| 1 | /* Multiple source language support for GDB. |
| 2 | |
| 3 | Copyright (C) 1991-2019 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 | |
| 49 | static int unk_lang_parser (struct parser_state *); |
| 50 | |
| 51 | static void set_range_case (void); |
| 52 | |
| 53 | static void unk_lang_emit_char (int c, struct type *type, |
| 54 | struct ui_file *stream, int quoter); |
| 55 | |
| 56 | static void unk_lang_printchar (int c, struct type *type, |
| 57 | struct ui_file *stream); |
| 58 | |
| 59 | static void unk_lang_value_print (struct value *, struct ui_file *, |
| 60 | const struct value_print_options *); |
| 61 | |
| 62 | static CORE_ADDR unk_lang_trampoline (struct frame_info *, CORE_ADDR pc); |
| 63 | |
| 64 | /* Forward declaration */ |
| 65 | extern const struct language_defn unknown_language_defn; |
| 66 | |
| 67 | /* The current (default at startup) state of type and range checking. |
| 68 | (If the modes are set to "auto", though, these are changed based |
| 69 | on the default language at startup, and then again based on the |
| 70 | language of the first source file. */ |
| 71 | |
| 72 | enum range_mode range_mode = range_mode_auto; |
| 73 | enum range_check range_check = range_check_off; |
| 74 | enum case_mode case_mode = case_mode_auto; |
| 75 | enum case_sensitivity case_sensitivity = case_sensitive_on; |
| 76 | |
| 77 | /* The current language and language_mode (see language.h). */ |
| 78 | |
| 79 | const struct language_defn *current_language = &unknown_language_defn; |
| 80 | enum language_mode language_mode = language_mode_auto; |
| 81 | |
| 82 | /* The language that the user expects to be typing in (the language |
| 83 | of main(), or the last language we notified them about, or C). */ |
| 84 | |
| 85 | const struct language_defn *expected_language; |
| 86 | |
| 87 | /* The list of supported languages. Keep this in the same order as |
| 88 | the 'enum language' values. */ |
| 89 | |
| 90 | static const struct language_defn *languages[] = { |
| 91 | &unknown_language_defn, |
| 92 | &auto_language_defn, |
| 93 | &c_language_defn, |
| 94 | &objc_language_defn, |
| 95 | &cplus_language_defn, |
| 96 | &d_language_defn, |
| 97 | &go_language_defn, |
| 98 | &f_language_defn, |
| 99 | &m2_language_defn, |
| 100 | &asm_language_defn, |
| 101 | &pascal_language_defn, |
| 102 | &opencl_language_defn, |
| 103 | &rust_language_defn, |
| 104 | &minimal_language_defn, |
| 105 | &ada_language_defn, |
| 106 | }; |
| 107 | |
| 108 | /* The current values of the "set language/range/case-sensitive" enum |
| 109 | commands. */ |
| 110 | static const char *language; |
| 111 | static const char *range; |
| 112 | static const char *case_sensitive; |
| 113 | |
| 114 | /* Warning issued when current_language and the language of the current |
| 115 | frame do not match. */ |
| 116 | char lang_frame_mismatch_warn[] = |
| 117 | "Warning: the current language does not match this frame."; |
| 118 | \f |
| 119 | /* This page contains the functions corresponding to GDB commands |
| 120 | and their helpers. */ |
| 121 | |
| 122 | /* Show command. Display a warning if the language set |
| 123 | does not match the frame. */ |
| 124 | static void |
| 125 | show_language_command (struct ui_file *file, int from_tty, |
| 126 | struct cmd_list_element *c, const char *value) |
| 127 | { |
| 128 | enum language flang; /* The language of the frame. */ |
| 129 | |
| 130 | if (language_mode == language_mode_auto) |
| 131 | fprintf_filtered (gdb_stdout, |
| 132 | _("The current source language is " |
| 133 | "\"auto; currently %s\".\n"), |
| 134 | current_language->la_name); |
| 135 | else |
| 136 | fprintf_filtered (gdb_stdout, |
| 137 | _("The current source language is \"%s\".\n"), |
| 138 | current_language->la_name); |
| 139 | |
| 140 | if (has_stack_frames ()) |
| 141 | { |
| 142 | struct frame_info *frame; |
| 143 | |
| 144 | frame = get_selected_frame (NULL); |
| 145 | flang = get_frame_language (frame); |
| 146 | if (flang != language_unknown |
| 147 | && language_mode == language_mode_manual |
| 148 | && current_language->la_language != flang) |
| 149 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | /* Set command. Change the current working language. */ |
| 154 | static void |
| 155 | set_language_command (const char *ignore, |
| 156 | int from_tty, struct cmd_list_element *c) |
| 157 | { |
| 158 | enum language flang = language_unknown; |
| 159 | |
| 160 | /* "local" is a synonym of "auto". */ |
| 161 | if (strcmp (language, "local") == 0) |
| 162 | language = "auto"; |
| 163 | |
| 164 | /* Search the list of languages for a match. */ |
| 165 | for (const auto &lang : languages) |
| 166 | { |
| 167 | if (strcmp (lang->la_name, language) == 0) |
| 168 | { |
| 169 | /* Found it! Go into manual mode, and use this language. */ |
| 170 | if (lang->la_language == language_auto) |
| 171 | { |
| 172 | /* Enter auto mode. Set to the current frame's language, if |
| 173 | known, or fallback to the initial language. */ |
| 174 | language_mode = language_mode_auto; |
| 175 | try |
| 176 | { |
| 177 | struct frame_info *frame; |
| 178 | |
| 179 | frame = get_selected_frame (NULL); |
| 180 | flang = get_frame_language (frame); |
| 181 | } |
| 182 | catch (const gdb_exception_error &ex) |
| 183 | { |
| 184 | flang = language_unknown; |
| 185 | } |
| 186 | |
| 187 | if (flang != language_unknown) |
| 188 | set_language (flang); |
| 189 | else |
| 190 | set_initial_language (); |
| 191 | expected_language = current_language; |
| 192 | return; |
| 193 | } |
| 194 | else |
| 195 | { |
| 196 | /* Enter manual mode. Set the specified language. */ |
| 197 | language_mode = language_mode_manual; |
| 198 | current_language = lang; |
| 199 | set_range_case (); |
| 200 | expected_language = current_language; |
| 201 | return; |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | internal_error (__FILE__, __LINE__, |
| 207 | "Couldn't find language `%s' in known languages list.", |
| 208 | language); |
| 209 | } |
| 210 | |
| 211 | /* Show command. Display a warning if the range setting does |
| 212 | not match the current language. */ |
| 213 | static void |
| 214 | show_range_command (struct ui_file *file, int from_tty, |
| 215 | struct cmd_list_element *c, const char *value) |
| 216 | { |
| 217 | if (range_mode == range_mode_auto) |
| 218 | { |
| 219 | const char *tmp; |
| 220 | |
| 221 | switch (range_check) |
| 222 | { |
| 223 | case range_check_on: |
| 224 | tmp = "on"; |
| 225 | break; |
| 226 | case range_check_off: |
| 227 | tmp = "off"; |
| 228 | break; |
| 229 | case range_check_warn: |
| 230 | tmp = "warn"; |
| 231 | break; |
| 232 | default: |
| 233 | internal_error (__FILE__, __LINE__, |
| 234 | "Unrecognized range check setting."); |
| 235 | } |
| 236 | |
| 237 | fprintf_filtered (gdb_stdout, |
| 238 | _("Range checking is \"auto; currently %s\".\n"), |
| 239 | tmp); |
| 240 | } |
| 241 | else |
| 242 | fprintf_filtered (gdb_stdout, _("Range checking is \"%s\".\n"), |
| 243 | value); |
| 244 | |
| 245 | if (range_check != current_language->la_range_check) |
| 246 | warning (_("the current range check setting " |
| 247 | "does not match the language.\n")); |
| 248 | } |
| 249 | |
| 250 | /* Set command. Change the setting for range checking. */ |
| 251 | static void |
| 252 | set_range_command (const char *ignore, |
| 253 | int from_tty, struct cmd_list_element *c) |
| 254 | { |
| 255 | if (strcmp (range, "on") == 0) |
| 256 | { |
| 257 | range_check = range_check_on; |
| 258 | range_mode = range_mode_manual; |
| 259 | } |
| 260 | else if (strcmp (range, "warn") == 0) |
| 261 | { |
| 262 | range_check = range_check_warn; |
| 263 | range_mode = range_mode_manual; |
| 264 | } |
| 265 | else if (strcmp (range, "off") == 0) |
| 266 | { |
| 267 | range_check = range_check_off; |
| 268 | range_mode = range_mode_manual; |
| 269 | } |
| 270 | else if (strcmp (range, "auto") == 0) |
| 271 | { |
| 272 | range_mode = range_mode_auto; |
| 273 | set_range_case (); |
| 274 | return; |
| 275 | } |
| 276 | else |
| 277 | { |
| 278 | internal_error (__FILE__, __LINE__, |
| 279 | _("Unrecognized range check setting: \"%s\""), range); |
| 280 | } |
| 281 | if (range_check != current_language->la_range_check) |
| 282 | warning (_("the current range check setting " |
| 283 | "does not match the language.\n")); |
| 284 | } |
| 285 | |
| 286 | /* Show command. Display a warning if the case sensitivity setting does |
| 287 | not match the current language. */ |
| 288 | static void |
| 289 | show_case_command (struct ui_file *file, int from_tty, |
| 290 | struct cmd_list_element *c, const char *value) |
| 291 | { |
| 292 | if (case_mode == case_mode_auto) |
| 293 | { |
| 294 | const char *tmp = NULL; |
| 295 | |
| 296 | switch (case_sensitivity) |
| 297 | { |
| 298 | case case_sensitive_on: |
| 299 | tmp = "on"; |
| 300 | break; |
| 301 | case case_sensitive_off: |
| 302 | tmp = "off"; |
| 303 | break; |
| 304 | default: |
| 305 | internal_error (__FILE__, __LINE__, |
| 306 | "Unrecognized case-sensitive setting."); |
| 307 | } |
| 308 | |
| 309 | fprintf_filtered (gdb_stdout, |
| 310 | _("Case sensitivity in " |
| 311 | "name search is \"auto; currently %s\".\n"), |
| 312 | tmp); |
| 313 | } |
| 314 | else |
| 315 | fprintf_filtered (gdb_stdout, |
| 316 | _("Case sensitivity in name search is \"%s\".\n"), |
| 317 | value); |
| 318 | |
| 319 | if (case_sensitivity != current_language->la_case_sensitivity) |
| 320 | warning (_("the current case sensitivity setting does not match " |
| 321 | "the language.\n")); |
| 322 | } |
| 323 | |
| 324 | /* Set command. Change the setting for case sensitivity. */ |
| 325 | |
| 326 | static void |
| 327 | set_case_command (const char *ignore, int from_tty, struct cmd_list_element *c) |
| 328 | { |
| 329 | if (strcmp (case_sensitive, "on") == 0) |
| 330 | { |
| 331 | case_sensitivity = case_sensitive_on; |
| 332 | case_mode = case_mode_manual; |
| 333 | } |
| 334 | else if (strcmp (case_sensitive, "off") == 0) |
| 335 | { |
| 336 | case_sensitivity = case_sensitive_off; |
| 337 | case_mode = case_mode_manual; |
| 338 | } |
| 339 | else if (strcmp (case_sensitive, "auto") == 0) |
| 340 | { |
| 341 | case_mode = case_mode_auto; |
| 342 | set_range_case (); |
| 343 | return; |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | internal_error (__FILE__, __LINE__, |
| 348 | "Unrecognized case-sensitive setting: \"%s\"", |
| 349 | case_sensitive); |
| 350 | } |
| 351 | |
| 352 | if (case_sensitivity != current_language->la_case_sensitivity) |
| 353 | warning (_("the current case sensitivity setting does not match " |
| 354 | "the language.\n")); |
| 355 | } |
| 356 | |
| 357 | /* Set the status of range and type checking and case sensitivity based on |
| 358 | the current modes and the current language. |
| 359 | If SHOW is non-zero, then print out the current language, |
| 360 | type and range checking status. */ |
| 361 | static void |
| 362 | set_range_case (void) |
| 363 | { |
| 364 | if (range_mode == range_mode_auto) |
| 365 | range_check = current_language->la_range_check; |
| 366 | |
| 367 | if (case_mode == case_mode_auto) |
| 368 | case_sensitivity = current_language->la_case_sensitivity; |
| 369 | } |
| 370 | |
| 371 | /* Set current language to (enum language) LANG. Returns previous |
| 372 | language. */ |
| 373 | |
| 374 | enum language |
| 375 | set_language (enum language lang) |
| 376 | { |
| 377 | enum language prev_language; |
| 378 | |
| 379 | prev_language = current_language->la_language; |
| 380 | current_language = languages[lang]; |
| 381 | set_range_case (); |
| 382 | return prev_language; |
| 383 | } |
| 384 | \f |
| 385 | |
| 386 | /* Print out the current language settings: language, range and |
| 387 | type checking. If QUIETLY, print only what has changed. */ |
| 388 | |
| 389 | void |
| 390 | language_info (int quietly) |
| 391 | { |
| 392 | if (quietly && expected_language == current_language) |
| 393 | return; |
| 394 | |
| 395 | expected_language = current_language; |
| 396 | printf_unfiltered (_("Current language: %s\n"), language); |
| 397 | show_language_command (NULL, 1, NULL, NULL); |
| 398 | |
| 399 | if (!quietly) |
| 400 | { |
| 401 | printf_unfiltered (_("Range checking: %s\n"), range); |
| 402 | show_range_command (NULL, 1, NULL, NULL); |
| 403 | printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive); |
| 404 | show_case_command (NULL, 1, NULL, NULL); |
| 405 | } |
| 406 | } |
| 407 | \f |
| 408 | |
| 409 | /* Returns non-zero if the value is a pointer type. */ |
| 410 | int |
| 411 | pointer_type (struct type *type) |
| 412 | { |
| 413 | return TYPE_CODE (type) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (type); |
| 414 | } |
| 415 | |
| 416 | \f |
| 417 | /* This page contains functions that return info about |
| 418 | (struct value) values used in GDB. */ |
| 419 | |
| 420 | /* Returns non-zero if the value VAL represents a true value. */ |
| 421 | int |
| 422 | value_true (struct value *val) |
| 423 | { |
| 424 | /* It is possible that we should have some sort of error if a non-boolean |
| 425 | value is used in this context. Possibly dependent on some kind of |
| 426 | "boolean-checking" option like range checking. But it should probably |
| 427 | not depend on the language except insofar as is necessary to identify |
| 428 | a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean |
| 429 | should be an error, probably). */ |
| 430 | return !value_logical_not (val); |
| 431 | } |
| 432 | \f |
| 433 | /* This page contains functions for the printing out of |
| 434 | error messages that occur during type- and range- |
| 435 | checking. */ |
| 436 | |
| 437 | /* This is called when a language fails a range-check. The |
| 438 | first argument should be a printf()-style format string, and the |
| 439 | rest of the arguments should be its arguments. If range_check is |
| 440 | range_check_on, an error is printed; if range_check_warn, a warning; |
| 441 | otherwise just the message. */ |
| 442 | |
| 443 | void |
| 444 | range_error (const char *string,...) |
| 445 | { |
| 446 | va_list args; |
| 447 | |
| 448 | va_start (args, string); |
| 449 | switch (range_check) |
| 450 | { |
| 451 | case range_check_warn: |
| 452 | vwarning (string, args); |
| 453 | break; |
| 454 | case range_check_on: |
| 455 | verror (string, args); |
| 456 | break; |
| 457 | case range_check_off: |
| 458 | /* FIXME: cagney/2002-01-30: Should this function print anything |
| 459 | when range error is off? */ |
| 460 | vfprintf_filtered (gdb_stderr, string, args); |
| 461 | fprintf_filtered (gdb_stderr, "\n"); |
| 462 | break; |
| 463 | default: |
| 464 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 465 | } |
| 466 | va_end (args); |
| 467 | } |
| 468 | \f |
| 469 | |
| 470 | /* This page contains miscellaneous functions. */ |
| 471 | |
| 472 | /* Return the language enum for a given language string. */ |
| 473 | |
| 474 | enum language |
| 475 | language_enum (const char *str) |
| 476 | { |
| 477 | for (const auto &lang : languages) |
| 478 | if (strcmp (lang->la_name, str) == 0) |
| 479 | return lang->la_language; |
| 480 | |
| 481 | if (strcmp (str, "local") == 0) |
| 482 | return language_auto; |
| 483 | |
| 484 | return language_unknown; |
| 485 | } |
| 486 | |
| 487 | /* Return the language struct for a given language enum. */ |
| 488 | |
| 489 | const struct language_defn * |
| 490 | language_def (enum language lang) |
| 491 | { |
| 492 | return languages[lang]; |
| 493 | } |
| 494 | |
| 495 | /* Return the language as a string. */ |
| 496 | |
| 497 | const char * |
| 498 | language_str (enum language lang) |
| 499 | { |
| 500 | return languages[lang]->la_name; |
| 501 | } |
| 502 | |
| 503 | static void |
| 504 | set_check (const char *ignore, int from_tty) |
| 505 | { |
| 506 | printf_unfiltered ( |
| 507 | "\"set check\" must be followed by the name of a check subcommand.\n"); |
| 508 | help_list (setchecklist, "set check ", all_commands, gdb_stdout); |
| 509 | } |
| 510 | |
| 511 | static void |
| 512 | show_check (const char *ignore, int from_tty) |
| 513 | { |
| 514 | cmd_show_list (showchecklist, from_tty, ""); |
| 515 | } |
| 516 | \f |
| 517 | |
| 518 | /* Build and install the "set language LANG" command. */ |
| 519 | |
| 520 | static void |
| 521 | add_set_language_command () |
| 522 | { |
| 523 | static const char **language_names; |
| 524 | |
| 525 | /* Build the language names array, to be used as enumeration in the |
| 526 | "set language" enum command. +1 for "local" and +1 for NULL |
| 527 | termination. */ |
| 528 | language_names = new const char *[ARRAY_SIZE (languages) + 2]; |
| 529 | |
| 530 | /* Display "auto", "local" and "unknown" first, and then the rest, |
| 531 | alpha sorted. */ |
| 532 | const char **language_names_p = language_names; |
| 533 | *language_names_p++ = auto_language_defn.la_name; |
| 534 | *language_names_p++ = "local"; |
| 535 | *language_names_p++ = unknown_language_defn.la_name; |
| 536 | const char **sort_begin = language_names_p; |
| 537 | for (const auto &lang : languages) |
| 538 | { |
| 539 | /* Already handled above. */ |
| 540 | if (lang->la_language == language_auto |
| 541 | || lang->la_language == language_unknown) |
| 542 | continue; |
| 543 | *language_names_p++ = lang->la_name; |
| 544 | } |
| 545 | *language_names_p = NULL; |
| 546 | std::sort (sort_begin, language_names_p, compare_cstrings); |
| 547 | |
| 548 | /* Add the filename extensions. */ |
| 549 | for (const auto &lang : languages) |
| 550 | if (lang->la_filename_extensions != NULL) |
| 551 | { |
| 552 | for (size_t i = 0; lang->la_filename_extensions[i] != NULL; ++i) |
| 553 | add_filename_language (lang->la_filename_extensions[i], |
| 554 | lang->la_language); |
| 555 | } |
| 556 | |
| 557 | /* Build the "help set language" docs. */ |
| 558 | string_file doc; |
| 559 | |
| 560 | doc.printf (_("Set the current source language.\n" |
| 561 | "The currently understood settings are:\n\nlocal or " |
| 562 | "auto Automatic setting based on source file\n")); |
| 563 | |
| 564 | for (const auto &lang : languages) |
| 565 | { |
| 566 | /* Already dealt with these above. */ |
| 567 | if (lang->la_language == language_unknown |
| 568 | || lang->la_language == language_auto) |
| 569 | continue; |
| 570 | |
| 571 | /* FIXME: i18n: for now assume that the human-readable name is |
| 572 | just a capitalization of the internal name. */ |
| 573 | doc.printf ("%-16s Use the %c%s language\n", |
| 574 | lang->la_name, |
| 575 | /* Capitalize first letter of language name. */ |
| 576 | toupper (lang->la_name[0]), |
| 577 | lang->la_name + 1); |
| 578 | } |
| 579 | |
| 580 | add_setshow_enum_cmd ("language", class_support, |
| 581 | language_names, |
| 582 | &language, |
| 583 | doc.c_str (), |
| 584 | _("Show the current source language."), |
| 585 | NULL, set_language_command, |
| 586 | show_language_command, |
| 587 | &setlist, &showlist); |
| 588 | } |
| 589 | |
| 590 | /* Iterate through all registered languages looking for and calling |
| 591 | any non-NULL struct language_defn.skip_trampoline() functions. |
| 592 | Return the result from the first that returns non-zero, or 0 if all |
| 593 | `fail'. */ |
| 594 | CORE_ADDR |
| 595 | skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc) |
| 596 | { |
| 597 | for (const auto &lang : languages) |
| 598 | { |
| 599 | if (lang->skip_trampoline != NULL) |
| 600 | { |
| 601 | CORE_ADDR real_pc = lang->skip_trampoline (frame, pc); |
| 602 | |
| 603 | if (real_pc) |
| 604 | return real_pc; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | /* Return demangled language symbol, or NULL. |
| 612 | FIXME: Options are only useful for certain languages and ignored |
| 613 | by others, so it would be better to remove them here and have a |
| 614 | more flexible demangler for the languages that need it. |
| 615 | FIXME: Sometimes the demangler is invoked when we don't know the |
| 616 | language, so we can't use this everywhere. */ |
| 617 | char * |
| 618 | language_demangle (const struct language_defn *current_language, |
| 619 | const char *mangled, int options) |
| 620 | { |
| 621 | if (current_language != NULL && current_language->la_demangle) |
| 622 | return current_language->la_demangle (mangled, options); |
| 623 | return NULL; |
| 624 | } |
| 625 | |
| 626 | /* See langauge.h. */ |
| 627 | |
| 628 | int |
| 629 | language_sniff_from_mangled_name (const struct language_defn *lang, |
| 630 | const char *mangled, char **demangled) |
| 631 | { |
| 632 | gdb_assert (lang != NULL); |
| 633 | |
| 634 | if (lang->la_sniff_from_mangled_name == NULL) |
| 635 | { |
| 636 | *demangled = NULL; |
| 637 | return 0; |
| 638 | } |
| 639 | |
| 640 | return lang->la_sniff_from_mangled_name (mangled, demangled); |
| 641 | } |
| 642 | |
| 643 | /* Return class name from physname or NULL. */ |
| 644 | char * |
| 645 | language_class_name_from_physname (const struct language_defn *lang, |
| 646 | const char *physname) |
| 647 | { |
| 648 | if (lang != NULL && lang->la_class_name_from_physname) |
| 649 | return lang->la_class_name_from_physname (physname); |
| 650 | return NULL; |
| 651 | } |
| 652 | |
| 653 | /* Return non-zero if TYPE should be passed (and returned) by |
| 654 | reference at the language level. */ |
| 655 | int |
| 656 | language_pass_by_reference (struct type *type) |
| 657 | { |
| 658 | return current_language->la_pass_by_reference (type); |
| 659 | } |
| 660 | |
| 661 | /* Return zero; by default, types are passed by value at the language |
| 662 | level. The target ABI may pass or return some structs by reference |
| 663 | independent of this. */ |
| 664 | int |
| 665 | default_pass_by_reference (struct type *type) |
| 666 | { |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | /* Return the default string containing the list of characters |
| 671 | delimiting words. This is a reasonable default value that |
| 672 | most languages should be able to use. */ |
| 673 | |
| 674 | const char * |
| 675 | default_word_break_characters (void) |
| 676 | { |
| 677 | return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| 678 | } |
| 679 | |
| 680 | /* Print the index of array elements using the C99 syntax. */ |
| 681 | |
| 682 | void |
| 683 | default_print_array_index (struct value *index_value, struct ui_file *stream, |
| 684 | const struct value_print_options *options) |
| 685 | { |
| 686 | fprintf_filtered (stream, "["); |
| 687 | LA_VALUE_PRINT (index_value, stream, options); |
| 688 | fprintf_filtered (stream, "] = "); |
| 689 | } |
| 690 | |
| 691 | void |
| 692 | default_get_string (struct value *value, |
| 693 | gdb::unique_xmalloc_ptr<gdb_byte> *buffer, |
| 694 | int *length, struct type **char_type, const char **charset) |
| 695 | { |
| 696 | error (_("Getting a string is unsupported in this language.")); |
| 697 | } |
| 698 | |
| 699 | /* See language.h. */ |
| 700 | |
| 701 | bool |
| 702 | default_symbol_name_matcher (const char *symbol_search_name, |
| 703 | const lookup_name_info &lookup_name, |
| 704 | completion_match_result *comp_match_res) |
| 705 | { |
| 706 | const std::string &name = lookup_name.name (); |
| 707 | completion_match_for_lcd *match_for_lcd |
| 708 | = (comp_match_res != NULL ? &comp_match_res->match_for_lcd : NULL); |
| 709 | strncmp_iw_mode mode = (lookup_name.completion_mode () |
| 710 | ? strncmp_iw_mode::NORMAL |
| 711 | : strncmp_iw_mode::MATCH_PARAMS); |
| 712 | |
| 713 | if (strncmp_iw_with_mode (symbol_search_name, name.c_str (), name.size (), |
| 714 | mode, language_minimal, match_for_lcd) == 0) |
| 715 | { |
| 716 | if (comp_match_res != NULL) |
| 717 | comp_match_res->set_match (symbol_search_name); |
| 718 | return true; |
| 719 | } |
| 720 | else |
| 721 | return false; |
| 722 | } |
| 723 | |
| 724 | /* See language.h. */ |
| 725 | |
| 726 | symbol_name_matcher_ftype * |
| 727 | get_symbol_name_matcher (const language_defn *lang, |
| 728 | const lookup_name_info &lookup_name) |
| 729 | { |
| 730 | /* If currently in Ada mode, and the lookup name is wrapped in |
| 731 | '<...>', hijack all symbol name comparisons using the Ada |
| 732 | matcher, which handles the verbatim matching. */ |
| 733 | if (current_language->la_language == language_ada |
| 734 | && lookup_name.ada ().verbatim_p ()) |
| 735 | return current_language->la_get_symbol_name_matcher (lookup_name); |
| 736 | |
| 737 | if (lang->la_get_symbol_name_matcher != nullptr) |
| 738 | return lang->la_get_symbol_name_matcher (lookup_name); |
| 739 | return default_symbol_name_matcher; |
| 740 | } |
| 741 | |
| 742 | /* Define the language that is no language. */ |
| 743 | |
| 744 | static int |
| 745 | unk_lang_parser (struct parser_state *ps) |
| 746 | { |
| 747 | return 1; |
| 748 | } |
| 749 | |
| 750 | static void |
| 751 | unk_lang_emit_char (int c, struct type *type, struct ui_file *stream, |
| 752 | int quoter) |
| 753 | { |
| 754 | error (_("internal error - unimplemented " |
| 755 | "function unk_lang_emit_char called.")); |
| 756 | } |
| 757 | |
| 758 | static void |
| 759 | unk_lang_printchar (int c, struct type *type, struct ui_file *stream) |
| 760 | { |
| 761 | error (_("internal error - unimplemented " |
| 762 | "function unk_lang_printchar called.")); |
| 763 | } |
| 764 | |
| 765 | static void |
| 766 | unk_lang_printstr (struct ui_file *stream, struct type *type, |
| 767 | const gdb_byte *string, unsigned int length, |
| 768 | const char *encoding, int force_ellipses, |
| 769 | const struct value_print_options *options) |
| 770 | { |
| 771 | error (_("internal error - unimplemented " |
| 772 | "function unk_lang_printstr called.")); |
| 773 | } |
| 774 | |
| 775 | static void |
| 776 | unk_lang_print_type (struct type *type, const char *varstring, |
| 777 | struct ui_file *stream, int show, int level, |
| 778 | const struct type_print_options *flags) |
| 779 | { |
| 780 | error (_("internal error - unimplemented " |
| 781 | "function unk_lang_print_type called.")); |
| 782 | } |
| 783 | |
| 784 | static void |
| 785 | unk_lang_val_print (struct type *type, |
| 786 | int embedded_offset, CORE_ADDR address, |
| 787 | struct ui_file *stream, int recurse, |
| 788 | struct value *val, |
| 789 | const struct value_print_options *options) |
| 790 | { |
| 791 | error (_("internal error - unimplemented " |
| 792 | "function unk_lang_val_print called.")); |
| 793 | } |
| 794 | |
| 795 | static void |
| 796 | unk_lang_value_print (struct value *val, struct ui_file *stream, |
| 797 | const struct value_print_options *options) |
| 798 | { |
| 799 | error (_("internal error - unimplemented " |
| 800 | "function unk_lang_value_print called.")); |
| 801 | } |
| 802 | |
| 803 | static CORE_ADDR unk_lang_trampoline (struct frame_info *frame, CORE_ADDR pc) |
| 804 | { |
| 805 | return 0; |
| 806 | } |
| 807 | |
| 808 | /* Unknown languages just use the cplus demangler. */ |
| 809 | static char *unk_lang_demangle (const char *mangled, int options) |
| 810 | { |
| 811 | return gdb_demangle (mangled, options); |
| 812 | } |
| 813 | |
| 814 | static char *unk_lang_class_name (const char *mangled) |
| 815 | { |
| 816 | return NULL; |
| 817 | } |
| 818 | |
| 819 | static const struct op_print unk_op_print_tab[] = |
| 820 | { |
| 821 | {NULL, OP_NULL, PREC_NULL, 0} |
| 822 | }; |
| 823 | |
| 824 | static void |
| 825 | unknown_language_arch_info (struct gdbarch *gdbarch, |
| 826 | struct language_arch_info *lai) |
| 827 | { |
| 828 | lai->string_char_type = builtin_type (gdbarch)->builtin_char; |
| 829 | lai->bool_type_default = builtin_type (gdbarch)->builtin_int; |
| 830 | lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, 1, |
| 831 | struct type *); |
| 832 | } |
| 833 | |
| 834 | const struct language_defn unknown_language_defn = |
| 835 | { |
| 836 | "unknown", |
| 837 | "Unknown", |
| 838 | language_unknown, |
| 839 | range_check_off, |
| 840 | case_sensitive_on, |
| 841 | array_row_major, |
| 842 | macro_expansion_no, |
| 843 | NULL, |
| 844 | &exp_descriptor_standard, |
| 845 | unk_lang_parser, |
| 846 | null_post_parser, |
| 847 | unk_lang_printchar, /* Print character constant */ |
| 848 | unk_lang_printstr, |
| 849 | unk_lang_emit_char, |
| 850 | unk_lang_print_type, /* Print a type using appropriate syntax */ |
| 851 | default_print_typedef, /* Print a typedef using appropriate syntax */ |
| 852 | unk_lang_val_print, /* Print a value using appropriate syntax */ |
| 853 | unk_lang_value_print, /* Print a top-level value */ |
| 854 | default_read_var_value, /* la_read_var_value */ |
| 855 | unk_lang_trampoline, /* Language specific skip_trampoline */ |
| 856 | "this", /* name_of_this */ |
| 857 | true, /* store_sym_names_in_linkage_form_p */ |
| 858 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 859 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 860 | unk_lang_demangle, /* Language specific symbol demangler */ |
| 861 | NULL, |
| 862 | unk_lang_class_name, /* Language specific |
| 863 | class_name_from_physname */ |
| 864 | unk_op_print_tab, /* expression operators for printing */ |
| 865 | 1, /* c-style arrays */ |
| 866 | 0, /* String lower bound */ |
| 867 | default_word_break_characters, |
| 868 | default_collect_symbol_completion_matches, |
| 869 | unknown_language_arch_info, /* la_language_arch_info. */ |
| 870 | default_print_array_index, |
| 871 | default_pass_by_reference, |
| 872 | default_get_string, |
| 873 | c_watch_location_expression, |
| 874 | NULL, /* la_get_symbol_name_matcher */ |
| 875 | iterate_over_symbols, |
| 876 | default_search_name_hash, |
| 877 | &default_varobj_ops, |
| 878 | NULL, |
| 879 | NULL, |
| 880 | LANG_MAGIC |
| 881 | }; |
| 882 | |
| 883 | /* These two structs define fake entries for the "local" and "auto" |
| 884 | options. */ |
| 885 | const struct language_defn auto_language_defn = |
| 886 | { |
| 887 | "auto", |
| 888 | "Auto", |
| 889 | language_auto, |
| 890 | range_check_off, |
| 891 | case_sensitive_on, |
| 892 | array_row_major, |
| 893 | macro_expansion_no, |
| 894 | NULL, |
| 895 | &exp_descriptor_standard, |
| 896 | unk_lang_parser, |
| 897 | null_post_parser, |
| 898 | unk_lang_printchar, /* Print character constant */ |
| 899 | unk_lang_printstr, |
| 900 | unk_lang_emit_char, |
| 901 | unk_lang_print_type, /* Print a type using appropriate syntax */ |
| 902 | default_print_typedef, /* Print a typedef using appropriate syntax */ |
| 903 | unk_lang_val_print, /* Print a value using appropriate syntax */ |
| 904 | unk_lang_value_print, /* Print a top-level value */ |
| 905 | default_read_var_value, /* la_read_var_value */ |
| 906 | unk_lang_trampoline, /* Language specific skip_trampoline */ |
| 907 | "this", /* name_of_this */ |
| 908 | false, /* store_sym_names_in_linkage_form_p */ |
| 909 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 910 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 911 | unk_lang_demangle, /* Language specific symbol demangler */ |
| 912 | NULL, |
| 913 | unk_lang_class_name, /* Language specific |
| 914 | class_name_from_physname */ |
| 915 | unk_op_print_tab, /* expression operators for printing */ |
| 916 | 1, /* c-style arrays */ |
| 917 | 0, /* String lower bound */ |
| 918 | default_word_break_characters, |
| 919 | default_collect_symbol_completion_matches, |
| 920 | unknown_language_arch_info, /* la_language_arch_info. */ |
| 921 | default_print_array_index, |
| 922 | default_pass_by_reference, |
| 923 | default_get_string, |
| 924 | c_watch_location_expression, |
| 925 | NULL, /* la_get_symbol_name_matcher */ |
| 926 | iterate_over_symbols, |
| 927 | default_search_name_hash, |
| 928 | &default_varobj_ops, |
| 929 | NULL, |
| 930 | NULL, |
| 931 | LANG_MAGIC |
| 932 | }; |
| 933 | |
| 934 | \f |
| 935 | /* Per-architecture language information. */ |
| 936 | |
| 937 | static struct gdbarch_data *language_gdbarch_data; |
| 938 | |
| 939 | struct language_gdbarch |
| 940 | { |
| 941 | /* A vector of per-language per-architecture info. Indexed by "enum |
| 942 | language". */ |
| 943 | struct language_arch_info arch_info[nr_languages]; |
| 944 | }; |
| 945 | |
| 946 | static void * |
| 947 | language_gdbarch_post_init (struct gdbarch *gdbarch) |
| 948 | { |
| 949 | struct language_gdbarch *l; |
| 950 | |
| 951 | l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch); |
| 952 | for (const auto &lang : languages) |
| 953 | if (lang != NULL && lang->la_language_arch_info != NULL) |
| 954 | { |
| 955 | lang->la_language_arch_info (gdbarch, |
| 956 | l->arch_info + lang->la_language); |
| 957 | } |
| 958 | |
| 959 | return l; |
| 960 | } |
| 961 | |
| 962 | struct type * |
| 963 | language_string_char_type (const struct language_defn *la, |
| 964 | struct gdbarch *gdbarch) |
| 965 | { |
| 966 | struct language_gdbarch *ld |
| 967 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 968 | |
| 969 | return ld->arch_info[la->la_language].string_char_type; |
| 970 | } |
| 971 | |
| 972 | struct type * |
| 973 | language_bool_type (const struct language_defn *la, |
| 974 | struct gdbarch *gdbarch) |
| 975 | { |
| 976 | struct language_gdbarch *ld |
| 977 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 978 | |
| 979 | if (ld->arch_info[la->la_language].bool_type_symbol) |
| 980 | { |
| 981 | struct symbol *sym; |
| 982 | |
| 983 | sym = lookup_symbol (ld->arch_info[la->la_language].bool_type_symbol, |
| 984 | NULL, VAR_DOMAIN, NULL).symbol; |
| 985 | if (sym) |
| 986 | { |
| 987 | struct type *type = SYMBOL_TYPE (sym); |
| 988 | |
| 989 | if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) |
| 990 | return type; |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | return ld->arch_info[la->la_language].bool_type_default; |
| 995 | } |
| 996 | |
| 997 | /* Helper function for primitive type lookup. */ |
| 998 | |
| 999 | static struct type ** |
| 1000 | language_lookup_primitive_type_1 (const struct language_arch_info *lai, |
| 1001 | const char *name) |
| 1002 | { |
| 1003 | struct type **p; |
| 1004 | |
| 1005 | for (p = lai->primitive_type_vector; (*p) != NULL; p++) |
| 1006 | { |
| 1007 | if (strcmp (TYPE_NAME (*p), name) == 0) |
| 1008 | return p; |
| 1009 | } |
| 1010 | return NULL; |
| 1011 | } |
| 1012 | |
| 1013 | /* See language.h. */ |
| 1014 | |
| 1015 | struct type * |
| 1016 | language_lookup_primitive_type (const struct language_defn *la, |
| 1017 | struct gdbarch *gdbarch, |
| 1018 | const char *name) |
| 1019 | { |
| 1020 | struct language_gdbarch *ld = |
| 1021 | (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 1022 | struct type **typep; |
| 1023 | |
| 1024 | typep = language_lookup_primitive_type_1 (&ld->arch_info[la->la_language], |
| 1025 | name); |
| 1026 | if (typep == NULL) |
| 1027 | return NULL; |
| 1028 | return *typep; |
| 1029 | } |
| 1030 | |
| 1031 | /* Helper function for type lookup as a symbol. |
| 1032 | Create the symbol corresponding to type TYPE in language LANG. */ |
| 1033 | |
| 1034 | static struct symbol * |
| 1035 | language_alloc_type_symbol (enum language lang, struct type *type) |
| 1036 | { |
| 1037 | struct symbol *symbol; |
| 1038 | struct gdbarch *gdbarch; |
| 1039 | |
| 1040 | gdb_assert (!TYPE_OBJFILE_OWNED (type)); |
| 1041 | |
| 1042 | gdbarch = TYPE_OWNER (type).gdbarch; |
| 1043 | symbol = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct symbol); |
| 1044 | |
| 1045 | symbol->ginfo.name = TYPE_NAME (type); |
| 1046 | symbol->ginfo.language = lang; |
| 1047 | symbol->owner.arch = gdbarch; |
| 1048 | SYMBOL_OBJFILE_OWNED (symbol) = 0; |
| 1049 | SYMBOL_TYPE (symbol) = type; |
| 1050 | SYMBOL_DOMAIN (symbol) = VAR_DOMAIN; |
| 1051 | SYMBOL_ACLASS_INDEX (symbol) = LOC_TYPEDEF; |
| 1052 | |
| 1053 | return symbol; |
| 1054 | } |
| 1055 | |
| 1056 | /* Initialize the primitive type symbols of language LD. |
| 1057 | The primitive type vector must have already been initialized. */ |
| 1058 | |
| 1059 | static void |
| 1060 | language_init_primitive_type_symbols (struct language_arch_info *lai, |
| 1061 | const struct language_defn *la, |
| 1062 | struct gdbarch *gdbarch) |
| 1063 | { |
| 1064 | int n; |
| 1065 | |
| 1066 | gdb_assert (lai->primitive_type_vector != NULL); |
| 1067 | |
| 1068 | for (n = 0; lai->primitive_type_vector[n] != NULL; ++n) |
| 1069 | continue; |
| 1070 | |
| 1071 | lai->primitive_type_symbols |
| 1072 | = GDBARCH_OBSTACK_CALLOC (gdbarch, n + 1, struct symbol *); |
| 1073 | |
| 1074 | for (n = 0; lai->primitive_type_vector[n] != NULL; ++n) |
| 1075 | { |
| 1076 | lai->primitive_type_symbols[n] |
| 1077 | = language_alloc_type_symbol (la->la_language, |
| 1078 | lai->primitive_type_vector[n]); |
| 1079 | } |
| 1080 | |
| 1081 | /* Note: The result of symbol lookup is normally a symbol *and* the block |
| 1082 | it was found in. Builtin types don't live in blocks. We *could* give |
| 1083 | them one, but there is no current need so to keep things simple symbol |
| 1084 | lookup is extended to allow for BLOCK_FOUND to be NULL. */ |
| 1085 | } |
| 1086 | |
| 1087 | /* See language.h. */ |
| 1088 | |
| 1089 | struct symbol * |
| 1090 | language_lookup_primitive_type_as_symbol (const struct language_defn *la, |
| 1091 | struct gdbarch *gdbarch, |
| 1092 | const char *name) |
| 1093 | { |
| 1094 | struct language_gdbarch *ld |
| 1095 | = (struct language_gdbarch *) gdbarch_data (gdbarch, language_gdbarch_data); |
| 1096 | struct language_arch_info *lai = &ld->arch_info[la->la_language]; |
| 1097 | struct type **typep; |
| 1098 | struct symbol *sym; |
| 1099 | |
| 1100 | if (symbol_lookup_debug) |
| 1101 | { |
| 1102 | fprintf_unfiltered (gdb_stdlog, |
| 1103 | "language_lookup_primitive_type_as_symbol" |
| 1104 | " (%s, %s, %s)", |
| 1105 | la->la_name, host_address_to_string (gdbarch), name); |
| 1106 | } |
| 1107 | |
| 1108 | typep = language_lookup_primitive_type_1 (lai, name); |
| 1109 | if (typep == NULL) |
| 1110 | { |
| 1111 | if (symbol_lookup_debug) |
| 1112 | fprintf_unfiltered (gdb_stdlog, " = NULL\n"); |
| 1113 | return NULL; |
| 1114 | } |
| 1115 | |
| 1116 | /* The set of symbols is lazily initialized. */ |
| 1117 | if (lai->primitive_type_symbols == NULL) |
| 1118 | language_init_primitive_type_symbols (lai, la, gdbarch); |
| 1119 | |
| 1120 | sym = lai->primitive_type_symbols[typep - lai->primitive_type_vector]; |
| 1121 | |
| 1122 | if (symbol_lookup_debug) |
| 1123 | fprintf_unfiltered (gdb_stdlog, " = %s\n", host_address_to_string (sym)); |
| 1124 | return sym; |
| 1125 | } |
| 1126 | |
| 1127 | /* Initialize the language routines. */ |
| 1128 | |
| 1129 | void |
| 1130 | _initialize_language (void) |
| 1131 | { |
| 1132 | static const char *const type_or_range_names[] |
| 1133 | = { "on", "off", "warn", "auto", NULL }; |
| 1134 | |
| 1135 | static const char *const case_sensitive_names[] |
| 1136 | = { "on", "off", "auto", NULL }; |
| 1137 | |
| 1138 | language_gdbarch_data |
| 1139 | = gdbarch_data_register_post_init (language_gdbarch_post_init); |
| 1140 | |
| 1141 | /* GDB commands for language specific stuff. */ |
| 1142 | |
| 1143 | add_prefix_cmd ("check", no_class, set_check, |
| 1144 | _("Set the status of the type/range checker."), |
| 1145 | &setchecklist, "set check ", 0, &setlist); |
| 1146 | add_alias_cmd ("c", "check", no_class, 1, &setlist); |
| 1147 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); |
| 1148 | |
| 1149 | add_prefix_cmd ("check", no_class, show_check, |
| 1150 | _("Show the status of the type/range checker."), |
| 1151 | &showchecklist, "show check ", 0, &showlist); |
| 1152 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
| 1153 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); |
| 1154 | |
| 1155 | add_setshow_enum_cmd ("range", class_support, type_or_range_names, |
| 1156 | &range, |
| 1157 | _("Set range checking. (on/warn/off/auto)"), |
| 1158 | _("Show range checking. (on/warn/off/auto)"), |
| 1159 | NULL, set_range_command, |
| 1160 | show_range_command, |
| 1161 | &setchecklist, &showchecklist); |
| 1162 | |
| 1163 | add_setshow_enum_cmd ("case-sensitive", class_support, case_sensitive_names, |
| 1164 | &case_sensitive, _("\ |
| 1165 | Set case sensitivity in name search. (on/off/auto)"), _("\ |
| 1166 | Show case sensitivity in name search. (on/off/auto)"), _("\ |
| 1167 | For Fortran the default is off; for other languages the default is on."), |
| 1168 | set_case_command, |
| 1169 | show_case_command, |
| 1170 | &setlist, &showlist); |
| 1171 | |
| 1172 | add_set_language_command (); |
| 1173 | |
| 1174 | language = "auto"; |
| 1175 | range = "auto"; |
| 1176 | case_sensitive = "auto"; |
| 1177 | |
| 1178 | /* Have the above take effect. */ |
| 1179 | set_language (language_auto); |
| 1180 | } |