| 1 | /* Multiple source language support for GDB. |
| 2 | |
| 3 | Copyright (C) 1991-2015 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 "jv-lang.h" |
| 43 | #include "demangle.h" |
| 44 | #include "symfile.h" |
| 45 | #include "cp-support.h" |
| 46 | |
| 47 | extern void _initialize_language (void); |
| 48 | |
| 49 | static void unk_lang_error (char *); |
| 50 | |
| 51 | static int unk_lang_parser (struct parser_state *); |
| 52 | |
| 53 | static void show_check (char *, int); |
| 54 | |
| 55 | static void set_check (char *, int); |
| 56 | |
| 57 | static void set_range_case (void); |
| 58 | |
| 59 | static void unk_lang_emit_char (int c, struct type *type, |
| 60 | struct ui_file *stream, int quoter); |
| 61 | |
| 62 | static void unk_lang_printchar (int c, struct type *type, |
| 63 | struct ui_file *stream); |
| 64 | |
| 65 | static void unk_lang_value_print (struct value *, struct ui_file *, |
| 66 | const struct value_print_options *); |
| 67 | |
| 68 | static CORE_ADDR unk_lang_trampoline (struct frame_info *, CORE_ADDR pc); |
| 69 | |
| 70 | /* Forward declaration */ |
| 71 | extern const struct language_defn unknown_language_defn; |
| 72 | |
| 73 | /* The current (default at startup) state of type and range checking. |
| 74 | (If the modes are set to "auto", though, these are changed based |
| 75 | on the default language at startup, and then again based on the |
| 76 | language of the first source file. */ |
| 77 | |
| 78 | enum range_mode range_mode = range_mode_auto; |
| 79 | enum range_check range_check = range_check_off; |
| 80 | enum case_mode case_mode = case_mode_auto; |
| 81 | enum case_sensitivity case_sensitivity = case_sensitive_on; |
| 82 | |
| 83 | /* The current language and language_mode (see language.h). */ |
| 84 | |
| 85 | const struct language_defn *current_language = &unknown_language_defn; |
| 86 | enum language_mode language_mode = language_mode_auto; |
| 87 | |
| 88 | /* The language that the user expects to be typing in (the language |
| 89 | of main(), or the last language we notified them about, or C). */ |
| 90 | |
| 91 | const struct language_defn *expected_language; |
| 92 | |
| 93 | /* The list of supported languages. The list itself is malloc'd. */ |
| 94 | |
| 95 | static const struct language_defn **languages; |
| 96 | static unsigned languages_size; |
| 97 | static unsigned languages_allocsize; |
| 98 | #define DEFAULT_ALLOCSIZE 4 |
| 99 | |
| 100 | /* The current values of the "set language/type/range" enum |
| 101 | commands. */ |
| 102 | static const char *language; |
| 103 | static const char *type; |
| 104 | static const char *range; |
| 105 | static const char *case_sensitive; |
| 106 | |
| 107 | /* Warning issued when current_language and the language of the current |
| 108 | frame do not match. */ |
| 109 | char lang_frame_mismatch_warn[] = |
| 110 | "Warning: the current language does not match this frame."; |
| 111 | \f |
| 112 | /* This page contains the functions corresponding to GDB commands |
| 113 | and their helpers. */ |
| 114 | |
| 115 | /* Show command. Display a warning if the language set |
| 116 | does not match the frame. */ |
| 117 | static void |
| 118 | show_language_command (struct ui_file *file, int from_tty, |
| 119 | struct cmd_list_element *c, const char *value) |
| 120 | { |
| 121 | enum language flang; /* The language of the current frame. */ |
| 122 | |
| 123 | if (language_mode == language_mode_auto) |
| 124 | fprintf_filtered (gdb_stdout, |
| 125 | _("The current source language is " |
| 126 | "\"auto; currently %s\".\n"), |
| 127 | current_language->la_name); |
| 128 | else |
| 129 | fprintf_filtered (gdb_stdout, |
| 130 | _("The current source language is \"%s\".\n"), |
| 131 | current_language->la_name); |
| 132 | |
| 133 | flang = get_frame_language (); |
| 134 | if (flang != language_unknown && |
| 135 | language_mode == language_mode_manual && |
| 136 | current_language->la_language != flang) |
| 137 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 138 | } |
| 139 | |
| 140 | /* Set command. Change the current working language. */ |
| 141 | static void |
| 142 | set_language_command (char *ignore, int from_tty, struct cmd_list_element *c) |
| 143 | { |
| 144 | int i; |
| 145 | enum language flang; |
| 146 | |
| 147 | /* Search the list of languages for a match. */ |
| 148 | for (i = 0; i < languages_size; i++) |
| 149 | { |
| 150 | if (strcmp (languages[i]->la_name, language) == 0) |
| 151 | { |
| 152 | /* Found it! Go into manual mode, and use this language. */ |
| 153 | if (languages[i]->la_language == language_auto) |
| 154 | { |
| 155 | /* Enter auto mode. Set to the current frame's language, if |
| 156 | known, or fallback to the initial language. */ |
| 157 | language_mode = language_mode_auto; |
| 158 | flang = get_frame_language (); |
| 159 | if (flang != language_unknown) |
| 160 | set_language (flang); |
| 161 | else |
| 162 | set_initial_language (); |
| 163 | expected_language = current_language; |
| 164 | return; |
| 165 | } |
| 166 | else |
| 167 | { |
| 168 | /* Enter manual mode. Set the specified language. */ |
| 169 | language_mode = language_mode_manual; |
| 170 | current_language = languages[i]; |
| 171 | set_range_case (); |
| 172 | expected_language = current_language; |
| 173 | return; |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | internal_error (__FILE__, __LINE__, |
| 179 | "Couldn't find language `%s' in known languages list.", |
| 180 | language); |
| 181 | } |
| 182 | |
| 183 | /* Show command. Display a warning if the range setting does |
| 184 | not match the current language. */ |
| 185 | static void |
| 186 | show_range_command (struct ui_file *file, int from_tty, |
| 187 | struct cmd_list_element *c, const char *value) |
| 188 | { |
| 189 | if (range_mode == range_mode_auto) |
| 190 | { |
| 191 | char *tmp; |
| 192 | |
| 193 | switch (range_check) |
| 194 | { |
| 195 | case range_check_on: |
| 196 | tmp = "on"; |
| 197 | break; |
| 198 | case range_check_off: |
| 199 | tmp = "off"; |
| 200 | break; |
| 201 | case range_check_warn: |
| 202 | tmp = "warn"; |
| 203 | break; |
| 204 | default: |
| 205 | internal_error (__FILE__, __LINE__, |
| 206 | "Unrecognized range check setting."); |
| 207 | } |
| 208 | |
| 209 | fprintf_filtered (gdb_stdout, |
| 210 | _("Range checking is \"auto; currently %s\".\n"), |
| 211 | tmp); |
| 212 | } |
| 213 | else |
| 214 | fprintf_filtered (gdb_stdout, _("Range checking is \"%s\".\n"), |
| 215 | value); |
| 216 | |
| 217 | if (range_check != current_language->la_range_check) |
| 218 | warning (_("the current range check setting " |
| 219 | "does not match the language.\n")); |
| 220 | } |
| 221 | |
| 222 | /* Set command. Change the setting for range checking. */ |
| 223 | static void |
| 224 | set_range_command (char *ignore, int from_tty, struct cmd_list_element *c) |
| 225 | { |
| 226 | if (strcmp (range, "on") == 0) |
| 227 | { |
| 228 | range_check = range_check_on; |
| 229 | range_mode = range_mode_manual; |
| 230 | } |
| 231 | else if (strcmp (range, "warn") == 0) |
| 232 | { |
| 233 | range_check = range_check_warn; |
| 234 | range_mode = range_mode_manual; |
| 235 | } |
| 236 | else if (strcmp (range, "off") == 0) |
| 237 | { |
| 238 | range_check = range_check_off; |
| 239 | range_mode = range_mode_manual; |
| 240 | } |
| 241 | else if (strcmp (range, "auto") == 0) |
| 242 | { |
| 243 | range_mode = range_mode_auto; |
| 244 | set_range_case (); |
| 245 | return; |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | internal_error (__FILE__, __LINE__, |
| 250 | _("Unrecognized range check setting: \"%s\""), range); |
| 251 | } |
| 252 | if (range_check != current_language->la_range_check) |
| 253 | warning (_("the current range check setting " |
| 254 | "does not match the language.\n")); |
| 255 | } |
| 256 | |
| 257 | /* Show command. Display a warning if the case sensitivity setting does |
| 258 | not match the current language. */ |
| 259 | static void |
| 260 | show_case_command (struct ui_file *file, int from_tty, |
| 261 | struct cmd_list_element *c, const char *value) |
| 262 | { |
| 263 | if (case_mode == case_mode_auto) |
| 264 | { |
| 265 | char *tmp = NULL; |
| 266 | |
| 267 | switch (case_sensitivity) |
| 268 | { |
| 269 | case case_sensitive_on: |
| 270 | tmp = "on"; |
| 271 | break; |
| 272 | case case_sensitive_off: |
| 273 | tmp = "off"; |
| 274 | break; |
| 275 | default: |
| 276 | internal_error (__FILE__, __LINE__, |
| 277 | "Unrecognized case-sensitive setting."); |
| 278 | } |
| 279 | |
| 280 | fprintf_filtered (gdb_stdout, |
| 281 | _("Case sensitivity in " |
| 282 | "name search is \"auto; currently %s\".\n"), |
| 283 | tmp); |
| 284 | } |
| 285 | else |
| 286 | fprintf_filtered (gdb_stdout, |
| 287 | _("Case sensitivity in name search is \"%s\".\n"), |
| 288 | value); |
| 289 | |
| 290 | if (case_sensitivity != current_language->la_case_sensitivity) |
| 291 | warning (_("the current case sensitivity setting does not match " |
| 292 | "the language.\n")); |
| 293 | } |
| 294 | |
| 295 | /* Set command. Change the setting for case sensitivity. */ |
| 296 | |
| 297 | static void |
| 298 | set_case_command (char *ignore, int from_tty, struct cmd_list_element *c) |
| 299 | { |
| 300 | if (strcmp (case_sensitive, "on") == 0) |
| 301 | { |
| 302 | case_sensitivity = case_sensitive_on; |
| 303 | case_mode = case_mode_manual; |
| 304 | } |
| 305 | else if (strcmp (case_sensitive, "off") == 0) |
| 306 | { |
| 307 | case_sensitivity = case_sensitive_off; |
| 308 | case_mode = case_mode_manual; |
| 309 | } |
| 310 | else if (strcmp (case_sensitive, "auto") == 0) |
| 311 | { |
| 312 | case_mode = case_mode_auto; |
| 313 | set_range_case (); |
| 314 | return; |
| 315 | } |
| 316 | else |
| 317 | { |
| 318 | internal_error (__FILE__, __LINE__, |
| 319 | "Unrecognized case-sensitive setting: \"%s\"", |
| 320 | case_sensitive); |
| 321 | } |
| 322 | |
| 323 | if (case_sensitivity != current_language->la_case_sensitivity) |
| 324 | warning (_("the current case sensitivity setting does not match " |
| 325 | "the language.\n")); |
| 326 | } |
| 327 | |
| 328 | /* Set the status of range and type checking and case sensitivity based on |
| 329 | the current modes and the current language. |
| 330 | If SHOW is non-zero, then print out the current language, |
| 331 | type and range checking status. */ |
| 332 | static void |
| 333 | set_range_case (void) |
| 334 | { |
| 335 | if (range_mode == range_mode_auto) |
| 336 | range_check = current_language->la_range_check; |
| 337 | |
| 338 | if (case_mode == case_mode_auto) |
| 339 | case_sensitivity = current_language->la_case_sensitivity; |
| 340 | } |
| 341 | |
| 342 | /* Set current language to (enum language) LANG. Returns previous |
| 343 | language. */ |
| 344 | |
| 345 | enum language |
| 346 | set_language (enum language lang) |
| 347 | { |
| 348 | int i; |
| 349 | enum language prev_language; |
| 350 | |
| 351 | prev_language = current_language->la_language; |
| 352 | |
| 353 | for (i = 0; i < languages_size; i++) |
| 354 | { |
| 355 | if (languages[i]->la_language == lang) |
| 356 | { |
| 357 | current_language = languages[i]; |
| 358 | set_range_case (); |
| 359 | break; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | return prev_language; |
| 364 | } |
| 365 | \f |
| 366 | |
| 367 | /* Print out the current language settings: language, range and |
| 368 | type checking. If QUIETLY, print only what has changed. */ |
| 369 | |
| 370 | void |
| 371 | language_info (int quietly) |
| 372 | { |
| 373 | if (quietly && expected_language == current_language) |
| 374 | return; |
| 375 | |
| 376 | expected_language = current_language; |
| 377 | printf_unfiltered (_("Current language: %s\n"), language); |
| 378 | show_language_command (NULL, 1, NULL, NULL); |
| 379 | |
| 380 | if (!quietly) |
| 381 | { |
| 382 | printf_unfiltered (_("Range checking: %s\n"), range); |
| 383 | show_range_command (NULL, 1, NULL, NULL); |
| 384 | printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive); |
| 385 | show_case_command (NULL, 1, NULL, NULL); |
| 386 | } |
| 387 | } |
| 388 | \f |
| 389 | |
| 390 | /* Returns non-zero if the value is a pointer type. */ |
| 391 | int |
| 392 | pointer_type (struct type *type) |
| 393 | { |
| 394 | return TYPE_CODE (type) == TYPE_CODE_PTR || |
| 395 | TYPE_CODE (type) == TYPE_CODE_REF; |
| 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 (char *str) |
| 458 | { |
| 459 | int i; |
| 460 | |
| 461 | for (i = 0; i < languages_size; i++) |
| 462 | if (strcmp (languages[i]->la_name, str) == 0) |
| 463 | return languages[i]->la_language; |
| 464 | |
| 465 | return language_unknown; |
| 466 | } |
| 467 | |
| 468 | /* Return the language struct for a given language enum. */ |
| 469 | |
| 470 | const struct language_defn * |
| 471 | language_def (enum language lang) |
| 472 | { |
| 473 | int i; |
| 474 | |
| 475 | for (i = 0; i < languages_size; i++) |
| 476 | { |
| 477 | if (languages[i]->la_language == lang) |
| 478 | { |
| 479 | return languages[i]; |
| 480 | } |
| 481 | } |
| 482 | return NULL; |
| 483 | } |
| 484 | |
| 485 | /* Return the language as a string. */ |
| 486 | const char * |
| 487 | language_str (enum language lang) |
| 488 | { |
| 489 | int i; |
| 490 | |
| 491 | for (i = 0; i < languages_size; i++) |
| 492 | { |
| 493 | if (languages[i]->la_language == lang) |
| 494 | { |
| 495 | return languages[i]->la_name; |
| 496 | } |
| 497 | } |
| 498 | return "Unknown"; |
| 499 | } |
| 500 | |
| 501 | static void |
| 502 | set_check (char *ignore, int from_tty) |
| 503 | { |
| 504 | printf_unfiltered ( |
| 505 | "\"set check\" must be followed by the name of a check subcommand.\n"); |
| 506 | help_list (setchecklist, "set check ", all_commands, gdb_stdout); |
| 507 | } |
| 508 | |
| 509 | static void |
| 510 | show_check (char *ignore, int from_tty) |
| 511 | { |
| 512 | cmd_show_list (showchecklist, from_tty, ""); |
| 513 | } |
| 514 | \f |
| 515 | /* Add a language to the set of known languages. */ |
| 516 | |
| 517 | void |
| 518 | add_language (const struct language_defn *lang) |
| 519 | { |
| 520 | /* For the "set language" command. */ |
| 521 | static const char **language_names = NULL; |
| 522 | /* For the "help set language" command. */ |
| 523 | char *language_set_doc = NULL; |
| 524 | |
| 525 | int i; |
| 526 | struct ui_file *tmp_stream; |
| 527 | |
| 528 | if (lang->la_magic != LANG_MAGIC) |
| 529 | { |
| 530 | fprintf_unfiltered (gdb_stderr, |
| 531 | "Magic number of %s language struct wrong\n", |
| 532 | lang->la_name); |
| 533 | internal_error (__FILE__, __LINE__, |
| 534 | _("failed internal consistency check")); |
| 535 | } |
| 536 | |
| 537 | if (!languages) |
| 538 | { |
| 539 | languages_allocsize = DEFAULT_ALLOCSIZE; |
| 540 | languages = (const struct language_defn **) xmalloc |
| 541 | (languages_allocsize * sizeof (*languages)); |
| 542 | } |
| 543 | if (languages_size >= languages_allocsize) |
| 544 | { |
| 545 | languages_allocsize *= 2; |
| 546 | languages = (const struct language_defn **) xrealloc ((char *) languages, |
| 547 | languages_allocsize * sizeof (*languages)); |
| 548 | } |
| 549 | languages[languages_size++] = lang; |
| 550 | |
| 551 | /* Build the language names array, to be used as enumeration in the |
| 552 | set language" enum command. */ |
| 553 | language_names = xrealloc (language_names, |
| 554 | (languages_size + 1) * sizeof (const char *)); |
| 555 | for (i = 0; i < languages_size; ++i) |
| 556 | language_names[i] = languages[i]->la_name; |
| 557 | language_names[i] = NULL; |
| 558 | |
| 559 | /* Build the "help set language" docs. */ |
| 560 | tmp_stream = mem_fileopen (); |
| 561 | |
| 562 | fprintf_unfiltered (tmp_stream, |
| 563 | _("Set the current source language.\n" |
| 564 | "The currently understood settings are:\n\nlocal or " |
| 565 | "auto Automatic setting based on source file\n")); |
| 566 | |
| 567 | for (i = 0; i < languages_size; ++i) |
| 568 | { |
| 569 | /* Already dealt with these above. */ |
| 570 | if (languages[i]->la_language == language_unknown |
| 571 | || languages[i]->la_language == language_auto) |
| 572 | continue; |
| 573 | |
| 574 | /* FIXME: i18n: for now assume that the human-readable name |
| 575 | is just a capitalization of the internal name. */ |
| 576 | fprintf_unfiltered (tmp_stream, "%-16s Use the %c%s language\n", |
| 577 | languages[i]->la_name, |
| 578 | /* Capitalize first letter of language |
| 579 | name. */ |
| 580 | toupper (languages[i]->la_name[0]), |
| 581 | languages[i]->la_name + 1); |
| 582 | } |
| 583 | |
| 584 | language_set_doc = ui_file_xstrdup (tmp_stream, NULL); |
| 585 | ui_file_delete (tmp_stream); |
| 586 | |
| 587 | add_setshow_enum_cmd ("language", class_support, |
| 588 | (const char **) language_names, |
| 589 | &language, |
| 590 | language_set_doc, |
| 591 | _("Show the current source language."), |
| 592 | NULL, set_language_command, |
| 593 | show_language_command, |
| 594 | &setlist, &showlist); |
| 595 | |
| 596 | xfree (language_set_doc); |
| 597 | } |
| 598 | |
| 599 | /* Iterate through all registered languages looking for and calling |
| 600 | any non-NULL struct language_defn.skip_trampoline() functions. |
| 601 | Return the result from the first that returns non-zero, or 0 if all |
| 602 | `fail'. */ |
| 603 | CORE_ADDR |
| 604 | skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc) |
| 605 | { |
| 606 | int i; |
| 607 | |
| 608 | for (i = 0; i < languages_size; i++) |
| 609 | { |
| 610 | if (languages[i]->skip_trampoline) |
| 611 | { |
| 612 | CORE_ADDR real_pc = (languages[i]->skip_trampoline) (frame, pc); |
| 613 | |
| 614 | if (real_pc) |
| 615 | return real_pc; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | /* Return demangled language symbol, or NULL. |
| 623 | FIXME: Options are only useful for certain languages and ignored |
| 624 | by others, so it would be better to remove them here and have a |
| 625 | more flexible demangler for the languages that need it. |
| 626 | FIXME: Sometimes the demangler is invoked when we don't know the |
| 627 | language, so we can't use this everywhere. */ |
| 628 | char * |
| 629 | language_demangle (const struct language_defn *current_language, |
| 630 | const char *mangled, int options) |
| 631 | { |
| 632 | if (current_language != NULL && current_language->la_demangle) |
| 633 | return current_language->la_demangle (mangled, options); |
| 634 | return NULL; |
| 635 | } |
| 636 | |
| 637 | /* Return class name from physname or NULL. */ |
| 638 | char * |
| 639 | language_class_name_from_physname (const struct language_defn *lang, |
| 640 | const char *physname) |
| 641 | { |
| 642 | if (lang != NULL && lang->la_class_name_from_physname) |
| 643 | return lang->la_class_name_from_physname (physname); |
| 644 | return NULL; |
| 645 | } |
| 646 | |
| 647 | /* Return non-zero if TYPE should be passed (and returned) by |
| 648 | reference at the language level. */ |
| 649 | int |
| 650 | language_pass_by_reference (struct type *type) |
| 651 | { |
| 652 | return current_language->la_pass_by_reference (type); |
| 653 | } |
| 654 | |
| 655 | /* Return zero; by default, types are passed by value at the language |
| 656 | level. The target ABI may pass or return some structs by reference |
| 657 | independent of this. */ |
| 658 | int |
| 659 | default_pass_by_reference (struct type *type) |
| 660 | { |
| 661 | return 0; |
| 662 | } |
| 663 | |
| 664 | /* Return the default string containing the list of characters |
| 665 | delimiting words. This is a reasonable default value that |
| 666 | most languages should be able to use. */ |
| 667 | |
| 668 | char * |
| 669 | default_word_break_characters (void) |
| 670 | { |
| 671 | return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| 672 | } |
| 673 | |
| 674 | /* Print the index of array elements using the C99 syntax. */ |
| 675 | |
| 676 | void |
| 677 | default_print_array_index (struct value *index_value, struct ui_file *stream, |
| 678 | const struct value_print_options *options) |
| 679 | { |
| 680 | fprintf_filtered (stream, "["); |
| 681 | LA_VALUE_PRINT (index_value, stream, options); |
| 682 | fprintf_filtered (stream, "] = "); |
| 683 | } |
| 684 | |
| 685 | void |
| 686 | default_get_string (struct value *value, gdb_byte **buffer, int *length, |
| 687 | struct type **char_type, const char **charset) |
| 688 | { |
| 689 | error (_("Getting a string is unsupported in this language.")); |
| 690 | } |
| 691 | |
| 692 | /* Define the language that is no language. */ |
| 693 | |
| 694 | static int |
| 695 | unk_lang_parser (struct parser_state *ps) |
| 696 | { |
| 697 | return 1; |
| 698 | } |
| 699 | |
| 700 | static void |
| 701 | unk_lang_error (char *msg) |
| 702 | { |
| 703 | error (_("Attempted to parse an expression with unknown language")); |
| 704 | } |
| 705 | |
| 706 | static void |
| 707 | unk_lang_emit_char (int c, struct type *type, struct ui_file *stream, |
| 708 | int quoter) |
| 709 | { |
| 710 | error (_("internal error - unimplemented " |
| 711 | "function unk_lang_emit_char called.")); |
| 712 | } |
| 713 | |
| 714 | static void |
| 715 | unk_lang_printchar (int c, struct type *type, struct ui_file *stream) |
| 716 | { |
| 717 | error (_("internal error - unimplemented " |
| 718 | "function unk_lang_printchar called.")); |
| 719 | } |
| 720 | |
| 721 | static void |
| 722 | unk_lang_printstr (struct ui_file *stream, struct type *type, |
| 723 | const gdb_byte *string, unsigned int length, |
| 724 | const char *encoding, int force_ellipses, |
| 725 | const struct value_print_options *options) |
| 726 | { |
| 727 | error (_("internal error - unimplemented " |
| 728 | "function unk_lang_printstr called.")); |
| 729 | } |
| 730 | |
| 731 | static void |
| 732 | unk_lang_print_type (struct type *type, const char *varstring, |
| 733 | struct ui_file *stream, int show, int level, |
| 734 | const struct type_print_options *flags) |
| 735 | { |
| 736 | error (_("internal error - unimplemented " |
| 737 | "function unk_lang_print_type called.")); |
| 738 | } |
| 739 | |
| 740 | static void |
| 741 | unk_lang_val_print (struct type *type, const gdb_byte *valaddr, |
| 742 | int embedded_offset, CORE_ADDR address, |
| 743 | struct ui_file *stream, int recurse, |
| 744 | const struct value *val, |
| 745 | const struct value_print_options *options) |
| 746 | { |
| 747 | error (_("internal error - unimplemented " |
| 748 | "function unk_lang_val_print called.")); |
| 749 | } |
| 750 | |
| 751 | static void |
| 752 | unk_lang_value_print (struct value *val, struct ui_file *stream, |
| 753 | const struct value_print_options *options) |
| 754 | { |
| 755 | error (_("internal error - unimplemented " |
| 756 | "function unk_lang_value_print called.")); |
| 757 | } |
| 758 | |
| 759 | static CORE_ADDR unk_lang_trampoline (struct frame_info *frame, CORE_ADDR pc) |
| 760 | { |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | /* Unknown languages just use the cplus demangler. */ |
| 765 | static char *unk_lang_demangle (const char *mangled, int options) |
| 766 | { |
| 767 | return gdb_demangle (mangled, options); |
| 768 | } |
| 769 | |
| 770 | static char *unk_lang_class_name (const char *mangled) |
| 771 | { |
| 772 | return NULL; |
| 773 | } |
| 774 | |
| 775 | static const struct op_print unk_op_print_tab[] = |
| 776 | { |
| 777 | {NULL, OP_NULL, PREC_NULL, 0} |
| 778 | }; |
| 779 | |
| 780 | static void |
| 781 | unknown_language_arch_info (struct gdbarch *gdbarch, |
| 782 | struct language_arch_info *lai) |
| 783 | { |
| 784 | lai->string_char_type = builtin_type (gdbarch)->builtin_char; |
| 785 | lai->bool_type_default = builtin_type (gdbarch)->builtin_int; |
| 786 | lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, 1, |
| 787 | struct type *); |
| 788 | } |
| 789 | |
| 790 | const struct language_defn unknown_language_defn = |
| 791 | { |
| 792 | "unknown", |
| 793 | "Unknown", |
| 794 | language_unknown, |
| 795 | range_check_off, |
| 796 | case_sensitive_on, |
| 797 | array_row_major, |
| 798 | macro_expansion_no, |
| 799 | &exp_descriptor_standard, |
| 800 | unk_lang_parser, |
| 801 | unk_lang_error, |
| 802 | null_post_parser, |
| 803 | unk_lang_printchar, /* Print character constant */ |
| 804 | unk_lang_printstr, |
| 805 | unk_lang_emit_char, |
| 806 | unk_lang_print_type, /* Print a type using appropriate syntax */ |
| 807 | default_print_typedef, /* Print a typedef using appropriate syntax */ |
| 808 | unk_lang_val_print, /* Print a value using appropriate syntax */ |
| 809 | unk_lang_value_print, /* Print a top-level value */ |
| 810 | default_read_var_value, /* la_read_var_value */ |
| 811 | unk_lang_trampoline, /* Language specific skip_trampoline */ |
| 812 | "this", /* name_of_this */ |
| 813 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 814 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 815 | unk_lang_demangle, /* Language specific symbol demangler */ |
| 816 | unk_lang_class_name, /* Language specific |
| 817 | class_name_from_physname */ |
| 818 | unk_op_print_tab, /* expression operators for printing */ |
| 819 | 1, /* c-style arrays */ |
| 820 | 0, /* String lower bound */ |
| 821 | default_word_break_characters, |
| 822 | default_make_symbol_completion_list, |
| 823 | unknown_language_arch_info, /* la_language_arch_info. */ |
| 824 | default_print_array_index, |
| 825 | default_pass_by_reference, |
| 826 | default_get_string, |
| 827 | NULL, /* la_get_symbol_name_cmp */ |
| 828 | iterate_over_symbols, |
| 829 | &default_varobj_ops, |
| 830 | NULL, |
| 831 | NULL, |
| 832 | LANG_MAGIC |
| 833 | }; |
| 834 | |
| 835 | /* These two structs define fake entries for the "local" and "auto" |
| 836 | options. */ |
| 837 | const struct language_defn auto_language_defn = |
| 838 | { |
| 839 | "auto", |
| 840 | "Auto", |
| 841 | language_auto, |
| 842 | range_check_off, |
| 843 | case_sensitive_on, |
| 844 | array_row_major, |
| 845 | macro_expansion_no, |
| 846 | &exp_descriptor_standard, |
| 847 | unk_lang_parser, |
| 848 | unk_lang_error, |
| 849 | null_post_parser, |
| 850 | unk_lang_printchar, /* Print character constant */ |
| 851 | unk_lang_printstr, |
| 852 | unk_lang_emit_char, |
| 853 | unk_lang_print_type, /* Print a type using appropriate syntax */ |
| 854 | default_print_typedef, /* Print a typedef using appropriate syntax */ |
| 855 | unk_lang_val_print, /* Print a value using appropriate syntax */ |
| 856 | unk_lang_value_print, /* Print a top-level value */ |
| 857 | default_read_var_value, /* la_read_var_value */ |
| 858 | unk_lang_trampoline, /* Language specific skip_trampoline */ |
| 859 | "this", /* name_of_this */ |
| 860 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 861 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 862 | unk_lang_demangle, /* Language specific symbol demangler */ |
| 863 | unk_lang_class_name, /* Language specific |
| 864 | class_name_from_physname */ |
| 865 | unk_op_print_tab, /* expression operators for printing */ |
| 866 | 1, /* c-style arrays */ |
| 867 | 0, /* String lower bound */ |
| 868 | default_word_break_characters, |
| 869 | default_make_symbol_completion_list, |
| 870 | unknown_language_arch_info, /* la_language_arch_info. */ |
| 871 | default_print_array_index, |
| 872 | default_pass_by_reference, |
| 873 | default_get_string, |
| 874 | NULL, /* la_get_symbol_name_cmp */ |
| 875 | iterate_over_symbols, |
| 876 | &default_varobj_ops, |
| 877 | NULL, |
| 878 | NULL, |
| 879 | LANG_MAGIC |
| 880 | }; |
| 881 | |
| 882 | const struct language_defn local_language_defn = |
| 883 | { |
| 884 | "local", |
| 885 | "Local", |
| 886 | language_auto, |
| 887 | range_check_off, |
| 888 | case_sensitive_on, |
| 889 | array_row_major, |
| 890 | macro_expansion_no, |
| 891 | &exp_descriptor_standard, |
| 892 | unk_lang_parser, |
| 893 | unk_lang_error, |
| 894 | null_post_parser, |
| 895 | unk_lang_printchar, /* Print character constant */ |
| 896 | unk_lang_printstr, |
| 897 | unk_lang_emit_char, |
| 898 | unk_lang_print_type, /* Print a type using appropriate syntax */ |
| 899 | default_print_typedef, /* Print a typedef using appropriate syntax */ |
| 900 | unk_lang_val_print, /* Print a value using appropriate syntax */ |
| 901 | unk_lang_value_print, /* Print a top-level value */ |
| 902 | default_read_var_value, /* la_read_var_value */ |
| 903 | unk_lang_trampoline, /* Language specific skip_trampoline */ |
| 904 | "this", /* name_of_this */ |
| 905 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
| 906 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
| 907 | unk_lang_demangle, /* Language specific symbol demangler */ |
| 908 | unk_lang_class_name, /* Language specific |
| 909 | class_name_from_physname */ |
| 910 | unk_op_print_tab, /* expression operators for printing */ |
| 911 | 1, /* c-style arrays */ |
| 912 | 0, /* String lower bound */ |
| 913 | default_word_break_characters, |
| 914 | default_make_symbol_completion_list, |
| 915 | unknown_language_arch_info, /* la_language_arch_info. */ |
| 916 | default_print_array_index, |
| 917 | default_pass_by_reference, |
| 918 | default_get_string, |
| 919 | NULL, /* la_get_symbol_name_cmp */ |
| 920 | iterate_over_symbols, |
| 921 | &default_varobj_ops, |
| 922 | NULL, |
| 923 | NULL, |
| 924 | LANG_MAGIC |
| 925 | }; |
| 926 | \f |
| 927 | /* Per-architecture language information. */ |
| 928 | |
| 929 | static struct gdbarch_data *language_gdbarch_data; |
| 930 | |
| 931 | struct language_gdbarch |
| 932 | { |
| 933 | /* A vector of per-language per-architecture info. Indexed by "enum |
| 934 | language". */ |
| 935 | struct language_arch_info arch_info[nr_languages]; |
| 936 | }; |
| 937 | |
| 938 | static void * |
| 939 | language_gdbarch_post_init (struct gdbarch *gdbarch) |
| 940 | { |
| 941 | struct language_gdbarch *l; |
| 942 | int i; |
| 943 | |
| 944 | l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch); |
| 945 | for (i = 0; i < languages_size; i++) |
| 946 | { |
| 947 | if (languages[i] != NULL |
| 948 | && languages[i]->la_language_arch_info != NULL) |
| 949 | languages[i]->la_language_arch_info |
| 950 | (gdbarch, l->arch_info + languages[i]->la_language); |
| 951 | } |
| 952 | return l; |
| 953 | } |
| 954 | |
| 955 | struct type * |
| 956 | language_string_char_type (const struct language_defn *la, |
| 957 | struct gdbarch *gdbarch) |
| 958 | { |
| 959 | struct language_gdbarch *ld = gdbarch_data (gdbarch, |
| 960 | language_gdbarch_data); |
| 961 | |
| 962 | return ld->arch_info[la->la_language].string_char_type; |
| 963 | } |
| 964 | |
| 965 | struct type * |
| 966 | language_bool_type (const struct language_defn *la, |
| 967 | struct gdbarch *gdbarch) |
| 968 | { |
| 969 | struct language_gdbarch *ld = gdbarch_data (gdbarch, |
| 970 | language_gdbarch_data); |
| 971 | |
| 972 | if (ld->arch_info[la->la_language].bool_type_symbol) |
| 973 | { |
| 974 | struct symbol *sym; |
| 975 | |
| 976 | sym = lookup_symbol (ld->arch_info[la->la_language].bool_type_symbol, |
| 977 | NULL, VAR_DOMAIN, NULL); |
| 978 | if (sym) |
| 979 | { |
| 980 | struct type *type = SYMBOL_TYPE (sym); |
| 981 | |
| 982 | if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) |
| 983 | return type; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | return ld->arch_info[la->la_language].bool_type_default; |
| 988 | } |
| 989 | |
| 990 | /* Helper function for primitive type lookup. */ |
| 991 | |
| 992 | static struct type ** |
| 993 | language_lookup_primitive_type_1 (const struct language_arch_info *lai, |
| 994 | const char *name) |
| 995 | { |
| 996 | struct type **p; |
| 997 | |
| 998 | for (p = lai->primitive_type_vector; (*p) != NULL; p++) |
| 999 | { |
| 1000 | if (strcmp (TYPE_NAME (*p), name) == 0) |
| 1001 | return p; |
| 1002 | } |
| 1003 | return NULL; |
| 1004 | } |
| 1005 | |
| 1006 | /* See language.h. */ |
| 1007 | |
| 1008 | struct type * |
| 1009 | language_lookup_primitive_type (const struct language_defn *la, |
| 1010 | struct gdbarch *gdbarch, |
| 1011 | const char *name) |
| 1012 | { |
| 1013 | struct language_gdbarch *ld = gdbarch_data (gdbarch, |
| 1014 | language_gdbarch_data); |
| 1015 | struct type **typep; |
| 1016 | |
| 1017 | typep = language_lookup_primitive_type_1 (&ld->arch_info[la->la_language], |
| 1018 | name); |
| 1019 | if (typep == NULL) |
| 1020 | return NULL; |
| 1021 | return *typep; |
| 1022 | } |
| 1023 | |
| 1024 | /* Helper function for type lookup as a symbol. |
| 1025 | Create the symbol corresponding to type TYPE in language LANG. */ |
| 1026 | |
| 1027 | static struct symbol * |
| 1028 | language_alloc_type_symbol (enum language lang, struct type *type) |
| 1029 | { |
| 1030 | struct symbol *symbol; |
| 1031 | struct gdbarch *gdbarch; |
| 1032 | |
| 1033 | gdb_assert (!TYPE_OBJFILE_OWNED (type)); |
| 1034 | |
| 1035 | gdbarch = TYPE_OWNER (type).gdbarch; |
| 1036 | symbol = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct symbol); |
| 1037 | |
| 1038 | symbol->ginfo.name = TYPE_NAME (type); |
| 1039 | symbol->ginfo.language = lang; |
| 1040 | symbol->owner.arch = gdbarch; |
| 1041 | SYMBOL_OBJFILE_OWNED (symbol) = 0; |
| 1042 | SYMBOL_TYPE (symbol) = type; |
| 1043 | SYMBOL_DOMAIN (symbol) = VAR_DOMAIN; |
| 1044 | SYMBOL_ACLASS_INDEX (symbol) = LOC_TYPEDEF; |
| 1045 | |
| 1046 | return symbol; |
| 1047 | } |
| 1048 | |
| 1049 | /* Initialize the primitive type symbols of language LD. |
| 1050 | The primitive type vector must have already been initialized. */ |
| 1051 | |
| 1052 | static void |
| 1053 | language_init_primitive_type_symbols (struct language_arch_info *lai, |
| 1054 | const struct language_defn *la, |
| 1055 | struct gdbarch *gdbarch) |
| 1056 | { |
| 1057 | int n; |
| 1058 | struct compunit_symtab *cust; |
| 1059 | struct symtab *symtab; |
| 1060 | struct block *static_block, *global_block; |
| 1061 | |
| 1062 | gdb_assert (lai->primitive_type_vector != NULL); |
| 1063 | |
| 1064 | for (n = 0; lai->primitive_type_vector[n] != NULL; ++n) |
| 1065 | continue; |
| 1066 | |
| 1067 | lai->primitive_type_symbols |
| 1068 | = GDBARCH_OBSTACK_CALLOC (gdbarch, n + 1, struct symbol *); |
| 1069 | |
| 1070 | for (n = 0; lai->primitive_type_vector[n] != NULL; ++n) |
| 1071 | { |
| 1072 | lai->primitive_type_symbols[n] |
| 1073 | = language_alloc_type_symbol (la->la_language, |
| 1074 | lai->primitive_type_vector[n]); |
| 1075 | } |
| 1076 | |
| 1077 | /* Note: The result of symbol lookup is normally a symbol *and* the block |
| 1078 | it was found in (returned in global block_found). Builtin types don't |
| 1079 | live in blocks. We *could* give them one, but there is no current need |
| 1080 | so to keep things simple symbol lookup is extended to allow for |
| 1081 | BLOCK_FOUND to be NULL. */ |
| 1082 | } |
| 1083 | |
| 1084 | /* See language.h. */ |
| 1085 | |
| 1086 | struct symbol * |
| 1087 | language_lookup_primitive_type_as_symbol (const struct language_defn *la, |
| 1088 | struct gdbarch *gdbarch, |
| 1089 | const char *name) |
| 1090 | { |
| 1091 | struct language_gdbarch *ld = gdbarch_data (gdbarch, |
| 1092 | language_gdbarch_data); |
| 1093 | struct language_arch_info *lai = &ld->arch_info[la->la_language]; |
| 1094 | struct type **typep; |
| 1095 | struct symbol *sym; |
| 1096 | |
| 1097 | if (symbol_lookup_debug) |
| 1098 | { |
| 1099 | fprintf_unfiltered (gdb_stdlog, |
| 1100 | "language_lookup_primitive_type_as_symbol" |
| 1101 | " (%s, %s, %s)", |
| 1102 | la->la_name, host_address_to_string (gdbarch), name); |
| 1103 | } |
| 1104 | |
| 1105 | typep = language_lookup_primitive_type_1 (lai, name); |
| 1106 | if (typep == NULL) |
| 1107 | { |
| 1108 | if (symbol_lookup_debug) |
| 1109 | fprintf_unfiltered (gdb_stdlog, " = NULL\n"); |
| 1110 | return NULL; |
| 1111 | } |
| 1112 | |
| 1113 | /* The set of symbols is lazily initialized. */ |
| 1114 | if (lai->primitive_type_symbols == NULL) |
| 1115 | language_init_primitive_type_symbols (lai, la, gdbarch); |
| 1116 | |
| 1117 | sym = lai->primitive_type_symbols[typep - lai->primitive_type_vector]; |
| 1118 | |
| 1119 | if (symbol_lookup_debug) |
| 1120 | fprintf_unfiltered (gdb_stdlog, " = %s\n", host_address_to_string (sym)); |
| 1121 | return sym; |
| 1122 | } |
| 1123 | |
| 1124 | /* Initialize the language routines. */ |
| 1125 | |
| 1126 | void |
| 1127 | _initialize_language (void) |
| 1128 | { |
| 1129 | static const char *const type_or_range_names[] |
| 1130 | = { "on", "off", "warn", "auto", NULL }; |
| 1131 | |
| 1132 | static const char *const case_sensitive_names[] |
| 1133 | = { "on", "off", "auto", NULL }; |
| 1134 | |
| 1135 | language_gdbarch_data |
| 1136 | = gdbarch_data_register_post_init (language_gdbarch_post_init); |
| 1137 | |
| 1138 | /* GDB commands for language specific stuff. */ |
| 1139 | |
| 1140 | add_prefix_cmd ("check", no_class, set_check, |
| 1141 | _("Set the status of the type/range checker."), |
| 1142 | &setchecklist, "set check ", 0, &setlist); |
| 1143 | add_alias_cmd ("c", "check", no_class, 1, &setlist); |
| 1144 | add_alias_cmd ("ch", "check", no_class, 1, &setlist); |
| 1145 | |
| 1146 | add_prefix_cmd ("check", no_class, show_check, |
| 1147 | _("Show the status of the type/range checker."), |
| 1148 | &showchecklist, "show check ", 0, &showlist); |
| 1149 | add_alias_cmd ("c", "check", no_class, 1, &showlist); |
| 1150 | add_alias_cmd ("ch", "check", no_class, 1, &showlist); |
| 1151 | |
| 1152 | add_setshow_enum_cmd ("range", class_support, type_or_range_names, |
| 1153 | &range, |
| 1154 | _("Set range checking. (on/warn/off/auto)"), |
| 1155 | _("Show range checking. (on/warn/off/auto)"), |
| 1156 | NULL, set_range_command, |
| 1157 | show_range_command, |
| 1158 | &setchecklist, &showchecklist); |
| 1159 | |
| 1160 | add_setshow_enum_cmd ("case-sensitive", class_support, case_sensitive_names, |
| 1161 | &case_sensitive, _("\ |
| 1162 | Set case sensitivity in name search. (on/off/auto)"), _("\ |
| 1163 | Show case sensitivity in name search. (on/off/auto)"), _("\ |
| 1164 | For Fortran the default is off; for other languages the default is on."), |
| 1165 | set_case_command, |
| 1166 | show_case_command, |
| 1167 | &setlist, &showlist); |
| 1168 | |
| 1169 | add_language (&auto_language_defn); |
| 1170 | add_language (&local_language_defn); |
| 1171 | add_language (&unknown_language_defn); |
| 1172 | |
| 1173 | language = xstrdup ("auto"); |
| 1174 | type = xstrdup ("auto"); |
| 1175 | range = xstrdup ("auto"); |
| 1176 | case_sensitive = xstrdup ("auto"); |
| 1177 | |
| 1178 | /* Have the above take effect. */ |
| 1179 | set_language (language_auto); |
| 1180 | } |