| 1 | /* Multiple source language support for GDB. |
| 2 | |
| 3 | Copyright (C) 1991-2021 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by the Department of Computer Science at the State University |
| 6 | of New York at Buffalo. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | /* This file contains functions that return things that are specific |
| 24 | to languages. Each function should examine current_language if necessary, |
| 25 | and return the appropriate result. */ |
| 26 | |
| 27 | /* FIXME: Most of these would be better organized as macros which |
| 28 | return data out of a "language-specific" struct pointer that is set |
| 29 | whenever the working language changes. That would be a lot faster. */ |
| 30 | |
| 31 | #include "defs.h" |
| 32 | #include <ctype.h> |
| 33 | #include "symtab.h" |
| 34 | #include "gdbtypes.h" |
| 35 | #include "value.h" |
| 36 | #include "gdbcmd.h" |
| 37 | #include "expression.h" |
| 38 | #include "language.h" |
| 39 | #include "varobj.h" |
| 40 | #include "target.h" |
| 41 | #include "parser-defs.h" |
| 42 | #include "demangle.h" |
| 43 | #include "symfile.h" |
| 44 | #include "cp-support.h" |
| 45 | #include "frame.h" |
| 46 | #include "c-lang.h" |
| 47 | #include <algorithm> |
| 48 | #include "gdbarch.h" |
| 49 | #include "compile/compile-internal.h" |
| 50 | |
| 51 | static void set_range_case (void); |
| 52 | |
| 53 | /* range_mode == |
| 54 | range_mode_auto: range_check set automatically to default of language. |
| 55 | range_mode_manual: range_check set manually by user. */ |
| 56 | |
| 57 | enum range_mode |
| 58 | { |
| 59 | range_mode_auto, range_mode_manual |
| 60 | }; |
| 61 | |
| 62 | /* case_mode == |
| 63 | case_mode_auto: case_sensitivity set upon selection of scope. |
| 64 | case_mode_manual: case_sensitivity set only by user. */ |
| 65 | |
| 66 | enum case_mode |
| 67 | { |
| 68 | case_mode_auto, case_mode_manual |
| 69 | }; |
| 70 | |
| 71 | /* The current (default at startup) state of type and range checking. |
| 72 | (If the modes are set to "auto", though, these are changed based |
| 73 | on the default language at startup, and then again based on the |
| 74 | language of the first source file. */ |
| 75 | |
| 76 | static enum range_mode range_mode = range_mode_auto; |
| 77 | enum range_check range_check = range_check_off; |
| 78 | static enum case_mode case_mode = case_mode_auto; |
| 79 | enum case_sensitivity case_sensitivity = case_sensitive_on; |
| 80 | |
| 81 | /* The current language and language_mode (see language.h). */ |
| 82 | |
| 83 | const struct language_defn *current_language = nullptr; |
| 84 | enum language_mode language_mode = language_mode_auto; |
| 85 | |
| 86 | /* The language that the user expects to be typing in (the language |
| 87 | of main(), or the last language we notified them about, or C). */ |
| 88 | |
| 89 | const struct language_defn *expected_language; |
| 90 | |
| 91 | /* Define the array containing all languages. */ |
| 92 | |
| 93 | const struct language_defn *language_defn::languages[nr_languages]; |
| 94 | |
| 95 | /* The current values of the "set language/range/case-sensitive" enum |
| 96 | commands. */ |
| 97 | static const char *language; |
| 98 | static const char *range; |
| 99 | static const char *case_sensitive; |
| 100 | |
| 101 | /* See language.h. */ |
| 102 | const char lang_frame_mismatch_warn[] = |
| 103 | N_("Warning: the current language does not match this frame."); |
| 104 | \f |
| 105 | /* This page contains the functions corresponding to GDB commands |
| 106 | and their helpers. */ |
| 107 | |
| 108 | /* Show command. Display a warning if the language set |
| 109 | does not match the frame. */ |
| 110 | static void |
| 111 | show_language_command (struct ui_file *file, int from_tty, |
| 112 | struct cmd_list_element *c, const char *value) |
| 113 | { |
| 114 | enum language flang; /* The language of the frame. */ |
| 115 | |
| 116 | if (language_mode == language_mode_auto) |
| 117 | fprintf_filtered (gdb_stdout, |
| 118 | _("The current source language is " |
| 119 | "\"auto; currently %s\".\n"), |
| 120 | current_language->name ()); |
| 121 | else |
| 122 | fprintf_filtered (gdb_stdout, |
| 123 | _("The current source language is \"%s\".\n"), |
| 124 | current_language->name ()); |
| 125 | |
| 126 | if (has_stack_frames ()) |
| 127 | { |
| 128 | struct frame_info *frame; |
| 129 | |
| 130 | frame = get_selected_frame (NULL); |
| 131 | flang = get_frame_language (frame); |
| 132 | if (flang != language_unknown |
| 133 | && language_mode == language_mode_manual |
| 134 | && current_language->la_language != flang) |
| 135 | printf_filtered ("%s\n", _(lang_frame_mismatch_warn)); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /* Set command. Change the current working language. */ |
| 140 | static void |
| 141 | set_language_command (const char *ignore, |
| 142 | int from_tty, struct cmd_list_element *c) |
| 143 | { |
| 144 | enum language flang = language_unknown; |
| 145 | |
| 146 | /* "local" is a synonym of "auto". */ |
| 147 | if (strcmp (language, "local") == 0) |
| 148 | language = "auto"; |
| 149 | |
| 150 | /* Search the list of languages for a match. */ |
| 151 | for (const auto &lang : language_defn::languages) |
| 152 | { |
| 153 | if (strcmp (lang->name (), language) == 0) |
| 154 | { |
| 155 | /* Found it! Go into manual mode, and use this language. */ |
| 156 | if (lang->la_language == language_auto) |
| 157 | { |
| 158 | /* Enter auto mode. Set to the current frame's language, if |
| 159 | known, or fallback to the initial language. */ |
| 160 | language_mode = language_mode_auto; |
| 161 | try |
| 162 | { |
| 163 | struct frame_info *frame; |
| 164 | |
| 165 | frame = get_selected_frame (NULL); |
| 166 | flang = get_frame_language (frame); |
| 167 | } |
| 168 | catch (const gdb_exception_error &ex) |
| 169 | { |
| 170 | flang = language_unknown; |
| 171 | } |
| 172 | |
| 173 | if (flang != language_unknown) |
| 174 | set_language (flang); |
| 175 | else |
| 176 | set_initial_language (); |
| 177 | expected_language = current_language; |
| 178 | return; |
| 179 | } |
| 180 | else |
| 181 | { |
| 182 | /* Enter manual mode. Set the specified language. */ |
| 183 | language_mode = language_mode_manual; |
| 184 | current_language = lang; |
| 185 | set_range_case (); |
| 186 | expected_language = current_language; |
| 187 | return; |
| 188 | } |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | internal_error (__FILE__, __LINE__, |
| 193 | "Couldn't find language `%s' in known languages list.", |
| 194 | language); |
| 195 | } |
| 196 | |
| 197 | /* Show command. Display a warning if the range setting does |
| 198 | not match the current language. */ |
| 199 | static void |
| 200 | show_range_command (struct ui_file *file, int from_tty, |
| 201 | struct cmd_list_element *c, const char *value) |
| 202 | { |
| 203 | if (range_mode == range_mode_auto) |
| 204 | { |
| 205 | const char *tmp; |
| 206 | |
| 207 | switch (range_check) |
| 208 | { |
| 209 | case range_check_on: |
| 210 | tmp = "on"; |
| 211 | break; |
| 212 | case range_check_off: |
| 213 | tmp = "off"; |
| 214 | break; |
| 215 | case range_check_warn: |
| 216 | tmp = "warn"; |
| 217 | break; |
| 218 | default: |
| 219 | internal_error (__FILE__, __LINE__, |
| 220 | "Unrecognized range check setting."); |
| 221 | } |
| 222 | |
| 223 | fprintf_filtered (gdb_stdout, |
| 224 | _("Range checking is \"auto; currently %s\".\n"), |
| 225 | tmp); |
| 226 | } |
| 227 | else |
| 228 | fprintf_filtered (gdb_stdout, _("Range checking is \"%s\".\n"), |
| 229 | value); |
| 230 | |
| 231 | if (range_check == range_check_warn |
| 232 | || ((range_check == range_check_on) |
| 233 | != current_language->range_checking_on_by_default ())) |
| 234 | warning (_("the current range check setting " |
| 235 | "does not match the language.\n")); |
| 236 | } |
| 237 | |
| 238 | /* Set command. Change the setting for range checking. */ |
| 239 | static void |
| 240 | set_range_command (const char *ignore, |
| 241 | int from_tty, struct cmd_list_element *c) |
| 242 | { |
| 243 | if (strcmp (range, "on") == 0) |
| 244 | { |
| 245 | range_check = range_check_on; |
| 246 | range_mode = range_mode_manual; |
| 247 | } |
| 248 | else if (strcmp (range, "warn") == 0) |
| 249 | { |
| 250 | range_check = range_check_warn; |
| 251 | range_mode = range_mode_manual; |
| 252 | } |
| 253 | else if (strcmp (range, "off") == 0) |
| 254 | { |
| 255 | range_check = range_check_off; |
| 256 | range_mode = range_mode_manual; |
| 257 | } |
| 258 | else if (strcmp (range, "auto") == 0) |
| 259 | { |
| 260 | range_mode = range_mode_auto; |
| 261 | set_range_case (); |
| 262 | return; |
| 263 | } |
| 264 | else |
| 265 | { |
| 266 | internal_error (__FILE__, __LINE__, |
| 267 | _("Unrecognized range check setting: \"%s\""), range); |
| 268 | } |
| 269 | if (range_check == range_check_warn |
| 270 | || ((range_check == range_check_on) |
| 271 | != current_language->range_checking_on_by_default ())) |
| 272 | warning (_("the current range check setting " |
| 273 | "does not match the language.\n")); |
| 274 | } |
| 275 | |
| 276 | /* Show command. Display a warning if the case sensitivity setting does |
| 277 | not match the current language. */ |
| 278 | static void |
| 279 | show_case_command (struct ui_file *file, int from_tty, |
| 280 | struct cmd_list_element *c, const char *value) |
| 281 | { |
| 282 | if (case_mode == case_mode_auto) |
| 283 | { |
| 284 | const char *tmp = NULL; |
| 285 | |
| 286 | switch (case_sensitivity) |
| 287 | { |
| 288 | case case_sensitive_on: |
| 289 | tmp = "on"; |
| 290 | break; |
| 291 | case case_sensitive_off: |
| 292 | tmp = "off"; |
| 293 | break; |
| 294 | default: |
| 295 | internal_error (__FILE__, __LINE__, |
| 296 | "Unrecognized case-sensitive setting."); |
| 297 | } |
| 298 | |
| 299 | fprintf_filtered (gdb_stdout, |
| 300 | _("Case sensitivity in " |
| 301 | "name search is \"auto; currently %s\".\n"), |
| 302 | tmp); |
| 303 | } |
| 304 | else |
| 305 | fprintf_filtered (gdb_stdout, |
| 306 | _("Case sensitivity in name search is \"%s\".\n"), |
| 307 | value); |
| 308 | |
| 309 | if (case_sensitivity != current_language->case_sensitivity ()) |
| 310 | warning (_("the current case sensitivity setting does not match " |
| 311 | "the language.\n")); |
| 312 | } |
| 313 | |
| 314 | /* Set command. Change the setting for case sensitivity. */ |
| 315 | |
| 316 | static void |
| 317 | set_case_command (const char *ignore, int from_tty, struct cmd_list_element *c) |
| 318 | { |
| 319 | if (strcmp (case_sensitive, "on") == 0) |
| 320 | { |
| 321 | case_sensitivity = case_sensitive_on; |
| 322 | case_mode = case_mode_manual; |
| 323 | } |
| 324 | else if (strcmp (case_sensitive, "off") == 0) |
| 325 | { |
| 326 | case_sensitivity = case_sensitive_off; |
| 327 | case_mode = case_mode_manual; |
| 328 | } |
| 329 | else if (strcmp (case_sensitive, "auto") == 0) |
| 330 | { |
| 331 | case_mode = case_mode_auto; |
| 332 | set_range_case (); |
| 333 | return; |
| 334 | } |
| 335 | else |
| 336 | { |
| 337 | internal_error (__FILE__, __LINE__, |
| 338 | "Unrecognized case-sensitive setting: \"%s\"", |
| 339 | case_sensitive); |
| 340 | } |
| 341 | |
| 342 | if (case_sensitivity != current_language->case_sensitivity ()) |
| 343 | warning (_("the current case sensitivity setting does not match " |
| 344 | "the language.\n")); |
| 345 | } |
| 346 | |
| 347 | /* Set the status of range and type checking and case sensitivity based on |
| 348 | the current modes and the current language. |
| 349 | If SHOW is non-zero, then print out the current language, |
| 350 | type and range checking status. */ |
| 351 | static void |
| 352 | set_range_case (void) |
| 353 | { |
| 354 | if (range_mode == range_mode_auto) |
| 355 | range_check = (current_language->range_checking_on_by_default () |
| 356 | ? range_check_on : range_check_off); |
| 357 | |
| 358 | if (case_mode == case_mode_auto) |
| 359 | case_sensitivity = current_language->case_sensitivity (); |
| 360 | } |
| 361 | |
| 362 | /* Set current language to (enum language) LANG. Returns previous |
| 363 | language. */ |
| 364 | |
| 365 | enum language |
| 366 | set_language (enum language lang) |
| 367 | { |
| 368 | enum language prev_language; |
| 369 | |
| 370 | prev_language = current_language->la_language; |
| 371 | current_language = language_def (lang); |
| 372 | set_range_case (); |
| 373 | return prev_language; |
| 374 | } |
| 375 | \f |
| 376 | |
| 377 | /* See language.h. */ |
| 378 | |
| 379 | void |
| 380 | language_info () |
| 381 | { |
| 382 | if (expected_language == current_language) |
| 383 | return; |
| 384 | |
| 385 | expected_language = current_language; |
| 386 | printf_unfiltered (_("Current language: %s\n"), language); |
| 387 | show_language_command (NULL, 1, NULL, NULL); |
| 388 | } |
| 389 | \f |
| 390 | |
| 391 | /* Returns non-zero if the value is a pointer type. */ |
| 392 | int |
| 393 | pointer_type (struct type *type) |
| 394 | { |
| 395 | return type->code () == TYPE_CODE_PTR || TYPE_IS_REFERENCE (type); |
| 396 | } |
| 397 | |
| 398 | \f |
| 399 | /* This page contains functions that return info about |
| 400 | (struct value) values used in GDB. */ |
| 401 | |
| 402 | /* Returns non-zero if the value VAL represents a true value. */ |
| 403 | int |
| 404 | value_true (struct value *val) |
| 405 | { |
| 406 | /* It is possible that we should have some sort of error if a non-boolean |
| 407 | value is used in this context. Possibly dependent on some kind of |
| 408 | "boolean-checking" option like range checking. But it should probably |
| 409 | not depend on the language except insofar as is necessary to identify |
| 410 | a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean |
| 411 | should be an error, probably). */ |
| 412 | return !value_logical_not (val); |
| 413 | } |
| 414 | \f |
| 415 | /* This page contains functions for the printing out of |
| 416 | error messages that occur during type- and range- |
| 417 | checking. */ |
| 418 | |
| 419 | /* This is called when a language fails a range-check. The |
| 420 | first argument should be a printf()-style format string, and the |
| 421 | rest of the arguments should be its arguments. If range_check is |
| 422 | range_check_on, an error is printed; if range_check_warn, a warning; |
| 423 | otherwise just the message. */ |
| 424 | |
| 425 | void |
| 426 | range_error (const char *string,...) |
| 427 | { |
| 428 | va_list args; |
| 429 | |
| 430 | va_start (args, string); |
| 431 | switch (range_check) |
| 432 | { |
| 433 | case range_check_warn: |
| 434 | vwarning (string, args); |
| 435 | break; |
| 436 | case range_check_on: |
| 437 | verror (string, args); |
| 438 | break; |
| 439 | case range_check_off: |
| 440 | /* FIXME: cagney/2002-01-30: Should this function print anything |
| 441 | when range error is off? */ |
| 442 | vfprintf_filtered (gdb_stderr, string, args); |
| 443 | fprintf_filtered (gdb_stderr, "\n"); |
| 444 | break; |
| 445 | default: |
| 446 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 447 | } |
| 448 | va_end (args); |
| 449 | } |
| 450 | \f |
| 451 | |
| 452 | /* This page contains miscellaneous functions. */ |
| 453 | |
| 454 | /* Return the language enum for a given language string. */ |
| 455 | |
| 456 | enum language |
| 457 | language_enum (const char *str) |
| 458 | { |
| 459 | for (const auto &lang : language_defn::languages) |
| 460 | if (strcmp (lang->name (), str) == 0) |
| 461 | return lang->la_language; |
| 462 | |
| 463 | if (strcmp (str, "local") == 0) |
| 464 | return language_auto; |
| 465 | |
| 466 | return language_unknown; |
| 467 | } |
| 468 | |
| 469 | /* Return the language struct for a given language enum. */ |
| 470 | |
| 471 | const struct language_defn * |
| 472 | language_def (enum language lang) |
| 473 | { |
| 474 | const struct language_defn *l = language_defn::languages[lang]; |
| 475 | gdb_assert (l != nullptr); |
| 476 | return l; |
| 477 | } |
| 478 | |
| 479 | /* Return the language as a string. */ |
| 480 | |
| 481 | const char * |
| 482 | language_str (enum language lang) |
| 483 | { |
| 484 | return language_def (lang)->name (); |
| 485 | } |
| 486 | |
| 487 | \f |
| 488 | |
| 489 | /* Build and install the "set language LANG" command. */ |
| 490 | |
| 491 | static void |
| 492 | add_set_language_command () |
| 493 | { |
| 494 | static const char **language_names; |
| 495 | |
| 496 | /* Build the language names array, to be used as enumeration in the |
| 497 | "set language" enum command. +1 for "local" and +1 for NULL |
| 498 | termination. */ |
| 499 | language_names = new const char *[ARRAY_SIZE (language_defn::languages) + 2]; |
| 500 | |
| 501 | /* Display "auto", "local" and "unknown" first, and then the rest, |
| 502 | alpha sorted. */ |
| 503 | const char **language_names_p = language_names; |
| 504 | *language_names_p++ = language_def (language_auto)->name (); |
| 505 | *language_names_p++ = "local"; |
| 506 | *language_names_p++ = language_def (language_unknown)->name (); |
| 507 | const char **sort_begin = language_names_p; |
| 508 | for (const auto &lang : language_defn::languages) |
| 509 | { |
| 510 | /* Already handled above. */ |
| 511 | if (lang->la_language == language_auto |
| 512 | || lang->la_language == language_unknown) |
| 513 | continue; |
| 514 | *language_names_p++ = lang->name (); |
| 515 | } |
| 516 | *language_names_p = NULL; |
| 517 | std::sort (sort_begin, language_names_p, compare_cstrings); |
| 518 | |
| 519 | /* Add the filename extensions. */ |
| 520 | for (const auto &lang : language_defn::languages) |
| 521 | for (const char * const &ext : lang->filename_extensions ()) |
| 522 | add_filename_language (ext, lang->la_language); |
| 523 | |
| 524 | /* Build the "help set language" docs. */ |
| 525 | string_file doc; |
| 526 | |
| 527 | doc.printf (_("Set the current source language.\n" |
| 528 | "The currently understood settings are:\n\nlocal or " |
| 529 | "auto Automatic setting based on source file")); |
| 530 | |
| 531 | for (const auto &lang : language_defn::languages) |
| 532 | { |
| 533 | /* Already dealt with these above. */ |
| 534 | if (lang->la_language == language_unknown |
| 535 | || lang->la_language == language_auto) |
| 536 | continue; |
| 537 | |
| 538 | /* Note that we add the newline at the front, so we don't wind |
| 539 | up with a trailing newline. */ |
| 540 | doc.printf ("\n%-16s Use the %s language", |
| 541 | lang->name (), |
| 542 | lang->natural_name ()); |
| 543 | } |
| 544 | |
| 545 | add_setshow_enum_cmd ("language", class_support, |
| 546 | language_names, |
| 547 | &language, |
| 548 | doc.c_str (), |
| 549 | _("Show the current source language."), |
| 550 | NULL, set_language_command, |
| 551 | show_language_command, |
| 552 | &setlist, &showlist); |
| 553 | } |
| 554 | |
| 555 | /* Iterate through all registered languages looking for and calling |
| 556 | any non-NULL struct language_defn.skip_trampoline() functions. |
| 557 | Return the result from the first that returns non-zero, or 0 if all |
| 558 | `fail'. */ |
| 559 | CORE_ADDR |
| 560 | skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc) |
| 561 | { |
| 562 | for (const auto &lang : language_defn::languages) |
| 563 | { |
| 564 | CORE_ADDR real_pc = lang->skip_trampoline (frame, pc); |
| 565 | |
| 566 | if (real_pc != 0) |
| 567 | return real_pc; |
| 568 | } |
| 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | /* Return demangled language symbol, or NULL. |
| 574 | FIXME: Options are only useful for certain languages and ignored |
| 575 | by others, so it would be better to remove them here and have a |
| 576 | more flexible demangler for the languages that need it. |
| 577 | FIXME: Sometimes the demangler is invoked when we don't know the |
| 578 | language, so we can't use this everywhere. */ |
| 579 | char * |
| 580 | language_demangle (const struct language_defn *current_language, |
| 581 | const char *mangled, int options) |
| 582 | { |
| 583 | if (current_language != NULL) |
| 584 | return current_language->demangle_symbol (mangled, options); |
| 585 | return NULL; |
| 586 | } |
| 587 | |
| 588 | /* Return information about whether TYPE should be passed |
| 589 | (and returned) by reference at the language level. */ |
| 590 | |
| 591 | struct language_pass_by_ref_info |
| 592 | language_pass_by_reference (struct type *type) |
| 593 | { |
| 594 | return current_language->pass_by_reference_info (type); |
| 595 | } |
| 596 | |
| 597 | /* Return the default string containing the list of characters |
| 598 | delimiting words. This is a reasonable default value that |
| 599 | most languages should be able to use. */ |
| 600 | |
| 601 | const char * |
| 602 | default_word_break_characters (void) |
| 603 | { |
| 604 | return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| 605 | } |
| 606 | |
| 607 | /* See language.h. */ |
| 608 | |
| 609 | void |
| 610 | language_defn::print_array_index (struct type *index_type, LONGEST index, |
| 611 | struct ui_file *stream, |
| 612 | const value_print_options *options) const |
| 613 | { |
| 614 | struct value *index_value = value_from_longest (index_type, index); |
| 615 | |
| 616 | fprintf_filtered (stream, "["); |
| 617 | value_print (index_value, stream, options); |
| 618 | fprintf_filtered (stream, "] = "); |
| 619 | } |
| 620 | |
| 621 | /* See language.h. */ |
| 622 | |
| 623 | gdb::unique_xmalloc_ptr<char> |
| 624 | language_defn::watch_location_expression (struct type *type, |
| 625 | CORE_ADDR addr) const |
| 626 | { |
| 627 | /* Generates an expression that assumes a C like syntax is valid. */ |
| 628 | type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type))); |
| 629 | std::string name = type_to_string (type); |
| 630 | return gdb::unique_xmalloc_ptr<char> |
| 631 | (xstrprintf ("* (%s *) %s", name.c_str (), core_addr_to_string (addr))); |
| 632 | } |
| 633 | |
| 634 | /* See language.h. */ |
| 635 | |
| 636 | void |
| 637 | language_defn::value_print (struct value *val, struct ui_file *stream, |
| 638 | const struct value_print_options *options) const |
| 639 | { |
| 640 | return c_value_print (val, stream, options); |
| 641 | } |
| 642 | |
| 643 | /* See language.h. */ |
| 644 | |
| 645 | int |
| 646 | language_defn::parser (struct parser_state *ps) const |
| 647 | { |
| 648 | return c_parse (ps); |
| 649 | } |
| 650 | |
| 651 | /* See language.h. */ |
| 652 | |
| 653 | void |
| 654 | language_defn::value_print_inner |
| 655 | (struct value *val, struct ui_file *stream, int recurse, |
| 656 | const struct value_print_options *options) const |
| 657 | { |
| 658 | return c_value_print_inner (val, stream, recurse, options); |
| 659 | } |
| 660 | |
| 661 | /* See language.h. */ |
| 662 | |
| 663 | void |
| 664 | language_defn::emitchar (int ch, struct type *chtype, |
| 665 | struct ui_file * stream, int quoter) const |
| 666 | { |
| 667 | c_emit_char (ch, chtype, stream, quoter); |
| 668 | } |
| 669 | |
| 670 | /* See language.h. */ |
| 671 | |
| 672 | void |
| 673 | language_defn::printstr (struct ui_file *stream, struct type *elttype, |
| 674 | const gdb_byte *string, unsigned int length, |
| 675 | const char *encoding, int force_ellipses, |
| 676 | const struct value_print_options *options) const |
| 677 | { |
| 678 | c_printstr (stream, elttype, string, length, encoding, force_ellipses, |
| 679 | options); |
| 680 | } |
| 681 | |
| 682 | /* See language.h. */ |
| 683 | |
| 684 | void |
| 685 | language_defn::print_typedef (struct type *type, struct symbol *new_symbol, |
| 686 | struct ui_file *stream) const |
| 687 | { |
| 688 | c_print_typedef (type, new_symbol, stream); |
| 689 | } |
| 690 | |
| 691 | /* See language.h. */ |
| 692 | |
| 693 | bool |
| 694 | language_defn::is_string_type_p (struct type *type) const |
| 695 | { |
| 696 | return c_is_string_type_p (type); |
| 697 | } |
| 698 | |
| 699 | /* See language.h. */ |
| 700 | |
| 701 | std::unique_ptr<compile_instance> |
| 702 | language_defn::get_compile_instance () const |
| 703 | { |
| 704 | return {}; |
| 705 | } |
| 706 | |
| 707 | /* The default implementation of the get_symbol_name_matcher_inner method |
| 708 | from the language_defn class. Matches with strncmp_iw. */ |
| 709 | |
| 710 | static bool |
| 711 | default_symbol_name_matcher (const char *symbol_search_name, |
| 712 | const lookup_name_info &lookup_name, |
| 713 | completion_match_result *comp_match_res) |
| 714 | { |
| 715 | gdb::string_view name = lookup_name.name (); |
| 716 | completion_match_for_lcd *match_for_lcd |
| 717 | = (comp_match_res != NULL ? &comp_match_res->match_for_lcd : NULL); |
| 718 | strncmp_iw_mode mode = (lookup_name.completion_mode () |
| 719 | ? strncmp_iw_mode::NORMAL |
| 720 | : strncmp_iw_mode::MATCH_PARAMS); |
| 721 | |
| 722 | if (strncmp_iw_with_mode (symbol_search_name, name.data (), name.size (), |
| 723 | mode, language_minimal, match_for_lcd) == 0) |
| 724 | { |
| 725 | if (comp_match_res != NULL) |
| 726 | comp_match_res->set_match (symbol_search_name); |
| 727 | return true; |
| 728 | } |
| 729 | else |
| 730 | return false; |
| 731 | } |
| 732 | |
| 733 | /* See language.h. */ |
| 734 | |
| 735 | symbol_name_matcher_ftype * |
| 736 | language_defn::get_symbol_name_matcher |
| 737 | (const lookup_name_info &lookup_name) const |
| 738 | { |
| 739 | /* If currently in Ada mode, and the lookup name is wrapped in |
| 740 | '<...>', hijack all symbol name comparisons using the Ada |
| 741 | matcher, which handles the verbatim matching. */ |
| 742 | if (current_language->la_language == language_ada |
| 743 | && lookup_name.ada ().verbatim_p ()) |
| 744 | return current_language->get_symbol_name_matcher_inner (lookup_name); |
| 745 | |
| 746 | return this->get_symbol_name_matcher_inner (lookup_name); |
| 747 | } |
| 748 | |
| 749 | /* See language.h. */ |
| 750 | |
| 751 | symbol_name_matcher_ftype * |
| 752 | language_defn::get_symbol_name_matcher_inner |
| 753 | (const lookup_name_info &lookup_name) const |
| 754 | { |
| 755 | return default_symbol_name_matcher; |
| 756 | } |
| 757 | |
| 758 | /* See language.h. */ |
| 759 | |
| 760 | const struct lang_varobj_ops * |
| 761 | language_defn::varobj_ops () const |
| 762 | { |
| 763 | /* The ops for the C language are suitable for the vast majority of the |
| 764 | supported languages. */ |
| 765 | return &c_varobj_ops; |
| 766 | } |
| 767 | |
| 768 | /* Parent class for both the "auto" and "unknown" languages. These two |
| 769 | pseudo-languages are very similar so merging their implementations like |
| 770 | this makes sense. */ |
| 771 | |
| 772 | class auto_or_unknown_language : public language_defn |
| 773 | { |
| 774 | public: |
| 775 | auto_or_unknown_language (enum language lang) |
| 776 | : language_defn (lang) |
| 777 | { /* Nothing. */ } |
| 778 | |
| 779 | /* See language.h. */ |
| 780 | void language_arch_info (struct gdbarch *gdbarch, |
| 781 | struct language_arch_info *lai) const override |
| 782 | { |
| 783 | lai->set_string_char_type (builtin_type (gdbarch)->builtin_char); |
| 784 | lai->set_bool_type (builtin_type (gdbarch)->builtin_int); |
| 785 | } |
| 786 | |
| 787 | /* See language.h. */ |
| 788 | |
| 789 | void print_type (struct type *type, const char *varstring, |
| 790 | struct ui_file *stream, int show, int level, |
| 791 | const struct type_print_options *flags) const override |
| 792 | { |
| 793 | error (_("type printing not implemented for language \"%s\""), |
| 794 | natural_name ()); |
| 795 | } |
| 796 | |
| 797 | /* See language.h. */ |
| 798 | |
| 799 | char *demangle_symbol (const char *mangled, int options) const override |
| 800 | { |
| 801 | /* The auto language just uses the C++ demangler. */ |
| 802 | return gdb_demangle (mangled, options); |
| 803 | } |
| 804 | |
| 805 | /* See language.h. */ |
| 806 | |
| 807 | void value_print (struct value *val, struct ui_file *stream, |
| 808 | const struct value_print_options *options) const override |
| 809 | { |
| 810 | error (_("value printing not implemented for language \"%s\""), |
| 811 | natural_name ()); |
| 812 | } |
| 813 | |
| 814 | /* See language.h. */ |
| 815 | |
| 816 | void value_print_inner |
| 817 | (struct value *val, struct ui_file *stream, int recurse, |
| 818 | const struct value_print_options *options) const override |
| 819 | { |
| 820 | error (_("inner value printing not implemented for language \"%s\""), |
| 821 | natural_name ()); |
| 822 | } |
| 823 | |
| 824 | /* See language.h. */ |
| 825 | |
| 826 | int parser (struct parser_state *ps) const override |
| 827 | { |
| 828 | error (_("expression parsing not implemented for language \"%s\""), |
| 829 | natural_name ()); |
| 830 | } |
| 831 | |
| 832 | /* See language.h. */ |
| 833 | |
| 834 | void emitchar (int ch, struct type *chtype, |
| 835 | struct ui_file *stream, int quoter) const override |
| 836 | { |
| 837 | error (_("emit character not implemented for language \"%s\""), |
| 838 | natural_name ()); |
| 839 | } |
| 840 | |
| 841 | /* See language.h. */ |
| 842 | |
| 843 | void printchar (int ch, struct type *chtype, |
| 844 | struct ui_file *stream) const override |
| 845 | { |
| 846 | error (_("print character not implemented for language \"%s\""), |
| 847 | natural_name ()); |
| 848 | } |
| 849 | |
| 850 | /* See language.h. */ |
| 851 | |
| 852 | void printstr (struct ui_file *stream, struct type *elttype, |
| 853 | const gdb_byte *string, unsigned int length, |
| 854 | const char *encoding, int force_ellipses, |
| 855 | const struct value_print_options *options) const override |
| 856 | { |
| 857 | error (_("print string not implemented for language \"%s\""), |
| 858 | natural_name ()); |
| 859 | } |
| 860 | |
| 861 | /* See language.h. */ |
| 862 | |
| 863 | void print_typedef (struct type *type, struct symbol *new_symbol, |
| 864 | struct ui_file *stream) const override |
| 865 | { |
| 866 | error (_("print typedef not implemented for language \"%s\""), |
| 867 | natural_name ()); |
| 868 | } |
| 869 | |
| 870 | /* See language.h. */ |
| 871 | |
| 872 | bool is_string_type_p (struct type *type) const override |
| 873 | { |
| 874 | type = check_typedef (type); |
| 875 | while (type->code () == TYPE_CODE_REF) |
| 876 | { |
| 877 | type = TYPE_TARGET_TYPE (type); |
| 878 | type = check_typedef (type); |
| 879 | } |
| 880 | return (type->code () == TYPE_CODE_STRING); |
| 881 | } |
| 882 | |
| 883 | /* See language.h. */ |
| 884 | |
| 885 | const char *name_of_this () const override |
| 886 | { return "this"; } |
| 887 | }; |
| 888 | |
| 889 | /* Class representing the fake "auto" language. */ |
| 890 | |
| 891 | class auto_language : public auto_or_unknown_language |
| 892 | { |
| 893 | public: |
| 894 | auto_language () |
| 895 | : auto_or_unknown_language (language_auto) |
| 896 | { /* Nothing. */ } |
| 897 | |
| 898 | /* See language.h. */ |
| 899 | |
| 900 | const char *name () const override |
| 901 | { return "auto"; } |
| 902 | |
| 903 | /* See language.h. */ |
| 904 | |
| 905 | const char *natural_name () const override |
| 906 | { return "Auto"; } |
| 907 | }; |
| 908 | |
| 909 | /* Single instance of the fake "auto" language. */ |
| 910 | |
| 911 | static auto_language auto_language_defn; |
| 912 | |
| 913 | /* Class representing the unknown language. */ |
| 914 | |
| 915 | class unknown_language : public auto_or_unknown_language |
| 916 | { |
| 917 | public: |
| 918 | unknown_language () |
| 919 | : auto_or_unknown_language (language_unknown) |
| 920 | { /* Nothing. */ } |
| 921 | |
| 922 | /* See language.h. */ |
| 923 | |
| 924 | const char *name () const override |
| 925 | { return "unknown"; } |
| 926 | |
| 927 | /* See language.h. */ |
| 928 | |
| 929 | const char *natural_name () const override |
| 930 | { return "Unknown"; } |
| 931 | |
| 932 | /* See language.h. */ |
| 933 | |
| 934 | bool store_sym_names_in_linkage_form_p () const override |
| 935 | { return true; } |
| 936 | }; |
| 937 | |
| 938 | /* Single instance of the unknown language class. */ |
| 939 | |
| 940 | static unknown_language unknown_language_defn; |
| 941 | |
| 942 | \f |
| 943 | /* Per-architecture language information. */ |
| 944 | |
| 945 | static struct gdbarch_data *language_gdbarch_data; |
| 946 | |
| 947 | struct language_gdbarch |
| 948 | { |
| 949 | /* A vector of per-language per-architecture info. Indexed by "enum |
| 950 | language". */ |
| 951 | struct language_arch_info arch_info[nr_languages]; |
| 952 | }; |
| 953 | |
| 954 | static void * |
| 955 | language_gdbarch_post_init (struct gdbarch *gdbarch) |
| 956 | { |
| 957 | struct language_gdbarch *l |
| 958 | = obstack_new<struct language_gdbarch> (gdbarch_obstack (gdbarch)); |
| 959 | for (const auto &lang : language_defn::languages) |
| 960 | { |
| 961 | gdb_assert (lang != nullptr); |
| 962 | lang->language_arch_info (gdbarch, &l->arch_info[lang->la_language]); |
| 963 | } |
| 964 | |
| 965 | return l; |
| 966 | } |
| 967 | |
| 968 | /* See language.h. */ |
| 969 | |
| 970 | struct type * |
| 971 | language_string_char_type (const struct language_defn *la, |
| 972 | struct gdbarch *gdbarch) |
| 973 | { |
| 974 | struct language_gdbarch *ld |
| 975 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 976 | return ld->arch_info[la->la_language].string_char_type (); |
| 977 | } |
| 978 | |
| 979 | /* See language.h. */ |
| 980 | |
| 981 | struct type * |
| 982 | language_bool_type (const struct language_defn *la, |
| 983 | struct gdbarch *gdbarch) |
| 984 | { |
| 985 | struct language_gdbarch *ld |
| 986 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 987 | return ld->arch_info[la->la_language].bool_type (); |
| 988 | } |
| 989 | |
| 990 | /* See language.h. */ |
| 991 | |
| 992 | struct type * |
| 993 | language_arch_info::bool_type () const |
| 994 | { |
| 995 | if (m_bool_type_name != nullptr) |
| 996 | { |
| 997 | struct symbol *sym; |
| 998 | |
| 999 | sym = lookup_symbol (m_bool_type_name, NULL, VAR_DOMAIN, NULL).symbol; |
| 1000 | if (sym != nullptr) |
| 1001 | { |
| 1002 | struct type *type = SYMBOL_TYPE (sym); |
| 1003 | if (type != nullptr && type->code () == TYPE_CODE_BOOL) |
| 1004 | return type; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | return m_bool_type_default; |
| 1009 | } |
| 1010 | |
| 1011 | /* See language.h. */ |
| 1012 | |
| 1013 | struct symbol * |
| 1014 | language_arch_info::type_and_symbol::alloc_type_symbol |
| 1015 | (enum language lang, struct type *type) |
| 1016 | { |
| 1017 | struct symbol *symbol; |
| 1018 | struct gdbarch *gdbarch; |
| 1019 | gdb_assert (!type->is_objfile_owned ()); |
| 1020 | gdbarch = type->arch_owner (); |
| 1021 | symbol = new (gdbarch_obstack (gdbarch)) struct symbol (); |
| 1022 | symbol->m_name = type->name (); |
| 1023 | symbol->set_language (lang, nullptr); |
| 1024 | symbol->owner.arch = gdbarch; |
| 1025 | SYMBOL_OBJFILE_OWNED (symbol) = 0; |
| 1026 | symbol->set_section_index (0); |
| 1027 | SYMBOL_TYPE (symbol) = type; |
| 1028 | SYMBOL_DOMAIN (symbol) = VAR_DOMAIN; |
| 1029 | SYMBOL_ACLASS_INDEX (symbol) = LOC_TYPEDEF; |
| 1030 | return symbol; |
| 1031 | } |
| 1032 | |
| 1033 | /* See language.h. */ |
| 1034 | |
| 1035 | language_arch_info::type_and_symbol * |
| 1036 | language_arch_info::lookup_primitive_type_and_symbol (const char *name) |
| 1037 | { |
| 1038 | for (struct type_and_symbol &tas : primitive_types_and_symbols) |
| 1039 | { |
| 1040 | if (strcmp (tas.type ()->name (), name) == 0) |
| 1041 | return &tas; |
| 1042 | } |
| 1043 | |
| 1044 | return nullptr; |
| 1045 | } |
| 1046 | |
| 1047 | /* See language.h. */ |
| 1048 | |
| 1049 | struct type * |
| 1050 | language_arch_info::lookup_primitive_type (const char *name) |
| 1051 | { |
| 1052 | type_and_symbol *tas = lookup_primitive_type_and_symbol (name); |
| 1053 | if (tas != nullptr) |
| 1054 | return tas->type (); |
| 1055 | return nullptr; |
| 1056 | } |
| 1057 | |
| 1058 | /* See language.h. */ |
| 1059 | |
| 1060 | struct type * |
| 1061 | language_arch_info::lookup_primitive_type |
| 1062 | (gdb::function_view<bool (struct type *)> filter) |
| 1063 | { |
| 1064 | for (struct type_and_symbol &tas : primitive_types_and_symbols) |
| 1065 | { |
| 1066 | if (filter (tas.type ())) |
| 1067 | return tas.type (); |
| 1068 | } |
| 1069 | |
| 1070 | return nullptr; |
| 1071 | } |
| 1072 | |
| 1073 | /* See language.h. */ |
| 1074 | |
| 1075 | struct symbol * |
| 1076 | language_arch_info::lookup_primitive_type_as_symbol (const char *name, |
| 1077 | enum language lang) |
| 1078 | { |
| 1079 | type_and_symbol *tas = lookup_primitive_type_and_symbol (name); |
| 1080 | if (tas != nullptr) |
| 1081 | return tas->symbol (lang); |
| 1082 | return nullptr; |
| 1083 | } |
| 1084 | |
| 1085 | /* Helper for the language_lookup_primitive_type overloads to forward |
| 1086 | to the corresponding language's lookup_primitive_type overload. */ |
| 1087 | |
| 1088 | template<typename T> |
| 1089 | static struct type * |
| 1090 | language_lookup_primitive_type_1 (const struct language_defn *la, |
| 1091 | struct gdbarch *gdbarch, |
| 1092 | T arg) |
| 1093 | { |
| 1094 | struct language_gdbarch *ld = |
| 1095 | (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 1096 | return ld->arch_info[la->la_language].lookup_primitive_type (arg); |
| 1097 | } |
| 1098 | |
| 1099 | /* See language.h. */ |
| 1100 | |
| 1101 | struct type * |
| 1102 | language_lookup_primitive_type (const struct language_defn *la, |
| 1103 | struct gdbarch *gdbarch, |
| 1104 | const char *name) |
| 1105 | { |
| 1106 | return language_lookup_primitive_type_1 (la, gdbarch, name); |
| 1107 | } |
| 1108 | |
| 1109 | /* See language.h. */ |
| 1110 | |
| 1111 | struct type * |
| 1112 | language_lookup_primitive_type (const struct language_defn *la, |
| 1113 | struct gdbarch *gdbarch, |
| 1114 | gdb::function_view<bool (struct type *)> filter) |
| 1115 | { |
| 1116 | return language_lookup_primitive_type_1 (la, gdbarch, filter); |
| 1117 | } |
| 1118 | |
| 1119 | /* See language.h. */ |
| 1120 | |
| 1121 | struct symbol * |
| 1122 | language_lookup_primitive_type_as_symbol (const struct language_defn *la, |
| 1123 | struct gdbarch *gdbarch, |
| 1124 | const char *name) |
| 1125 | { |
| 1126 | struct language_gdbarch *ld |
| 1127 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 1128 | struct language_arch_info *lai = &ld->arch_info[la->la_language]; |
| 1129 | |
| 1130 | if (symbol_lookup_debug) |
| 1131 | fprintf_unfiltered (gdb_stdlog, |
| 1132 | "language_lookup_primitive_type_as_symbol" |
| 1133 | " (%s, %s, %s)", |
| 1134 | la->name (), host_address_to_string (gdbarch), name); |
| 1135 | |
| 1136 | struct symbol *sym |
| 1137 | = lai->lookup_primitive_type_as_symbol (name, la->la_language); |
| 1138 | |
| 1139 | if (symbol_lookup_debug) |
| 1140 | fprintf_unfiltered (gdb_stdlog, " = %s\n", host_address_to_string (sym)); |
| 1141 | |
| 1142 | /* Note: The result of symbol lookup is normally a symbol *and* the block |
| 1143 | it was found in. Builtin types don't live in blocks. We *could* give |
| 1144 | them one, but there is no current need so to keep things simple symbol |
| 1145 | lookup is extended to allow for BLOCK_FOUND to be NULL. */ |
| 1146 | |
| 1147 | return sym; |
| 1148 | } |
| 1149 | |
| 1150 | /* Initialize the language routines. */ |
| 1151 | |
| 1152 | void _initialize_language (); |
| 1153 | void |
| 1154 | _initialize_language () |
| 1155 | { |
| 1156 | static const char *const type_or_range_names[] |
| 1157 | = { "on", "off", "warn", "auto", NULL }; |
| 1158 | |
| 1159 | static const char *const case_sensitive_names[] |
| 1160 | = { "on", "off", "auto", NULL }; |
| 1161 | |
| 1162 | language_gdbarch_data |
| 1163 | = gdbarch_data_register_post_init (language_gdbarch_post_init); |
| 1164 | |
| 1165 | /* GDB commands for language specific stuff. */ |
| 1166 | |
| 1167 | cmd_list_element *set_check_cmd |
| 1168 | = add_basic_prefix_cmd ("check", no_class, |
| 1169 | _("Set the status of the type/range checker."), |
| 1170 | &setchecklist, 0, &setlist); |
| 1171 | add_alias_cmd ("c", set_check_cmd, no_class, 1, &setlist); |
| 1172 | add_alias_cmd ("ch", set_check_cmd, no_class, 1, &setlist); |
| 1173 | |
| 1174 | cmd_list_element *show_check_cmd |
| 1175 | = add_show_prefix_cmd ("check", no_class, |
| 1176 | _("Show the status of the type/range checker."), |
| 1177 | &showchecklist, 0, &showlist); |
| 1178 | add_alias_cmd ("c", show_check_cmd, no_class, 1, &showlist); |
| 1179 | add_alias_cmd ("ch", show_check_cmd, no_class, 1, &showlist); |
| 1180 | |
| 1181 | add_setshow_enum_cmd ("range", class_support, type_or_range_names, |
| 1182 | &range, |
| 1183 | _("Set range checking (on/warn/off/auto)."), |
| 1184 | _("Show range checking (on/warn/off/auto)."), |
| 1185 | NULL, set_range_command, |
| 1186 | show_range_command, |
| 1187 | &setchecklist, &showchecklist); |
| 1188 | |
| 1189 | add_setshow_enum_cmd ("case-sensitive", class_support, case_sensitive_names, |
| 1190 | &case_sensitive, _("\ |
| 1191 | Set case sensitivity in name search (on/off/auto)."), _("\ |
| 1192 | Show case sensitivity in name search (on/off/auto)."), _("\ |
| 1193 | For Fortran the default is off; for other languages the default is on."), |
| 1194 | set_case_command, |
| 1195 | show_case_command, |
| 1196 | &setlist, &showlist); |
| 1197 | |
| 1198 | /* In order to call SET_LANGUAGE (below) we need to make sure that |
| 1199 | CURRENT_LANGUAGE is not NULL. So first set the language to unknown, |
| 1200 | then we can change the language to 'auto'. */ |
| 1201 | current_language = language_def (language_unknown); |
| 1202 | |
| 1203 | add_set_language_command (); |
| 1204 | |
| 1205 | language = "auto"; |
| 1206 | range = "auto"; |
| 1207 | case_sensitive = "auto"; |
| 1208 | |
| 1209 | /* Have the above take effect. */ |
| 1210 | set_language (language_auto); |
| 1211 | } |