c9 | 3409 | \f |
d2e4a39e | 3410 | |
dda83cd7 | 3411 | /* Name resolution */ |
14f9c5c9 | 3412 | |
4c4b4cd2 PH |
3413 | /* The "decoded" name for the user-definable Ada operator corresponding |
3414 | to OP. */ | |
14f9c5c9 | 3415 | |
d2e4a39e | 3416 | static const char * |
4c4b4cd2 | 3417 | ada_decoded_op_name (enum exp_opcode op) |
14f9c5c9 AS |
3418 | { |
3419 | int i; | |
3420 | ||
4c4b4cd2 | 3421 | for (i = 0; ada_opname_table[i].encoded != NULL; i += 1) |
14f9c5c9 AS |
3422 | { |
3423 | if (ada_opname_table[i].op == op) | |
dda83cd7 | 3424 | return ada_opname_table[i].decoded; |
14f9c5c9 | 3425 | } |
323e0a4a | 3426 | error (_("Could not find operator name for opcode")); |
14f9c5c9 AS |
3427 | } |
3428 | ||
de93309a SM |
3429 | /* Returns true (non-zero) iff decoded name N0 should appear before N1 |
3430 | in a listing of choices during disambiguation (see sort_choices, below). | |
3431 | The idea is that overloadings of a subprogram name from the | |
3432 | same package should sort in their source order. We settle for ordering | |
3433 | such symbols by their trailing number (__N or $N). */ | |
14f9c5c9 | 3434 | |
de93309a SM |
3435 | static int |
3436 | encoded_ordered_before (const char *N0, const char *N1) | |
14f9c5c9 | 3437 | { |
de93309a SM |
3438 | if (N1 == NULL) |
3439 | return 0; | |
3440 | else if (N0 == NULL) | |
3441 | return 1; | |
3442 | else | |
3443 | { | |
3444 | int k0, k1; | |
30b15541 | 3445 | |
de93309a | 3446 | for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1) |
dda83cd7 | 3447 | ; |
de93309a | 3448 | for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1) |
dda83cd7 | 3449 | ; |
de93309a | 3450 | if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000' |
dda83cd7 SM |
3451 | && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000') |
3452 | { | |
3453 | int n0, n1; | |
3454 | ||
3455 | n0 = k0; | |
3456 | while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_') | |
3457 | n0 -= 1; | |
3458 | n1 = k1; | |
3459 | while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_') | |
3460 | n1 -= 1; | |
3461 | if (n0 == n1 && strncmp (N0, N1, n0) == 0) | |
3462 | return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1)); | |
3463 | } | |
de93309a SM |
3464 | return (strcmp (N0, N1) < 0); |
3465 | } | |
14f9c5c9 AS |
3466 | } |
3467 | ||
de93309a SM |
3468 | /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the |
3469 | encoded names. */ | |
14f9c5c9 | 3470 | |
de93309a SM |
3471 | static void |
3472 | sort_choices (struct block_symbol syms[], int nsyms) | |
14f9c5c9 | 3473 | { |
14f9c5c9 | 3474 | int i; |
14f9c5c9 | 3475 | |
de93309a | 3476 | for (i = 1; i < nsyms; i += 1) |
14f9c5c9 | 3477 | { |
de93309a SM |
3478 | struct block_symbol sym = syms[i]; |
3479 | int j; | |
3480 | ||
3481 | for (j = i - 1; j >= 0; j -= 1) | |
dda83cd7 SM |
3482 | { |
3483 | if (encoded_ordered_before (syms[j].symbol->linkage_name (), | |
3484 | sym.symbol->linkage_name ())) | |
3485 | break; | |
3486 | syms[j + 1] = syms[j]; | |
3487 | } | |
de93309a SM |
3488 | syms[j + 1] = sym; |
3489 | } | |
3490 | } | |
14f9c5c9 | 3491 | |
de93309a SM |
3492 | /* Whether GDB should display formals and return types for functions in the |
3493 | overloads selection menu. */ | |
3494 | static bool print_signatures = true; | |
4c4b4cd2 | 3495 | |
de93309a SM |
3496 | /* Print the signature for SYM on STREAM according to the FLAGS options. For |
3497 | all but functions, the signature is just the name of the symbol. For | |
3498 | functions, this is the name of the function, the list of types for formals | |
3499 | and the return type (if any). */ | |
4c4b4cd2 | 3500 | |
de93309a SM |
3501 | static void |
3502 | ada_print_symbol_signature (struct ui_file *stream, struct symbol *sym, | |
3503 | const struct type_print_options *flags) | |
3504 | { | |
5f9c5a63 | 3505 | struct type *type = sym->type (); |
14f9c5c9 | 3506 | |
6cb06a8c | 3507 | gdb_printf (stream, "%s", sym->print_name ()); |
de93309a SM |
3508 | if (!print_signatures |
3509 | || type == NULL | |
78134374 | 3510 | || type->code () != TYPE_CODE_FUNC) |
de93309a | 3511 | return; |
4c4b4cd2 | 3512 | |
1f704f76 | 3513 | if (type->num_fields () > 0) |
de93309a SM |
3514 | { |
3515 | int i; | |
14f9c5c9 | 3516 | |
6cb06a8c | 3517 | gdb_printf (stream, " ("); |
1f704f76 | 3518 | for (i = 0; i < type->num_fields (); ++i) |
de93309a SM |
3519 | { |
3520 | if (i > 0) | |
6cb06a8c | 3521 | gdb_printf (stream, "; "); |
940da03e | 3522 | ada_print_type (type->field (i).type (), NULL, stream, -1, 0, |
de93309a SM |
3523 | flags); |
3524 | } | |
6cb06a8c | 3525 | gdb_printf (stream, ")"); |
de93309a | 3526 | } |
27710edb SM |
3527 | if (type->target_type () != NULL |
3528 | && type->target_type ()->code () != TYPE_CODE_VOID) | |
de93309a | 3529 | { |
6cb06a8c | 3530 | gdb_printf (stream, " return "); |
27710edb | 3531 | ada_print_type (type->target_type (), NULL, stream, -1, 0, flags); |
de93309a SM |
3532 | } |
3533 | } | |
14f9c5c9 | 3534 | |
de93309a SM |
3535 | /* Read and validate a set of numeric choices from the user in the |
3536 | range 0 .. N_CHOICES-1. Place the results in increasing | |
3537 | order in CHOICES[0 .. N-1], and return N. | |
14f9c5c9 | 3538 | |
de93309a SM |
3539 | The user types choices as a sequence of numbers on one line |
3540 | separated by blanks, encoding them as follows: | |
14f9c5c9 | 3541 | |
de93309a SM |
3542 | + A choice of 0 means to cancel the selection, throwing an error. |
3543 | + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1. | |
3544 | + The user chooses k by typing k+IS_ALL_CHOICE+1. | |
14f9c5c9 | 3545 | |
de93309a | 3546 | The user is not allowed to choose more than MAX_RESULTS values. |
14f9c5c9 | 3547 | |
de93309a SM |
3548 | ANNOTATION_SUFFIX, if present, is used to annotate the input |
3549 | prompts (for use with the -f switch). */ | |
14f9c5c9 | 3550 | |
de93309a SM |
3551 | static int |
3552 | get_selections (int *choices, int n_choices, int max_results, | |
dda83cd7 | 3553 | int is_all_choice, const char *annotation_suffix) |
de93309a | 3554 | { |
992a7040 | 3555 | const char *args; |
de93309a SM |
3556 | const char *prompt; |
3557 | int n_chosen; | |
3558 | int first_choice = is_all_choice ? 2 : 1; | |
14f9c5c9 | 3559 | |
de93309a SM |
3560 | prompt = getenv ("PS2"); |
3561 | if (prompt == NULL) | |
3562 | prompt = "> "; | |
4c4b4cd2 | 3563 | |
f8631e5e SM |
3564 | std::string buffer; |
3565 | args = command_line_input (buffer, prompt, annotation_suffix); | |
4c4b4cd2 | 3566 | |
de93309a SM |
3567 | if (args == NULL) |
3568 | error_no_arg (_("one or more choice numbers")); | |
14f9c5c9 | 3569 | |
de93309a | 3570 | n_chosen = 0; |
4c4b4cd2 | 3571 | |
de93309a SM |
3572 | /* Set choices[0 .. n_chosen-1] to the users' choices in ascending |
3573 | order, as given in args. Choices are validated. */ | |
3574 | while (1) | |
14f9c5c9 | 3575 | { |
de93309a SM |
3576 | char *args2; |
3577 | int choice, j; | |
76a01679 | 3578 | |
de93309a SM |
3579 | args = skip_spaces (args); |
3580 | if (*args == '\0' && n_chosen == 0) | |
dda83cd7 | 3581 | error_no_arg (_("one or more choice numbers")); |
de93309a | 3582 | else if (*args == '\0') |
dda83cd7 | 3583 | break; |
76a01679 | 3584 | |
de93309a SM |
3585 | choice = strtol (args, &args2, 10); |
3586 | if (args == args2 || choice < 0 | |
dda83cd7 SM |
3587 | || choice > n_choices + first_choice - 1) |
3588 | error (_("Argument must be choice number")); | |
de93309a | 3589 | args = args2; |
76a01679 | 3590 | |
de93309a | 3591 | if (choice == 0) |
dda83cd7 | 3592 | error (_("cancelled")); |
76a01679 | 3593 | |
de93309a | 3594 | if (choice < first_choice) |
dda83cd7 SM |
3595 | { |
3596 | n_chosen = n_choices; | |
3597 | for (j = 0; j < n_choices; j += 1) | |
3598 | choices[j] = j; | |
3599 | break; | |
3600 | } | |
de93309a | 3601 | choice -= first_choice; |
76a01679 | 3602 | |
de93309a | 3603 | for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1) |
dda83cd7 SM |
3604 | { |
3605 | } | |
4c4b4cd2 | 3606 | |
de93309a | 3607 | if (j < 0 || choice != choices[j]) |
dda83cd7 SM |
3608 | { |
3609 | int k; | |
4c4b4cd2 | 3610 | |
dda83cd7 SM |
3611 | for (k = n_chosen - 1; k > j; k -= 1) |
3612 | choices[k + 1] = choices[k]; | |
3613 | choices[j + 1] = choice; | |
3614 | n_chosen += 1; | |
3615 | } | |
14f9c5c9 AS |
3616 | } |
3617 | ||
de93309a SM |
3618 | if (n_chosen > max_results) |
3619 | error (_("Select no more than %d of the above"), max_results); | |
3620 | ||
3621 | return n_chosen; | |
14f9c5c9 AS |
3622 | } |
3623 | ||
de93309a SM |
3624 | /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0 |
3625 | by asking the user (if necessary), returning the number selected, | |
3626 | and setting the first elements of SYMS items. Error if no symbols | |
3627 | selected. */ | |
3628 | ||
3629 | /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought | |
3630 | to be re-integrated one of these days. */ | |
14f9c5c9 AS |
3631 | |
3632 | static int | |
de93309a | 3633 | user_select_syms (struct block_symbol *syms, int nsyms, int max_results) |
14f9c5c9 | 3634 | { |
de93309a SM |
3635 | int i; |
3636 | int *chosen = XALLOCAVEC (int , nsyms); | |
3637 | int n_chosen; | |
3638 | int first_choice = (max_results == 1) ? 1 : 2; | |
3639 | const char *select_mode = multiple_symbols_select_mode (); | |
14f9c5c9 | 3640 | |
de93309a SM |
3641 | if (max_results < 1) |
3642 | error (_("Request to select 0 symbols!")); | |
3643 | if (nsyms <= 1) | |
3644 | return nsyms; | |
14f9c5c9 | 3645 | |
de93309a SM |
3646 | if (select_mode == multiple_symbols_cancel) |
3647 | error (_("\ | |
3648 | canceled because the command is ambiguous\n\ | |
3649 | See set/show multiple-symbol.")); | |
14f9c5c9 | 3650 | |
de93309a SM |
3651 | /* If select_mode is "all", then return all possible symbols. |
3652 | Only do that if more than one symbol can be selected, of course. | |
3653 | Otherwise, display the menu as usual. */ | |
3654 | if (select_mode == multiple_symbols_all && max_results > 1) | |
3655 | return nsyms; | |
14f9c5c9 | 3656 | |
6cb06a8c | 3657 | gdb_printf (_("[0] cancel\n")); |
de93309a | 3658 | if (max_results > 1) |
6cb06a8c | 3659 | gdb_printf (_("[1] all\n")); |
14f9c5c9 | 3660 | |
de93309a | 3661 | sort_choices (syms, nsyms); |
14f9c5c9 | 3662 | |
de93309a SM |
3663 | for (i = 0; i < nsyms; i += 1) |
3664 | { | |
3665 | if (syms[i].symbol == NULL) | |
dda83cd7 | 3666 | continue; |
14f9c5c9 | 3667 | |
66d7f48f | 3668 | if (syms[i].symbol->aclass () == LOC_BLOCK) |
dda83cd7 SM |
3669 | { |
3670 | struct symtab_and_line sal = | |
3671 | find_function_start_sal (syms[i].symbol, 1); | |
14f9c5c9 | 3672 | |
6cb06a8c | 3673 | gdb_printf ("[%d] ", i + first_choice); |
de93309a SM |
3674 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, |
3675 | &type_print_raw_options); | |
3676 | if (sal.symtab == NULL) | |
6cb06a8c TT |
3677 | gdb_printf (_(" at %p[<no source file available>%p]:%d\n"), |
3678 | metadata_style.style ().ptr (), nullptr, sal.line); | |
de93309a | 3679 | else |
6cb06a8c | 3680 | gdb_printf |
de93309a SM |
3681 | (_(" at %ps:%d\n"), |
3682 | styled_string (file_name_style.style (), | |
3683 | symtab_to_filename_for_display (sal.symtab)), | |
3684 | sal.line); | |
dda83cd7 SM |
3685 | continue; |
3686 | } | |
76a01679 | 3687 | else |
dda83cd7 SM |
3688 | { |
3689 | int is_enumeral = | |
66d7f48f | 3690 | (syms[i].symbol->aclass () == LOC_CONST |
5f9c5a63 SM |
3691 | && syms[i].symbol->type () != NULL |
3692 | && syms[i].symbol->type ()->code () == TYPE_CODE_ENUM); | |
de93309a | 3693 | struct symtab *symtab = NULL; |
4c4b4cd2 | 3694 | |
7b3ecc75 | 3695 | if (syms[i].symbol->is_objfile_owned ()) |
4206d69e | 3696 | symtab = syms[i].symbol->symtab (); |
de93309a | 3697 | |
5d0027b9 | 3698 | if (syms[i].symbol->line () != 0 && symtab != NULL) |
de93309a | 3699 | { |
6cb06a8c | 3700 | gdb_printf ("[%d] ", i + first_choice); |
de93309a SM |
3701 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, |
3702 | &type_print_raw_options); | |
6cb06a8c TT |
3703 | gdb_printf (_(" at %s:%d\n"), |
3704 | symtab_to_filename_for_display (symtab), | |
3705 | syms[i].symbol->line ()); | |
de93309a | 3706 | } |
dda83cd7 | 3707 | else if (is_enumeral |
5f9c5a63 | 3708 | && syms[i].symbol->type ()->name () != NULL) |
dda83cd7 | 3709 | { |
6cb06a8c | 3710 | gdb_printf (("[%d] "), i + first_choice); |
5f9c5a63 | 3711 | ada_print_type (syms[i].symbol->type (), NULL, |
dda83cd7 | 3712 | gdb_stdout, -1, 0, &type_print_raw_options); |
6cb06a8c TT |
3713 | gdb_printf (_("'(%s) (enumeral)\n"), |
3714 | syms[i].symbol->print_name ()); | |
dda83cd7 | 3715 | } |
de93309a SM |
3716 | else |
3717 | { | |
6cb06a8c | 3718 | gdb_printf ("[%d] ", i + first_choice); |
de93309a SM |
3719 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, |
3720 | &type_print_raw_options); | |
3721 | ||
3722 | if (symtab != NULL) | |
6cb06a8c TT |
3723 | gdb_printf (is_enumeral |
3724 | ? _(" in %s (enumeral)\n") | |
3725 | : _(" at %s:?\n"), | |
3726 | symtab_to_filename_for_display (symtab)); | |
de93309a | 3727 | else |
6cb06a8c TT |
3728 | gdb_printf (is_enumeral |
3729 | ? _(" (enumeral)\n") | |
3730 | : _(" at ?\n")); | |
de93309a | 3731 | } |
dda83cd7 | 3732 | } |
14f9c5c9 | 3733 | } |
14f9c5c9 | 3734 | |
de93309a | 3735 | n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1, |
dda83cd7 | 3736 | "overload-choice"); |
14f9c5c9 | 3737 | |
de93309a SM |
3738 | for (i = 0; i < n_chosen; i += 1) |
3739 | syms[i] = syms[chosen[i]]; | |
14f9c5c9 | 3740 | |
de93309a SM |
3741 | return n_chosen; |
3742 | } | |
14f9c5c9 | 3743 | |
cd9a3148 TT |
3744 | /* See ada-lang.h. */ |
3745 | ||
3746 | block_symbol | |
7056f312 | 3747 | ada_find_operator_symbol (enum exp_opcode op, bool parse_completion, |
cd9a3148 TT |
3748 | int nargs, value *argvec[]) |
3749 | { | |
3750 | if (possible_user_operator_p (op, argvec)) | |
3751 | { | |
3752 | std::vector<struct block_symbol> candidates | |
3753 | = ada_lookup_symbol_list (ada_decoded_op_name (op), | |
3754 | NULL, VAR_DOMAIN); | |
3755 | ||
3756 | int i = ada_resolve_function (candidates, argvec, | |
3757 | nargs, ada_decoded_op_name (op), NULL, | |
3758 | parse_completion); | |
3759 | if (i >= 0) | |
3760 | return candidates[i]; | |
3761 | } | |
3762 | return {}; | |
3763 | } | |
3764 | ||
3765 | /* See ada-lang.h. */ | |
3766 | ||
3767 | block_symbol | |
3768 | ada_resolve_funcall (struct symbol *sym, const struct block *block, | |
3769 | struct type *context_type, | |
7056f312 | 3770 | bool parse_completion, |
cd9a3148 TT |
3771 | int nargs, value *argvec[], |
3772 | innermost_block_tracker *tracker) | |
3773 | { | |
3774 | std::vector<struct block_symbol> candidates | |
3775 | = ada_lookup_symbol_list (sym->linkage_name (), block, VAR_DOMAIN); | |
3776 | ||
3777 | int i; | |
3778 | if (candidates.size () == 1) | |
3779 | i = 0; | |
3780 | else | |
3781 | { | |
3782 | i = ada_resolve_function | |
3783 | (candidates, | |
3784 | argvec, nargs, | |
3785 | sym->linkage_name (), | |
3786 | context_type, parse_completion); | |
3787 | if (i < 0) | |
3788 | error (_("Could not find a match for %s"), sym->print_name ()); | |
3789 | } | |
3790 | ||
3791 | tracker->update (candidates[i]); | |
3792 | return candidates[i]; | |
3793 | } | |
3794 | ||
ba8694b6 TT |
3795 | /* Resolve a mention of a name where the context type is an |
3796 | enumeration type. */ | |
3797 | ||
3798 | static int | |
3799 | ada_resolve_enum (std::vector<struct block_symbol> &syms, | |
3800 | const char *name, struct type *context_type, | |
3801 | bool parse_completion) | |
3802 | { | |
3803 | gdb_assert (context_type->code () == TYPE_CODE_ENUM); | |
3804 | context_type = ada_check_typedef (context_type); | |
3805 | ||
3806 | for (int i = 0; i < syms.size (); ++i) | |
3807 | { | |
3808 | /* We already know the name matches, so we're just looking for | |
3809 | an element of the correct enum type. */ | |
5f9c5a63 | 3810 | if (ada_check_typedef (syms[i].symbol->type ()) == context_type) |
ba8694b6 TT |
3811 | return i; |
3812 | } | |
3813 | ||
3814 | error (_("No name '%s' in enumeration type '%s'"), name, | |
3815 | ada_type_name (context_type)); | |
3816 | } | |
3817 | ||
cd9a3148 TT |
3818 | /* See ada-lang.h. */ |
3819 | ||
3820 | block_symbol | |
3821 | ada_resolve_variable (struct symbol *sym, const struct block *block, | |
3822 | struct type *context_type, | |
7056f312 | 3823 | bool parse_completion, |
cd9a3148 TT |
3824 | int deprocedure_p, |
3825 | innermost_block_tracker *tracker) | |
3826 | { | |
3827 | std::vector<struct block_symbol> candidates | |
3828 | = ada_lookup_symbol_list (sym->linkage_name (), block, VAR_DOMAIN); | |
3829 | ||
3830 | if (std::any_of (candidates.begin (), | |
3831 | candidates.end (), | |
3832 | [] (block_symbol &bsym) | |
3833 | { | |
66d7f48f | 3834 | switch (bsym.symbol->aclass ()) |
cd9a3148 TT |
3835 | { |
3836 | case LOC_REGISTER: | |
3837 | case LOC_ARG: | |
3838 | case LOC_REF_ARG: | |
3839 | case LOC_REGPARM_ADDR: | |
3840 | case LOC_LOCAL: | |
3841 | case LOC_COMPUTED: | |
3842 | return true; | |
3843 | default: | |
3844 | return false; | |
3845 | } | |
3846 | })) | |
3847 | { | |
3848 | /* Types tend to get re-introduced locally, so if there | |
3849 | are any local symbols that are not types, first filter | |
3850 | out all types. */ | |
3851 | candidates.erase | |
3852 | (std::remove_if | |
3853 | (candidates.begin (), | |
3854 | candidates.end (), | |
3855 | [] (block_symbol &bsym) | |
3856 | { | |
66d7f48f | 3857 | return bsym.symbol->aclass () == LOC_TYPEDEF; |
cd9a3148 TT |
3858 | }), |
3859 | candidates.end ()); | |
3860 | } | |
3861 | ||
2c71f639 TV |
3862 | /* Filter out artificial symbols. */ |
3863 | candidates.erase | |
3864 | (std::remove_if | |
3865 | (candidates.begin (), | |
3866 | candidates.end (), | |
3867 | [] (block_symbol &bsym) | |
3868 | { | |
496feb16 | 3869 | return bsym.symbol->is_artificial (); |
2c71f639 TV |
3870 | }), |
3871 | candidates.end ()); | |
3872 | ||
cd9a3148 TT |
3873 | int i; |
3874 | if (candidates.empty ()) | |
3875 | error (_("No definition found for %s"), sym->print_name ()); | |
3876 | else if (candidates.size () == 1) | |
3877 | i = 0; | |
ba8694b6 TT |
3878 | else if (context_type != nullptr |
3879 | && context_type->code () == TYPE_CODE_ENUM) | |
3880 | i = ada_resolve_enum (candidates, sym->linkage_name (), context_type, | |
3881 | parse_completion); | |
cd9a3148 TT |
3882 | else if (deprocedure_p && !is_nonfunction (candidates)) |
3883 | { | |
3884 | i = ada_resolve_function | |
3885 | (candidates, NULL, 0, | |
3886 | sym->linkage_name (), | |
3887 | context_type, parse_completion); | |
3888 | if (i < 0) | |
3889 | error (_("Could not find a match for %s"), sym->print_name ()); | |
3890 | } | |
3891 | else | |
3892 | { | |
6cb06a8c | 3893 | gdb_printf (_("Multiple matches for %s\n"), sym->print_name ()); |
cd9a3148 TT |
3894 | user_select_syms (candidates.data (), candidates.size (), 1); |
3895 | i = 0; | |
3896 | } | |
3897 | ||
3898 | tracker->update (candidates[i]); | |
3899 | return candidates[i]; | |
3900 | } | |
3901 | ||
db2534b7 | 3902 | /* Return non-zero if formal type FTYPE matches actual type ATYPE. */ |
de93309a SM |
3903 | /* The term "match" here is rather loose. The match is heuristic and |
3904 | liberal. */ | |
14f9c5c9 | 3905 | |
de93309a | 3906 | static int |
db2534b7 | 3907 | ada_type_match (struct type *ftype, struct type *atype) |
14f9c5c9 | 3908 | { |
de93309a SM |
3909 | ftype = ada_check_typedef (ftype); |
3910 | atype = ada_check_typedef (atype); | |
14f9c5c9 | 3911 | |
78134374 | 3912 | if (ftype->code () == TYPE_CODE_REF) |
27710edb | 3913 | ftype = ftype->target_type (); |
78134374 | 3914 | if (atype->code () == TYPE_CODE_REF) |
27710edb | 3915 | atype = atype->target_type (); |
14f9c5c9 | 3916 | |
78134374 | 3917 | switch (ftype->code ()) |
14f9c5c9 | 3918 | { |
de93309a | 3919 | default: |
78134374 | 3920 | return ftype->code () == atype->code (); |
de93309a | 3921 | case TYPE_CODE_PTR: |
db2534b7 TT |
3922 | if (atype->code () != TYPE_CODE_PTR) |
3923 | return 0; | |
27710edb | 3924 | atype = atype->target_type (); |
db2534b7 | 3925 | /* This can only happen if the actual argument is 'null'. */ |
df86565b | 3926 | if (atype->code () == TYPE_CODE_INT && atype->length () == 0) |
db2534b7 | 3927 | return 1; |
27710edb | 3928 | return ada_type_match (ftype->target_type (), atype); |
de93309a SM |
3929 | case TYPE_CODE_INT: |
3930 | case TYPE_CODE_ENUM: | |
3931 | case TYPE_CODE_RANGE: | |
78134374 | 3932 | switch (atype->code ()) |
dda83cd7 SM |
3933 | { |
3934 | case TYPE_CODE_INT: | |
3935 | case TYPE_CODE_ENUM: | |
3936 | case TYPE_CODE_RANGE: | |
3937 | return 1; | |
3938 | default: | |
3939 | return 0; | |
3940 | } | |
d2e4a39e | 3941 | |
de93309a | 3942 | case TYPE_CODE_ARRAY: |
78134374 | 3943 | return (atype->code () == TYPE_CODE_ARRAY |
dda83cd7 | 3944 | || ada_is_array_descriptor_type (atype)); |
14f9c5c9 | 3945 | |
de93309a SM |
3946 | case TYPE_CODE_STRUCT: |
3947 | if (ada_is_array_descriptor_type (ftype)) | |
dda83cd7 SM |
3948 | return (atype->code () == TYPE_CODE_ARRAY |
3949 | || ada_is_array_descriptor_type (atype)); | |
de93309a | 3950 | else |
dda83cd7 SM |
3951 | return (atype->code () == TYPE_CODE_STRUCT |
3952 | && !ada_is_array_descriptor_type (atype)); | |
14f9c5c9 | 3953 | |
de93309a SM |
3954 | case TYPE_CODE_UNION: |
3955 | case TYPE_CODE_FLT: | |
78134374 | 3956 | return (atype->code () == ftype->code ()); |
de93309a | 3957 | } |
14f9c5c9 AS |
3958 | } |
3959 | ||
de93309a SM |
3960 | /* Return non-zero if the formals of FUNC "sufficiently match" the |
3961 | vector of actual argument types ACTUALS of size N_ACTUALS. FUNC | |
3962 | may also be an enumeral, in which case it is treated as a 0- | |
3963 | argument function. */ | |
14f9c5c9 | 3964 | |
de93309a SM |
3965 | static int |
3966 | ada_args_match (struct symbol *func, struct value **actuals, int n_actuals) | |
3967 | { | |
3968 | int i; | |
5f9c5a63 | 3969 | struct type *func_type = func->type (); |
14f9c5c9 | 3970 | |
66d7f48f | 3971 | if (func->aclass () == LOC_CONST |
78134374 | 3972 | && func_type->code () == TYPE_CODE_ENUM) |
de93309a | 3973 | return (n_actuals == 0); |
78134374 | 3974 | else if (func_type == NULL || func_type->code () != TYPE_CODE_FUNC) |
de93309a | 3975 | return 0; |
14f9c5c9 | 3976 | |
1f704f76 | 3977 | if (func_type->num_fields () != n_actuals) |
de93309a | 3978 | return 0; |
14f9c5c9 | 3979 | |
de93309a SM |
3980 | for (i = 0; i < n_actuals; i += 1) |
3981 | { | |
3982 | if (actuals[i] == NULL) | |
dda83cd7 | 3983 | return 0; |
de93309a | 3984 | else |
dda83cd7 SM |
3985 | { |
3986 | struct type *ftype = ada_check_typedef (func_type->field (i).type ()); | |
d0c97917 | 3987 | struct type *atype = ada_check_typedef (actuals[i]->type ()); |
14f9c5c9 | 3988 | |
db2534b7 | 3989 | if (!ada_type_match (ftype, atype)) |
dda83cd7 SM |
3990 | return 0; |
3991 | } | |
de93309a SM |
3992 | } |
3993 | return 1; | |
3994 | } | |
d2e4a39e | 3995 | |
de93309a SM |
3996 | /* False iff function type FUNC_TYPE definitely does not produce a value |
3997 | compatible with type CONTEXT_TYPE. Conservatively returns 1 if | |
3998 | FUNC_TYPE is not a valid function type with a non-null return type | |
3999 | or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */ | |
14f9c5c9 | 4000 | |
de93309a SM |
4001 | static int |
4002 | return_match (struct type *func_type, struct type *context_type) | |
4003 | { | |
4004 | struct type *return_type; | |
d2e4a39e | 4005 | |
de93309a SM |
4006 | if (func_type == NULL) |
4007 | return 1; | |
14f9c5c9 | 4008 | |
78134374 | 4009 | if (func_type->code () == TYPE_CODE_FUNC) |
27710edb | 4010 | return_type = get_base_type (func_type->target_type ()); |
de93309a SM |
4011 | else |
4012 | return_type = get_base_type (func_type); | |
4013 | if (return_type == NULL) | |
4014 | return 1; | |
76a01679 | 4015 | |
de93309a | 4016 | context_type = get_base_type (context_type); |
14f9c5c9 | 4017 | |
78134374 | 4018 | if (return_type->code () == TYPE_CODE_ENUM) |
de93309a SM |
4019 | return context_type == NULL || return_type == context_type; |
4020 | else if (context_type == NULL) | |
78134374 | 4021 | return return_type->code () != TYPE_CODE_VOID; |
de93309a | 4022 | else |
78134374 | 4023 | return return_type->code () == context_type->code (); |
de93309a | 4024 | } |
14f9c5c9 | 4025 | |
14f9c5c9 | 4026 | |
1bfa81ac | 4027 | /* Returns the index in SYMS that contains the symbol for the |
de93309a SM |
4028 | function (if any) that matches the types of the NARGS arguments in |
4029 | ARGS. If CONTEXT_TYPE is non-null and there is at least one match | |
4030 | that returns that type, then eliminate matches that don't. If | |
4031 | CONTEXT_TYPE is void and there is at least one match that does not | |
4032 | return void, eliminate all matches that do. | |
14f9c5c9 | 4033 | |
de93309a SM |
4034 | Asks the user if there is more than one match remaining. Returns -1 |
4035 | if there is no such symbol or none is selected. NAME is used | |
4036 | solely for messages. May re-arrange and modify SYMS in | |
4037 | the process; the index returned is for the modified vector. */ | |
14f9c5c9 | 4038 | |
de93309a | 4039 | static int |
d1183b06 TT |
4040 | ada_resolve_function (std::vector<struct block_symbol> &syms, |
4041 | struct value **args, int nargs, | |
dda83cd7 | 4042 | const char *name, struct type *context_type, |
7056f312 | 4043 | bool parse_completion) |
de93309a SM |
4044 | { |
4045 | int fallback; | |
4046 | int k; | |
4047 | int m; /* Number of hits */ | |
14f9c5c9 | 4048 | |
de93309a SM |
4049 | m = 0; |
4050 | /* In the first pass of the loop, we only accept functions matching | |
4051 | context_type. If none are found, we add a second pass of the loop | |
4052 | where every function is accepted. */ | |
4053 | for (fallback = 0; m == 0 && fallback < 2; fallback++) | |
4054 | { | |
d1183b06 | 4055 | for (k = 0; k < syms.size (); k += 1) |
dda83cd7 | 4056 | { |
5f9c5a63 | 4057 | struct type *type = ada_check_typedef (syms[k].symbol->type ()); |
5b4ee69b | 4058 | |
dda83cd7 SM |
4059 | if (ada_args_match (syms[k].symbol, args, nargs) |
4060 | && (fallback || return_match (type, context_type))) | |
4061 | { | |
4062 | syms[m] = syms[k]; | |
4063 | m += 1; | |
4064 | } | |
4065 | } | |
14f9c5c9 AS |
4066 | } |
4067 | ||
de93309a SM |
4068 | /* If we got multiple matches, ask the user which one to use. Don't do this |
4069 | interactive thing during completion, though, as the purpose of the | |
4070 | completion is providing a list of all possible matches. Prompting the | |
4071 | user to filter it down would be completely unexpected in this case. */ | |
4072 | if (m == 0) | |
4073 | return -1; | |
4074 | else if (m > 1 && !parse_completion) | |
4075 | { | |
6cb06a8c | 4076 | gdb_printf (_("Multiple matches for %s\n"), name); |
d1183b06 | 4077 | user_select_syms (syms.data (), m, 1); |
de93309a SM |
4078 | return 0; |
4079 | } | |
4080 | return 0; | |
14f9c5c9 AS |
4081 | } |
4082 | ||
14f9c5c9 AS |
4083 | /* Type-class predicates */ |
4084 | ||
4c4b4cd2 PH |
4085 | /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type), |
4086 | or FLOAT). */ | |
14f9c5c9 AS |
4087 | |
4088 | static int | |
d2e4a39e | 4089 | numeric_type_p (struct type *type) |
14f9c5c9 AS |
4090 | { |
4091 | if (type == NULL) | |
4092 | return 0; | |
d2e4a39e AS |
4093 | else |
4094 | { | |
78134374 | 4095 | switch (type->code ()) |
dda83cd7 SM |
4096 | { |
4097 | case TYPE_CODE_INT: | |
4098 | case TYPE_CODE_FLT: | |
c04da66c | 4099 | case TYPE_CODE_FIXED_POINT: |
dda83cd7 SM |
4100 | return 1; |
4101 | case TYPE_CODE_RANGE: | |
27710edb SM |
4102 | return (type == type->target_type () |
4103 | || numeric_type_p (type->target_type ())); | |
dda83cd7 SM |
4104 | default: |
4105 | return 0; | |
4106 | } | |
d2e4a39e | 4107 | } |
14f9c5c9 AS |
4108 | } |
4109 | ||
4c4b4cd2 | 4110 | /* True iff TYPE is integral (an INT or RANGE of INTs). */ |
14f9c5c9 AS |
4111 | |
4112 | static int | |
d2e4a39e | 4113 | integer_type_p (struct type *type) |
14f9c5c9 AS |
4114 | { |
4115 | if (type == NULL) | |
4116 | return 0; | |
d2e4a39e AS |
4117 | else |
4118 | { | |
78134374 | 4119 | switch (type->code ()) |
dda83cd7 SM |
4120 | { |
4121 | case TYPE_CODE_INT: | |
4122 | return 1; | |
4123 | case TYPE_CODE_RANGE: | |
27710edb SM |
4124 | return (type == type->target_type () |
4125 | || integer_type_p (type->target_type ())); | |
dda83cd7 SM |
4126 | default: |
4127 | return 0; | |
4128 | } | |
d2e4a39e | 4129 | } |
14f9c5c9 AS |
4130 | } |
4131 | ||
4c4b4cd2 | 4132 | /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */ |
14f9c5c9 AS |
4133 | |
4134 | static int | |
d2e4a39e | 4135 | scalar_type_p (struct type *type) |
14f9c5c9 AS |
4136 | { |
4137 | if (type == NULL) | |
4138 | return 0; | |
d2e4a39e AS |
4139 | else |
4140 | { | |
78134374 | 4141 | switch (type->code ()) |
dda83cd7 SM |
4142 | { |
4143 | case TYPE_CODE_INT: | |
4144 | case TYPE_CODE_RANGE: | |
4145 | case TYPE_CODE_ENUM: | |
4146 | case TYPE_CODE_FLT: | |
c04da66c | 4147 | case TYPE_CODE_FIXED_POINT: |
dda83cd7 SM |
4148 | return 1; |
4149 | default: | |
4150 | return 0; | |
4151 | } | |
d2e4a39e | 4152 | } |
14f9c5c9 AS |
4153 | } |
4154 | ||
98847c1e TT |
4155 | /* True iff TYPE is discrete, as defined in the Ada Reference Manual. |
4156 | This essentially means one of (INT, RANGE, ENUM) -- but note that | |
4157 | "enum" includes character and boolean as well. */ | |
14f9c5c9 AS |
4158 | |
4159 | static int | |
d2e4a39e | 4160 | discrete_type_p (struct type *type) |
14f9c5c9 AS |
4161 | { |
4162 | if (type == NULL) | |
4163 | return 0; | |
d2e4a39e AS |
4164 | else |
4165 | { | |
78134374 | 4166 | switch (type->code ()) |
dda83cd7 SM |
4167 | { |
4168 | case TYPE_CODE_INT: | |
4169 | case TYPE_CODE_RANGE: | |
4170 | case TYPE_CODE_ENUM: | |
4171 | case TYPE_CODE_BOOL: | |
98847c1e | 4172 | case TYPE_CODE_CHAR: |
dda83cd7 SM |
4173 | return 1; |
4174 | default: | |
4175 | return 0; | |
4176 | } | |
d2e4a39e | 4177 | } |
14f9c5c9 AS |
4178 | } |
4179 | ||
4c4b4cd2 PH |
4180 | /* Returns non-zero if OP with operands in the vector ARGS could be |
4181 | a user-defined function. Errs on the side of pre-defined operators | |
4182 | (i.e., result 0). */ | |
14f9c5c9 AS |
4183 | |
4184 | static int | |
d2e4a39e | 4185 | possible_user_operator_p (enum exp_opcode op, struct value *args[]) |
14f9c5c9 | 4186 | { |
76a01679 | 4187 | struct type *type0 = |
d0c97917 | 4188 | (args[0] == NULL) ? NULL : ada_check_typedef (args[0]->type ()); |
d2e4a39e | 4189 | struct type *type1 = |
d0c97917 | 4190 | (args[1] == NULL) ? NULL : ada_check_typedef (args[1]->type ()); |
d2e4a39e | 4191 | |
4c4b4cd2 PH |
4192 | if (type0 == NULL) |
4193 | return 0; | |
4194 | ||
14f9c5c9 AS |
4195 | switch (op) |
4196 | { | |
4197 | default: | |
4198 | return 0; | |
4199 | ||
4200 | case BINOP_ADD: | |
4201 | case BINOP_SUB: | |
4202 | case BINOP_MUL: | |
4203 | case BINOP_DIV: | |
d2e4a39e | 4204 | return (!(numeric_type_p (type0) && numeric_type_p (type1))); |
14f9c5c9 AS |
4205 | |
4206 | case BINOP_REM: | |
4207 | case BINOP_MOD: | |
4208 | case BINOP_BITWISE_AND: | |
4209 | case BINOP_BITWISE_IOR: | |
4210 | case BINOP_BITWISE_XOR: | |
d2e4a39e | 4211 | return (!(integer_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4212 | |
4213 | case BINOP_EQUAL: | |
4214 | case BINOP_NOTEQUAL: | |
4215 | case BINOP_LESS: | |
4216 | case BINOP_GTR: | |
4217 | case BINOP_LEQ: | |
4218 | case BINOP_GEQ: | |
d2e4a39e | 4219 | return (!(scalar_type_p (type0) && scalar_type_p (type1))); |
14f9c5c9 AS |
4220 | |
4221 | case BINOP_CONCAT: | |
ee90b9ab | 4222 | return !ada_is_array_type (type0) || !ada_is_array_type (type1); |
14f9c5c9 AS |
4223 | |
4224 | case BINOP_EXP: | |
d2e4a39e | 4225 | return (!(numeric_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4226 | |
4227 | case UNOP_NEG: | |
4228 | case UNOP_PLUS: | |
4229 | case UNOP_LOGICAL_NOT: | |
d2e4a39e AS |
4230 | case UNOP_ABS: |
4231 | return (!numeric_type_p (type0)); | |
14f9c5c9 AS |
4232 | |
4233 | } | |
4234 | } | |
4235 | \f | |
dda83cd7 | 4236 | /* Renaming */ |
14f9c5c9 | 4237 | |
aeb5907d JB |
4238 | /* NOTES: |
4239 | ||
4240 | 1. In the following, we assume that a renaming type's name may | |
4241 | have an ___XD suffix. It would be nice if this went away at some | |
4242 | point. | |
4243 | 2. We handle both the (old) purely type-based representation of | |
4244 | renamings and the (new) variable-based encoding. At some point, | |
4245 | it is devoutly to be hoped that the former goes away | |
4246 | (FIXME: hilfinger-2007-07-09). | |
4247 | 3. Subprogram renamings are not implemented, although the XRS | |
4248 | suffix is recognized (FIXME: hilfinger-2007-07-09). */ | |
4249 | ||
4250 | /* If SYM encodes a renaming, | |
4251 | ||
4252 | <renaming> renames <renamed entity>, | |
4253 | ||
4254 | sets *LEN to the length of the renamed entity's name, | |
4255 | *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to | |
4256 | the string describing the subcomponent selected from the renamed | |
0963b4bd | 4257 | entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming |
aeb5907d JB |
4258 | (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR |
4259 | are undefined). Otherwise, returns a value indicating the category | |
4260 | of entity renamed: an object (ADA_OBJECT_RENAMING), exception | |
4261 | (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or | |
4262 | subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the | |
4263 | strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be | |
4264 | deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR | |
4265 | may be NULL, in which case they are not assigned. | |
4266 | ||
4267 | [Currently, however, GCC does not generate subprogram renamings.] */ | |
4268 | ||
4269 | enum ada_renaming_category | |
4270 | ada_parse_renaming (struct symbol *sym, | |
4271 | const char **renamed_entity, int *len, | |
4272 | const char **renaming_expr) | |
4273 | { | |
4274 | enum ada_renaming_category kind; | |
4275 | const char *info; | |
4276 | const char *suffix; | |
4277 | ||
4278 | if (sym == NULL) | |
4279 | return ADA_NOT_RENAMING; | |
66d7f48f | 4280 | switch (sym->aclass ()) |
14f9c5c9 | 4281 | { |
aeb5907d JB |
4282 | default: |
4283 | return ADA_NOT_RENAMING; | |
aeb5907d JB |
4284 | case LOC_LOCAL: |
4285 | case LOC_STATIC: | |
4286 | case LOC_COMPUTED: | |
4287 | case LOC_OPTIMIZED_OUT: | |
987012b8 | 4288 | info = strstr (sym->linkage_name (), "___XR"); |
aeb5907d JB |
4289 | if (info == NULL) |
4290 | return ADA_NOT_RENAMING; | |
4291 | switch (info[5]) | |
4292 | { | |
4293 | case '_': | |
4294 | kind = ADA_OBJECT_RENAMING; | |
4295 | info += 6; | |
4296 | break; | |
4297 | case 'E': | |
4298 | kind = ADA_EXCEPTION_RENAMING; | |
4299 | info += 7; | |
4300 | break; | |
4301 | case 'P': | |
4302 | kind = ADA_PACKAGE_RENAMING; | |
4303 | info += 7; | |
4304 | break; | |
4305 | case 'S': | |
4306 | kind = ADA_SUBPROGRAM_RENAMING; | |
4307 | info += 7; | |
4308 | break; | |
4309 | default: | |
4310 | return ADA_NOT_RENAMING; | |
4311 | } | |
14f9c5c9 | 4312 | } |
4c4b4cd2 | 4313 | |
de93309a SM |
4314 | if (renamed_entity != NULL) |
4315 | *renamed_entity = info; | |
4316 | suffix = strstr (info, "___XE"); | |
4317 | if (suffix == NULL || suffix == info) | |
4318 | return ADA_NOT_RENAMING; | |
4319 | if (len != NULL) | |
4320 | *len = strlen (info) - strlen (suffix); | |
4321 | suffix += 5; | |
4322 | if (renaming_expr != NULL) | |
4323 | *renaming_expr = suffix; | |
4324 | return kind; | |
4325 | } | |
4326 | ||
4327 | /* Compute the value of the given RENAMING_SYM, which is expected to | |
4328 | be a symbol encoding a renaming expression. BLOCK is the block | |
4329 | used to evaluate the renaming. */ | |
4330 | ||
4331 | static struct value * | |
4332 | ada_read_renaming_var_value (struct symbol *renaming_sym, | |
4333 | const struct block *block) | |
4334 | { | |
4335 | const char *sym_name; | |
4336 | ||
987012b8 | 4337 | sym_name = renaming_sym->linkage_name (); |
de93309a SM |
4338 | expression_up expr = parse_exp_1 (&sym_name, 0, block, 0); |
4339 | return evaluate_expression (expr.get ()); | |
4340 | } | |
4341 | \f | |
4342 | ||
dda83cd7 | 4343 | /* Evaluation: Function Calls */ |
de93309a SM |
4344 | |
4345 | /* Return an lvalue containing the value VAL. This is the identity on | |
4346 | lvalues, and otherwise has the side-effect of allocating memory | |
4347 | in the inferior where a copy of the value contents is copied. */ | |
4348 | ||
4349 | static struct value * | |
4350 | ensure_lval (struct value *val) | |
4351 | { | |
4352 | if (VALUE_LVAL (val) == not_lval | |
4353 | || VALUE_LVAL (val) == lval_internalvar) | |
4354 | { | |
d0c97917 | 4355 | int len = ada_check_typedef (val->type ())->length (); |
de93309a | 4356 | const CORE_ADDR addr = |
dda83cd7 | 4357 | value_as_long (value_allocate_space_in_inferior (len)); |
de93309a SM |
4358 | |
4359 | VALUE_LVAL (val) = lval_memory; | |
9feb2d07 | 4360 | val->set_address (addr); |
50888e42 | 4361 | write_memory (addr, value_contents (val).data (), len); |
de93309a SM |
4362 | } |
4363 | ||
4364 | return val; | |
4365 | } | |
4366 | ||
4367 | /* Given ARG, a value of type (pointer or reference to a)* | |
4368 | structure/union, extract the component named NAME from the ultimate | |
4369 | target structure/union and return it as a value with its | |
4370 | appropriate type. | |
4371 | ||
4372 | The routine searches for NAME among all members of the structure itself | |
4373 | and (recursively) among all members of any wrapper members | |
4374 | (e.g., '_parent'). | |
4375 | ||
4376 | If NO_ERR, then simply return NULL in case of error, rather than | |
4377 | calling error. */ | |
4378 | ||
4379 | static struct value * | |
4380 | ada_value_struct_elt (struct value *arg, const char *name, int no_err) | |
4381 | { | |
4382 | struct type *t, *t1; | |
4383 | struct value *v; | |
4384 | int check_tag; | |
4385 | ||
4386 | v = NULL; | |
d0c97917 | 4387 | t1 = t = ada_check_typedef (arg->type ()); |
78134374 | 4388 | if (t->code () == TYPE_CODE_REF) |
de93309a | 4389 | { |
27710edb | 4390 | t1 = t->target_type (); |
de93309a SM |
4391 | if (t1 == NULL) |
4392 | goto BadValue; | |
4393 | t1 = ada_check_typedef (t1); | |
78134374 | 4394 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4395 | { |
4396 | arg = coerce_ref (arg); | |
4397 | t = t1; | |
4398 | } | |
de93309a SM |
4399 | } |
4400 | ||
78134374 | 4401 | while (t->code () == TYPE_CODE_PTR) |
de93309a | 4402 | { |
27710edb | 4403 | t1 = t->target_type (); |
de93309a SM |
4404 | if (t1 == NULL) |
4405 | goto BadValue; | |
4406 | t1 = ada_check_typedef (t1); | |
78134374 | 4407 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4408 | { |
4409 | arg = value_ind (arg); | |
4410 | t = t1; | |
4411 | } | |
de93309a | 4412 | else |
dda83cd7 | 4413 | break; |
de93309a | 4414 | } |
aeb5907d | 4415 | |
78134374 | 4416 | if (t1->code () != TYPE_CODE_STRUCT && t1->code () != TYPE_CODE_UNION) |
de93309a | 4417 | goto BadValue; |
52ce6436 | 4418 | |
de93309a SM |
4419 | if (t1 == t) |
4420 | v = ada_search_struct_field (name, arg, 0, t); | |
4421 | else | |
4422 | { | |
4423 | int bit_offset, bit_size, byte_offset; | |
4424 | struct type *field_type; | |
4425 | CORE_ADDR address; | |
a5ee536b | 4426 | |
78134374 | 4427 | if (t->code () == TYPE_CODE_PTR) |
9feb2d07 | 4428 | address = ada_value_ind (arg)->address (); |
de93309a | 4429 | else |
9feb2d07 | 4430 | address = ada_coerce_ref (arg)->address (); |
d2e4a39e | 4431 | |
de93309a | 4432 | /* Check to see if this is a tagged type. We also need to handle |
dda83cd7 SM |
4433 | the case where the type is a reference to a tagged type, but |
4434 | we have to be careful to exclude pointers to tagged types. | |
4435 | The latter should be shown as usual (as a pointer), whereas | |
4436 | a reference should mostly be transparent to the user. */ | |
14f9c5c9 | 4437 | |
de93309a | 4438 | if (ada_is_tagged_type (t1, 0) |
dda83cd7 | 4439 | || (t1->code () == TYPE_CODE_REF |
27710edb | 4440 | && ada_is_tagged_type (t1->target_type (), 0))) |
dda83cd7 SM |
4441 | { |
4442 | /* We first try to find the searched field in the current type. | |
de93309a | 4443 | If not found then let's look in the fixed type. */ |
14f9c5c9 | 4444 | |
dda83cd7 | 4445 | if (!find_struct_field (name, t1, 0, |
4d1795ac TT |
4446 | nullptr, nullptr, nullptr, |
4447 | nullptr, nullptr)) | |
de93309a SM |
4448 | check_tag = 1; |
4449 | else | |
4450 | check_tag = 0; | |
dda83cd7 | 4451 | } |
de93309a SM |
4452 | else |
4453 | check_tag = 0; | |
c3e5cd34 | 4454 | |
de93309a SM |
4455 | /* Convert to fixed type in all cases, so that we have proper |
4456 | offsets to each field in unconstrained record types. */ | |
4457 | t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, | |
4458 | address, NULL, check_tag); | |
4459 | ||
24aa1b02 TT |
4460 | /* Resolve the dynamic type as well. */ |
4461 | arg = value_from_contents_and_address (t1, nullptr, address); | |
d0c97917 | 4462 | t1 = arg->type (); |
24aa1b02 | 4463 | |
de93309a | 4464 | if (find_struct_field (name, t1, 0, |
dda83cd7 SM |
4465 | &field_type, &byte_offset, &bit_offset, |
4466 | &bit_size, NULL)) | |
4467 | { | |
4468 | if (bit_size != 0) | |
4469 | { | |
4470 | if (t->code () == TYPE_CODE_REF) | |
4471 | arg = ada_coerce_ref (arg); | |
4472 | else | |
4473 | arg = ada_value_ind (arg); | |
4474 | v = ada_value_primitive_packed_val (arg, NULL, byte_offset, | |
4475 | bit_offset, bit_size, | |
4476 | field_type); | |
4477 | } | |
4478 | else | |
4479 | v = value_at_lazy (field_type, address + byte_offset); | |
4480 | } | |
c3e5cd34 | 4481 | } |
14f9c5c9 | 4482 | |
de93309a SM |
4483 | if (v != NULL || no_err) |
4484 | return v; | |
4485 | else | |
4486 | error (_("There is no member named %s."), name); | |
4487 | ||
4488 | BadValue: | |
4489 | if (no_err) | |
4490 | return NULL; | |
4491 | else | |
4492 | error (_("Attempt to extract a component of " | |
4493 | "a value that is not a record.")); | |
14f9c5c9 AS |
4494 | } |
4495 | ||
4496 | /* Return the value ACTUAL, converted to be an appropriate value for a | |
4497 | formal of type FORMAL_TYPE. Use *SP as a stack pointer for | |
4498 | allocating any necessary descriptors (fat pointers), or copies of | |
4c4b4cd2 | 4499 | values not residing in memory, updating it as needed. */ |
14f9c5c9 | 4500 | |
a93c0eb6 | 4501 | struct value * |
40bc484c | 4502 | ada_convert_actual (struct value *actual, struct type *formal_type0) |
14f9c5c9 | 4503 | { |
d0c97917 | 4504 | struct type *actual_type = ada_check_typedef (actual->type ()); |
61ee279c | 4505 | struct type *formal_type = ada_check_typedef (formal_type0); |
d2e4a39e | 4506 | struct type *formal_target = |
78134374 | 4507 | formal_type->code () == TYPE_CODE_PTR |
27710edb | 4508 | ? ada_check_typedef (formal_type->target_type ()) : formal_type; |
d2e4a39e | 4509 | struct type *actual_target = |
78134374 | 4510 | actual_type->code () == TYPE_CODE_PTR |
27710edb | 4511 | ? ada_check_typedef (actual_type->target_type ()) : actual_type; |
14f9c5c9 | 4512 | |
4c4b4cd2 | 4513 | if (ada_is_array_descriptor_type (formal_target) |
78134374 | 4514 | && actual_target->code () == TYPE_CODE_ARRAY) |
40bc484c | 4515 | return make_array_descriptor (formal_type, actual); |
78134374 SM |
4516 | else if (formal_type->code () == TYPE_CODE_PTR |
4517 | || formal_type->code () == TYPE_CODE_REF) | |
14f9c5c9 | 4518 | { |
a84a8a0d | 4519 | struct value *result; |
5b4ee69b | 4520 | |
78134374 | 4521 | if (formal_target->code () == TYPE_CODE_ARRAY |
dda83cd7 | 4522 | && ada_is_array_descriptor_type (actual_target)) |
a84a8a0d | 4523 | result = desc_data (actual); |
78134374 | 4524 | else if (formal_type->code () != TYPE_CODE_PTR) |
dda83cd7 SM |
4525 | { |
4526 | if (VALUE_LVAL (actual) != lval_memory) | |
4527 | { | |
4528 | struct value *val; | |
4529 | ||
d0c97917 | 4530 | actual_type = ada_check_typedef (actual->type ()); |
dda83cd7 | 4531 | val = allocate_value (actual_type); |
4bce7cda | 4532 | copy (value_contents (actual), value_contents_raw (val)); |
dda83cd7 SM |
4533 | actual = ensure_lval (val); |
4534 | } | |
4535 | result = value_addr (actual); | |
4536 | } | |
a84a8a0d JB |
4537 | else |
4538 | return actual; | |
b1af9e97 | 4539 | return value_cast_pointers (formal_type, result, 0); |
14f9c5c9 | 4540 | } |
78134374 | 4541 | else if (actual_type->code () == TYPE_CODE_PTR) |
14f9c5c9 | 4542 | return ada_value_ind (actual); |
8344af1e JB |
4543 | else if (ada_is_aligner_type (formal_type)) |
4544 | { | |
4545 | /* We need to turn this parameter into an aligner type | |
4546 | as well. */ | |
4547 | struct value *aligner = allocate_value (formal_type); | |
4548 | struct value *component = ada_value_struct_elt (aligner, "F", 0); | |
4549 | ||
4550 | value_assign_to_component (aligner, component, actual); | |
4551 | return aligner; | |
4552 | } | |
14f9c5c9 AS |
4553 | |
4554 | return actual; | |
4555 | } | |
4556 | ||
438c98a1 JB |
4557 | /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of |
4558 | type TYPE. This is usually an inefficient no-op except on some targets | |
4559 | (such as AVR) where the representation of a pointer and an address | |
4560 | differs. */ | |
4561 | ||
4562 | static CORE_ADDR | |
4563 | value_pointer (struct value *value, struct type *type) | |
4564 | { | |
df86565b | 4565 | unsigned len = type->length (); |
224c3ddb | 4566 | gdb_byte *buf = (gdb_byte *) alloca (len); |
438c98a1 JB |
4567 | CORE_ADDR addr; |
4568 | ||
9feb2d07 | 4569 | addr = value->address (); |
8ee511af | 4570 | gdbarch_address_to_pointer (type->arch (), type, buf, addr); |
34877895 | 4571 | addr = extract_unsigned_integer (buf, len, type_byte_order (type)); |
438c98a1 JB |
4572 | return addr; |
4573 | } | |
4574 | ||
14f9c5c9 | 4575 | |
4c4b4cd2 PH |
4576 | /* Push a descriptor of type TYPE for array value ARR on the stack at |
4577 | *SP, updating *SP to reflect the new descriptor. Return either | |
14f9c5c9 | 4578 | an lvalue representing the new descriptor, or (if TYPE is a pointer- |
4c4b4cd2 PH |
4579 | to-descriptor type rather than a descriptor type), a struct value * |
4580 | representing a pointer to this descriptor. */ | |
14f9c5c9 | 4581 | |
d2e4a39e | 4582 | static struct value * |
40bc484c | 4583 | make_array_descriptor (struct type *type, struct value *arr) |
14f9c5c9 | 4584 | { |
d2e4a39e AS |
4585 | struct type *bounds_type = desc_bounds_type (type); |
4586 | struct type *desc_type = desc_base_type (type); | |
4587 | struct value *descriptor = allocate_value (desc_type); | |
4588 | struct value *bounds = allocate_value (bounds_type); | |
14f9c5c9 | 4589 | int i; |
d2e4a39e | 4590 | |
d0c97917 | 4591 | for (i = ada_array_arity (ada_check_typedef (arr->type ())); |
0963b4bd | 4592 | i > 0; i -= 1) |
14f9c5c9 | 4593 | { |
d0c97917 | 4594 | modify_field (bounds->type (), |
50888e42 | 4595 | value_contents_writeable (bounds).data (), |
19f220c3 JK |
4596 | ada_array_bound (arr, i, 0), |
4597 | desc_bound_bitpos (bounds_type, i, 0), | |
4598 | desc_bound_bitsize (bounds_type, i, 0)); | |
d0c97917 | 4599 | modify_field (bounds->type (), |
50888e42 | 4600 | value_contents_writeable (bounds).data (), |
19f220c3 JK |
4601 | ada_array_bound (arr, i, 1), |
4602 | desc_bound_bitpos (bounds_type, i, 1), | |
4603 | desc_bound_bitsize (bounds_type, i, 1)); | |
14f9c5c9 | 4604 | } |
d2e4a39e | 4605 | |
40bc484c | 4606 | bounds = ensure_lval (bounds); |
d2e4a39e | 4607 | |
d0c97917 | 4608 | modify_field (descriptor->type (), |
50888e42 | 4609 | value_contents_writeable (descriptor).data (), |
19f220c3 | 4610 | value_pointer (ensure_lval (arr), |
940da03e | 4611 | desc_type->field (0).type ()), |
19f220c3 JK |
4612 | fat_pntr_data_bitpos (desc_type), |
4613 | fat_pntr_data_bitsize (desc_type)); | |
4614 | ||
d0c97917 | 4615 | modify_field (descriptor->type (), |
50888e42 | 4616 | value_contents_writeable (descriptor).data (), |
19f220c3 | 4617 | value_pointer (bounds, |
940da03e | 4618 | desc_type->field (1).type ()), |
19f220c3 JK |
4619 | fat_pntr_bounds_bitpos (desc_type), |
4620 | fat_pntr_bounds_bitsize (desc_type)); | |
14f9c5c9 | 4621 | |
40bc484c | 4622 | descriptor = ensure_lval (descriptor); |
14f9c5c9 | 4623 | |
78134374 | 4624 | if (type->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
4625 | return value_addr (descriptor); |
4626 | else | |
4627 | return descriptor; | |
4628 | } | |
14f9c5c9 | 4629 | \f |
dda83cd7 | 4630 | /* Symbol Cache Module */ |
3d9434b5 | 4631 | |
3d9434b5 | 4632 | /* Performance measurements made as of 2010-01-15 indicate that |
ee01b665 | 4633 | this cache does bring some noticeable improvements. Depending |
3d9434b5 JB |
4634 | on the type of entity being printed, the cache can make it as much |
4635 | as an order of magnitude faster than without it. | |
4636 | ||
4637 | The descriptive type DWARF extension has significantly reduced | |
4638 | the need for this cache, at least when DWARF is being used. However, | |
4639 | even in this case, some expensive name-based symbol searches are still | |
4640 | sometimes necessary - to find an XVZ variable, mostly. */ | |
4641 | ||
ee01b665 JB |
4642 | /* Return the symbol cache associated to the given program space PSPACE. |
4643 | If not allocated for this PSPACE yet, allocate and initialize one. */ | |
3d9434b5 | 4644 | |
ee01b665 JB |
4645 | static struct ada_symbol_cache * |
4646 | ada_get_symbol_cache (struct program_space *pspace) | |
4647 | { | |
4648 | struct ada_pspace_data *pspace_data = get_ada_pspace_data (pspace); | |
ee01b665 | 4649 | |
bdcccc56 TT |
4650 | if (pspace_data->sym_cache == nullptr) |
4651 | pspace_data->sym_cache.reset (new ada_symbol_cache); | |
ee01b665 | 4652 | |
bdcccc56 | 4653 | return pspace_data->sym_cache.get (); |
ee01b665 | 4654 | } |
3d9434b5 JB |
4655 | |
4656 | /* Clear all entries from the symbol cache. */ | |
4657 | ||
4658 | static void | |
bdcccc56 | 4659 | ada_clear_symbol_cache () |
3d9434b5 | 4660 | { |
bdcccc56 TT |
4661 | struct ada_pspace_data *pspace_data |
4662 | = get_ada_pspace_data (current_program_space); | |
ee01b665 | 4663 | |
bdcccc56 TT |
4664 | if (pspace_data->sym_cache != nullptr) |
4665 | pspace_data->sym_cache.reset (); | |
3d9434b5 JB |
4666 | } |
4667 | ||
fe978cb0 | 4668 | /* Search our cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4669 | Return it if found, or NULL otherwise. */ |
4670 | ||
4671 | static struct cache_entry ** | |
fe978cb0 | 4672 | find_entry (const char *name, domain_enum domain) |
3d9434b5 | 4673 | { |
ee01b665 JB |
4674 | struct ada_symbol_cache *sym_cache |
4675 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 JB |
4676 | int h = msymbol_hash (name) % HASH_SIZE; |
4677 | struct cache_entry **e; | |
4678 | ||
ee01b665 | 4679 | for (e = &sym_cache->root[h]; *e != NULL; e = &(*e)->next) |
3d9434b5 | 4680 | { |
fe978cb0 | 4681 | if (domain == (*e)->domain && strcmp (name, (*e)->name) == 0) |
dda83cd7 | 4682 | return e; |
3d9434b5 JB |
4683 | } |
4684 | return NULL; | |
4685 | } | |
4686 | ||
fe978cb0 | 4687 | /* Search the symbol cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4688 | Return 1 if found, 0 otherwise. |
4689 | ||
4690 | If an entry was found and SYM is not NULL, set *SYM to the entry's | |
4691 | SYM. Same principle for BLOCK if not NULL. */ | |
96d887e8 | 4692 | |
96d887e8 | 4693 | static int |
fe978cb0 | 4694 | lookup_cached_symbol (const char *name, domain_enum domain, |
dda83cd7 | 4695 | struct symbol **sym, const struct block **block) |
96d887e8 | 4696 | { |
fe978cb0 | 4697 | struct cache_entry **e = find_entry (name, domain); |
3d9434b5 JB |
4698 | |
4699 | if (e == NULL) | |
4700 | return 0; | |
4701 | if (sym != NULL) | |
4702 | *sym = (*e)->sym; | |
4703 | if (block != NULL) | |
4704 | *block = (*e)->block; | |
4705 | return 1; | |
96d887e8 PH |
4706 | } |
4707 | ||
3d9434b5 | 4708 | /* Assuming that (SYM, BLOCK) is the result of the lookup of NAME |
fe978cb0 | 4709 | in domain DOMAIN, save this result in our symbol cache. */ |
3d9434b5 | 4710 | |
96d887e8 | 4711 | static void |
fe978cb0 | 4712 | cache_symbol (const char *name, domain_enum domain, struct symbol *sym, |
dda83cd7 | 4713 | const struct block *block) |
96d887e8 | 4714 | { |
ee01b665 JB |
4715 | struct ada_symbol_cache *sym_cache |
4716 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 | 4717 | int h; |
3d9434b5 JB |
4718 | struct cache_entry *e; |
4719 | ||
1994afbf DE |
4720 | /* Symbols for builtin types don't have a block. |
4721 | For now don't cache such symbols. */ | |
7b3ecc75 | 4722 | if (sym != NULL && !sym->is_objfile_owned ()) |
1994afbf DE |
4723 | return; |
4724 | ||
3d9434b5 JB |
4725 | /* If the symbol is a local symbol, then do not cache it, as a search |
4726 | for that symbol depends on the context. To determine whether | |
4727 | the symbol is local or not, we check the block where we found it | |
4728 | against the global and static blocks of its associated symtab. */ | |
63d609de SM |
4729 | if (sym != nullptr) |
4730 | { | |
4731 | const blockvector &bv = *sym->symtab ()->compunit ()->blockvector (); | |
4732 | ||
4733 | if (bv.global_block () != block && bv.static_block () != block) | |
4734 | return; | |
4735 | } | |
3d9434b5 JB |
4736 | |
4737 | h = msymbol_hash (name) % HASH_SIZE; | |
e39db4db | 4738 | e = XOBNEW (&sym_cache->cache_space, cache_entry); |
ee01b665 JB |
4739 | e->next = sym_cache->root[h]; |
4740 | sym_cache->root[h] = e; | |
2ef5453b | 4741 | e->name = obstack_strdup (&sym_cache->cache_space, name); |
3d9434b5 | 4742 | e->sym = sym; |
fe978cb0 | 4743 | e->domain = domain; |
3d9434b5 | 4744 | e->block = block; |
96d887e8 | 4745 | } |
4c4b4cd2 | 4746 | \f |
dda83cd7 | 4747 | /* Symbol Lookup */ |
4c4b4cd2 | 4748 | |
b5ec771e PA |
4749 | /* Return the symbol name match type that should be used used when |
4750 | searching for all symbols matching LOOKUP_NAME. | |
c0431670 JB |
4751 | |
4752 | LOOKUP_NAME is expected to be a symbol name after transformation | |
f98b2e33 | 4753 | for Ada lookups. */ |
c0431670 | 4754 | |
b5ec771e PA |
4755 | static symbol_name_match_type |
4756 | name_match_type_from_name (const char *lookup_name) | |
c0431670 | 4757 | { |
b5ec771e PA |
4758 | return (strstr (lookup_name, "__") == NULL |
4759 | ? symbol_name_match_type::WILD | |
4760 | : symbol_name_match_type::FULL); | |
c0431670 JB |
4761 | } |
4762 | ||
4c4b4cd2 PH |
4763 | /* Return the result of a standard (literal, C-like) lookup of NAME in |
4764 | given DOMAIN, visible from lexical block BLOCK. */ | |
4765 | ||
4766 | static struct symbol * | |
4767 | standard_lookup (const char *name, const struct block *block, | |
dda83cd7 | 4768 | domain_enum domain) |
4c4b4cd2 | 4769 | { |
acbd605d | 4770 | /* Initialize it just to avoid a GCC false warning. */ |
6640a367 | 4771 | struct block_symbol sym = {}; |
4c4b4cd2 | 4772 | |
d12307c1 PMR |
4773 | if (lookup_cached_symbol (name, domain, &sym.symbol, NULL)) |
4774 | return sym.symbol; | |
a2cd4f14 | 4775 | ada_lookup_encoded_symbol (name, block, domain, &sym); |
d12307c1 PMR |
4776 | cache_symbol (name, domain, sym.symbol, sym.block); |
4777 | return sym.symbol; | |
4c4b4cd2 PH |
4778 | } |
4779 | ||
4780 | ||
4781 | /* Non-zero iff there is at least one non-function/non-enumeral symbol | |
1bfa81ac | 4782 | in the symbol fields of SYMS. We treat enumerals as functions, |
4c4b4cd2 PH |
4783 | since they contend in overloading in the same way. */ |
4784 | static int | |
d1183b06 | 4785 | is_nonfunction (const std::vector<struct block_symbol> &syms) |
4c4b4cd2 | 4786 | { |
d1183b06 | 4787 | for (const block_symbol &sym : syms) |
5f9c5a63 SM |
4788 | if (sym.symbol->type ()->code () != TYPE_CODE_FUNC |
4789 | && (sym.symbol->type ()->code () != TYPE_CODE_ENUM | |
66d7f48f | 4790 | || sym.symbol->aclass () != LOC_CONST)) |
14f9c5c9 AS |
4791 | return 1; |
4792 | ||
4793 | return 0; | |
4794 | } | |
4795 | ||
4796 | /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent | |
4c4b4cd2 | 4797 | struct types. Otherwise, they may not. */ |
14f9c5c9 AS |
4798 | |
4799 | static int | |
d2e4a39e | 4800 | equiv_types (struct type *type0, struct type *type1) |
14f9c5c9 | 4801 | { |
d2e4a39e | 4802 | if (type0 == type1) |
14f9c5c9 | 4803 | return 1; |
d2e4a39e | 4804 | if (type0 == NULL || type1 == NULL |
78134374 | 4805 | || type0->code () != type1->code ()) |
14f9c5c9 | 4806 | return 0; |
78134374 SM |
4807 | if ((type0->code () == TYPE_CODE_STRUCT |
4808 | || type0->code () == TYPE_CODE_ENUM) | |
14f9c5c9 | 4809 | && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL |
4c4b4cd2 | 4810 | && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0) |
14f9c5c9 | 4811 | return 1; |
d2e4a39e | 4812 | |
14f9c5c9 AS |
4813 | return 0; |
4814 | } | |
4815 | ||
4816 | /* True iff SYM0 represents the same entity as SYM1, or one that is | |
4c4b4cd2 | 4817 | no more defined than that of SYM1. */ |
14f9c5c9 AS |
4818 | |
4819 | static int | |
d2e4a39e | 4820 | lesseq_defined_than (struct symbol *sym0, struct symbol *sym1) |
14f9c5c9 AS |
4821 | { |
4822 | if (sym0 == sym1) | |
4823 | return 1; | |
6c9c307c | 4824 | if (sym0->domain () != sym1->domain () |
66d7f48f | 4825 | || sym0->aclass () != sym1->aclass ()) |
14f9c5c9 AS |
4826 | return 0; |
4827 | ||
66d7f48f | 4828 | switch (sym0->aclass ()) |
14f9c5c9 AS |
4829 | { |
4830 | case LOC_UNDEF: | |
4831 | return 1; | |
4832 | case LOC_TYPEDEF: | |
4833 | { | |
5f9c5a63 SM |
4834 | struct type *type0 = sym0->type (); |
4835 | struct type *type1 = sym1->type (); | |
dda83cd7 SM |
4836 | const char *name0 = sym0->linkage_name (); |
4837 | const char *name1 = sym1->linkage_name (); | |
4838 | int len0 = strlen (name0); | |
4839 | ||
4840 | return | |
4841 | type0->code () == type1->code () | |
4842 | && (equiv_types (type0, type1) | |
4843 | || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0 | |
4844 | && startswith (name1 + len0, "___XV"))); | |
14f9c5c9 AS |
4845 | } |
4846 | case LOC_CONST: | |
4aeddc50 | 4847 | return sym0->value_longest () == sym1->value_longest () |
5f9c5a63 | 4848 | && equiv_types (sym0->type (), sym1->type ()); |
4b610737 TT |
4849 | |
4850 | case LOC_STATIC: | |
4851 | { | |
dda83cd7 SM |
4852 | const char *name0 = sym0->linkage_name (); |
4853 | const char *name1 = sym1->linkage_name (); | |
4854 | return (strcmp (name0, name1) == 0 | |
4aeddc50 | 4855 | && sym0->value_address () == sym1->value_address ()); |
4b610737 TT |
4856 | } |
4857 | ||
d2e4a39e AS |
4858 | default: |
4859 | return 0; | |
14f9c5c9 AS |
4860 | } |
4861 | } | |
4862 | ||
d1183b06 TT |
4863 | /* Append (SYM,BLOCK) to the end of the array of struct block_symbol |
4864 | records in RESULT. Do nothing if SYM is a duplicate. */ | |
14f9c5c9 AS |
4865 | |
4866 | static void | |
d1183b06 | 4867 | add_defn_to_vec (std::vector<struct block_symbol> &result, |
dda83cd7 SM |
4868 | struct symbol *sym, |
4869 | const struct block *block) | |
14f9c5c9 | 4870 | { |
529cad9c PH |
4871 | /* Do not try to complete stub types, as the debugger is probably |
4872 | already scanning all symbols matching a certain name at the | |
4873 | time when this function is called. Trying to replace the stub | |
4874 | type by its associated full type will cause us to restart a scan | |
4875 | which may lead to an infinite recursion. Instead, the client | |
4876 | collecting the matching symbols will end up collecting several | |
4877 | matches, with at least one of them complete. It can then filter | |
4878 | out the stub ones if needed. */ | |
4879 | ||
d1183b06 | 4880 | for (int i = result.size () - 1; i >= 0; i -= 1) |
4c4b4cd2 | 4881 | { |
d1183b06 | 4882 | if (lesseq_defined_than (sym, result[i].symbol)) |
dda83cd7 | 4883 | return; |
d1183b06 | 4884 | else if (lesseq_defined_than (result[i].symbol, sym)) |
dda83cd7 | 4885 | { |
d1183b06 TT |
4886 | result[i].symbol = sym; |
4887 | result[i].block = block; | |
dda83cd7 SM |
4888 | return; |
4889 | } | |
4c4b4cd2 PH |
4890 | } |
4891 | ||
d1183b06 TT |
4892 | struct block_symbol info; |
4893 | info.symbol = sym; | |
4894 | info.block = block; | |
4895 | result.push_back (info); | |
4c4b4cd2 PH |
4896 | } |
4897 | ||
7c7b6655 TT |
4898 | /* Return a bound minimal symbol matching NAME according to Ada |
4899 | decoding rules. Returns an invalid symbol if there is no such | |
4900 | minimal symbol. Names prefixed with "standard__" are handled | |
4901 | specially: "standard__" is first stripped off, and only static and | |
4902 | global symbols are searched. */ | |
4c4b4cd2 | 4903 | |
7c7b6655 | 4904 | struct bound_minimal_symbol |
06a670e2 | 4905 | ada_lookup_simple_minsym (const char *name, struct objfile *objfile) |
4c4b4cd2 | 4906 | { |
7c7b6655 | 4907 | struct bound_minimal_symbol result; |
4c4b4cd2 | 4908 | |
b5ec771e PA |
4909 | symbol_name_match_type match_type = name_match_type_from_name (name); |
4910 | lookup_name_info lookup_name (name, match_type); | |
4911 | ||
4912 | symbol_name_matcher_ftype *match_name | |
4913 | = ada_get_symbol_name_matcher (lookup_name); | |
4c4b4cd2 | 4914 | |
06a670e2 MM |
4915 | gdbarch_iterate_over_objfiles_in_search_order |
4916 | (objfile != NULL ? objfile->arch () : target_gdbarch (), | |
4917 | [&result, lookup_name, match_name] (struct objfile *obj) | |
4918 | { | |
4919 | for (minimal_symbol *msymbol : obj->msymbols ()) | |
4920 | { | |
4921 | if (match_name (msymbol->linkage_name (), lookup_name, nullptr) | |
4922 | && msymbol->type () != mst_solib_trampoline) | |
4923 | { | |
4924 | result.minsym = msymbol; | |
4925 | result.objfile = obj; | |
4926 | return 1; | |
4927 | } | |
4928 | } | |
4929 | ||
4930 | return 0; | |
4931 | }, objfile); | |
4c4b4cd2 | 4932 | |
7c7b6655 | 4933 | return result; |
96d887e8 | 4934 | } |
4c4b4cd2 | 4935 | |
96d887e8 PH |
4936 | /* True if TYPE is definitely an artificial type supplied to a symbol |
4937 | for which no debugging information was given in the symbol file. */ | |
14f9c5c9 | 4938 | |
96d887e8 PH |
4939 | static int |
4940 | is_nondebugging_type (struct type *type) | |
4941 | { | |
0d5cff50 | 4942 | const char *name = ada_type_name (type); |
5b4ee69b | 4943 | |
96d887e8 PH |
4944 | return (name != NULL && strcmp (name, "<variable, no debug info>") == 0); |
4945 | } | |
4c4b4cd2 | 4946 | |
8f17729f JB |
4947 | /* Return nonzero if TYPE1 and TYPE2 are two enumeration types |
4948 | that are deemed "identical" for practical purposes. | |
4949 | ||
4950 | This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM | |
4951 | types and that their number of enumerals is identical (in other | |
1f704f76 | 4952 | words, type1->num_fields () == type2->num_fields ()). */ |
8f17729f JB |
4953 | |
4954 | static int | |
4955 | ada_identical_enum_types_p (struct type *type1, struct type *type2) | |
4956 | { | |
4957 | int i; | |
4958 | ||
4959 | /* The heuristic we use here is fairly conservative. We consider | |
4960 | that 2 enumerate types are identical if they have the same | |
4961 | number of enumerals and that all enumerals have the same | |
4962 | underlying value and name. */ | |
4963 | ||
4964 | /* All enums in the type should have an identical underlying value. */ | |
1f704f76 | 4965 | for (i = 0; i < type1->num_fields (); i++) |
970db518 | 4966 | if (type1->field (i).loc_enumval () != type2->field (i).loc_enumval ()) |
8f17729f JB |
4967 | return 0; |
4968 | ||
4969 | /* All enumerals should also have the same name (modulo any numerical | |
4970 | suffix). */ | |
1f704f76 | 4971 | for (i = 0; i < type1->num_fields (); i++) |
8f17729f | 4972 | { |
33d16dd9 SM |
4973 | const char *name_1 = type1->field (i).name (); |
4974 | const char *name_2 = type2->field (i).name (); | |
8f17729f JB |
4975 | int len_1 = strlen (name_1); |
4976 | int len_2 = strlen (name_2); | |
4977 | ||
33d16dd9 SM |
4978 | ada_remove_trailing_digits (type1->field (i).name (), &len_1); |
4979 | ada_remove_trailing_digits (type2->field (i).name (), &len_2); | |
8f17729f | 4980 | if (len_1 != len_2 |
33d16dd9 SM |
4981 | || strncmp (type1->field (i).name (), |
4982 | type2->field (i).name (), | |
8f17729f JB |
4983 | len_1) != 0) |
4984 | return 0; | |
4985 | } | |
4986 | ||
4987 | return 1; | |
4988 | } | |
4989 | ||
4990 | /* Return nonzero if all the symbols in SYMS are all enumeral symbols | |
4991 | that are deemed "identical" for practical purposes. Sometimes, | |
4992 | enumerals are not strictly identical, but their types are so similar | |
4993 | that they can be considered identical. | |
4994 | ||
4995 | For instance, consider the following code: | |
4996 | ||
4997 | type Color is (Black, Red, Green, Blue, White); | |
4998 | type RGB_Color is new Color range Red .. Blue; | |
4999 | ||
5000 | Type RGB_Color is a subrange of an implicit type which is a copy | |
5001 | of type Color. If we call that implicit type RGB_ColorB ("B" is | |
5002 | for "Base Type"), then type RGB_ColorB is a copy of type Color. | |
5003 | As a result, when an expression references any of the enumeral | |
5004 | by name (Eg. "print green"), the expression is technically | |
5005 | ambiguous and the user should be asked to disambiguate. But | |
5006 | doing so would only hinder the user, since it wouldn't matter | |
5007 | what choice he makes, the outcome would always be the same. | |
5008 | So, for practical purposes, we consider them as the same. */ | |
5009 | ||
5010 | static int | |
54d343a2 | 5011 | symbols_are_identical_enums (const std::vector<struct block_symbol> &syms) |
8f17729f JB |
5012 | { |
5013 | int i; | |
5014 | ||
5015 | /* Before performing a thorough comparison check of each type, | |
5016 | we perform a series of inexpensive checks. We expect that these | |
5017 | checks will quickly fail in the vast majority of cases, and thus | |
5018 | help prevent the unnecessary use of a more expensive comparison. | |
5019 | Said comparison also expects us to make some of these checks | |
5020 | (see ada_identical_enum_types_p). */ | |
5021 | ||
5022 | /* Quick check: All symbols should have an enum type. */ | |
54d343a2 | 5023 | for (i = 0; i < syms.size (); i++) |
5f9c5a63 | 5024 | if (syms[i].symbol->type ()->code () != TYPE_CODE_ENUM) |
8f17729f JB |
5025 | return 0; |
5026 | ||
5027 | /* Quick check: They should all have the same value. */ | |
54d343a2 | 5028 | for (i = 1; i < syms.size (); i++) |
4aeddc50 | 5029 | if (syms[i].symbol->value_longest () != syms[0].symbol->value_longest ()) |
8f17729f JB |
5030 | return 0; |
5031 | ||
5032 | /* Quick check: They should all have the same number of enumerals. */ | |
54d343a2 | 5033 | for (i = 1; i < syms.size (); i++) |
5f9c5a63 SM |
5034 | if (syms[i].symbol->type ()->num_fields () |
5035 | != syms[0].symbol->type ()->num_fields ()) | |
8f17729f JB |
5036 | return 0; |
5037 | ||
5038 | /* All the sanity checks passed, so we might have a set of | |
5039 | identical enumeration types. Perform a more complete | |
5040 | comparison of the type of each symbol. */ | |
54d343a2 | 5041 | for (i = 1; i < syms.size (); i++) |
5f9c5a63 SM |
5042 | if (!ada_identical_enum_types_p (syms[i].symbol->type (), |
5043 | syms[0].symbol->type ())) | |
8f17729f JB |
5044 | return 0; |
5045 | ||
5046 | return 1; | |
5047 | } | |
5048 | ||
54d343a2 | 5049 | /* Remove any non-debugging symbols in SYMS that definitely |
96d887e8 PH |
5050 | duplicate other symbols in the list (The only case I know of where |
5051 | this happens is when object files containing stabs-in-ecoff are | |
5052 | linked with files containing ordinary ecoff debugging symbols (or no | |
1bfa81ac | 5053 | debugging symbols)). Modifies SYMS to squeeze out deleted entries. */ |
4c4b4cd2 | 5054 | |
d1183b06 | 5055 | static void |
54d343a2 | 5056 | remove_extra_symbols (std::vector<struct block_symbol> *syms) |
96d887e8 PH |
5057 | { |
5058 | int i, j; | |
4c4b4cd2 | 5059 | |
8f17729f JB |
5060 | /* We should never be called with less than 2 symbols, as there |
5061 | cannot be any extra symbol in that case. But it's easy to | |
5062 | handle, since we have nothing to do in that case. */ | |
54d343a2 | 5063 | if (syms->size () < 2) |
d1183b06 | 5064 | return; |
8f17729f | 5065 | |
96d887e8 | 5066 | i = 0; |
54d343a2 | 5067 | while (i < syms->size ()) |
96d887e8 | 5068 | { |
a35ddb44 | 5069 | int remove_p = 0; |
339c13b6 JB |
5070 | |
5071 | /* If two symbols have the same name and one of them is a stub type, | |
dda83cd7 | 5072 | the get rid of the stub. */ |
339c13b6 | 5073 | |
5f9c5a63 | 5074 | if ((*syms)[i].symbol->type ()->is_stub () |
dda83cd7 SM |
5075 | && (*syms)[i].symbol->linkage_name () != NULL) |
5076 | { | |
5077 | for (j = 0; j < syms->size (); j++) | |
5078 | { | |
5079 | if (j != i | |
5f9c5a63 | 5080 | && !(*syms)[j].symbol->type ()->is_stub () |
dda83cd7 SM |
5081 | && (*syms)[j].symbol->linkage_name () != NULL |
5082 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5083 | (*syms)[j].symbol->linkage_name ()) == 0) | |
5084 | remove_p = 1; | |
5085 | } | |
5086 | } | |
339c13b6 JB |
5087 | |
5088 | /* Two symbols with the same name, same class and same address | |
dda83cd7 | 5089 | should be identical. */ |
339c13b6 | 5090 | |
987012b8 | 5091 | else if ((*syms)[i].symbol->linkage_name () != NULL |
66d7f48f | 5092 | && (*syms)[i].symbol->aclass () == LOC_STATIC |
5f9c5a63 | 5093 | && is_nondebugging_type ((*syms)[i].symbol->type ())) |
dda83cd7 SM |
5094 | { |
5095 | for (j = 0; j < syms->size (); j += 1) | |
5096 | { | |
5097 | if (i != j | |
5098 | && (*syms)[j].symbol->linkage_name () != NULL | |
5099 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5100 | (*syms)[j].symbol->linkage_name ()) == 0 | |
66d7f48f SM |
5101 | && ((*syms)[i].symbol->aclass () |
5102 | == (*syms)[j].symbol->aclass ()) | |
4aeddc50 SM |
5103 | && (*syms)[i].symbol->value_address () |
5104 | == (*syms)[j].symbol->value_address ()) | |
dda83cd7 SM |
5105 | remove_p = 1; |
5106 | } | |
5107 | } | |
339c13b6 | 5108 | |
a35ddb44 | 5109 | if (remove_p) |
54d343a2 | 5110 | syms->erase (syms->begin () + i); |
1b788fb6 TT |
5111 | else |
5112 | i += 1; | |
14f9c5c9 | 5113 | } |
8f17729f JB |
5114 | |
5115 | /* If all the remaining symbols are identical enumerals, then | |
5116 | just keep the first one and discard the rest. | |
5117 | ||
5118 | Unlike what we did previously, we do not discard any entry | |
5119 | unless they are ALL identical. This is because the symbol | |
5120 | comparison is not a strict comparison, but rather a practical | |
5121 | comparison. If all symbols are considered identical, then | |
5122 | we can just go ahead and use the first one and discard the rest. | |
5123 | But if we cannot reduce the list to a single element, we have | |
5124 | to ask the user to disambiguate anyways. And if we have to | |
5125 | present a multiple-choice menu, it's less confusing if the list | |
5126 | isn't missing some choices that were identical and yet distinct. */ | |
54d343a2 TT |
5127 | if (symbols_are_identical_enums (*syms)) |
5128 | syms->resize (1); | |
14f9c5c9 AS |
5129 | } |
5130 | ||
96d887e8 PH |
5131 | /* Given a type that corresponds to a renaming entity, use the type name |
5132 | to extract the scope (package name or function name, fully qualified, | |
5133 | and following the GNAT encoding convention) where this renaming has been | |
49d83361 | 5134 | defined. */ |
4c4b4cd2 | 5135 | |
49d83361 | 5136 | static std::string |
96d887e8 | 5137 | xget_renaming_scope (struct type *renaming_type) |
14f9c5c9 | 5138 | { |
96d887e8 | 5139 | /* The renaming types adhere to the following convention: |
0963b4bd | 5140 | <scope>__<rename>___<XR extension>. |
96d887e8 PH |
5141 | So, to extract the scope, we search for the "___XR" extension, |
5142 | and then backtrack until we find the first "__". */ | |
76a01679 | 5143 | |
7d93a1e0 | 5144 | const char *name = renaming_type->name (); |
108d56a4 SM |
5145 | const char *suffix = strstr (name, "___XR"); |
5146 | const char *last; | |
14f9c5c9 | 5147 | |
96d887e8 PH |
5148 | /* Now, backtrack a bit until we find the first "__". Start looking |
5149 | at suffix - 3, as the <rename> part is at least one character long. */ | |
14f9c5c9 | 5150 | |
96d887e8 PH |
5151 | for (last = suffix - 3; last > name; last--) |
5152 | if (last[0] == '_' && last[1] == '_') | |
5153 | break; | |
76a01679 | 5154 | |
96d887e8 | 5155 | /* Make a copy of scope and return it. */ |
49d83361 | 5156 | return std::string (name, last); |
4c4b4cd2 PH |
5157 | } |
5158 | ||
96d887e8 | 5159 | /* Return nonzero if NAME corresponds to a package name. */ |
4c4b4cd2 | 5160 | |
96d887e8 PH |
5161 | static int |
5162 | is_package_name (const char *name) | |
4c4b4cd2 | 5163 | { |
96d887e8 PH |
5164 | /* Here, We take advantage of the fact that no symbols are generated |
5165 | for packages, while symbols are generated for each function. | |
5166 | So the condition for NAME represent a package becomes equivalent | |
5167 | to NAME not existing in our list of symbols. There is only one | |
5168 | small complication with library-level functions (see below). */ | |
4c4b4cd2 | 5169 | |
96d887e8 PH |
5170 | /* If it is a function that has not been defined at library level, |
5171 | then we should be able to look it up in the symbols. */ | |
5172 | if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL) | |
5173 | return 0; | |
14f9c5c9 | 5174 | |
96d887e8 PH |
5175 | /* Library-level function names start with "_ada_". See if function |
5176 | "_ada_" followed by NAME can be found. */ | |
14f9c5c9 | 5177 | |
96d887e8 | 5178 | /* Do a quick check that NAME does not contain "__", since library-level |
e1d5a0d2 | 5179 | functions names cannot contain "__" in them. */ |
96d887e8 PH |
5180 | if (strstr (name, "__") != NULL) |
5181 | return 0; | |
4c4b4cd2 | 5182 | |
528e1572 | 5183 | std::string fun_name = string_printf ("_ada_%s", name); |
14f9c5c9 | 5184 | |
528e1572 | 5185 | return (standard_lookup (fun_name.c_str (), NULL, VAR_DOMAIN) == NULL); |
96d887e8 | 5186 | } |
14f9c5c9 | 5187 | |
96d887e8 | 5188 | /* Return nonzero if SYM corresponds to a renaming entity that is |
aeb5907d | 5189 | not visible from FUNCTION_NAME. */ |
14f9c5c9 | 5190 | |
96d887e8 | 5191 | static int |
0d5cff50 | 5192 | old_renaming_is_invisible (const struct symbol *sym, const char *function_name) |
96d887e8 | 5193 | { |
66d7f48f | 5194 | if (sym->aclass () != LOC_TYPEDEF) |
aeb5907d JB |
5195 | return 0; |
5196 | ||
5f9c5a63 | 5197 | std::string scope = xget_renaming_scope (sym->type ()); |
14f9c5c9 | 5198 | |
96d887e8 | 5199 | /* If the rename has been defined in a package, then it is visible. */ |
49d83361 TT |
5200 | if (is_package_name (scope.c_str ())) |
5201 | return 0; | |
14f9c5c9 | 5202 | |
96d887e8 PH |
5203 | /* Check that the rename is in the current function scope by checking |
5204 | that its name starts with SCOPE. */ | |
76a01679 | 5205 | |
96d887e8 PH |
5206 | /* If the function name starts with "_ada_", it means that it is |
5207 | a library-level function. Strip this prefix before doing the | |
5208 | comparison, as the encoding for the renaming does not contain | |
5209 | this prefix. */ | |
61012eef | 5210 | if (startswith (function_name, "_ada_")) |
96d887e8 | 5211 | function_name += 5; |
f26caa11 | 5212 | |
49d83361 | 5213 | return !startswith (function_name, scope.c_str ()); |
f26caa11 PH |
5214 | } |
5215 | ||
aeb5907d JB |
5216 | /* Remove entries from SYMS that corresponds to a renaming entity that |
5217 | is not visible from the function associated with CURRENT_BLOCK or | |
5218 | that is superfluous due to the presence of more specific renaming | |
5219 | information. Places surviving symbols in the initial entries of | |
d1183b06 TT |
5220 | SYMS. |
5221 | ||
96d887e8 | 5222 | Rationale: |
aeb5907d JB |
5223 | First, in cases where an object renaming is implemented as a |
5224 | reference variable, GNAT may produce both the actual reference | |
5225 | variable and the renaming encoding. In this case, we discard the | |
5226 | latter. | |
5227 | ||
5228 | Second, GNAT emits a type following a specified encoding for each renaming | |
96d887e8 PH |
5229 | entity. Unfortunately, STABS currently does not support the definition |
5230 | of types that are local to a given lexical block, so all renamings types | |
5231 | are emitted at library level. As a consequence, if an application | |
5232 | contains two renaming entities using the same name, and a user tries to | |
5233 | print the value of one of these entities, the result of the ada symbol | |
5234 | lookup will also contain the wrong renaming type. | |
f26caa11 | 5235 | |
96d887e8 PH |
5236 | This function partially covers for this limitation by attempting to |
5237 | remove from the SYMS list renaming symbols that should be visible | |
5238 | from CURRENT_BLOCK. However, there does not seem be a 100% reliable | |
5239 | method with the current information available. The implementation | |
5240 | below has a couple of limitations (FIXME: brobecker-2003-05-12): | |
5241 | ||
5242 | - When the user tries to print a rename in a function while there | |
dda83cd7 SM |
5243 | is another rename entity defined in a package: Normally, the |
5244 | rename in the function has precedence over the rename in the | |
5245 | package, so the latter should be removed from the list. This is | |
5246 | currently not the case. | |
5247 | ||
96d887e8 | 5248 | - This function will incorrectly remove valid renames if |
dda83cd7 SM |
5249 | the CURRENT_BLOCK corresponds to a function which symbol name |
5250 | has been changed by an "Export" pragma. As a consequence, | |
5251 | the user will be unable to print such rename entities. */ | |
4c4b4cd2 | 5252 | |
d1183b06 | 5253 | static void |
54d343a2 TT |
5254 | remove_irrelevant_renamings (std::vector<struct block_symbol> *syms, |
5255 | const struct block *current_block) | |
4c4b4cd2 PH |
5256 | { |
5257 | struct symbol *current_function; | |
0d5cff50 | 5258 | const char *current_function_name; |
4c4b4cd2 | 5259 | int i; |
aeb5907d JB |
5260 | int is_new_style_renaming; |
5261 | ||
5262 | /* If there is both a renaming foo___XR... encoded as a variable and | |
5263 | a simple variable foo in the same block, discard the latter. | |
0963b4bd | 5264 | First, zero out such symbols, then compress. */ |
aeb5907d | 5265 | is_new_style_renaming = 0; |
54d343a2 | 5266 | for (i = 0; i < syms->size (); i += 1) |
aeb5907d | 5267 | { |
54d343a2 TT |
5268 | struct symbol *sym = (*syms)[i].symbol; |
5269 | const struct block *block = (*syms)[i].block; | |
aeb5907d JB |
5270 | const char *name; |
5271 | const char *suffix; | |
5272 | ||
66d7f48f | 5273 | if (sym == NULL || sym->aclass () == LOC_TYPEDEF) |
aeb5907d | 5274 | continue; |
987012b8 | 5275 | name = sym->linkage_name (); |
aeb5907d JB |
5276 | suffix = strstr (name, "___XR"); |
5277 | ||
5278 | if (suffix != NULL) | |
5279 | { | |
5280 | int name_len = suffix - name; | |
5281 | int j; | |
5b4ee69b | 5282 | |
aeb5907d | 5283 | is_new_style_renaming = 1; |
54d343a2 TT |
5284 | for (j = 0; j < syms->size (); j += 1) |
5285 | if (i != j && (*syms)[j].symbol != NULL | |
987012b8 | 5286 | && strncmp (name, (*syms)[j].symbol->linkage_name (), |
aeb5907d | 5287 | name_len) == 0 |
54d343a2 TT |
5288 | && block == (*syms)[j].block) |
5289 | (*syms)[j].symbol = NULL; | |
aeb5907d JB |
5290 | } |
5291 | } | |
5292 | if (is_new_style_renaming) | |
5293 | { | |
5294 | int j, k; | |
5295 | ||
54d343a2 TT |
5296 | for (j = k = 0; j < syms->size (); j += 1) |
5297 | if ((*syms)[j].symbol != NULL) | |
aeb5907d | 5298 | { |
54d343a2 | 5299 | (*syms)[k] = (*syms)[j]; |
aeb5907d JB |
5300 | k += 1; |
5301 | } | |
d1183b06 TT |
5302 | syms->resize (k); |
5303 | return; | |
aeb5907d | 5304 | } |
4c4b4cd2 PH |
5305 | |
5306 | /* Extract the function name associated to CURRENT_BLOCK. | |
5307 | Abort if unable to do so. */ | |
76a01679 | 5308 | |
4c4b4cd2 | 5309 | if (current_block == NULL) |
d1183b06 | 5310 | return; |
76a01679 | 5311 | |
7f0df278 | 5312 | current_function = block_linkage_function (current_block); |
4c4b4cd2 | 5313 | if (current_function == NULL) |
d1183b06 | 5314 | return; |
4c4b4cd2 | 5315 | |
987012b8 | 5316 | current_function_name = current_function->linkage_name (); |
4c4b4cd2 | 5317 | if (current_function_name == NULL) |
d1183b06 | 5318 | return; |
4c4b4cd2 PH |
5319 | |
5320 | /* Check each of the symbols, and remove it from the list if it is | |
5321 | a type corresponding to a renaming that is out of the scope of | |
5322 | the current block. */ | |
5323 | ||
5324 | i = 0; | |
54d343a2 | 5325 | while (i < syms->size ()) |
4c4b4cd2 | 5326 | { |
54d343a2 | 5327 | if (ada_parse_renaming ((*syms)[i].symbol, NULL, NULL, NULL) |
dda83cd7 SM |
5328 | == ADA_OBJECT_RENAMING |
5329 | && old_renaming_is_invisible ((*syms)[i].symbol, | |
54d343a2 TT |
5330 | current_function_name)) |
5331 | syms->erase (syms->begin () + i); | |
4c4b4cd2 | 5332 | else |
dda83cd7 | 5333 | i += 1; |
4c4b4cd2 | 5334 | } |
4c4b4cd2 PH |
5335 | } |
5336 | ||
d1183b06 | 5337 | /* Add to RESULT all symbols from BLOCK (and its super-blocks) |
cd458349 | 5338 | whose name and domain match LOOKUP_NAME and DOMAIN respectively. |
339c13b6 | 5339 | |
cd458349 | 5340 | Note: This function assumes that RESULT is empty. */ |
339c13b6 JB |
5341 | |
5342 | static void | |
d1183b06 | 5343 | ada_add_local_symbols (std::vector<struct block_symbol> &result, |
b5ec771e PA |
5344 | const lookup_name_info &lookup_name, |
5345 | const struct block *block, domain_enum domain) | |
339c13b6 | 5346 | { |
339c13b6 JB |
5347 | while (block != NULL) |
5348 | { | |
d1183b06 | 5349 | ada_add_block_symbols (result, block, lookup_name, domain, NULL); |
339c13b6 | 5350 | |
ba8694b6 TT |
5351 | /* If we found a non-function match, assume that's the one. We |
5352 | only check this when finding a function boundary, so that we | |
5353 | can accumulate all results from intervening blocks first. */ | |
6c00f721 | 5354 | if (block->function () != nullptr && is_nonfunction (result)) |
dda83cd7 | 5355 | return; |
339c13b6 | 5356 | |
f135fe72 | 5357 | block = block->superblock (); |
339c13b6 | 5358 | } |
339c13b6 JB |
5359 | } |
5360 | ||
2315bb2d | 5361 | /* An object of this type is used as the callback argument when |
40658b94 | 5362 | calling the map_matching_symbols method. */ |
ccefe4c4 | 5363 | |
40658b94 | 5364 | struct match_data |
ccefe4c4 | 5365 | { |
1bfa81ac TT |
5366 | explicit match_data (std::vector<struct block_symbol> *rp) |
5367 | : resultp (rp) | |
5368 | { | |
5369 | } | |
5370 | DISABLE_COPY_AND_ASSIGN (match_data); | |
5371 | ||
2315bb2d TT |
5372 | bool operator() (struct block_symbol *bsym); |
5373 | ||
1bfa81ac | 5374 | struct objfile *objfile = nullptr; |
d1183b06 | 5375 | std::vector<struct block_symbol> *resultp; |
1bfa81ac | 5376 | struct symbol *arg_sym = nullptr; |
1178743e | 5377 | bool found_sym = false; |
ccefe4c4 TT |
5378 | }; |
5379 | ||
2315bb2d TT |
5380 | /* A callback for add_nonlocal_symbols that adds symbol, found in |
5381 | BSYM, to a list of symbols. */ | |
ccefe4c4 | 5382 | |
2315bb2d TT |
5383 | bool |
5384 | match_data::operator() (struct block_symbol *bsym) | |
ccefe4c4 | 5385 | { |
199b4314 TT |
5386 | const struct block *block = bsym->block; |
5387 | struct symbol *sym = bsym->symbol; | |
5388 | ||
40658b94 PH |
5389 | if (sym == NULL) |
5390 | { | |
2315bb2d | 5391 | if (!found_sym && arg_sym != NULL) |
dae58e04 | 5392 | add_defn_to_vec (*resultp, arg_sym, block); |
2315bb2d TT |
5393 | found_sym = false; |
5394 | arg_sym = NULL; | |
40658b94 PH |
5395 | } |
5396 | else | |
5397 | { | |
66d7f48f | 5398 | if (sym->aclass () == LOC_UNRESOLVED) |
199b4314 | 5399 | return true; |
d9743061 | 5400 | else if (sym->is_argument ()) |
2315bb2d | 5401 | arg_sym = sym; |
40658b94 PH |
5402 | else |
5403 | { | |
2315bb2d | 5404 | found_sym = true; |
dae58e04 | 5405 | add_defn_to_vec (*resultp, sym, block); |
40658b94 PH |
5406 | } |
5407 | } | |
199b4314 | 5408 | return true; |
40658b94 PH |
5409 | } |
5410 | ||
b5ec771e PA |
5411 | /* Helper for add_nonlocal_symbols. Find symbols in DOMAIN which are |
5412 | targeted by renamings matching LOOKUP_NAME in BLOCK. Add these | |
1bfa81ac | 5413 | symbols to RESULT. Return whether we found such symbols. */ |
22cee43f PMR |
5414 | |
5415 | static int | |
d1183b06 | 5416 | ada_add_block_renamings (std::vector<struct block_symbol> &result, |
22cee43f | 5417 | const struct block *block, |
b5ec771e PA |
5418 | const lookup_name_info &lookup_name, |
5419 | domain_enum domain) | |
22cee43f PMR |
5420 | { |
5421 | struct using_direct *renaming; | |
d1183b06 | 5422 | int defns_mark = result.size (); |
22cee43f | 5423 | |
b5ec771e PA |
5424 | symbol_name_matcher_ftype *name_match |
5425 | = ada_get_symbol_name_matcher (lookup_name); | |
5426 | ||
22cee43f PMR |
5427 | for (renaming = block_using (block); |
5428 | renaming != NULL; | |
5429 | renaming = renaming->next) | |
5430 | { | |
5431 | const char *r_name; | |
22cee43f PMR |
5432 | |
5433 | /* Avoid infinite recursions: skip this renaming if we are actually | |
5434 | already traversing it. | |
5435 | ||
5436 | Currently, symbol lookup in Ada don't use the namespace machinery from | |
5437 | C++/Fortran support: skip namespace imports that use them. */ | |
5438 | if (renaming->searched | |
5439 | || (renaming->import_src != NULL | |
5440 | && renaming->import_src[0] != '\0') | |
5441 | || (renaming->import_dest != NULL | |
5442 | && renaming->import_dest[0] != '\0')) | |
5443 | continue; | |
5444 | renaming->searched = 1; | |
5445 | ||
5446 | /* TODO: here, we perform another name-based symbol lookup, which can | |
5447 | pull its own multiple overloads. In theory, we should be able to do | |
5448 | better in this case since, in DWARF, DW_AT_import is a DIE reference, | |
5449 | not a simple name. But in order to do this, we would need to enhance | |
5450 | the DWARF reader to associate a symbol to this renaming, instead of a | |
5451 | name. So, for now, we do something simpler: re-use the C++/Fortran | |
5452 | namespace machinery. */ | |
5453 | r_name = (renaming->alias != NULL | |
5454 | ? renaming->alias | |
5455 | : renaming->declaration); | |
b5ec771e PA |
5456 | if (name_match (r_name, lookup_name, NULL)) |
5457 | { | |
5458 | lookup_name_info decl_lookup_name (renaming->declaration, | |
5459 | lookup_name.match_type ()); | |
d1183b06 | 5460 | ada_add_all_symbols (result, block, decl_lookup_name, domain, |
b5ec771e PA |
5461 | 1, NULL); |
5462 | } | |
22cee43f PMR |
5463 | renaming->searched = 0; |
5464 | } | |
d1183b06 | 5465 | return result.size () != defns_mark; |
22cee43f PMR |
5466 | } |
5467 | ||
db230ce3 JB |
5468 | /* Implements compare_names, but only applying the comparision using |
5469 | the given CASING. */ | |
5b4ee69b | 5470 | |
40658b94 | 5471 | static int |
db230ce3 JB |
5472 | compare_names_with_case (const char *string1, const char *string2, |
5473 | enum case_sensitivity casing) | |
40658b94 PH |
5474 | { |
5475 | while (*string1 != '\0' && *string2 != '\0') | |
5476 | { | |
db230ce3 JB |
5477 | char c1, c2; |
5478 | ||
40658b94 PH |
5479 | if (isspace (*string1) || isspace (*string2)) |
5480 | return strcmp_iw_ordered (string1, string2); | |
db230ce3 JB |
5481 | |
5482 | if (casing == case_sensitive_off) | |
5483 | { | |
5484 | c1 = tolower (*string1); | |
5485 | c2 = tolower (*string2); | |
5486 | } | |
5487 | else | |
5488 | { | |
5489 | c1 = *string1; | |
5490 | c2 = *string2; | |
5491 | } | |
5492 | if (c1 != c2) | |
40658b94 | 5493 | break; |
db230ce3 | 5494 | |
40658b94 PH |
5495 | string1 += 1; |
5496 | string2 += 1; | |
5497 | } | |
db230ce3 | 5498 | |
40658b94 PH |
5499 | switch (*string1) |
5500 | { | |
5501 | case '(': | |
5502 | return strcmp_iw_ordered (string1, string2); | |
5503 | case '_': | |
5504 | if (*string2 == '\0') | |
5505 | { | |
052874e8 | 5506 | if (is_name_suffix (string1)) |
40658b94 PH |
5507 | return 0; |
5508 | else | |
1a1d5513 | 5509 | return 1; |
40658b94 | 5510 | } |
dbb8534f | 5511 | /* FALLTHROUGH */ |
40658b94 PH |
5512 | default: |
5513 | if (*string2 == '(') | |
5514 | return strcmp_iw_ordered (string1, string2); | |
5515 | else | |
db230ce3 JB |
5516 | { |
5517 | if (casing == case_sensitive_off) | |
5518 | return tolower (*string1) - tolower (*string2); | |
5519 | else | |
5520 | return *string1 - *string2; | |
5521 | } | |
40658b94 | 5522 | } |
ccefe4c4 TT |
5523 | } |
5524 | ||
db230ce3 JB |
5525 | /* Compare STRING1 to STRING2, with results as for strcmp. |
5526 | Compatible with strcmp_iw_ordered in that... | |
5527 | ||
5528 | strcmp_iw_ordered (STRING1, STRING2) <= 0 | |
5529 | ||
5530 | ... implies... | |
5531 | ||
5532 | compare_names (STRING1, STRING2) <= 0 | |
5533 | ||
5534 | (they may differ as to what symbols compare equal). */ | |
5535 | ||
5536 | static int | |
5537 | compare_names (const char *string1, const char *string2) | |
5538 | { | |
5539 | int result; | |
5540 | ||
5541 | /* Similar to what strcmp_iw_ordered does, we need to perform | |
5542 | a case-insensitive comparison first, and only resort to | |
5543 | a second, case-sensitive, comparison if the first one was | |
5544 | not sufficient to differentiate the two strings. */ | |
5545 | ||
5546 | result = compare_names_with_case (string1, string2, case_sensitive_off); | |
5547 | if (result == 0) | |
5548 | result = compare_names_with_case (string1, string2, case_sensitive_on); | |
5549 | ||
5550 | return result; | |
5551 | } | |
5552 | ||
b5ec771e PA |
5553 | /* Convenience function to get at the Ada encoded lookup name for |
5554 | LOOKUP_NAME, as a C string. */ | |
5555 | ||
5556 | static const char * | |
5557 | ada_lookup_name (const lookup_name_info &lookup_name) | |
5558 | { | |
5559 | return lookup_name.ada ().lookup_name ().c_str (); | |
5560 | } | |
5561 | ||
0b7b2c2a TT |
5562 | /* A helper for add_nonlocal_symbols. Call expand_matching_symbols |
5563 | for OBJFILE, then walk the objfile's symtabs and update the | |
5564 | results. */ | |
5565 | ||
5566 | static void | |
5567 | map_matching_symbols (struct objfile *objfile, | |
5568 | const lookup_name_info &lookup_name, | |
5569 | bool is_wild_match, | |
5570 | domain_enum domain, | |
5571 | int global, | |
5572 | match_data &data) | |
5573 | { | |
5574 | data.objfile = objfile; | |
5575 | objfile->expand_matching_symbols (lookup_name, domain, global, | |
5576 | is_wild_match ? nullptr : compare_names); | |
5577 | ||
5578 | const int block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
5579 | for (compunit_symtab *symtab : objfile->compunits ()) | |
5580 | { | |
5581 | const struct block *block | |
63d609de | 5582 | = symtab->blockvector ()->block (block_kind); |
0b7b2c2a TT |
5583 | if (!iterate_over_symbols_terminated (block, lookup_name, |
5584 | domain, data)) | |
5585 | break; | |
5586 | } | |
5587 | } | |
5588 | ||
1bfa81ac | 5589 | /* Add to RESULT all non-local symbols whose name and domain match |
b5ec771e PA |
5590 | LOOKUP_NAME and DOMAIN respectively. The search is performed on |
5591 | GLOBAL_BLOCK symbols if GLOBAL is non-zero, or on STATIC_BLOCK | |
5592 | symbols otherwise. */ | |
339c13b6 JB |
5593 | |
5594 | static void | |
d1183b06 | 5595 | add_nonlocal_symbols (std::vector<struct block_symbol> &result, |
b5ec771e PA |
5596 | const lookup_name_info &lookup_name, |
5597 | domain_enum domain, int global) | |
339c13b6 | 5598 | { |
1bfa81ac | 5599 | struct match_data data (&result); |
339c13b6 | 5600 | |
b5ec771e PA |
5601 | bool is_wild_match = lookup_name.ada ().wild_match_p (); |
5602 | ||
2030c079 | 5603 | for (objfile *objfile : current_program_space->objfiles ()) |
40658b94 | 5604 | { |
0b7b2c2a TT |
5605 | map_matching_symbols (objfile, lookup_name, is_wild_match, domain, |
5606 | global, data); | |
22cee43f | 5607 | |
b669c953 | 5608 | for (compunit_symtab *cu : objfile->compunits ()) |
22cee43f PMR |
5609 | { |
5610 | const struct block *global_block | |
63d609de | 5611 | = cu->blockvector ()->global_block (); |
22cee43f | 5612 | |
d1183b06 | 5613 | if (ada_add_block_renamings (result, global_block, lookup_name, |
b5ec771e | 5614 | domain)) |
1178743e | 5615 | data.found_sym = true; |
22cee43f | 5616 | } |
40658b94 PH |
5617 | } |
5618 | ||
d1183b06 | 5619 | if (result.empty () && global && !is_wild_match) |
40658b94 | 5620 | { |
b5ec771e | 5621 | const char *name = ada_lookup_name (lookup_name); |
e0802d59 TT |
5622 | std::string bracket_name = std::string ("<_ada_") + name + '>'; |
5623 | lookup_name_info name1 (bracket_name, symbol_name_match_type::FULL); | |
b5ec771e | 5624 | |
2030c079 | 5625 | for (objfile *objfile : current_program_space->objfiles ()) |
0b7b2c2a TT |
5626 | map_matching_symbols (objfile, name1, false, domain, global, data); |
5627 | } | |
339c13b6 JB |
5628 | } |
5629 | ||
b5ec771e PA |
5630 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if |
5631 | FULL_SEARCH is non-zero, enclosing scope and in global scopes, | |
1bfa81ac | 5632 | returning the number of matches. Add these to RESULT. |
4eeaa230 | 5633 | |
22cee43f PMR |
5634 | When FULL_SEARCH is non-zero, any non-function/non-enumeral |
5635 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
4c4b4cd2 | 5636 | is the one match returned (no other matches in that or |
d9680e73 | 5637 | enclosing blocks is returned). If there are any matches in or |
22cee43f | 5638 | surrounding BLOCK, then these alone are returned. |
4eeaa230 | 5639 | |
b5ec771e PA |
5640 | Names prefixed with "standard__" are handled specially: |
5641 | "standard__" is first stripped off (by the lookup_name | |
5642 | constructor), and only static and global symbols are searched. | |
14f9c5c9 | 5643 | |
22cee43f PMR |
5644 | If MADE_GLOBAL_LOOKUP_P is non-null, set it before return to whether we had |
5645 | to lookup global symbols. */ | |
5646 | ||
5647 | static void | |
d1183b06 | 5648 | ada_add_all_symbols (std::vector<struct block_symbol> &result, |
22cee43f | 5649 | const struct block *block, |
b5ec771e | 5650 | const lookup_name_info &lookup_name, |
22cee43f PMR |
5651 | domain_enum domain, |
5652 | int full_search, | |
5653 | int *made_global_lookup_p) | |
14f9c5c9 AS |
5654 | { |
5655 | struct symbol *sym; | |
14f9c5c9 | 5656 | |
22cee43f PMR |
5657 | if (made_global_lookup_p) |
5658 | *made_global_lookup_p = 0; | |
339c13b6 JB |
5659 | |
5660 | /* Special case: If the user specifies a symbol name inside package | |
5661 | Standard, do a non-wild matching of the symbol name without | |
5662 | the "standard__" prefix. This was primarily introduced in order | |
5663 | to allow the user to specifically access the standard exceptions | |
5664 | using, for instance, Standard.Constraint_Error when Constraint_Error | |
5665 | is ambiguous (due to the user defining its own Constraint_Error | |
5666 | entity inside its program). */ | |
b5ec771e PA |
5667 | if (lookup_name.ada ().standard_p ()) |
5668 | block = NULL; | |
4c4b4cd2 | 5669 | |
339c13b6 | 5670 | /* Check the non-global symbols. If we have ANY match, then we're done. */ |
14f9c5c9 | 5671 | |
4eeaa230 DE |
5672 | if (block != NULL) |
5673 | { | |
5674 | if (full_search) | |
d1183b06 | 5675 | ada_add_local_symbols (result, lookup_name, block, domain); |
4eeaa230 DE |
5676 | else |
5677 | { | |
5678 | /* In the !full_search case we're are being called by | |
4009ee92 | 5679 | iterate_over_symbols, and we don't want to search |
4eeaa230 | 5680 | superblocks. */ |
d1183b06 | 5681 | ada_add_block_symbols (result, block, lookup_name, domain, NULL); |
4eeaa230 | 5682 | } |
d1183b06 | 5683 | if (!result.empty () || !full_search) |
22cee43f | 5684 | return; |
4eeaa230 | 5685 | } |
d2e4a39e | 5686 | |
339c13b6 JB |
5687 | /* No non-global symbols found. Check our cache to see if we have |
5688 | already performed this search before. If we have, then return | |
5689 | the same result. */ | |
5690 | ||
b5ec771e PA |
5691 | if (lookup_cached_symbol (ada_lookup_name (lookup_name), |
5692 | domain, &sym, &block)) | |
4c4b4cd2 PH |
5693 | { |
5694 | if (sym != NULL) | |
d1183b06 | 5695 | add_defn_to_vec (result, sym, block); |
22cee43f | 5696 | return; |
4c4b4cd2 | 5697 | } |
14f9c5c9 | 5698 | |
22cee43f PMR |
5699 | if (made_global_lookup_p) |
5700 | *made_global_lookup_p = 1; | |
b1eedac9 | 5701 | |
339c13b6 JB |
5702 | /* Search symbols from all global blocks. */ |
5703 | ||
d1183b06 | 5704 | add_nonlocal_symbols (result, lookup_name, domain, 1); |
d2e4a39e | 5705 | |
4c4b4cd2 | 5706 | /* Now add symbols from all per-file blocks if we've gotten no hits |
339c13b6 | 5707 | (not strictly correct, but perhaps better than an error). */ |
d2e4a39e | 5708 | |
d1183b06 TT |
5709 | if (result.empty ()) |
5710 | add_nonlocal_symbols (result, lookup_name, domain, 0); | |
22cee43f PMR |
5711 | } |
5712 | ||
b5ec771e | 5713 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if FULL_SEARCH |
d1183b06 TT |
5714 | is non-zero, enclosing scope and in global scopes. |
5715 | ||
5716 | Returns (SYM,BLOCK) tuples, indicating the symbols found and the | |
5717 | blocks and symbol tables (if any) in which they were found. | |
22cee43f PMR |
5718 | |
5719 | When full_search is non-zero, any non-function/non-enumeral | |
5720 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
5721 | is the one match returned (no other matches in that or | |
5722 | enclosing blocks is returned). If there are any matches in or | |
5723 | surrounding BLOCK, then these alone are returned. | |
5724 | ||
5725 | Names prefixed with "standard__" are handled specially: "standard__" | |
5726 | is first stripped off, and only static and global symbols are searched. */ | |
5727 | ||
d1183b06 | 5728 | static std::vector<struct block_symbol> |
b5ec771e PA |
5729 | ada_lookup_symbol_list_worker (const lookup_name_info &lookup_name, |
5730 | const struct block *block, | |
22cee43f | 5731 | domain_enum domain, |
22cee43f PMR |
5732 | int full_search) |
5733 | { | |
22cee43f | 5734 | int syms_from_global_search; |
d1183b06 | 5735 | std::vector<struct block_symbol> results; |
22cee43f | 5736 | |
d1183b06 | 5737 | ada_add_all_symbols (results, block, lookup_name, |
b5ec771e | 5738 | domain, full_search, &syms_from_global_search); |
14f9c5c9 | 5739 | |
d1183b06 | 5740 | remove_extra_symbols (&results); |
4c4b4cd2 | 5741 | |
d1183b06 | 5742 | if (results.empty () && full_search && syms_from_global_search) |
b5ec771e | 5743 | cache_symbol (ada_lookup_name (lookup_name), domain, NULL, NULL); |
14f9c5c9 | 5744 | |
d1183b06 | 5745 | if (results.size () == 1 && full_search && syms_from_global_search) |
b5ec771e | 5746 | cache_symbol (ada_lookup_name (lookup_name), domain, |
d1183b06 | 5747 | results[0].symbol, results[0].block); |
ec6a20c2 | 5748 | |
d1183b06 TT |
5749 | remove_irrelevant_renamings (&results, block); |
5750 | return results; | |
14f9c5c9 AS |
5751 | } |
5752 | ||
b5ec771e | 5753 | /* Find symbols in DOMAIN matching NAME, in BLOCK and enclosing scope and |
d1183b06 | 5754 | in global scopes, returning (SYM,BLOCK) tuples. |
ec6a20c2 | 5755 | |
4eeaa230 DE |
5756 | See ada_lookup_symbol_list_worker for further details. */ |
5757 | ||
d1183b06 | 5758 | std::vector<struct block_symbol> |
b5ec771e | 5759 | ada_lookup_symbol_list (const char *name, const struct block *block, |
d1183b06 | 5760 | domain_enum domain) |
4eeaa230 | 5761 | { |
b5ec771e PA |
5762 | symbol_name_match_type name_match_type = name_match_type_from_name (name); |
5763 | lookup_name_info lookup_name (name, name_match_type); | |
5764 | ||
d1183b06 | 5765 | return ada_lookup_symbol_list_worker (lookup_name, block, domain, 1); |
4eeaa230 DE |
5766 | } |
5767 | ||
4e5c77fe JB |
5768 | /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set |
5769 | to 1, but choosing the first symbol found if there are multiple | |
5770 | choices. | |
5771 | ||
5e2336be JB |
5772 | The result is stored in *INFO, which must be non-NULL. |
5773 | If no match is found, INFO->SYM is set to NULL. */ | |
4e5c77fe JB |
5774 | |
5775 | void | |
5776 | ada_lookup_encoded_symbol (const char *name, const struct block *block, | |
fe978cb0 | 5777 | domain_enum domain, |
d12307c1 | 5778 | struct block_symbol *info) |
14f9c5c9 | 5779 | { |
b5ec771e PA |
5780 | /* Since we already have an encoded name, wrap it in '<>' to force a |
5781 | verbatim match. Otherwise, if the name happens to not look like | |
5782 | an encoded name (because it doesn't include a "__"), | |
5783 | ada_lookup_name_info would re-encode/fold it again, and that | |
5784 | would e.g., incorrectly lowercase object renaming names like | |
5785 | "R28b" -> "r28b". */ | |
12932e2c | 5786 | std::string verbatim = add_angle_brackets (name); |
b5ec771e | 5787 | |
5e2336be | 5788 | gdb_assert (info != NULL); |
65392b3e | 5789 | *info = ada_lookup_symbol (verbatim.c_str (), block, domain); |
4e5c77fe | 5790 | } |
aeb5907d JB |
5791 | |
5792 | /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing | |
5793 | scope and in global scopes, or NULL if none. NAME is folded and | |
5794 | encoded first. Otherwise, the result is as for ada_lookup_symbol_list, | |
65392b3e | 5795 | choosing the first symbol if there are multiple choices. */ |
4e5c77fe | 5796 | |
d12307c1 | 5797 | struct block_symbol |
aeb5907d | 5798 | ada_lookup_symbol (const char *name, const struct block *block0, |
dda83cd7 | 5799 | domain_enum domain) |
aeb5907d | 5800 | { |
d1183b06 TT |
5801 | std::vector<struct block_symbol> candidates |
5802 | = ada_lookup_symbol_list (name, block0, domain); | |
f98fc17b | 5803 | |
d1183b06 | 5804 | if (candidates.empty ()) |
54d343a2 | 5805 | return {}; |
f98fc17b | 5806 | |
dae58e04 | 5807 | return candidates[0]; |
4c4b4cd2 | 5808 | } |
14f9c5c9 | 5809 | |
14f9c5c9 | 5810 | |
4c4b4cd2 PH |
5811 | /* True iff STR is a possible encoded suffix of a normal Ada name |
5812 | that is to be ignored for matching purposes. Suffixes of parallel | |
5813 | names (e.g., XVE) are not included here. Currently, the possible suffixes | |
5823c3ef | 5814 | are given by any of the regular expressions: |
4c4b4cd2 | 5815 | |
babe1480 JB |
5816 | [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux] |
5817 | ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX] | |
9ac7f98e | 5818 | TKB [subprogram suffix for task bodies] |
babe1480 | 5819 | _E[0-9]+[bs]$ [protected object entry suffixes] |
61ee279c | 5820 | (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$ |
babe1480 JB |
5821 | |
5822 | Also, any leading "__[0-9]+" sequence is skipped before the suffix | |
5823 | match is performed. This sequence is used to differentiate homonyms, | |
5824 | is an optional part of a valid name suffix. */ | |
4c4b4cd2 | 5825 | |
14f9c5c9 | 5826 | static int |
d2e4a39e | 5827 | is_name_suffix (const char *str) |
14f9c5c9 AS |
5828 | { |
5829 | int k; | |
4c4b4cd2 PH |
5830 | const char *matching; |
5831 | const int len = strlen (str); | |
5832 | ||
babe1480 JB |
5833 | /* Skip optional leading __[0-9]+. */ |
5834 | ||
4c4b4cd2 PH |
5835 | if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2])) |
5836 | { | |
babe1480 JB |
5837 | str += 3; |
5838 | while (isdigit (str[0])) | |
dda83cd7 | 5839 | str += 1; |
4c4b4cd2 | 5840 | } |
babe1480 JB |
5841 | |
5842 | /* [.$][0-9]+ */ | |
4c4b4cd2 | 5843 | |
babe1480 | 5844 | if (str[0] == '.' || str[0] == '$') |
4c4b4cd2 | 5845 | { |
babe1480 | 5846 | matching = str + 1; |
4c4b4cd2 | 5847 | while (isdigit (matching[0])) |
dda83cd7 | 5848 | matching += 1; |
4c4b4cd2 | 5849 | if (matching[0] == '\0') |
dda83cd7 | 5850 | return 1; |
4c4b4cd2 PH |
5851 | } |
5852 | ||
5853 | /* ___[0-9]+ */ | |
babe1480 | 5854 | |
4c4b4cd2 PH |
5855 | if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_') |
5856 | { | |
5857 | matching = str + 3; | |
5858 | while (isdigit (matching[0])) | |
dda83cd7 | 5859 | matching += 1; |
4c4b4cd2 | 5860 | if (matching[0] == '\0') |
dda83cd7 | 5861 | return 1; |
4c4b4cd2 PH |
5862 | } |
5863 | ||
9ac7f98e JB |
5864 | /* "TKB" suffixes are used for subprograms implementing task bodies. */ |
5865 | ||
5866 | if (strcmp (str, "TKB") == 0) | |
5867 | return 1; | |
5868 | ||
529cad9c PH |
5869 | #if 0 |
5870 | /* FIXME: brobecker/2005-09-23: Protected Object subprograms end | |
0963b4bd MS |
5871 | with a N at the end. Unfortunately, the compiler uses the same |
5872 | convention for other internal types it creates. So treating | |
529cad9c | 5873 | all entity names that end with an "N" as a name suffix causes |
0963b4bd MS |
5874 | some regressions. For instance, consider the case of an enumerated |
5875 | type. To support the 'Image attribute, it creates an array whose | |
529cad9c PH |
5876 | name ends with N. |
5877 | Having a single character like this as a suffix carrying some | |
0963b4bd | 5878 | information is a bit risky. Perhaps we should change the encoding |
529cad9c PH |
5879 | to be something like "_N" instead. In the meantime, do not do |
5880 | the following check. */ | |
5881 | /* Protected Object Subprograms */ | |
5882 | if (len == 1 && str [0] == 'N') | |
5883 | return 1; | |
5884 | #endif | |
5885 | ||
5886 | /* _E[0-9]+[bs]$ */ | |
5887 | if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2])) | |
5888 | { | |
5889 | matching = str + 3; | |
5890 | while (isdigit (matching[0])) | |
dda83cd7 | 5891 | matching += 1; |
529cad9c | 5892 | if ((matching[0] == 'b' || matching[0] == 's') |
dda83cd7 SM |
5893 | && matching [1] == '\0') |
5894 | return 1; | |
529cad9c PH |
5895 | } |
5896 | ||
4c4b4cd2 PH |
5897 | /* ??? We should not modify STR directly, as we are doing below. This |
5898 | is fine in this case, but may become problematic later if we find | |
5899 | that this alternative did not work, and want to try matching | |
5900 | another one from the begining of STR. Since we modified it, we | |
5901 | won't be able to find the begining of the string anymore! */ | |
14f9c5c9 AS |
5902 | if (str[0] == 'X') |
5903 | { | |
5904 | str += 1; | |
d2e4a39e | 5905 | while (str[0] != '_' && str[0] != '\0') |
dda83cd7 SM |
5906 | { |
5907 | if (str[0] != 'n' && str[0] != 'b') | |
5908 | return 0; | |
5909 | str += 1; | |
5910 | } | |
14f9c5c9 | 5911 | } |
babe1480 | 5912 | |
14f9c5c9 AS |
5913 | if (str[0] == '\000') |
5914 | return 1; | |
babe1480 | 5915 | |
d2e4a39e | 5916 | if (str[0] == '_') |
14f9c5c9 AS |
5917 | { |
5918 | if (str[1] != '_' || str[2] == '\000') | |
dda83cd7 | 5919 | return 0; |
d2e4a39e | 5920 | if (str[2] == '_') |
dda83cd7 SM |
5921 | { |
5922 | if (strcmp (str + 3, "JM") == 0) | |
5923 | return 1; | |
5924 | /* FIXME: brobecker/2004-09-30: GNAT will soon stop using | |
5925 | the LJM suffix in favor of the JM one. But we will | |
5926 | still accept LJM as a valid suffix for a reasonable | |
5927 | amount of time, just to allow ourselves to debug programs | |
5928 | compiled using an older version of GNAT. */ | |
5929 | if (strcmp (str + 3, "LJM") == 0) | |
5930 | return 1; | |
5931 | if (str[3] != 'X') | |
5932 | return 0; | |
5933 | if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B' | |
5934 | || str[4] == 'U' || str[4] == 'P') | |
5935 | return 1; | |
5936 | if (str[4] == 'R' && str[5] != 'T') | |
5937 | return 1; | |
5938 | return 0; | |
5939 | } | |
4c4b4cd2 | 5940 | if (!isdigit (str[2])) |
dda83cd7 | 5941 | return 0; |
4c4b4cd2 | 5942 | for (k = 3; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5943 | if (!isdigit (str[k]) && str[k] != '_') |
5944 | return 0; | |
14f9c5c9 AS |
5945 | return 1; |
5946 | } | |
4c4b4cd2 | 5947 | if (str[0] == '$' && isdigit (str[1])) |
14f9c5c9 | 5948 | { |
4c4b4cd2 | 5949 | for (k = 2; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5950 | if (!isdigit (str[k]) && str[k] != '_') |
5951 | return 0; | |
14f9c5c9 AS |
5952 | return 1; |
5953 | } | |
5954 | return 0; | |
5955 | } | |
d2e4a39e | 5956 | |
aeb5907d JB |
5957 | /* Return non-zero if the string starting at NAME and ending before |
5958 | NAME_END contains no capital letters. */ | |
529cad9c PH |
5959 | |
5960 | static int | |
5961 | is_valid_name_for_wild_match (const char *name0) | |
5962 | { | |
f945dedf | 5963 | std::string decoded_name = ada_decode (name0); |
529cad9c PH |
5964 | int i; |
5965 | ||
5823c3ef JB |
5966 | /* If the decoded name starts with an angle bracket, it means that |
5967 | NAME0 does not follow the GNAT encoding format. It should then | |
5968 | not be allowed as a possible wild match. */ | |
5969 | if (decoded_name[0] == '<') | |
5970 | return 0; | |
5971 | ||
529cad9c PH |
5972 | for (i=0; decoded_name[i] != '\0'; i++) |
5973 | if (isalpha (decoded_name[i]) && !islower (decoded_name[i])) | |
5974 | return 0; | |
5975 | ||
5976 | return 1; | |
5977 | } | |
5978 | ||
59c8a30b JB |
5979 | /* Advance *NAMEP to next occurrence in the string NAME0 of the TARGET0 |
5980 | character which could start a simple name. Assumes that *NAMEP points | |
5981 | somewhere inside the string beginning at NAME0. */ | |
4c4b4cd2 | 5982 | |
14f9c5c9 | 5983 | static int |
59c8a30b | 5984 | advance_wild_match (const char **namep, const char *name0, char target0) |
14f9c5c9 | 5985 | { |
73589123 | 5986 | const char *name = *namep; |
5b4ee69b | 5987 | |
5823c3ef | 5988 | while (1) |
14f9c5c9 | 5989 | { |
59c8a30b | 5990 | char t0, t1; |
73589123 PH |
5991 | |
5992 | t0 = *name; | |
5993 | if (t0 == '_') | |
5994 | { | |
5995 | t1 = name[1]; | |
5996 | if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9')) | |
5997 | { | |
5998 | name += 1; | |
61012eef | 5999 | if (name == name0 + 5 && startswith (name0, "_ada")) |
73589123 PH |
6000 | break; |
6001 | else | |
6002 | name += 1; | |
6003 | } | |
aa27d0b3 JB |
6004 | else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z') |
6005 | || name[2] == target0)) | |
73589123 PH |
6006 | { |
6007 | name += 2; | |
6008 | break; | |
6009 | } | |
86b44259 TT |
6010 | else if (t1 == '_' && name[2] == 'B' && name[3] == '_') |
6011 | { | |
6012 | /* Names like "pkg__B_N__name", where N is a number, are | |
6013 | block-local. We can handle these by simply skipping | |
6014 | the "B_" here. */ | |
6015 | name += 4; | |
6016 | } | |
73589123 PH |
6017 | else |
6018 | return 0; | |
6019 | } | |
6020 | else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9')) | |
6021 | name += 1; | |
6022 | else | |
5823c3ef | 6023 | return 0; |
73589123 PH |
6024 | } |
6025 | ||
6026 | *namep = name; | |
6027 | return 1; | |
6028 | } | |
6029 | ||
b5ec771e PA |
6030 | /* Return true iff NAME encodes a name of the form prefix.PATN. |
6031 | Ignores any informational suffixes of NAME (i.e., for which | |
6032 | is_name_suffix is true). Assumes that PATN is a lower-cased Ada | |
6033 | simple name. */ | |
73589123 | 6034 | |
b5ec771e | 6035 | static bool |
73589123 PH |
6036 | wild_match (const char *name, const char *patn) |
6037 | { | |
22e048c9 | 6038 | const char *p; |
73589123 PH |
6039 | const char *name0 = name; |
6040 | ||
81eaa506 TT |
6041 | if (startswith (name, "___ghost_")) |
6042 | name += 9; | |
6043 | ||
73589123 PH |
6044 | while (1) |
6045 | { | |
6046 | const char *match = name; | |
6047 | ||
6048 | if (*name == *patn) | |
6049 | { | |
6050 | for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1) | |
6051 | if (*p != *name) | |
6052 | break; | |
6053 | if (*p == '\0' && is_name_suffix (name)) | |
b5ec771e | 6054 | return match == name0 || is_valid_name_for_wild_match (name0); |
73589123 PH |
6055 | |
6056 | if (name[-1] == '_') | |
6057 | name -= 1; | |
6058 | } | |
6059 | if (!advance_wild_match (&name, name0, *patn)) | |
b5ec771e | 6060 | return false; |
96d887e8 | 6061 | } |
96d887e8 PH |
6062 | } |
6063 | ||
d1183b06 | 6064 | /* Add symbols from BLOCK matching LOOKUP_NAME in DOMAIN to RESULT (if |
b5ec771e | 6065 | necessary). OBJFILE is the section containing BLOCK. */ |
96d887e8 PH |
6066 | |
6067 | static void | |
d1183b06 | 6068 | ada_add_block_symbols (std::vector<struct block_symbol> &result, |
b5ec771e PA |
6069 | const struct block *block, |
6070 | const lookup_name_info &lookup_name, | |
6071 | domain_enum domain, struct objfile *objfile) | |
96d887e8 | 6072 | { |
8157b174 | 6073 | struct block_iterator iter; |
96d887e8 PH |
6074 | /* A matching argument symbol, if any. */ |
6075 | struct symbol *arg_sym; | |
6076 | /* Set true when we find a matching non-argument symbol. */ | |
1178743e | 6077 | bool found_sym; |
96d887e8 PH |
6078 | struct symbol *sym; |
6079 | ||
6080 | arg_sym = NULL; | |
1178743e | 6081 | found_sym = false; |
b5ec771e PA |
6082 | for (sym = block_iter_match_first (block, lookup_name, &iter); |
6083 | sym != NULL; | |
6084 | sym = block_iter_match_next (lookup_name, &iter)) | |
96d887e8 | 6085 | { |
6c9c307c | 6086 | if (symbol_matches_domain (sym->language (), sym->domain (), domain)) |
b5ec771e | 6087 | { |
66d7f48f | 6088 | if (sym->aclass () != LOC_UNRESOLVED) |
b5ec771e | 6089 | { |
d9743061 | 6090 | if (sym->is_argument ()) |
b5ec771e PA |
6091 | arg_sym = sym; |
6092 | else | |
6093 | { | |
1178743e | 6094 | found_sym = true; |
dae58e04 | 6095 | add_defn_to_vec (result, sym, block); |
b5ec771e PA |
6096 | } |
6097 | } | |
6098 | } | |
96d887e8 PH |
6099 | } |
6100 | ||
22cee43f PMR |
6101 | /* Handle renamings. */ |
6102 | ||
d1183b06 | 6103 | if (ada_add_block_renamings (result, block, lookup_name, domain)) |
1178743e | 6104 | found_sym = true; |
22cee43f | 6105 | |
96d887e8 PH |
6106 | if (!found_sym && arg_sym != NULL) |
6107 | { | |
dae58e04 | 6108 | add_defn_to_vec (result, arg_sym, block); |
96d887e8 PH |
6109 | } |
6110 | ||
b5ec771e | 6111 | if (!lookup_name.ada ().wild_match_p ()) |
96d887e8 PH |
6112 | { |
6113 | arg_sym = NULL; | |
1178743e | 6114 | found_sym = false; |
b5ec771e PA |
6115 | const std::string &ada_lookup_name = lookup_name.ada ().lookup_name (); |
6116 | const char *name = ada_lookup_name.c_str (); | |
6117 | size_t name_len = ada_lookup_name.size (); | |
96d887e8 PH |
6118 | |
6119 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
76a01679 | 6120 | { |
dda83cd7 | 6121 | if (symbol_matches_domain (sym->language (), |
6c9c307c | 6122 | sym->domain (), domain)) |
dda83cd7 SM |
6123 | { |
6124 | int cmp; | |
6125 | ||
6126 | cmp = (int) '_' - (int) sym->linkage_name ()[0]; | |
6127 | if (cmp == 0) | |
6128 | { | |
6129 | cmp = !startswith (sym->linkage_name (), "_ada_"); | |
6130 | if (cmp == 0) | |
6131 | cmp = strncmp (name, sym->linkage_name () + 5, | |
6132 | name_len); | |
6133 | } | |
6134 | ||
6135 | if (cmp == 0 | |
6136 | && is_name_suffix (sym->linkage_name () + name_len + 5)) | |
6137 | { | |
66d7f48f | 6138 | if (sym->aclass () != LOC_UNRESOLVED) |
2a2d4dc3 | 6139 | { |
d9743061 | 6140 | if (sym->is_argument ()) |
2a2d4dc3 AS |
6141 | arg_sym = sym; |
6142 | else | |
6143 | { | |
1178743e | 6144 | found_sym = true; |
dae58e04 | 6145 | add_defn_to_vec (result, sym, block); |
2a2d4dc3 AS |
6146 | } |
6147 | } | |
dda83cd7 SM |
6148 | } |
6149 | } | |
76a01679 | 6150 | } |
96d887e8 PH |
6151 | |
6152 | /* NOTE: This really shouldn't be needed for _ada_ symbols. | |
dda83cd7 | 6153 | They aren't parameters, right? */ |
96d887e8 | 6154 | if (!found_sym && arg_sym != NULL) |
dda83cd7 | 6155 | { |
dae58e04 | 6156 | add_defn_to_vec (result, arg_sym, block); |
dda83cd7 | 6157 | } |
96d887e8 PH |
6158 | } |
6159 | } | |
6160 | \f | |
41d27058 | 6161 | |
dda83cd7 | 6162 | /* Symbol Completion */ |
41d27058 | 6163 | |
b5ec771e | 6164 | /* See symtab.h. */ |
41d27058 | 6165 | |
b5ec771e PA |
6166 | bool |
6167 | ada_lookup_name_info::matches | |
6168 | (const char *sym_name, | |
6169 | symbol_name_match_type match_type, | |
a207cff2 | 6170 | completion_match_result *comp_match_res) const |
41d27058 | 6171 | { |
b5ec771e PA |
6172 | bool match = false; |
6173 | const char *text = m_encoded_name.c_str (); | |
6174 | size_t text_len = m_encoded_name.size (); | |
41d27058 JB |
6175 | |
6176 | /* First, test against the fully qualified name of the symbol. */ | |
6177 | ||
6178 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6179 | match = true; |
41d27058 | 6180 | |
f945dedf | 6181 | std::string decoded_name = ada_decode (sym_name); |
b5ec771e | 6182 | if (match && !m_encoded_p) |
41d27058 JB |
6183 | { |
6184 | /* One needed check before declaring a positive match is to verify | |
dda83cd7 SM |
6185 | that iff we are doing a verbatim match, the decoded version |
6186 | of the symbol name starts with '<'. Otherwise, this symbol name | |
6187 | is not a suitable completion. */ | |
41d27058 | 6188 | |
f945dedf | 6189 | bool has_angle_bracket = (decoded_name[0] == '<'); |
b5ec771e | 6190 | match = (has_angle_bracket == m_verbatim_p); |
41d27058 JB |
6191 | } |
6192 | ||
b5ec771e | 6193 | if (match && !m_verbatim_p) |
41d27058 JB |
6194 | { |
6195 | /* When doing non-verbatim match, another check that needs to | |
dda83cd7 SM |
6196 | be done is to verify that the potentially matching symbol name |
6197 | does not include capital letters, because the ada-mode would | |
6198 | not be able to understand these symbol names without the | |
6199 | angle bracket notation. */ | |
41d27058 JB |
6200 | const char *tmp; |
6201 | ||
6202 | for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++); | |
6203 | if (*tmp != '\0') | |
b5ec771e | 6204 | match = false; |
41d27058 JB |
6205 | } |
6206 | ||
6207 | /* Second: Try wild matching... */ | |
6208 | ||
b5ec771e | 6209 | if (!match && m_wild_match_p) |
41d27058 JB |
6210 | { |
6211 | /* Since we are doing wild matching, this means that TEXT | |
dda83cd7 SM |
6212 | may represent an unqualified symbol name. We therefore must |
6213 | also compare TEXT against the unqualified name of the symbol. */ | |
f945dedf | 6214 | sym_name = ada_unqualified_name (decoded_name.c_str ()); |
41d27058 JB |
6215 | |
6216 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6217 | match = true; |
41d27058 JB |
6218 | } |
6219 | ||
b5ec771e | 6220 | /* Finally: If we found a match, prepare the result to return. */ |
41d27058 JB |
6221 | |
6222 | if (!match) | |
b5ec771e | 6223 | return false; |
41d27058 | 6224 | |
a207cff2 | 6225 | if (comp_match_res != NULL) |
b5ec771e | 6226 | { |
a207cff2 | 6227 | std::string &match_str = comp_match_res->match.storage (); |
41d27058 | 6228 | |
b5ec771e | 6229 | if (!m_encoded_p) |
a207cff2 | 6230 | match_str = ada_decode (sym_name); |
b5ec771e PA |
6231 | else |
6232 | { | |
6233 | if (m_verbatim_p) | |
6234 | match_str = add_angle_brackets (sym_name); | |
6235 | else | |
6236 | match_str = sym_name; | |
41d27058 | 6237 | |
b5ec771e | 6238 | } |
a207cff2 PA |
6239 | |
6240 | comp_match_res->set_match (match_str.c_str ()); | |
41d27058 JB |
6241 | } |
6242 | ||
b5ec771e | 6243 | return true; |
41d27058 JB |
6244 | } |
6245 | ||
dda83cd7 | 6246 | /* Field Access */ |
96d887e8 | 6247 | |
73fb9985 JB |
6248 | /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used |
6249 | for tagged types. */ | |
6250 | ||
6251 | static int | |
6252 | ada_is_dispatch_table_ptr_type (struct type *type) | |
6253 | { | |
0d5cff50 | 6254 | const char *name; |
73fb9985 | 6255 | |
78134374 | 6256 | if (type->code () != TYPE_CODE_PTR) |
73fb9985 JB |
6257 | return 0; |
6258 | ||
27710edb | 6259 | name = type->target_type ()->name (); |
73fb9985 JB |
6260 | if (name == NULL) |
6261 | return 0; | |
6262 | ||
6263 | return (strcmp (name, "ada__tags__dispatch_table") == 0); | |
6264 | } | |
6265 | ||
ac4a2da4 JG |
6266 | /* Return non-zero if TYPE is an interface tag. */ |
6267 | ||
6268 | static int | |
6269 | ada_is_interface_tag (struct type *type) | |
6270 | { | |
7d93a1e0 | 6271 | const char *name = type->name (); |
ac4a2da4 JG |
6272 | |
6273 | if (name == NULL) | |
6274 | return 0; | |
6275 | ||
6276 | return (strcmp (name, "ada__tags__interface_tag") == 0); | |
6277 | } | |
6278 | ||
963a6417 PH |
6279 | /* True if field number FIELD_NUM in struct or union type TYPE is supposed |
6280 | to be invisible to users. */ | |
96d887e8 | 6281 | |
963a6417 PH |
6282 | int |
6283 | ada_is_ignored_field (struct type *type, int field_num) | |
96d887e8 | 6284 | { |
1f704f76 | 6285 | if (field_num < 0 || field_num > type->num_fields ()) |
963a6417 | 6286 | return 1; |
ffde82bf | 6287 | |
73fb9985 JB |
6288 | /* Check the name of that field. */ |
6289 | { | |
33d16dd9 | 6290 | const char *name = type->field (field_num).name (); |
73fb9985 JB |
6291 | |
6292 | /* Anonymous field names should not be printed. | |
6293 | brobecker/2007-02-20: I don't think this can actually happen | |
30baf67b | 6294 | but we don't want to print the value of anonymous fields anyway. */ |
73fb9985 JB |
6295 | if (name == NULL) |
6296 | return 1; | |
6297 | ||
ffde82bf JB |
6298 | /* Normally, fields whose name start with an underscore ("_") |
6299 | are fields that have been internally generated by the compiler, | |
6300 | and thus should not be printed. The "_parent" field is special, | |
6301 | however: This is a field internally generated by the compiler | |
6302 | for tagged types, and it contains the components inherited from | |
6303 | the parent type. This field should not be printed as is, but | |
6304 | should not be ignored either. */ | |
61012eef | 6305 | if (name[0] == '_' && !startswith (name, "_parent")) |
73fb9985 | 6306 | return 1; |
d537777d TT |
6307 | |
6308 | /* The compiler doesn't document this, but sometimes it emits | |
6309 | a field whose name starts with a capital letter, like 'V148s'. | |
6310 | These aren't marked as artificial in any way, but we know they | |
6311 | should be ignored. However, wrapper fields should not be | |
6312 | ignored. */ | |
6313 | if (name[0] == 'S' || name[0] == 'R' || name[0] == 'O') | |
6314 | { | |
6315 | /* Wrapper field. */ | |
6316 | } | |
6317 | else if (isupper (name[0])) | |
6318 | return 1; | |
73fb9985 JB |
6319 | } |
6320 | ||
ac4a2da4 JG |
6321 | /* If this is the dispatch table of a tagged type or an interface tag, |
6322 | then ignore. */ | |
73fb9985 | 6323 | if (ada_is_tagged_type (type, 1) |
940da03e SM |
6324 | && (ada_is_dispatch_table_ptr_type (type->field (field_num).type ()) |
6325 | || ada_is_interface_tag (type->field (field_num).type ()))) | |
73fb9985 JB |
6326 | return 1; |
6327 | ||
6328 | /* Not a special field, so it should not be ignored. */ | |
6329 | return 0; | |
963a6417 | 6330 | } |
96d887e8 | 6331 | |
963a6417 | 6332 | /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a |
0963b4bd | 6333 | pointer or reference type whose ultimate target has a tag field. */ |
96d887e8 | 6334 | |
963a6417 PH |
6335 | int |
6336 | ada_is_tagged_type (struct type *type, int refok) | |
6337 | { | |
988f6b3d | 6338 | return (ada_lookup_struct_elt_type (type, "_tag", refok, 1) != NULL); |
963a6417 | 6339 | } |
96d887e8 | 6340 | |
963a6417 | 6341 | /* True iff TYPE represents the type of X'Tag */ |
96d887e8 | 6342 | |
963a6417 PH |
6343 | int |
6344 | ada_is_tag_type (struct type *type) | |
6345 | { | |
460efde1 JB |
6346 | type = ada_check_typedef (type); |
6347 | ||
78134374 | 6348 | if (type == NULL || type->code () != TYPE_CODE_PTR) |
963a6417 PH |
6349 | return 0; |
6350 | else | |
96d887e8 | 6351 | { |
27710edb | 6352 | const char *name = ada_type_name (type->target_type ()); |
5b4ee69b | 6353 | |
963a6417 | 6354 | return (name != NULL |
dda83cd7 | 6355 | && strcmp (name, "ada__tags__dispatch_table") == 0); |
96d887e8 | 6356 | } |
96d887e8 PH |
6357 | } |
6358 | ||
963a6417 | 6359 | /* The type of the tag on VAL. */ |
76a01679 | 6360 | |
de93309a | 6361 | static struct type * |
963a6417 | 6362 | ada_tag_type (struct value *val) |
96d887e8 | 6363 | { |
d0c97917 | 6364 | return ada_lookup_struct_elt_type (val->type (), "_tag", 1, 0); |
963a6417 | 6365 | } |
96d887e8 | 6366 | |
b50d69b5 JG |
6367 | /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95, |
6368 | retired at Ada 05). */ | |
6369 | ||
6370 | static int | |
6371 | is_ada95_tag (struct value *tag) | |
6372 | { | |
6373 | return ada_value_struct_elt (tag, "tsd", 1) != NULL; | |
6374 | } | |
6375 | ||
963a6417 | 6376 | /* The value of the tag on VAL. */ |
96d887e8 | 6377 | |
de93309a | 6378 | static struct value * |
963a6417 PH |
6379 | ada_value_tag (struct value *val) |
6380 | { | |
03ee6b2e | 6381 | return ada_value_struct_elt (val, "_tag", 0); |
96d887e8 PH |
6382 | } |
6383 | ||
963a6417 PH |
6384 | /* The value of the tag on the object of type TYPE whose contents are |
6385 | saved at VALADDR, if it is non-null, or is at memory address | |
0963b4bd | 6386 | ADDRESS. */ |
96d887e8 | 6387 | |
963a6417 | 6388 | static struct value * |
10a2c479 | 6389 | value_tag_from_contents_and_address (struct type *type, |
fc1a4b47 | 6390 | const gdb_byte *valaddr, |
dda83cd7 | 6391 | CORE_ADDR address) |
96d887e8 | 6392 | { |
b5385fc0 | 6393 | int tag_byte_offset; |
963a6417 | 6394 | struct type *tag_type; |
5b4ee69b | 6395 | |
4d1795ac TT |
6396 | gdb::array_view<const gdb_byte> contents; |
6397 | if (valaddr != nullptr) | |
df86565b | 6398 | contents = gdb::make_array_view (valaddr, type->length ()); |
4d1795ac TT |
6399 | struct type *resolved_type = resolve_dynamic_type (type, contents, address); |
6400 | if (find_struct_field ("_tag", resolved_type, 0, &tag_type, &tag_byte_offset, | |
dda83cd7 | 6401 | NULL, NULL, NULL)) |
96d887e8 | 6402 | { |
fc1a4b47 | 6403 | const gdb_byte *valaddr1 = ((valaddr == NULL) |
10a2c479 AC |
6404 | ? NULL |
6405 | : valaddr + tag_byte_offset); | |
963a6417 | 6406 | CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset; |
96d887e8 | 6407 | |
963a6417 | 6408 | return value_from_contents_and_address (tag_type, valaddr1, address1); |
96d887e8 | 6409 | } |
963a6417 PH |
6410 | return NULL; |
6411 | } | |
96d887e8 | 6412 | |
963a6417 PH |
6413 | static struct type * |
6414 | type_from_tag (struct value *tag) | |
6415 | { | |
f5272a3b | 6416 | gdb::unique_xmalloc_ptr<char> type_name = ada_tag_name (tag); |
5b4ee69b | 6417 | |
963a6417 | 6418 | if (type_name != NULL) |
5c4258f4 | 6419 | return ada_find_any_type (ada_encode (type_name.get ()).c_str ()); |
963a6417 PH |
6420 | return NULL; |
6421 | } | |
96d887e8 | 6422 | |
b50d69b5 JG |
6423 | /* Given a value OBJ of a tagged type, return a value of this |
6424 | type at the base address of the object. The base address, as | |
6425 | defined in Ada.Tags, it is the address of the primary tag of | |
6426 | the object, and therefore where the field values of its full | |
6427 | view can be fetched. */ | |
6428 | ||
6429 | struct value * | |
6430 | ada_tag_value_at_base_address (struct value *obj) | |
6431 | { | |
b50d69b5 JG |
6432 | struct value *val; |
6433 | LONGEST offset_to_top = 0; | |
6434 | struct type *ptr_type, *obj_type; | |
6435 | struct value *tag; | |
6436 | CORE_ADDR base_address; | |
6437 | ||
d0c97917 | 6438 | obj_type = obj->type (); |
b50d69b5 JG |
6439 | |
6440 | /* It is the responsability of the caller to deref pointers. */ | |
6441 | ||
78134374 | 6442 | if (obj_type->code () == TYPE_CODE_PTR || obj_type->code () == TYPE_CODE_REF) |
b50d69b5 JG |
6443 | return obj; |
6444 | ||
6445 | tag = ada_value_tag (obj); | |
6446 | if (!tag) | |
6447 | return obj; | |
6448 | ||
6449 | /* Base addresses only appeared with Ada 05 and multiple inheritance. */ | |
6450 | ||
6451 | if (is_ada95_tag (tag)) | |
6452 | return obj; | |
6453 | ||
d537777d TT |
6454 | struct type *offset_type |
6455 | = language_lookup_primitive_type (language_def (language_ada), | |
6456 | target_gdbarch(), "storage_offset"); | |
6457 | ptr_type = lookup_pointer_type (offset_type); | |
b50d69b5 JG |
6458 | val = value_cast (ptr_type, tag); |
6459 | if (!val) | |
6460 | return obj; | |
6461 | ||
6462 | /* It is perfectly possible that an exception be raised while | |
6463 | trying to determine the base address, just like for the tag; | |
6464 | see ada_tag_name for more details. We do not print the error | |
6465 | message for the same reason. */ | |
6466 | ||
a70b8144 | 6467 | try |
b50d69b5 JG |
6468 | { |
6469 | offset_to_top = value_as_long (value_ind (value_ptradd (val, -2))); | |
6470 | } | |
6471 | ||
230d2906 | 6472 | catch (const gdb_exception_error &e) |
492d29ea PA |
6473 | { |
6474 | return obj; | |
6475 | } | |
b50d69b5 JG |
6476 | |
6477 | /* If offset is null, nothing to do. */ | |
6478 | ||
6479 | if (offset_to_top == 0) | |
6480 | return obj; | |
6481 | ||
6482 | /* -1 is a special case in Ada.Tags; however, what should be done | |
6483 | is not quite clear from the documentation. So do nothing for | |
6484 | now. */ | |
6485 | ||
6486 | if (offset_to_top == -1) | |
6487 | return obj; | |
6488 | ||
d537777d TT |
6489 | /* Storage_Offset'Last is used to indicate that a dynamic offset to |
6490 | top is used. In this situation the offset is stored just after | |
6491 | the tag, in the object itself. */ | |
df86565b | 6492 | ULONGEST last = (((ULONGEST) 1) << (8 * offset_type->length () - 1)) - 1; |
d537777d TT |
6493 | if (offset_to_top == last) |
6494 | { | |
6495 | struct value *tem = value_addr (tag); | |
6496 | tem = value_ptradd (tem, 1); | |
6497 | tem = value_cast (ptr_type, tem); | |
6498 | offset_to_top = value_as_long (value_ind (tem)); | |
6499 | } | |
05527d8c TV |
6500 | |
6501 | if (offset_to_top > 0) | |
d537777d TT |
6502 | { |
6503 | /* OFFSET_TO_TOP used to be a positive value to be subtracted | |
6504 | from the base address. This was however incompatible with | |
6505 | C++ dispatch table: C++ uses a *negative* value to *add* | |
6506 | to the base address. Ada's convention has therefore been | |
6507 | changed in GNAT 19.0w 20171023: since then, C++ and Ada | |
6508 | use the same convention. Here, we support both cases by | |
6509 | checking the sign of OFFSET_TO_TOP. */ | |
6510 | offset_to_top = -offset_to_top; | |
6511 | } | |
08f49010 | 6512 | |
9feb2d07 | 6513 | base_address = obj->address () + offset_to_top; |
b50d69b5 JG |
6514 | tag = value_tag_from_contents_and_address (obj_type, NULL, base_address); |
6515 | ||
6516 | /* Make sure that we have a proper tag at the new address. | |
6517 | Otherwise, offset_to_top is bogus (which can happen when | |
6518 | the object is not initialized yet). */ | |
6519 | ||
6520 | if (!tag) | |
6521 | return obj; | |
6522 | ||
6523 | obj_type = type_from_tag (tag); | |
6524 | ||
6525 | if (!obj_type) | |
6526 | return obj; | |
6527 | ||
6528 | return value_from_contents_and_address (obj_type, NULL, base_address); | |
6529 | } | |
6530 | ||
1b611343 JB |
6531 | /* Return the "ada__tags__type_specific_data" type. */ |
6532 | ||
6533 | static struct type * | |
6534 | ada_get_tsd_type (struct inferior *inf) | |
963a6417 | 6535 | { |
1b611343 | 6536 | struct ada_inferior_data *data = get_ada_inferior_data (inf); |
4c4b4cd2 | 6537 | |
1b611343 JB |
6538 | if (data->tsd_type == 0) |
6539 | data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data"); | |
6540 | return data->tsd_type; | |
6541 | } | |
529cad9c | 6542 | |
1b611343 JB |
6543 | /* Return the TSD (type-specific data) associated to the given TAG. |
6544 | TAG is assumed to be the tag of a tagged-type entity. | |
529cad9c | 6545 | |
1b611343 | 6546 | May return NULL if we are unable to get the TSD. */ |
4c4b4cd2 | 6547 | |
1b611343 JB |
6548 | static struct value * |
6549 | ada_get_tsd_from_tag (struct value *tag) | |
4c4b4cd2 | 6550 | { |
4c4b4cd2 | 6551 | struct value *val; |
1b611343 | 6552 | struct type *type; |
5b4ee69b | 6553 | |
1b611343 JB |
6554 | /* First option: The TSD is simply stored as a field of our TAG. |
6555 | Only older versions of GNAT would use this format, but we have | |
6556 | to test it first, because there are no visible markers for | |
6557 | the current approach except the absence of that field. */ | |
529cad9c | 6558 | |
1b611343 JB |
6559 | val = ada_value_struct_elt (tag, "tsd", 1); |
6560 | if (val) | |
6561 | return val; | |
e802dbe0 | 6562 | |
1b611343 JB |
6563 | /* Try the second representation for the dispatch table (in which |
6564 | there is no explicit 'tsd' field in the referent of the tag pointer, | |
6565 | and instead the tsd pointer is stored just before the dispatch | |
6566 | table. */ | |
e802dbe0 | 6567 | |
1b611343 JB |
6568 | type = ada_get_tsd_type (current_inferior()); |
6569 | if (type == NULL) | |
6570 | return NULL; | |
6571 | type = lookup_pointer_type (lookup_pointer_type (type)); | |
6572 | val = value_cast (type, tag); | |
6573 | if (val == NULL) | |
6574 | return NULL; | |
6575 | return value_ind (value_ptradd (val, -1)); | |
e802dbe0 JB |
6576 | } |
6577 | ||
1b611343 JB |
6578 | /* Given the TSD of a tag (type-specific data), return a string |
6579 | containing the name of the associated type. | |
6580 | ||
f5272a3b | 6581 | May return NULL if we are unable to determine the tag name. */ |
1b611343 | 6582 | |
f5272a3b | 6583 | static gdb::unique_xmalloc_ptr<char> |
1b611343 | 6584 | ada_tag_name_from_tsd (struct value *tsd) |
529cad9c | 6585 | { |
1b611343 | 6586 | struct value *val; |
529cad9c | 6587 | |
1b611343 | 6588 | val = ada_value_struct_elt (tsd, "expanded_name", 1); |
4c4b4cd2 | 6589 | if (val == NULL) |
1b611343 | 6590 | return NULL; |
66920317 TT |
6591 | gdb::unique_xmalloc_ptr<char> buffer |
6592 | = target_read_string (value_as_address (val), INT_MAX); | |
6593 | if (buffer == nullptr) | |
f5272a3b TT |
6594 | return nullptr; |
6595 | ||
315e4ebb | 6596 | try |
f5272a3b | 6597 | { |
315e4ebb TT |
6598 | /* Let this throw an exception on error. If the data is |
6599 | uninitialized, we'd rather not have the user see a | |
6600 | warning. */ | |
6601 | const char *folded = ada_fold_name (buffer.get (), true); | |
6602 | return make_unique_xstrdup (folded); | |
6603 | } | |
6604 | catch (const gdb_exception &) | |
6605 | { | |
6606 | return nullptr; | |
f5272a3b | 6607 | } |
4c4b4cd2 PH |
6608 | } |
6609 | ||
6610 | /* The type name of the dynamic type denoted by the 'tag value TAG, as | |
1b611343 JB |
6611 | a C string. |
6612 | ||
6613 | Return NULL if the TAG is not an Ada tag, or if we were unable to | |
f5272a3b | 6614 | determine the name of that tag. */ |
4c4b4cd2 | 6615 | |
f5272a3b | 6616 | gdb::unique_xmalloc_ptr<char> |
4c4b4cd2 PH |
6617 | ada_tag_name (struct value *tag) |
6618 | { | |
f5272a3b | 6619 | gdb::unique_xmalloc_ptr<char> name; |
5b4ee69b | 6620 | |
d0c97917 | 6621 | if (!ada_is_tag_type (tag->type ())) |
4c4b4cd2 | 6622 | return NULL; |
1b611343 JB |
6623 | |
6624 | /* It is perfectly possible that an exception be raised while trying | |
6625 | to determine the TAG's name, even under normal circumstances: | |
6626 | The associated variable may be uninitialized or corrupted, for | |
6627 | instance. We do not let any exception propagate past this point. | |
6628 | instead we return NULL. | |
6629 | ||
6630 | We also do not print the error message either (which often is very | |
6631 | low-level (Eg: "Cannot read memory at 0x[...]"), but instead let | |
6632 | the caller print a more meaningful message if necessary. */ | |
a70b8144 | 6633 | try |
1b611343 JB |
6634 | { |
6635 | struct value *tsd = ada_get_tsd_from_tag (tag); | |
6636 | ||
6637 | if (tsd != NULL) | |
6638 | name = ada_tag_name_from_tsd (tsd); | |
6639 | } | |
230d2906 | 6640 | catch (const gdb_exception_error &e) |
492d29ea PA |
6641 | { |
6642 | } | |
1b611343 JB |
6643 | |
6644 | return name; | |
4c4b4cd2 PH |
6645 | } |
6646 | ||
6647 | /* The parent type of TYPE, or NULL if none. */ | |
14f9c5c9 | 6648 | |
d2e4a39e | 6649 | struct type * |
ebf56fd3 | 6650 | ada_parent_type (struct type *type) |
14f9c5c9 AS |
6651 | { |
6652 | int i; | |
6653 | ||
61ee279c | 6654 | type = ada_check_typedef (type); |
14f9c5c9 | 6655 | |
78134374 | 6656 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
6657 | return NULL; |
6658 | ||
1f704f76 | 6659 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 6660 | if (ada_is_parent_field (type, i)) |
0c1f74cf | 6661 | { |
dda83cd7 | 6662 | struct type *parent_type = type->field (i).type (); |
0c1f74cf | 6663 | |
dda83cd7 SM |
6664 | /* If the _parent field is a pointer, then dereference it. */ |
6665 | if (parent_type->code () == TYPE_CODE_PTR) | |
27710edb | 6666 | parent_type = parent_type->target_type (); |
dda83cd7 SM |
6667 | /* If there is a parallel XVS type, get the actual base type. */ |
6668 | parent_type = ada_get_base_type (parent_type); | |
0c1f74cf | 6669 | |
dda83cd7 | 6670 | return ada_check_typedef (parent_type); |
0c1f74cf | 6671 | } |
14f9c5c9 AS |
6672 | |
6673 | return NULL; | |
6674 | } | |
6675 | ||
4c4b4cd2 PH |
6676 | /* True iff field number FIELD_NUM of structure type TYPE contains the |
6677 | parent-type (inherited) fields of a derived type. Assumes TYPE is | |
6678 | a structure type with at least FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6679 | |
6680 | int | |
ebf56fd3 | 6681 | ada_is_parent_field (struct type *type, int field_num) |
14f9c5c9 | 6682 | { |
33d16dd9 | 6683 | const char *name = ada_check_typedef (type)->field (field_num).name (); |
5b4ee69b | 6684 | |
4c4b4cd2 | 6685 | return (name != NULL |
dda83cd7 SM |
6686 | && (startswith (name, "PARENT") |
6687 | || startswith (name, "_parent"))); | |
14f9c5c9 AS |
6688 | } |
6689 | ||
4c4b4cd2 | 6690 | /* True iff field number FIELD_NUM of structure type TYPE is a |
14f9c5c9 | 6691 | transparent wrapper field (which should be silently traversed when doing |
4c4b4cd2 | 6692 | field selection and flattened when printing). Assumes TYPE is a |
14f9c5c9 | 6693 | structure type with at least FIELD_NUM+1 fields. Such fields are always |
4c4b4cd2 | 6694 | structures. */ |
14f9c5c9 AS |
6695 | |
6696 | int | |
ebf56fd3 | 6697 | ada_is_wrapper_field (struct type *type, int field_num) |
14f9c5c9 | 6698 | { |
33d16dd9 | 6699 | const char *name = type->field (field_num).name (); |
5b4ee69b | 6700 | |
dddc0e16 JB |
6701 | if (name != NULL && strcmp (name, "RETVAL") == 0) |
6702 | { | |
6703 | /* This happens in functions with "out" or "in out" parameters | |
6704 | which are passed by copy. For such functions, GNAT describes | |
6705 | the function's return type as being a struct where the return | |
6706 | value is in a field called RETVAL, and where the other "out" | |
6707 | or "in out" parameters are fields of that struct. This is not | |
6708 | a wrapper. */ | |
6709 | return 0; | |
6710 | } | |
6711 | ||
d2e4a39e | 6712 | return (name != NULL |
dda83cd7 SM |
6713 | && (startswith (name, "PARENT") |
6714 | || strcmp (name, "REP") == 0 | |
6715 | || startswith (name, "_parent") | |
6716 | || name[0] == 'S' || name[0] == 'R' || name[0] == 'O')); | |
14f9c5c9 AS |
6717 | } |
6718 | ||
4c4b4cd2 PH |
6719 | /* True iff field number FIELD_NUM of structure or union type TYPE |
6720 | is a variant wrapper. Assumes TYPE is a structure type with at least | |
6721 | FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6722 | |
6723 | int | |
ebf56fd3 | 6724 | ada_is_variant_part (struct type *type, int field_num) |
14f9c5c9 | 6725 | { |
8ecb59f8 TT |
6726 | /* Only Ada types are eligible. */ |
6727 | if (!ADA_TYPE_P (type)) | |
6728 | return 0; | |
6729 | ||
940da03e | 6730 | struct type *field_type = type->field (field_num).type (); |
5b4ee69b | 6731 | |
78134374 SM |
6732 | return (field_type->code () == TYPE_CODE_UNION |
6733 | || (is_dynamic_field (type, field_num) | |
27710edb | 6734 | && (field_type->target_type ()->code () |
c3e5cd34 | 6735 | == TYPE_CODE_UNION))); |
14f9c5c9 AS |
6736 | } |
6737 | ||
6738 | /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part) | |
4c4b4cd2 | 6739 | whose discriminants are contained in the record type OUTER_TYPE, |
7c964f07 UW |
6740 | returns the type of the controlling discriminant for the variant. |
6741 | May return NULL if the type could not be found. */ | |
14f9c5c9 | 6742 | |
d2e4a39e | 6743 | struct type * |
ebf56fd3 | 6744 | ada_variant_discrim_type (struct type *var_type, struct type *outer_type) |
14f9c5c9 | 6745 | { |
a121b7c1 | 6746 | const char *name = ada_variant_discrim_name (var_type); |
5b4ee69b | 6747 | |
988f6b3d | 6748 | return ada_lookup_struct_elt_type (outer_type, name, 1, 1); |
14f9c5c9 AS |
6749 | } |
6750 | ||
4c4b4cd2 | 6751 | /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a |
14f9c5c9 | 6752 | valid field number within it, returns 1 iff field FIELD_NUM of TYPE |
4c4b4cd2 | 6753 | represents a 'when others' clause; otherwise 0. */ |
14f9c5c9 | 6754 | |
de93309a | 6755 | static int |
ebf56fd3 | 6756 | ada_is_others_clause (struct type *type, int field_num) |
14f9c5c9 | 6757 | { |
33d16dd9 | 6758 | const char *name = type->field (field_num).name (); |
5b4ee69b | 6759 | |
14f9c5c9 AS |
6760 | return (name != NULL && name[0] == 'O'); |
6761 | } | |
6762 | ||
6763 | /* Assuming that TYPE0 is the type of the variant part of a record, | |
4c4b4cd2 PH |
6764 | returns the name of the discriminant controlling the variant. |
6765 | The value is valid until the next call to ada_variant_discrim_name. */ | |
14f9c5c9 | 6766 | |
a121b7c1 | 6767 | const char * |
ebf56fd3 | 6768 | ada_variant_discrim_name (struct type *type0) |
14f9c5c9 | 6769 | { |
5f9febe0 | 6770 | static std::string result; |
d2e4a39e AS |
6771 | struct type *type; |
6772 | const char *name; | |
6773 | const char *discrim_end; | |
6774 | const char *discrim_start; | |
14f9c5c9 | 6775 | |
78134374 | 6776 | if (type0->code () == TYPE_CODE_PTR) |
27710edb | 6777 | type = type0->target_type (); |
14f9c5c9 AS |
6778 | else |
6779 | type = type0; | |
6780 | ||
6781 | name = ada_type_name (type); | |
6782 | ||
6783 | if (name == NULL || name[0] == '\000') | |
6784 | return ""; | |
6785 | ||
6786 | for (discrim_end = name + strlen (name) - 6; discrim_end != name; | |
6787 | discrim_end -= 1) | |
6788 | { | |
61012eef | 6789 | if (startswith (discrim_end, "___XVN")) |
dda83cd7 | 6790 | break; |
14f9c5c9 AS |
6791 | } |
6792 | if (discrim_end == name) | |
6793 | return ""; | |
6794 | ||
d2e4a39e | 6795 | for (discrim_start = discrim_end; discrim_start != name + 3; |
14f9c5c9 AS |
6796 | discrim_start -= 1) |
6797 | { | |
d2e4a39e | 6798 | if (discrim_start == name + 1) |
dda83cd7 | 6799 | return ""; |
76a01679 | 6800 | if ((discrim_start > name + 3 |
dda83cd7 SM |
6801 | && startswith (discrim_start - 3, "___")) |
6802 | || discrim_start[-1] == '.') | |
6803 | break; | |
14f9c5c9 AS |
6804 | } |
6805 | ||
5f9febe0 TT |
6806 | result = std::string (discrim_start, discrim_end - discrim_start); |
6807 | return result.c_str (); | |
14f9c5c9 AS |
6808 | } |
6809 | ||
4c4b4cd2 PH |
6810 | /* Scan STR for a subtype-encoded number, beginning at position K. |
6811 | Put the position of the character just past the number scanned in | |
6812 | *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL. | |
6813 | Return 1 if there was a valid number at the given position, and 0 | |
6814 | otherwise. A "subtype-encoded" number consists of the absolute value | |
6815 | in decimal, followed by the letter 'm' to indicate a negative number. | |
6816 | Assumes 0m does not occur. */ | |
14f9c5c9 AS |
6817 | |
6818 | int | |
d2e4a39e | 6819 | ada_scan_number (const char str[], int k, LONGEST * R, int *new_k) |
14f9c5c9 AS |
6820 | { |
6821 | ULONGEST RU; | |
6822 | ||
d2e4a39e | 6823 | if (!isdigit (str[k])) |
14f9c5c9 AS |
6824 | return 0; |
6825 | ||
4c4b4cd2 | 6826 | /* Do it the hard way so as not to make any assumption about |
14f9c5c9 | 6827 | the relationship of unsigned long (%lu scan format code) and |
4c4b4cd2 | 6828 | LONGEST. */ |
14f9c5c9 AS |
6829 | RU = 0; |
6830 | while (isdigit (str[k])) | |
6831 | { | |
d2e4a39e | 6832 | RU = RU * 10 + (str[k] - '0'); |
14f9c5c9 AS |
6833 | k += 1; |
6834 | } | |
6835 | ||
d2e4a39e | 6836 | if (str[k] == 'm') |
14f9c5c9 AS |
6837 | { |
6838 | if (R != NULL) | |
dda83cd7 | 6839 | *R = (-(LONGEST) (RU - 1)) - 1; |
14f9c5c9 AS |
6840 | k += 1; |
6841 | } | |
6842 | else if (R != NULL) | |
6843 | *R = (LONGEST) RU; | |
6844 | ||
4c4b4cd2 | 6845 | /* NOTE on the above: Technically, C does not say what the results of |
14f9c5c9 AS |
6846 | - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive |
6847 | number representable as a LONGEST (although either would probably work | |
6848 | in most implementations). When RU>0, the locution in the then branch | |
4c4b4cd2 | 6849 | above is always equivalent to the negative of RU. */ |
14f9c5c9 AS |
6850 | |
6851 | if (new_k != NULL) | |
6852 | *new_k = k; | |
6853 | return 1; | |
6854 | } | |
6855 | ||
4c4b4cd2 PH |
6856 | /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field), |
6857 | and FIELD_NUM is a valid field number within it, returns 1 iff VAL is | |
6858 | in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */ | |
14f9c5c9 | 6859 | |
de93309a | 6860 | static int |
ebf56fd3 | 6861 | ada_in_variant (LONGEST val, struct type *type, int field_num) |
14f9c5c9 | 6862 | { |
33d16dd9 | 6863 | const char *name = type->field (field_num).name (); |
14f9c5c9 AS |
6864 | int p; |
6865 | ||
6866 | p = 0; | |
6867 | while (1) | |
6868 | { | |
d2e4a39e | 6869 | switch (name[p]) |
dda83cd7 SM |
6870 | { |
6871 | case '\0': | |
6872 | return 0; | |
6873 | case 'S': | |
6874 | { | |
6875 | LONGEST W; | |
6876 | ||
6877 | if (!ada_scan_number (name, p + 1, &W, &p)) | |
6878 | return 0; | |
6879 | if (val == W) | |
6880 | return 1; | |
6881 | break; | |
6882 | } | |
6883 | case 'R': | |
6884 | { | |
6885 | LONGEST L, U; | |
6886 | ||
6887 | if (!ada_scan_number (name, p + 1, &L, &p) | |
6888 | || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p)) | |
6889 | return 0; | |
6890 | if (val >= L && val <= U) | |
6891 | return 1; | |
6892 | break; | |
6893 | } | |
6894 | case 'O': | |
6895 | return 1; | |
6896 | default: | |
6897 | return 0; | |
6898 | } | |
4c4b4cd2 PH |
6899 | } |
6900 | } | |
6901 | ||
0963b4bd | 6902 | /* FIXME: Lots of redundancy below. Try to consolidate. */ |
4c4b4cd2 PH |
6903 | |
6904 | /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type | |
6905 | ARG_TYPE, extract and return the value of one of its (non-static) | |
6906 | fields. FIELDNO says which field. Differs from value_primitive_field | |
6907 | only in that it can handle packed values of arbitrary type. */ | |
14f9c5c9 | 6908 | |
5eb68a39 | 6909 | struct value * |
d2e4a39e | 6910 | ada_value_primitive_field (struct value *arg1, int offset, int fieldno, |
dda83cd7 | 6911 | struct type *arg_type) |
14f9c5c9 | 6912 | { |
14f9c5c9 AS |
6913 | struct type *type; |
6914 | ||
61ee279c | 6915 | arg_type = ada_check_typedef (arg_type); |
940da03e | 6916 | type = arg_type->field (fieldno).type (); |
14f9c5c9 | 6917 | |
4504bbde TT |
6918 | /* Handle packed fields. It might be that the field is not packed |
6919 | relative to its containing structure, but the structure itself is | |
6920 | packed; in this case we must take the bit-field path. */ | |
5011c493 | 6921 | if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0 || arg1->bitpos () != 0) |
14f9c5c9 | 6922 | { |
b610c045 | 6923 | int bit_pos = arg_type->field (fieldno).loc_bitpos (); |
14f9c5c9 | 6924 | int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno); |
d2e4a39e | 6925 | |
50888e42 SM |
6926 | return ada_value_primitive_packed_val (arg1, |
6927 | value_contents (arg1).data (), | |
dda83cd7 SM |
6928 | offset + bit_pos / 8, |
6929 | bit_pos % 8, bit_size, type); | |
14f9c5c9 AS |
6930 | } |
6931 | else | |
6932 | return value_primitive_field (arg1, offset, fieldno, arg_type); | |
6933 | } | |
6934 | ||
52ce6436 PH |
6935 | /* Find field with name NAME in object of type TYPE. If found, |
6936 | set the following for each argument that is non-null: | |
6937 | - *FIELD_TYPE_P to the field's type; | |
6938 | - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within | |
6939 | an object of that type; | |
6940 | - *BIT_OFFSET_P to the bit offset modulo byte size of the field; | |
6941 | - *BIT_SIZE_P to its size in bits if the field is packed, and | |
6942 | 0 otherwise; | |
6943 | If INDEX_P is non-null, increment *INDEX_P by the number of source-visible | |
6944 | fields up to but not including the desired field, or by the total | |
6945 | number of fields if not found. A NULL value of NAME never | |
6946 | matches; the function just counts visible fields in this case. | |
6947 | ||
828d5846 XR |
6948 | Notice that we need to handle when a tagged record hierarchy |
6949 | has some components with the same name, like in this scenario: | |
6950 | ||
6951 | type Top_T is tagged record | |
dda83cd7 SM |
6952 | N : Integer := 1; |
6953 | U : Integer := 974; | |
6954 | A : Integer := 48; | |
828d5846 XR |
6955 | end record; |
6956 | ||
6957 | type Middle_T is new Top.Top_T with record | |
dda83cd7 SM |
6958 | N : Character := 'a'; |
6959 | C : Integer := 3; | |
828d5846 XR |
6960 | end record; |
6961 | ||
6962 | type Bottom_T is new Middle.Middle_T with record | |
dda83cd7 SM |
6963 | N : Float := 4.0; |
6964 | C : Character := '5'; | |
6965 | X : Integer := 6; | |
6966 | A : Character := 'J'; | |
828d5846 XR |
6967 | end record; |
6968 | ||
6969 | Let's say we now have a variable declared and initialized as follow: | |
6970 | ||
6971 | TC : Top_A := new Bottom_T; | |
6972 | ||
6973 | And then we use this variable to call this function | |
6974 | ||
6975 | procedure Assign (Obj: in out Top_T; TV : Integer); | |
6976 | ||
6977 | as follow: | |
6978 | ||
6979 | Assign (Top_T (B), 12); | |
6980 | ||
6981 | Now, we're in the debugger, and we're inside that procedure | |
6982 | then and we want to print the value of obj.c: | |
6983 | ||
6984 | Usually, the tagged record or one of the parent type owns the | |
6985 | component to print and there's no issue but in this particular | |
6986 | case, what does it mean to ask for Obj.C? Since the actual | |
6987 | type for object is type Bottom_T, it could mean two things: type | |
6988 | component C from the Middle_T view, but also component C from | |
6989 | Bottom_T. So in that "undefined" case, when the component is | |
6990 | not found in the non-resolved type (which includes all the | |
6991 | components of the parent type), then resolve it and see if we | |
6992 | get better luck once expanded. | |
6993 | ||
6994 | In the case of homonyms in the derived tagged type, we don't | |
6995 | guaranty anything, and pick the one that's easiest for us | |
6996 | to program. | |
6997 | ||
0963b4bd | 6998 | Returns 1 if found, 0 otherwise. */ |
52ce6436 | 6999 | |
4c4b4cd2 | 7000 | static int |
0d5cff50 | 7001 | find_struct_field (const char *name, struct type *type, int offset, |
dda83cd7 SM |
7002 | struct type **field_type_p, |
7003 | int *byte_offset_p, int *bit_offset_p, int *bit_size_p, | |
52ce6436 | 7004 | int *index_p) |
4c4b4cd2 PH |
7005 | { |
7006 | int i; | |
828d5846 | 7007 | int parent_offset = -1; |
4c4b4cd2 | 7008 | |
61ee279c | 7009 | type = ada_check_typedef (type); |
76a01679 | 7010 | |
52ce6436 PH |
7011 | if (field_type_p != NULL) |
7012 | *field_type_p = NULL; | |
7013 | if (byte_offset_p != NULL) | |
d5d6fca5 | 7014 | *byte_offset_p = 0; |
52ce6436 PH |
7015 | if (bit_offset_p != NULL) |
7016 | *bit_offset_p = 0; | |
7017 | if (bit_size_p != NULL) | |
7018 | *bit_size_p = 0; | |
7019 | ||
1f704f76 | 7020 | for (i = 0; i < type->num_fields (); i += 1) |
4c4b4cd2 | 7021 | { |
4d1795ac TT |
7022 | /* These can't be computed using TYPE_FIELD_BITPOS for a dynamic |
7023 | type. However, we only need the values to be correct when | |
7024 | the caller asks for them. */ | |
7025 | int bit_pos = 0, fld_offset = 0; | |
7026 | if (byte_offset_p != nullptr || bit_offset_p != nullptr) | |
7027 | { | |
b610c045 | 7028 | bit_pos = type->field (i).loc_bitpos (); |
4d1795ac TT |
7029 | fld_offset = offset + bit_pos / 8; |
7030 | } | |
7031 | ||
33d16dd9 | 7032 | const char *t_field_name = type->field (i).name (); |
76a01679 | 7033 | |
4c4b4cd2 | 7034 | if (t_field_name == NULL) |
dda83cd7 | 7035 | continue; |
4c4b4cd2 | 7036 | |
828d5846 | 7037 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7038 | { |
828d5846 XR |
7039 | /* This is a field pointing us to the parent type of a tagged |
7040 | type. As hinted in this function's documentation, we give | |
7041 | preference to fields in the current record first, so what | |
7042 | we do here is just record the index of this field before | |
7043 | we skip it. If it turns out we couldn't find our field | |
7044 | in the current record, then we'll get back to it and search | |
7045 | inside it whether the field might exist in the parent. */ | |
7046 | ||
dda83cd7 SM |
7047 | parent_offset = i; |
7048 | continue; | |
7049 | } | |
828d5846 | 7050 | |
52ce6436 | 7051 | else if (name != NULL && field_name_match (t_field_name, name)) |
dda83cd7 SM |
7052 | { |
7053 | int bit_size = TYPE_FIELD_BITSIZE (type, i); | |
5b4ee69b | 7054 | |
52ce6436 | 7055 | if (field_type_p != NULL) |
940da03e | 7056 | *field_type_p = type->field (i).type (); |
52ce6436 PH |
7057 | if (byte_offset_p != NULL) |
7058 | *byte_offset_p = fld_offset; | |
7059 | if (bit_offset_p != NULL) | |
7060 | *bit_offset_p = bit_pos % 8; | |
7061 | if (bit_size_p != NULL) | |
7062 | *bit_size_p = bit_size; | |
dda83cd7 SM |
7063 | return 1; |
7064 | } | |
4c4b4cd2 | 7065 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 | 7066 | { |
940da03e | 7067 | if (find_struct_field (name, type->field (i).type (), fld_offset, |
52ce6436 PH |
7068 | field_type_p, byte_offset_p, bit_offset_p, |
7069 | bit_size_p, index_p)) | |
dda83cd7 SM |
7070 | return 1; |
7071 | } | |
4c4b4cd2 | 7072 | else if (ada_is_variant_part (type, i)) |
dda83cd7 | 7073 | { |
52ce6436 PH |
7074 | /* PNH: Wait. Do we ever execute this section, or is ARG always of |
7075 | fixed type?? */ | |
dda83cd7 SM |
7076 | int j; |
7077 | struct type *field_type | |
940da03e | 7078 | = ada_check_typedef (type->field (i).type ()); |
4c4b4cd2 | 7079 | |
dda83cd7 SM |
7080 | for (j = 0; j < field_type->num_fields (); j += 1) |
7081 | { | |
7082 | if (find_struct_field (name, field_type->field (j).type (), | |
7083 | fld_offset | |
b610c045 | 7084 | + field_type->field (j).loc_bitpos () / 8, |
dda83cd7 SM |
7085 | field_type_p, byte_offset_p, |
7086 | bit_offset_p, bit_size_p, index_p)) | |
7087 | return 1; | |
7088 | } | |
7089 | } | |
52ce6436 PH |
7090 | else if (index_p != NULL) |
7091 | *index_p += 1; | |
4c4b4cd2 | 7092 | } |
828d5846 XR |
7093 | |
7094 | /* Field not found so far. If this is a tagged type which | |
7095 | has a parent, try finding that field in the parent now. */ | |
7096 | ||
7097 | if (parent_offset != -1) | |
7098 | { | |
4d1795ac TT |
7099 | /* As above, only compute the offset when truly needed. */ |
7100 | int fld_offset = offset; | |
7101 | if (byte_offset_p != nullptr || bit_offset_p != nullptr) | |
7102 | { | |
b610c045 | 7103 | int bit_pos = type->field (parent_offset).loc_bitpos (); |
4d1795ac TT |
7104 | fld_offset += bit_pos / 8; |
7105 | } | |
828d5846 | 7106 | |
940da03e | 7107 | if (find_struct_field (name, type->field (parent_offset).type (), |
dda83cd7 SM |
7108 | fld_offset, field_type_p, byte_offset_p, |
7109 | bit_offset_p, bit_size_p, index_p)) | |
7110 | return 1; | |
828d5846 XR |
7111 | } |
7112 | ||
4c4b4cd2 PH |
7113 | return 0; |
7114 | } | |
7115 | ||
0963b4bd | 7116 | /* Number of user-visible fields in record type TYPE. */ |
4c4b4cd2 | 7117 | |
52ce6436 PH |
7118 | static int |
7119 | num_visible_fields (struct type *type) | |
7120 | { | |
7121 | int n; | |
5b4ee69b | 7122 | |
52ce6436 PH |
7123 | n = 0; |
7124 | find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n); | |
7125 | return n; | |
7126 | } | |
14f9c5c9 | 7127 | |
4c4b4cd2 | 7128 | /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes, |
14f9c5c9 AS |
7129 | and search in it assuming it has (class) type TYPE. |
7130 | If found, return value, else return NULL. | |
7131 | ||
828d5846 XR |
7132 | Searches recursively through wrapper fields (e.g., '_parent'). |
7133 | ||
7134 | In the case of homonyms in the tagged types, please refer to the | |
7135 | long explanation in find_struct_field's function documentation. */ | |
14f9c5c9 | 7136 | |
4c4b4cd2 | 7137 | static struct value * |
108d56a4 | 7138 | ada_search_struct_field (const char *name, struct value *arg, int offset, |
dda83cd7 | 7139 | struct type *type) |
14f9c5c9 AS |
7140 | { |
7141 | int i; | |
828d5846 | 7142 | int parent_offset = -1; |
14f9c5c9 | 7143 | |
5b4ee69b | 7144 | type = ada_check_typedef (type); |
1f704f76 | 7145 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7146 | { |
33d16dd9 | 7147 | const char *t_field_name = type->field (i).name (); |
14f9c5c9 AS |
7148 | |
7149 | if (t_field_name == NULL) | |
dda83cd7 | 7150 | continue; |
14f9c5c9 | 7151 | |
828d5846 | 7152 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7153 | { |
828d5846 XR |
7154 | /* This is a field pointing us to the parent type of a tagged |
7155 | type. As hinted in this function's documentation, we give | |
7156 | preference to fields in the current record first, so what | |
7157 | we do here is just record the index of this field before | |
7158 | we skip it. If it turns out we couldn't find our field | |
7159 | in the current record, then we'll get back to it and search | |
7160 | inside it whether the field might exist in the parent. */ | |
7161 | ||
dda83cd7 SM |
7162 | parent_offset = i; |
7163 | continue; | |
7164 | } | |
828d5846 | 7165 | |
14f9c5c9 | 7166 | else if (field_name_match (t_field_name, name)) |
dda83cd7 | 7167 | return ada_value_primitive_field (arg, offset, i, type); |
14f9c5c9 AS |
7168 | |
7169 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7170 | { |
7171 | struct value *v = /* Do not let indent join lines here. */ | |
7172 | ada_search_struct_field (name, arg, | |
b610c045 | 7173 | offset + type->field (i).loc_bitpos () / 8, |
dda83cd7 | 7174 | type->field (i).type ()); |
5b4ee69b | 7175 | |
dda83cd7 SM |
7176 | if (v != NULL) |
7177 | return v; | |
7178 | } | |
14f9c5c9 AS |
7179 | |
7180 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7181 | { |
0963b4bd | 7182 | /* PNH: Do we ever get here? See find_struct_field. */ |
dda83cd7 SM |
7183 | int j; |
7184 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
b610c045 | 7185 | int var_offset = offset + type->field (i).loc_bitpos () / 8; |
4c4b4cd2 | 7186 | |
dda83cd7 SM |
7187 | for (j = 0; j < field_type->num_fields (); j += 1) |
7188 | { | |
7189 | struct value *v = ada_search_struct_field /* Force line | |
0963b4bd | 7190 | break. */ |
dda83cd7 | 7191 | (name, arg, |
b610c045 | 7192 | var_offset + field_type->field (j).loc_bitpos () / 8, |
dda83cd7 | 7193 | field_type->field (j).type ()); |
5b4ee69b | 7194 | |
dda83cd7 SM |
7195 | if (v != NULL) |
7196 | return v; | |
7197 | } | |
7198 | } | |
14f9c5c9 | 7199 | } |
828d5846 XR |
7200 | |
7201 | /* Field not found so far. If this is a tagged type which | |
7202 | has a parent, try finding that field in the parent now. */ | |
7203 | ||
7204 | if (parent_offset != -1) | |
7205 | { | |
7206 | struct value *v = ada_search_struct_field ( | |
b610c045 | 7207 | name, arg, offset + type->field (parent_offset).loc_bitpos () / 8, |
940da03e | 7208 | type->field (parent_offset).type ()); |
828d5846 XR |
7209 | |
7210 | if (v != NULL) | |
dda83cd7 | 7211 | return v; |
828d5846 XR |
7212 | } |
7213 | ||
14f9c5c9 AS |
7214 | return NULL; |
7215 | } | |
d2e4a39e | 7216 | |
52ce6436 PH |
7217 | static struct value *ada_index_struct_field_1 (int *, struct value *, |
7218 | int, struct type *); | |
7219 | ||
7220 | ||
7221 | /* Return field #INDEX in ARG, where the index is that returned by | |
7222 | * find_struct_field through its INDEX_P argument. Adjust the address | |
7223 | * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE. | |
0963b4bd | 7224 | * If found, return value, else return NULL. */ |
52ce6436 PH |
7225 | |
7226 | static struct value * | |
7227 | ada_index_struct_field (int index, struct value *arg, int offset, | |
7228 | struct type *type) | |
7229 | { | |
7230 | return ada_index_struct_field_1 (&index, arg, offset, type); | |
7231 | } | |
7232 | ||
7233 | ||
7234 | /* Auxiliary function for ada_index_struct_field. Like | |
7235 | * ada_index_struct_field, but takes index from *INDEX_P and modifies | |
0963b4bd | 7236 | * *INDEX_P. */ |
52ce6436 PH |
7237 | |
7238 | static struct value * | |
7239 | ada_index_struct_field_1 (int *index_p, struct value *arg, int offset, | |
7240 | struct type *type) | |
7241 | { | |
7242 | int i; | |
7243 | type = ada_check_typedef (type); | |
7244 | ||
1f704f76 | 7245 | for (i = 0; i < type->num_fields (); i += 1) |
52ce6436 | 7246 | { |
33d16dd9 | 7247 | if (type->field (i).name () == NULL) |
dda83cd7 | 7248 | continue; |
52ce6436 | 7249 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 SM |
7250 | { |
7251 | struct value *v = /* Do not let indent join lines here. */ | |
7252 | ada_index_struct_field_1 (index_p, arg, | |
b610c045 | 7253 | offset + type->field (i).loc_bitpos () / 8, |
940da03e | 7254 | type->field (i).type ()); |
5b4ee69b | 7255 | |
dda83cd7 SM |
7256 | if (v != NULL) |
7257 | return v; | |
7258 | } | |
52ce6436 PH |
7259 | |
7260 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7261 | { |
52ce6436 | 7262 | /* PNH: Do we ever get here? See ada_search_struct_field, |
0963b4bd | 7263 | find_struct_field. */ |
52ce6436 | 7264 | error (_("Cannot assign this kind of variant record")); |
dda83cd7 | 7265 | } |
52ce6436 | 7266 | else if (*index_p == 0) |
dda83cd7 | 7267 | return ada_value_primitive_field (arg, offset, i, type); |
52ce6436 PH |
7268 | else |
7269 | *index_p -= 1; | |
7270 | } | |
7271 | return NULL; | |
7272 | } | |
7273 | ||
3b4de39c | 7274 | /* Return a string representation of type TYPE. */ |
99bbb428 | 7275 | |
3b4de39c | 7276 | static std::string |
99bbb428 PA |
7277 | type_as_string (struct type *type) |
7278 | { | |
d7e74731 | 7279 | string_file tmp_stream; |
99bbb428 | 7280 | |
d7e74731 | 7281 | type_print (type, "", &tmp_stream, -1); |
99bbb428 | 7282 | |
5d10a204 | 7283 | return tmp_stream.release (); |
99bbb428 PA |
7284 | } |
7285 | ||
14f9c5c9 | 7286 | /* Given a type TYPE, look up the type of the component of type named NAME. |
4c4b4cd2 PH |
7287 | If DISPP is non-null, add its byte displacement from the beginning of a |
7288 | structure (pointed to by a value) of type TYPE to *DISPP (does not | |
14f9c5c9 AS |
7289 | work for packed fields). |
7290 | ||
7291 | Matches any field whose name has NAME as a prefix, possibly | |
4c4b4cd2 | 7292 | followed by "___". |
14f9c5c9 | 7293 | |
0963b4bd | 7294 | TYPE can be either a struct or union. If REFOK, TYPE may also |
4c4b4cd2 PH |
7295 | be a (pointer or reference)+ to a struct or union, and the |
7296 | ultimate target type will be searched. | |
14f9c5c9 AS |
7297 | |
7298 | Looks recursively into variant clauses and parent types. | |
7299 | ||
828d5846 XR |
7300 | In the case of homonyms in the tagged types, please refer to the |
7301 | long explanation in find_struct_field's function documentation. | |
7302 | ||
4c4b4cd2 PH |
7303 | If NOERR is nonzero, return NULL if NAME is not suitably defined or |
7304 | TYPE is not a type of the right kind. */ | |
14f9c5c9 | 7305 | |
4c4b4cd2 | 7306 | static struct type * |
a121b7c1 | 7307 | ada_lookup_struct_elt_type (struct type *type, const char *name, int refok, |
dda83cd7 | 7308 | int noerr) |
14f9c5c9 AS |
7309 | { |
7310 | int i; | |
828d5846 | 7311 | int parent_offset = -1; |
14f9c5c9 AS |
7312 | |
7313 | if (name == NULL) | |
7314 | goto BadName; | |
7315 | ||
76a01679 | 7316 | if (refok && type != NULL) |
4c4b4cd2 PH |
7317 | while (1) |
7318 | { | |
dda83cd7 SM |
7319 | type = ada_check_typedef (type); |
7320 | if (type->code () != TYPE_CODE_PTR && type->code () != TYPE_CODE_REF) | |
7321 | break; | |
27710edb | 7322 | type = type->target_type (); |
4c4b4cd2 | 7323 | } |
14f9c5c9 | 7324 | |
76a01679 | 7325 | if (type == NULL |
78134374 SM |
7326 | || (type->code () != TYPE_CODE_STRUCT |
7327 | && type->code () != TYPE_CODE_UNION)) | |
14f9c5c9 | 7328 | { |
4c4b4cd2 | 7329 | if (noerr) |
dda83cd7 | 7330 | return NULL; |
99bbb428 | 7331 | |
3b4de39c PA |
7332 | error (_("Type %s is not a structure or union type"), |
7333 | type != NULL ? type_as_string (type).c_str () : _("(null)")); | |
14f9c5c9 AS |
7334 | } |
7335 | ||
7336 | type = to_static_fixed_type (type); | |
7337 | ||
1f704f76 | 7338 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7339 | { |
33d16dd9 | 7340 | const char *t_field_name = type->field (i).name (); |
14f9c5c9 | 7341 | struct type *t; |
d2e4a39e | 7342 | |
14f9c5c9 | 7343 | if (t_field_name == NULL) |
dda83cd7 | 7344 | continue; |
14f9c5c9 | 7345 | |
828d5846 | 7346 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7347 | { |
828d5846 XR |
7348 | /* This is a field pointing us to the parent type of a tagged |
7349 | type. As hinted in this function's documentation, we give | |
7350 | preference to fields in the current record first, so what | |
7351 | we do here is just record the index of this field before | |
7352 | we skip it. If it turns out we couldn't find our field | |
7353 | in the current record, then we'll get back to it and search | |
7354 | inside it whether the field might exist in the parent. */ | |
7355 | ||
dda83cd7 SM |
7356 | parent_offset = i; |
7357 | continue; | |
7358 | } | |
828d5846 | 7359 | |
14f9c5c9 | 7360 | else if (field_name_match (t_field_name, name)) |
940da03e | 7361 | return type->field (i).type (); |
14f9c5c9 AS |
7362 | |
7363 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7364 | { |
7365 | t = ada_lookup_struct_elt_type (type->field (i).type (), name, | |
7366 | 0, 1); | |
7367 | if (t != NULL) | |
988f6b3d | 7368 | return t; |
dda83cd7 | 7369 | } |
14f9c5c9 AS |
7370 | |
7371 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 SM |
7372 | { |
7373 | int j; | |
7374 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
4c4b4cd2 | 7375 | |
dda83cd7 SM |
7376 | for (j = field_type->num_fields () - 1; j >= 0; j -= 1) |
7377 | { | |
b1f33ddd | 7378 | /* FIXME pnh 2008/01/26: We check for a field that is |
dda83cd7 | 7379 | NOT wrapped in a struct, since the compiler sometimes |
b1f33ddd | 7380 | generates these for unchecked variant types. Revisit |
dda83cd7 | 7381 | if the compiler changes this practice. */ |
33d16dd9 | 7382 | const char *v_field_name = field_type->field (j).name (); |
988f6b3d | 7383 | |
b1f33ddd JB |
7384 | if (v_field_name != NULL |
7385 | && field_name_match (v_field_name, name)) | |
940da03e | 7386 | t = field_type->field (j).type (); |
b1f33ddd | 7387 | else |
940da03e | 7388 | t = ada_lookup_struct_elt_type (field_type->field (j).type (), |
988f6b3d | 7389 | name, 0, 1); |
b1f33ddd | 7390 | |
dda83cd7 | 7391 | if (t != NULL) |
988f6b3d | 7392 | return t; |
dda83cd7 SM |
7393 | } |
7394 | } | |
14f9c5c9 AS |
7395 | |
7396 | } | |
7397 | ||
828d5846 XR |
7398 | /* Field not found so far. If this is a tagged type which |
7399 | has a parent, try finding that field in the parent now. */ | |
7400 | ||
7401 | if (parent_offset != -1) | |
7402 | { | |
dda83cd7 | 7403 | struct type *t; |
828d5846 | 7404 | |
dda83cd7 SM |
7405 | t = ada_lookup_struct_elt_type (type->field (parent_offset).type (), |
7406 | name, 0, 1); | |
7407 | if (t != NULL) | |
828d5846 XR |
7408 | return t; |
7409 | } | |
7410 | ||
14f9c5c9 | 7411 | BadName: |
d2e4a39e | 7412 | if (!noerr) |
14f9c5c9 | 7413 | { |
2b2798cc | 7414 | const char *name_str = name != NULL ? name : _("<null>"); |
99bbb428 PA |
7415 | |
7416 | error (_("Type %s has no component named %s"), | |
3b4de39c | 7417 | type_as_string (type).c_str (), name_str); |
14f9c5c9 AS |
7418 | } |
7419 | ||
7420 | return NULL; | |
7421 | } | |
7422 | ||
b1f33ddd JB |
7423 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
7424 | within a value of type OUTER_TYPE, return true iff VAR_TYPE | |
7425 | represents an unchecked union (that is, the variant part of a | |
0963b4bd | 7426 | record that is named in an Unchecked_Union pragma). */ |
b1f33ddd JB |
7427 | |
7428 | static int | |
7429 | is_unchecked_variant (struct type *var_type, struct type *outer_type) | |
7430 | { | |
a121b7c1 | 7431 | const char *discrim_name = ada_variant_discrim_name (var_type); |
5b4ee69b | 7432 | |
988f6b3d | 7433 | return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1) == NULL); |
b1f33ddd JB |
7434 | } |
7435 | ||
7436 | ||
14f9c5c9 | 7437 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
d8af9068 | 7438 | within OUTER, determine which variant clause (field number in VAR_TYPE, |
4c4b4cd2 | 7439 | numbering from 0) is applicable. Returns -1 if none are. */ |
14f9c5c9 | 7440 | |
d2e4a39e | 7441 | int |
d8af9068 | 7442 | ada_which_variant_applies (struct type *var_type, struct value *outer) |
14f9c5c9 AS |
7443 | { |
7444 | int others_clause; | |
7445 | int i; | |
a121b7c1 | 7446 | const char *discrim_name = ada_variant_discrim_name (var_type); |
0c281816 | 7447 | struct value *discrim; |
14f9c5c9 AS |
7448 | LONGEST discrim_val; |
7449 | ||
012370f6 TT |
7450 | /* Using plain value_from_contents_and_address here causes problems |
7451 | because we will end up trying to resolve a type that is currently | |
7452 | being constructed. */ | |
0c281816 JB |
7453 | discrim = ada_value_struct_elt (outer, discrim_name, 1); |
7454 | if (discrim == NULL) | |
14f9c5c9 | 7455 | return -1; |
0c281816 | 7456 | discrim_val = value_as_long (discrim); |
14f9c5c9 AS |
7457 | |
7458 | others_clause = -1; | |
1f704f76 | 7459 | for (i = 0; i < var_type->num_fields (); i += 1) |
14f9c5c9 AS |
7460 | { |
7461 | if (ada_is_others_clause (var_type, i)) | |
dda83cd7 | 7462 | others_clause = i; |
14f9c5c9 | 7463 | else if (ada_in_variant (discrim_val, var_type, i)) |
dda83cd7 | 7464 | return i; |
14f9c5c9 AS |
7465 | } |
7466 | ||
7467 | return others_clause; | |
7468 | } | |
d2e4a39e | 7469 | \f |
14f9c5c9 AS |
7470 | |
7471 | ||
dda83cd7 | 7472 | /* Dynamic-Sized Records */ |
14f9c5c9 AS |
7473 | |
7474 | /* Strategy: The type ostensibly attached to a value with dynamic size | |
7475 | (i.e., a size that is not statically recorded in the debugging | |
7476 | data) does not accurately reflect the size or layout of the value. | |
7477 | Our strategy is to convert these values to values with accurate, | |
4c4b4cd2 | 7478 | conventional types that are constructed on the fly. */ |
14f9c5c9 AS |
7479 | |
7480 | /* There is a subtle and tricky problem here. In general, we cannot | |
7481 | determine the size of dynamic records without its data. However, | |
7482 | the 'struct value' data structure, which GDB uses to represent | |
7483 | quantities in the inferior process (the target), requires the size | |
7484 | of the type at the time of its allocation in order to reserve space | |
7485 | for GDB's internal copy of the data. That's why the | |
7486 | 'to_fixed_xxx_type' routines take (target) addresses as parameters, | |
4c4b4cd2 | 7487 | rather than struct value*s. |
14f9c5c9 AS |
7488 | |
7489 | However, GDB's internal history variables ($1, $2, etc.) are | |
7490 | struct value*s containing internal copies of the data that are not, in | |
7491 | general, the same as the data at their corresponding addresses in | |
7492 | the target. Fortunately, the types we give to these values are all | |
7493 | conventional, fixed-size types (as per the strategy described | |
7494 | above), so that we don't usually have to perform the | |
7495 | 'to_fixed_xxx_type' conversions to look at their values. | |
7496 | Unfortunately, there is one exception: if one of the internal | |
7497 | history variables is an array whose elements are unconstrained | |
7498 | records, then we will need to create distinct fixed types for each | |
7499 | element selected. */ | |
7500 | ||
7501 | /* The upshot of all of this is that many routines take a (type, host | |
7502 | address, target address) triple as arguments to represent a value. | |
7503 | The host address, if non-null, is supposed to contain an internal | |
7504 | copy of the relevant data; otherwise, the program is to consult the | |
4c4b4cd2 | 7505 | target at the target address. */ |
14f9c5c9 AS |
7506 | |
7507 | /* Assuming that VAL0 represents a pointer value, the result of | |
7508 | dereferencing it. Differs from value_ind in its treatment of | |
4c4b4cd2 | 7509 | dynamic-sized types. */ |
14f9c5c9 | 7510 | |
d2e4a39e AS |
7511 | struct value * |
7512 | ada_value_ind (struct value *val0) | |
14f9c5c9 | 7513 | { |
c48db5ca | 7514 | struct value *val = value_ind (val0); |
5b4ee69b | 7515 | |
d0c97917 | 7516 | if (ada_is_tagged_type (val->type (), 0)) |
b50d69b5 JG |
7517 | val = ada_tag_value_at_base_address (val); |
7518 | ||
4c4b4cd2 | 7519 | return ada_to_fixed_value (val); |
14f9c5c9 AS |
7520 | } |
7521 | ||
7522 | /* The value resulting from dereferencing any "reference to" | |
4c4b4cd2 PH |
7523 | qualifiers on VAL0. */ |
7524 | ||
d2e4a39e AS |
7525 | static struct value * |
7526 | ada_coerce_ref (struct value *val0) | |
7527 | { | |
d0c97917 | 7528 | if (val0->type ()->code () == TYPE_CODE_REF) |
d2e4a39e AS |
7529 | { |
7530 | struct value *val = val0; | |
5b4ee69b | 7531 | |
994b9211 | 7532 | val = coerce_ref (val); |
b50d69b5 | 7533 | |
d0c97917 | 7534 | if (ada_is_tagged_type (val->type (), 0)) |
b50d69b5 JG |
7535 | val = ada_tag_value_at_base_address (val); |
7536 | ||
4c4b4cd2 | 7537 | return ada_to_fixed_value (val); |
d2e4a39e AS |
7538 | } |
7539 | else | |
14f9c5c9 AS |
7540 | return val0; |
7541 | } | |
7542 | ||
4c4b4cd2 | 7543 | /* Return the bit alignment required for field #F of template type TYPE. */ |
14f9c5c9 AS |
7544 | |
7545 | static unsigned int | |
ebf56fd3 | 7546 | field_alignment (struct type *type, int f) |
14f9c5c9 | 7547 | { |
33d16dd9 | 7548 | const char *name = type->field (f).name (); |
64a1bf19 | 7549 | int len; |
14f9c5c9 AS |
7550 | int align_offset; |
7551 | ||
64a1bf19 JB |
7552 | /* The field name should never be null, unless the debugging information |
7553 | is somehow malformed. In this case, we assume the field does not | |
7554 | require any alignment. */ | |
7555 | if (name == NULL) | |
7556 | return 1; | |
7557 | ||
7558 | len = strlen (name); | |
7559 | ||
4c4b4cd2 PH |
7560 | if (!isdigit (name[len - 1])) |
7561 | return 1; | |
14f9c5c9 | 7562 | |
d2e4a39e | 7563 | if (isdigit (name[len - 2])) |
14f9c5c9 AS |
7564 | align_offset = len - 2; |
7565 | else | |
7566 | align_offset = len - 1; | |
7567 | ||
61012eef | 7568 | if (align_offset < 7 || !startswith (name + align_offset - 6, "___XV")) |
14f9c5c9 AS |
7569 | return TARGET_CHAR_BIT; |
7570 | ||
4c4b4cd2 PH |
7571 | return atoi (name + align_offset) * TARGET_CHAR_BIT; |
7572 | } | |
7573 | ||
852dff6c | 7574 | /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */ |
4c4b4cd2 | 7575 | |
852dff6c JB |
7576 | static struct symbol * |
7577 | ada_find_any_type_symbol (const char *name) | |
4c4b4cd2 PH |
7578 | { |
7579 | struct symbol *sym; | |
7580 | ||
7581 | sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN); | |
66d7f48f | 7582 | if (sym != NULL && sym->aclass () == LOC_TYPEDEF) |
4c4b4cd2 PH |
7583 | return sym; |
7584 | ||
4186eb54 KS |
7585 | sym = standard_lookup (name, NULL, STRUCT_DOMAIN); |
7586 | return sym; | |
14f9c5c9 AS |
7587 | } |
7588 | ||
dddfab26 UW |
7589 | /* Find a type named NAME. Ignores ambiguity. This routine will look |
7590 | solely for types defined by debug info, it will not search the GDB | |
7591 | primitive types. */ | |
4c4b4cd2 | 7592 | |
852dff6c | 7593 | static struct type * |
ebf56fd3 | 7594 | ada_find_any_type (const char *name) |
14f9c5c9 | 7595 | { |
852dff6c | 7596 | struct symbol *sym = ada_find_any_type_symbol (name); |
14f9c5c9 | 7597 | |
14f9c5c9 | 7598 | if (sym != NULL) |
5f9c5a63 | 7599 | return sym->type (); |
14f9c5c9 | 7600 | |
dddfab26 | 7601 | return NULL; |
14f9c5c9 AS |
7602 | } |
7603 | ||
739593e0 JB |
7604 | /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol |
7605 | associated with NAME_SYM's name. NAME_SYM may itself be a renaming | |
7606 | symbol, in which case it is returned. Otherwise, this looks for | |
7607 | symbols whose name is that of NAME_SYM suffixed with "___XR". | |
7608 | Return symbol if found, and NULL otherwise. */ | |
4c4b4cd2 | 7609 | |
c0e70c62 TT |
7610 | static bool |
7611 | ada_is_renaming_symbol (struct symbol *name_sym) | |
aeb5907d | 7612 | { |
987012b8 | 7613 | const char *name = name_sym->linkage_name (); |
c0e70c62 | 7614 | return strstr (name, "___XR") != NULL; |
4c4b4cd2 PH |
7615 | } |
7616 | ||
14f9c5c9 | 7617 | /* Because of GNAT encoding conventions, several GDB symbols may match a |
4c4b4cd2 | 7618 | given type name. If the type denoted by TYPE0 is to be preferred to |
14f9c5c9 | 7619 | that of TYPE1 for purposes of type printing, return non-zero; |
4c4b4cd2 PH |
7620 | otherwise return 0. */ |
7621 | ||
14f9c5c9 | 7622 | int |
d2e4a39e | 7623 | ada_prefer_type (struct type *type0, struct type *type1) |
14f9c5c9 AS |
7624 | { |
7625 | if (type1 == NULL) | |
7626 | return 1; | |
7627 | else if (type0 == NULL) | |
7628 | return 0; | |
78134374 | 7629 | else if (type1->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7630 | return 1; |
78134374 | 7631 | else if (type0->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7632 | return 0; |
7d93a1e0 | 7633 | else if (type1->name () == NULL && type0->name () != NULL) |
4c4b4cd2 | 7634 | return 1; |
ad82864c | 7635 | else if (ada_is_constrained_packed_array_type (type0)) |
14f9c5c9 | 7636 | return 1; |
4c4b4cd2 | 7637 | else if (ada_is_array_descriptor_type (type0) |
dda83cd7 | 7638 | && !ada_is_array_descriptor_type (type1)) |
14f9c5c9 | 7639 | return 1; |
aeb5907d JB |
7640 | else |
7641 | { | |
7d93a1e0 SM |
7642 | const char *type0_name = type0->name (); |
7643 | const char *type1_name = type1->name (); | |
aeb5907d JB |
7644 | |
7645 | if (type0_name != NULL && strstr (type0_name, "___XR") != NULL | |
7646 | && (type1_name == NULL || strstr (type1_name, "___XR") == NULL)) | |
7647 | return 1; | |
7648 | } | |
14f9c5c9 AS |
7649 | return 0; |
7650 | } | |
7651 | ||
e86ca25f TT |
7652 | /* The name of TYPE, which is its TYPE_NAME. Null if TYPE is |
7653 | null. */ | |
4c4b4cd2 | 7654 | |
0d5cff50 | 7655 | const char * |
d2e4a39e | 7656 | ada_type_name (struct type *type) |
14f9c5c9 | 7657 | { |
d2e4a39e | 7658 | if (type == NULL) |
14f9c5c9 | 7659 | return NULL; |
7d93a1e0 | 7660 | return type->name (); |
14f9c5c9 AS |
7661 | } |
7662 | ||
b4ba55a1 JB |
7663 | /* Search the list of "descriptive" types associated to TYPE for a type |
7664 | whose name is NAME. */ | |
7665 | ||
7666 | static struct type * | |
7667 | find_parallel_type_by_descriptive_type (struct type *type, const char *name) | |
7668 | { | |
931e5bc3 | 7669 | struct type *result, *tmp; |
b4ba55a1 | 7670 | |
c6044dd1 JB |
7671 | if (ada_ignore_descriptive_types_p) |
7672 | return NULL; | |
7673 | ||
b4ba55a1 JB |
7674 | /* If there no descriptive-type info, then there is no parallel type |
7675 | to be found. */ | |
7676 | if (!HAVE_GNAT_AUX_INFO (type)) | |
7677 | return NULL; | |
7678 | ||
7679 | result = TYPE_DESCRIPTIVE_TYPE (type); | |
7680 | while (result != NULL) | |
7681 | { | |
0d5cff50 | 7682 | const char *result_name = ada_type_name (result); |
b4ba55a1 JB |
7683 | |
7684 | if (result_name == NULL) | |
dda83cd7 SM |
7685 | { |
7686 | warning (_("unexpected null name on descriptive type")); | |
7687 | return NULL; | |
7688 | } | |
b4ba55a1 JB |
7689 | |
7690 | /* If the names match, stop. */ | |
7691 | if (strcmp (result_name, name) == 0) | |
7692 | break; | |
7693 | ||
7694 | /* Otherwise, look at the next item on the list, if any. */ | |
7695 | if (HAVE_GNAT_AUX_INFO (result)) | |
931e5bc3 JG |
7696 | tmp = TYPE_DESCRIPTIVE_TYPE (result); |
7697 | else | |
7698 | tmp = NULL; | |
7699 | ||
7700 | /* If not found either, try after having resolved the typedef. */ | |
7701 | if (tmp != NULL) | |
7702 | result = tmp; | |
b4ba55a1 | 7703 | else |
931e5bc3 | 7704 | { |
f168693b | 7705 | result = check_typedef (result); |
931e5bc3 JG |
7706 | if (HAVE_GNAT_AUX_INFO (result)) |
7707 | result = TYPE_DESCRIPTIVE_TYPE (result); | |
7708 | else | |
7709 | result = NULL; | |
7710 | } | |
b4ba55a1 JB |
7711 | } |
7712 | ||
7713 | /* If we didn't find a match, see whether this is a packed array. With | |
7714 | older compilers, the descriptive type information is either absent or | |
7715 | irrelevant when it comes to packed arrays so the above lookup fails. | |
7716 | Fall back to using a parallel lookup by name in this case. */ | |
12ab9e09 | 7717 | if (result == NULL && ada_is_constrained_packed_array_type (type)) |
b4ba55a1 JB |
7718 | return ada_find_any_type (name); |
7719 | ||
7720 | return result; | |
7721 | } | |
7722 | ||
7723 | /* Find a parallel type to TYPE with the specified NAME, using the | |
7724 | descriptive type taken from the debugging information, if available, | |
7725 | and otherwise using the (slower) name-based method. */ | |
7726 | ||
7727 | static struct type * | |
7728 | ada_find_parallel_type_with_name (struct type *type, const char *name) | |
7729 | { | |
7730 | struct type *result = NULL; | |
7731 | ||
7732 | if (HAVE_GNAT_AUX_INFO (type)) | |
7733 | result = find_parallel_type_by_descriptive_type (type, name); | |
7734 | else | |
7735 | result = ada_find_any_type (name); | |
7736 | ||
7737 | return result; | |
7738 | } | |
7739 | ||
7740 | /* Same as above, but specify the name of the parallel type by appending | |
4c4b4cd2 | 7741 | SUFFIX to the name of TYPE. */ |
14f9c5c9 | 7742 | |
d2e4a39e | 7743 | struct type * |
ebf56fd3 | 7744 | ada_find_parallel_type (struct type *type, const char *suffix) |
14f9c5c9 | 7745 | { |
0d5cff50 | 7746 | char *name; |
fe978cb0 | 7747 | const char *type_name = ada_type_name (type); |
14f9c5c9 | 7748 | int len; |
d2e4a39e | 7749 | |
fe978cb0 | 7750 | if (type_name == NULL) |
14f9c5c9 AS |
7751 | return NULL; |
7752 | ||
fe978cb0 | 7753 | len = strlen (type_name); |
14f9c5c9 | 7754 | |
b4ba55a1 | 7755 | name = (char *) alloca (len + strlen (suffix) + 1); |
14f9c5c9 | 7756 | |
fe978cb0 | 7757 | strcpy (name, type_name); |
14f9c5c9 AS |
7758 | strcpy (name + len, suffix); |
7759 | ||
b4ba55a1 | 7760 | return ada_find_parallel_type_with_name (type, name); |
14f9c5c9 AS |
7761 | } |
7762 | ||
14f9c5c9 | 7763 | /* If TYPE is a variable-size record type, return the corresponding template |
4c4b4cd2 | 7764 | type describing its fields. Otherwise, return NULL. */ |
14f9c5c9 | 7765 | |
d2e4a39e AS |
7766 | static struct type * |
7767 | dynamic_template_type (struct type *type) | |
14f9c5c9 | 7768 | { |
61ee279c | 7769 | type = ada_check_typedef (type); |
14f9c5c9 | 7770 | |
78134374 | 7771 | if (type == NULL || type->code () != TYPE_CODE_STRUCT |
d2e4a39e | 7772 | || ada_type_name (type) == NULL) |
14f9c5c9 | 7773 | return NULL; |
d2e4a39e | 7774 | else |
14f9c5c9 AS |
7775 | { |
7776 | int len = strlen (ada_type_name (type)); | |
5b4ee69b | 7777 | |
4c4b4cd2 | 7778 | if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0) |
dda83cd7 | 7779 | return type; |
14f9c5c9 | 7780 | else |
dda83cd7 | 7781 | return ada_find_parallel_type (type, "___XVE"); |
14f9c5c9 AS |
7782 | } |
7783 | } | |
7784 | ||
7785 | /* Assuming that TEMPL_TYPE is a union or struct type, returns | |
4c4b4cd2 | 7786 | non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */ |
14f9c5c9 | 7787 | |
d2e4a39e AS |
7788 | static int |
7789 | is_dynamic_field (struct type *templ_type, int field_num) | |
14f9c5c9 | 7790 | { |
33d16dd9 | 7791 | const char *name = templ_type->field (field_num).name (); |
5b4ee69b | 7792 | |
d2e4a39e | 7793 | return name != NULL |
940da03e | 7794 | && templ_type->field (field_num).type ()->code () == TYPE_CODE_PTR |
14f9c5c9 AS |
7795 | && strstr (name, "___XVL") != NULL; |
7796 | } | |
7797 | ||
4c4b4cd2 PH |
7798 | /* The index of the variant field of TYPE, or -1 if TYPE does not |
7799 | represent a variant record type. */ | |
14f9c5c9 | 7800 | |
d2e4a39e | 7801 | static int |
4c4b4cd2 | 7802 | variant_field_index (struct type *type) |
14f9c5c9 AS |
7803 | { |
7804 | int f; | |
7805 | ||
78134374 | 7806 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
4c4b4cd2 PH |
7807 | return -1; |
7808 | ||
1f704f76 | 7809 | for (f = 0; f < type->num_fields (); f += 1) |
4c4b4cd2 PH |
7810 | { |
7811 | if (ada_is_variant_part (type, f)) | |
dda83cd7 | 7812 | return f; |
4c4b4cd2 PH |
7813 | } |
7814 | return -1; | |
14f9c5c9 AS |
7815 | } |
7816 | ||
4c4b4cd2 PH |
7817 | /* A record type with no fields. */ |
7818 | ||
d2e4a39e | 7819 | static struct type * |
fe978cb0 | 7820 | empty_record (struct type *templ) |
14f9c5c9 | 7821 | { |
fe978cb0 | 7822 | struct type *type = alloc_type_copy (templ); |
5b4ee69b | 7823 | |
67607e24 | 7824 | type->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7825 | INIT_NONE_SPECIFIC (type); |
d0e39ea2 | 7826 | type->set_name ("<empty>"); |
b6cdbc9a | 7827 | type->set_length (0); |
14f9c5c9 AS |
7828 | return type; |
7829 | } | |
7830 | ||
7831 | /* An ordinary record type (with fixed-length fields) that describes | |
4c4b4cd2 PH |
7832 | the value of type TYPE at VALADDR or ADDRESS (see comments at |
7833 | the beginning of this section) VAL according to GNAT conventions. | |
7834 | DVAL0 should describe the (portion of a) record that contains any | |
d0c97917 | 7835 | necessary discriminants. It should be NULL if VAL->type () is |
14f9c5c9 AS |
7836 | an outer-level type (i.e., as opposed to a branch of a variant.) A |
7837 | variant field (unless unchecked) is replaced by a particular branch | |
4c4b4cd2 | 7838 | of the variant. |
14f9c5c9 | 7839 | |
4c4b4cd2 PH |
7840 | If not KEEP_DYNAMIC_FIELDS, then all fields whose position or |
7841 | length are not statically known are discarded. As a consequence, | |
7842 | VALADDR, ADDRESS and DVAL0 are ignored. | |
7843 | ||
7844 | NOTE: Limitations: For now, we assume that dynamic fields and | |
7845 | variants occupy whole numbers of bytes. However, they need not be | |
7846 | byte-aligned. */ | |
7847 | ||
7848 | struct type * | |
10a2c479 | 7849 | ada_template_to_fixed_record_type_1 (struct type *type, |
fc1a4b47 | 7850 | const gdb_byte *valaddr, |
dda83cd7 SM |
7851 | CORE_ADDR address, struct value *dval0, |
7852 | int keep_dynamic_fields) | |
14f9c5c9 | 7853 | { |
d2e4a39e AS |
7854 | struct value *dval; |
7855 | struct type *rtype; | |
14f9c5c9 | 7856 | int nfields, bit_len; |
4c4b4cd2 | 7857 | int variant_field; |
14f9c5c9 | 7858 | long off; |
d94e4f4f | 7859 | int fld_bit_len; |
14f9c5c9 AS |
7860 | int f; |
7861 | ||
65558ca5 TT |
7862 | scoped_value_mark mark; |
7863 | ||
4c4b4cd2 PH |
7864 | /* Compute the number of fields in this record type that are going |
7865 | to be processed: unless keep_dynamic_fields, this includes only | |
7866 | fields whose position and length are static will be processed. */ | |
7867 | if (keep_dynamic_fields) | |
1f704f76 | 7868 | nfields = type->num_fields (); |
4c4b4cd2 PH |
7869 | else |
7870 | { | |
7871 | nfields = 0; | |
1f704f76 | 7872 | while (nfields < type->num_fields () |
dda83cd7 SM |
7873 | && !ada_is_variant_part (type, nfields) |
7874 | && !is_dynamic_field (type, nfields)) | |
7875 | nfields++; | |
4c4b4cd2 PH |
7876 | } |
7877 | ||
e9bb382b | 7878 | rtype = alloc_type_copy (type); |
67607e24 | 7879 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7880 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 7881 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
7882 | rtype->set_fields |
7883 | ((struct field *) TYPE_ZALLOC (rtype, nfields * sizeof (struct field))); | |
d0e39ea2 | 7884 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 7885 | rtype->set_is_fixed_instance (true); |
14f9c5c9 | 7886 | |
d2e4a39e AS |
7887 | off = 0; |
7888 | bit_len = 0; | |
4c4b4cd2 PH |
7889 | variant_field = -1; |
7890 | ||
14f9c5c9 AS |
7891 | for (f = 0; f < nfields; f += 1) |
7892 | { | |
a89febbd | 7893 | off = align_up (off, field_alignment (type, f)) |
b610c045 | 7894 | + type->field (f).loc_bitpos (); |
cd3f655c | 7895 | rtype->field (f).set_loc_bitpos (off); |
d2e4a39e | 7896 | TYPE_FIELD_BITSIZE (rtype, f) = 0; |
14f9c5c9 | 7897 | |
d2e4a39e | 7898 | if (ada_is_variant_part (type, f)) |
dda83cd7 SM |
7899 | { |
7900 | variant_field = f; | |
7901 | fld_bit_len = 0; | |
7902 | } | |
14f9c5c9 | 7903 | else if (is_dynamic_field (type, f)) |
dda83cd7 | 7904 | { |
284614f0 JB |
7905 | const gdb_byte *field_valaddr = valaddr; |
7906 | CORE_ADDR field_address = address; | |
27710edb | 7907 | struct type *field_type = type->field (f).type ()->target_type (); |
284614f0 | 7908 | |
dda83cd7 | 7909 | if (dval0 == NULL) |
b5304971 | 7910 | { |
012370f6 TT |
7911 | /* Using plain value_from_contents_and_address here |
7912 | causes problems because we will end up trying to | |
7913 | resolve a type that is currently being | |
7914 | constructed. */ | |
7915 | dval = value_from_contents_and_address_unresolved (rtype, | |
7916 | valaddr, | |
7917 | address); | |
d0c97917 | 7918 | rtype = dval->type (); |
b5304971 | 7919 | } |
dda83cd7 SM |
7920 | else |
7921 | dval = dval0; | |
4c4b4cd2 | 7922 | |
284614f0 JB |
7923 | /* If the type referenced by this field is an aligner type, we need |
7924 | to unwrap that aligner type, because its size might not be set. | |
7925 | Keeping the aligner type would cause us to compute the wrong | |
7926 | size for this field, impacting the offset of the all the fields | |
7927 | that follow this one. */ | |
7928 | if (ada_is_aligner_type (field_type)) | |
7929 | { | |
b610c045 | 7930 | long field_offset = type->field (f).loc_bitpos (); |
284614f0 JB |
7931 | |
7932 | field_valaddr = cond_offset_host (field_valaddr, field_offset); | |
7933 | field_address = cond_offset_target (field_address, field_offset); | |
7934 | field_type = ada_aligned_type (field_type); | |
7935 | } | |
7936 | ||
7937 | field_valaddr = cond_offset_host (field_valaddr, | |
7938 | off / TARGET_CHAR_BIT); | |
7939 | field_address = cond_offset_target (field_address, | |
7940 | off / TARGET_CHAR_BIT); | |
7941 | ||
7942 | /* Get the fixed type of the field. Note that, in this case, | |
7943 | we do not want to get the real type out of the tag: if | |
7944 | the current field is the parent part of a tagged record, | |
7945 | we will get the tag of the object. Clearly wrong: the real | |
7946 | type of the parent is not the real type of the child. We | |
7947 | would end up in an infinite loop. */ | |
7948 | field_type = ada_get_base_type (field_type); | |
7949 | field_type = ada_to_fixed_type (field_type, field_valaddr, | |
7950 | field_address, dval, 0); | |
7951 | ||
5d14b6e5 | 7952 | rtype->field (f).set_type (field_type); |
33d16dd9 | 7953 | rtype->field (f).set_name (type->field (f).name ()); |
27f2a97b JB |
7954 | /* The multiplication can potentially overflow. But because |
7955 | the field length has been size-checked just above, and | |
7956 | assuming that the maximum size is a reasonable value, | |
7957 | an overflow should not happen in practice. So rather than | |
7958 | adding overflow recovery code to this already complex code, | |
7959 | we just assume that it's not going to happen. */ | |
df86565b | 7960 | fld_bit_len = rtype->field (f).type ()->length () * TARGET_CHAR_BIT; |
dda83cd7 | 7961 | } |
14f9c5c9 | 7962 | else |
dda83cd7 | 7963 | { |
5ded5331 JB |
7964 | /* Note: If this field's type is a typedef, it is important |
7965 | to preserve the typedef layer. | |
7966 | ||
7967 | Otherwise, we might be transforming a typedef to a fat | |
7968 | pointer (encoding a pointer to an unconstrained array), | |
7969 | into a basic fat pointer (encoding an unconstrained | |
7970 | array). As both types are implemented using the same | |
7971 | structure, the typedef is the only clue which allows us | |
7972 | to distinguish between the two options. Stripping it | |
7973 | would prevent us from printing this field appropriately. */ | |
dda83cd7 | 7974 | rtype->field (f).set_type (type->field (f).type ()); |
33d16dd9 | 7975 | rtype->field (f).set_name (type->field (f).name ()); |
dda83cd7 SM |
7976 | if (TYPE_FIELD_BITSIZE (type, f) > 0) |
7977 | fld_bit_len = | |
7978 | TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f); | |
7979 | else | |
5ded5331 | 7980 | { |
940da03e | 7981 | struct type *field_type = type->field (f).type (); |
5ded5331 JB |
7982 | |
7983 | /* We need to be careful of typedefs when computing | |
7984 | the length of our field. If this is a typedef, | |
7985 | get the length of the target type, not the length | |
7986 | of the typedef. */ | |
78134374 | 7987 | if (field_type->code () == TYPE_CODE_TYPEDEF) |
5ded5331 JB |
7988 | field_type = ada_typedef_target_type (field_type); |
7989 | ||
dda83cd7 | 7990 | fld_bit_len = |
df86565b | 7991 | ada_check_typedef (field_type)->length () * TARGET_CHAR_BIT; |
5ded5331 | 7992 | } |
dda83cd7 | 7993 | } |
14f9c5c9 | 7994 | if (off + fld_bit_len > bit_len) |
dda83cd7 | 7995 | bit_len = off + fld_bit_len; |
d94e4f4f | 7996 | off += fld_bit_len; |
b6cdbc9a | 7997 | rtype->set_length (align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT); |
14f9c5c9 | 7998 | } |
4c4b4cd2 PH |
7999 | |
8000 | /* We handle the variant part, if any, at the end because of certain | |
b1f33ddd | 8001 | odd cases in which it is re-ordered so as NOT to be the last field of |
4c4b4cd2 PH |
8002 | the record. This can happen in the presence of representation |
8003 | clauses. */ | |
8004 | if (variant_field >= 0) | |
8005 | { | |
8006 | struct type *branch_type; | |
8007 | ||
b610c045 | 8008 | off = rtype->field (variant_field).loc_bitpos (); |
4c4b4cd2 PH |
8009 | |
8010 | if (dval0 == NULL) | |
9f1f738a | 8011 | { |
012370f6 TT |
8012 | /* Using plain value_from_contents_and_address here causes |
8013 | problems because we will end up trying to resolve a type | |
8014 | that is currently being constructed. */ | |
8015 | dval = value_from_contents_and_address_unresolved (rtype, valaddr, | |
8016 | address); | |
d0c97917 | 8017 | rtype = dval->type (); |
9f1f738a | 8018 | } |
4c4b4cd2 | 8019 | else |
dda83cd7 | 8020 | dval = dval0; |
4c4b4cd2 PH |
8021 | |
8022 | branch_type = | |
dda83cd7 SM |
8023 | to_fixed_variant_branch_type |
8024 | (type->field (variant_field).type (), | |
8025 | cond_offset_host (valaddr, off / TARGET_CHAR_BIT), | |
8026 | cond_offset_target (address, off / TARGET_CHAR_BIT), dval); | |
4c4b4cd2 | 8027 | if (branch_type == NULL) |
dda83cd7 SM |
8028 | { |
8029 | for (f = variant_field + 1; f < rtype->num_fields (); f += 1) | |
8030 | rtype->field (f - 1) = rtype->field (f); | |
5e33d5f4 | 8031 | rtype->set_num_fields (rtype->num_fields () - 1); |
dda83cd7 | 8032 | } |
4c4b4cd2 | 8033 | else |
dda83cd7 SM |
8034 | { |
8035 | rtype->field (variant_field).set_type (branch_type); | |
d3fd12df | 8036 | rtype->field (variant_field).set_name ("S"); |
dda83cd7 | 8037 | fld_bit_len = |
df86565b | 8038 | rtype->field (variant_field).type ()->length () * TARGET_CHAR_BIT; |
dda83cd7 SM |
8039 | if (off + fld_bit_len > bit_len) |
8040 | bit_len = off + fld_bit_len; | |
b6cdbc9a SM |
8041 | |
8042 | rtype->set_length | |
8043 | (align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT); | |
dda83cd7 | 8044 | } |
4c4b4cd2 PH |
8045 | } |
8046 | ||
714e53ab PH |
8047 | /* According to exp_dbug.ads, the size of TYPE for variable-size records |
8048 | should contain the alignment of that record, which should be a strictly | |
8049 | positive value. If null or negative, then something is wrong, most | |
8050 | probably in the debug info. In that case, we don't round up the size | |
0963b4bd | 8051 | of the resulting type. If this record is not part of another structure, |
714e53ab | 8052 | the current RTYPE length might be good enough for our purposes. */ |
df86565b | 8053 | if (type->length () <= 0) |
714e53ab | 8054 | { |
7d93a1e0 | 8055 | if (rtype->name ()) |
cc1defb1 | 8056 | warning (_("Invalid type size for `%s' detected: %s."), |
df86565b | 8057 | rtype->name (), pulongest (type->length ())); |
323e0a4a | 8058 | else |
cc1defb1 | 8059 | warning (_("Invalid type size for <unnamed> detected: %s."), |
df86565b | 8060 | pulongest (type->length ())); |
714e53ab PH |
8061 | } |
8062 | else | |
df86565b | 8063 | rtype->set_length (align_up (rtype->length (), type->length ())); |
14f9c5c9 | 8064 | |
14f9c5c9 AS |
8065 | return rtype; |
8066 | } | |
8067 | ||
4c4b4cd2 PH |
8068 | /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS |
8069 | of 1. */ | |
14f9c5c9 | 8070 | |
d2e4a39e | 8071 | static struct type * |
fc1a4b47 | 8072 | template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8073 | CORE_ADDR address, struct value *dval0) |
4c4b4cd2 PH |
8074 | { |
8075 | return ada_template_to_fixed_record_type_1 (type, valaddr, | |
dda83cd7 | 8076 | address, dval0, 1); |
4c4b4cd2 PH |
8077 | } |
8078 | ||
8079 | /* An ordinary record type in which ___XVL-convention fields and | |
8080 | ___XVU- and ___XVN-convention field types in TYPE0 are replaced with | |
8081 | static approximations, containing all possible fields. Uses | |
8082 | no runtime values. Useless for use in values, but that's OK, | |
8083 | since the results are used only for type determinations. Works on both | |
8084 | structs and unions. Representation note: to save space, we memorize | |
27710edb | 8085 | the result of this function in the type::target_type of the |
4c4b4cd2 PH |
8086 | template type. */ |
8087 | ||
8088 | static struct type * | |
8089 | template_to_static_fixed_type (struct type *type0) | |
14f9c5c9 AS |
8090 | { |
8091 | struct type *type; | |
8092 | int nfields; | |
8093 | int f; | |
8094 | ||
9e195661 | 8095 | /* No need no do anything if the input type is already fixed. */ |
22c4c60c | 8096 | if (type0->is_fixed_instance ()) |
9e195661 PMR |
8097 | return type0; |
8098 | ||
8099 | /* Likewise if we already have computed the static approximation. */ | |
27710edb SM |
8100 | if (type0->target_type () != NULL) |
8101 | return type0->target_type (); | |
4c4b4cd2 | 8102 | |
9e195661 | 8103 | /* Don't clone TYPE0 until we are sure we are going to need a copy. */ |
4c4b4cd2 | 8104 | type = type0; |
1f704f76 | 8105 | nfields = type0->num_fields (); |
9e195661 PMR |
8106 | |
8107 | /* Whether or not we cloned TYPE0, cache the result so that we don't do | |
8108 | recompute all over next time. */ | |
8a50fdce | 8109 | type0->set_target_type (type); |
14f9c5c9 AS |
8110 | |
8111 | for (f = 0; f < nfields; f += 1) | |
8112 | { | |
940da03e | 8113 | struct type *field_type = type0->field (f).type (); |
4c4b4cd2 | 8114 | struct type *new_type; |
14f9c5c9 | 8115 | |
4c4b4cd2 | 8116 | if (is_dynamic_field (type0, f)) |
460efde1 JB |
8117 | { |
8118 | field_type = ada_check_typedef (field_type); | |
27710edb | 8119 | new_type = to_static_fixed_type (field_type->target_type ()); |
460efde1 | 8120 | } |
14f9c5c9 | 8121 | else |
dda83cd7 | 8122 | new_type = static_unwrap_type (field_type); |
9e195661 PMR |
8123 | |
8124 | if (new_type != field_type) | |
8125 | { | |
8126 | /* Clone TYPE0 only the first time we get a new field type. */ | |
8127 | if (type == type0) | |
8128 | { | |
8a50fdce SM |
8129 | type = alloc_type_copy (type0); |
8130 | type0->set_target_type (type); | |
78134374 | 8131 | type->set_code (type0->code ()); |
8ecb59f8 | 8132 | INIT_NONE_SPECIFIC (type); |
5e33d5f4 | 8133 | type->set_num_fields (nfields); |
3cabb6b0 SM |
8134 | |
8135 | field *fields = | |
8136 | ((struct field *) | |
8137 | TYPE_ALLOC (type, nfields * sizeof (struct field))); | |
80fc5e77 | 8138 | memcpy (fields, type0->fields (), |
9e195661 | 8139 | sizeof (struct field) * nfields); |
3cabb6b0 SM |
8140 | type->set_fields (fields); |
8141 | ||
d0e39ea2 | 8142 | type->set_name (ada_type_name (type0)); |
9cdd0d12 | 8143 | type->set_is_fixed_instance (true); |
b6cdbc9a | 8144 | type->set_length (0); |
9e195661 | 8145 | } |
5d14b6e5 | 8146 | type->field (f).set_type (new_type); |
33d16dd9 | 8147 | type->field (f).set_name (type0->field (f).name ()); |
9e195661 | 8148 | } |
14f9c5c9 | 8149 | } |
9e195661 | 8150 | |
14f9c5c9 AS |
8151 | return type; |
8152 | } | |
8153 | ||
4c4b4cd2 | 8154 | /* Given an object of type TYPE whose contents are at VALADDR and |
5823c3ef JB |
8155 | whose address in memory is ADDRESS, returns a revision of TYPE, |
8156 | which should be a non-dynamic-sized record, in which the variant | |
8157 | part, if any, is replaced with the appropriate branch. Looks | |
4c4b4cd2 PH |
8158 | for discriminant values in DVAL0, which can be NULL if the record |
8159 | contains the necessary discriminant values. */ | |
8160 | ||
d2e4a39e | 8161 | static struct type * |
fc1a4b47 | 8162 | to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8163 | CORE_ADDR address, struct value *dval0) |
14f9c5c9 | 8164 | { |
4c4b4cd2 | 8165 | struct value *dval; |
d2e4a39e | 8166 | struct type *rtype; |
14f9c5c9 | 8167 | struct type *branch_type; |
1f704f76 | 8168 | int nfields = type->num_fields (); |
4c4b4cd2 | 8169 | int variant_field = variant_field_index (type); |
14f9c5c9 | 8170 | |
4c4b4cd2 | 8171 | if (variant_field == -1) |
14f9c5c9 AS |
8172 | return type; |
8173 | ||
65558ca5 | 8174 | scoped_value_mark mark; |
4c4b4cd2 | 8175 | if (dval0 == NULL) |
9f1f738a SA |
8176 | { |
8177 | dval = value_from_contents_and_address (type, valaddr, address); | |
d0c97917 | 8178 | type = dval->type (); |
9f1f738a | 8179 | } |
4c4b4cd2 PH |
8180 | else |
8181 | dval = dval0; | |
8182 | ||
e9bb382b | 8183 | rtype = alloc_type_copy (type); |
67607e24 | 8184 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 8185 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 8186 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
8187 | |
8188 | field *fields = | |
d2e4a39e | 8189 | (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field)); |
80fc5e77 | 8190 | memcpy (fields, type->fields (), sizeof (struct field) * nfields); |
3cabb6b0 SM |
8191 | rtype->set_fields (fields); |
8192 | ||
d0e39ea2 | 8193 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 8194 | rtype->set_is_fixed_instance (true); |
df86565b | 8195 | rtype->set_length (type->length ()); |
14f9c5c9 | 8196 | |
4c4b4cd2 | 8197 | branch_type = to_fixed_variant_branch_type |
940da03e | 8198 | (type->field (variant_field).type (), |
d2e4a39e | 8199 | cond_offset_host (valaddr, |
b610c045 | 8200 | type->field (variant_field).loc_bitpos () |
dda83cd7 | 8201 | / TARGET_CHAR_BIT), |
d2e4a39e | 8202 | cond_offset_target (address, |
b610c045 | 8203 | type->field (variant_field).loc_bitpos () |
dda83cd7 | 8204 | / TARGET_CHAR_BIT), dval); |
d2e4a39e | 8205 | if (branch_type == NULL) |
14f9c5c9 | 8206 | { |
4c4b4cd2 | 8207 | int f; |
5b4ee69b | 8208 | |
4c4b4cd2 | 8209 | for (f = variant_field + 1; f < nfields; f += 1) |
dda83cd7 | 8210 | rtype->field (f - 1) = rtype->field (f); |
5e33d5f4 | 8211 | rtype->set_num_fields (rtype->num_fields () - 1); |
14f9c5c9 AS |
8212 | } |
8213 | else | |
8214 | { | |
5d14b6e5 | 8215 | rtype->field (variant_field).set_type (branch_type); |
d3fd12df | 8216 | rtype->field (variant_field).set_name ("S"); |
4c4b4cd2 | 8217 | TYPE_FIELD_BITSIZE (rtype, variant_field) = 0; |
df86565b | 8218 | rtype->set_length (rtype->length () + branch_type->length ()); |
14f9c5c9 | 8219 | } |
b6cdbc9a | 8220 | |
df86565b SM |
8221 | rtype->set_length (rtype->length () |
8222 | - type->field (variant_field).type ()->length ()); | |
d2e4a39e | 8223 | |
14f9c5c9 AS |
8224 | return rtype; |
8225 | } | |
8226 | ||
8227 | /* An ordinary record type (with fixed-length fields) that describes | |
8228 | the value at (TYPE0, VALADDR, ADDRESS) [see explanation at | |
8229 | beginning of this section]. Any necessary discriminants' values | |
4c4b4cd2 PH |
8230 | should be in DVAL, a record value; it may be NULL if the object |
8231 | at ADDR itself contains any necessary discriminant values. | |
8232 | Additionally, VALADDR and ADDRESS may also be NULL if no discriminant | |
8233 | values from the record are needed. Except in the case that DVAL, | |
8234 | VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless | |
8235 | unchecked) is replaced by a particular branch of the variant. | |
8236 | ||
8237 | NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0 | |
8238 | is questionable and may be removed. It can arise during the | |
8239 | processing of an unconstrained-array-of-record type where all the | |
8240 | variant branches have exactly the same size. This is because in | |
8241 | such cases, the compiler does not bother to use the XVS convention | |
8242 | when encoding the record. I am currently dubious of this | |
8243 | shortcut and suspect the compiler should be altered. FIXME. */ | |
14f9c5c9 | 8244 | |
d2e4a39e | 8245 | static struct type * |
fc1a4b47 | 8246 | to_fixed_record_type (struct type *type0, const gdb_byte *valaddr, |
dda83cd7 | 8247 | CORE_ADDR address, struct value *dval) |
14f9c5c9 | 8248 | { |
d2e4a39e | 8249 | struct type *templ_type; |
14f9c5c9 | 8250 | |
22c4c60c | 8251 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8252 | return type0; |
8253 | ||
d2e4a39e | 8254 | templ_type = dynamic_template_type (type0); |
14f9c5c9 AS |
8255 | |
8256 | if (templ_type != NULL) | |
8257 | return template_to_fixed_record_type (templ_type, valaddr, address, dval); | |
4c4b4cd2 PH |
8258 | else if (variant_field_index (type0) >= 0) |
8259 | { | |
8260 | if (dval == NULL && valaddr == NULL && address == 0) | |
dda83cd7 | 8261 | return type0; |
4c4b4cd2 | 8262 | return to_record_with_fixed_variant_part (type0, valaddr, address, |
dda83cd7 | 8263 | dval); |
4c4b4cd2 | 8264 | } |
14f9c5c9 AS |
8265 | else |
8266 | { | |
9cdd0d12 | 8267 | type0->set_is_fixed_instance (true); |
14f9c5c9 AS |
8268 | return type0; |
8269 | } | |
8270 | ||
8271 | } | |
8272 | ||
8273 | /* An ordinary record type (with fixed-length fields) that describes | |
8274 | the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a | |
8275 | union type. Any necessary discriminants' values should be in DVAL, | |
8276 | a record value. That is, this routine selects the appropriate | |
8277 | branch of the union at ADDR according to the discriminant value | |
b1f33ddd | 8278 | indicated in the union's type name. Returns VAR_TYPE0 itself if |
0963b4bd | 8279 | it represents a variant subject to a pragma Unchecked_Union. */ |
14f9c5c9 | 8280 | |
d2e4a39e | 8281 | static struct type * |
fc1a4b47 | 8282 | to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr, |
dda83cd7 | 8283 | CORE_ADDR address, struct value *dval) |
14f9c5c9 AS |
8284 | { |
8285 | int which; | |
d2e4a39e AS |
8286 | struct type *templ_type; |
8287 | struct type *var_type; | |
14f9c5c9 | 8288 | |
78134374 | 8289 | if (var_type0->code () == TYPE_CODE_PTR) |
27710edb | 8290 | var_type = var_type0->target_type (); |
d2e4a39e | 8291 | else |
14f9c5c9 AS |
8292 | var_type = var_type0; |
8293 | ||
8294 | templ_type = ada_find_parallel_type (var_type, "___XVU"); | |
8295 | ||
8296 | if (templ_type != NULL) | |
8297 | var_type = templ_type; | |
8298 | ||
d0c97917 | 8299 | if (is_unchecked_variant (var_type, dval->type ())) |
b1f33ddd | 8300 | return var_type0; |
d8af9068 | 8301 | which = ada_which_variant_applies (var_type, dval); |
14f9c5c9 AS |
8302 | |
8303 | if (which < 0) | |
e9bb382b | 8304 | return empty_record (var_type); |
14f9c5c9 | 8305 | else if (is_dynamic_field (var_type, which)) |
4c4b4cd2 | 8306 | return to_fixed_record_type |
27710edb | 8307 | (var_type->field (which).type ()->target_type(), valaddr, address, dval); |
940da03e | 8308 | else if (variant_field_index (var_type->field (which).type ()) >= 0) |
d2e4a39e AS |
8309 | return |
8310 | to_fixed_record_type | |
940da03e | 8311 | (var_type->field (which).type (), valaddr, address, dval); |
14f9c5c9 | 8312 | else |
940da03e | 8313 | return var_type->field (which).type (); |
14f9c5c9 AS |
8314 | } |
8315 | ||
8908fca5 JB |
8316 | /* Assuming RANGE_TYPE is a TYPE_CODE_RANGE, return nonzero if |
8317 | ENCODING_TYPE, a type following the GNAT conventions for discrete | |
8318 | type encodings, only carries redundant information. */ | |
8319 | ||
8320 | static int | |
8321 | ada_is_redundant_range_encoding (struct type *range_type, | |
8322 | struct type *encoding_type) | |
8323 | { | |
108d56a4 | 8324 | const char *bounds_str; |
8908fca5 JB |
8325 | int n; |
8326 | LONGEST lo, hi; | |
8327 | ||
78134374 | 8328 | gdb_assert (range_type->code () == TYPE_CODE_RANGE); |
8908fca5 | 8329 | |
78134374 SM |
8330 | if (get_base_type (range_type)->code () |
8331 | != get_base_type (encoding_type)->code ()) | |
005e2509 JB |
8332 | { |
8333 | /* The compiler probably used a simple base type to describe | |
8334 | the range type instead of the range's actual base type, | |
8335 | expecting us to get the real base type from the encoding | |
8336 | anyway. In this situation, the encoding cannot be ignored | |
8337 | as redundant. */ | |
8338 | return 0; | |
8339 | } | |
8340 | ||
8908fca5 JB |
8341 | if (is_dynamic_type (range_type)) |
8342 | return 0; | |
8343 | ||
7d93a1e0 | 8344 | if (encoding_type->name () == NULL) |
8908fca5 JB |
8345 | return 0; |
8346 | ||
7d93a1e0 | 8347 | bounds_str = strstr (encoding_type->name (), "___XDLU_"); |
8908fca5 JB |
8348 | if (bounds_str == NULL) |
8349 | return 0; | |
8350 | ||
8351 | n = 8; /* Skip "___XDLU_". */ | |
8352 | if (!ada_scan_number (bounds_str, n, &lo, &n)) | |
8353 | return 0; | |
5537ddd0 | 8354 | if (range_type->bounds ()->low.const_val () != lo) |
8908fca5 JB |
8355 | return 0; |
8356 | ||
8357 | n += 2; /* Skip the "__" separator between the two bounds. */ | |
8358 | if (!ada_scan_number (bounds_str, n, &hi, &n)) | |
8359 | return 0; | |
5537ddd0 | 8360 | if (range_type->bounds ()->high.const_val () != hi) |
8908fca5 JB |
8361 | return 0; |
8362 | ||
8363 | return 1; | |
8364 | } | |
8365 | ||
8366 | /* Given the array type ARRAY_TYPE, return nonzero if DESC_TYPE, | |
8367 | a type following the GNAT encoding for describing array type | |
8368 | indices, only carries redundant information. */ | |
8369 | ||
8370 | static int | |
8371 | ada_is_redundant_index_type_desc (struct type *array_type, | |
8372 | struct type *desc_type) | |
8373 | { | |
8374 | struct type *this_layer = check_typedef (array_type); | |
8375 | int i; | |
8376 | ||
1f704f76 | 8377 | for (i = 0; i < desc_type->num_fields (); i++) |
8908fca5 | 8378 | { |
3d967001 | 8379 | if (!ada_is_redundant_range_encoding (this_layer->index_type (), |
940da03e | 8380 | desc_type->field (i).type ())) |
8908fca5 | 8381 | return 0; |
27710edb | 8382 | this_layer = check_typedef (this_layer->target_type ()); |
8908fca5 JB |
8383 | } |
8384 | ||
8385 | return 1; | |
8386 | } | |
8387 | ||
14f9c5c9 AS |
8388 | /* Assuming that TYPE0 is an array type describing the type of a value |
8389 | at ADDR, and that DVAL describes a record containing any | |
8390 | discriminants used in TYPE0, returns a type for the value that | |
8391 | contains no dynamic components (that is, no components whose sizes | |
8392 | are determined by run-time quantities). Unless IGNORE_TOO_BIG is | |
8393 | true, gives an error message if the resulting type's size is over | |
4c4b4cd2 | 8394 | varsize_limit. */ |
14f9c5c9 | 8395 | |
d2e4a39e AS |
8396 | static struct type * |
8397 | to_fixed_array_type (struct type *type0, struct value *dval, | |
dda83cd7 | 8398 | int ignore_too_big) |
14f9c5c9 | 8399 | { |
d2e4a39e AS |
8400 | struct type *index_type_desc; |
8401 | struct type *result; | |
ad82864c | 8402 | int constrained_packed_array_p; |
931e5bc3 | 8403 | static const char *xa_suffix = "___XA"; |
14f9c5c9 | 8404 | |
b0dd7688 | 8405 | type0 = ada_check_typedef (type0); |
22c4c60c | 8406 | if (type0->is_fixed_instance ()) |
4c4b4cd2 | 8407 | return type0; |
14f9c5c9 | 8408 | |
ad82864c JB |
8409 | constrained_packed_array_p = ada_is_constrained_packed_array_type (type0); |
8410 | if (constrained_packed_array_p) | |
75fd6a26 TT |
8411 | { |
8412 | type0 = decode_constrained_packed_array_type (type0); | |
8413 | if (type0 == nullptr) | |
8414 | error (_("could not decode constrained packed array type")); | |
8415 | } | |
284614f0 | 8416 | |
931e5bc3 JG |
8417 | index_type_desc = ada_find_parallel_type (type0, xa_suffix); |
8418 | ||
8419 | /* As mentioned in exp_dbug.ads, for non bit-packed arrays an | |
8420 | encoding suffixed with 'P' may still be generated. If so, | |
8421 | it should be used to find the XA type. */ | |
8422 | ||
8423 | if (index_type_desc == NULL) | |
8424 | { | |
1da0522e | 8425 | const char *type_name = ada_type_name (type0); |
931e5bc3 | 8426 | |
1da0522e | 8427 | if (type_name != NULL) |
931e5bc3 | 8428 | { |
1da0522e | 8429 | const int len = strlen (type_name); |
931e5bc3 JG |
8430 | char *name = (char *) alloca (len + strlen (xa_suffix)); |
8431 | ||
1da0522e | 8432 | if (type_name[len - 1] == 'P') |
931e5bc3 | 8433 | { |
1da0522e | 8434 | strcpy (name, type_name); |
931e5bc3 JG |
8435 | strcpy (name + len - 1, xa_suffix); |
8436 | index_type_desc = ada_find_parallel_type_with_name (type0, name); | |
8437 | } | |
8438 | } | |
8439 | } | |
8440 | ||
28c85d6c | 8441 | ada_fixup_array_indexes_type (index_type_desc); |
8908fca5 JB |
8442 | if (index_type_desc != NULL |
8443 | && ada_is_redundant_index_type_desc (type0, index_type_desc)) | |
8444 | { | |
8445 | /* Ignore this ___XA parallel type, as it does not bring any | |
8446 | useful information. This allows us to avoid creating fixed | |
8447 | versions of the array's index types, which would be identical | |
8448 | to the original ones. This, in turn, can also help avoid | |
8449 | the creation of fixed versions of the array itself. */ | |
8450 | index_type_desc = NULL; | |
8451 | } | |
8452 | ||
14f9c5c9 AS |
8453 | if (index_type_desc == NULL) |
8454 | { | |
27710edb | 8455 | struct type *elt_type0 = ada_check_typedef (type0->target_type ()); |
5b4ee69b | 8456 | |
14f9c5c9 | 8457 | /* NOTE: elt_type---the fixed version of elt_type0---should never |
dda83cd7 SM |
8458 | depend on the contents of the array in properly constructed |
8459 | debugging data. */ | |
529cad9c | 8460 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8461 | We're not providing the address of an element here, |
8462 | and thus the actual object value cannot be inspected to do | |
8463 | the conversion. This should not be a problem, since arrays of | |
8464 | unconstrained objects are not allowed. In particular, all | |
8465 | the elements of an array of a tagged type should all be of | |
8466 | the same type specified in the debugging info. No need to | |
8467 | consult the object tag. */ | |
1ed6ede0 | 8468 | struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1); |
14f9c5c9 | 8469 | |
284614f0 JB |
8470 | /* Make sure we always create a new array type when dealing with |
8471 | packed array types, since we're going to fix-up the array | |
8472 | type length and element bitsize a little further down. */ | |
ad82864c | 8473 | if (elt_type0 == elt_type && !constrained_packed_array_p) |
dda83cd7 | 8474 | result = type0; |
14f9c5c9 | 8475 | else |
dda83cd7 SM |
8476 | result = create_array_type (alloc_type_copy (type0), |
8477 | elt_type, type0->index_type ()); | |
14f9c5c9 AS |
8478 | } |
8479 | else | |
8480 | { | |
8481 | int i; | |
8482 | struct type *elt_type0; | |
8483 | ||
8484 | elt_type0 = type0; | |
1f704f76 | 8485 | for (i = index_type_desc->num_fields (); i > 0; i -= 1) |
27710edb | 8486 | elt_type0 = elt_type0->target_type (); |
14f9c5c9 AS |
8487 | |
8488 | /* NOTE: result---the fixed version of elt_type0---should never | |
dda83cd7 SM |
8489 | depend on the contents of the array in properly constructed |
8490 | debugging data. */ | |
529cad9c | 8491 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8492 | We're not providing the address of an element here, |
8493 | and thus the actual object value cannot be inspected to do | |
8494 | the conversion. This should not be a problem, since arrays of | |
8495 | unconstrained objects are not allowed. In particular, all | |
8496 | the elements of an array of a tagged type should all be of | |
8497 | the same type specified in the debugging info. No need to | |
8498 | consult the object tag. */ | |
1ed6ede0 | 8499 | result = |
dda83cd7 | 8500 | ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1); |
1ce677a4 UW |
8501 | |
8502 | elt_type0 = type0; | |
1f704f76 | 8503 | for (i = index_type_desc->num_fields () - 1; i >= 0; i -= 1) |
dda83cd7 SM |
8504 | { |
8505 | struct type *range_type = | |
8506 | to_fixed_range_type (index_type_desc->field (i).type (), dval); | |
5b4ee69b | 8507 | |
dda83cd7 SM |
8508 | result = create_array_type (alloc_type_copy (elt_type0), |
8509 | result, range_type); | |
27710edb | 8510 | elt_type0 = elt_type0->target_type (); |
dda83cd7 | 8511 | } |
14f9c5c9 AS |
8512 | } |
8513 | ||
2e6fda7d JB |
8514 | /* We want to preserve the type name. This can be useful when |
8515 | trying to get the type name of a value that has already been | |
8516 | printed (for instance, if the user did "print VAR; whatis $". */ | |
7d93a1e0 | 8517 | result->set_name (type0->name ()); |
2e6fda7d | 8518 | |
ad82864c | 8519 | if (constrained_packed_array_p) |
284614f0 JB |
8520 | { |
8521 | /* So far, the resulting type has been created as if the original | |
8522 | type was a regular (non-packed) array type. As a result, the | |
8523 | bitsize of the array elements needs to be set again, and the array | |
8524 | length needs to be recomputed based on that bitsize. */ | |
df86565b | 8525 | int len = result->length () / result->target_type ()->length (); |
284614f0 JB |
8526 | int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0); |
8527 | ||
8528 | TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0); | |
b6cdbc9a | 8529 | result->set_length (len * elt_bitsize / HOST_CHAR_BIT); |
df86565b SM |
8530 | if (result->length () * HOST_CHAR_BIT < len * elt_bitsize) |
8531 | result->set_length (result->length () + 1); | |
284614f0 JB |
8532 | } |
8533 | ||
9cdd0d12 | 8534 | result->set_is_fixed_instance (true); |
14f9c5c9 | 8535 | return result; |
d2e4a39e | 8536 | } |
14f9c5c9 AS |
8537 | |
8538 | ||
8539 | /* A standard type (containing no dynamically sized components) | |
8540 | corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS) | |
8541 | DVAL describes a record containing any discriminants used in TYPE0, | |
4c4b4cd2 | 8542 | and may be NULL if there are none, or if the object of type TYPE at |
529cad9c PH |
8543 | ADDRESS or in VALADDR contains these discriminants. |
8544 | ||
1ed6ede0 JB |
8545 | If CHECK_TAG is not null, in the case of tagged types, this function |
8546 | attempts to locate the object's tag and use it to compute the actual | |
8547 | type. However, when ADDRESS is null, we cannot use it to determine the | |
8548 | location of the tag, and therefore compute the tagged type's actual type. | |
8549 | So we return the tagged type without consulting the tag. */ | |
529cad9c | 8550 | |
f192137b JB |
8551 | static struct type * |
8552 | ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8553 | CORE_ADDR address, struct value *dval, int check_tag) |
14f9c5c9 | 8554 | { |
61ee279c | 8555 | type = ada_check_typedef (type); |
8ecb59f8 TT |
8556 | |
8557 | /* Only un-fixed types need to be handled here. */ | |
8558 | if (!HAVE_GNAT_AUX_INFO (type)) | |
8559 | return type; | |
8560 | ||
78134374 | 8561 | switch (type->code ()) |
d2e4a39e AS |
8562 | { |
8563 | default: | |
14f9c5c9 | 8564 | return type; |
d2e4a39e | 8565 | case TYPE_CODE_STRUCT: |
4c4b4cd2 | 8566 | { |
dda83cd7 SM |
8567 | struct type *static_type = to_static_fixed_type (type); |
8568 | struct type *fixed_record_type = | |
8569 | to_fixed_record_type (type, valaddr, address, NULL); | |
8570 | ||
8571 | /* If STATIC_TYPE is a tagged type and we know the object's address, | |
8572 | then we can determine its tag, and compute the object's actual | |
8573 | type from there. Note that we have to use the fixed record | |
8574 | type (the parent part of the record may have dynamic fields | |
8575 | and the way the location of _tag is expressed may depend on | |
8576 | them). */ | |
8577 | ||
8578 | if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0)) | |
8579 | { | |
b50d69b5 JG |
8580 | struct value *tag = |
8581 | value_tag_from_contents_and_address | |
8582 | (fixed_record_type, | |
8583 | valaddr, | |
8584 | address); | |
8585 | struct type *real_type = type_from_tag (tag); | |
8586 | struct value *obj = | |
8587 | value_from_contents_and_address (fixed_record_type, | |
8588 | valaddr, | |
8589 | address); | |
d0c97917 | 8590 | fixed_record_type = obj->type (); |
dda83cd7 SM |
8591 | if (real_type != NULL) |
8592 | return to_fixed_record_type | |
b50d69b5 | 8593 | (real_type, NULL, |
9feb2d07 | 8594 | ada_tag_value_at_base_address (obj)->address (), NULL); |
dda83cd7 SM |
8595 | } |
8596 | ||
8597 | /* Check to see if there is a parallel ___XVZ variable. | |
8598 | If there is, then it provides the actual size of our type. */ | |
8599 | else if (ada_type_name (fixed_record_type) != NULL) | |
8600 | { | |
8601 | const char *name = ada_type_name (fixed_record_type); | |
8602 | char *xvz_name | |
224c3ddb | 8603 | = (char *) alloca (strlen (name) + 7 /* "___XVZ\0" */); |
eccab96d | 8604 | bool xvz_found = false; |
dda83cd7 | 8605 | LONGEST size; |
4af88198 | 8606 | |
dda83cd7 | 8607 | xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name); |
a70b8144 | 8608 | try |
eccab96d JB |
8609 | { |
8610 | xvz_found = get_int_var_value (xvz_name, size); | |
8611 | } | |
230d2906 | 8612 | catch (const gdb_exception_error &except) |
eccab96d JB |
8613 | { |
8614 | /* We found the variable, but somehow failed to read | |
8615 | its value. Rethrow the same error, but with a little | |
8616 | bit more information, to help the user understand | |
8617 | what went wrong (Eg: the variable might have been | |
8618 | optimized out). */ | |
8619 | throw_error (except.error, | |
8620 | _("unable to read value of %s (%s)"), | |
3d6e9d23 | 8621 | xvz_name, except.what ()); |
eccab96d | 8622 | } |
eccab96d | 8623 | |
df86565b | 8624 | if (xvz_found && fixed_record_type->length () != size) |
dda83cd7 SM |
8625 | { |
8626 | fixed_record_type = copy_type (fixed_record_type); | |
b6cdbc9a | 8627 | fixed_record_type->set_length (size); |
dda83cd7 SM |
8628 | |
8629 | /* The FIXED_RECORD_TYPE may have be a stub. We have | |
8630 | observed this when the debugging info is STABS, and | |
8631 | apparently it is something that is hard to fix. | |
8632 | ||
8633 | In practice, we don't need the actual type definition | |
8634 | at all, because the presence of the XVZ variable allows us | |
8635 | to assume that there must be a XVS type as well, which we | |
8636 | should be able to use later, when we need the actual type | |
8637 | definition. | |
8638 | ||
8639 | In the meantime, pretend that the "fixed" type we are | |
8640 | returning is NOT a stub, because this can cause trouble | |
8641 | when using this type to create new types targeting it. | |
8642 | Indeed, the associated creation routines often check | |
8643 | whether the target type is a stub and will try to replace | |
8644 | it, thus using a type with the wrong size. This, in turn, | |
8645 | might cause the new type to have the wrong size too. | |
8646 | Consider the case of an array, for instance, where the size | |
8647 | of the array is computed from the number of elements in | |
8648 | our array multiplied by the size of its element. */ | |
b4b73759 | 8649 | fixed_record_type->set_is_stub (false); |
dda83cd7 SM |
8650 | } |
8651 | } | |
8652 | return fixed_record_type; | |
4c4b4cd2 | 8653 | } |
d2e4a39e | 8654 | case TYPE_CODE_ARRAY: |
4c4b4cd2 | 8655 | return to_fixed_array_type (type, dval, 1); |
d2e4a39e AS |
8656 | case TYPE_CODE_UNION: |
8657 | if (dval == NULL) | |
dda83cd7 | 8658 | return type; |
d2e4a39e | 8659 | else |
dda83cd7 | 8660 | return to_fixed_variant_branch_type (type, valaddr, address, dval); |
d2e4a39e | 8661 | } |
14f9c5c9 AS |
8662 | } |
8663 | ||
f192137b JB |
8664 | /* The same as ada_to_fixed_type_1, except that it preserves the type |
8665 | if it is a TYPE_CODE_TYPEDEF of a type that is already fixed. | |
96dbd2c1 JB |
8666 | |
8667 | The typedef layer needs be preserved in order to differentiate between | |
8668 | arrays and array pointers when both types are implemented using the same | |
8669 | fat pointer. In the array pointer case, the pointer is encoded as | |
8670 | a typedef of the pointer type. For instance, considering: | |
8671 | ||
8672 | type String_Access is access String; | |
8673 | S1 : String_Access := null; | |
8674 | ||
8675 | To the debugger, S1 is defined as a typedef of type String. But | |
8676 | to the user, it is a pointer. So if the user tries to print S1, | |
8677 | we should not dereference the array, but print the array address | |
8678 | instead. | |
8679 | ||
8680 | If we didn't preserve the typedef layer, we would lose the fact that | |
8681 | the type is to be presented as a pointer (needs de-reference before | |
8682 | being printed). And we would also use the source-level type name. */ | |
f192137b JB |
8683 | |
8684 | struct type * | |
8685 | ada_to_fixed_type (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8686 | CORE_ADDR address, struct value *dval, int check_tag) |
f192137b JB |
8687 | |
8688 | { | |
8689 | struct type *fixed_type = | |
8690 | ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag); | |
8691 | ||
96dbd2c1 JB |
8692 | /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE, |
8693 | then preserve the typedef layer. | |
8694 | ||
8695 | Implementation note: We can only check the main-type portion of | |
8696 | the TYPE and FIXED_TYPE, because eliminating the typedef layer | |
8697 | from TYPE now returns a type that has the same instance flags | |
8698 | as TYPE. For instance, if TYPE is a "typedef const", and its | |
8699 | target type is a "struct", then the typedef elimination will return | |
8700 | a "const" version of the target type. See check_typedef for more | |
8701 | details about how the typedef layer elimination is done. | |
8702 | ||
8703 | brobecker/2010-11-19: It seems to me that the only case where it is | |
8704 | useful to preserve the typedef layer is when dealing with fat pointers. | |
8705 | Perhaps, we could add a check for that and preserve the typedef layer | |
85102364 | 8706 | only in that situation. But this seems unnecessary so far, probably |
96dbd2c1 JB |
8707 | because we call check_typedef/ada_check_typedef pretty much everywhere. |
8708 | */ | |
78134374 | 8709 | if (type->code () == TYPE_CODE_TYPEDEF |
720d1a40 | 8710 | && (TYPE_MAIN_TYPE (ada_typedef_target_type (type)) |
96dbd2c1 | 8711 | == TYPE_MAIN_TYPE (fixed_type))) |
f192137b JB |
8712 | return type; |
8713 | ||
8714 | return fixed_type; | |
8715 | } | |
8716 | ||
14f9c5c9 | 8717 | /* A standard (static-sized) type corresponding as well as possible to |
4c4b4cd2 | 8718 | TYPE0, but based on no runtime data. */ |
14f9c5c9 | 8719 | |
d2e4a39e AS |
8720 | static struct type * |
8721 | to_static_fixed_type (struct type *type0) | |
14f9c5c9 | 8722 | { |
d2e4a39e | 8723 | struct type *type; |
14f9c5c9 AS |
8724 | |
8725 | if (type0 == NULL) | |
8726 | return NULL; | |
8727 | ||
22c4c60c | 8728 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8729 | return type0; |
8730 | ||
61ee279c | 8731 | type0 = ada_check_typedef (type0); |
d2e4a39e | 8732 | |
78134374 | 8733 | switch (type0->code ()) |
14f9c5c9 AS |
8734 | { |
8735 | default: | |
8736 | return type0; | |
8737 | case TYPE_CODE_STRUCT: | |
8738 | type = dynamic_template_type (type0); | |
d2e4a39e | 8739 | if (type != NULL) |
dda83cd7 | 8740 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8741 | else |
dda83cd7 | 8742 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8743 | case TYPE_CODE_UNION: |
8744 | type = ada_find_parallel_type (type0, "___XVU"); | |
8745 | if (type != NULL) | |
dda83cd7 | 8746 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8747 | else |
dda83cd7 | 8748 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8749 | } |
8750 | } | |
8751 | ||
4c4b4cd2 PH |
8752 | /* A static approximation of TYPE with all type wrappers removed. */ |
8753 | ||
d2e4a39e AS |
8754 | static struct type * |
8755 | static_unwrap_type (struct type *type) | |
14f9c5c9 AS |
8756 | { |
8757 | if (ada_is_aligner_type (type)) | |
8758 | { | |
940da03e | 8759 | struct type *type1 = ada_check_typedef (type)->field (0).type (); |
14f9c5c9 | 8760 | if (ada_type_name (type1) == NULL) |
d0e39ea2 | 8761 | type1->set_name (ada_type_name (type)); |
14f9c5c9 AS |
8762 | |
8763 | return static_unwrap_type (type1); | |
8764 | } | |
d2e4a39e | 8765 | else |
14f9c5c9 | 8766 | { |
d2e4a39e | 8767 | struct type *raw_real_type = ada_get_base_type (type); |
5b4ee69b | 8768 | |
d2e4a39e | 8769 | if (raw_real_type == type) |
dda83cd7 | 8770 | return type; |
14f9c5c9 | 8771 | else |
dda83cd7 | 8772 | return to_static_fixed_type (raw_real_type); |
14f9c5c9 AS |
8773 | } |
8774 | } | |
8775 | ||
8776 | /* In some cases, incomplete and private types require | |
4c4b4cd2 | 8777 | cross-references that are not resolved as records (for example, |
14f9c5c9 AS |
8778 | type Foo; |
8779 | type FooP is access Foo; | |
8780 | V: FooP; | |
8781 | type Foo is array ...; | |
4c4b4cd2 | 8782 | ). In these cases, since there is no mechanism for producing |
14f9c5c9 AS |
8783 | cross-references to such types, we instead substitute for FooP a |
8784 | stub enumeration type that is nowhere resolved, and whose tag is | |
4c4b4cd2 | 8785 | the name of the actual type. Call these types "non-record stubs". */ |
14f9c5c9 AS |
8786 | |
8787 | /* A type equivalent to TYPE that is not a non-record stub, if one | |
4c4b4cd2 PH |
8788 | exists, otherwise TYPE. */ |
8789 | ||
d2e4a39e | 8790 | struct type * |
61ee279c | 8791 | ada_check_typedef (struct type *type) |
14f9c5c9 | 8792 | { |
727e3d2e JB |
8793 | if (type == NULL) |
8794 | return NULL; | |
8795 | ||
736ade86 XR |
8796 | /* If our type is an access to an unconstrained array, which is encoded |
8797 | as a TYPE_CODE_TYPEDEF of a fat pointer, then we're done. | |
720d1a40 JB |
8798 | We don't want to strip the TYPE_CODE_TYPDEF layer, because this is |
8799 | what allows us to distinguish between fat pointers that represent | |
8800 | array types, and fat pointers that represent array access types | |
8801 | (in both cases, the compiler implements them as fat pointers). */ | |
736ade86 | 8802 | if (ada_is_access_to_unconstrained_array (type)) |
720d1a40 JB |
8803 | return type; |
8804 | ||
f168693b | 8805 | type = check_typedef (type); |
78134374 | 8806 | if (type == NULL || type->code () != TYPE_CODE_ENUM |
e46d3488 | 8807 | || !type->is_stub () |
7d93a1e0 | 8808 | || type->name () == NULL) |
14f9c5c9 | 8809 | return type; |
d2e4a39e | 8810 | else |
14f9c5c9 | 8811 | { |
7d93a1e0 | 8812 | const char *name = type->name (); |
d2e4a39e | 8813 | struct type *type1 = ada_find_any_type (name); |
5b4ee69b | 8814 | |
05e522ef | 8815 | if (type1 == NULL) |
dda83cd7 | 8816 | return type; |
05e522ef JB |
8817 | |
8818 | /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with | |
8819 | stubs pointing to arrays, as we don't create symbols for array | |
3a867c22 JB |
8820 | types, only for the typedef-to-array types). If that's the case, |
8821 | strip the typedef layer. */ | |
78134374 | 8822 | if (type1->code () == TYPE_CODE_TYPEDEF) |
3a867c22 JB |
8823 | type1 = ada_check_typedef (type1); |
8824 | ||
8825 | return type1; | |
14f9c5c9 AS |
8826 | } |
8827 | } | |
8828 | ||
8829 | /* A value representing the data at VALADDR/ADDRESS as described by | |
8830 | type TYPE0, but with a standard (static-sized) type that correctly | |
8831 | describes it. If VAL0 is not NULL and TYPE0 already is a standard | |
8832 | type, then return VAL0 [this feature is simply to avoid redundant | |
4c4b4cd2 | 8833 | creation of struct values]. */ |
14f9c5c9 | 8834 | |
4c4b4cd2 PH |
8835 | static struct value * |
8836 | ada_to_fixed_value_create (struct type *type0, CORE_ADDR address, | |
dda83cd7 | 8837 | struct value *val0) |
14f9c5c9 | 8838 | { |
1ed6ede0 | 8839 | struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1); |
5b4ee69b | 8840 | |
14f9c5c9 AS |
8841 | if (type == type0 && val0 != NULL) |
8842 | return val0; | |
cc0e770c JB |
8843 | |
8844 | if (VALUE_LVAL (val0) != lval_memory) | |
8845 | { | |
8846 | /* Our value does not live in memory; it could be a convenience | |
8847 | variable, for instance. Create a not_lval value using val0's | |
8848 | contents. */ | |
50888e42 | 8849 | return value_from_contents (type, value_contents (val0).data ()); |
cc0e770c JB |
8850 | } |
8851 | ||
8852 | return value_from_contents_and_address (type, 0, address); | |
4c4b4cd2 PH |
8853 | } |
8854 | ||
8855 | /* A value representing VAL, but with a standard (static-sized) type | |
8856 | that correctly describes it. Does not necessarily create a new | |
8857 | value. */ | |
8858 | ||
0c3acc09 | 8859 | struct value * |
4c4b4cd2 PH |
8860 | ada_to_fixed_value (struct value *val) |
8861 | { | |
c48db5ca | 8862 | val = unwrap_value (val); |
9feb2d07 | 8863 | val = ada_to_fixed_value_create (val->type (), val->address (), val); |
c48db5ca | 8864 | return val; |
14f9c5c9 | 8865 | } |
d2e4a39e | 8866 | \f |
14f9c5c9 | 8867 | |
14f9c5c9 AS |
8868 | /* Attributes */ |
8869 | ||
4c4b4cd2 PH |
8870 | /* Table mapping attribute numbers to names. |
8871 | NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */ | |
14f9c5c9 | 8872 | |
27087b7f | 8873 | static const char * const attribute_names[] = { |
14f9c5c9 AS |
8874 | "<?>", |
8875 | ||
d2e4a39e | 8876 | "first", |
14f9c5c9 AS |
8877 | "last", |
8878 | "length", | |
8879 | "image", | |
14f9c5c9 AS |
8880 | "max", |
8881 | "min", | |
4c4b4cd2 PH |
8882 | "modulus", |
8883 | "pos", | |
8884 | "size", | |
8885 | "tag", | |
14f9c5c9 | 8886 | "val", |
14f9c5c9 AS |
8887 | 0 |
8888 | }; | |
8889 | ||
de93309a | 8890 | static const char * |
4c4b4cd2 | 8891 | ada_attribute_name (enum exp_opcode n) |
14f9c5c9 | 8892 | { |
4c4b4cd2 PH |
8893 | if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL) |
8894 | return attribute_names[n - OP_ATR_FIRST + 1]; | |
14f9c5c9 AS |
8895 | else |
8896 | return attribute_names[0]; | |
8897 | } | |
8898 | ||
4c4b4cd2 | 8899 | /* Evaluate the 'POS attribute applied to ARG. */ |
14f9c5c9 | 8900 | |
4c4b4cd2 PH |
8901 | static LONGEST |
8902 | pos_atr (struct value *arg) | |
14f9c5c9 | 8903 | { |
24209737 | 8904 | struct value *val = coerce_ref (arg); |
d0c97917 | 8905 | struct type *type = val->type (); |
14f9c5c9 | 8906 | |
d2e4a39e | 8907 | if (!discrete_type_p (type)) |
323e0a4a | 8908 | error (_("'POS only defined on discrete types")); |
14f9c5c9 | 8909 | |
6244c119 SM |
8910 | gdb::optional<LONGEST> result = discrete_position (type, value_as_long (val)); |
8911 | if (!result.has_value ()) | |
aa715135 | 8912 | error (_("enumeration value is invalid: can't find 'POS")); |
14f9c5c9 | 8913 | |
6244c119 | 8914 | return *result; |
4c4b4cd2 PH |
8915 | } |
8916 | ||
7631cf6c | 8917 | struct value * |
7992accc TT |
8918 | ada_pos_atr (struct type *expect_type, |
8919 | struct expression *exp, | |
8920 | enum noside noside, enum exp_opcode op, | |
8921 | struct value *arg) | |
4c4b4cd2 | 8922 | { |
7992accc TT |
8923 | struct type *type = builtin_type (exp->gdbarch)->builtin_int; |
8924 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
8925 | return value_zero (type, not_lval); | |
3cb382c9 | 8926 | return value_from_longest (type, pos_atr (arg)); |
14f9c5c9 AS |
8927 | } |
8928 | ||
4c4b4cd2 | 8929 | /* Evaluate the TYPE'VAL attribute applied to ARG. */ |
14f9c5c9 | 8930 | |
d2e4a39e | 8931 | static struct value * |
53a47a3e | 8932 | val_atr (struct type *type, LONGEST val) |
14f9c5c9 | 8933 | { |
53a47a3e | 8934 | gdb_assert (discrete_type_p (type)); |
0bc2354b | 8935 | if (type->code () == TYPE_CODE_RANGE) |
27710edb | 8936 | type = type->target_type (); |
78134374 | 8937 | if (type->code () == TYPE_CODE_ENUM) |
14f9c5c9 | 8938 | { |
53a47a3e | 8939 | if (val < 0 || val >= type->num_fields ()) |
dda83cd7 | 8940 | error (_("argument to 'VAL out of range")); |
970db518 | 8941 | val = type->field (val).loc_enumval (); |
14f9c5c9 | 8942 | } |
53a47a3e TT |
8943 | return value_from_longest (type, val); |
8944 | } | |
8945 | ||
9e99f48f | 8946 | struct value * |
3848abd6 | 8947 | ada_val_atr (enum noside noside, struct type *type, struct value *arg) |
53a47a3e | 8948 | { |
3848abd6 TT |
8949 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
8950 | return value_zero (type, not_lval); | |
8951 | ||
53a47a3e TT |
8952 | if (!discrete_type_p (type)) |
8953 | error (_("'VAL only defined on discrete types")); | |
d0c97917 | 8954 | if (!integer_type_p (arg->type ())) |
53a47a3e TT |
8955 | error (_("'VAL requires integral argument")); |
8956 | ||
8957 | return val_atr (type, value_as_long (arg)); | |
14f9c5c9 | 8958 | } |
14f9c5c9 | 8959 | \f |
d2e4a39e | 8960 | |
dda83cd7 | 8961 | /* Evaluation */ |
14f9c5c9 | 8962 | |
4c4b4cd2 PH |
8963 | /* True if TYPE appears to be an Ada character type. |
8964 | [At the moment, this is true only for Character and Wide_Character; | |
8965 | It is a heuristic test that could stand improvement]. */ | |
14f9c5c9 | 8966 | |
fc913e53 | 8967 | bool |
d2e4a39e | 8968 | ada_is_character_type (struct type *type) |
14f9c5c9 | 8969 | { |
7b9f71f2 JB |
8970 | const char *name; |
8971 | ||
8972 | /* If the type code says it's a character, then assume it really is, | |
8973 | and don't check any further. */ | |
78134374 | 8974 | if (type->code () == TYPE_CODE_CHAR) |
fc913e53 | 8975 | return true; |
7b9f71f2 JB |
8976 | |
8977 | /* Otherwise, assume it's a character type iff it is a discrete type | |
8978 | with a known character type name. */ | |
8979 | name = ada_type_name (type); | |
8980 | return (name != NULL | |
dda83cd7 SM |
8981 | && (type->code () == TYPE_CODE_INT |
8982 | || type->code () == TYPE_CODE_RANGE) | |
8983 | && (strcmp (name, "character") == 0 | |
8984 | || strcmp (name, "wide_character") == 0 | |
8985 | || strcmp (name, "wide_wide_character") == 0 | |
8986 | || strcmp (name, "unsigned char") == 0)); | |
14f9c5c9 AS |
8987 | } |
8988 | ||
4c4b4cd2 | 8989 | /* True if TYPE appears to be an Ada string type. */ |
14f9c5c9 | 8990 | |
fc913e53 | 8991 | bool |
ebf56fd3 | 8992 | ada_is_string_type (struct type *type) |
14f9c5c9 | 8993 | { |
61ee279c | 8994 | type = ada_check_typedef (type); |
d2e4a39e | 8995 | if (type != NULL |
78134374 | 8996 | && type->code () != TYPE_CODE_PTR |
76a01679 | 8997 | && (ada_is_simple_array_type (type) |
dda83cd7 | 8998 | || ada_is_array_descriptor_type (type)) |
14f9c5c9 AS |
8999 | && ada_array_arity (type) == 1) |
9000 | { | |
9001 | struct type *elttype = ada_array_element_type (type, 1); | |
9002 | ||
9003 | return ada_is_character_type (elttype); | |
9004 | } | |
d2e4a39e | 9005 | else |
fc913e53 | 9006 | return false; |
14f9c5c9 AS |
9007 | } |
9008 | ||
5bf03f13 JB |
9009 | /* The compiler sometimes provides a parallel XVS type for a given |
9010 | PAD type. Normally, it is safe to follow the PAD type directly, | |
9011 | but older versions of the compiler have a bug that causes the offset | |
9012 | of its "F" field to be wrong. Following that field in that case | |
9013 | would lead to incorrect results, but this can be worked around | |
9014 | by ignoring the PAD type and using the associated XVS type instead. | |
9015 | ||
9016 | Set to True if the debugger should trust the contents of PAD types. | |
9017 | Otherwise, ignore the PAD type if there is a parallel XVS type. */ | |
491144b5 | 9018 | static bool trust_pad_over_xvs = true; |
14f9c5c9 AS |
9019 | |
9020 | /* True if TYPE is a struct type introduced by the compiler to force the | |
9021 | alignment of a value. Such types have a single field with a | |
4c4b4cd2 | 9022 | distinctive name. */ |
14f9c5c9 AS |
9023 | |
9024 | int | |
ebf56fd3 | 9025 | ada_is_aligner_type (struct type *type) |
14f9c5c9 | 9026 | { |
61ee279c | 9027 | type = ada_check_typedef (type); |
714e53ab | 9028 | |
5bf03f13 | 9029 | if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL) |
714e53ab PH |
9030 | return 0; |
9031 | ||
78134374 | 9032 | return (type->code () == TYPE_CODE_STRUCT |
dda83cd7 | 9033 | && type->num_fields () == 1 |
33d16dd9 | 9034 | && strcmp (type->field (0).name (), "F") == 0); |
14f9c5c9 AS |
9035 | } |
9036 | ||
9037 | /* If there is an ___XVS-convention type parallel to SUBTYPE, return | |
4c4b4cd2 | 9038 | the parallel type. */ |
14f9c5c9 | 9039 | |
d2e4a39e AS |
9040 | struct type * |
9041 | ada_get_base_type (struct type *raw_type) | |
14f9c5c9 | 9042 | { |
d2e4a39e AS |
9043 | struct type *real_type_namer; |
9044 | struct type *raw_real_type; | |
14f9c5c9 | 9045 | |
78134374 | 9046 | if (raw_type == NULL || raw_type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
9047 | return raw_type; |
9048 | ||
284614f0 JB |
9049 | if (ada_is_aligner_type (raw_type)) |
9050 | /* The encoding specifies that we should always use the aligner type. | |
9051 | So, even if this aligner type has an associated XVS type, we should | |
9052 | simply ignore it. | |
9053 | ||
9054 | According to the compiler gurus, an XVS type parallel to an aligner | |
9055 | type may exist because of a stabs limitation. In stabs, aligner | |
9056 | types are empty because the field has a variable-sized type, and | |
9057 | thus cannot actually be used as an aligner type. As a result, | |
9058 | we need the associated parallel XVS type to decode the type. | |
9059 | Since the policy in the compiler is to not change the internal | |
9060 | representation based on the debugging info format, we sometimes | |
9061 | end up having a redundant XVS type parallel to the aligner type. */ | |
9062 | return raw_type; | |
9063 | ||
14f9c5c9 | 9064 | real_type_namer = ada_find_parallel_type (raw_type, "___XVS"); |
d2e4a39e | 9065 | if (real_type_namer == NULL |
78134374 | 9066 | || real_type_namer->code () != TYPE_CODE_STRUCT |
1f704f76 | 9067 | || real_type_namer->num_fields () != 1) |
14f9c5c9 AS |
9068 | return raw_type; |
9069 | ||
940da03e | 9070 | if (real_type_namer->field (0).type ()->code () != TYPE_CODE_REF) |
f80d3ff2 JB |
9071 | { |
9072 | /* This is an older encoding form where the base type needs to be | |
85102364 | 9073 | looked up by name. We prefer the newer encoding because it is |
f80d3ff2 | 9074 | more efficient. */ |
33d16dd9 | 9075 | raw_real_type = ada_find_any_type (real_type_namer->field (0).name ()); |
f80d3ff2 JB |
9076 | if (raw_real_type == NULL) |
9077 | return raw_type; | |
9078 | else | |
9079 | return raw_real_type; | |
9080 | } | |
9081 | ||
9082 | /* The field in our XVS type is a reference to the base type. */ | |
27710edb | 9083 | return real_type_namer->field (0).type ()->target_type (); |
d2e4a39e | 9084 | } |
14f9c5c9 | 9085 | |
4c4b4cd2 | 9086 | /* The type of value designated by TYPE, with all aligners removed. */ |
14f9c5c9 | 9087 | |
d2e4a39e AS |
9088 | struct type * |
9089 | ada_aligned_type (struct type *type) | |
14f9c5c9 AS |
9090 | { |
9091 | if (ada_is_aligner_type (type)) | |
940da03e | 9092 | return ada_aligned_type (type->field (0).type ()); |
14f9c5c9 AS |
9093 | else |
9094 | return ada_get_base_type (type); | |
9095 | } | |
9096 | ||
9097 | ||
9098 | /* The address of the aligned value in an object at address VALADDR | |
4c4b4cd2 | 9099 | having type TYPE. Assumes ada_is_aligner_type (TYPE). */ |
14f9c5c9 | 9100 | |
fc1a4b47 AC |
9101 | const gdb_byte * |
9102 | ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr) | |
14f9c5c9 | 9103 | { |
d2e4a39e | 9104 | if (ada_is_aligner_type (type)) |
b610c045 SM |
9105 | return ada_aligned_value_addr |
9106 | (type->field (0).type (), | |
9107 | valaddr + type->field (0).loc_bitpos () / TARGET_CHAR_BIT); | |
14f9c5c9 AS |
9108 | else |
9109 | return valaddr; | |
9110 | } | |
9111 | ||
4c4b4cd2 PH |
9112 | |
9113 | ||
14f9c5c9 | 9114 | /* The printed representation of an enumeration literal with encoded |
4c4b4cd2 | 9115 | name NAME. The value is good to the next call of ada_enum_name. */ |
d2e4a39e AS |
9116 | const char * |
9117 | ada_enum_name (const char *name) | |
14f9c5c9 | 9118 | { |
5f9febe0 | 9119 | static std::string storage; |
e6a959d6 | 9120 | const char *tmp; |
14f9c5c9 | 9121 | |
4c4b4cd2 PH |
9122 | /* First, unqualify the enumeration name: |
9123 | 1. Search for the last '.' character. If we find one, then skip | |
177b42fe | 9124 | all the preceding characters, the unqualified name starts |
76a01679 | 9125 | right after that dot. |
4c4b4cd2 | 9126 | 2. Otherwise, we may be debugging on a target where the compiler |
76a01679 JB |
9127 | translates dots into "__". Search forward for double underscores, |
9128 | but stop searching when we hit an overloading suffix, which is | |
9129 | of the form "__" followed by digits. */ | |
4c4b4cd2 | 9130 | |
c3e5cd34 PH |
9131 | tmp = strrchr (name, '.'); |
9132 | if (tmp != NULL) | |
4c4b4cd2 PH |
9133 | name = tmp + 1; |
9134 | else | |
14f9c5c9 | 9135 | { |
4c4b4cd2 | 9136 | while ((tmp = strstr (name, "__")) != NULL) |
dda83cd7 SM |
9137 | { |
9138 | if (isdigit (tmp[2])) | |
9139 | break; | |
9140 | else | |
9141 | name = tmp + 2; | |
9142 | } | |
14f9c5c9 AS |
9143 | } |
9144 | ||
9145 | if (name[0] == 'Q') | |
9146 | { | |
14f9c5c9 | 9147 | int v; |
5b4ee69b | 9148 | |
14f9c5c9 | 9149 | if (name[1] == 'U' || name[1] == 'W') |
dda83cd7 | 9150 | { |
a7041de8 TT |
9151 | int offset = 2; |
9152 | if (name[1] == 'W' && name[2] == 'W') | |
9153 | { | |
9154 | /* Also handle the QWW case. */ | |
9155 | ++offset; | |
9156 | } | |
9157 | if (sscanf (name + offset, "%x", &v) != 1) | |
dda83cd7 SM |
9158 | return name; |
9159 | } | |
272560b5 TT |
9160 | else if (((name[1] >= '0' && name[1] <= '9') |
9161 | || (name[1] >= 'a' && name[1] <= 'z')) | |
9162 | && name[2] == '\0') | |
9163 | { | |
5f9febe0 TT |
9164 | storage = string_printf ("'%c'", name[1]); |
9165 | return storage.c_str (); | |
272560b5 | 9166 | } |
14f9c5c9 | 9167 | else |
dda83cd7 | 9168 | return name; |
14f9c5c9 AS |
9169 | |
9170 | if (isascii (v) && isprint (v)) | |
5f9febe0 | 9171 | storage = string_printf ("'%c'", v); |
14f9c5c9 | 9172 | else if (name[1] == 'U') |
a7041de8 TT |
9173 | storage = string_printf ("'[\"%02x\"]'", v); |
9174 | else if (name[2] != 'W') | |
9175 | storage = string_printf ("'[\"%04x\"]'", v); | |
14f9c5c9 | 9176 | else |
a7041de8 | 9177 | storage = string_printf ("'[\"%06x\"]'", v); |
14f9c5c9 | 9178 | |
5f9febe0 | 9179 | return storage.c_str (); |
14f9c5c9 | 9180 | } |
d2e4a39e | 9181 | else |
4c4b4cd2 | 9182 | { |
c3e5cd34 PH |
9183 | tmp = strstr (name, "__"); |
9184 | if (tmp == NULL) | |
9185 | tmp = strstr (name, "$"); | |
9186 | if (tmp != NULL) | |
dda83cd7 | 9187 | { |
5f9febe0 TT |
9188 | storage = std::string (name, tmp - name); |
9189 | return storage.c_str (); | |
dda83cd7 | 9190 | } |
4c4b4cd2 PH |
9191 | |
9192 | return name; | |
9193 | } | |
14f9c5c9 AS |
9194 | } |
9195 | ||
14f9c5c9 | 9196 | /* If VAL is wrapped in an aligner or subtype wrapper, return the |
4c4b4cd2 | 9197 | value it wraps. */ |
14f9c5c9 | 9198 | |
d2e4a39e AS |
9199 | static struct value * |
9200 | unwrap_value (struct value *val) | |
14f9c5c9 | 9201 | { |
d0c97917 | 9202 | struct type *type = ada_check_typedef (val->type ()); |
5b4ee69b | 9203 | |
14f9c5c9 AS |
9204 | if (ada_is_aligner_type (type)) |
9205 | { | |
de4d072f | 9206 | struct value *v = ada_value_struct_elt (val, "F", 0); |
d0c97917 | 9207 | struct type *val_type = ada_check_typedef (v->type ()); |
5b4ee69b | 9208 | |
14f9c5c9 | 9209 | if (ada_type_name (val_type) == NULL) |
d0e39ea2 | 9210 | val_type->set_name (ada_type_name (type)); |
14f9c5c9 AS |
9211 | |
9212 | return unwrap_value (v); | |
9213 | } | |
d2e4a39e | 9214 | else |
14f9c5c9 | 9215 | { |
d2e4a39e | 9216 | struct type *raw_real_type = |
dda83cd7 | 9217 | ada_check_typedef (ada_get_base_type (type)); |
d2e4a39e | 9218 | |
5bf03f13 JB |
9219 | /* If there is no parallel XVS or XVE type, then the value is |
9220 | already unwrapped. Return it without further modification. */ | |
9221 | if ((type == raw_real_type) | |
9222 | && ada_find_parallel_type (type, "___XVE") == NULL) | |
9223 | return val; | |
14f9c5c9 | 9224 | |
d2e4a39e | 9225 | return |
dda83cd7 SM |
9226 | coerce_unspec_val_to_type |
9227 | (val, ada_to_fixed_type (raw_real_type, 0, | |
9feb2d07 | 9228 | val->address (), |
dda83cd7 | 9229 | NULL, 1)); |
14f9c5c9 AS |
9230 | } |
9231 | } | |
d2e4a39e | 9232 | |
d99dcf51 JB |
9233 | /* Given two array types T1 and T2, return nonzero iff both arrays |
9234 | contain the same number of elements. */ | |
9235 | ||
9236 | static int | |
9237 | ada_same_array_size_p (struct type *t1, struct type *t2) | |
9238 | { | |
9239 | LONGEST lo1, hi1, lo2, hi2; | |
9240 | ||
9241 | /* Get the array bounds in order to verify that the size of | |
9242 | the two arrays match. */ | |
9243 | if (!get_array_bounds (t1, &lo1, &hi1) | |
9244 | || !get_array_bounds (t2, &lo2, &hi2)) | |
9245 | error (_("unable to determine array bounds")); | |
9246 | ||
9247 | /* To make things easier for size comparison, normalize a bit | |
9248 | the case of empty arrays by making sure that the difference | |
9249 | between upper bound and lower bound is always -1. */ | |
9250 | if (lo1 > hi1) | |
9251 | hi1 = lo1 - 1; | |
9252 | if (lo2 > hi2) | |
9253 | hi2 = lo2 - 1; | |
9254 | ||
9255 | return (hi1 - lo1 == hi2 - lo2); | |
9256 | } | |
9257 | ||
9258 | /* Assuming that VAL is an array of integrals, and TYPE represents | |
9259 | an array with the same number of elements, but with wider integral | |
9260 | elements, return an array "casted" to TYPE. In practice, this | |
9261 | means that the returned array is built by casting each element | |
9262 | of the original array into TYPE's (wider) element type. */ | |
9263 | ||
9264 | static struct value * | |
9265 | ada_promote_array_of_integrals (struct type *type, struct value *val) | |
9266 | { | |
27710edb | 9267 | struct type *elt_type = type->target_type (); |
d99dcf51 | 9268 | LONGEST lo, hi; |
d99dcf51 JB |
9269 | LONGEST i; |
9270 | ||
9271 | /* Verify that both val and type are arrays of scalars, and | |
9272 | that the size of val's elements is smaller than the size | |
9273 | of type's element. */ | |
78134374 | 9274 | gdb_assert (type->code () == TYPE_CODE_ARRAY); |
27710edb | 9275 | gdb_assert (is_integral_type (type->target_type ())); |
d0c97917 TT |
9276 | gdb_assert (val->type ()->code () == TYPE_CODE_ARRAY); |
9277 | gdb_assert (is_integral_type (val->type ()->target_type ())); | |
df86565b | 9278 | gdb_assert (type->target_type ()->length () |
d0c97917 | 9279 | > val->type ()->target_type ()->length ()); |
d99dcf51 JB |
9280 | |
9281 | if (!get_array_bounds (type, &lo, &hi)) | |
9282 | error (_("unable to determine array bounds")); | |
9283 | ||
4bce7cda SM |
9284 | value *res = allocate_value (type); |
9285 | gdb::array_view<gdb_byte> res_contents = value_contents_writeable (res); | |
d99dcf51 JB |
9286 | |
9287 | /* Promote each array element. */ | |
9288 | for (i = 0; i < hi - lo + 1; i++) | |
9289 | { | |
9290 | struct value *elt = value_cast (elt_type, value_subscript (val, lo + i)); | |
df86565b | 9291 | int elt_len = elt_type->length (); |
d99dcf51 | 9292 | |
4bce7cda | 9293 | copy (value_contents_all (elt), res_contents.slice (elt_len * i, elt_len)); |
d99dcf51 JB |
9294 | } |
9295 | ||
9296 | return res; | |
9297 | } | |
9298 | ||
4c4b4cd2 PH |
9299 | /* Coerce VAL as necessary for assignment to an lval of type TYPE, and |
9300 | return the converted value. */ | |
9301 | ||
d2e4a39e AS |
9302 | static struct value * |
9303 | coerce_for_assign (struct type *type, struct value *val) | |
14f9c5c9 | 9304 | { |
d0c97917 | 9305 | struct type *type2 = val->type (); |
5b4ee69b | 9306 | |
14f9c5c9 AS |
9307 | if (type == type2) |
9308 | return val; | |
9309 | ||
61ee279c PH |
9310 | type2 = ada_check_typedef (type2); |
9311 | type = ada_check_typedef (type); | |
14f9c5c9 | 9312 | |
78134374 SM |
9313 | if (type2->code () == TYPE_CODE_PTR |
9314 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 AS |
9315 | { |
9316 | val = ada_value_ind (val); | |
d0c97917 | 9317 | type2 = val->type (); |
14f9c5c9 AS |
9318 | } |
9319 | ||
78134374 SM |
9320 | if (type2->code () == TYPE_CODE_ARRAY |
9321 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 | 9322 | { |
d99dcf51 JB |
9323 | if (!ada_same_array_size_p (type, type2)) |
9324 | error (_("cannot assign arrays of different length")); | |
9325 | ||
27710edb SM |
9326 | if (is_integral_type (type->target_type ()) |
9327 | && is_integral_type (type2->target_type ()) | |
df86565b | 9328 | && type2->target_type ()->length () < type->target_type ()->length ()) |
d99dcf51 JB |
9329 | { |
9330 | /* Allow implicit promotion of the array elements to | |
9331 | a wider type. */ | |
9332 | return ada_promote_array_of_integrals (type, val); | |
9333 | } | |
9334 | ||
df86565b | 9335 | if (type2->target_type ()->length () != type->target_type ()->length ()) |
dda83cd7 | 9336 | error (_("Incompatible types in assignment")); |
81ae560c | 9337 | val->deprecated_set_type (type); |
14f9c5c9 | 9338 | } |
d2e4a39e | 9339 | return val; |
14f9c5c9 AS |
9340 | } |
9341 | ||
4c4b4cd2 PH |
9342 | static struct value * |
9343 | ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op) | |
9344 | { | |
9345 | struct value *val; | |
9346 | struct type *type1, *type2; | |
9347 | LONGEST v, v1, v2; | |
9348 | ||
994b9211 AC |
9349 | arg1 = coerce_ref (arg1); |
9350 | arg2 = coerce_ref (arg2); | |
d0c97917 TT |
9351 | type1 = get_base_type (ada_check_typedef (arg1->type ())); |
9352 | type2 = get_base_type (ada_check_typedef (arg2->type ())); | |
4c4b4cd2 | 9353 | |
78134374 SM |
9354 | if (type1->code () != TYPE_CODE_INT |
9355 | || type2->code () != TYPE_CODE_INT) | |
4c4b4cd2 PH |
9356 | return value_binop (arg1, arg2, op); |
9357 | ||
76a01679 | 9358 | switch (op) |
4c4b4cd2 PH |
9359 | { |
9360 | case BINOP_MOD: | |
9361 | case BINOP_DIV: | |
9362 | case BINOP_REM: | |
9363 | break; | |
9364 | default: | |
9365 | return value_binop (arg1, arg2, op); | |
9366 | } | |
9367 | ||
9368 | v2 = value_as_long (arg2); | |
9369 | if (v2 == 0) | |
b0f9164c TT |
9370 | { |
9371 | const char *name; | |
9372 | if (op == BINOP_MOD) | |
9373 | name = "mod"; | |
9374 | else if (op == BINOP_DIV) | |
9375 | name = "/"; | |
9376 | else | |
9377 | { | |
9378 | gdb_assert (op == BINOP_REM); | |
9379 | name = "rem"; | |
9380 | } | |
9381 | ||
9382 | error (_("second operand of %s must not be zero."), name); | |
9383 | } | |
4c4b4cd2 | 9384 | |
c6d940a9 | 9385 | if (type1->is_unsigned () || op == BINOP_MOD) |
4c4b4cd2 PH |
9386 | return value_binop (arg1, arg2, op); |
9387 | ||
9388 | v1 = value_as_long (arg1); | |
9389 | switch (op) | |
9390 | { | |
9391 | case BINOP_DIV: | |
9392 | v = v1 / v2; | |
76a01679 | 9393 | if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0) |
dda83cd7 | 9394 | v += v > 0 ? -1 : 1; |
4c4b4cd2 PH |
9395 | break; |
9396 | case BINOP_REM: | |
9397 | v = v1 % v2; | |
76a01679 | 9398 | if (v * v1 < 0) |
dda83cd7 | 9399 | v -= v2; |
4c4b4cd2 PH |
9400 | break; |
9401 | default: | |
9402 | /* Should not reach this point. */ | |
9403 | v = 0; | |
9404 | } | |
9405 | ||
9406 | val = allocate_value (type1); | |
50888e42 | 9407 | store_unsigned_integer (value_contents_raw (val).data (), |
d0c97917 | 9408 | val->type ()->length (), |
34877895 | 9409 | type_byte_order (type1), v); |
4c4b4cd2 PH |
9410 | return val; |
9411 | } | |
9412 | ||
9413 | static int | |
9414 | ada_value_equal (struct value *arg1, struct value *arg2) | |
9415 | { | |
d0c97917 TT |
9416 | if (ada_is_direct_array_type (arg1->type ()) |
9417 | || ada_is_direct_array_type (arg2->type ())) | |
4c4b4cd2 | 9418 | { |
79e8fcaa JB |
9419 | struct type *arg1_type, *arg2_type; |
9420 | ||
f58b38bf | 9421 | /* Automatically dereference any array reference before |
dda83cd7 | 9422 | we attempt to perform the comparison. */ |
f58b38bf JB |
9423 | arg1 = ada_coerce_ref (arg1); |
9424 | arg2 = ada_coerce_ref (arg2); | |
79e8fcaa | 9425 | |
4c4b4cd2 PH |
9426 | arg1 = ada_coerce_to_simple_array (arg1); |
9427 | arg2 = ada_coerce_to_simple_array (arg2); | |
79e8fcaa | 9428 | |
d0c97917 TT |
9429 | arg1_type = ada_check_typedef (arg1->type ()); |
9430 | arg2_type = ada_check_typedef (arg2->type ()); | |
79e8fcaa | 9431 | |
78134374 | 9432 | if (arg1_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
9433 | || arg2_type->code () != TYPE_CODE_ARRAY) |
9434 | error (_("Attempt to compare array with non-array")); | |
4c4b4cd2 | 9435 | /* FIXME: The following works only for types whose |
dda83cd7 SM |
9436 | representations use all bits (no padding or undefined bits) |
9437 | and do not have user-defined equality. */ | |
df86565b | 9438 | return (arg1_type->length () == arg2_type->length () |
50888e42 SM |
9439 | && memcmp (value_contents (arg1).data (), |
9440 | value_contents (arg2).data (), | |
df86565b | 9441 | arg1_type->length ()) == 0); |
4c4b4cd2 PH |
9442 | } |
9443 | return value_equal (arg1, arg2); | |
9444 | } | |
9445 | ||
d3c54a1c TT |
9446 | namespace expr |
9447 | { | |
9448 | ||
9449 | bool | |
9450 | check_objfile (const std::unique_ptr<ada_component> &comp, | |
9451 | struct objfile *objfile) | |
9452 | { | |
9453 | return comp->uses_objfile (objfile); | |
9454 | } | |
9455 | ||
9456 | /* Assign the result of evaluating ARG starting at *POS to the INDEXth | |
9457 | component of LHS (a simple array or a record). Does not modify the | |
9458 | inferior's memory, nor does it modify LHS (unless LHS == | |
9459 | CONTAINER). */ | |
52ce6436 PH |
9460 | |
9461 | static void | |
9462 | assign_component (struct value *container, struct value *lhs, LONGEST index, | |
d3c54a1c | 9463 | struct expression *exp, operation_up &arg) |
52ce6436 | 9464 | { |
d3c54a1c TT |
9465 | scoped_value_mark mark; |
9466 | ||
52ce6436 | 9467 | struct value *elt; |
d0c97917 | 9468 | struct type *lhs_type = check_typedef (lhs->type ()); |
5b4ee69b | 9469 | |
78134374 | 9470 | if (lhs_type->code () == TYPE_CODE_ARRAY) |
52ce6436 | 9471 | { |
22601c15 UW |
9472 | struct type *index_type = builtin_type (exp->gdbarch)->builtin_int; |
9473 | struct value *index_val = value_from_longest (index_type, index); | |
5b4ee69b | 9474 | |
52ce6436 PH |
9475 | elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val)); |
9476 | } | |
9477 | else | |
9478 | { | |
d0c97917 | 9479 | elt = ada_index_struct_field (index, lhs, 0, lhs->type ()); |
c48db5ca | 9480 | elt = ada_to_fixed_value (elt); |
52ce6436 PH |
9481 | } |
9482 | ||
d3c54a1c TT |
9483 | ada_aggregate_operation *ag_op |
9484 | = dynamic_cast<ada_aggregate_operation *> (arg.get ()); | |
9485 | if (ag_op != nullptr) | |
9486 | ag_op->assign_aggregate (container, elt, exp); | |
52ce6436 | 9487 | else |
d3c54a1c TT |
9488 | value_assign_to_component (container, elt, |
9489 | arg->evaluate (nullptr, exp, | |
9490 | EVAL_NORMAL)); | |
9491 | } | |
52ce6436 | 9492 | |
d3c54a1c TT |
9493 | bool |
9494 | ada_aggregate_component::uses_objfile (struct objfile *objfile) | |
9495 | { | |
9496 | for (const auto &item : m_components) | |
9497 | if (item->uses_objfile (objfile)) | |
9498 | return true; | |
9499 | return false; | |
9500 | } | |
9501 | ||
9502 | void | |
9503 | ada_aggregate_component::dump (ui_file *stream, int depth) | |
9504 | { | |
6cb06a8c | 9505 | gdb_printf (stream, _("%*sAggregate\n"), depth, ""); |
d3c54a1c TT |
9506 | for (const auto &item : m_components) |
9507 | item->dump (stream, depth + 1); | |
9508 | } | |
9509 | ||
9510 | void | |
9511 | ada_aggregate_component::assign (struct value *container, | |
9512 | struct value *lhs, struct expression *exp, | |
9513 | std::vector<LONGEST> &indices, | |
9514 | LONGEST low, LONGEST high) | |
9515 | { | |
9516 | for (auto &item : m_components) | |
9517 | item->assign (container, lhs, exp, indices, low, high); | |
52ce6436 PH |
9518 | } |
9519 | ||
207582c0 | 9520 | /* See ada-exp.h. */ |
52ce6436 | 9521 | |
207582c0 | 9522 | value * |
d3c54a1c TT |
9523 | ada_aggregate_operation::assign_aggregate (struct value *container, |
9524 | struct value *lhs, | |
9525 | struct expression *exp) | |
52ce6436 PH |
9526 | { |
9527 | struct type *lhs_type; | |
52ce6436 | 9528 | LONGEST low_index, high_index; |
52ce6436 PH |
9529 | |
9530 | container = ada_coerce_ref (container); | |
d0c97917 | 9531 | if (ada_is_direct_array_type (container->type ())) |
52ce6436 PH |
9532 | container = ada_coerce_to_simple_array (container); |
9533 | lhs = ada_coerce_ref (lhs); | |
4b53ca88 | 9534 | if (!lhs->deprecated_modifiable ()) |
52ce6436 PH |
9535 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
9536 | ||
d0c97917 | 9537 | lhs_type = check_typedef (lhs->type ()); |
52ce6436 PH |
9538 | if (ada_is_direct_array_type (lhs_type)) |
9539 | { | |
9540 | lhs = ada_coerce_to_simple_array (lhs); | |
d0c97917 | 9541 | lhs_type = check_typedef (lhs->type ()); |
cf88be68 SM |
9542 | low_index = lhs_type->bounds ()->low.const_val (); |
9543 | high_index = lhs_type->bounds ()->high.const_val (); | |
52ce6436 | 9544 | } |
78134374 | 9545 | else if (lhs_type->code () == TYPE_CODE_STRUCT) |
52ce6436 PH |
9546 | { |
9547 | low_index = 0; | |
9548 | high_index = num_visible_fields (lhs_type) - 1; | |
52ce6436 PH |
9549 | } |
9550 | else | |
9551 | error (_("Left-hand side must be array or record.")); | |
9552 | ||
cf608cc4 | 9553 | std::vector<LONGEST> indices (4); |
52ce6436 PH |
9554 | indices[0] = indices[1] = low_index - 1; |
9555 | indices[2] = indices[3] = high_index + 1; | |
52ce6436 | 9556 | |
d3c54a1c TT |
9557 | std::get<0> (m_storage)->assign (container, lhs, exp, indices, |
9558 | low_index, high_index); | |
207582c0 TT |
9559 | |
9560 | return container; | |
d3c54a1c TT |
9561 | } |
9562 | ||
9563 | bool | |
9564 | ada_positional_component::uses_objfile (struct objfile *objfile) | |
9565 | { | |
9566 | return m_op->uses_objfile (objfile); | |
9567 | } | |
52ce6436 | 9568 | |
d3c54a1c TT |
9569 | void |
9570 | ada_positional_component::dump (ui_file *stream, int depth) | |
9571 | { | |
6cb06a8c TT |
9572 | gdb_printf (stream, _("%*sPositional, index = %d\n"), |
9573 | depth, "", m_index); | |
d3c54a1c | 9574 | m_op->dump (stream, depth + 1); |
52ce6436 | 9575 | } |
d3c54a1c | 9576 | |
52ce6436 | 9577 | /* Assign into the component of LHS indexed by the OP_POSITIONAL |
d3c54a1c TT |
9578 | construct, given that the positions are relative to lower bound |
9579 | LOW, where HIGH is the upper bound. Record the position in | |
9580 | INDICES. CONTAINER is as for assign_aggregate. */ | |
9581 | void | |
9582 | ada_positional_component::assign (struct value *container, | |
9583 | struct value *lhs, struct expression *exp, | |
9584 | std::vector<LONGEST> &indices, | |
9585 | LONGEST low, LONGEST high) | |
52ce6436 | 9586 | { |
d3c54a1c TT |
9587 | LONGEST ind = m_index + low; |
9588 | ||
52ce6436 | 9589 | if (ind - 1 == high) |
e1d5a0d2 | 9590 | warning (_("Extra components in aggregate ignored.")); |
52ce6436 PH |
9591 | if (ind <= high) |
9592 | { | |
cf608cc4 | 9593 | add_component_interval (ind, ind, indices); |
d3c54a1c | 9594 | assign_component (container, lhs, ind, exp, m_op); |
52ce6436 | 9595 | } |
52ce6436 PH |
9596 | } |
9597 | ||
d3c54a1c TT |
9598 | bool |
9599 | ada_discrete_range_association::uses_objfile (struct objfile *objfile) | |
a88c4354 TT |
9600 | { |
9601 | return m_low->uses_objfile (objfile) || m_high->uses_objfile (objfile); | |
9602 | } | |
9603 | ||
9604 | void | |
9605 | ada_discrete_range_association::dump (ui_file *stream, int depth) | |
9606 | { | |
6cb06a8c | 9607 | gdb_printf (stream, _("%*sDiscrete range:\n"), depth, ""); |
a88c4354 TT |
9608 | m_low->dump (stream, depth + 1); |
9609 | m_high->dump (stream, depth + 1); | |
9610 | } | |
9611 | ||
9612 | void | |
9613 | ada_discrete_range_association::assign (struct value *container, | |
9614 | struct value *lhs, | |
9615 | struct expression *exp, | |
9616 | std::vector<LONGEST> &indices, | |
9617 | LONGEST low, LONGEST high, | |
9618 | operation_up &op) | |
9619 | { | |
9620 | LONGEST lower = value_as_long (m_low->evaluate (nullptr, exp, EVAL_NORMAL)); | |
9621 | LONGEST upper = value_as_long (m_high->evaluate (nullptr, exp, EVAL_NORMAL)); | |
9622 | ||
9623 | if (lower <= upper && (lower < low || upper > high)) | |
9624 | error (_("Index in component association out of bounds.")); | |
9625 | ||
9626 | add_component_interval (lower, upper, indices); | |
9627 | while (lower <= upper) | |
9628 | { | |
9629 | assign_component (container, lhs, lower, exp, op); | |
9630 | lower += 1; | |
9631 | } | |
9632 | } | |
9633 | ||
9634 | bool | |
9635 | ada_name_association::uses_objfile (struct objfile *objfile) | |
9636 | { | |
9637 | return m_val->uses_objfile (objfile); | |
9638 | } | |
9639 | ||
9640 | void | |
9641 | ada_name_association::dump (ui_file *stream, int depth) | |
9642 | { | |
6cb06a8c | 9643 | gdb_printf (stream, _("%*sName:\n"), depth, ""); |
a88c4354 TT |
9644 | m_val->dump (stream, depth + 1); |
9645 | } | |
9646 | ||
9647 | void | |
9648 | ada_name_association::assign (struct value *container, | |
9649 | struct value *lhs, | |
9650 | struct expression *exp, | |
9651 | std::vector<LONGEST> &indices, | |
9652 | LONGEST low, LONGEST high, | |
9653 | operation_up &op) | |
9654 | { | |
9655 | int index; | |
9656 | ||
d0c97917 | 9657 | if (ada_is_direct_array_type (lhs->type ())) |
a88c4354 TT |
9658 | index = longest_to_int (value_as_long (m_val->evaluate (nullptr, exp, |
9659 | EVAL_NORMAL))); | |
9660 | else | |
9661 | { | |
9662 | ada_string_operation *strop | |
9663 | = dynamic_cast<ada_string_operation *> (m_val.get ()); | |
9664 | ||
9665 | const char *name; | |
9666 | if (strop != nullptr) | |
9667 | name = strop->get_name (); | |
9668 | else | |
9669 | { | |
9670 | ada_var_value_operation *vvo | |
9671 | = dynamic_cast<ada_var_value_operation *> (m_val.get ()); | |
9672 | if (vvo != nullptr) | |
9673 | error (_("Invalid record component association.")); | |
9674 | name = vvo->get_symbol ()->natural_name (); | |
9675 | } | |
9676 | ||
9677 | index = 0; | |
d0c97917 | 9678 | if (! find_struct_field (name, lhs->type (), 0, |
a88c4354 TT |
9679 | NULL, NULL, NULL, NULL, &index)) |
9680 | error (_("Unknown component name: %s."), name); | |
9681 | } | |
9682 | ||
9683 | add_component_interval (index, index, indices); | |
9684 | assign_component (container, lhs, index, exp, op); | |
9685 | } | |
9686 | ||
9687 | bool | |
9688 | ada_choices_component::uses_objfile (struct objfile *objfile) | |
9689 | { | |
9690 | if (m_op->uses_objfile (objfile)) | |
9691 | return true; | |
9692 | for (const auto &item : m_assocs) | |
9693 | if (item->uses_objfile (objfile)) | |
9694 | return true; | |
9695 | return false; | |
9696 | } | |
9697 | ||
9698 | void | |
9699 | ada_choices_component::dump (ui_file *stream, int depth) | |
9700 | { | |
6cb06a8c | 9701 | gdb_printf (stream, _("%*sChoices:\n"), depth, ""); |
a88c4354 TT |
9702 | m_op->dump (stream, depth + 1); |
9703 | for (const auto &item : m_assocs) | |
9704 | item->dump (stream, depth + 1); | |
9705 | } | |
9706 | ||
9707 | /* Assign into the components of LHS indexed by the OP_CHOICES | |
9708 | construct at *POS, updating *POS past the construct, given that | |
9709 | the allowable indices are LOW..HIGH. Record the indices assigned | |
9710 | to in INDICES. CONTAINER is as for assign_aggregate. */ | |
9711 | void | |
9712 | ada_choices_component::assign (struct value *container, | |
9713 | struct value *lhs, struct expression *exp, | |
9714 | std::vector<LONGEST> &indices, | |
9715 | LONGEST low, LONGEST high) | |
9716 | { | |
9717 | for (auto &item : m_assocs) | |
9718 | item->assign (container, lhs, exp, indices, low, high, m_op); | |
9719 | } | |
9720 | ||
9721 | bool | |
9722 | ada_others_component::uses_objfile (struct objfile *objfile) | |
9723 | { | |
9724 | return m_op->uses_objfile (objfile); | |
9725 | } | |
9726 | ||
9727 | void | |
9728 | ada_others_component::dump (ui_file *stream, int depth) | |
9729 | { | |
6cb06a8c | 9730 | gdb_printf (stream, _("%*sOthers:\n"), depth, ""); |
a88c4354 TT |
9731 | m_op->dump (stream, depth + 1); |
9732 | } | |
9733 | ||
9734 | /* Assign the value of the expression in the OP_OTHERS construct in | |
9735 | EXP at *POS into the components of LHS indexed from LOW .. HIGH that | |
9736 | have not been previously assigned. The index intervals already assigned | |
9737 | are in INDICES. CONTAINER is as for assign_aggregate. */ | |
9738 | void | |
9739 | ada_others_component::assign (struct value *container, | |
9740 | struct value *lhs, struct expression *exp, | |
9741 | std::vector<LONGEST> &indices, | |
9742 | LONGEST low, LONGEST high) | |
9743 | { | |
9744 | int num_indices = indices.size (); | |
9745 | for (int i = 0; i < num_indices - 2; i += 2) | |
9746 | { | |
9747 | for (LONGEST ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1) | |
9748 | assign_component (container, lhs, ind, exp, m_op); | |
9749 | } | |
9750 | } | |
9751 | ||
9752 | struct value * | |
9753 | ada_assign_operation::evaluate (struct type *expect_type, | |
9754 | struct expression *exp, | |
9755 | enum noside noside) | |
9756 | { | |
9757 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
9758 | ||
9759 | ada_aggregate_operation *ag_op | |
9760 | = dynamic_cast<ada_aggregate_operation *> (std::get<1> (m_storage).get ()); | |
9761 | if (ag_op != nullptr) | |
9762 | { | |
9763 | if (noside != EVAL_NORMAL) | |
9764 | return arg1; | |
9765 | ||
207582c0 | 9766 | arg1 = ag_op->assign_aggregate (arg1, arg1, exp); |
a88c4354 TT |
9767 | return ada_value_assign (arg1, arg1); |
9768 | } | |
9769 | /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1, | |
9770 | except if the lhs of our assignment is a convenience variable. | |
9771 | In the case of assigning to a convenience variable, the lhs | |
9772 | should be exactly the result of the evaluation of the rhs. */ | |
d0c97917 | 9773 | struct type *type = arg1->type (); |
a88c4354 TT |
9774 | if (VALUE_LVAL (arg1) == lval_internalvar) |
9775 | type = NULL; | |
9776 | value *arg2 = std::get<1> (m_storage)->evaluate (type, exp, noside); | |
0b2b0b82 | 9777 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
a88c4354 TT |
9778 | return arg1; |
9779 | if (VALUE_LVAL (arg1) == lval_internalvar) | |
9780 | { | |
9781 | /* Nothing. */ | |
9782 | } | |
9783 | else | |
d0c97917 | 9784 | arg2 = coerce_for_assign (arg1->type (), arg2); |
a88c4354 TT |
9785 | return ada_value_assign (arg1, arg2); |
9786 | } | |
9787 | ||
9788 | } /* namespace expr */ | |
9789 | ||
cf608cc4 TT |
9790 | /* Add the interval [LOW .. HIGH] to the sorted set of intervals |
9791 | [ INDICES[0] .. INDICES[1] ],... The resulting intervals do not | |
9792 | overlap. */ | |
52ce6436 PH |
9793 | static void |
9794 | add_component_interval (LONGEST low, LONGEST high, | |
cf608cc4 | 9795 | std::vector<LONGEST> &indices) |
52ce6436 PH |
9796 | { |
9797 | int i, j; | |
5b4ee69b | 9798 | |
cf608cc4 TT |
9799 | int size = indices.size (); |
9800 | for (i = 0; i < size; i += 2) { | |
52ce6436 PH |
9801 | if (high >= indices[i] && low <= indices[i + 1]) |
9802 | { | |
9803 | int kh; | |
5b4ee69b | 9804 | |
cf608cc4 | 9805 | for (kh = i + 2; kh < size; kh += 2) |
52ce6436 PH |
9806 | if (high < indices[kh]) |
9807 | break; | |
9808 | if (low < indices[i]) | |
9809 | indices[i] = low; | |
9810 | indices[i + 1] = indices[kh - 1]; | |
9811 | if (high > indices[i + 1]) | |
9812 | indices[i + 1] = high; | |
cf608cc4 TT |
9813 | memcpy (indices.data () + i + 2, indices.data () + kh, size - kh); |
9814 | indices.resize (kh - i - 2); | |
52ce6436 PH |
9815 | return; |
9816 | } | |
9817 | else if (high < indices[i]) | |
9818 | break; | |
9819 | } | |
9820 | ||
cf608cc4 | 9821 | indices.resize (indices.size () + 2); |
d4813f10 | 9822 | for (j = indices.size () - 1; j >= i + 2; j -= 1) |
52ce6436 PH |
9823 | indices[j] = indices[j - 2]; |
9824 | indices[i] = low; | |
9825 | indices[i + 1] = high; | |
9826 | } | |
9827 | ||
6e48bd2c JB |
9828 | /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2 |
9829 | is different. */ | |
9830 | ||
9831 | static struct value * | |
b7e22850 | 9832 | ada_value_cast (struct type *type, struct value *arg2) |
6e48bd2c | 9833 | { |
d0c97917 | 9834 | if (type == ada_check_typedef (arg2->type ())) |
6e48bd2c JB |
9835 | return arg2; |
9836 | ||
6e48bd2c JB |
9837 | return value_cast (type, arg2); |
9838 | } | |
9839 | ||
284614f0 JB |
9840 | /* Evaluating Ada expressions, and printing their result. |
9841 | ------------------------------------------------------ | |
9842 | ||
21649b50 JB |
9843 | 1. Introduction: |
9844 | ---------------- | |
9845 | ||
284614f0 JB |
9846 | We usually evaluate an Ada expression in order to print its value. |
9847 | We also evaluate an expression in order to print its type, which | |
9848 | happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation, | |
9849 | but we'll focus mostly on the EVAL_NORMAL phase. In practice, the | |
9850 | EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of | |
9851 | the evaluation compared to the EVAL_NORMAL, but is otherwise very | |
9852 | similar. | |
9853 | ||
9854 | Evaluating expressions is a little more complicated for Ada entities | |
9855 | than it is for entities in languages such as C. The main reason for | |
9856 | this is that Ada provides types whose definition might be dynamic. | |
9857 | One example of such types is variant records. Or another example | |
9858 | would be an array whose bounds can only be known at run time. | |
9859 | ||
9860 | The following description is a general guide as to what should be | |
9861 | done (and what should NOT be done) in order to evaluate an expression | |
9862 | involving such types, and when. This does not cover how the semantic | |
9863 | information is encoded by GNAT as this is covered separatly. For the | |
9864 | document used as the reference for the GNAT encoding, see exp_dbug.ads | |
9865 | in the GNAT sources. | |
9866 | ||
9867 | Ideally, we should embed each part of this description next to its | |
9868 | associated code. Unfortunately, the amount of code is so vast right | |
9869 | now that it's hard to see whether the code handling a particular | |
9870 | situation might be duplicated or not. One day, when the code is | |
9871 | cleaned up, this guide might become redundant with the comments | |
9872 | inserted in the code, and we might want to remove it. | |
9873 | ||
21649b50 JB |
9874 | 2. ``Fixing'' an Entity, the Simple Case: |
9875 | ----------------------------------------- | |
9876 | ||
284614f0 JB |
9877 | When evaluating Ada expressions, the tricky issue is that they may |
9878 | reference entities whose type contents and size are not statically | |
9879 | known. Consider for instance a variant record: | |
9880 | ||
9881 | type Rec (Empty : Boolean := True) is record | |
dda83cd7 SM |
9882 | case Empty is |
9883 | when True => null; | |
9884 | when False => Value : Integer; | |
9885 | end case; | |
284614f0 JB |
9886 | end record; |
9887 | Yes : Rec := (Empty => False, Value => 1); | |
9888 | No : Rec := (empty => True); | |
9889 | ||
9890 | The size and contents of that record depends on the value of the | |
9891 | descriminant (Rec.Empty). At this point, neither the debugging | |
9892 | information nor the associated type structure in GDB are able to | |
9893 | express such dynamic types. So what the debugger does is to create | |
9894 | "fixed" versions of the type that applies to the specific object. | |
30baf67b | 9895 | We also informally refer to this operation as "fixing" an object, |
284614f0 JB |
9896 | which means creating its associated fixed type. |
9897 | ||
9898 | Example: when printing the value of variable "Yes" above, its fixed | |
9899 | type would look like this: | |
9900 | ||
9901 | type Rec is record | |
dda83cd7 SM |
9902 | Empty : Boolean; |
9903 | Value : Integer; | |
284614f0 JB |
9904 | end record; |
9905 | ||
9906 | On the other hand, if we printed the value of "No", its fixed type | |
9907 | would become: | |
9908 | ||
9909 | type Rec is record | |
dda83cd7 | 9910 | Empty : Boolean; |
284614f0 JB |
9911 | end record; |
9912 | ||
9913 | Things become a little more complicated when trying to fix an entity | |
9914 | with a dynamic type that directly contains another dynamic type, | |
9915 | such as an array of variant records, for instance. There are | |
9916 | two possible cases: Arrays, and records. | |
9917 | ||
21649b50 JB |
9918 | 3. ``Fixing'' Arrays: |
9919 | --------------------- | |
9920 | ||
9921 | The type structure in GDB describes an array in terms of its bounds, | |
9922 | and the type of its elements. By design, all elements in the array | |
9923 | have the same type and we cannot represent an array of variant elements | |
9924 | using the current type structure in GDB. When fixing an array, | |
9925 | we cannot fix the array element, as we would potentially need one | |
9926 | fixed type per element of the array. As a result, the best we can do | |
9927 | when fixing an array is to produce an array whose bounds and size | |
9928 | are correct (allowing us to read it from memory), but without having | |
9929 | touched its element type. Fixing each element will be done later, | |
9930 | when (if) necessary. | |
9931 | ||
9932 | Arrays are a little simpler to handle than records, because the same | |
9933 | amount of memory is allocated for each element of the array, even if | |
1b536f04 | 9934 | the amount of space actually used by each element differs from element |
21649b50 | 9935 | to element. Consider for instance the following array of type Rec: |
284614f0 JB |
9936 | |
9937 | type Rec_Array is array (1 .. 2) of Rec; | |
9938 | ||
1b536f04 JB |
9939 | The actual amount of memory occupied by each element might be different |
9940 | from element to element, depending on the value of their discriminant. | |
21649b50 | 9941 | But the amount of space reserved for each element in the array remains |
1b536f04 | 9942 | fixed regardless. So we simply need to compute that size using |
21649b50 JB |
9943 | the debugging information available, from which we can then determine |
9944 | the array size (we multiply the number of elements of the array by | |
9945 | the size of each element). | |
9946 | ||
9947 | The simplest case is when we have an array of a constrained element | |
9948 | type. For instance, consider the following type declarations: | |
9949 | ||
dda83cd7 SM |
9950 | type Bounded_String (Max_Size : Integer) is |
9951 | Length : Integer; | |
9952 | Buffer : String (1 .. Max_Size); | |
9953 | end record; | |
9954 | type Bounded_String_Array is array (1 ..2) of Bounded_String (80); | |
21649b50 JB |
9955 | |
9956 | In this case, the compiler describes the array as an array of | |
9957 | variable-size elements (identified by its XVS suffix) for which | |
9958 | the size can be read in the parallel XVZ variable. | |
9959 | ||
9960 | In the case of an array of an unconstrained element type, the compiler | |
9961 | wraps the array element inside a private PAD type. This type should not | |
9962 | be shown to the user, and must be "unwrap"'ed before printing. Note | |
284614f0 JB |
9963 | that we also use the adjective "aligner" in our code to designate |
9964 | these wrapper types. | |
9965 | ||
1b536f04 | 9966 | In some cases, the size allocated for each element is statically |
21649b50 JB |
9967 | known. In that case, the PAD type already has the correct size, |
9968 | and the array element should remain unfixed. | |
9969 | ||
9970 | But there are cases when this size is not statically known. | |
9971 | For instance, assuming that "Five" is an integer variable: | |
284614f0 | 9972 | |
dda83cd7 SM |
9973 | type Dynamic is array (1 .. Five) of Integer; |
9974 | type Wrapper (Has_Length : Boolean := False) is record | |
9975 | Data : Dynamic; | |
9976 | case Has_Length is | |
9977 | when True => Length : Integer; | |
9978 | when False => null; | |
9979 | end case; | |
9980 | end record; | |
9981 | type Wrapper_Array is array (1 .. 2) of Wrapper; | |
284614f0 | 9982 | |
dda83cd7 SM |
9983 | Hello : Wrapper_Array := (others => (Has_Length => True, |
9984 | Data => (others => 17), | |
9985 | Length => 1)); | |
284614f0 JB |
9986 | |
9987 | ||
9988 | The debugging info would describe variable Hello as being an | |
9989 | array of a PAD type. The size of that PAD type is not statically | |
9990 | known, but can be determined using a parallel XVZ variable. | |
9991 | In that case, a copy of the PAD type with the correct size should | |
9992 | be used for the fixed array. | |
9993 | ||
21649b50 JB |
9994 | 3. ``Fixing'' record type objects: |
9995 | ---------------------------------- | |
9996 | ||
9997 | Things are slightly different from arrays in the case of dynamic | |
284614f0 JB |
9998 | record types. In this case, in order to compute the associated |
9999 | fixed type, we need to determine the size and offset of each of | |
10000 | its components. This, in turn, requires us to compute the fixed | |
10001 | type of each of these components. | |
10002 | ||
10003 | Consider for instance the example: | |
10004 | ||
dda83cd7 SM |
10005 | type Bounded_String (Max_Size : Natural) is record |
10006 | Str : String (1 .. Max_Size); | |
10007 | Length : Natural; | |
10008 | end record; | |
10009 | My_String : Bounded_String (Max_Size => 10); | |
284614f0 JB |
10010 | |
10011 | In that case, the position of field "Length" depends on the size | |
10012 | of field Str, which itself depends on the value of the Max_Size | |
21649b50 | 10013 | discriminant. In order to fix the type of variable My_String, |
284614f0 JB |
10014 | we need to fix the type of field Str. Therefore, fixing a variant |
10015 | record requires us to fix each of its components. | |
10016 | ||
10017 | However, if a component does not have a dynamic size, the component | |
10018 | should not be fixed. In particular, fields that use a PAD type | |
10019 | should not fixed. Here is an example where this might happen | |
10020 | (assuming type Rec above): | |
10021 | ||
10022 | type Container (Big : Boolean) is record | |
dda83cd7 SM |
10023 | First : Rec; |
10024 | After : Integer; | |
10025 | case Big is | |
10026 | when True => Another : Integer; | |
10027 | when False => null; | |
10028 | end case; | |
284614f0 JB |
10029 | end record; |
10030 | My_Container : Container := (Big => False, | |
dda83cd7 SM |
10031 | First => (Empty => True), |
10032 | After => 42); | |
284614f0 JB |
10033 | |
10034 | In that example, the compiler creates a PAD type for component First, | |
10035 | whose size is constant, and then positions the component After just | |
10036 | right after it. The offset of component After is therefore constant | |
10037 | in this case. | |
10038 | ||
10039 | The debugger computes the position of each field based on an algorithm | |
10040 | that uses, among other things, the actual position and size of the field | |
21649b50 JB |
10041 | preceding it. Let's now imagine that the user is trying to print |
10042 | the value of My_Container. If the type fixing was recursive, we would | |
284614f0 JB |
10043 | end up computing the offset of field After based on the size of the |
10044 | fixed version of field First. And since in our example First has | |
10045 | only one actual field, the size of the fixed type is actually smaller | |
10046 | than the amount of space allocated to that field, and thus we would | |
10047 | compute the wrong offset of field After. | |
10048 | ||
21649b50 JB |
10049 | To make things more complicated, we need to watch out for dynamic |
10050 | components of variant records (identified by the ___XVL suffix in | |
10051 | the component name). Even if the target type is a PAD type, the size | |
10052 | of that type might not be statically known. So the PAD type needs | |
10053 | to be unwrapped and the resulting type needs to be fixed. Otherwise, | |
10054 | we might end up with the wrong size for our component. This can be | |
10055 | observed with the following type declarations: | |
284614f0 | 10056 | |
dda83cd7 SM |
10057 | type Octal is new Integer range 0 .. 7; |
10058 | type Octal_Array is array (Positive range <>) of Octal; | |
10059 | pragma Pack (Octal_Array); | |
284614f0 | 10060 | |
dda83cd7 SM |
10061 | type Octal_Buffer (Size : Positive) is record |
10062 | Buffer : Octal_Array (1 .. Size); | |
10063 | Length : Integer; | |
10064 | end record; | |
284614f0 JB |
10065 | |
10066 | In that case, Buffer is a PAD type whose size is unset and needs | |
10067 | to be computed by fixing the unwrapped type. | |
10068 | ||
21649b50 JB |
10069 | 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity: |
10070 | ---------------------------------------------------------- | |
10071 | ||
10072 | Lastly, when should the sub-elements of an entity that remained unfixed | |
284614f0 JB |
10073 | thus far, be actually fixed? |
10074 | ||
10075 | The answer is: Only when referencing that element. For instance | |
10076 | when selecting one component of a record, this specific component | |
10077 | should be fixed at that point in time. Or when printing the value | |
10078 | of a record, each component should be fixed before its value gets | |
10079 | printed. Similarly for arrays, the element of the array should be | |
10080 | fixed when printing each element of the array, or when extracting | |
10081 | one element out of that array. On the other hand, fixing should | |
10082 | not be performed on the elements when taking a slice of an array! | |
10083 | ||
31432a67 | 10084 | Note that one of the side effects of miscomputing the offset and |
284614f0 JB |
10085 | size of each field is that we end up also miscomputing the size |
10086 | of the containing type. This can have adverse results when computing | |
10087 | the value of an entity. GDB fetches the value of an entity based | |
10088 | on the size of its type, and thus a wrong size causes GDB to fetch | |
10089 | the wrong amount of memory. In the case where the computed size is | |
10090 | too small, GDB fetches too little data to print the value of our | |
31432a67 | 10091 | entity. Results in this case are unpredictable, as we usually read |
284614f0 JB |
10092 | past the buffer containing the data =:-o. */ |
10093 | ||
62d4bd94 TT |
10094 | /* A helper function for TERNOP_IN_RANGE. */ |
10095 | ||
10096 | static value * | |
10097 | eval_ternop_in_range (struct type *expect_type, struct expression *exp, | |
10098 | enum noside noside, | |
10099 | value *arg1, value *arg2, value *arg3) | |
10100 | { | |
62d4bd94 TT |
10101 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10102 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
10103 | struct type *type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10104 | return | |
10105 | value_from_longest (type, | |
10106 | (value_less (arg1, arg3) | |
10107 | || value_equal (arg1, arg3)) | |
10108 | && (value_less (arg2, arg1) | |
10109 | || value_equal (arg2, arg1))); | |
10110 | } | |
10111 | ||
82390ab8 TT |
10112 | /* A helper function for UNOP_NEG. */ |
10113 | ||
7c15d377 | 10114 | value * |
82390ab8 TT |
10115 | ada_unop_neg (struct type *expect_type, |
10116 | struct expression *exp, | |
10117 | enum noside noside, enum exp_opcode op, | |
10118 | struct value *arg1) | |
10119 | { | |
82390ab8 TT |
10120 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); |
10121 | return value_neg (arg1); | |
10122 | } | |
10123 | ||
7efc87ff TT |
10124 | /* A helper function for UNOP_IN_RANGE. */ |
10125 | ||
95d49dfb | 10126 | value * |
7efc87ff TT |
10127 | ada_unop_in_range (struct type *expect_type, |
10128 | struct expression *exp, | |
10129 | enum noside noside, enum exp_opcode op, | |
10130 | struct value *arg1, struct type *type) | |
10131 | { | |
7efc87ff TT |
10132 | struct value *arg2, *arg3; |
10133 | switch (type->code ()) | |
10134 | { | |
10135 | default: | |
10136 | lim_warning (_("Membership test incompletely implemented; " | |
10137 | "always returns true")); | |
10138 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10139 | return value_from_longest (type, (LONGEST) 1); | |
10140 | ||
10141 | case TYPE_CODE_RANGE: | |
10142 | arg2 = value_from_longest (type, | |
10143 | type->bounds ()->low.const_val ()); | |
10144 | arg3 = value_from_longest (type, | |
10145 | type->bounds ()->high.const_val ()); | |
10146 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10147 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
10148 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10149 | return | |
10150 | value_from_longest (type, | |
10151 | (value_less (arg1, arg3) | |
10152 | || value_equal (arg1, arg3)) | |
10153 | && (value_less (arg2, arg1) | |
10154 | || value_equal (arg2, arg1))); | |
10155 | } | |
10156 | } | |
10157 | ||
020dbabe TT |
10158 | /* A helper function for OP_ATR_TAG. */ |
10159 | ||
7c15d377 | 10160 | value * |
020dbabe TT |
10161 | ada_atr_tag (struct type *expect_type, |
10162 | struct expression *exp, | |
10163 | enum noside noside, enum exp_opcode op, | |
10164 | struct value *arg1) | |
10165 | { | |
10166 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10167 | return value_zero (ada_tag_type (arg1), not_lval); | |
10168 | ||
10169 | return ada_value_tag (arg1); | |
10170 | } | |
10171 | ||
68c75735 TT |
10172 | /* A helper function for OP_ATR_SIZE. */ |
10173 | ||
7c15d377 | 10174 | value * |
68c75735 TT |
10175 | ada_atr_size (struct type *expect_type, |
10176 | struct expression *exp, | |
10177 | enum noside noside, enum exp_opcode op, | |
10178 | struct value *arg1) | |
10179 | { | |
d0c97917 | 10180 | struct type *type = arg1->type (); |
68c75735 TT |
10181 | |
10182 | /* If the argument is a reference, then dereference its type, since | |
10183 | the user is really asking for the size of the actual object, | |
10184 | not the size of the pointer. */ | |
10185 | if (type->code () == TYPE_CODE_REF) | |
27710edb | 10186 | type = type->target_type (); |
68c75735 | 10187 | |
0b2b0b82 | 10188 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
68c75735 TT |
10189 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval); |
10190 | else | |
10191 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, | |
df86565b | 10192 | TARGET_CHAR_BIT * type->length ()); |
68c75735 TT |
10193 | } |
10194 | ||
d05e24e6 TT |
10195 | /* A helper function for UNOP_ABS. */ |
10196 | ||
7c15d377 | 10197 | value * |
d05e24e6 TT |
10198 | ada_abs (struct type *expect_type, |
10199 | struct expression *exp, | |
10200 | enum noside noside, enum exp_opcode op, | |
10201 | struct value *arg1) | |
10202 | { | |
10203 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
d0c97917 | 10204 | if (value_less (arg1, value_zero (arg1->type (), not_lval))) |
d05e24e6 TT |
10205 | return value_neg (arg1); |
10206 | else | |
10207 | return arg1; | |
10208 | } | |
10209 | ||
faa1dfd7 TT |
10210 | /* A helper function for BINOP_MUL. */ |
10211 | ||
d9e7db06 | 10212 | value * |
faa1dfd7 TT |
10213 | ada_mult_binop (struct type *expect_type, |
10214 | struct expression *exp, | |
10215 | enum noside noside, enum exp_opcode op, | |
10216 | struct value *arg1, struct value *arg2) | |
10217 | { | |
10218 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10219 | { | |
10220 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
d0c97917 | 10221 | return value_zero (arg1->type (), not_lval); |
faa1dfd7 TT |
10222 | } |
10223 | else | |
10224 | { | |
10225 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10226 | return ada_value_binop (arg1, arg2, op); | |
10227 | } | |
10228 | } | |
10229 | ||
214b13ac TT |
10230 | /* A helper function for BINOP_EQUAL and BINOP_NOTEQUAL. */ |
10231 | ||
6e8fb7b7 | 10232 | value * |
214b13ac TT |
10233 | ada_equal_binop (struct type *expect_type, |
10234 | struct expression *exp, | |
10235 | enum noside noside, enum exp_opcode op, | |
10236 | struct value *arg1, struct value *arg2) | |
10237 | { | |
10238 | int tem; | |
10239 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10240 | tem = 0; | |
10241 | else | |
10242 | { | |
10243 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10244 | tem = ada_value_equal (arg1, arg2); | |
10245 | } | |
10246 | if (op == BINOP_NOTEQUAL) | |
10247 | tem = !tem; | |
10248 | struct type *type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10249 | return value_from_longest (type, (LONGEST) tem); | |
10250 | } | |
10251 | ||
5ce19db8 TT |
10252 | /* A helper function for TERNOP_SLICE. */ |
10253 | ||
1b1ebfab | 10254 | value * |
5ce19db8 TT |
10255 | ada_ternop_slice (struct expression *exp, |
10256 | enum noside noside, | |
10257 | struct value *array, struct value *low_bound_val, | |
10258 | struct value *high_bound_val) | |
10259 | { | |
10260 | LONGEST low_bound; | |
10261 | LONGEST high_bound; | |
10262 | ||
10263 | low_bound_val = coerce_ref (low_bound_val); | |
10264 | high_bound_val = coerce_ref (high_bound_val); | |
10265 | low_bound = value_as_long (low_bound_val); | |
10266 | high_bound = value_as_long (high_bound_val); | |
10267 | ||
10268 | /* If this is a reference to an aligner type, then remove all | |
10269 | the aligners. */ | |
d0c97917 TT |
10270 | if (array->type ()->code () == TYPE_CODE_REF |
10271 | && ada_is_aligner_type (array->type ()->target_type ())) | |
10272 | array->type ()->set_target_type | |
10273 | (ada_aligned_type (array->type ()->target_type ())); | |
5ce19db8 | 10274 | |
d0c97917 | 10275 | if (ada_is_any_packed_array_type (array->type ())) |
5ce19db8 TT |
10276 | error (_("cannot slice a packed array")); |
10277 | ||
10278 | /* If this is a reference to an array or an array lvalue, | |
10279 | convert to a pointer. */ | |
d0c97917 TT |
10280 | if (array->type ()->code () == TYPE_CODE_REF |
10281 | || (array->type ()->code () == TYPE_CODE_ARRAY | |
5ce19db8 TT |
10282 | && VALUE_LVAL (array) == lval_memory)) |
10283 | array = value_addr (array); | |
10284 | ||
10285 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
10286 | && ada_is_array_descriptor_type (ada_check_typedef | |
d0c97917 | 10287 | (array->type ()))) |
5ce19db8 TT |
10288 | return empty_array (ada_type_of_array (array, 0), low_bound, |
10289 | high_bound); | |
10290 | ||
10291 | array = ada_coerce_to_simple_array_ptr (array); | |
10292 | ||
10293 | /* If we have more than one level of pointer indirection, | |
10294 | dereference the value until we get only one level. */ | |
d0c97917 TT |
10295 | while (array->type ()->code () == TYPE_CODE_PTR |
10296 | && (array->type ()->target_type ()->code () | |
5ce19db8 TT |
10297 | == TYPE_CODE_PTR)) |
10298 | array = value_ind (array); | |
10299 | ||
10300 | /* Make sure we really do have an array type before going further, | |
10301 | to avoid a SEGV when trying to get the index type or the target | |
10302 | type later down the road if the debug info generated by | |
10303 | the compiler is incorrect or incomplete. */ | |
d0c97917 | 10304 | if (!ada_is_simple_array_type (array->type ())) |
5ce19db8 TT |
10305 | error (_("cannot take slice of non-array")); |
10306 | ||
d0c97917 | 10307 | if (ada_check_typedef (array->type ())->code () |
5ce19db8 TT |
10308 | == TYPE_CODE_PTR) |
10309 | { | |
d0c97917 | 10310 | struct type *type0 = ada_check_typedef (array->type ()); |
5ce19db8 TT |
10311 | |
10312 | if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS) | |
27710edb | 10313 | return empty_array (type0->target_type (), low_bound, high_bound); |
5ce19db8 TT |
10314 | else |
10315 | { | |
10316 | struct type *arr_type0 = | |
27710edb | 10317 | to_fixed_array_type (type0->target_type (), NULL, 1); |
5ce19db8 TT |
10318 | |
10319 | return ada_value_slice_from_ptr (array, arr_type0, | |
10320 | longest_to_int (low_bound), | |
10321 | longest_to_int (high_bound)); | |
10322 | } | |
10323 | } | |
10324 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10325 | return array; | |
10326 | else if (high_bound < low_bound) | |
d0c97917 | 10327 | return empty_array (array->type (), low_bound, high_bound); |
5ce19db8 TT |
10328 | else |
10329 | return ada_value_slice (array, longest_to_int (low_bound), | |
10330 | longest_to_int (high_bound)); | |
10331 | } | |
10332 | ||
b467efaa TT |
10333 | /* A helper function for BINOP_IN_BOUNDS. */ |
10334 | ||
82c3886e | 10335 | value * |
b467efaa TT |
10336 | ada_binop_in_bounds (struct expression *exp, enum noside noside, |
10337 | struct value *arg1, struct value *arg2, int n) | |
10338 | { | |
10339 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10340 | { | |
10341 | struct type *type = language_bool_type (exp->language_defn, | |
10342 | exp->gdbarch); | |
10343 | return value_zero (type, not_lval); | |
10344 | } | |
10345 | ||
d0c97917 | 10346 | struct type *type = ada_index_type (arg2->type (), n, "range"); |
b467efaa | 10347 | if (!type) |
d0c97917 | 10348 | type = arg1->type (); |
b467efaa TT |
10349 | |
10350 | value *arg3 = value_from_longest (type, ada_array_bound (arg2, n, 1)); | |
10351 | arg2 = value_from_longest (type, ada_array_bound (arg2, n, 0)); | |
10352 | ||
10353 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10354 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
10355 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10356 | return value_from_longest (type, | |
10357 | (value_less (arg1, arg3) | |
10358 | || value_equal (arg1, arg3)) | |
10359 | && (value_less (arg2, arg1) | |
10360 | || value_equal (arg2, arg1))); | |
10361 | } | |
10362 | ||
b84564fc TT |
10363 | /* A helper function for some attribute operations. */ |
10364 | ||
10365 | static value * | |
10366 | ada_unop_atr (struct expression *exp, enum noside noside, enum exp_opcode op, | |
10367 | struct value *arg1, struct type *type_arg, int tem) | |
10368 | { | |
10369 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10370 | { | |
10371 | if (type_arg == NULL) | |
d0c97917 | 10372 | type_arg = arg1->type (); |
b84564fc TT |
10373 | |
10374 | if (ada_is_constrained_packed_array_type (type_arg)) | |
10375 | type_arg = decode_constrained_packed_array_type (type_arg); | |
10376 | ||
10377 | if (!discrete_type_p (type_arg)) | |
10378 | { | |
10379 | switch (op) | |
10380 | { | |
10381 | default: /* Should never happen. */ | |
10382 | error (_("unexpected attribute encountered")); | |
10383 | case OP_ATR_FIRST: | |
10384 | case OP_ATR_LAST: | |
10385 | type_arg = ada_index_type (type_arg, tem, | |
10386 | ada_attribute_name (op)); | |
10387 | break; | |
10388 | case OP_ATR_LENGTH: | |
10389 | type_arg = builtin_type (exp->gdbarch)->builtin_int; | |
10390 | break; | |
10391 | } | |
10392 | } | |
10393 | ||
10394 | return value_zero (type_arg, not_lval); | |
10395 | } | |
10396 | else if (type_arg == NULL) | |
10397 | { | |
10398 | arg1 = ada_coerce_ref (arg1); | |
10399 | ||
d0c97917 | 10400 | if (ada_is_constrained_packed_array_type (arg1->type ())) |
b84564fc TT |
10401 | arg1 = ada_coerce_to_simple_array (arg1); |
10402 | ||
10403 | struct type *type; | |
10404 | if (op == OP_ATR_LENGTH) | |
10405 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10406 | else | |
10407 | { | |
d0c97917 | 10408 | type = ada_index_type (arg1->type (), tem, |
b84564fc TT |
10409 | ada_attribute_name (op)); |
10410 | if (type == NULL) | |
10411 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10412 | } | |
10413 | ||
10414 | switch (op) | |
10415 | { | |
10416 | default: /* Should never happen. */ | |
10417 | error (_("unexpected attribute encountered")); | |
10418 | case OP_ATR_FIRST: | |
10419 | return value_from_longest | |
10420 | (type, ada_array_bound (arg1, tem, 0)); | |
10421 | case OP_ATR_LAST: | |
10422 | return value_from_longest | |
10423 | (type, ada_array_bound (arg1, tem, 1)); | |
10424 | case OP_ATR_LENGTH: | |
10425 | return value_from_longest | |
10426 | (type, ada_array_length (arg1, tem)); | |
10427 | } | |
10428 | } | |
10429 | else if (discrete_type_p (type_arg)) | |
10430 | { | |
10431 | struct type *range_type; | |
10432 | const char *name = ada_type_name (type_arg); | |
10433 | ||
10434 | range_type = NULL; | |
10435 | if (name != NULL && type_arg->code () != TYPE_CODE_ENUM) | |
10436 | range_type = to_fixed_range_type (type_arg, NULL); | |
10437 | if (range_type == NULL) | |
10438 | range_type = type_arg; | |
10439 | switch (op) | |
10440 | { | |
10441 | default: | |
10442 | error (_("unexpected attribute encountered")); | |
10443 | case OP_ATR_FIRST: | |
10444 | return value_from_longest | |
10445 | (range_type, ada_discrete_type_low_bound (range_type)); | |
10446 | case OP_ATR_LAST: | |
10447 | return value_from_longest | |
10448 | (range_type, ada_discrete_type_high_bound (range_type)); | |
10449 | case OP_ATR_LENGTH: | |
10450 | error (_("the 'length attribute applies only to array types")); | |
10451 | } | |
10452 | } | |
10453 | else if (type_arg->code () == TYPE_CODE_FLT) | |
10454 | error (_("unimplemented type attribute")); | |
10455 | else | |
10456 | { | |
10457 | LONGEST low, high; | |
10458 | ||
10459 | if (ada_is_constrained_packed_array_type (type_arg)) | |
10460 | type_arg = decode_constrained_packed_array_type (type_arg); | |
10461 | ||
10462 | struct type *type; | |
10463 | if (op == OP_ATR_LENGTH) | |
10464 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10465 | else | |
10466 | { | |
10467 | type = ada_index_type (type_arg, tem, ada_attribute_name (op)); | |
10468 | if (type == NULL) | |
10469 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10470 | } | |
10471 | ||
10472 | switch (op) | |
10473 | { | |
10474 | default: | |
10475 | error (_("unexpected attribute encountered")); | |
10476 | case OP_ATR_FIRST: | |
10477 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10478 | return value_from_longest (type, low); | |
10479 | case OP_ATR_LAST: | |
10480 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10481 | return value_from_longest (type, high); | |
10482 | case OP_ATR_LENGTH: | |
10483 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10484 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10485 | return value_from_longest (type, high - low + 1); | |
10486 | } | |
10487 | } | |
10488 | } | |
10489 | ||
38dc70cf TT |
10490 | /* A helper function for OP_ATR_MIN and OP_ATR_MAX. */ |
10491 | ||
6ad3b8bf | 10492 | struct value * |
38dc70cf TT |
10493 | ada_binop_minmax (struct type *expect_type, |
10494 | struct expression *exp, | |
10495 | enum noside noside, enum exp_opcode op, | |
10496 | struct value *arg1, struct value *arg2) | |
10497 | { | |
10498 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
d0c97917 | 10499 | return value_zero (arg1->type (), not_lval); |
38dc70cf TT |
10500 | else |
10501 | { | |
10502 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
0922dc84 | 10503 | return value_binop (arg1, arg2, op); |
38dc70cf TT |
10504 | } |
10505 | } | |
10506 | ||
dd5fd283 TT |
10507 | /* A helper function for BINOP_EXP. */ |
10508 | ||
065ec826 | 10509 | struct value * |
dd5fd283 TT |
10510 | ada_binop_exp (struct type *expect_type, |
10511 | struct expression *exp, | |
10512 | enum noside noside, enum exp_opcode op, | |
10513 | struct value *arg1, struct value *arg2) | |
10514 | { | |
10515 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
d0c97917 | 10516 | return value_zero (arg1->type (), not_lval); |
dd5fd283 TT |
10517 | else |
10518 | { | |
10519 | /* For integer exponentiation operations, | |
10520 | only promote the first argument. */ | |
d0c97917 | 10521 | if (is_integral_type (arg2->type ())) |
dd5fd283 TT |
10522 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); |
10523 | else | |
10524 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10525 | ||
10526 | return value_binop (arg1, arg2, op); | |
10527 | } | |
10528 | } | |
10529 | ||
03070ee9 TT |
10530 | namespace expr |
10531 | { | |
10532 | ||
8b12db26 TT |
10533 | /* See ada-exp.h. */ |
10534 | ||
10535 | operation_up | |
10536 | ada_resolvable::replace (operation_up &&owner, | |
10537 | struct expression *exp, | |
10538 | bool deprocedure_p, | |
10539 | bool parse_completion, | |
10540 | innermost_block_tracker *tracker, | |
10541 | struct type *context_type) | |
10542 | { | |
10543 | if (resolve (exp, deprocedure_p, parse_completion, tracker, context_type)) | |
10544 | return (make_operation<ada_funcall_operation> | |
10545 | (std::move (owner), | |
10546 | std::vector<operation_up> ())); | |
10547 | return std::move (owner); | |
10548 | } | |
10549 | ||
c9f66f00 | 10550 | /* Convert the character literal whose value would be VAL to the |
03adb248 TT |
10551 | appropriate value of type TYPE, if there is a translation. |
10552 | Otherwise return VAL. Hence, in an enumeration type ('A', 'B'), | |
10553 | the literal 'A' (VAL == 65), returns 0. */ | |
10554 | ||
10555 | static LONGEST | |
10556 | convert_char_literal (struct type *type, LONGEST val) | |
10557 | { | |
c9f66f00 | 10558 | char name[12]; |
03adb248 TT |
10559 | int f; |
10560 | ||
10561 | if (type == NULL) | |
10562 | return val; | |
10563 | type = check_typedef (type); | |
10564 | if (type->code () != TYPE_CODE_ENUM) | |
10565 | return val; | |
10566 | ||
10567 | if ((val >= 'a' && val <= 'z') || (val >= '0' && val <= '9')) | |
10568 | xsnprintf (name, sizeof (name), "Q%c", (int) val); | |
c9f66f00 TT |
10569 | else if (val >= 0 && val < 256) |
10570 | xsnprintf (name, sizeof (name), "QU%02x", (unsigned) val); | |
10571 | else if (val >= 0 && val < 0x10000) | |
10572 | xsnprintf (name, sizeof (name), "QW%04x", (unsigned) val); | |
03adb248 | 10573 | else |
c9f66f00 | 10574 | xsnprintf (name, sizeof (name), "QWW%08lx", (unsigned long) val); |
03adb248 TT |
10575 | size_t len = strlen (name); |
10576 | for (f = 0; f < type->num_fields (); f += 1) | |
10577 | { | |
10578 | /* Check the suffix because an enum constant in a package will | |
10579 | have a name like "pkg__QUxx". This is safe enough because we | |
10580 | already have the correct type, and because mangling means | |
10581 | there can't be clashes. */ | |
33d16dd9 | 10582 | const char *ename = type->field (f).name (); |
03adb248 TT |
10583 | size_t elen = strlen (ename); |
10584 | ||
10585 | if (elen >= len && strcmp (name, ename + elen - len) == 0) | |
970db518 | 10586 | return type->field (f).loc_enumval (); |
03adb248 TT |
10587 | } |
10588 | return val; | |
10589 | } | |
10590 | ||
b1b9c411 TT |
10591 | value * |
10592 | ada_char_operation::evaluate (struct type *expect_type, | |
10593 | struct expression *exp, | |
10594 | enum noside noside) | |
10595 | { | |
10596 | value *result = long_const_operation::evaluate (expect_type, exp, noside); | |
10597 | if (expect_type != nullptr) | |
10598 | result = ada_value_cast (expect_type, result); | |
10599 | return result; | |
10600 | } | |
10601 | ||
03adb248 TT |
10602 | /* See ada-exp.h. */ |
10603 | ||
10604 | operation_up | |
10605 | ada_char_operation::replace (operation_up &&owner, | |
10606 | struct expression *exp, | |
10607 | bool deprocedure_p, | |
10608 | bool parse_completion, | |
10609 | innermost_block_tracker *tracker, | |
10610 | struct type *context_type) | |
10611 | { | |
10612 | operation_up result = std::move (owner); | |
10613 | ||
10614 | if (context_type != nullptr && context_type->code () == TYPE_CODE_ENUM) | |
10615 | { | |
10616 | gdb_assert (result.get () == this); | |
10617 | std::get<0> (m_storage) = context_type; | |
10618 | std::get<1> (m_storage) | |
10619 | = convert_char_literal (context_type, std::get<1> (m_storage)); | |
10620 | } | |
10621 | ||
b1b9c411 | 10622 | return result; |
03adb248 TT |
10623 | } |
10624 | ||
03070ee9 TT |
10625 | value * |
10626 | ada_wrapped_operation::evaluate (struct type *expect_type, | |
10627 | struct expression *exp, | |
10628 | enum noside noside) | |
10629 | { | |
10630 | value *result = std::get<0> (m_storage)->evaluate (expect_type, exp, noside); | |
10631 | if (noside == EVAL_NORMAL) | |
10632 | result = unwrap_value (result); | |
10633 | ||
10634 | /* If evaluating an OP_FLOAT and an EXPECT_TYPE was provided, | |
10635 | then we need to perform the conversion manually, because | |
10636 | evaluate_subexp_standard doesn't do it. This conversion is | |
10637 | necessary in Ada because the different kinds of float/fixed | |
10638 | types in Ada have different representations. | |
10639 | ||
10640 | Similarly, we need to perform the conversion from OP_LONG | |
10641 | ourselves. */ | |
10642 | if ((opcode () == OP_FLOAT || opcode () == OP_LONG) && expect_type != NULL) | |
10643 | result = ada_value_cast (expect_type, result); | |
10644 | ||
10645 | return result; | |
10646 | } | |
10647 | ||
42fecb61 TT |
10648 | value * |
10649 | ada_string_operation::evaluate (struct type *expect_type, | |
10650 | struct expression *exp, | |
10651 | enum noside noside) | |
10652 | { | |
fc18a21b TT |
10653 | struct type *char_type; |
10654 | if (expect_type != nullptr && ada_is_string_type (expect_type)) | |
10655 | char_type = ada_array_element_type (expect_type, 1); | |
10656 | else | |
10657 | char_type = language_string_char_type (exp->language_defn, exp->gdbarch); | |
10658 | ||
10659 | const std::string &str = std::get<0> (m_storage); | |
10660 | const char *encoding; | |
df86565b | 10661 | switch (char_type->length ()) |
fc18a21b TT |
10662 | { |
10663 | case 1: | |
10664 | { | |
10665 | /* Simply copy over the data -- this isn't perhaps strictly | |
10666 | correct according to the encodings, but it is gdb's | |
10667 | historical behavior. */ | |
10668 | struct type *stringtype | |
10669 | = lookup_array_range_type (char_type, 1, str.length ()); | |
10670 | struct value *val = allocate_value (stringtype); | |
10671 | memcpy (value_contents_raw (val).data (), str.c_str (), | |
10672 | str.length ()); | |
10673 | return val; | |
10674 | } | |
10675 | ||
10676 | case 2: | |
10677 | if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG) | |
10678 | encoding = "UTF-16BE"; | |
10679 | else | |
10680 | encoding = "UTF-16LE"; | |
10681 | break; | |
10682 | ||
10683 | case 4: | |
10684 | if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG) | |
10685 | encoding = "UTF-32BE"; | |
10686 | else | |
10687 | encoding = "UTF-32LE"; | |
10688 | break; | |
10689 | ||
10690 | default: | |
10691 | error (_("unexpected character type size %s"), | |
df86565b | 10692 | pulongest (char_type->length ())); |
fc18a21b TT |
10693 | } |
10694 | ||
10695 | auto_obstack converted; | |
10696 | convert_between_encodings (host_charset (), encoding, | |
10697 | (const gdb_byte *) str.c_str (), | |
10698 | str.length (), 1, | |
10699 | &converted, translit_none); | |
10700 | ||
10701 | struct type *stringtype | |
10702 | = lookup_array_range_type (char_type, 1, | |
10703 | obstack_object_size (&converted) | |
df86565b | 10704 | / char_type->length ()); |
fc18a21b TT |
10705 | struct value *val = allocate_value (stringtype); |
10706 | memcpy (value_contents_raw (val).data (), | |
10707 | obstack_base (&converted), | |
10708 | obstack_object_size (&converted)); | |
10709 | return val; | |
42fecb61 TT |
10710 | } |
10711 | ||
b1b9c411 TT |
10712 | value * |
10713 | ada_concat_operation::evaluate (struct type *expect_type, | |
10714 | struct expression *exp, | |
10715 | enum noside noside) | |
10716 | { | |
10717 | /* If one side is a literal, evaluate the other side first so that | |
10718 | the expected type can be set properly. */ | |
10719 | const operation_up &lhs_expr = std::get<0> (m_storage); | |
10720 | const operation_up &rhs_expr = std::get<1> (m_storage); | |
10721 | ||
10722 | value *lhs, *rhs; | |
10723 | if (dynamic_cast<ada_string_operation *> (lhs_expr.get ()) != nullptr) | |
10724 | { | |
10725 | rhs = rhs_expr->evaluate (nullptr, exp, noside); | |
d0c97917 | 10726 | lhs = lhs_expr->evaluate (rhs->type (), exp, noside); |
b1b9c411 TT |
10727 | } |
10728 | else if (dynamic_cast<ada_char_operation *> (lhs_expr.get ()) != nullptr) | |
10729 | { | |
10730 | rhs = rhs_expr->evaluate (nullptr, exp, noside); | |
d0c97917 | 10731 | struct type *rhs_type = check_typedef (rhs->type ()); |
b1b9c411 TT |
10732 | struct type *elt_type = nullptr; |
10733 | if (rhs_type->code () == TYPE_CODE_ARRAY) | |
27710edb | 10734 | elt_type = rhs_type->target_type (); |
b1b9c411 TT |
10735 | lhs = lhs_expr->evaluate (elt_type, exp, noside); |
10736 | } | |
10737 | else if (dynamic_cast<ada_string_operation *> (rhs_expr.get ()) != nullptr) | |
10738 | { | |
10739 | lhs = lhs_expr->evaluate (nullptr, exp, noside); | |
d0c97917 | 10740 | rhs = rhs_expr->evaluate (lhs->type (), exp, noside); |
b1b9c411 TT |
10741 | } |
10742 | else if (dynamic_cast<ada_char_operation *> (rhs_expr.get ()) != nullptr) | |
10743 | { | |
10744 | lhs = lhs_expr->evaluate (nullptr, exp, noside); | |
d0c97917 | 10745 | struct type *lhs_type = check_typedef (lhs->type ()); |
b1b9c411 TT |
10746 | struct type *elt_type = nullptr; |
10747 | if (lhs_type->code () == TYPE_CODE_ARRAY) | |
27710edb | 10748 | elt_type = lhs_type->target_type (); |
b1b9c411 TT |
10749 | rhs = rhs_expr->evaluate (elt_type, exp, noside); |
10750 | } | |
10751 | else | |
10752 | return concat_operation::evaluate (expect_type, exp, noside); | |
10753 | ||
10754 | return value_concat (lhs, rhs); | |
10755 | } | |
10756 | ||
cc6bd32e TT |
10757 | value * |
10758 | ada_qual_operation::evaluate (struct type *expect_type, | |
10759 | struct expression *exp, | |
10760 | enum noside noside) | |
10761 | { | |
10762 | struct type *type = std::get<1> (m_storage); | |
10763 | return std::get<0> (m_storage)->evaluate (type, exp, noside); | |
10764 | } | |
10765 | ||
fc715eb2 TT |
10766 | value * |
10767 | ada_ternop_range_operation::evaluate (struct type *expect_type, | |
10768 | struct expression *exp, | |
10769 | enum noside noside) | |
10770 | { | |
10771 | value *arg0 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
10772 | value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
10773 | value *arg2 = std::get<2> (m_storage)->evaluate (nullptr, exp, noside); | |
10774 | return eval_ternop_in_range (expect_type, exp, noside, arg0, arg1, arg2); | |
10775 | } | |
10776 | ||
73796c73 TT |
10777 | value * |
10778 | ada_binop_addsub_operation::evaluate (struct type *expect_type, | |
10779 | struct expression *exp, | |
10780 | enum noside noside) | |
10781 | { | |
10782 | value *arg1 = std::get<1> (m_storage)->evaluate_with_coercion (exp, noside); | |
10783 | value *arg2 = std::get<2> (m_storage)->evaluate_with_coercion (exp, noside); | |
10784 | ||
10785 | auto do_op = [=] (LONGEST x, LONGEST y) | |
10786 | { | |
10787 | if (std::get<0> (m_storage) == BINOP_ADD) | |
10788 | return x + y; | |
10789 | return x - y; | |
10790 | }; | |
10791 | ||
d0c97917 | 10792 | if (arg1->type ()->code () == TYPE_CODE_PTR) |
73796c73 | 10793 | return (value_from_longest |
d0c97917 | 10794 | (arg1->type (), |
73796c73 | 10795 | do_op (value_as_long (arg1), value_as_long (arg2)))); |
d0c97917 | 10796 | if (arg2->type ()->code () == TYPE_CODE_PTR) |
73796c73 | 10797 | return (value_from_longest |
d0c97917 | 10798 | (arg2->type (), |
73796c73 TT |
10799 | do_op (value_as_long (arg1), value_as_long (arg2)))); |
10800 | /* Preserve the original type for use by the range case below. | |
10801 | We cannot cast the result to a reference type, so if ARG1 is | |
10802 | a reference type, find its underlying type. */ | |
d0c97917 | 10803 | struct type *type = arg1->type (); |
73796c73 | 10804 | while (type->code () == TYPE_CODE_REF) |
27710edb | 10805 | type = type->target_type (); |
73796c73 TT |
10806 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10807 | arg1 = value_binop (arg1, arg2, std::get<0> (m_storage)); | |
10808 | /* We need to special-case the result with a range. | |
10809 | This is done for the benefit of "ptype". gdb's Ada support | |
10810 | historically used the LHS to set the result type here, so | |
10811 | preserve this behavior. */ | |
10812 | if (type->code () == TYPE_CODE_RANGE) | |
10813 | arg1 = value_cast (type, arg1); | |
10814 | return arg1; | |
10815 | } | |
10816 | ||
60fa02ca TT |
10817 | value * |
10818 | ada_unop_atr_operation::evaluate (struct type *expect_type, | |
10819 | struct expression *exp, | |
10820 | enum noside noside) | |
10821 | { | |
10822 | struct type *type_arg = nullptr; | |
10823 | value *val = nullptr; | |
10824 | ||
10825 | if (std::get<0> (m_storage)->opcode () == OP_TYPE) | |
10826 | { | |
10827 | value *tem = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
10828 | EVAL_AVOID_SIDE_EFFECTS); | |
d0c97917 | 10829 | type_arg = tem->type (); |
60fa02ca TT |
10830 | } |
10831 | else | |
10832 | val = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
10833 | ||
10834 | return ada_unop_atr (exp, noside, std::get<1> (m_storage), | |
10835 | val, type_arg, std::get<2> (m_storage)); | |
10836 | } | |
10837 | ||
3f4a0053 TT |
10838 | value * |
10839 | ada_var_msym_value_operation::evaluate_for_cast (struct type *expect_type, | |
10840 | struct expression *exp, | |
10841 | enum noside noside) | |
10842 | { | |
10843 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10844 | return value_zero (expect_type, not_lval); | |
10845 | ||
9c79936b TT |
10846 | const bound_minimal_symbol &b = std::get<0> (m_storage); |
10847 | value *val = evaluate_var_msym_value (noside, b.objfile, b.minsym); | |
3f4a0053 TT |
10848 | |
10849 | val = ada_value_cast (expect_type, val); | |
10850 | ||
10851 | /* Follow the Ada language semantics that do not allow taking | |
10852 | an address of the result of a cast (view conversion in Ada). */ | |
10853 | if (VALUE_LVAL (val) == lval_memory) | |
10854 | { | |
3ee3b270 | 10855 | if (val->lazy ()) |
3f4a0053 TT |
10856 | value_fetch_lazy (val); |
10857 | VALUE_LVAL (val) = not_lval; | |
10858 | } | |
10859 | return val; | |
10860 | } | |
10861 | ||
99a3b1e7 TT |
10862 | value * |
10863 | ada_var_value_operation::evaluate_for_cast (struct type *expect_type, | |
10864 | struct expression *exp, | |
10865 | enum noside noside) | |
10866 | { | |
10867 | value *val = evaluate_var_value (noside, | |
9e5e03df TT |
10868 | std::get<0> (m_storage).block, |
10869 | std::get<0> (m_storage).symbol); | |
99a3b1e7 TT |
10870 | |
10871 | val = ada_value_cast (expect_type, val); | |
10872 | ||
10873 | /* Follow the Ada language semantics that do not allow taking | |
10874 | an address of the result of a cast (view conversion in Ada). */ | |
10875 | if (VALUE_LVAL (val) == lval_memory) | |
10876 | { | |
3ee3b270 | 10877 | if (val->lazy ()) |
99a3b1e7 TT |
10878 | value_fetch_lazy (val); |
10879 | VALUE_LVAL (val) = not_lval; | |
10880 | } | |
10881 | return val; | |
10882 | } | |
10883 | ||
10884 | value * | |
10885 | ada_var_value_operation::evaluate (struct type *expect_type, | |
10886 | struct expression *exp, | |
10887 | enum noside noside) | |
10888 | { | |
9e5e03df | 10889 | symbol *sym = std::get<0> (m_storage).symbol; |
99a3b1e7 | 10890 | |
6c9c307c | 10891 | if (sym->domain () == UNDEF_DOMAIN) |
99a3b1e7 TT |
10892 | /* Only encountered when an unresolved symbol occurs in a |
10893 | context other than a function call, in which case, it is | |
10894 | invalid. */ | |
10895 | error (_("Unexpected unresolved symbol, %s, during evaluation"), | |
10896 | sym->print_name ()); | |
10897 | ||
10898 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10899 | { | |
5f9c5a63 | 10900 | struct type *type = static_unwrap_type (sym->type ()); |
99a3b1e7 TT |
10901 | /* Check to see if this is a tagged type. We also need to handle |
10902 | the case where the type is a reference to a tagged type, but | |
10903 | we have to be careful to exclude pointers to tagged types. | |
10904 | The latter should be shown as usual (as a pointer), whereas | |
10905 | a reference should mostly be transparent to the user. */ | |
10906 | if (ada_is_tagged_type (type, 0) | |
10907 | || (type->code () == TYPE_CODE_REF | |
27710edb | 10908 | && ada_is_tagged_type (type->target_type (), 0))) |
99a3b1e7 TT |
10909 | { |
10910 | /* Tagged types are a little special in the fact that the real | |
10911 | type is dynamic and can only be determined by inspecting the | |
10912 | object's tag. This means that we need to get the object's | |
10913 | value first (EVAL_NORMAL) and then extract the actual object | |
10914 | type from its tag. | |
10915 | ||
10916 | Note that we cannot skip the final step where we extract | |
10917 | the object type from its tag, because the EVAL_NORMAL phase | |
10918 | results in dynamic components being resolved into fixed ones. | |
10919 | This can cause problems when trying to print the type | |
10920 | description of tagged types whose parent has a dynamic size: | |
10921 | We use the type name of the "_parent" component in order | |
10922 | to print the name of the ancestor type in the type description. | |
10923 | If that component had a dynamic size, the resolution into | |
10924 | a fixed type would result in the loss of that type name, | |
10925 | thus preventing us from printing the name of the ancestor | |
10926 | type in the type description. */ | |
9863c3b5 | 10927 | value *arg1 = evaluate (nullptr, exp, EVAL_NORMAL); |
99a3b1e7 TT |
10928 | |
10929 | if (type->code () != TYPE_CODE_REF) | |
10930 | { | |
10931 | struct type *actual_type; | |
10932 | ||
10933 | actual_type = type_from_tag (ada_value_tag (arg1)); | |
10934 | if (actual_type == NULL) | |
10935 | /* If, for some reason, we were unable to determine | |
10936 | the actual type from the tag, then use the static | |
10937 | approximation that we just computed as a fallback. | |
10938 | This can happen if the debugging information is | |
10939 | incomplete, for instance. */ | |
10940 | actual_type = type; | |
10941 | return value_zero (actual_type, not_lval); | |
10942 | } | |
10943 | else | |
10944 | { | |
10945 | /* In the case of a ref, ada_coerce_ref takes care | |
10946 | of determining the actual type. But the evaluation | |
10947 | should return a ref as it should be valid to ask | |
10948 | for its address; so rebuild a ref after coerce. */ | |
10949 | arg1 = ada_coerce_ref (arg1); | |
10950 | return value_ref (arg1, TYPE_CODE_REF); | |
10951 | } | |
10952 | } | |
10953 | ||
10954 | /* Records and unions for which GNAT encodings have been | |
10955 | generated need to be statically fixed as well. | |
10956 | Otherwise, non-static fixing produces a type where | |
10957 | all dynamic properties are removed, which prevents "ptype" | |
10958 | from being able to completely describe the type. | |
10959 | For instance, a case statement in a variant record would be | |
10960 | replaced by the relevant components based on the actual | |
10961 | value of the discriminants. */ | |
10962 | if ((type->code () == TYPE_CODE_STRUCT | |
10963 | && dynamic_template_type (type) != NULL) | |
10964 | || (type->code () == TYPE_CODE_UNION | |
10965 | && ada_find_parallel_type (type, "___XVU") != NULL)) | |
10966 | return value_zero (to_static_fixed_type (type), not_lval); | |
10967 | } | |
10968 | ||
10969 | value *arg1 = var_value_operation::evaluate (expect_type, exp, noside); | |
10970 | return ada_to_fixed_value (arg1); | |
10971 | } | |
10972 | ||
d8a4ed8a TT |
10973 | bool |
10974 | ada_var_value_operation::resolve (struct expression *exp, | |
10975 | bool deprocedure_p, | |
10976 | bool parse_completion, | |
10977 | innermost_block_tracker *tracker, | |
10978 | struct type *context_type) | |
10979 | { | |
9e5e03df | 10980 | symbol *sym = std::get<0> (m_storage).symbol; |
6c9c307c | 10981 | if (sym->domain () == UNDEF_DOMAIN) |
d8a4ed8a TT |
10982 | { |
10983 | block_symbol resolved | |
9e5e03df | 10984 | = ada_resolve_variable (sym, std::get<0> (m_storage).block, |
d8a4ed8a TT |
10985 | context_type, parse_completion, |
10986 | deprocedure_p, tracker); | |
9e5e03df | 10987 | std::get<0> (m_storage) = resolved; |
d8a4ed8a TT |
10988 | } |
10989 | ||
10990 | if (deprocedure_p | |
5f9c5a63 | 10991 | && (std::get<0> (m_storage).symbol->type ()->code () |
9e5e03df | 10992 | == TYPE_CODE_FUNC)) |
d8a4ed8a TT |
10993 | return true; |
10994 | ||
10995 | return false; | |
10996 | } | |
10997 | ||
9e99f48f TT |
10998 | value * |
10999 | ada_atr_val_operation::evaluate (struct type *expect_type, | |
11000 | struct expression *exp, | |
11001 | enum noside noside) | |
11002 | { | |
11003 | value *arg = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
11004 | return ada_val_atr (noside, std::get<0> (m_storage), arg); | |
11005 | } | |
11006 | ||
e8c33fa1 TT |
11007 | value * |
11008 | ada_unop_ind_operation::evaluate (struct type *expect_type, | |
11009 | struct expression *exp, | |
11010 | enum noside noside) | |
11011 | { | |
11012 | value *arg1 = std::get<0> (m_storage)->evaluate (expect_type, exp, noside); | |
11013 | ||
d0c97917 | 11014 | struct type *type = ada_check_typedef (arg1->type ()); |
e8c33fa1 TT |
11015 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
11016 | { | |
11017 | if (ada_is_array_descriptor_type (type)) | |
11018 | /* GDB allows dereferencing GNAT array descriptors. */ | |
11019 | { | |
11020 | struct type *arrType = ada_type_of_array (arg1, 0); | |
11021 | ||
11022 | if (arrType == NULL) | |
11023 | error (_("Attempt to dereference null array pointer.")); | |
11024 | return value_at_lazy (arrType, 0); | |
11025 | } | |
11026 | else if (type->code () == TYPE_CODE_PTR | |
11027 | || type->code () == TYPE_CODE_REF | |
11028 | /* In C you can dereference an array to get the 1st elt. */ | |
11029 | || type->code () == TYPE_CODE_ARRAY) | |
11030 | { | |
11031 | /* As mentioned in the OP_VAR_VALUE case, tagged types can | |
11032 | only be determined by inspecting the object's tag. | |
11033 | This means that we need to evaluate completely the | |
11034 | expression in order to get its type. */ | |
11035 | ||
11036 | if ((type->code () == TYPE_CODE_REF | |
11037 | || type->code () == TYPE_CODE_PTR) | |
27710edb | 11038 | && ada_is_tagged_type (type->target_type (), 0)) |
e8c33fa1 TT |
11039 | { |
11040 | arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
11041 | EVAL_NORMAL); | |
d0c97917 | 11042 | type = ada_value_ind (arg1)->type (); |
e8c33fa1 TT |
11043 | } |
11044 | else | |
11045 | { | |
11046 | type = to_static_fixed_type | |
11047 | (ada_aligned_type | |
27710edb | 11048 | (ada_check_typedef (type->target_type ()))); |
e8c33fa1 | 11049 | } |
e8c33fa1 TT |
11050 | return value_zero (type, lval_memory); |
11051 | } | |
11052 | else if (type->code () == TYPE_CODE_INT) | |
11053 | { | |
11054 | /* GDB allows dereferencing an int. */ | |
11055 | if (expect_type == NULL) | |
11056 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
11057 | lval_memory); | |
11058 | else | |
11059 | { | |
11060 | expect_type = | |
11061 | to_static_fixed_type (ada_aligned_type (expect_type)); | |
11062 | return value_zero (expect_type, lval_memory); | |
11063 | } | |
11064 | } | |
11065 | else | |
11066 | error (_("Attempt to take contents of a non-pointer value.")); | |
11067 | } | |
11068 | arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */ | |
d0c97917 | 11069 | type = ada_check_typedef (arg1->type ()); |
e8c33fa1 TT |
11070 | |
11071 | if (type->code () == TYPE_CODE_INT) | |
11072 | /* GDB allows dereferencing an int. If we were given | |
11073 | the expect_type, then use that as the target type. | |
11074 | Otherwise, assume that the target type is an int. */ | |
11075 | { | |
11076 | if (expect_type != NULL) | |
11077 | return ada_value_ind (value_cast (lookup_pointer_type (expect_type), | |
11078 | arg1)); | |
11079 | else | |
11080 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, | |
11081 | (CORE_ADDR) value_as_address (arg1)); | |
11082 | } | |
11083 | ||
11084 | if (ada_is_array_descriptor_type (type)) | |
11085 | /* GDB allows dereferencing GNAT array descriptors. */ | |
11086 | return ada_coerce_to_simple_array (arg1); | |
11087 | else | |
11088 | return ada_value_ind (arg1); | |
11089 | } | |
11090 | ||
ebc06ad8 TT |
11091 | value * |
11092 | ada_structop_operation::evaluate (struct type *expect_type, | |
11093 | struct expression *exp, | |
11094 | enum noside noside) | |
11095 | { | |
11096 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
11097 | const char *str = std::get<1> (m_storage).c_str (); | |
11098 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
11099 | { | |
11100 | struct type *type; | |
d0c97917 | 11101 | struct type *type1 = arg1->type (); |
ebc06ad8 TT |
11102 | |
11103 | if (ada_is_tagged_type (type1, 1)) | |
11104 | { | |
11105 | type = ada_lookup_struct_elt_type (type1, str, 1, 1); | |
11106 | ||
11107 | /* If the field is not found, check if it exists in the | |
11108 | extension of this object's type. This means that we | |
11109 | need to evaluate completely the expression. */ | |
11110 | ||
11111 | if (type == NULL) | |
11112 | { | |
11113 | arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
11114 | EVAL_NORMAL); | |
11115 | arg1 = ada_value_struct_elt (arg1, str, 0); | |
11116 | arg1 = unwrap_value (arg1); | |
d0c97917 | 11117 | type = ada_to_fixed_value (arg1)->type (); |
ebc06ad8 TT |
11118 | } |
11119 | } | |
11120 | else | |
11121 | type = ada_lookup_struct_elt_type (type1, str, 1, 0); | |
11122 | ||
11123 | return value_zero (ada_aligned_type (type), lval_memory); | |
11124 | } | |
11125 | else | |
11126 | { | |
11127 | arg1 = ada_value_struct_elt (arg1, str, 0); | |
11128 | arg1 = unwrap_value (arg1); | |
11129 | return ada_to_fixed_value (arg1); | |
11130 | } | |
11131 | } | |
11132 | ||
efe3af2f TT |
11133 | value * |
11134 | ada_funcall_operation::evaluate (struct type *expect_type, | |
11135 | struct expression *exp, | |
11136 | enum noside noside) | |
11137 | { | |
11138 | const std::vector<operation_up> &args_up = std::get<1> (m_storage); | |
11139 | int nargs = args_up.size (); | |
11140 | std::vector<value *> argvec (nargs); | |
11141 | operation_up &callee_op = std::get<0> (m_storage); | |
11142 | ||
11143 | ada_var_value_operation *avv | |
11144 | = dynamic_cast<ada_var_value_operation *> (callee_op.get ()); | |
11145 | if (avv != nullptr | |
6c9c307c | 11146 | && avv->get_symbol ()->domain () == UNDEF_DOMAIN) |
efe3af2f TT |
11147 | error (_("Unexpected unresolved symbol, %s, during evaluation"), |
11148 | avv->get_symbol ()->print_name ()); | |
11149 | ||
11150 | value *callee = callee_op->evaluate (nullptr, exp, noside); | |
11151 | for (int i = 0; i < args_up.size (); ++i) | |
11152 | argvec[i] = args_up[i]->evaluate (nullptr, exp, noside); | |
11153 | ||
11154 | if (ada_is_constrained_packed_array_type | |
d0c97917 | 11155 | (desc_base_type (callee->type ()))) |
efe3af2f | 11156 | callee = ada_coerce_to_simple_array (callee); |
d0c97917 TT |
11157 | else if (callee->type ()->code () == TYPE_CODE_ARRAY |
11158 | && TYPE_FIELD_BITSIZE (callee->type (), 0) != 0) | |
efe3af2f TT |
11159 | /* This is a packed array that has already been fixed, and |
11160 | therefore already coerced to a simple array. Nothing further | |
11161 | to do. */ | |
11162 | ; | |
d0c97917 | 11163 | else if (callee->type ()->code () == TYPE_CODE_REF) |
efe3af2f TT |
11164 | { |
11165 | /* Make sure we dereference references so that all the code below | |
11166 | feels like it's really handling the referenced value. Wrapping | |
11167 | types (for alignment) may be there, so make sure we strip them as | |
11168 | well. */ | |
11169 | callee = ada_to_fixed_value (coerce_ref (callee)); | |
11170 | } | |
d0c97917 | 11171 | else if (callee->type ()->code () == TYPE_CODE_ARRAY |
efe3af2f TT |
11172 | && VALUE_LVAL (callee) == lval_memory) |
11173 | callee = value_addr (callee); | |
11174 | ||
d0c97917 | 11175 | struct type *type = ada_check_typedef (callee->type ()); |
efe3af2f TT |
11176 | |
11177 | /* Ada allows us to implicitly dereference arrays when subscripting | |
11178 | them. So, if this is an array typedef (encoding use for array | |
11179 | access types encoded as fat pointers), strip it now. */ | |
11180 | if (type->code () == TYPE_CODE_TYPEDEF) | |
11181 | type = ada_typedef_target_type (type); | |
11182 | ||
11183 | if (type->code () == TYPE_CODE_PTR) | |
11184 | { | |
27710edb | 11185 | switch (ada_check_typedef (type->target_type ())->code ()) |
efe3af2f TT |
11186 | { |
11187 | case TYPE_CODE_FUNC: | |
27710edb | 11188 | type = ada_check_typedef (type->target_type ()); |
efe3af2f TT |
11189 | break; |
11190 | case TYPE_CODE_ARRAY: | |
11191 | break; | |
11192 | case TYPE_CODE_STRUCT: | |
11193 | if (noside != EVAL_AVOID_SIDE_EFFECTS) | |
11194 | callee = ada_value_ind (callee); | |
27710edb | 11195 | type = ada_check_typedef (type->target_type ()); |
efe3af2f TT |
11196 | break; |
11197 | default: | |
11198 | error (_("cannot subscript or call something of type `%s'"), | |
d0c97917 | 11199 | ada_type_name (callee->type ())); |
efe3af2f TT |
11200 | break; |
11201 | } | |
11202 | } | |
11203 | ||
11204 | switch (type->code ()) | |
11205 | { | |
11206 | case TYPE_CODE_FUNC: | |
11207 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
11208 | { | |
27710edb | 11209 | if (type->target_type () == NULL) |
efe3af2f | 11210 | error_call_unknown_return_type (NULL); |
27710edb | 11211 | return allocate_value (type->target_type ()); |
efe3af2f TT |
11212 | } |
11213 | return call_function_by_hand (callee, NULL, argvec); | |
11214 | case TYPE_CODE_INTERNAL_FUNCTION: | |
11215 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
11216 | /* We don't know anything about what the internal | |
11217 | function might return, but we have to return | |
11218 | something. */ | |
11219 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
11220 | not_lval); | |
11221 | else | |
11222 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
11223 | callee, nargs, | |
11224 | argvec.data ()); | |
11225 | ||
d3c54a1c TT |
11226 | case TYPE_CODE_STRUCT: |
11227 | { | |
11228 | int arity; | |
4c4b4cd2 | 11229 | |
d3c54a1c TT |
11230 | arity = ada_array_arity (type); |
11231 | type = ada_array_element_type (type, nargs); | |
11232 | if (type == NULL) | |
11233 | error (_("cannot subscript or call a record")); | |
11234 | if (arity != nargs) | |
11235 | error (_("wrong number of subscripts; expecting %d"), arity); | |
11236 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
11237 | return value_zero (ada_aligned_type (type), lval_memory); | |
11238 | return | |
11239 | unwrap_value (ada_value_subscript | |
11240 | (callee, nargs, argvec.data ())); | |
11241 | } | |
11242 | case TYPE_CODE_ARRAY: | |
14f9c5c9 | 11243 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 11244 | { |
d3c54a1c TT |
11245 | type = ada_array_element_type (type, nargs); |
11246 | if (type == NULL) | |
11247 | error (_("element type of array unknown")); | |
dda83cd7 | 11248 | else |
d3c54a1c | 11249 | return value_zero (ada_aligned_type (type), lval_memory); |
dda83cd7 | 11250 | } |
d3c54a1c TT |
11251 | return |
11252 | unwrap_value (ada_value_subscript | |
11253 | (ada_coerce_to_simple_array (callee), | |
11254 | nargs, argvec.data ())); | |
11255 | case TYPE_CODE_PTR: /* Pointer to array */ | |
11256 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
dda83cd7 | 11257 | { |
27710edb | 11258 | type = to_fixed_array_type (type->target_type (), NULL, 1); |
d3c54a1c TT |
11259 | type = ada_array_element_type (type, nargs); |
11260 | if (type == NULL) | |
11261 | error (_("element type of array unknown")); | |
96967637 | 11262 | else |
d3c54a1c | 11263 | return value_zero (ada_aligned_type (type), lval_memory); |
dda83cd7 | 11264 | } |
d3c54a1c TT |
11265 | return |
11266 | unwrap_value (ada_value_ptr_subscript (callee, nargs, | |
11267 | argvec.data ())); | |
6b0d7253 | 11268 | |
d3c54a1c TT |
11269 | default: |
11270 | error (_("Attempt to index or call something other than an " | |
11271 | "array or function")); | |
11272 | } | |
11273 | } | |
5b4ee69b | 11274 | |
d3c54a1c TT |
11275 | bool |
11276 | ada_funcall_operation::resolve (struct expression *exp, | |
11277 | bool deprocedure_p, | |
11278 | bool parse_completion, | |
11279 | innermost_block_tracker *tracker, | |
11280 | struct type *context_type) | |
11281 | { | |
11282 | operation_up &callee_op = std::get<0> (m_storage); | |
5ec18f2b | 11283 | |
d3c54a1c TT |
11284 | ada_var_value_operation *avv |
11285 | = dynamic_cast<ada_var_value_operation *> (callee_op.get ()); | |
11286 | if (avv == nullptr) | |
11287 | return false; | |
5ec18f2b | 11288 | |
d3c54a1c | 11289 | symbol *sym = avv->get_symbol (); |
6c9c307c | 11290 | if (sym->domain () != UNDEF_DOMAIN) |
d3c54a1c | 11291 | return false; |
dda83cd7 | 11292 | |
d3c54a1c TT |
11293 | const std::vector<operation_up> &args_up = std::get<1> (m_storage); |
11294 | int nargs = args_up.size (); | |
11295 | std::vector<value *> argvec (nargs); | |
284614f0 | 11296 | |
d3c54a1c TT |
11297 | for (int i = 0; i < args_up.size (); ++i) |
11298 | argvec[i] = args_up[i]->evaluate (nullptr, exp, EVAL_AVOID_SIDE_EFFECTS); | |
52ce6436 | 11299 | |
d3c54a1c TT |
11300 | const block *block = avv->get_block (); |
11301 | block_symbol resolved | |
11302 | = ada_resolve_funcall (sym, block, | |
11303 | context_type, parse_completion, | |
11304 | nargs, argvec.data (), | |
11305 | tracker); | |
11306 | ||
11307 | std::get<0> (m_storage) | |
9e5e03df | 11308 | = make_operation<ada_var_value_operation> (resolved); |
d3c54a1c TT |
11309 | return false; |
11310 | } | |
11311 | ||
11312 | bool | |
11313 | ada_ternop_slice_operation::resolve (struct expression *exp, | |
11314 | bool deprocedure_p, | |
11315 | bool parse_completion, | |
11316 | innermost_block_tracker *tracker, | |
11317 | struct type *context_type) | |
11318 | { | |
11319 | /* Historically this check was done during resolution, so we | |
11320 | continue that here. */ | |
11321 | value *v = std::get<0> (m_storage)->evaluate (context_type, exp, | |
11322 | EVAL_AVOID_SIDE_EFFECTS); | |
d0c97917 | 11323 | if (ada_is_any_packed_array_type (v->type ())) |
d3c54a1c TT |
11324 | error (_("cannot slice a packed array")); |
11325 | return false; | |
11326 | } | |
14f9c5c9 | 11327 | |
14f9c5c9 | 11328 | } |
d3c54a1c | 11329 | |
14f9c5c9 | 11330 | \f |
d2e4a39e | 11331 | |
4c4b4cd2 PH |
11332 | /* Return non-zero iff TYPE represents a System.Address type. */ |
11333 | ||
11334 | int | |
11335 | ada_is_system_address_type (struct type *type) | |
11336 | { | |
7d93a1e0 | 11337 | return (type->name () && strcmp (type->name (), "system__address") == 0); |
4c4b4cd2 PH |
11338 | } |
11339 | ||
14f9c5c9 | 11340 | \f |
d2e4a39e | 11341 | |
dda83cd7 | 11342 | /* Range types */ |
14f9c5c9 AS |
11343 | |
11344 | /* Scan STR beginning at position K for a discriminant name, and | |
11345 | return the value of that discriminant field of DVAL in *PX. If | |
11346 | PNEW_K is not null, put the position of the character beyond the | |
11347 | name scanned in *PNEW_K. Return 1 if successful; return 0 and do | |
4c4b4cd2 | 11348 | not alter *PX and *PNEW_K if unsuccessful. */ |
14f9c5c9 AS |
11349 | |
11350 | static int | |
108d56a4 | 11351 | scan_discrim_bound (const char *str, int k, struct value *dval, LONGEST * px, |
dda83cd7 | 11352 | int *pnew_k) |
14f9c5c9 | 11353 | { |
5f9febe0 | 11354 | static std::string storage; |
5da1a4d3 | 11355 | const char *pstart, *pend, *bound; |
d2e4a39e | 11356 | struct value *bound_val; |
14f9c5c9 AS |
11357 | |
11358 | if (dval == NULL || str == NULL || str[k] == '\0') | |
11359 | return 0; | |
11360 | ||
5da1a4d3 SM |
11361 | pstart = str + k; |
11362 | pend = strstr (pstart, "__"); | |
14f9c5c9 AS |
11363 | if (pend == NULL) |
11364 | { | |
5da1a4d3 | 11365 | bound = pstart; |
14f9c5c9 AS |
11366 | k += strlen (bound); |
11367 | } | |
d2e4a39e | 11368 | else |
14f9c5c9 | 11369 | { |
5da1a4d3 SM |
11370 | int len = pend - pstart; |
11371 | ||
11372 | /* Strip __ and beyond. */ | |
5f9febe0 TT |
11373 | storage = std::string (pstart, len); |
11374 | bound = storage.c_str (); | |
d2e4a39e | 11375 | k = pend - str; |
14f9c5c9 | 11376 | } |
d2e4a39e | 11377 | |
d0c97917 | 11378 | bound_val = ada_search_struct_field (bound, dval, 0, dval->type ()); |
14f9c5c9 AS |
11379 | if (bound_val == NULL) |
11380 | return 0; | |
11381 | ||
11382 | *px = value_as_long (bound_val); | |
11383 | if (pnew_k != NULL) | |
11384 | *pnew_k = k; | |
11385 | return 1; | |
11386 | } | |
11387 | ||
25a1127b TT |
11388 | /* Value of variable named NAME. Only exact matches are considered. |
11389 | If no such variable found, then if ERR_MSG is null, returns 0, and | |
4c4b4cd2 PH |
11390 | otherwise causes an error with message ERR_MSG. */ |
11391 | ||
d2e4a39e | 11392 | static struct value * |
edb0c9cb | 11393 | get_var_value (const char *name, const char *err_msg) |
14f9c5c9 | 11394 | { |
25a1127b TT |
11395 | std::string quoted_name = add_angle_brackets (name); |
11396 | ||
11397 | lookup_name_info lookup_name (quoted_name, symbol_name_match_type::FULL); | |
14f9c5c9 | 11398 | |
d1183b06 TT |
11399 | std::vector<struct block_symbol> syms |
11400 | = ada_lookup_symbol_list_worker (lookup_name, | |
11401 | get_selected_block (0), | |
11402 | VAR_DOMAIN, 1); | |
14f9c5c9 | 11403 | |
d1183b06 | 11404 | if (syms.size () != 1) |
14f9c5c9 AS |
11405 | { |
11406 | if (err_msg == NULL) | |
dda83cd7 | 11407 | return 0; |
14f9c5c9 | 11408 | else |
dda83cd7 | 11409 | error (("%s"), err_msg); |
14f9c5c9 AS |
11410 | } |
11411 | ||
54d343a2 | 11412 | return value_of_variable (syms[0].symbol, syms[0].block); |
14f9c5c9 | 11413 | } |
d2e4a39e | 11414 | |
edb0c9cb PA |
11415 | /* Value of integer variable named NAME in the current environment. |
11416 | If no such variable is found, returns false. Otherwise, sets VALUE | |
11417 | to the variable's value and returns true. */ | |
4c4b4cd2 | 11418 | |
edb0c9cb PA |
11419 | bool |
11420 | get_int_var_value (const char *name, LONGEST &value) | |
14f9c5c9 | 11421 | { |
4c4b4cd2 | 11422 | struct value *var_val = get_var_value (name, 0); |
d2e4a39e | 11423 | |
14f9c5c9 | 11424 | if (var_val == 0) |
edb0c9cb PA |
11425 | return false; |
11426 | ||
11427 | value = value_as_long (var_val); | |
11428 | return true; | |
14f9c5c9 | 11429 | } |
d2e4a39e | 11430 | |
14f9c5c9 AS |
11431 | |
11432 | /* Return a range type whose base type is that of the range type named | |
11433 | NAME in the current environment, and whose bounds are calculated | |
4c4b4cd2 | 11434 | from NAME according to the GNAT range encoding conventions. |
1ce677a4 UW |
11435 | Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the |
11436 | corresponding range type from debug information; fall back to using it | |
11437 | if symbol lookup fails. If a new type must be created, allocate it | |
11438 | like ORIG_TYPE was. The bounds information, in general, is encoded | |
11439 | in NAME, the base type given in the named range type. */ | |
14f9c5c9 | 11440 | |
d2e4a39e | 11441 | static struct type * |
28c85d6c | 11442 | to_fixed_range_type (struct type *raw_type, struct value *dval) |
14f9c5c9 | 11443 | { |
0d5cff50 | 11444 | const char *name; |
14f9c5c9 | 11445 | struct type *base_type; |
108d56a4 | 11446 | const char *subtype_info; |
14f9c5c9 | 11447 | |
28c85d6c | 11448 | gdb_assert (raw_type != NULL); |
7d93a1e0 | 11449 | gdb_assert (raw_type->name () != NULL); |
dddfab26 | 11450 | |
78134374 | 11451 | if (raw_type->code () == TYPE_CODE_RANGE) |
27710edb | 11452 | base_type = raw_type->target_type (); |
14f9c5c9 AS |
11453 | else |
11454 | base_type = raw_type; | |
11455 | ||
7d93a1e0 | 11456 | name = raw_type->name (); |
14f9c5c9 AS |
11457 | subtype_info = strstr (name, "___XD"); |
11458 | if (subtype_info == NULL) | |
690cc4eb | 11459 | { |
43bbcdc2 PH |
11460 | LONGEST L = ada_discrete_type_low_bound (raw_type); |
11461 | LONGEST U = ada_discrete_type_high_bound (raw_type); | |
5b4ee69b | 11462 | |
690cc4eb PH |
11463 | if (L < INT_MIN || U > INT_MAX) |
11464 | return raw_type; | |
11465 | else | |
0c9c3474 SA |
11466 | return create_static_range_type (alloc_type_copy (raw_type), raw_type, |
11467 | L, U); | |
690cc4eb | 11468 | } |
14f9c5c9 AS |
11469 | else |
11470 | { | |
14f9c5c9 AS |
11471 | int prefix_len = subtype_info - name; |
11472 | LONGEST L, U; | |
11473 | struct type *type; | |
108d56a4 | 11474 | const char *bounds_str; |
14f9c5c9 AS |
11475 | int n; |
11476 | ||
14f9c5c9 AS |
11477 | subtype_info += 5; |
11478 | bounds_str = strchr (subtype_info, '_'); | |
11479 | n = 1; | |
11480 | ||
d2e4a39e | 11481 | if (*subtype_info == 'L') |
dda83cd7 SM |
11482 | { |
11483 | if (!ada_scan_number (bounds_str, n, &L, &n) | |
11484 | && !scan_discrim_bound (bounds_str, n, dval, &L, &n)) | |
11485 | return raw_type; | |
11486 | if (bounds_str[n] == '_') | |
11487 | n += 2; | |
11488 | else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */ | |
11489 | n += 1; | |
11490 | subtype_info += 1; | |
11491 | } | |
d2e4a39e | 11492 | else |
dda83cd7 | 11493 | { |
5f9febe0 TT |
11494 | std::string name_buf = std::string (name, prefix_len) + "___L"; |
11495 | if (!get_int_var_value (name_buf.c_str (), L)) | |
dda83cd7 SM |
11496 | { |
11497 | lim_warning (_("Unknown lower bound, using 1.")); | |
11498 | L = 1; | |
11499 | } | |
11500 | } | |
14f9c5c9 | 11501 | |
d2e4a39e | 11502 | if (*subtype_info == 'U') |
dda83cd7 SM |
11503 | { |
11504 | if (!ada_scan_number (bounds_str, n, &U, &n) | |
11505 | && !scan_discrim_bound (bounds_str, n, dval, &U, &n)) | |
11506 | return raw_type; | |
11507 | } | |
d2e4a39e | 11508 | else |
dda83cd7 | 11509 | { |
5f9febe0 TT |
11510 | std::string name_buf = std::string (name, prefix_len) + "___U"; |
11511 | if (!get_int_var_value (name_buf.c_str (), U)) | |
dda83cd7 SM |
11512 | { |
11513 | lim_warning (_("Unknown upper bound, using %ld."), (long) L); | |
11514 | U = L; | |
11515 | } | |
11516 | } | |
14f9c5c9 | 11517 | |
0c9c3474 SA |
11518 | type = create_static_range_type (alloc_type_copy (raw_type), |
11519 | base_type, L, U); | |
f5a91472 | 11520 | /* create_static_range_type alters the resulting type's length |
dda83cd7 SM |
11521 | to match the size of the base_type, which is not what we want. |
11522 | Set it back to the original range type's length. */ | |
df86565b | 11523 | type->set_length (raw_type->length ()); |
d0e39ea2 | 11524 | type->set_name (name); |
14f9c5c9 AS |
11525 | return type; |
11526 | } | |
11527 | } | |
11528 | ||
4c4b4cd2 PH |
11529 | /* True iff NAME is the name of a range type. */ |
11530 | ||
14f9c5c9 | 11531 | int |
d2e4a39e | 11532 | ada_is_range_type_name (const char *name) |
14f9c5c9 AS |
11533 | { |
11534 | return (name != NULL && strstr (name, "___XD")); | |
d2e4a39e | 11535 | } |
14f9c5c9 | 11536 | \f |
d2e4a39e | 11537 | |
dda83cd7 | 11538 | /* Modular types */ |
4c4b4cd2 PH |
11539 | |
11540 | /* True iff TYPE is an Ada modular type. */ | |
14f9c5c9 | 11541 | |
14f9c5c9 | 11542 | int |
d2e4a39e | 11543 | ada_is_modular_type (struct type *type) |
14f9c5c9 | 11544 | { |
18af8284 | 11545 | struct type *subranged_type = get_base_type (type); |
14f9c5c9 | 11546 | |
78134374 | 11547 | return (subranged_type != NULL && type->code () == TYPE_CODE_RANGE |
dda83cd7 SM |
11548 | && subranged_type->code () == TYPE_CODE_INT |
11549 | && subranged_type->is_unsigned ()); | |
14f9c5c9 AS |
11550 | } |
11551 | ||
4c4b4cd2 PH |
11552 | /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */ |
11553 | ||
61ee279c | 11554 | ULONGEST |
0056e4d5 | 11555 | ada_modulus (struct type *type) |
14f9c5c9 | 11556 | { |
5e500d33 SM |
11557 | const dynamic_prop &high = type->bounds ()->high; |
11558 | ||
11559 | if (high.kind () == PROP_CONST) | |
11560 | return (ULONGEST) high.const_val () + 1; | |
11561 | ||
11562 | /* If TYPE is unresolved, the high bound might be a location list. Return | |
11563 | 0, for lack of a better value to return. */ | |
11564 | return 0; | |
14f9c5c9 | 11565 | } |
d2e4a39e | 11566 | \f |
f7f9143b JB |
11567 | |
11568 | /* Ada exception catchpoint support: | |
11569 | --------------------------------- | |
11570 | ||
11571 | We support 3 kinds of exception catchpoints: | |
11572 | . catchpoints on Ada exceptions | |
11573 | . catchpoints on unhandled Ada exceptions | |
11574 | . catchpoints on failed assertions | |
11575 | ||
11576 | Exceptions raised during failed assertions, or unhandled exceptions | |
11577 | could perfectly be caught with the general catchpoint on Ada exceptions. | |
11578 | However, we can easily differentiate these two special cases, and having | |
11579 | the option to distinguish these two cases from the rest can be useful | |
11580 | to zero-in on certain situations. | |
11581 | ||
11582 | Exception catchpoints are a specialized form of breakpoint, | |
11583 | since they rely on inserting breakpoints inside known routines | |
11584 | of the GNAT runtime. The implementation therefore uses a standard | |
11585 | breakpoint structure of the BP_BREAKPOINT type, but with its own set | |
11586 | of breakpoint_ops. | |
11587 | ||
0259addd JB |
11588 | Support in the runtime for exception catchpoints have been changed |
11589 | a few times already, and these changes affect the implementation | |
11590 | of these catchpoints. In order to be able to support several | |
11591 | variants of the runtime, we use a sniffer that will determine | |
28010a5d | 11592 | the runtime variant used by the program being debugged. */ |
f7f9143b | 11593 | |
82eacd52 JB |
11594 | /* Ada's standard exceptions. |
11595 | ||
11596 | The Ada 83 standard also defined Numeric_Error. But there so many | |
11597 | situations where it was unclear from the Ada 83 Reference Manual | |
11598 | (RM) whether Constraint_Error or Numeric_Error should be raised, | |
11599 | that the ARG (Ada Rapporteur Group) eventually issued a Binding | |
11600 | Interpretation saying that anytime the RM says that Numeric_Error | |
11601 | should be raised, the implementation may raise Constraint_Error. | |
11602 | Ada 95 went one step further and pretty much removed Numeric_Error | |
11603 | from the list of standard exceptions (it made it a renaming of | |
11604 | Constraint_Error, to help preserve compatibility when compiling | |
11605 | an Ada83 compiler). As such, we do not include Numeric_Error from | |
11606 | this list of standard exceptions. */ | |
3d0b0fa3 | 11607 | |
27087b7f | 11608 | static const char * const standard_exc[] = { |
3d0b0fa3 JB |
11609 | "constraint_error", |
11610 | "program_error", | |
11611 | "storage_error", | |
11612 | "tasking_error" | |
11613 | }; | |
11614 | ||
0259addd JB |
11615 | typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void); |
11616 | ||
11617 | /* A structure that describes how to support exception catchpoints | |
11618 | for a given executable. */ | |
11619 | ||
11620 | struct exception_support_info | |
11621 | { | |
11622 | /* The name of the symbol to break on in order to insert | |
11623 | a catchpoint on exceptions. */ | |
11624 | const char *catch_exception_sym; | |
11625 | ||
11626 | /* The name of the symbol to break on in order to insert | |
11627 | a catchpoint on unhandled exceptions. */ | |
11628 | const char *catch_exception_unhandled_sym; | |
11629 | ||
11630 | /* The name of the symbol to break on in order to insert | |
11631 | a catchpoint on failed assertions. */ | |
11632 | const char *catch_assert_sym; | |
11633 | ||
9f757bf7 XR |
11634 | /* The name of the symbol to break on in order to insert |
11635 | a catchpoint on exception handling. */ | |
11636 | const char *catch_handlers_sym; | |
11637 | ||
0259addd JB |
11638 | /* Assuming that the inferior just triggered an unhandled exception |
11639 | catchpoint, this function is responsible for returning the address | |
11640 | in inferior memory where the name of that exception is stored. | |
11641 | Return zero if the address could not be computed. */ | |
11642 | ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr; | |
11643 | }; | |
11644 | ||
11645 | static CORE_ADDR ada_unhandled_exception_name_addr (void); | |
11646 | static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void); | |
11647 | ||
11648 | /* The following exception support info structure describes how to | |
11649 | implement exception catchpoints with the latest version of the | |
ca683e3a | 11650 | Ada runtime (as of 2019-08-??). */ |
0259addd JB |
11651 | |
11652 | static const struct exception_support_info default_exception_support_info = | |
ca683e3a AO |
11653 | { |
11654 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11655 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11656 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
11657 | "__gnat_begin_handler_v1", /* catch_handlers_sym */ | |
11658 | ada_unhandled_exception_name_addr | |
11659 | }; | |
11660 | ||
11661 | /* The following exception support info structure describes how to | |
11662 | implement exception catchpoints with an earlier version of the | |
11663 | Ada runtime (as of 2007-03-06) using v0 of the EH ABI. */ | |
11664 | ||
11665 | static const struct exception_support_info exception_support_info_v0 = | |
0259addd JB |
11666 | { |
11667 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11668 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11669 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11670 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11671 | ada_unhandled_exception_name_addr |
11672 | }; | |
11673 | ||
11674 | /* The following exception support info structure describes how to | |
11675 | implement exception catchpoints with a slightly older version | |
11676 | of the Ada runtime. */ | |
11677 | ||
11678 | static const struct exception_support_info exception_support_info_fallback = | |
11679 | { | |
11680 | "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */ | |
11681 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11682 | "system__assertions__raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11683 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11684 | ada_unhandled_exception_name_addr_from_raise |
11685 | }; | |
11686 | ||
f17011e0 JB |
11687 | /* Return nonzero if we can detect the exception support routines |
11688 | described in EINFO. | |
11689 | ||
11690 | This function errors out if an abnormal situation is detected | |
11691 | (for instance, if we find the exception support routines, but | |
11692 | that support is found to be incomplete). */ | |
11693 | ||
11694 | static int | |
11695 | ada_has_this_exception_support (const struct exception_support_info *einfo) | |
11696 | { | |
11697 | struct symbol *sym; | |
11698 | ||
11699 | /* The symbol we're looking up is provided by a unit in the GNAT runtime | |
11700 | that should be compiled with debugging information. As a result, we | |
11701 | expect to find that symbol in the symtabs. */ | |
11702 | ||
11703 | sym = standard_lookup (einfo->catch_exception_sym, NULL, VAR_DOMAIN); | |
11704 | if (sym == NULL) | |
a6af7abe JB |
11705 | { |
11706 | /* Perhaps we did not find our symbol because the Ada runtime was | |
11707 | compiled without debugging info, or simply stripped of it. | |
11708 | It happens on some GNU/Linux distributions for instance, where | |
11709 | users have to install a separate debug package in order to get | |
11710 | the runtime's debugging info. In that situation, let the user | |
11711 | know why we cannot insert an Ada exception catchpoint. | |
11712 | ||
11713 | Note: Just for the purpose of inserting our Ada exception | |
11714 | catchpoint, we could rely purely on the associated minimal symbol. | |
11715 | But we would be operating in degraded mode anyway, since we are | |
11716 | still lacking the debugging info needed later on to extract | |
11717 | the name of the exception being raised (this name is printed in | |
11718 | the catchpoint message, and is also used when trying to catch | |
11719 | a specific exception). We do not handle this case for now. */ | |
3b7344d5 | 11720 | struct bound_minimal_symbol msym |
1c8e84b0 JB |
11721 | = lookup_minimal_symbol (einfo->catch_exception_sym, NULL, NULL); |
11722 | ||
60f62e2b | 11723 | if (msym.minsym && msym.minsym->type () != mst_solib_trampoline) |
a6af7abe JB |
11724 | error (_("Your Ada runtime appears to be missing some debugging " |
11725 | "information.\nCannot insert Ada exception catchpoint " | |
11726 | "in this configuration.")); | |
11727 | ||
11728 | return 0; | |
11729 | } | |
f17011e0 JB |
11730 | |
11731 | /* Make sure that the symbol we found corresponds to a function. */ | |
11732 | ||
66d7f48f | 11733 | if (sym->aclass () != LOC_BLOCK) |
ca683e3a AO |
11734 | { |
11735 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
66d7f48f | 11736 | sym->linkage_name (), sym->aclass ()); |
ca683e3a AO |
11737 | return 0; |
11738 | } | |
11739 | ||
11740 | sym = standard_lookup (einfo->catch_handlers_sym, NULL, VAR_DOMAIN); | |
11741 | if (sym == NULL) | |
11742 | { | |
11743 | struct bound_minimal_symbol msym | |
11744 | = lookup_minimal_symbol (einfo->catch_handlers_sym, NULL, NULL); | |
11745 | ||
60f62e2b | 11746 | if (msym.minsym && msym.minsym->type () != mst_solib_trampoline) |
ca683e3a AO |
11747 | error (_("Your Ada runtime appears to be missing some debugging " |
11748 | "information.\nCannot insert Ada exception catchpoint " | |
11749 | "in this configuration.")); | |
11750 | ||
11751 | return 0; | |
11752 | } | |
11753 | ||
11754 | /* Make sure that the symbol we found corresponds to a function. */ | |
11755 | ||
66d7f48f | 11756 | if (sym->aclass () != LOC_BLOCK) |
ca683e3a AO |
11757 | { |
11758 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
66d7f48f | 11759 | sym->linkage_name (), sym->aclass ()); |
ca683e3a AO |
11760 | return 0; |
11761 | } | |
f17011e0 JB |
11762 | |
11763 | return 1; | |
11764 | } | |
11765 | ||
0259addd JB |
11766 | /* Inspect the Ada runtime and determine which exception info structure |
11767 | should be used to provide support for exception catchpoints. | |
11768 | ||
3eecfa55 JB |
11769 | This function will always set the per-inferior exception_info, |
11770 | or raise an error. */ | |
0259addd JB |
11771 | |
11772 | static void | |
11773 | ada_exception_support_info_sniffer (void) | |
11774 | { | |
3eecfa55 | 11775 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
0259addd JB |
11776 | |
11777 | /* If the exception info is already known, then no need to recompute it. */ | |
3eecfa55 | 11778 | if (data->exception_info != NULL) |
0259addd JB |
11779 | return; |
11780 | ||
11781 | /* Check the latest (default) exception support info. */ | |
f17011e0 | 11782 | if (ada_has_this_exception_support (&default_exception_support_info)) |
0259addd | 11783 | { |
3eecfa55 | 11784 | data->exception_info = &default_exception_support_info; |
0259addd JB |
11785 | return; |
11786 | } | |
11787 | ||
ca683e3a AO |
11788 | /* Try the v0 exception suport info. */ |
11789 | if (ada_has_this_exception_support (&exception_support_info_v0)) | |
11790 | { | |
11791 | data->exception_info = &exception_support_info_v0; | |
11792 | return; | |
11793 | } | |
11794 | ||
0259addd | 11795 | /* Try our fallback exception suport info. */ |
f17011e0 | 11796 | if (ada_has_this_exception_support (&exception_support_info_fallback)) |
0259addd | 11797 | { |
3eecfa55 | 11798 | data->exception_info = &exception_support_info_fallback; |
0259addd JB |
11799 | return; |
11800 | } | |
11801 | ||
11802 | /* Sometimes, it is normal for us to not be able to find the routine | |
11803 | we are looking for. This happens when the program is linked with | |
11804 | the shared version of the GNAT runtime, and the program has not been | |
11805 | started yet. Inform the user of these two possible causes if | |
11806 | applicable. */ | |
11807 | ||
ccefe4c4 | 11808 | if (ada_update_initial_language (language_unknown) != language_ada) |
0259addd JB |
11809 | error (_("Unable to insert catchpoint. Is this an Ada main program?")); |
11810 | ||
11811 | /* If the symbol does not exist, then check that the program is | |
11812 | already started, to make sure that shared libraries have been | |
11813 | loaded. If it is not started, this may mean that the symbol is | |
11814 | in a shared library. */ | |
11815 | ||
e99b03dc | 11816 | if (inferior_ptid.pid () == 0) |
0259addd JB |
11817 | error (_("Unable to insert catchpoint. Try to start the program first.")); |
11818 | ||
11819 | /* At this point, we know that we are debugging an Ada program and | |
11820 | that the inferior has been started, but we still are not able to | |
0963b4bd | 11821 | find the run-time symbols. That can mean that we are in |
0259addd JB |
11822 | configurable run time mode, or that a-except as been optimized |
11823 | out by the linker... In any case, at this point it is not worth | |
11824 | supporting this feature. */ | |
11825 | ||
7dda8cff | 11826 | error (_("Cannot insert Ada exception catchpoints in this configuration.")); |
0259addd JB |
11827 | } |
11828 | ||
f7f9143b JB |
11829 | /* True iff FRAME is very likely to be that of a function that is |
11830 | part of the runtime system. This is all very heuristic, but is | |
11831 | intended to be used as advice as to what frames are uninteresting | |
11832 | to most users. */ | |
11833 | ||
11834 | static int | |
bd2b40ac | 11835 | is_known_support_routine (frame_info_ptr frame) |
f7f9143b | 11836 | { |
692465f1 | 11837 | enum language func_lang; |
f7f9143b | 11838 | int i; |
f35a17b5 | 11839 | const char *fullname; |
f7f9143b | 11840 | |
4ed6b5be JB |
11841 | /* If this code does not have any debugging information (no symtab), |
11842 | This cannot be any user code. */ | |
f7f9143b | 11843 | |
51abb421 | 11844 | symtab_and_line sal = find_frame_sal (frame); |
f7f9143b JB |
11845 | if (sal.symtab == NULL) |
11846 | return 1; | |
11847 | ||
4ed6b5be JB |
11848 | /* If there is a symtab, but the associated source file cannot be |
11849 | located, then assume this is not user code: Selecting a frame | |
11850 | for which we cannot display the code would not be very helpful | |
11851 | for the user. This should also take care of case such as VxWorks | |
11852 | where the kernel has some debugging info provided for a few units. */ | |
f7f9143b | 11853 | |
f35a17b5 JK |
11854 | fullname = symtab_to_fullname (sal.symtab); |
11855 | if (access (fullname, R_OK) != 0) | |
f7f9143b JB |
11856 | return 1; |
11857 | ||
85102364 | 11858 | /* Check the unit filename against the Ada runtime file naming. |
4ed6b5be JB |
11859 | We also check the name of the objfile against the name of some |
11860 | known system libraries that sometimes come with debugging info | |
11861 | too. */ | |
11862 | ||
f7f9143b JB |
11863 | for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1) |
11864 | { | |
11865 | re_comp (known_runtime_file_name_patterns[i]); | |
f69c91ad | 11866 | if (re_exec (lbasename (sal.symtab->filename))) |
dda83cd7 | 11867 | return 1; |
3c86fae3 SM |
11868 | if (sal.symtab->compunit ()->objfile () != NULL |
11869 | && re_exec (objfile_name (sal.symtab->compunit ()->objfile ()))) | |
dda83cd7 | 11870 | return 1; |
f7f9143b JB |
11871 | } |
11872 | ||
4ed6b5be | 11873 | /* Check whether the function is a GNAT-generated entity. */ |
f7f9143b | 11874 | |
c6dc63a1 TT |
11875 | gdb::unique_xmalloc_ptr<char> func_name |
11876 | = find_frame_funname (frame, &func_lang, NULL); | |
f7f9143b JB |
11877 | if (func_name == NULL) |
11878 | return 1; | |
11879 | ||
11880 | for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1) | |
11881 | { | |
11882 | re_comp (known_auxiliary_function_name_patterns[i]); | |
c6dc63a1 TT |
11883 | if (re_exec (func_name.get ())) |
11884 | return 1; | |
f7f9143b JB |
11885 | } |
11886 | ||
11887 | return 0; | |
11888 | } | |
11889 | ||
11890 | /* Find the first frame that contains debugging information and that is not | |
11891 | part of the Ada run-time, starting from FI and moving upward. */ | |
11892 | ||
0ef643c8 | 11893 | void |
bd2b40ac | 11894 | ada_find_printable_frame (frame_info_ptr fi) |
f7f9143b JB |
11895 | { |
11896 | for (; fi != NULL; fi = get_prev_frame (fi)) | |
11897 | { | |
11898 | if (!is_known_support_routine (fi)) | |
dda83cd7 SM |
11899 | { |
11900 | select_frame (fi); | |
11901 | break; | |
11902 | } | |
f7f9143b JB |
11903 | } |
11904 | ||
11905 | } | |
11906 | ||
11907 | /* Assuming that the inferior just triggered an unhandled exception | |
11908 | catchpoint, return the address in inferior memory where the name | |
11909 | of the exception is stored. | |
11910 | ||
11911 | Return zero if the address could not be computed. */ | |
11912 | ||
11913 | static CORE_ADDR | |
11914 | ada_unhandled_exception_name_addr (void) | |
0259addd JB |
11915 | { |
11916 | return parse_and_eval_address ("e.full_name"); | |
11917 | } | |
11918 | ||
11919 | /* Same as ada_unhandled_exception_name_addr, except that this function | |
11920 | should be used when the inferior uses an older version of the runtime, | |
11921 | where the exception name needs to be extracted from a specific frame | |
11922 | several frames up in the callstack. */ | |
11923 | ||
11924 | static CORE_ADDR | |
11925 | ada_unhandled_exception_name_addr_from_raise (void) | |
f7f9143b JB |
11926 | { |
11927 | int frame_level; | |
bd2b40ac | 11928 | frame_info_ptr fi; |
3eecfa55 | 11929 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
f7f9143b JB |
11930 | |
11931 | /* To determine the name of this exception, we need to select | |
11932 | the frame corresponding to RAISE_SYM_NAME. This frame is | |
11933 | at least 3 levels up, so we simply skip the first 3 frames | |
11934 | without checking the name of their associated function. */ | |
11935 | fi = get_current_frame (); | |
11936 | for (frame_level = 0; frame_level < 3; frame_level += 1) | |
11937 | if (fi != NULL) | |
11938 | fi = get_prev_frame (fi); | |
11939 | ||
11940 | while (fi != NULL) | |
11941 | { | |
692465f1 JB |
11942 | enum language func_lang; |
11943 | ||
c6dc63a1 TT |
11944 | gdb::unique_xmalloc_ptr<char> func_name |
11945 | = find_frame_funname (fi, &func_lang, NULL); | |
55b87a52 KS |
11946 | if (func_name != NULL) |
11947 | { | |
dda83cd7 | 11948 | if (strcmp (func_name.get (), |
55b87a52 KS |
11949 | data->exception_info->catch_exception_sym) == 0) |
11950 | break; /* We found the frame we were looking for... */ | |
55b87a52 | 11951 | } |
fb44b1a7 | 11952 | fi = get_prev_frame (fi); |
f7f9143b JB |
11953 | } |
11954 | ||
11955 | if (fi == NULL) | |
11956 | return 0; | |
11957 | ||
11958 | select_frame (fi); | |
11959 | return parse_and_eval_address ("id.full_name"); | |
11960 | } | |
11961 | ||
11962 | /* Assuming the inferior just triggered an Ada exception catchpoint | |
11963 | (of any type), return the address in inferior memory where the name | |
11964 | of the exception is stored, if applicable. | |
11965 | ||
45db7c09 PA |
11966 | Assumes the selected frame is the current frame. |
11967 | ||
f7f9143b JB |
11968 | Return zero if the address could not be computed, or if not relevant. */ |
11969 | ||
11970 | static CORE_ADDR | |
7bd86313 | 11971 | ada_exception_name_addr_1 (enum ada_exception_catchpoint_kind ex) |
f7f9143b | 11972 | { |
3eecfa55 JB |
11973 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
11974 | ||
f7f9143b JB |
11975 | switch (ex) |
11976 | { | |
761269c8 | 11977 | case ada_catch_exception: |
dda83cd7 SM |
11978 | return (parse_and_eval_address ("e.full_name")); |
11979 | break; | |
f7f9143b | 11980 | |
761269c8 | 11981 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
11982 | return data->exception_info->unhandled_exception_name_addr (); |
11983 | break; | |
9f757bf7 XR |
11984 | |
11985 | case ada_catch_handlers: | |
dda83cd7 | 11986 | return 0; /* The runtimes does not provide access to the exception |
9f757bf7 | 11987 | name. */ |
dda83cd7 | 11988 | break; |
9f757bf7 | 11989 | |
761269c8 | 11990 | case ada_catch_assert: |
dda83cd7 SM |
11991 | return 0; /* Exception name is not relevant in this case. */ |
11992 | break; | |
f7f9143b JB |
11993 | |
11994 | default: | |
f34652de | 11995 | internal_error (_("unexpected catchpoint type")); |
dda83cd7 | 11996 | break; |
f7f9143b JB |
11997 | } |
11998 | ||
11999 | return 0; /* Should never be reached. */ | |
12000 | } | |
12001 | ||
e547c119 JB |
12002 | /* Assuming the inferior is stopped at an exception catchpoint, |
12003 | return the message which was associated to the exception, if | |
12004 | available. Return NULL if the message could not be retrieved. | |
12005 | ||
e547c119 JB |
12006 | Note: The exception message can be associated to an exception |
12007 | either through the use of the Raise_Exception function, or | |
12008 | more simply (Ada 2005 and later), via: | |
12009 | ||
12010 | raise Exception_Name with "exception message"; | |
12011 | ||
12012 | */ | |
12013 | ||
6f46ac85 | 12014 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
12015 | ada_exception_message_1 (void) |
12016 | { | |
12017 | struct value *e_msg_val; | |
e547c119 | 12018 | int e_msg_len; |
e547c119 JB |
12019 | |
12020 | /* For runtimes that support this feature, the exception message | |
12021 | is passed as an unbounded string argument called "message". */ | |
12022 | e_msg_val = parse_and_eval ("message"); | |
12023 | if (e_msg_val == NULL) | |
12024 | return NULL; /* Exception message not supported. */ | |
12025 | ||
12026 | e_msg_val = ada_coerce_to_simple_array (e_msg_val); | |
12027 | gdb_assert (e_msg_val != NULL); | |
d0c97917 | 12028 | e_msg_len = e_msg_val->type ()->length (); |
e547c119 JB |
12029 | |
12030 | /* If the message string is empty, then treat it as if there was | |
12031 | no exception message. */ | |
12032 | if (e_msg_len <= 0) | |
12033 | return NULL; | |
12034 | ||
15f3b077 | 12035 | gdb::unique_xmalloc_ptr<char> e_msg ((char *) xmalloc (e_msg_len + 1)); |
9feb2d07 | 12036 | read_memory (e_msg_val->address (), (gdb_byte *) e_msg.get (), |
15f3b077 TT |
12037 | e_msg_len); |
12038 | e_msg.get ()[e_msg_len] = '\0'; | |
12039 | ||
12040 | return e_msg; | |
e547c119 JB |
12041 | } |
12042 | ||
12043 | /* Same as ada_exception_message_1, except that all exceptions are | |
12044 | contained here (returning NULL instead). */ | |
12045 | ||
6f46ac85 | 12046 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
12047 | ada_exception_message (void) |
12048 | { | |
6f46ac85 | 12049 | gdb::unique_xmalloc_ptr<char> e_msg; |
e547c119 | 12050 | |
a70b8144 | 12051 | try |
e547c119 JB |
12052 | { |
12053 | e_msg = ada_exception_message_1 (); | |
12054 | } | |
230d2906 | 12055 | catch (const gdb_exception_error &e) |
e547c119 | 12056 | { |
6f46ac85 | 12057 | e_msg.reset (nullptr); |
e547c119 | 12058 | } |
e547c119 JB |
12059 | |
12060 | return e_msg; | |
12061 | } | |
12062 | ||
f7f9143b JB |
12063 | /* Same as ada_exception_name_addr_1, except that it intercepts and contains |
12064 | any error that ada_exception_name_addr_1 might cause to be thrown. | |
12065 | When an error is intercepted, a warning with the error message is printed, | |
12066 | and zero is returned. */ | |
12067 | ||
12068 | static CORE_ADDR | |
7bd86313 | 12069 | ada_exception_name_addr (enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12070 | { |
f7f9143b JB |
12071 | CORE_ADDR result = 0; |
12072 | ||
a70b8144 | 12073 | try |
f7f9143b | 12074 | { |
7bd86313 | 12075 | result = ada_exception_name_addr_1 (ex); |
f7f9143b JB |
12076 | } |
12077 | ||
230d2906 | 12078 | catch (const gdb_exception_error &e) |
f7f9143b | 12079 | { |
3d6e9d23 | 12080 | warning (_("failed to get exception name: %s"), e.what ()); |
f7f9143b JB |
12081 | return 0; |
12082 | } | |
12083 | ||
12084 | return result; | |
12085 | } | |
12086 | ||
cb7de75e | 12087 | static std::string ada_exception_catchpoint_cond_string |
9f757bf7 XR |
12088 | (const char *excep_string, |
12089 | enum ada_exception_catchpoint_kind ex); | |
28010a5d PA |
12090 | |
12091 | /* Ada catchpoints. | |
12092 | ||
12093 | In the case of catchpoints on Ada exceptions, the catchpoint will | |
12094 | stop the target on every exception the program throws. When a user | |
12095 | specifies the name of a specific exception, we translate this | |
12096 | request into a condition expression (in text form), and then parse | |
12097 | it into an expression stored in each of the catchpoint's locations. | |
12098 | We then use this condition to check whether the exception that was | |
12099 | raised is the one the user is interested in. If not, then the | |
12100 | target is resumed again. We store the name of the requested | |
12101 | exception, in order to be able to re-set the condition expression | |
12102 | when symbols change. */ | |
12103 | ||
c1fc2657 | 12104 | /* An instance of this type is used to represent an Ada catchpoint. */ |
28010a5d | 12105 | |
74421c0b | 12106 | struct ada_catchpoint : public code_breakpoint |
28010a5d | 12107 | { |
73063f51 | 12108 | ada_catchpoint (struct gdbarch *gdbarch_, |
bd21b6c9 PA |
12109 | enum ada_exception_catchpoint_kind kind, |
12110 | struct symtab_and_line sal, | |
12111 | const char *addr_string_, | |
12112 | bool tempflag, | |
12113 | bool enabled, | |
12114 | bool from_tty) | |
74421c0b | 12115 | : code_breakpoint (gdbarch_, bp_catchpoint), |
73063f51 | 12116 | m_kind (kind) |
37f6a7f4 | 12117 | { |
bd21b6c9 PA |
12118 | add_location (sal); |
12119 | ||
74421c0b | 12120 | /* Unlike most code_breakpoint types, Ada catchpoints are |
bd21b6c9 PA |
12121 | pspace-specific. */ |
12122 | gdb_assert (sal.pspace != nullptr); | |
12123 | this->pspace = sal.pspace; | |
12124 | ||
12125 | if (from_tty) | |
12126 | { | |
12127 | struct gdbarch *loc_gdbarch = get_sal_arch (sal); | |
12128 | if (!loc_gdbarch) | |
12129 | loc_gdbarch = gdbarch; | |
12130 | ||
12131 | describe_other_breakpoints (loc_gdbarch, | |
12132 | sal.pspace, sal.pc, sal.section, -1); | |
12133 | /* FIXME: brobecker/2006-12-28: Actually, re-implement a special | |
12134 | version for exception catchpoints, because two catchpoints | |
12135 | used for different exception names will use the same address. | |
12136 | In this case, a "breakpoint ... also set at..." warning is | |
12137 | unproductive. Besides, the warning phrasing is also a bit | |
12138 | inappropriate, we should use the word catchpoint, and tell | |
12139 | the user what type of catchpoint it is. The above is good | |
12140 | enough for now, though. */ | |
12141 | } | |
12142 | ||
12143 | enable_state = enabled ? bp_enabled : bp_disabled; | |
12144 | disposition = tempflag ? disp_del : disp_donttouch; | |
264f9890 PA |
12145 | locspec = string_to_location_spec (&addr_string_, |
12146 | language_def (language_ada)); | |
bd21b6c9 | 12147 | language = language_ada; |
37f6a7f4 TT |
12148 | } |
12149 | ||
ae72050b TT |
12150 | struct bp_location *allocate_location () override; |
12151 | void re_set () override; | |
12152 | void check_status (struct bpstat *bs) override; | |
7bd86313 | 12153 | enum print_stop_action print_it (const bpstat *bs) const override; |
a67bcaba | 12154 | bool print_one (bp_location **) const override; |
b713485d | 12155 | void print_mention () const override; |
4d1ae558 | 12156 | void print_recreate (struct ui_file *fp) const override; |
ae72050b | 12157 | |
28010a5d | 12158 | /* The name of the specific exception the user specified. */ |
bc18fbb5 | 12159 | std::string excep_string; |
37f6a7f4 TT |
12160 | |
12161 | /* What kind of catchpoint this is. */ | |
12162 | enum ada_exception_catchpoint_kind m_kind; | |
28010a5d PA |
12163 | }; |
12164 | ||
8cd0bf5e PA |
12165 | /* An instance of this type is used to represent an Ada catchpoint |
12166 | breakpoint location. */ | |
12167 | ||
12168 | class ada_catchpoint_location : public bp_location | |
12169 | { | |
12170 | public: | |
12171 | explicit ada_catchpoint_location (ada_catchpoint *owner) | |
12172 | : bp_location (owner, bp_loc_software_breakpoint) | |
12173 | {} | |
12174 | ||
12175 | /* The condition that checks whether the exception that was raised | |
12176 | is the specific exception the user specified on catchpoint | |
12177 | creation. */ | |
12178 | expression_up excep_cond_expr; | |
12179 | }; | |
12180 | ||
28010a5d PA |
12181 | /* Parse the exception condition string in the context of each of the |
12182 | catchpoint's locations, and store them for later evaluation. */ | |
12183 | ||
12184 | static void | |
9f757bf7 | 12185 | create_excep_cond_exprs (struct ada_catchpoint *c, |
dda83cd7 | 12186 | enum ada_exception_catchpoint_kind ex) |
28010a5d | 12187 | { |
28010a5d | 12188 | /* Nothing to do if there's no specific exception to catch. */ |
bc18fbb5 | 12189 | if (c->excep_string.empty ()) |
28010a5d PA |
12190 | return; |
12191 | ||
12192 | /* Same if there are no locations... */ | |
c1fc2657 | 12193 | if (c->loc == NULL) |
28010a5d PA |
12194 | return; |
12195 | ||
fccf9de1 TT |
12196 | /* Compute the condition expression in text form, from the specific |
12197 | expection we want to catch. */ | |
12198 | std::string cond_string | |
12199 | = ada_exception_catchpoint_cond_string (c->excep_string.c_str (), ex); | |
28010a5d | 12200 | |
fccf9de1 TT |
12201 | /* Iterate over all the catchpoint's locations, and parse an |
12202 | expression for each. */ | |
40cb8ca5 | 12203 | for (bp_location *bl : c->locations ()) |
28010a5d PA |
12204 | { |
12205 | struct ada_catchpoint_location *ada_loc | |
fccf9de1 | 12206 | = (struct ada_catchpoint_location *) bl; |
4d01a485 | 12207 | expression_up exp; |
28010a5d | 12208 | |
fccf9de1 | 12209 | if (!bl->shlib_disabled) |
28010a5d | 12210 | { |
bbc13ae3 | 12211 | const char *s; |
28010a5d | 12212 | |
cb7de75e | 12213 | s = cond_string.c_str (); |
a70b8144 | 12214 | try |
28010a5d | 12215 | { |
fccf9de1 TT |
12216 | exp = parse_exp_1 (&s, bl->address, |
12217 | block_for_pc (bl->address), | |
036e657b | 12218 | 0); |
28010a5d | 12219 | } |
230d2906 | 12220 | catch (const gdb_exception_error &e) |
849f2b52 JB |
12221 | { |
12222 | warning (_("failed to reevaluate internal exception condition " | |
12223 | "for catchpoint %d: %s"), | |
3d6e9d23 | 12224 | c->number, e.what ()); |
849f2b52 | 12225 | } |
28010a5d PA |
12226 | } |
12227 | ||
b22e99fd | 12228 | ada_loc->excep_cond_expr = std::move (exp); |
28010a5d | 12229 | } |
28010a5d PA |
12230 | } |
12231 | ||
ae72050b TT |
12232 | /* Implement the ALLOCATE_LOCATION method in the structure for all |
12233 | exception catchpoint kinds. */ | |
28010a5d | 12234 | |
ae72050b TT |
12235 | struct bp_location * |
12236 | ada_catchpoint::allocate_location () | |
28010a5d | 12237 | { |
ae72050b | 12238 | return new ada_catchpoint_location (this); |
28010a5d PA |
12239 | } |
12240 | ||
ae72050b TT |
12241 | /* Implement the RE_SET method in the structure for all exception |
12242 | catchpoint kinds. */ | |
28010a5d | 12243 | |
ae72050b TT |
12244 | void |
12245 | ada_catchpoint::re_set () | |
28010a5d | 12246 | { |
28010a5d PA |
12247 | /* Call the base class's method. This updates the catchpoint's |
12248 | locations. */ | |
74421c0b | 12249 | this->code_breakpoint::re_set (); |
28010a5d PA |
12250 | |
12251 | /* Reparse the exception conditional expressions. One for each | |
12252 | location. */ | |
ae72050b | 12253 | create_excep_cond_exprs (this, m_kind); |
28010a5d PA |
12254 | } |
12255 | ||
12256 | /* Returns true if we should stop for this breakpoint hit. If the | |
12257 | user specified a specific exception, we only want to cause a stop | |
12258 | if the program thrown that exception. */ | |
12259 | ||
7ebaa5f7 | 12260 | static bool |
28010a5d PA |
12261 | should_stop_exception (const struct bp_location *bl) |
12262 | { | |
12263 | struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner; | |
12264 | const struct ada_catchpoint_location *ada_loc | |
12265 | = (const struct ada_catchpoint_location *) bl; | |
7ebaa5f7 | 12266 | bool stop; |
28010a5d | 12267 | |
37f6a7f4 TT |
12268 | struct internalvar *var = lookup_internalvar ("_ada_exception"); |
12269 | if (c->m_kind == ada_catch_assert) | |
12270 | clear_internalvar (var); | |
12271 | else | |
12272 | { | |
12273 | try | |
12274 | { | |
12275 | const char *expr; | |
12276 | ||
12277 | if (c->m_kind == ada_catch_handlers) | |
12278 | expr = ("GNAT_GCC_exception_Access(gcc_exception)" | |
12279 | ".all.occurrence.id"); | |
12280 | else | |
12281 | expr = "e"; | |
12282 | ||
12283 | struct value *exc = parse_and_eval (expr); | |
12284 | set_internalvar (var, exc); | |
12285 | } | |
12286 | catch (const gdb_exception_error &ex) | |
12287 | { | |
12288 | clear_internalvar (var); | |
12289 | } | |
12290 | } | |
12291 | ||
28010a5d | 12292 | /* With no specific exception, should always stop. */ |
bc18fbb5 | 12293 | if (c->excep_string.empty ()) |
7ebaa5f7 | 12294 | return true; |
28010a5d PA |
12295 | |
12296 | if (ada_loc->excep_cond_expr == NULL) | |
12297 | { | |
12298 | /* We will have a NULL expression if back when we were creating | |
12299 | the expressions, this location's had failed to parse. */ | |
7ebaa5f7 | 12300 | return true; |
28010a5d PA |
12301 | } |
12302 | ||
7ebaa5f7 | 12303 | stop = true; |
a70b8144 | 12304 | try |
28010a5d | 12305 | { |
65558ca5 | 12306 | scoped_value_mark mark; |
4d01a485 | 12307 | stop = value_true (evaluate_expression (ada_loc->excep_cond_expr.get ())); |
28010a5d | 12308 | } |
230d2906 | 12309 | catch (const gdb_exception &ex) |
492d29ea PA |
12310 | { |
12311 | exception_fprintf (gdb_stderr, ex, | |
12312 | _("Error in testing exception condition:\n")); | |
12313 | } | |
492d29ea | 12314 | |
28010a5d PA |
12315 | return stop; |
12316 | } | |
12317 | ||
ae72050b TT |
12318 | /* Implement the CHECK_STATUS method in the structure for all |
12319 | exception catchpoint kinds. */ | |
28010a5d | 12320 | |
ae72050b TT |
12321 | void |
12322 | ada_catchpoint::check_status (bpstat *bs) | |
28010a5d | 12323 | { |
b6433ede | 12324 | bs->stop = should_stop_exception (bs->bp_location_at.get ()); |
28010a5d PA |
12325 | } |
12326 | ||
ae72050b TT |
12327 | /* Implement the PRINT_IT method in the structure for all exception |
12328 | catchpoint kinds. */ | |
f7f9143b | 12329 | |
ae72050b | 12330 | enum print_stop_action |
7bd86313 | 12331 | ada_catchpoint::print_it (const bpstat *bs) const |
f7f9143b | 12332 | { |
79a45e25 | 12333 | struct ui_out *uiout = current_uiout; |
348d480f | 12334 | |
ae72050b | 12335 | annotate_catchpoint (number); |
f7f9143b | 12336 | |
112e8700 | 12337 | if (uiout->is_mi_like_p ()) |
f7f9143b | 12338 | { |
112e8700 | 12339 | uiout->field_string ("reason", |
956a9fb9 | 12340 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
ae72050b | 12341 | uiout->field_string ("disp", bpdisp_text (disposition)); |
f7f9143b JB |
12342 | } |
12343 | ||
ae72050b | 12344 | uiout->text (disposition == disp_del |
112e8700 | 12345 | ? "\nTemporary catchpoint " : "\nCatchpoint "); |
78805ff8 | 12346 | print_num_locno (bs, uiout); |
112e8700 | 12347 | uiout->text (", "); |
f7f9143b | 12348 | |
45db7c09 PA |
12349 | /* ada_exception_name_addr relies on the selected frame being the |
12350 | current frame. Need to do this here because this function may be | |
12351 | called more than once when printing a stop, and below, we'll | |
12352 | select the first frame past the Ada run-time (see | |
12353 | ada_find_printable_frame). */ | |
12354 | select_frame (get_current_frame ()); | |
12355 | ||
ae72050b | 12356 | switch (m_kind) |
f7f9143b | 12357 | { |
761269c8 JB |
12358 | case ada_catch_exception: |
12359 | case ada_catch_exception_unhandled: | |
9f757bf7 | 12360 | case ada_catch_handlers: |
956a9fb9 | 12361 | { |
7bd86313 | 12362 | const CORE_ADDR addr = ada_exception_name_addr (m_kind); |
956a9fb9 JB |
12363 | char exception_name[256]; |
12364 | ||
12365 | if (addr != 0) | |
12366 | { | |
c714b426 PA |
12367 | read_memory (addr, (gdb_byte *) exception_name, |
12368 | sizeof (exception_name) - 1); | |
956a9fb9 JB |
12369 | exception_name [sizeof (exception_name) - 1] = '\0'; |
12370 | } | |
12371 | else | |
12372 | { | |
12373 | /* For some reason, we were unable to read the exception | |
12374 | name. This could happen if the Runtime was compiled | |
12375 | without debugging info, for instance. In that case, | |
12376 | just replace the exception name by the generic string | |
12377 | "exception" - it will read as "an exception" in the | |
12378 | notification we are about to print. */ | |
967cff16 | 12379 | memcpy (exception_name, "exception", sizeof ("exception")); |
956a9fb9 JB |
12380 | } |
12381 | /* In the case of unhandled exception breakpoints, we print | |
12382 | the exception name as "unhandled EXCEPTION_NAME", to make | |
12383 | it clearer to the user which kind of catchpoint just got | |
12384 | hit. We used ui_out_text to make sure that this extra | |
12385 | info does not pollute the exception name in the MI case. */ | |
ae72050b | 12386 | if (m_kind == ada_catch_exception_unhandled) |
112e8700 SM |
12387 | uiout->text ("unhandled "); |
12388 | uiout->field_string ("exception-name", exception_name); | |
956a9fb9 JB |
12389 | } |
12390 | break; | |
761269c8 | 12391 | case ada_catch_assert: |
956a9fb9 JB |
12392 | /* In this case, the name of the exception is not really |
12393 | important. Just print "failed assertion" to make it clearer | |
12394 | that his program just hit an assertion-failure catchpoint. | |
12395 | We used ui_out_text because this info does not belong in | |
12396 | the MI output. */ | |
112e8700 | 12397 | uiout->text ("failed assertion"); |
956a9fb9 | 12398 | break; |
f7f9143b | 12399 | } |
e547c119 | 12400 | |
6f46ac85 | 12401 | gdb::unique_xmalloc_ptr<char> exception_message = ada_exception_message (); |
e547c119 JB |
12402 | if (exception_message != NULL) |
12403 | { | |
e547c119 | 12404 | uiout->text (" ("); |
6f46ac85 | 12405 | uiout->field_string ("exception-message", exception_message.get ()); |
e547c119 | 12406 | uiout->text (")"); |
e547c119 JB |
12407 | } |
12408 | ||
112e8700 | 12409 | uiout->text (" at "); |
956a9fb9 | 12410 | ada_find_printable_frame (get_current_frame ()); |
f7f9143b JB |
12411 | |
12412 | return PRINT_SRC_AND_LOC; | |
12413 | } | |
12414 | ||
ae72050b TT |
12415 | /* Implement the PRINT_ONE method in the structure for all exception |
12416 | catchpoint kinds. */ | |
f7f9143b | 12417 | |
ae72050b | 12418 | bool |
a67bcaba | 12419 | ada_catchpoint::print_one (bp_location **last_loc) const |
f7f9143b | 12420 | { |
79a45e25 | 12421 | struct ui_out *uiout = current_uiout; |
79a45b7d TT |
12422 | struct value_print_options opts; |
12423 | ||
12424 | get_user_print_options (&opts); | |
f06f1252 | 12425 | |
79a45b7d | 12426 | if (opts.addressprint) |
f06f1252 | 12427 | uiout->field_skip ("addr"); |
f7f9143b JB |
12428 | |
12429 | annotate_field (5); | |
ae72050b | 12430 | switch (m_kind) |
f7f9143b | 12431 | { |
761269c8 | 12432 | case ada_catch_exception: |
ae72050b | 12433 | if (!excep_string.empty ()) |
dda83cd7 | 12434 | { |
bc18fbb5 | 12435 | std::string msg = string_printf (_("`%s' Ada exception"), |
ae72050b | 12436 | excep_string.c_str ()); |
28010a5d | 12437 | |
dda83cd7 SM |
12438 | uiout->field_string ("what", msg); |
12439 | } | |
12440 | else | |
12441 | uiout->field_string ("what", "all Ada exceptions"); | |
12442 | ||
12443 | break; | |
f7f9143b | 12444 | |
761269c8 | 12445 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12446 | uiout->field_string ("what", "unhandled Ada exceptions"); |
12447 | break; | |
f7f9143b | 12448 | |
9f757bf7 | 12449 | case ada_catch_handlers: |
ae72050b | 12450 | if (!excep_string.empty ()) |
dda83cd7 | 12451 | { |
9f757bf7 XR |
12452 | uiout->field_fmt ("what", |
12453 | _("`%s' Ada exception handlers"), | |
ae72050b | 12454 | excep_string.c_str ()); |
dda83cd7 SM |
12455 | } |
12456 | else | |
9f757bf7 | 12457 | uiout->field_string ("what", "all Ada exceptions handlers"); |
dda83cd7 | 12458 | break; |
9f757bf7 | 12459 | |
761269c8 | 12460 | case ada_catch_assert: |
dda83cd7 SM |
12461 | uiout->field_string ("what", "failed Ada assertions"); |
12462 | break; | |
f7f9143b JB |
12463 | |
12464 | default: | |
f34652de | 12465 | internal_error (_("unexpected catchpoint type")); |
dda83cd7 | 12466 | break; |
f7f9143b | 12467 | } |
c01e038b TT |
12468 | |
12469 | return true; | |
f7f9143b JB |
12470 | } |
12471 | ||
12472 | /* Implement the PRINT_MENTION method in the breakpoint_ops structure | |
12473 | for all exception catchpoint kinds. */ | |
12474 | ||
ae72050b | 12475 | void |
b713485d | 12476 | ada_catchpoint::print_mention () const |
f7f9143b | 12477 | { |
79a45e25 | 12478 | struct ui_out *uiout = current_uiout; |
28010a5d | 12479 | |
ae72050b | 12480 | uiout->text (disposition == disp_del ? _("Temporary catchpoint ") |
dda83cd7 | 12481 | : _("Catchpoint ")); |
ae72050b | 12482 | uiout->field_signed ("bkptno", number); |
112e8700 | 12483 | uiout->text (": "); |
00eb2c4a | 12484 | |
ae72050b | 12485 | switch (m_kind) |
f7f9143b | 12486 | { |
761269c8 | 12487 | case ada_catch_exception: |
ae72050b | 12488 | if (!excep_string.empty ()) |
00eb2c4a | 12489 | { |
862d101a | 12490 | std::string info = string_printf (_("`%s' Ada exception"), |
ae72050b | 12491 | excep_string.c_str ()); |
4915bfdc | 12492 | uiout->text (info); |
00eb2c4a | 12493 | } |
dda83cd7 SM |
12494 | else |
12495 | uiout->text (_("all Ada exceptions")); | |
12496 | break; | |
f7f9143b | 12497 | |
761269c8 | 12498 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12499 | uiout->text (_("unhandled Ada exceptions")); |
12500 | break; | |
9f757bf7 XR |
12501 | |
12502 | case ada_catch_handlers: | |
ae72050b | 12503 | if (!excep_string.empty ()) |
9f757bf7 XR |
12504 | { |
12505 | std::string info | |
12506 | = string_printf (_("`%s' Ada exception handlers"), | |
ae72050b | 12507 | excep_string.c_str ()); |
4915bfdc | 12508 | uiout->text (info); |
9f757bf7 | 12509 | } |
dda83cd7 SM |
12510 | else |
12511 | uiout->text (_("all Ada exceptions handlers")); | |
12512 | break; | |
9f757bf7 | 12513 | |
761269c8 | 12514 | case ada_catch_assert: |
dda83cd7 SM |
12515 | uiout->text (_("failed Ada assertions")); |
12516 | break; | |
f7f9143b JB |
12517 | |
12518 | default: | |
f34652de | 12519 | internal_error (_("unexpected catchpoint type")); |
dda83cd7 | 12520 | break; |
f7f9143b JB |
12521 | } |
12522 | } | |
12523 | ||
ae72050b TT |
12524 | /* Implement the PRINT_RECREATE method in the structure for all |
12525 | exception catchpoint kinds. */ | |
6149aea9 | 12526 | |
ae72050b | 12527 | void |
4d1ae558 | 12528 | ada_catchpoint::print_recreate (struct ui_file *fp) const |
6149aea9 | 12529 | { |
ae72050b | 12530 | switch (m_kind) |
6149aea9 | 12531 | { |
761269c8 | 12532 | case ada_catch_exception: |
6cb06a8c | 12533 | gdb_printf (fp, "catch exception"); |
ae72050b TT |
12534 | if (!excep_string.empty ()) |
12535 | gdb_printf (fp, " %s", excep_string.c_str ()); | |
6149aea9 PA |
12536 | break; |
12537 | ||
761269c8 | 12538 | case ada_catch_exception_unhandled: |
6cb06a8c | 12539 | gdb_printf (fp, "catch exception unhandled"); |
6149aea9 PA |
12540 | break; |
12541 | ||
9f757bf7 | 12542 | case ada_catch_handlers: |
6cb06a8c | 12543 | gdb_printf (fp, "catch handlers"); |
9f757bf7 XR |
12544 | break; |
12545 | ||
761269c8 | 12546 | case ada_catch_assert: |
6cb06a8c | 12547 | gdb_printf (fp, "catch assert"); |
6149aea9 PA |
12548 | break; |
12549 | ||
12550 | default: | |
f34652de | 12551 | internal_error (_("unexpected catchpoint type")); |
6149aea9 | 12552 | } |
04d0163c | 12553 | print_recreate_thread (fp); |
6149aea9 PA |
12554 | } |
12555 | ||
f06f1252 TT |
12556 | /* See ada-lang.h. */ |
12557 | ||
12558 | bool | |
12559 | is_ada_exception_catchpoint (breakpoint *bp) | |
12560 | { | |
ae72050b | 12561 | return dynamic_cast<ada_catchpoint *> (bp) != nullptr; |
f06f1252 TT |
12562 | } |
12563 | ||
f7f9143b JB |
12564 | /* Split the arguments specified in a "catch exception" command. |
12565 | Set EX to the appropriate catchpoint type. | |
28010a5d | 12566 | Set EXCEP_STRING to the name of the specific exception if |
5845583d | 12567 | specified by the user. |
9f757bf7 XR |
12568 | IS_CATCH_HANDLERS_CMD: True if the arguments are for a |
12569 | "catch handlers" command. False otherwise. | |
5845583d JB |
12570 | If a condition is found at the end of the arguments, the condition |
12571 | expression is stored in COND_STRING (memory must be deallocated | |
12572 | after use). Otherwise COND_STRING is set to NULL. */ | |
f7f9143b JB |
12573 | |
12574 | static void | |
a121b7c1 | 12575 | catch_ada_exception_command_split (const char *args, |
9f757bf7 | 12576 | bool is_catch_handlers_cmd, |
dda83cd7 | 12577 | enum ada_exception_catchpoint_kind *ex, |
bc18fbb5 TT |
12578 | std::string *excep_string, |
12579 | std::string *cond_string) | |
f7f9143b | 12580 | { |
bc18fbb5 | 12581 | std::string exception_name; |
f7f9143b | 12582 | |
bc18fbb5 TT |
12583 | exception_name = extract_arg (&args); |
12584 | if (exception_name == "if") | |
5845583d JB |
12585 | { |
12586 | /* This is not an exception name; this is the start of a condition | |
12587 | expression for a catchpoint on all exceptions. So, "un-get" | |
12588 | this token, and set exception_name to NULL. */ | |
bc18fbb5 | 12589 | exception_name.clear (); |
5845583d JB |
12590 | args -= 2; |
12591 | } | |
f7f9143b | 12592 | |
5845583d | 12593 | /* Check to see if we have a condition. */ |
f7f9143b | 12594 | |
f1735a53 | 12595 | args = skip_spaces (args); |
61012eef | 12596 | if (startswith (args, "if") |
5845583d JB |
12597 | && (isspace (args[2]) || args[2] == '\0')) |
12598 | { | |
12599 | args += 2; | |
f1735a53 | 12600 | args = skip_spaces (args); |
5845583d JB |
12601 | |
12602 | if (args[0] == '\0') | |
dda83cd7 | 12603 | error (_("Condition missing after `if' keyword")); |
bc18fbb5 | 12604 | *cond_string = args; |
5845583d JB |
12605 | |
12606 | args += strlen (args); | |
12607 | } | |
12608 | ||
12609 | /* Check that we do not have any more arguments. Anything else | |
12610 | is unexpected. */ | |
f7f9143b JB |
12611 | |
12612 | if (args[0] != '\0') | |
12613 | error (_("Junk at end of expression")); | |
12614 | ||
9f757bf7 XR |
12615 | if (is_catch_handlers_cmd) |
12616 | { | |
12617 | /* Catch handling of exceptions. */ | |
12618 | *ex = ada_catch_handlers; | |
12619 | *excep_string = exception_name; | |
12620 | } | |
bc18fbb5 | 12621 | else if (exception_name.empty ()) |
f7f9143b JB |
12622 | { |
12623 | /* Catch all exceptions. */ | |
761269c8 | 12624 | *ex = ada_catch_exception; |
bc18fbb5 | 12625 | excep_string->clear (); |
f7f9143b | 12626 | } |
bc18fbb5 | 12627 | else if (exception_name == "unhandled") |
f7f9143b JB |
12628 | { |
12629 | /* Catch unhandled exceptions. */ | |
761269c8 | 12630 | *ex = ada_catch_exception_unhandled; |
bc18fbb5 | 12631 | excep_string->clear (); |
f7f9143b JB |
12632 | } |
12633 | else | |
12634 | { | |
12635 | /* Catch a specific exception. */ | |
761269c8 | 12636 | *ex = ada_catch_exception; |
28010a5d | 12637 | *excep_string = exception_name; |
f7f9143b JB |
12638 | } |
12639 | } | |
12640 | ||
12641 | /* Return the name of the symbol on which we should break in order to | |
12642 | implement a catchpoint of the EX kind. */ | |
12643 | ||
12644 | static const char * | |
761269c8 | 12645 | ada_exception_sym_name (enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12646 | { |
3eecfa55 JB |
12647 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
12648 | ||
12649 | gdb_assert (data->exception_info != NULL); | |
0259addd | 12650 | |
f7f9143b JB |
12651 | switch (ex) |
12652 | { | |
761269c8 | 12653 | case ada_catch_exception: |
dda83cd7 SM |
12654 | return (data->exception_info->catch_exception_sym); |
12655 | break; | |
761269c8 | 12656 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12657 | return (data->exception_info->catch_exception_unhandled_sym); |
12658 | break; | |
761269c8 | 12659 | case ada_catch_assert: |
dda83cd7 SM |
12660 | return (data->exception_info->catch_assert_sym); |
12661 | break; | |
9f757bf7 | 12662 | case ada_catch_handlers: |
dda83cd7 SM |
12663 | return (data->exception_info->catch_handlers_sym); |
12664 | break; | |
f7f9143b | 12665 | default: |
f34652de | 12666 | internal_error (_("unexpected catchpoint kind (%d)"), ex); |
f7f9143b JB |
12667 | } |
12668 | } | |
12669 | ||
f7f9143b JB |
12670 | /* Return the condition that will be used to match the current exception |
12671 | being raised with the exception that the user wants to catch. This | |
12672 | assumes that this condition is used when the inferior just triggered | |
12673 | an exception catchpoint. | |
cb7de75e | 12674 | EX: the type of catchpoints used for catching Ada exceptions. */ |
f7f9143b | 12675 | |
cb7de75e | 12676 | static std::string |
9f757bf7 | 12677 | ada_exception_catchpoint_cond_string (const char *excep_string, |
dda83cd7 | 12678 | enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12679 | { |
fccf9de1 | 12680 | bool is_standard_exc = false; |
cb7de75e | 12681 | std::string result; |
9f757bf7 XR |
12682 | |
12683 | if (ex == ada_catch_handlers) | |
12684 | { | |
12685 | /* For exception handlers catchpoints, the condition string does | |
dda83cd7 | 12686 | not use the same parameter as for the other exceptions. */ |
fccf9de1 TT |
12687 | result = ("long_integer (GNAT_GCC_exception_Access" |
12688 | "(gcc_exception).all.occurrence.id)"); | |
9f757bf7 XR |
12689 | } |
12690 | else | |
fccf9de1 | 12691 | result = "long_integer (e)"; |
3d0b0fa3 | 12692 | |
0963b4bd | 12693 | /* The standard exceptions are a special case. They are defined in |
3d0b0fa3 | 12694 | runtime units that have been compiled without debugging info; if |
28010a5d | 12695 | EXCEP_STRING is the not-fully-qualified name of a standard |
3d0b0fa3 JB |
12696 | exception (e.g. "constraint_error") then, during the evaluation |
12697 | of the condition expression, the symbol lookup on this name would | |
0963b4bd | 12698 | *not* return this standard exception. The catchpoint condition |
3d0b0fa3 JB |
12699 | may then be set only on user-defined exceptions which have the |
12700 | same not-fully-qualified name (e.g. my_package.constraint_error). | |
12701 | ||
12702 | To avoid this unexcepted behavior, these standard exceptions are | |
0963b4bd | 12703 | systematically prefixed by "standard". This means that "catch |
3d0b0fa3 JB |
12704 | exception constraint_error" is rewritten into "catch exception |
12705 | standard.constraint_error". | |
12706 | ||
85102364 | 12707 | If an exception named constraint_error is defined in another package of |
3d0b0fa3 JB |
12708 | the inferior program, then the only way to specify this exception as a |
12709 | breakpoint condition is to use its fully-qualified named: | |
fccf9de1 | 12710 | e.g. my_package.constraint_error. */ |
3d0b0fa3 | 12711 | |
696d6f4d | 12712 | for (const char *name : standard_exc) |
3d0b0fa3 | 12713 | { |
696d6f4d | 12714 | if (strcmp (name, excep_string) == 0) |
3d0b0fa3 | 12715 | { |
fccf9de1 | 12716 | is_standard_exc = true; |
9f757bf7 | 12717 | break; |
3d0b0fa3 JB |
12718 | } |
12719 | } | |
9f757bf7 | 12720 | |
fccf9de1 TT |
12721 | result += " = "; |
12722 | ||
12723 | if (is_standard_exc) | |
12724 | string_appendf (result, "long_integer (&standard.%s)", excep_string); | |
12725 | else | |
12726 | string_appendf (result, "long_integer (&%s)", excep_string); | |
9f757bf7 | 12727 | |
9f757bf7 | 12728 | return result; |
f7f9143b JB |
12729 | } |
12730 | ||
12731 | /* Return the symtab_and_line that should be used to insert an exception | |
12732 | catchpoint of the TYPE kind. | |
12733 | ||
28010a5d PA |
12734 | ADDR_STRING returns the name of the function where the real |
12735 | breakpoint that implements the catchpoints is set, depending on the | |
12736 | type of catchpoint we need to create. */ | |
f7f9143b JB |
12737 | |
12738 | static struct symtab_and_line | |
bc18fbb5 | 12739 | ada_exception_sal (enum ada_exception_catchpoint_kind ex, |
ae72050b | 12740 | std::string *addr_string) |
f7f9143b JB |
12741 | { |
12742 | const char *sym_name; | |
12743 | struct symbol *sym; | |
f7f9143b | 12744 | |
0259addd JB |
12745 | /* First, find out which exception support info to use. */ |
12746 | ada_exception_support_info_sniffer (); | |
12747 | ||
12748 | /* Then lookup the function on which we will break in order to catch | |
f7f9143b | 12749 | the Ada exceptions requested by the user. */ |
f7f9143b JB |
12750 | sym_name = ada_exception_sym_name (ex); |
12751 | sym = standard_lookup (sym_name, NULL, VAR_DOMAIN); | |
12752 | ||
57aff202 JB |
12753 | if (sym == NULL) |
12754 | error (_("Catchpoint symbol not found: %s"), sym_name); | |
12755 | ||
66d7f48f | 12756 | if (sym->aclass () != LOC_BLOCK) |
57aff202 | 12757 | error (_("Unable to insert catchpoint. %s is not a function."), sym_name); |
f7f9143b JB |
12758 | |
12759 | /* Set ADDR_STRING. */ | |
cc12f4a8 | 12760 | *addr_string = sym_name; |
f7f9143b | 12761 | |
f17011e0 | 12762 | return find_function_start_sal (sym, 1); |
f7f9143b JB |
12763 | } |
12764 | ||
b4a5b78b | 12765 | /* Create an Ada exception catchpoint. |
f7f9143b | 12766 | |
b4a5b78b | 12767 | EX_KIND is the kind of exception catchpoint to be created. |
5845583d | 12768 | |
bc18fbb5 | 12769 | If EXCEPT_STRING is empty, this catchpoint is expected to trigger |
2df4d1d5 | 12770 | for all exceptions. Otherwise, EXCEPT_STRING indicates the name |
bc18fbb5 | 12771 | of the exception to which this catchpoint applies. |
2df4d1d5 | 12772 | |
bc18fbb5 | 12773 | COND_STRING, if not empty, is the catchpoint condition. |
f7f9143b | 12774 | |
b4a5b78b JB |
12775 | TEMPFLAG, if nonzero, means that the underlying breakpoint |
12776 | should be temporary. | |
28010a5d | 12777 | |
b4a5b78b | 12778 | FROM_TTY is the usual argument passed to all commands implementations. */ |
28010a5d | 12779 | |
349774ef | 12780 | void |
28010a5d | 12781 | create_ada_exception_catchpoint (struct gdbarch *gdbarch, |
761269c8 | 12782 | enum ada_exception_catchpoint_kind ex_kind, |
bc18fbb5 | 12783 | const std::string &excep_string, |
56ecd069 | 12784 | const std::string &cond_string, |
28010a5d | 12785 | int tempflag, |
349774ef | 12786 | int disabled, |
28010a5d PA |
12787 | int from_tty) |
12788 | { | |
cc12f4a8 | 12789 | std::string addr_string; |
ae72050b | 12790 | struct symtab_and_line sal = ada_exception_sal (ex_kind, &addr_string); |
28010a5d | 12791 | |
bd21b6c9 PA |
12792 | std::unique_ptr<ada_catchpoint> c |
12793 | (new ada_catchpoint (gdbarch, ex_kind, sal, addr_string.c_str (), | |
12794 | tempflag, disabled, from_tty)); | |
28010a5d | 12795 | c->excep_string = excep_string; |
9f757bf7 | 12796 | create_excep_cond_exprs (c.get (), ex_kind); |
56ecd069 | 12797 | if (!cond_string.empty ()) |
733d554a | 12798 | set_breakpoint_condition (c.get (), cond_string.c_str (), from_tty, false); |
b270e6f9 | 12799 | install_breakpoint (0, std::move (c), 1); |
f7f9143b JB |
12800 | } |
12801 | ||
9ac4176b PA |
12802 | /* Implement the "catch exception" command. */ |
12803 | ||
12804 | static void | |
eb4c3f4a | 12805 | catch_ada_exception_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12806 | struct cmd_list_element *command) |
12807 | { | |
a121b7c1 | 12808 | const char *arg = arg_entry; |
9ac4176b PA |
12809 | struct gdbarch *gdbarch = get_current_arch (); |
12810 | int tempflag; | |
761269c8 | 12811 | enum ada_exception_catchpoint_kind ex_kind; |
bc18fbb5 | 12812 | std::string excep_string; |
56ecd069 | 12813 | std::string cond_string; |
9ac4176b | 12814 | |
0f8e2034 | 12815 | tempflag = command->context () == CATCH_TEMPORARY; |
9ac4176b PA |
12816 | |
12817 | if (!arg) | |
12818 | arg = ""; | |
9f757bf7 | 12819 | catch_ada_exception_command_split (arg, false, &ex_kind, &excep_string, |
bc18fbb5 | 12820 | &cond_string); |
9f757bf7 XR |
12821 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12822 | excep_string, cond_string, | |
12823 | tempflag, 1 /* enabled */, | |
12824 | from_tty); | |
12825 | } | |
12826 | ||
12827 | /* Implement the "catch handlers" command. */ | |
12828 | ||
12829 | static void | |
12830 | catch_ada_handlers_command (const char *arg_entry, int from_tty, | |
12831 | struct cmd_list_element *command) | |
12832 | { | |
12833 | const char *arg = arg_entry; | |
12834 | struct gdbarch *gdbarch = get_current_arch (); | |
12835 | int tempflag; | |
12836 | enum ada_exception_catchpoint_kind ex_kind; | |
bc18fbb5 | 12837 | std::string excep_string; |
56ecd069 | 12838 | std::string cond_string; |
9f757bf7 | 12839 | |
0f8e2034 | 12840 | tempflag = command->context () == CATCH_TEMPORARY; |
9f757bf7 XR |
12841 | |
12842 | if (!arg) | |
12843 | arg = ""; | |
12844 | catch_ada_exception_command_split (arg, true, &ex_kind, &excep_string, | |
bc18fbb5 | 12845 | &cond_string); |
b4a5b78b JB |
12846 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12847 | excep_string, cond_string, | |
349774ef JB |
12848 | tempflag, 1 /* enabled */, |
12849 | from_tty); | |
9ac4176b PA |
12850 | } |
12851 | ||
71bed2db TT |
12852 | /* Completion function for the Ada "catch" commands. */ |
12853 | ||
12854 | static void | |
12855 | catch_ada_completer (struct cmd_list_element *cmd, completion_tracker &tracker, | |
12856 | const char *text, const char *word) | |
12857 | { | |
12858 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (NULL); | |
12859 | ||
12860 | for (const ada_exc_info &info : exceptions) | |
12861 | { | |
12862 | if (startswith (info.name, word)) | |
b02f78f9 | 12863 | tracker.add_completion (make_unique_xstrdup (info.name)); |
71bed2db TT |
12864 | } |
12865 | } | |
12866 | ||
b4a5b78b | 12867 | /* Split the arguments specified in a "catch assert" command. |
5845583d | 12868 | |
b4a5b78b JB |
12869 | ARGS contains the command's arguments (or the empty string if |
12870 | no arguments were passed). | |
5845583d JB |
12871 | |
12872 | If ARGS contains a condition, set COND_STRING to that condition | |
b4a5b78b | 12873 | (the memory needs to be deallocated after use). */ |
5845583d | 12874 | |
b4a5b78b | 12875 | static void |
56ecd069 | 12876 | catch_ada_assert_command_split (const char *args, std::string &cond_string) |
f7f9143b | 12877 | { |
f1735a53 | 12878 | args = skip_spaces (args); |
f7f9143b | 12879 | |
5845583d | 12880 | /* Check whether a condition was provided. */ |
61012eef | 12881 | if (startswith (args, "if") |
5845583d | 12882 | && (isspace (args[2]) || args[2] == '\0')) |
f7f9143b | 12883 | { |
5845583d | 12884 | args += 2; |
f1735a53 | 12885 | args = skip_spaces (args); |
5845583d | 12886 | if (args[0] == '\0') |
dda83cd7 | 12887 | error (_("condition missing after `if' keyword")); |
56ecd069 | 12888 | cond_string.assign (args); |
f7f9143b JB |
12889 | } |
12890 | ||
5845583d JB |
12891 | /* Otherwise, there should be no other argument at the end of |
12892 | the command. */ | |
12893 | else if (args[0] != '\0') | |
12894 | error (_("Junk at end of arguments.")); | |
f7f9143b JB |
12895 | } |
12896 | ||
9ac4176b PA |
12897 | /* Implement the "catch assert" command. */ |
12898 | ||
12899 | static void | |
eb4c3f4a | 12900 | catch_assert_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12901 | struct cmd_list_element *command) |
12902 | { | |
a121b7c1 | 12903 | const char *arg = arg_entry; |
9ac4176b PA |
12904 | struct gdbarch *gdbarch = get_current_arch (); |
12905 | int tempflag; | |
56ecd069 | 12906 | std::string cond_string; |
9ac4176b | 12907 | |
0f8e2034 | 12908 | tempflag = command->context () == CATCH_TEMPORARY; |
9ac4176b PA |
12909 | |
12910 | if (!arg) | |
12911 | arg = ""; | |
56ecd069 | 12912 | catch_ada_assert_command_split (arg, cond_string); |
761269c8 | 12913 | create_ada_exception_catchpoint (gdbarch, ada_catch_assert, |
241db429 | 12914 | "", cond_string, |
349774ef JB |
12915 | tempflag, 1 /* enabled */, |
12916 | from_tty); | |
9ac4176b | 12917 | } |
778865d3 JB |
12918 | |
12919 | /* Return non-zero if the symbol SYM is an Ada exception object. */ | |
12920 | ||
12921 | static int | |
12922 | ada_is_exception_sym (struct symbol *sym) | |
12923 | { | |
5f9c5a63 | 12924 | const char *type_name = sym->type ()->name (); |
778865d3 | 12925 | |
66d7f48f SM |
12926 | return (sym->aclass () != LOC_TYPEDEF |
12927 | && sym->aclass () != LOC_BLOCK | |
12928 | && sym->aclass () != LOC_CONST | |
12929 | && sym->aclass () != LOC_UNRESOLVED | |
dda83cd7 | 12930 | && type_name != NULL && strcmp (type_name, "exception") == 0); |
778865d3 JB |
12931 | } |
12932 | ||
12933 | /* Given a global symbol SYM, return non-zero iff SYM is a non-standard | |
12934 | Ada exception object. This matches all exceptions except the ones | |
12935 | defined by the Ada language. */ | |
12936 | ||
12937 | static int | |
12938 | ada_is_non_standard_exception_sym (struct symbol *sym) | |
12939 | { | |
778865d3 JB |
12940 | if (!ada_is_exception_sym (sym)) |
12941 | return 0; | |
12942 | ||
696d6f4d TT |
12943 | for (const char *name : standard_exc) |
12944 | if (strcmp (sym->linkage_name (), name) == 0) | |
778865d3 JB |
12945 | return 0; /* A standard exception. */ |
12946 | ||
12947 | /* Numeric_Error is also a standard exception, so exclude it. | |
12948 | See the STANDARD_EXC description for more details as to why | |
12949 | this exception is not listed in that array. */ | |
987012b8 | 12950 | if (strcmp (sym->linkage_name (), "numeric_error") == 0) |
778865d3 JB |
12951 | return 0; |
12952 | ||
12953 | return 1; | |
12954 | } | |
12955 | ||
ab816a27 | 12956 | /* A helper function for std::sort, comparing two struct ada_exc_info |
778865d3 JB |
12957 | objects. |
12958 | ||
12959 | The comparison is determined first by exception name, and then | |
12960 | by exception address. */ | |
12961 | ||
ab816a27 | 12962 | bool |
cc536b21 | 12963 | ada_exc_info::operator< (const ada_exc_info &other) const |
778865d3 | 12964 | { |
778865d3 JB |
12965 | int result; |
12966 | ||
ab816a27 TT |
12967 | result = strcmp (name, other.name); |
12968 | if (result < 0) | |
12969 | return true; | |
12970 | if (result == 0 && addr < other.addr) | |
12971 | return true; | |
12972 | return false; | |
12973 | } | |
778865d3 | 12974 | |
ab816a27 | 12975 | bool |
cc536b21 | 12976 | ada_exc_info::operator== (const ada_exc_info &other) const |
ab816a27 TT |
12977 | { |
12978 | return addr == other.addr && strcmp (name, other.name) == 0; | |
778865d3 JB |
12979 | } |
12980 | ||
12981 | /* Sort EXCEPTIONS using compare_ada_exception_info as the comparison | |
12982 | routine, but keeping the first SKIP elements untouched. | |
12983 | ||
12984 | All duplicates are also removed. */ | |
12985 | ||
12986 | static void | |
ab816a27 | 12987 | sort_remove_dups_ada_exceptions_list (std::vector<ada_exc_info> *exceptions, |
778865d3 JB |
12988 | int skip) |
12989 | { | |
ab816a27 TT |
12990 | std::sort (exceptions->begin () + skip, exceptions->end ()); |
12991 | exceptions->erase (std::unique (exceptions->begin () + skip, exceptions->end ()), | |
12992 | exceptions->end ()); | |
778865d3 JB |
12993 | } |
12994 | ||
778865d3 JB |
12995 | /* Add all exceptions defined by the Ada standard whose name match |
12996 | a regular expression. | |
12997 | ||
12998 | If PREG is not NULL, then this regexp_t object is used to | |
12999 | perform the symbol name matching. Otherwise, no name-based | |
13000 | filtering is performed. | |
13001 | ||
13002 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13003 | gets pushed. */ | |
13004 | ||
13005 | static void | |
2d7cc5c7 | 13006 | ada_add_standard_exceptions (compiled_regex *preg, |
ab816a27 | 13007 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13008 | { |
696d6f4d | 13009 | for (const char *name : standard_exc) |
778865d3 | 13010 | { |
696d6f4d | 13011 | if (preg == NULL || preg->exec (name, 0, NULL, 0) == 0) |
778865d3 | 13012 | { |
4326580d MM |
13013 | symbol_name_match_type match_type = name_match_type_from_name (name); |
13014 | lookup_name_info lookup_name (name, match_type); | |
778865d3 | 13015 | |
4326580d MM |
13016 | symbol_name_matcher_ftype *match_name |
13017 | = ada_get_symbol_name_matcher (lookup_name); | |
778865d3 | 13018 | |
4326580d MM |
13019 | /* Iterate over all objfiles irrespective of scope or linker |
13020 | namespaces so we get all exceptions anywhere in the | |
13021 | progspace. */ | |
13022 | for (objfile *objfile : current_program_space->objfiles ()) | |
13023 | { | |
13024 | for (minimal_symbol *msymbol : objfile->msymbols ()) | |
13025 | { | |
13026 | if (match_name (msymbol->linkage_name (), lookup_name, | |
13027 | nullptr) | |
13028 | && msymbol->type () != mst_solib_trampoline) | |
13029 | { | |
13030 | ada_exc_info info | |
13031 | = {name, msymbol->value_address (objfile)}; | |
13032 | ||
13033 | exceptions->push_back (info); | |
13034 | } | |
13035 | } | |
778865d3 JB |
13036 | } |
13037 | } | |
13038 | } | |
13039 | } | |
13040 | ||
13041 | /* Add all Ada exceptions defined locally and accessible from the given | |
13042 | FRAME. | |
13043 | ||
13044 | If PREG is not NULL, then this regexp_t object is used to | |
13045 | perform the symbol name matching. Otherwise, no name-based | |
13046 | filtering is performed. | |
13047 | ||
13048 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13049 | gets pushed. */ | |
13050 | ||
13051 | static void | |
2d7cc5c7 | 13052 | ada_add_exceptions_from_frame (compiled_regex *preg, |
bd2b40ac | 13053 | frame_info_ptr frame, |
ab816a27 | 13054 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13055 | { |
3977b71f | 13056 | const struct block *block = get_frame_block (frame, 0); |
778865d3 JB |
13057 | |
13058 | while (block != 0) | |
13059 | { | |
13060 | struct block_iterator iter; | |
13061 | struct symbol *sym; | |
13062 | ||
13063 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
13064 | { | |
66d7f48f | 13065 | switch (sym->aclass ()) |
778865d3 JB |
13066 | { |
13067 | case LOC_TYPEDEF: | |
13068 | case LOC_BLOCK: | |
13069 | case LOC_CONST: | |
13070 | break; | |
13071 | default: | |
13072 | if (ada_is_exception_sym (sym)) | |
13073 | { | |
987012b8 | 13074 | struct ada_exc_info info = {sym->print_name (), |
4aeddc50 | 13075 | sym->value_address ()}; |
778865d3 | 13076 | |
ab816a27 | 13077 | exceptions->push_back (info); |
778865d3 JB |
13078 | } |
13079 | } | |
13080 | } | |
6c00f721 | 13081 | if (block->function () != NULL) |
778865d3 | 13082 | break; |
f135fe72 | 13083 | block = block->superblock (); |
778865d3 JB |
13084 | } |
13085 | } | |
13086 | ||
14bc53a8 PA |
13087 | /* Return true if NAME matches PREG or if PREG is NULL. */ |
13088 | ||
13089 | static bool | |
2d7cc5c7 | 13090 | name_matches_regex (const char *name, compiled_regex *preg) |
14bc53a8 PA |
13091 | { |
13092 | return (preg == NULL | |
f945dedf | 13093 | || preg->exec (ada_decode (name).c_str (), 0, NULL, 0) == 0); |
14bc53a8 PA |
13094 | } |
13095 | ||
778865d3 JB |
13096 | /* Add all exceptions defined globally whose name name match |
13097 | a regular expression, excluding standard exceptions. | |
13098 | ||
13099 | The reason we exclude standard exceptions is that they need | |
13100 | to be handled separately: Standard exceptions are defined inside | |
13101 | a runtime unit which is normally not compiled with debugging info, | |
13102 | and thus usually do not show up in our symbol search. However, | |
13103 | if the unit was in fact built with debugging info, we need to | |
13104 | exclude them because they would duplicate the entry we found | |
13105 | during the special loop that specifically searches for those | |
13106 | standard exceptions. | |
13107 | ||
13108 | If PREG is not NULL, then this regexp_t object is used to | |
13109 | perform the symbol name matching. Otherwise, no name-based | |
13110 | filtering is performed. | |
13111 | ||
13112 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13113 | gets pushed. */ | |
13114 | ||
13115 | static void | |
2d7cc5c7 | 13116 | ada_add_global_exceptions (compiled_regex *preg, |
ab816a27 | 13117 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13118 | { |
14bc53a8 PA |
13119 | /* In Ada, the symbol "search name" is a linkage name, whereas the |
13120 | regular expression used to do the matching refers to the natural | |
13121 | name. So match against the decoded name. */ | |
13122 | expand_symtabs_matching (NULL, | |
b5ec771e | 13123 | lookup_name_info::match_any (), |
14bc53a8 PA |
13124 | [&] (const char *search_name) |
13125 | { | |
f945dedf CB |
13126 | std::string decoded = ada_decode (search_name); |
13127 | return name_matches_regex (decoded.c_str (), preg); | |
14bc53a8 PA |
13128 | }, |
13129 | NULL, | |
03a8ea51 | 13130 | SEARCH_GLOBAL_BLOCK | SEARCH_STATIC_BLOCK, |
14bc53a8 | 13131 | VARIABLES_DOMAIN); |
778865d3 | 13132 | |
4326580d MM |
13133 | /* Iterate over all objfiles irrespective of scope or linker namespaces |
13134 | so we get all exceptions anywhere in the progspace. */ | |
2030c079 | 13135 | for (objfile *objfile : current_program_space->objfiles ()) |
778865d3 | 13136 | { |
b669c953 | 13137 | for (compunit_symtab *s : objfile->compunits ()) |
778865d3 | 13138 | { |
af39c5c8 | 13139 | const struct blockvector *bv = s->blockvector (); |
d8aeb77f | 13140 | int i; |
778865d3 | 13141 | |
d8aeb77f TT |
13142 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
13143 | { | |
63d609de | 13144 | const struct block *b = bv->block (i); |
d8aeb77f TT |
13145 | struct block_iterator iter; |
13146 | struct symbol *sym; | |
778865d3 | 13147 | |
d8aeb77f TT |
13148 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
13149 | if (ada_is_non_standard_exception_sym (sym) | |
987012b8 | 13150 | && name_matches_regex (sym->natural_name (), preg)) |
d8aeb77f TT |
13151 | { |
13152 | struct ada_exc_info info | |
4aeddc50 | 13153 | = {sym->print_name (), sym->value_address ()}; |
d8aeb77f TT |
13154 | |
13155 | exceptions->push_back (info); | |
13156 | } | |
13157 | } | |
778865d3 JB |
13158 | } |
13159 | } | |
13160 | } | |
13161 | ||
13162 | /* Implements ada_exceptions_list with the regular expression passed | |
13163 | as a regex_t, rather than a string. | |
13164 | ||
13165 | If not NULL, PREG is used to filter out exceptions whose names | |
13166 | do not match. Otherwise, all exceptions are listed. */ | |
13167 | ||
ab816a27 | 13168 | static std::vector<ada_exc_info> |
2d7cc5c7 | 13169 | ada_exceptions_list_1 (compiled_regex *preg) |
778865d3 | 13170 | { |
ab816a27 | 13171 | std::vector<ada_exc_info> result; |
778865d3 JB |
13172 | int prev_len; |
13173 | ||
13174 | /* First, list the known standard exceptions. These exceptions | |
13175 | need to be handled separately, as they are usually defined in | |
13176 | runtime units that have been compiled without debugging info. */ | |
13177 | ||
13178 | ada_add_standard_exceptions (preg, &result); | |
13179 | ||
13180 | /* Next, find all exceptions whose scope is local and accessible | |
13181 | from the currently selected frame. */ | |
13182 | ||
13183 | if (has_stack_frames ()) | |
13184 | { | |
ab816a27 | 13185 | prev_len = result.size (); |
778865d3 JB |
13186 | ada_add_exceptions_from_frame (preg, get_selected_frame (NULL), |
13187 | &result); | |
ab816a27 | 13188 | if (result.size () > prev_len) |
778865d3 JB |
13189 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13190 | } | |
13191 | ||
13192 | /* Add all exceptions whose scope is global. */ | |
13193 | ||
ab816a27 | 13194 | prev_len = result.size (); |
778865d3 | 13195 | ada_add_global_exceptions (preg, &result); |
ab816a27 | 13196 | if (result.size () > prev_len) |
778865d3 JB |
13197 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13198 | ||
778865d3 JB |
13199 | return result; |
13200 | } | |
13201 | ||
13202 | /* Return a vector of ada_exc_info. | |
13203 | ||
13204 | If REGEXP is NULL, all exceptions are included in the result. | |
13205 | Otherwise, it should contain a valid regular expression, | |
13206 | and only the exceptions whose names match that regular expression | |
13207 | are included in the result. | |
13208 | ||
13209 | The exceptions are sorted in the following order: | |
13210 | - Standard exceptions (defined by the Ada language), in | |
13211 | alphabetical order; | |
13212 | - Exceptions only visible from the current frame, in | |
13213 | alphabetical order; | |
13214 | - Exceptions whose scope is global, in alphabetical order. */ | |
13215 | ||
ab816a27 | 13216 | std::vector<ada_exc_info> |
778865d3 JB |
13217 | ada_exceptions_list (const char *regexp) |
13218 | { | |
2d7cc5c7 PA |
13219 | if (regexp == NULL) |
13220 | return ada_exceptions_list_1 (NULL); | |
778865d3 | 13221 | |
2d7cc5c7 PA |
13222 | compiled_regex reg (regexp, REG_NOSUB, _("invalid regular expression")); |
13223 | return ada_exceptions_list_1 (®); | |
778865d3 JB |
13224 | } |
13225 | ||
13226 | /* Implement the "info exceptions" command. */ | |
13227 | ||
13228 | static void | |
1d12d88f | 13229 | info_exceptions_command (const char *regexp, int from_tty) |
778865d3 | 13230 | { |
778865d3 | 13231 | struct gdbarch *gdbarch = get_current_arch (); |
778865d3 | 13232 | |
ab816a27 | 13233 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (regexp); |
778865d3 JB |
13234 | |
13235 | if (regexp != NULL) | |
6cb06a8c | 13236 | gdb_printf |
778865d3 JB |
13237 | (_("All Ada exceptions matching regular expression \"%s\":\n"), regexp); |
13238 | else | |
6cb06a8c | 13239 | gdb_printf (_("All defined Ada exceptions:\n")); |
778865d3 | 13240 | |
ab816a27 | 13241 | for (const ada_exc_info &info : exceptions) |
6cb06a8c | 13242 | gdb_printf ("%s: %s\n", info.name, paddress (gdbarch, info.addr)); |
778865d3 JB |
13243 | } |
13244 | ||
6c038f32 PH |
13245 | \f |
13246 | /* Language vector */ | |
13247 | ||
b5ec771e PA |
13248 | /* symbol_name_matcher_ftype adapter for wild_match. */ |
13249 | ||
13250 | static bool | |
13251 | do_wild_match (const char *symbol_search_name, | |
13252 | const lookup_name_info &lookup_name, | |
a207cff2 | 13253 | completion_match_result *comp_match_res) |
b5ec771e PA |
13254 | { |
13255 | return wild_match (symbol_search_name, ada_lookup_name (lookup_name)); | |
13256 | } | |
13257 | ||
13258 | /* symbol_name_matcher_ftype adapter for full_match. */ | |
13259 | ||
13260 | static bool | |
13261 | do_full_match (const char *symbol_search_name, | |
13262 | const lookup_name_info &lookup_name, | |
a207cff2 | 13263 | completion_match_result *comp_match_res) |
b5ec771e | 13264 | { |
959d6a67 TT |
13265 | const char *lname = lookup_name.ada ().lookup_name ().c_str (); |
13266 | ||
13267 | /* If both symbols start with "_ada_", just let the loop below | |
13268 | handle the comparison. However, if only the symbol name starts | |
13269 | with "_ada_", skip the prefix and let the match proceed as | |
13270 | usual. */ | |
13271 | if (startswith (symbol_search_name, "_ada_") | |
13272 | && !startswith (lname, "_ada")) | |
86b44259 | 13273 | symbol_search_name += 5; |
81eaa506 TT |
13274 | /* Likewise for ghost entities. */ |
13275 | if (startswith (symbol_search_name, "___ghost_") | |
13276 | && !startswith (lname, "___ghost_")) | |
13277 | symbol_search_name += 9; | |
86b44259 | 13278 | |
86b44259 TT |
13279 | int uscore_count = 0; |
13280 | while (*lname != '\0') | |
13281 | { | |
13282 | if (*symbol_search_name != *lname) | |
13283 | { | |
13284 | if (*symbol_search_name == 'B' && uscore_count == 2 | |
13285 | && symbol_search_name[1] == '_') | |
13286 | { | |
13287 | symbol_search_name += 2; | |
13288 | while (isdigit (*symbol_search_name)) | |
13289 | ++symbol_search_name; | |
13290 | if (symbol_search_name[0] == '_' | |
13291 | && symbol_search_name[1] == '_') | |
13292 | { | |
13293 | symbol_search_name += 2; | |
13294 | continue; | |
13295 | } | |
13296 | } | |
13297 | return false; | |
13298 | } | |
13299 | ||
13300 | if (*symbol_search_name == '_') | |
13301 | ++uscore_count; | |
13302 | else | |
13303 | uscore_count = 0; | |
13304 | ||
13305 | ++symbol_search_name; | |
13306 | ++lname; | |
13307 | } | |
13308 | ||
13309 | return is_name_suffix (symbol_search_name); | |
b5ec771e PA |
13310 | } |
13311 | ||
a2cd4f14 JB |
13312 | /* symbol_name_matcher_ftype for exact (verbatim) matches. */ |
13313 | ||
13314 | static bool | |
13315 | do_exact_match (const char *symbol_search_name, | |
13316 | const lookup_name_info &lookup_name, | |
13317 | completion_match_result *comp_match_res) | |
13318 | { | |
13319 | return strcmp (symbol_search_name, ada_lookup_name (lookup_name)) == 0; | |
13320 | } | |
13321 | ||
b5ec771e PA |
13322 | /* Build the Ada lookup name for LOOKUP_NAME. */ |
13323 | ||
13324 | ada_lookup_name_info::ada_lookup_name_info (const lookup_name_info &lookup_name) | |
13325 | { | |
e0802d59 | 13326 | gdb::string_view user_name = lookup_name.name (); |
b5ec771e | 13327 | |
6a780b67 | 13328 | if (!user_name.empty () && user_name[0] == '<') |
b5ec771e PA |
13329 | { |
13330 | if (user_name.back () == '>') | |
e0802d59 | 13331 | m_encoded_name |
5ac58899 | 13332 | = gdb::to_string (user_name.substr (1, user_name.size () - 2)); |
b5ec771e | 13333 | else |
e0802d59 | 13334 | m_encoded_name |
5ac58899 | 13335 | = gdb::to_string (user_name.substr (1, user_name.size () - 1)); |
b5ec771e PA |
13336 | m_encoded_p = true; |
13337 | m_verbatim_p = true; | |
13338 | m_wild_match_p = false; | |
13339 | m_standard_p = false; | |
13340 | } | |
13341 | else | |
13342 | { | |
13343 | m_verbatim_p = false; | |
13344 | ||
e0802d59 | 13345 | m_encoded_p = user_name.find ("__") != gdb::string_view::npos; |
b5ec771e PA |
13346 | |
13347 | if (!m_encoded_p) | |
13348 | { | |
e0802d59 | 13349 | const char *folded = ada_fold_name (user_name); |
5c4258f4 TT |
13350 | m_encoded_name = ada_encode_1 (folded, false); |
13351 | if (m_encoded_name.empty ()) | |
5ac58899 | 13352 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13353 | } |
13354 | else | |
5ac58899 | 13355 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13356 | |
13357 | /* Handle the 'package Standard' special case. See description | |
13358 | of m_standard_p. */ | |
13359 | if (startswith (m_encoded_name.c_str (), "standard__")) | |
13360 | { | |
13361 | m_encoded_name = m_encoded_name.substr (sizeof ("standard__") - 1); | |
13362 | m_standard_p = true; | |
13363 | } | |
13364 | else | |
13365 | m_standard_p = false; | |
74ccd7f5 | 13366 | |
b5ec771e PA |
13367 | /* If the name contains a ".", then the user is entering a fully |
13368 | qualified entity name, and the match must not be done in wild | |
13369 | mode. Similarly, if the user wants to complete what looks | |
13370 | like an encoded name, the match must not be done in wild | |
13371 | mode. Also, in the standard__ special case always do | |
13372 | non-wild matching. */ | |
13373 | m_wild_match_p | |
13374 | = (lookup_name.match_type () != symbol_name_match_type::FULL | |
13375 | && !m_encoded_p | |
13376 | && !m_standard_p | |
13377 | && user_name.find ('.') == std::string::npos); | |
13378 | } | |
13379 | } | |
13380 | ||
13381 | /* symbol_name_matcher_ftype method for Ada. This only handles | |
13382 | completion mode. */ | |
13383 | ||
13384 | static bool | |
13385 | ada_symbol_name_matches (const char *symbol_search_name, | |
13386 | const lookup_name_info &lookup_name, | |
a207cff2 | 13387 | completion_match_result *comp_match_res) |
74ccd7f5 | 13388 | { |
b5ec771e PA |
13389 | return lookup_name.ada ().matches (symbol_search_name, |
13390 | lookup_name.match_type (), | |
a207cff2 | 13391 | comp_match_res); |
b5ec771e PA |
13392 | } |
13393 | ||
de63c46b PA |
13394 | /* A name matcher that matches the symbol name exactly, with |
13395 | strcmp. */ | |
13396 | ||
13397 | static bool | |
13398 | literal_symbol_name_matcher (const char *symbol_search_name, | |
13399 | const lookup_name_info &lookup_name, | |
13400 | completion_match_result *comp_match_res) | |
13401 | { | |
e0802d59 | 13402 | gdb::string_view name_view = lookup_name.name (); |
de63c46b | 13403 | |
e0802d59 TT |
13404 | if (lookup_name.completion_mode () |
13405 | ? (strncmp (symbol_search_name, name_view.data (), | |
13406 | name_view.size ()) == 0) | |
13407 | : symbol_search_name == name_view) | |
de63c46b PA |
13408 | { |
13409 | if (comp_match_res != NULL) | |
13410 | comp_match_res->set_match (symbol_search_name); | |
13411 | return true; | |
13412 | } | |
13413 | else | |
13414 | return false; | |
13415 | } | |
13416 | ||
c9debfb9 | 13417 | /* Implement the "get_symbol_name_matcher" language_defn method for |
b5ec771e PA |
13418 | Ada. */ |
13419 | ||
13420 | static symbol_name_matcher_ftype * | |
13421 | ada_get_symbol_name_matcher (const lookup_name_info &lookup_name) | |
13422 | { | |
de63c46b PA |
13423 | if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME) |
13424 | return literal_symbol_name_matcher; | |
13425 | ||
b5ec771e PA |
13426 | if (lookup_name.completion_mode ()) |
13427 | return ada_symbol_name_matches; | |
74ccd7f5 | 13428 | else |
b5ec771e PA |
13429 | { |
13430 | if (lookup_name.ada ().wild_match_p ()) | |
13431 | return do_wild_match; | |
a2cd4f14 JB |
13432 | else if (lookup_name.ada ().verbatim_p ()) |
13433 | return do_exact_match; | |
b5ec771e PA |
13434 | else |
13435 | return do_full_match; | |
13436 | } | |
74ccd7f5 JB |
13437 | } |
13438 | ||
0874fd07 AB |
13439 | /* Class representing the Ada language. */ |
13440 | ||
13441 | class ada_language : public language_defn | |
13442 | { | |
13443 | public: | |
13444 | ada_language () | |
0e25e767 | 13445 | : language_defn (language_ada) |
0874fd07 | 13446 | { /* Nothing. */ } |
5bd40f2a | 13447 | |
6f7664a9 AB |
13448 | /* See language.h. */ |
13449 | ||
13450 | const char *name () const override | |
13451 | { return "ada"; } | |
13452 | ||
13453 | /* See language.h. */ | |
13454 | ||
13455 | const char *natural_name () const override | |
13456 | { return "Ada"; } | |
13457 | ||
e171d6f1 AB |
13458 | /* See language.h. */ |
13459 | ||
13460 | const std::vector<const char *> &filename_extensions () const override | |
13461 | { | |
13462 | static const std::vector<const char *> extensions | |
13463 | = { ".adb", ".ads", ".a", ".ada", ".dg" }; | |
13464 | return extensions; | |
13465 | } | |
13466 | ||
5bd40f2a AB |
13467 | /* Print an array element index using the Ada syntax. */ |
13468 | ||
13469 | void print_array_index (struct type *index_type, | |
13470 | LONGEST index, | |
13471 | struct ui_file *stream, | |
13472 | const value_print_options *options) const override | |
13473 | { | |
13474 | struct value *index_value = val_atr (index_type, index); | |
13475 | ||
00c696a6 | 13476 | value_print (index_value, stream, options); |
6cb06a8c | 13477 | gdb_printf (stream, " => "); |
5bd40f2a | 13478 | } |
15e5fd35 AB |
13479 | |
13480 | /* Implement the "read_var_value" language_defn method for Ada. */ | |
13481 | ||
13482 | struct value *read_var_value (struct symbol *var, | |
13483 | const struct block *var_block, | |
bd2b40ac | 13484 | frame_info_ptr frame) const override |
15e5fd35 AB |
13485 | { |
13486 | /* The only case where default_read_var_value is not sufficient | |
13487 | is when VAR is a renaming... */ | |
13488 | if (frame != nullptr) | |
13489 | { | |
13490 | const struct block *frame_block = get_frame_block (frame, NULL); | |
13491 | if (frame_block != nullptr && ada_is_renaming_symbol (var)) | |
13492 | return ada_read_renaming_var_value (var, frame_block); | |
13493 | } | |
13494 | ||
13495 | /* This is a typical case where we expect the default_read_var_value | |
13496 | function to work. */ | |
13497 | return language_defn::read_var_value (var, var_block, frame); | |
13498 | } | |
1fb314aa | 13499 | |
2c71f639 | 13500 | /* See language.h. */ |
496feb16 | 13501 | bool symbol_printing_suppressed (struct symbol *symbol) const override |
2c71f639 | 13502 | { |
496feb16 | 13503 | return symbol->is_artificial (); |
2c71f639 TV |
13504 | } |
13505 | ||
1fb314aa AB |
13506 | /* See language.h. */ |
13507 | void language_arch_info (struct gdbarch *gdbarch, | |
13508 | struct language_arch_info *lai) const override | |
13509 | { | |
13510 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
13511 | ||
7bea47f0 AB |
13512 | /* Helper function to allow shorter lines below. */ |
13513 | auto add = [&] (struct type *t) | |
13514 | { | |
13515 | lai->add_primitive_type (t); | |
13516 | }; | |
13517 | ||
13518 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13519 | 0, "integer")); | |
13520 | add (arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
13521 | 0, "long_integer")); | |
13522 | add (arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), | |
13523 | 0, "short_integer")); | |
13524 | struct type *char_type = arch_character_type (gdbarch, TARGET_CHAR_BIT, | |
c9f66f00 | 13525 | 1, "character"); |
7bea47f0 AB |
13526 | lai->set_string_char_type (char_type); |
13527 | add (char_type); | |
c9f66f00 TT |
13528 | add (arch_character_type (gdbarch, 16, 1, "wide_character")); |
13529 | add (arch_character_type (gdbarch, 32, 1, "wide_wide_character")); | |
7bea47f0 AB |
13530 | add (arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), |
13531 | "float", gdbarch_float_format (gdbarch))); | |
13532 | add (arch_float_type (gdbarch, gdbarch_double_bit (gdbarch), | |
13533 | "long_float", gdbarch_double_format (gdbarch))); | |
13534 | add (arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch), | |
13535 | 0, "long_long_integer")); | |
13536 | add (arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch), | |
13537 | "long_long_float", | |
13538 | gdbarch_long_double_format (gdbarch))); | |
13539 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13540 | 0, "natural")); | |
13541 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13542 | 0, "positive")); | |
13543 | add (builtin->builtin_void); | |
13544 | ||
13545 | struct type *system_addr_ptr | |
1fb314aa AB |
13546 | = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, |
13547 | "void")); | |
7bea47f0 AB |
13548 | system_addr_ptr->set_name ("system__address"); |
13549 | add (system_addr_ptr); | |
1fb314aa AB |
13550 | |
13551 | /* Create the equivalent of the System.Storage_Elements.Storage_Offset | |
13552 | type. This is a signed integral type whose size is the same as | |
13553 | the size of addresses. */ | |
df86565b | 13554 | unsigned int addr_length = system_addr_ptr->length (); |
7bea47f0 AB |
13555 | add (arch_integer_type (gdbarch, addr_length * HOST_CHAR_BIT, 0, |
13556 | "storage_offset")); | |
1fb314aa | 13557 | |
7bea47f0 | 13558 | lai->set_bool_type (builtin->builtin_bool); |
1fb314aa | 13559 | } |
4009ee92 AB |
13560 | |
13561 | /* See language.h. */ | |
13562 | ||
13563 | bool iterate_over_symbols | |
13564 | (const struct block *block, const lookup_name_info &name, | |
13565 | domain_enum domain, | |
13566 | gdb::function_view<symbol_found_callback_ftype> callback) const override | |
13567 | { | |
d1183b06 TT |
13568 | std::vector<struct block_symbol> results |
13569 | = ada_lookup_symbol_list_worker (name, block, domain, 0); | |
4009ee92 AB |
13570 | for (block_symbol &sym : results) |
13571 | { | |
13572 | if (!callback (&sym)) | |
13573 | return false; | |
13574 | } | |
13575 | ||
13576 | return true; | |
13577 | } | |
6f827019 AB |
13578 | |
13579 | /* See language.h. */ | |
3456e70c TT |
13580 | bool sniff_from_mangled_name |
13581 | (const char *mangled, | |
13582 | gdb::unique_xmalloc_ptr<char> *out) const override | |
6f827019 AB |
13583 | { |
13584 | std::string demangled = ada_decode (mangled); | |
13585 | ||
13586 | *out = NULL; | |
13587 | ||
13588 | if (demangled != mangled && demangled[0] != '<') | |
13589 | { | |
13590 | /* Set the gsymbol language to Ada, but still return 0. | |
13591 | Two reasons for that: | |
13592 | ||
13593 | 1. For Ada, we prefer computing the symbol's decoded name | |
13594 | on the fly rather than pre-compute it, in order to save | |
13595 | memory (Ada projects are typically very large). | |
13596 | ||
13597 | 2. There are some areas in the definition of the GNAT | |
13598 | encoding where, with a bit of bad luck, we might be able | |
13599 | to decode a non-Ada symbol, generating an incorrect | |
13600 | demangled name (Eg: names ending with "TB" for instance | |
13601 | are identified as task bodies and so stripped from | |
13602 | the decoded name returned). | |
13603 | ||
13604 | Returning true, here, but not setting *DEMANGLED, helps us get | |
13605 | a little bit of the best of both worlds. Because we're last, | |
13606 | we should not affect any of the other languages that were | |
13607 | able to demangle the symbol before us; we get to correctly | |
13608 | tag Ada symbols as such; and even if we incorrectly tagged a | |
13609 | non-Ada symbol, which should be rare, any routing through the | |
13610 | Ada language should be transparent (Ada tries to behave much | |
13611 | like C/C++ with non-Ada symbols). */ | |
13612 | return true; | |
13613 | } | |
13614 | ||
13615 | return false; | |
13616 | } | |
fbfb0a46 AB |
13617 | |
13618 | /* See language.h. */ | |
13619 | ||
3456e70c TT |
13620 | gdb::unique_xmalloc_ptr<char> demangle_symbol (const char *mangled, |
13621 | int options) const override | |
0a50df5d | 13622 | { |
3456e70c | 13623 | return make_unique_xstrdup (ada_decode (mangled).c_str ()); |
0a50df5d AB |
13624 | } |
13625 | ||
13626 | /* See language.h. */ | |
13627 | ||
fbfb0a46 AB |
13628 | void print_type (struct type *type, const char *varstring, |
13629 | struct ui_file *stream, int show, int level, | |
13630 | const struct type_print_options *flags) const override | |
13631 | { | |
13632 | ada_print_type (type, varstring, stream, show, level, flags); | |
13633 | } | |
c9debfb9 | 13634 | |
53fc67f8 AB |
13635 | /* See language.h. */ |
13636 | ||
13637 | const char *word_break_characters (void) const override | |
13638 | { | |
13639 | return ada_completer_word_break_characters; | |
13640 | } | |
13641 | ||
7e56227d AB |
13642 | /* See language.h. */ |
13643 | ||
13644 | void collect_symbol_completion_matches (completion_tracker &tracker, | |
13645 | complete_symbol_mode mode, | |
13646 | symbol_name_match_type name_match_type, | |
13647 | const char *text, const char *word, | |
13648 | enum type_code code) const override | |
13649 | { | |
13650 | struct symbol *sym; | |
13651 | const struct block *b, *surrounding_static_block = 0; | |
13652 | struct block_iterator iter; | |
13653 | ||
13654 | gdb_assert (code == TYPE_CODE_UNDEF); | |
13655 | ||
13656 | lookup_name_info lookup_name (text, name_match_type, true); | |
13657 | ||
13658 | /* First, look at the partial symtab symbols. */ | |
13659 | expand_symtabs_matching (NULL, | |
13660 | lookup_name, | |
13661 | NULL, | |
13662 | NULL, | |
03a8ea51 | 13663 | SEARCH_GLOBAL_BLOCK | SEARCH_STATIC_BLOCK, |
7e56227d AB |
13664 | ALL_DOMAIN); |
13665 | ||
13666 | /* At this point scan through the misc symbol vectors and add each | |
13667 | symbol you find to the list. Eventually we want to ignore | |
13668 | anything that isn't a text symbol (everything else will be | |
13669 | handled by the psymtab code above). */ | |
13670 | ||
13671 | for (objfile *objfile : current_program_space->objfiles ()) | |
13672 | { | |
13673 | for (minimal_symbol *msymbol : objfile->msymbols ()) | |
13674 | { | |
13675 | QUIT; | |
13676 | ||
13677 | if (completion_skip_symbol (mode, msymbol)) | |
13678 | continue; | |
13679 | ||
13680 | language symbol_language = msymbol->language (); | |
13681 | ||
13682 | /* Ada minimal symbols won't have their language set to Ada. If | |
13683 | we let completion_list_add_name compare using the | |
13684 | default/C-like matcher, then when completing e.g., symbols in a | |
13685 | package named "pck", we'd match internal Ada symbols like | |
13686 | "pckS", which are invalid in an Ada expression, unless you wrap | |
13687 | them in '<' '>' to request a verbatim match. | |
13688 | ||
13689 | Unfortunately, some Ada encoded names successfully demangle as | |
13690 | C++ symbols (using an old mangling scheme), such as "name__2Xn" | |
13691 | -> "Xn::name(void)" and thus some Ada minimal symbols end up | |
13692 | with the wrong language set. Paper over that issue here. */ | |
13693 | if (symbol_language == language_auto | |
13694 | || symbol_language == language_cplus) | |
13695 | symbol_language = language_ada; | |
13696 | ||
13697 | completion_list_add_name (tracker, | |
13698 | symbol_language, | |
13699 | msymbol->linkage_name (), | |
13700 | lookup_name, text, word); | |
13701 | } | |
13702 | } | |
13703 | ||
13704 | /* Search upwards from currently selected frame (so that we can | |
13705 | complete on local vars. */ | |
13706 | ||
f135fe72 | 13707 | for (b = get_selected_block (0); b != NULL; b = b->superblock ()) |
7e56227d | 13708 | { |
f135fe72 | 13709 | if (!b->superblock ()) |
7e56227d AB |
13710 | surrounding_static_block = b; /* For elmin of dups */ |
13711 | ||
13712 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
13713 | { | |
13714 | if (completion_skip_symbol (mode, sym)) | |
13715 | continue; | |
13716 | ||
13717 | completion_list_add_name (tracker, | |
13718 | sym->language (), | |
13719 | sym->linkage_name (), | |
13720 | lookup_name, text, word); | |
13721 | } | |
13722 | } | |
13723 | ||
13724 | /* Go through the symtabs and check the externs and statics for | |
13725 | symbols which match. */ | |
13726 | ||
13727 | for (objfile *objfile : current_program_space->objfiles ()) | |
13728 | { | |
13729 | for (compunit_symtab *s : objfile->compunits ()) | |
13730 | { | |
13731 | QUIT; | |
63d609de | 13732 | b = s->blockvector ()->global_block (); |
7e56227d AB |
13733 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
13734 | { | |
13735 | if (completion_skip_symbol (mode, sym)) | |
13736 | continue; | |
13737 | ||
13738 | completion_list_add_name (tracker, | |
13739 | sym->language (), | |
13740 | sym->linkage_name (), | |
13741 | lookup_name, text, word); | |
13742 | } | |
13743 | } | |
13744 | } | |
13745 | ||
13746 | for (objfile *objfile : current_program_space->objfiles ()) | |
13747 | { | |
13748 | for (compunit_symtab *s : objfile->compunits ()) | |
13749 | { | |
13750 | QUIT; | |
63d609de | 13751 | b = s->blockvector ()->static_block (); |
7e56227d AB |
13752 | /* Don't do this block twice. */ |
13753 | if (b == surrounding_static_block) | |
13754 | continue; | |
13755 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
13756 | { | |
13757 | if (completion_skip_symbol (mode, sym)) | |
13758 | continue; | |
13759 | ||
13760 | completion_list_add_name (tracker, | |
13761 | sym->language (), | |
13762 | sym->linkage_name (), | |
13763 | lookup_name, text, word); | |
13764 | } | |
13765 | } | |
13766 | } | |
13767 | } | |
13768 | ||
f16a9f57 AB |
13769 | /* See language.h. */ |
13770 | ||
13771 | gdb::unique_xmalloc_ptr<char> watch_location_expression | |
13772 | (struct type *type, CORE_ADDR addr) const override | |
13773 | { | |
27710edb | 13774 | type = check_typedef (check_typedef (type)->target_type ()); |
f16a9f57 | 13775 | std::string name = type_to_string (type); |
8579fd13 | 13776 | return xstrprintf ("{%s} %s", name.c_str (), core_addr_to_string (addr)); |
f16a9f57 AB |
13777 | } |
13778 | ||
a1d1fa3e AB |
13779 | /* See language.h. */ |
13780 | ||
13781 | void value_print (struct value *val, struct ui_file *stream, | |
13782 | const struct value_print_options *options) const override | |
13783 | { | |
13784 | return ada_value_print (val, stream, options); | |
13785 | } | |
13786 | ||
ebe2334e AB |
13787 | /* See language.h. */ |
13788 | ||
13789 | void value_print_inner | |
13790 | (struct value *val, struct ui_file *stream, int recurse, | |
13791 | const struct value_print_options *options) const override | |
13792 | { | |
13793 | return ada_value_print_inner (val, stream, recurse, options); | |
13794 | } | |
13795 | ||
a78a19b1 AB |
13796 | /* See language.h. */ |
13797 | ||
13798 | struct block_symbol lookup_symbol_nonlocal | |
13799 | (const char *name, const struct block *block, | |
13800 | const domain_enum domain) const override | |
13801 | { | |
13802 | struct block_symbol sym; | |
13803 | ||
13804 | sym = ada_lookup_symbol (name, block_static_block (block), domain); | |
13805 | if (sym.symbol != NULL) | |
13806 | return sym; | |
13807 | ||
13808 | /* If we haven't found a match at this point, try the primitive | |
13809 | types. In other languages, this search is performed before | |
13810 | searching for global symbols in order to short-circuit that | |
13811 | global-symbol search if it happens that the name corresponds | |
13812 | to a primitive type. But we cannot do the same in Ada, because | |
13813 | it is perfectly legitimate for a program to declare a type which | |
13814 | has the same name as a standard type. If looking up a type in | |
13815 | that situation, we have traditionally ignored the primitive type | |
13816 | in favor of user-defined types. This is why, unlike most other | |
13817 | languages, we search the primitive types this late and only after | |
13818 | having searched the global symbols without success. */ | |
13819 | ||
13820 | if (domain == VAR_DOMAIN) | |
13821 | { | |
13822 | struct gdbarch *gdbarch; | |
13823 | ||
13824 | if (block == NULL) | |
13825 | gdbarch = target_gdbarch (); | |
13826 | else | |
13827 | gdbarch = block_gdbarch (block); | |
13828 | sym.symbol | |
13829 | = language_lookup_primitive_type_as_symbol (this, gdbarch, name); | |
13830 | if (sym.symbol != NULL) | |
13831 | return sym; | |
13832 | } | |
13833 | ||
13834 | return {}; | |
13835 | } | |
13836 | ||
87afa652 AB |
13837 | /* See language.h. */ |
13838 | ||
13839 | int parser (struct parser_state *ps) const override | |
13840 | { | |
13841 | warnings_issued = 0; | |
13842 | return ada_parse (ps); | |
13843 | } | |
13844 | ||
ec8cec5b AB |
13845 | /* See language.h. */ |
13846 | ||
13847 | void emitchar (int ch, struct type *chtype, | |
13848 | struct ui_file *stream, int quoter) const override | |
13849 | { | |
13850 | ada_emit_char (ch, chtype, stream, quoter, 1); | |
13851 | } | |
13852 | ||
52b50f2c AB |
13853 | /* See language.h. */ |
13854 | ||
13855 | void printchar (int ch, struct type *chtype, | |
13856 | struct ui_file *stream) const override | |
13857 | { | |
13858 | ada_printchar (ch, chtype, stream); | |
13859 | } | |
13860 | ||
d711ee67 AB |
13861 | /* See language.h. */ |
13862 | ||
13863 | void printstr (struct ui_file *stream, struct type *elttype, | |
13864 | const gdb_byte *string, unsigned int length, | |
13865 | const char *encoding, int force_ellipses, | |
13866 | const struct value_print_options *options) const override | |
13867 | { | |
13868 | ada_printstr (stream, elttype, string, length, encoding, | |
13869 | force_ellipses, options); | |
13870 | } | |
13871 | ||
4ffc13fb AB |
13872 | /* See language.h. */ |
13873 | ||
13874 | void print_typedef (struct type *type, struct symbol *new_symbol, | |
13875 | struct ui_file *stream) const override | |
13876 | { | |
13877 | ada_print_typedef (type, new_symbol, stream); | |
13878 | } | |
13879 | ||
39e7ecca AB |
13880 | /* See language.h. */ |
13881 | ||
13882 | bool is_string_type_p (struct type *type) const override | |
13883 | { | |
13884 | return ada_is_string_type (type); | |
13885 | } | |
13886 | ||
22e3f3ed AB |
13887 | /* See language.h. */ |
13888 | ||
13889 | const char *struct_too_deep_ellipsis () const override | |
13890 | { return "(...)"; } | |
39e7ecca | 13891 | |
67bd3fd5 AB |
13892 | /* See language.h. */ |
13893 | ||
13894 | bool c_style_arrays_p () const override | |
13895 | { return false; } | |
13896 | ||
d3355e4d AB |
13897 | /* See language.h. */ |
13898 | ||
13899 | bool store_sym_names_in_linkage_form_p () const override | |
13900 | { return true; } | |
13901 | ||
b63a3f3f AB |
13902 | /* See language.h. */ |
13903 | ||
13904 | const struct lang_varobj_ops *varobj_ops () const override | |
13905 | { return &ada_varobj_ops; } | |
13906 | ||
c9debfb9 AB |
13907 | protected: |
13908 | /* See language.h. */ | |
13909 | ||
13910 | symbol_name_matcher_ftype *get_symbol_name_matcher_inner | |
13911 | (const lookup_name_info &lookup_name) const override | |
13912 | { | |
13913 | return ada_get_symbol_name_matcher (lookup_name); | |
13914 | } | |
0874fd07 AB |
13915 | }; |
13916 | ||
13917 | /* Single instance of the Ada language class. */ | |
13918 | ||
13919 | static ada_language ada_language_defn; | |
13920 | ||
5bf03f13 JB |
13921 | /* Command-list for the "set/show ada" prefix command. */ |
13922 | static struct cmd_list_element *set_ada_list; | |
13923 | static struct cmd_list_element *show_ada_list; | |
13924 | ||
3d9434b5 JB |
13925 | /* This module's 'new_objfile' observer. */ |
13926 | ||
13927 | static void | |
13928 | ada_new_objfile_observer (struct objfile *objfile) | |
13929 | { | |
13930 | ada_clear_symbol_cache (); | |
13931 | } | |
13932 | ||
13933 | /* This module's 'free_objfile' observer. */ | |
13934 | ||
13935 | static void | |
13936 | ada_free_objfile_observer (struct objfile *objfile) | |
13937 | { | |
13938 | ada_clear_symbol_cache (); | |
13939 | } | |
13940 | ||
315e4ebb TT |
13941 | /* Charsets known to GNAT. */ |
13942 | static const char * const gnat_source_charsets[] = | |
13943 | { | |
13944 | /* Note that code below assumes that the default comes first. | |
13945 | Latin-1 is the default here, because that is also GNAT's | |
13946 | default. */ | |
13947 | "ISO-8859-1", | |
13948 | "ISO-8859-2", | |
13949 | "ISO-8859-3", | |
13950 | "ISO-8859-4", | |
13951 | "ISO-8859-5", | |
13952 | "ISO-8859-15", | |
13953 | "CP437", | |
13954 | "CP850", | |
13955 | /* Note that this value is special-cased in the encoder and | |
13956 | decoder. */ | |
13957 | ada_utf8, | |
13958 | nullptr | |
13959 | }; | |
13960 | ||
6c265988 | 13961 | void _initialize_ada_language (); |
d2e4a39e | 13962 | void |
6c265988 | 13963 | _initialize_ada_language () |
14f9c5c9 | 13964 | { |
f54bdb6d SM |
13965 | add_setshow_prefix_cmd |
13966 | ("ada", no_class, | |
13967 | _("Prefix command for changing Ada-specific settings."), | |
13968 | _("Generic command for showing Ada-specific settings."), | |
13969 | &set_ada_list, &show_ada_list, | |
13970 | &setlist, &showlist); | |
5bf03f13 JB |
13971 | |
13972 | add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure, | |
dda83cd7 | 13973 | &trust_pad_over_xvs, _("\ |
590042fc PW |
13974 | Enable or disable an optimization trusting PAD types over XVS types."), _("\ |
13975 | Show whether an optimization trusting PAD types over XVS types is activated."), | |
dda83cd7 | 13976 | _("\ |
5bf03f13 JB |
13977 | This is related to the encoding used by the GNAT compiler. The debugger\n\ |
13978 | should normally trust the contents of PAD types, but certain older versions\n\ | |
13979 | of GNAT have a bug that sometimes causes the information in the PAD type\n\ | |
13980 | to be incorrect. Turning this setting \"off\" allows the debugger to\n\ | |
13981 | work around this bug. It is always safe to turn this option \"off\", but\n\ | |
13982 | this incurs a slight performance penalty, so it is recommended to NOT change\n\ | |
13983 | this option to \"off\" unless necessary."), | |
dda83cd7 | 13984 | NULL, NULL, &set_ada_list, &show_ada_list); |
5bf03f13 | 13985 | |
d72413e6 PMR |
13986 | add_setshow_boolean_cmd ("print-signatures", class_vars, |
13987 | &print_signatures, _("\ | |
13988 | Enable or disable the output of formal and return types for functions in the \ | |
590042fc | 13989 | overloads selection menu."), _("\ |
d72413e6 | 13990 | Show whether the output of formal and return types for functions in the \ |
590042fc | 13991 | overloads selection menu is activated."), |
d72413e6 PMR |
13992 | NULL, NULL, NULL, &set_ada_list, &show_ada_list); |
13993 | ||
315e4ebb TT |
13994 | ada_source_charset = gnat_source_charsets[0]; |
13995 | add_setshow_enum_cmd ("source-charset", class_files, | |
13996 | gnat_source_charsets, | |
13997 | &ada_source_charset, _("\ | |
13998 | Set the Ada source character set."), _("\ | |
13999 | Show the Ada source character set."), _("\ | |
14000 | The character set used for Ada source files.\n\ | |
14001 | This must correspond to the '-gnati' or '-gnatW' option passed to GNAT."), | |
14002 | nullptr, nullptr, | |
14003 | &set_ada_list, &show_ada_list); | |
14004 | ||
9ac4176b PA |
14005 | add_catch_command ("exception", _("\ |
14006 | Catch Ada exceptions, when raised.\n\ | |
9bf7038b | 14007 | Usage: catch exception [ARG] [if CONDITION]\n\ |
60a90376 JB |
14008 | Without any argument, stop when any Ada exception is raised.\n\ |
14009 | If ARG is \"unhandled\" (without the quotes), only stop when the exception\n\ | |
14010 | being raised does not have a handler (and will therefore lead to the task's\n\ | |
14011 | termination).\n\ | |
14012 | Otherwise, the catchpoint only stops when the name of the exception being\n\ | |
9bf7038b TT |
14013 | raised is the same as ARG.\n\ |
14014 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14015 | exception should cause a stop."), | |
9ac4176b | 14016 | catch_ada_exception_command, |
71bed2db | 14017 | catch_ada_completer, |
9ac4176b PA |
14018 | CATCH_PERMANENT, |
14019 | CATCH_TEMPORARY); | |
9f757bf7 XR |
14020 | |
14021 | add_catch_command ("handlers", _("\ | |
14022 | Catch Ada exceptions, when handled.\n\ | |
9bf7038b TT |
14023 | Usage: catch handlers [ARG] [if CONDITION]\n\ |
14024 | Without any argument, stop when any Ada exception is handled.\n\ | |
14025 | With an argument, catch only exceptions with the given name.\n\ | |
14026 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14027 | exception should cause a stop."), | |
9f757bf7 | 14028 | catch_ada_handlers_command, |
dda83cd7 | 14029 | catch_ada_completer, |
9f757bf7 XR |
14030 | CATCH_PERMANENT, |
14031 | CATCH_TEMPORARY); | |
9ac4176b PA |
14032 | add_catch_command ("assert", _("\ |
14033 | Catch failed Ada assertions, when raised.\n\ | |
9bf7038b TT |
14034 | Usage: catch assert [if CONDITION]\n\ |
14035 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14036 | exception should cause a stop."), | |
9ac4176b | 14037 | catch_assert_command, |
dda83cd7 | 14038 | NULL, |
9ac4176b PA |
14039 | CATCH_PERMANENT, |
14040 | CATCH_TEMPORARY); | |
14041 | ||
778865d3 JB |
14042 | add_info ("exceptions", info_exceptions_command, |
14043 | _("\ | |
14044 | List all Ada exception names.\n\ | |
9bf7038b | 14045 | Usage: info exceptions [REGEXP]\n\ |
778865d3 JB |
14046 | If a regular expression is passed as an argument, only those matching\n\ |
14047 | the regular expression are listed.")); | |
14048 | ||
f54bdb6d SM |
14049 | add_setshow_prefix_cmd ("ada", class_maintenance, |
14050 | _("Set Ada maintenance-related variables."), | |
14051 | _("Show Ada maintenance-related variables."), | |
14052 | &maint_set_ada_cmdlist, &maint_show_ada_cmdlist, | |
14053 | &maintenance_set_cmdlist, &maintenance_show_cmdlist); | |
c6044dd1 JB |
14054 | |
14055 | add_setshow_boolean_cmd | |
14056 | ("ignore-descriptive-types", class_maintenance, | |
14057 | &ada_ignore_descriptive_types_p, | |
14058 | _("Set whether descriptive types generated by GNAT should be ignored."), | |
14059 | _("Show whether descriptive types generated by GNAT should be ignored."), | |
14060 | _("\ | |
14061 | When enabled, the debugger will stop using the DW_AT_GNAT_descriptive_type\n\ | |
14062 | DWARF attribute."), | |
14063 | NULL, NULL, &maint_set_ada_cmdlist, &maint_show_ada_cmdlist); | |
14064 | ||
2698f5ea TT |
14065 | decoded_names_store = htab_create_alloc (256, htab_hash_string, |
14066 | htab_eq_string, | |
459a2e4c | 14067 | NULL, xcalloc, xfree); |
6b69afc4 | 14068 | |
3d9434b5 | 14069 | /* The ada-lang observers. */ |
c90e7d63 SM |
14070 | gdb::observers::new_objfile.attach (ada_new_objfile_observer, "ada-lang"); |
14071 | gdb::observers::free_objfile.attach (ada_free_objfile_observer, "ada-lang"); | |
14072 | gdb::observers::inferior_exit.attach (ada_inferior_exit, "ada-lang"); | |
14f9c5c9 | 14073 | } |