| 1 | /* General utility routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include <ctype.h> |
| 22 | #include "gdb_wait.h" |
| 23 | #include "event-top.h" |
| 24 | #include "gdbthread.h" |
| 25 | #include "fnmatch.h" |
| 26 | #include "gdb_bfd.h" |
| 27 | #ifdef HAVE_SYS_RESOURCE_H |
| 28 | #include <sys/resource.h> |
| 29 | #endif /* HAVE_SYS_RESOURCE_H */ |
| 30 | |
| 31 | #ifdef TUI |
| 32 | #include "tui/tui.h" /* For tui_get_command_dimension. */ |
| 33 | #endif |
| 34 | |
| 35 | #ifdef __GO32__ |
| 36 | #include <pc.h> |
| 37 | #endif |
| 38 | |
| 39 | #include <signal.h> |
| 40 | #include "gdbcmd.h" |
| 41 | #include "serial.h" |
| 42 | #include "bfd.h" |
| 43 | #include "target.h" |
| 44 | #include "gdb-demangle.h" |
| 45 | #include "expression.h" |
| 46 | #include "language.h" |
| 47 | #include "charset.h" |
| 48 | #include "annotate.h" |
| 49 | #include "filenames.h" |
| 50 | #include "symfile.h" |
| 51 | #include "gdb_obstack.h" |
| 52 | #include "gdbcore.h" |
| 53 | #include "top.h" |
| 54 | #include "main.h" |
| 55 | #include "solist.h" |
| 56 | |
| 57 | #include "inferior.h" /* for signed_pointer_to_address */ |
| 58 | |
| 59 | #include "gdb_curses.h" |
| 60 | |
| 61 | #include "readline/readline.h" |
| 62 | |
| 63 | #include <chrono> |
| 64 | |
| 65 | #include "gdb_usleep.h" |
| 66 | #include "interps.h" |
| 67 | #include "gdb_regex.h" |
| 68 | |
| 69 | #if !HAVE_DECL_MALLOC |
| 70 | extern PTR malloc (); /* ARI: PTR */ |
| 71 | #endif |
| 72 | #if !HAVE_DECL_REALLOC |
| 73 | extern PTR realloc (); /* ARI: PTR */ |
| 74 | #endif |
| 75 | #if !HAVE_DECL_FREE |
| 76 | extern void free (); |
| 77 | #endif |
| 78 | |
| 79 | void (*deprecated_error_begin_hook) (void); |
| 80 | |
| 81 | /* Prototypes for local functions */ |
| 82 | |
| 83 | static void vfprintf_maybe_filtered (struct ui_file *, const char *, |
| 84 | va_list, int) ATTRIBUTE_PRINTF (2, 0); |
| 85 | |
| 86 | static void fputs_maybe_filtered (const char *, struct ui_file *, int); |
| 87 | |
| 88 | static void prompt_for_continue (void); |
| 89 | |
| 90 | static void set_screen_size (void); |
| 91 | static void set_width (void); |
| 92 | |
| 93 | /* Time spent in prompt_for_continue in the currently executing command |
| 94 | waiting for user to respond. |
| 95 | Initialized in make_command_stats_cleanup. |
| 96 | Modified in prompt_for_continue and defaulted_query. |
| 97 | Used in report_command_stats. */ |
| 98 | |
| 99 | static std::chrono::steady_clock::duration prompt_for_continue_wait_time; |
| 100 | |
| 101 | /* A flag indicating whether to timestamp debugging messages. */ |
| 102 | |
| 103 | static int debug_timestamp = 0; |
| 104 | |
| 105 | /* Nonzero if we have job control. */ |
| 106 | |
| 107 | int job_control; |
| 108 | |
| 109 | /* Nonzero means that strings with character values >0x7F should be printed |
| 110 | as octal escapes. Zero means just print the value (e.g. it's an |
| 111 | international character, and the terminal or window can cope.) */ |
| 112 | |
| 113 | int sevenbit_strings = 0; |
| 114 | static void |
| 115 | show_sevenbit_strings (struct ui_file *file, int from_tty, |
| 116 | struct cmd_list_element *c, const char *value) |
| 117 | { |
| 118 | fprintf_filtered (file, _("Printing of 8-bit characters " |
| 119 | "in strings as \\nnn is %s.\n"), |
| 120 | value); |
| 121 | } |
| 122 | |
| 123 | /* String to be printed before warning messages, if any. */ |
| 124 | |
| 125 | char *warning_pre_print = "\nwarning: "; |
| 126 | |
| 127 | int pagination_enabled = 1; |
| 128 | static void |
| 129 | show_pagination_enabled (struct ui_file *file, int from_tty, |
| 130 | struct cmd_list_element *c, const char *value) |
| 131 | { |
| 132 | fprintf_filtered (file, _("State of pagination is %s.\n"), value); |
| 133 | } |
| 134 | |
| 135 | \f |
| 136 | /* Cleanup utilities. |
| 137 | |
| 138 | These are not defined in cleanups.c (nor declared in cleanups.h) |
| 139 | because while they use the "cleanup API" they are not part of the |
| 140 | "cleanup API". */ |
| 141 | |
| 142 | static void |
| 143 | do_freeargv (void *arg) |
| 144 | { |
| 145 | freeargv ((char **) arg); |
| 146 | } |
| 147 | |
| 148 | struct cleanup * |
| 149 | make_cleanup_freeargv (char **arg) |
| 150 | { |
| 151 | return make_cleanup (do_freeargv, arg); |
| 152 | } |
| 153 | |
| 154 | /* Helper function which does the work for make_cleanup_fclose. */ |
| 155 | |
| 156 | static void |
| 157 | do_fclose_cleanup (void *arg) |
| 158 | { |
| 159 | FILE *file = (FILE *) arg; |
| 160 | |
| 161 | fclose (file); |
| 162 | } |
| 163 | |
| 164 | /* Return a new cleanup that closes FILE. */ |
| 165 | |
| 166 | struct cleanup * |
| 167 | make_cleanup_fclose (FILE *file) |
| 168 | { |
| 169 | return make_cleanup (do_fclose_cleanup, file); |
| 170 | } |
| 171 | |
| 172 | /* Helper function which does the work for make_cleanup_obstack_free. */ |
| 173 | |
| 174 | static void |
| 175 | do_obstack_free (void *arg) |
| 176 | { |
| 177 | struct obstack *ob = (struct obstack *) arg; |
| 178 | |
| 179 | obstack_free (ob, NULL); |
| 180 | } |
| 181 | |
| 182 | /* Return a new cleanup that frees OBSTACK. */ |
| 183 | |
| 184 | struct cleanup * |
| 185 | make_cleanup_obstack_free (struct obstack *obstack) |
| 186 | { |
| 187 | return make_cleanup (do_obstack_free, obstack); |
| 188 | } |
| 189 | |
| 190 | /* Helper function for make_cleanup_ui_out_redirect_pop. */ |
| 191 | |
| 192 | static void |
| 193 | do_ui_out_redirect_pop (void *arg) |
| 194 | { |
| 195 | struct ui_out *uiout = (struct ui_out *) arg; |
| 196 | |
| 197 | uiout->redirect (NULL); |
| 198 | } |
| 199 | |
| 200 | /* Return a new cleanup that pops the last redirection by ui_out_redirect |
| 201 | with NULL parameter. */ |
| 202 | |
| 203 | struct cleanup * |
| 204 | make_cleanup_ui_out_redirect_pop (struct ui_out *uiout) |
| 205 | { |
| 206 | return make_cleanup (do_ui_out_redirect_pop, uiout); |
| 207 | } |
| 208 | |
| 209 | static void |
| 210 | do_free_section_addr_info (void *arg) |
| 211 | { |
| 212 | free_section_addr_info ((struct section_addr_info *) arg); |
| 213 | } |
| 214 | |
| 215 | struct cleanup * |
| 216 | make_cleanup_free_section_addr_info (struct section_addr_info *addrs) |
| 217 | { |
| 218 | return make_cleanup (do_free_section_addr_info, addrs); |
| 219 | } |
| 220 | |
| 221 | struct restore_integer_closure |
| 222 | { |
| 223 | int *variable; |
| 224 | int value; |
| 225 | }; |
| 226 | |
| 227 | static void |
| 228 | restore_integer (void *p) |
| 229 | { |
| 230 | struct restore_integer_closure *closure |
| 231 | = (struct restore_integer_closure *) p; |
| 232 | |
| 233 | *(closure->variable) = closure->value; |
| 234 | } |
| 235 | |
| 236 | /* Remember the current value of *VARIABLE and make it restored when |
| 237 | the cleanup is run. */ |
| 238 | |
| 239 | struct cleanup * |
| 240 | make_cleanup_restore_integer (int *variable) |
| 241 | { |
| 242 | struct restore_integer_closure *c = XNEW (struct restore_integer_closure); |
| 243 | |
| 244 | c->variable = variable; |
| 245 | c->value = *variable; |
| 246 | |
| 247 | return make_cleanup_dtor (restore_integer, (void *) c, xfree); |
| 248 | } |
| 249 | |
| 250 | /* Remember the current value of *VARIABLE and make it restored when |
| 251 | the cleanup is run. */ |
| 252 | |
| 253 | struct cleanup * |
| 254 | make_cleanup_restore_uinteger (unsigned int *variable) |
| 255 | { |
| 256 | return make_cleanup_restore_integer ((int *) variable); |
| 257 | } |
| 258 | |
| 259 | /* Helper for make_cleanup_unpush_target. */ |
| 260 | |
| 261 | static void |
| 262 | do_unpush_target (void *arg) |
| 263 | { |
| 264 | struct target_ops *ops = (struct target_ops *) arg; |
| 265 | |
| 266 | unpush_target (ops); |
| 267 | } |
| 268 | |
| 269 | /* Return a new cleanup that unpushes OPS. */ |
| 270 | |
| 271 | struct cleanup * |
| 272 | make_cleanup_unpush_target (struct target_ops *ops) |
| 273 | { |
| 274 | return make_cleanup (do_unpush_target, ops); |
| 275 | } |
| 276 | |
| 277 | /* Helper for make_cleanup_value_free_to_mark. */ |
| 278 | |
| 279 | static void |
| 280 | do_value_free_to_mark (void *value) |
| 281 | { |
| 282 | value_free_to_mark ((struct value *) value); |
| 283 | } |
| 284 | |
| 285 | /* Free all values allocated since MARK was obtained by value_mark |
| 286 | (except for those released) when the cleanup is run. */ |
| 287 | |
| 288 | struct cleanup * |
| 289 | make_cleanup_value_free_to_mark (struct value *mark) |
| 290 | { |
| 291 | return make_cleanup (do_value_free_to_mark, mark); |
| 292 | } |
| 293 | |
| 294 | /* Helper for make_cleanup_value_free. */ |
| 295 | |
| 296 | static void |
| 297 | do_value_free (void *value) |
| 298 | { |
| 299 | value_free ((struct value *) value); |
| 300 | } |
| 301 | |
| 302 | /* Free VALUE. */ |
| 303 | |
| 304 | struct cleanup * |
| 305 | make_cleanup_value_free (struct value *value) |
| 306 | { |
| 307 | return make_cleanup (do_value_free, value); |
| 308 | } |
| 309 | |
| 310 | /* Helper for make_cleanup_free_so. */ |
| 311 | |
| 312 | static void |
| 313 | do_free_so (void *arg) |
| 314 | { |
| 315 | struct so_list *so = (struct so_list *) arg; |
| 316 | |
| 317 | free_so (so); |
| 318 | } |
| 319 | |
| 320 | /* Make cleanup handler calling free_so for SO. */ |
| 321 | |
| 322 | struct cleanup * |
| 323 | make_cleanup_free_so (struct so_list *so) |
| 324 | { |
| 325 | return make_cleanup (do_free_so, so); |
| 326 | } |
| 327 | |
| 328 | /* Helper for make_cleanup_restore_current_language. */ |
| 329 | |
| 330 | static void |
| 331 | do_restore_current_language (void *p) |
| 332 | { |
| 333 | enum language saved_lang = (enum language) (uintptr_t) p; |
| 334 | |
| 335 | set_language (saved_lang); |
| 336 | } |
| 337 | |
| 338 | /* Remember the current value of CURRENT_LANGUAGE and make it restored when |
| 339 | the cleanup is run. */ |
| 340 | |
| 341 | struct cleanup * |
| 342 | make_cleanup_restore_current_language (void) |
| 343 | { |
| 344 | enum language saved_lang = current_language->la_language; |
| 345 | |
| 346 | return make_cleanup (do_restore_current_language, |
| 347 | (void *) (uintptr_t) saved_lang); |
| 348 | } |
| 349 | |
| 350 | /* Helper function for make_cleanup_clear_parser_state. */ |
| 351 | |
| 352 | static void |
| 353 | do_clear_parser_state (void *ptr) |
| 354 | { |
| 355 | struct parser_state **p = (struct parser_state **) ptr; |
| 356 | |
| 357 | *p = NULL; |
| 358 | } |
| 359 | |
| 360 | /* Clean (i.e., set to NULL) the parser state variable P. */ |
| 361 | |
| 362 | struct cleanup * |
| 363 | make_cleanup_clear_parser_state (struct parser_state **p) |
| 364 | { |
| 365 | return make_cleanup (do_clear_parser_state, (void *) p); |
| 366 | } |
| 367 | |
| 368 | /* This function is useful for cleanups. |
| 369 | Do |
| 370 | |
| 371 | foo = xmalloc (...); |
| 372 | old_chain = make_cleanup (free_current_contents, &foo); |
| 373 | |
| 374 | to arrange to free the object thus allocated. */ |
| 375 | |
| 376 | void |
| 377 | free_current_contents (void *ptr) |
| 378 | { |
| 379 | void **location = (void **) ptr; |
| 380 | |
| 381 | if (location == NULL) |
| 382 | internal_error (__FILE__, __LINE__, |
| 383 | _("free_current_contents: NULL pointer")); |
| 384 | if (*location != NULL) |
| 385 | { |
| 386 | xfree (*location); |
| 387 | *location = NULL; |
| 388 | } |
| 389 | } |
| 390 | \f |
| 391 | |
| 392 | |
| 393 | /* Print a warning message. The first argument STRING is the warning |
| 394 | message, used as an fprintf format string, the second is the |
| 395 | va_list of arguments for that string. A warning is unfiltered (not |
| 396 | paginated) so that the user does not need to page through each |
| 397 | screen full of warnings when there are lots of them. */ |
| 398 | |
| 399 | void |
| 400 | vwarning (const char *string, va_list args) |
| 401 | { |
| 402 | if (deprecated_warning_hook) |
| 403 | (*deprecated_warning_hook) (string, args); |
| 404 | else |
| 405 | { |
| 406 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); |
| 407 | |
| 408 | if (target_supports_terminal_ours ()) |
| 409 | { |
| 410 | make_cleanup_restore_target_terminal (); |
| 411 | target_terminal_ours_for_output (); |
| 412 | } |
| 413 | if (filtered_printing_initialized ()) |
| 414 | wrap_here (""); /* Force out any buffered output. */ |
| 415 | gdb_flush (gdb_stdout); |
| 416 | if (warning_pre_print) |
| 417 | fputs_unfiltered (warning_pre_print, gdb_stderr); |
| 418 | vfprintf_unfiltered (gdb_stderr, string, args); |
| 419 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 420 | |
| 421 | do_cleanups (old_chain); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | /* Print an error message and return to command level. |
| 426 | The first argument STRING is the error message, used as a fprintf string, |
| 427 | and the remaining args are passed as arguments to it. */ |
| 428 | |
| 429 | void |
| 430 | verror (const char *string, va_list args) |
| 431 | { |
| 432 | throw_verror (GENERIC_ERROR, string, args); |
| 433 | } |
| 434 | |
| 435 | void |
| 436 | error_stream (const string_file &stream) |
| 437 | { |
| 438 | error (("%s"), stream.c_str ()); |
| 439 | } |
| 440 | |
| 441 | /* Emit a message and abort. */ |
| 442 | |
| 443 | static void ATTRIBUTE_NORETURN |
| 444 | abort_with_message (const char *msg) |
| 445 | { |
| 446 | if (gdb_stderr == NULL) |
| 447 | fputs (msg, stderr); |
| 448 | else |
| 449 | fputs_unfiltered (msg, gdb_stderr); |
| 450 | |
| 451 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 452 | } |
| 453 | |
| 454 | /* Dump core trying to increase the core soft limit to hard limit first. */ |
| 455 | |
| 456 | void |
| 457 | dump_core (void) |
| 458 | { |
| 459 | #ifdef HAVE_SETRLIMIT |
| 460 | struct rlimit rlim = { RLIM_INFINITY, RLIM_INFINITY }; |
| 461 | |
| 462 | setrlimit (RLIMIT_CORE, &rlim); |
| 463 | #endif /* HAVE_SETRLIMIT */ |
| 464 | |
| 465 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 466 | } |
| 467 | |
| 468 | /* Check whether GDB will be able to dump core using the dump_core |
| 469 | function. Returns zero if GDB cannot or should not dump core. |
| 470 | If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected. |
| 471 | If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */ |
| 472 | |
| 473 | int |
| 474 | can_dump_core (enum resource_limit_kind limit_kind) |
| 475 | { |
| 476 | #ifdef HAVE_GETRLIMIT |
| 477 | struct rlimit rlim; |
| 478 | |
| 479 | /* Be quiet and assume we can dump if an error is returned. */ |
| 480 | if (getrlimit (RLIMIT_CORE, &rlim) != 0) |
| 481 | return 1; |
| 482 | |
| 483 | switch (limit_kind) |
| 484 | { |
| 485 | case LIMIT_CUR: |
| 486 | if (rlim.rlim_cur == 0) |
| 487 | return 0; |
| 488 | |
| 489 | case LIMIT_MAX: |
| 490 | if (rlim.rlim_max == 0) |
| 491 | return 0; |
| 492 | } |
| 493 | #endif /* HAVE_GETRLIMIT */ |
| 494 | |
| 495 | return 1; |
| 496 | } |
| 497 | |
| 498 | /* Print a warning that we cannot dump core. */ |
| 499 | |
| 500 | void |
| 501 | warn_cant_dump_core (const char *reason) |
| 502 | { |
| 503 | fprintf_unfiltered (gdb_stderr, |
| 504 | _("%s\nUnable to dump core, use `ulimit -c" |
| 505 | " unlimited' before executing GDB next time.\n"), |
| 506 | reason); |
| 507 | } |
| 508 | |
| 509 | /* Check whether GDB will be able to dump core using the dump_core |
| 510 | function, and print a warning if we cannot. */ |
| 511 | |
| 512 | static int |
| 513 | can_dump_core_warn (enum resource_limit_kind limit_kind, |
| 514 | const char *reason) |
| 515 | { |
| 516 | int core_dump_allowed = can_dump_core (limit_kind); |
| 517 | |
| 518 | if (!core_dump_allowed) |
| 519 | warn_cant_dump_core (reason); |
| 520 | |
| 521 | return core_dump_allowed; |
| 522 | } |
| 523 | |
| 524 | /* Allow the user to configure the debugger behavior with respect to |
| 525 | what to do when an internal problem is detected. */ |
| 526 | |
| 527 | const char internal_problem_ask[] = "ask"; |
| 528 | const char internal_problem_yes[] = "yes"; |
| 529 | const char internal_problem_no[] = "no"; |
| 530 | static const char *const internal_problem_modes[] = |
| 531 | { |
| 532 | internal_problem_ask, |
| 533 | internal_problem_yes, |
| 534 | internal_problem_no, |
| 535 | NULL |
| 536 | }; |
| 537 | |
| 538 | /* Print a message reporting an internal error/warning. Ask the user |
| 539 | if they want to continue, dump core, or just exit. Return |
| 540 | something to indicate a quit. */ |
| 541 | |
| 542 | struct internal_problem |
| 543 | { |
| 544 | const char *name; |
| 545 | int user_settable_should_quit; |
| 546 | const char *should_quit; |
| 547 | int user_settable_should_dump_core; |
| 548 | const char *should_dump_core; |
| 549 | }; |
| 550 | |
| 551 | /* Report a problem, internal to GDB, to the user. Once the problem |
| 552 | has been reported, and assuming GDB didn't quit, the caller can |
| 553 | either allow execution to resume or throw an error. */ |
| 554 | |
| 555 | static void ATTRIBUTE_PRINTF (4, 0) |
| 556 | internal_vproblem (struct internal_problem *problem, |
| 557 | const char *file, int line, const char *fmt, va_list ap) |
| 558 | { |
| 559 | static int dejavu; |
| 560 | int quit_p; |
| 561 | int dump_core_p; |
| 562 | char *reason; |
| 563 | struct cleanup *cleanup = make_cleanup (null_cleanup, NULL); |
| 564 | |
| 565 | /* Don't allow infinite error/warning recursion. */ |
| 566 | { |
| 567 | static char msg[] = "Recursive internal problem.\n"; |
| 568 | |
| 569 | switch (dejavu) |
| 570 | { |
| 571 | case 0: |
| 572 | dejavu = 1; |
| 573 | break; |
| 574 | case 1: |
| 575 | dejavu = 2; |
| 576 | abort_with_message (msg); |
| 577 | default: |
| 578 | dejavu = 3; |
| 579 | /* Newer GLIBC versions put the warn_unused_result attribute |
| 580 | on write, but this is one of those rare cases where |
| 581 | ignoring the return value is correct. Casting to (void) |
| 582 | does not fix this problem. This is the solution suggested |
| 583 | at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */ |
| 584 | if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg)) |
| 585 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 586 | exit (1); |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | /* Create a string containing the full error/warning message. Need |
| 591 | to call query with this full string, as otherwize the reason |
| 592 | (error/warning) and question become separated. Format using a |
| 593 | style similar to a compiler error message. Include extra detail |
| 594 | so that the user knows that they are living on the edge. */ |
| 595 | { |
| 596 | char *msg; |
| 597 | |
| 598 | msg = xstrvprintf (fmt, ap); |
| 599 | reason = xstrprintf ("%s:%d: %s: %s\n" |
| 600 | "A problem internal to GDB has been detected,\n" |
| 601 | "further debugging may prove unreliable.", |
| 602 | file, line, problem->name, msg); |
| 603 | xfree (msg); |
| 604 | make_cleanup (xfree, reason); |
| 605 | } |
| 606 | |
| 607 | /* Fall back to abort_with_message if gdb_stderr is not set up. */ |
| 608 | if (gdb_stderr == NULL) |
| 609 | { |
| 610 | fputs (reason, stderr); |
| 611 | abort_with_message ("\n"); |
| 612 | } |
| 613 | |
| 614 | /* Try to get the message out and at the start of a new line. */ |
| 615 | if (target_supports_terminal_ours ()) |
| 616 | { |
| 617 | make_cleanup_restore_target_terminal (); |
| 618 | target_terminal_ours_for_output (); |
| 619 | } |
| 620 | if (filtered_printing_initialized ()) |
| 621 | begin_line (); |
| 622 | |
| 623 | /* Emit the message unless query will emit it below. */ |
| 624 | if (problem->should_quit != internal_problem_ask |
| 625 | || !confirm |
| 626 | || !filtered_printing_initialized ()) |
| 627 | fprintf_unfiltered (gdb_stderr, "%s\n", reason); |
| 628 | |
| 629 | if (problem->should_quit == internal_problem_ask) |
| 630 | { |
| 631 | /* Default (yes/batch case) is to quit GDB. When in batch mode |
| 632 | this lessens the likelihood of GDB going into an infinite |
| 633 | loop. */ |
| 634 | if (!confirm || !filtered_printing_initialized ()) |
| 635 | quit_p = 1; |
| 636 | else |
| 637 | quit_p = query (_("%s\nQuit this debugging session? "), reason); |
| 638 | } |
| 639 | else if (problem->should_quit == internal_problem_yes) |
| 640 | quit_p = 1; |
| 641 | else if (problem->should_quit == internal_problem_no) |
| 642 | quit_p = 0; |
| 643 | else |
| 644 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 645 | |
| 646 | fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr); |
| 647 | if (REPORT_BUGS_TO[0]) |
| 648 | fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."), |
| 649 | REPORT_BUGS_TO); |
| 650 | fputs_unfiltered ("\n\n", gdb_stderr); |
| 651 | |
| 652 | if (problem->should_dump_core == internal_problem_ask) |
| 653 | { |
| 654 | if (!can_dump_core_warn (LIMIT_MAX, reason)) |
| 655 | dump_core_p = 0; |
| 656 | else if (!filtered_printing_initialized ()) |
| 657 | dump_core_p = 1; |
| 658 | else |
| 659 | { |
| 660 | /* Default (yes/batch case) is to dump core. This leaves a GDB |
| 661 | `dropping' so that it is easier to see that something went |
| 662 | wrong in GDB. */ |
| 663 | dump_core_p = query (_("%s\nCreate a core file of GDB? "), reason); |
| 664 | } |
| 665 | } |
| 666 | else if (problem->should_dump_core == internal_problem_yes) |
| 667 | dump_core_p = can_dump_core_warn (LIMIT_MAX, reason); |
| 668 | else if (problem->should_dump_core == internal_problem_no) |
| 669 | dump_core_p = 0; |
| 670 | else |
| 671 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 672 | |
| 673 | if (quit_p) |
| 674 | { |
| 675 | if (dump_core_p) |
| 676 | dump_core (); |
| 677 | else |
| 678 | exit (1); |
| 679 | } |
| 680 | else |
| 681 | { |
| 682 | if (dump_core_p) |
| 683 | { |
| 684 | #ifdef HAVE_WORKING_FORK |
| 685 | if (fork () == 0) |
| 686 | dump_core (); |
| 687 | #endif |
| 688 | } |
| 689 | } |
| 690 | |
| 691 | dejavu = 0; |
| 692 | do_cleanups (cleanup); |
| 693 | } |
| 694 | |
| 695 | static struct internal_problem internal_error_problem = { |
| 696 | "internal-error", 1, internal_problem_ask, 1, internal_problem_ask |
| 697 | }; |
| 698 | |
| 699 | void |
| 700 | internal_verror (const char *file, int line, const char *fmt, va_list ap) |
| 701 | { |
| 702 | internal_vproblem (&internal_error_problem, file, line, fmt, ap); |
| 703 | throw_quit (_("Command aborted.")); |
| 704 | } |
| 705 | |
| 706 | static struct internal_problem internal_warning_problem = { |
| 707 | "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask |
| 708 | }; |
| 709 | |
| 710 | void |
| 711 | internal_vwarning (const char *file, int line, const char *fmt, va_list ap) |
| 712 | { |
| 713 | internal_vproblem (&internal_warning_problem, file, line, fmt, ap); |
| 714 | } |
| 715 | |
| 716 | static struct internal_problem demangler_warning_problem = { |
| 717 | "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no |
| 718 | }; |
| 719 | |
| 720 | void |
| 721 | demangler_vwarning (const char *file, int line, const char *fmt, va_list ap) |
| 722 | { |
| 723 | internal_vproblem (&demangler_warning_problem, file, line, fmt, ap); |
| 724 | } |
| 725 | |
| 726 | void |
| 727 | demangler_warning (const char *file, int line, const char *string, ...) |
| 728 | { |
| 729 | va_list ap; |
| 730 | |
| 731 | va_start (ap, string); |
| 732 | demangler_vwarning (file, line, string, ap); |
| 733 | va_end (ap); |
| 734 | } |
| 735 | |
| 736 | /* Dummy functions to keep add_prefix_cmd happy. */ |
| 737 | |
| 738 | static void |
| 739 | set_internal_problem_cmd (char *args, int from_tty) |
| 740 | { |
| 741 | } |
| 742 | |
| 743 | static void |
| 744 | show_internal_problem_cmd (char *args, int from_tty) |
| 745 | { |
| 746 | } |
| 747 | |
| 748 | /* When GDB reports an internal problem (error or warning) it gives |
| 749 | the user the opportunity to quit GDB and/or create a core file of |
| 750 | the current debug session. This function registers a few commands |
| 751 | that make it possible to specify that GDB should always or never |
| 752 | quit or create a core file, without asking. The commands look |
| 753 | like: |
| 754 | |
| 755 | maint set PROBLEM-NAME quit ask|yes|no |
| 756 | maint show PROBLEM-NAME quit |
| 757 | maint set PROBLEM-NAME corefile ask|yes|no |
| 758 | maint show PROBLEM-NAME corefile |
| 759 | |
| 760 | Where PROBLEM-NAME is currently "internal-error" or |
| 761 | "internal-warning". */ |
| 762 | |
| 763 | static void |
| 764 | add_internal_problem_command (struct internal_problem *problem) |
| 765 | { |
| 766 | struct cmd_list_element **set_cmd_list; |
| 767 | struct cmd_list_element **show_cmd_list; |
| 768 | char *set_doc; |
| 769 | char *show_doc; |
| 770 | |
| 771 | set_cmd_list = XNEW (struct cmd_list_element *); |
| 772 | show_cmd_list = XNEW (struct cmd_list_element *); |
| 773 | *set_cmd_list = NULL; |
| 774 | *show_cmd_list = NULL; |
| 775 | |
| 776 | set_doc = xstrprintf (_("Configure what GDB does when %s is detected."), |
| 777 | problem->name); |
| 778 | |
| 779 | show_doc = xstrprintf (_("Show what GDB does when %s is detected."), |
| 780 | problem->name); |
| 781 | |
| 782 | add_prefix_cmd ((char*) problem->name, |
| 783 | class_maintenance, set_internal_problem_cmd, set_doc, |
| 784 | set_cmd_list, |
| 785 | concat ("maintenance set ", problem->name, " ", |
| 786 | (char *) NULL), |
| 787 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
| 788 | |
| 789 | add_prefix_cmd ((char*) problem->name, |
| 790 | class_maintenance, show_internal_problem_cmd, show_doc, |
| 791 | show_cmd_list, |
| 792 | concat ("maintenance show ", problem->name, " ", |
| 793 | (char *) NULL), |
| 794 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
| 795 | |
| 796 | if (problem->user_settable_should_quit) |
| 797 | { |
| 798 | set_doc = xstrprintf (_("Set whether GDB should quit " |
| 799 | "when an %s is detected"), |
| 800 | problem->name); |
| 801 | show_doc = xstrprintf (_("Show whether GDB will quit " |
| 802 | "when an %s is detected"), |
| 803 | problem->name); |
| 804 | add_setshow_enum_cmd ("quit", class_maintenance, |
| 805 | internal_problem_modes, |
| 806 | &problem->should_quit, |
| 807 | set_doc, |
| 808 | show_doc, |
| 809 | NULL, /* help_doc */ |
| 810 | NULL, /* setfunc */ |
| 811 | NULL, /* showfunc */ |
| 812 | set_cmd_list, |
| 813 | show_cmd_list); |
| 814 | |
| 815 | xfree (set_doc); |
| 816 | xfree (show_doc); |
| 817 | } |
| 818 | |
| 819 | if (problem->user_settable_should_dump_core) |
| 820 | { |
| 821 | set_doc = xstrprintf (_("Set whether GDB should create a core " |
| 822 | "file of GDB when %s is detected"), |
| 823 | problem->name); |
| 824 | show_doc = xstrprintf (_("Show whether GDB will create a core " |
| 825 | "file of GDB when %s is detected"), |
| 826 | problem->name); |
| 827 | add_setshow_enum_cmd ("corefile", class_maintenance, |
| 828 | internal_problem_modes, |
| 829 | &problem->should_dump_core, |
| 830 | set_doc, |
| 831 | show_doc, |
| 832 | NULL, /* help_doc */ |
| 833 | NULL, /* setfunc */ |
| 834 | NULL, /* showfunc */ |
| 835 | set_cmd_list, |
| 836 | show_cmd_list); |
| 837 | |
| 838 | xfree (set_doc); |
| 839 | xfree (show_doc); |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | /* Return a newly allocated string, containing the PREFIX followed |
| 844 | by the system error message for errno (separated by a colon). |
| 845 | |
| 846 | The result must be deallocated after use. */ |
| 847 | |
| 848 | static char * |
| 849 | perror_string (const char *prefix) |
| 850 | { |
| 851 | char *err; |
| 852 | char *combined; |
| 853 | |
| 854 | err = safe_strerror (errno); |
| 855 | combined = (char *) xmalloc (strlen (err) + strlen (prefix) + 3); |
| 856 | strcpy (combined, prefix); |
| 857 | strcat (combined, ": "); |
| 858 | strcat (combined, err); |
| 859 | |
| 860 | return combined; |
| 861 | } |
| 862 | |
| 863 | /* Print the system error message for errno, and also mention STRING |
| 864 | as the file name for which the error was encountered. Use ERRCODE |
| 865 | for the thrown exception. Then return to command level. */ |
| 866 | |
| 867 | void |
| 868 | throw_perror_with_name (enum errors errcode, const char *string) |
| 869 | { |
| 870 | char *combined; |
| 871 | |
| 872 | combined = perror_string (string); |
| 873 | make_cleanup (xfree, combined); |
| 874 | |
| 875 | /* I understand setting these is a matter of taste. Still, some people |
| 876 | may clear errno but not know about bfd_error. Doing this here is not |
| 877 | unreasonable. */ |
| 878 | bfd_set_error (bfd_error_no_error); |
| 879 | errno = 0; |
| 880 | |
| 881 | throw_error (errcode, _("%s."), combined); |
| 882 | } |
| 883 | |
| 884 | /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */ |
| 885 | |
| 886 | void |
| 887 | perror_with_name (const char *string) |
| 888 | { |
| 889 | throw_perror_with_name (GENERIC_ERROR, string); |
| 890 | } |
| 891 | |
| 892 | /* Same as perror_with_name except that it prints a warning instead |
| 893 | of throwing an error. */ |
| 894 | |
| 895 | void |
| 896 | perror_warning_with_name (const char *string) |
| 897 | { |
| 898 | char *combined; |
| 899 | |
| 900 | combined = perror_string (string); |
| 901 | warning (_("%s"), combined); |
| 902 | xfree (combined); |
| 903 | } |
| 904 | |
| 905 | /* Print the system error message for ERRCODE, and also mention STRING |
| 906 | as the file name for which the error was encountered. */ |
| 907 | |
| 908 | void |
| 909 | print_sys_errmsg (const char *string, int errcode) |
| 910 | { |
| 911 | char *err; |
| 912 | char *combined; |
| 913 | |
| 914 | err = safe_strerror (errcode); |
| 915 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
| 916 | strcpy (combined, string); |
| 917 | strcat (combined, ": "); |
| 918 | strcat (combined, err); |
| 919 | |
| 920 | /* We want anything which was printed on stdout to come out first, before |
| 921 | this message. */ |
| 922 | gdb_flush (gdb_stdout); |
| 923 | fprintf_unfiltered (gdb_stderr, "%s.\n", combined); |
| 924 | } |
| 925 | |
| 926 | /* Control C eventually causes this to be called, at a convenient time. */ |
| 927 | |
| 928 | void |
| 929 | quit (void) |
| 930 | { |
| 931 | struct ui *ui = current_ui; |
| 932 | |
| 933 | if (sync_quit_force_run) |
| 934 | { |
| 935 | sync_quit_force_run = 0; |
| 936 | quit_force (NULL, 0); |
| 937 | } |
| 938 | |
| 939 | #ifdef __MSDOS__ |
| 940 | /* No steenking SIGINT will ever be coming our way when the |
| 941 | program is resumed. Don't lie. */ |
| 942 | throw_quit ("Quit"); |
| 943 | #else |
| 944 | if (job_control |
| 945 | /* If there is no terminal switching for this target, then we can't |
| 946 | possibly get screwed by the lack of job control. */ |
| 947 | || !target_supports_terminal_ours ()) |
| 948 | throw_quit ("Quit"); |
| 949 | else |
| 950 | throw_quit ("Quit (expect signal SIGINT when the program is resumed)"); |
| 951 | #endif |
| 952 | } |
| 953 | |
| 954 | /* See defs.h. */ |
| 955 | |
| 956 | void |
| 957 | maybe_quit (void) |
| 958 | { |
| 959 | if (sync_quit_force_run) |
| 960 | quit (); |
| 961 | |
| 962 | quit_handler (); |
| 963 | |
| 964 | if (deprecated_interactive_hook) |
| 965 | deprecated_interactive_hook (); |
| 966 | } |
| 967 | |
| 968 | \f |
| 969 | /* Called when a memory allocation fails, with the number of bytes of |
| 970 | memory requested in SIZE. */ |
| 971 | |
| 972 | void |
| 973 | malloc_failure (long size) |
| 974 | { |
| 975 | if (size > 0) |
| 976 | { |
| 977 | internal_error (__FILE__, __LINE__, |
| 978 | _("virtual memory exhausted: can't allocate %ld bytes."), |
| 979 | size); |
| 980 | } |
| 981 | else |
| 982 | { |
| 983 | internal_error (__FILE__, __LINE__, _("virtual memory exhausted.")); |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | /* My replacement for the read system call. |
| 988 | Used like `read' but keeps going if `read' returns too soon. */ |
| 989 | |
| 990 | int |
| 991 | myread (int desc, char *addr, int len) |
| 992 | { |
| 993 | int val; |
| 994 | int orglen = len; |
| 995 | |
| 996 | while (len > 0) |
| 997 | { |
| 998 | val = read (desc, addr, len); |
| 999 | if (val < 0) |
| 1000 | return val; |
| 1001 | if (val == 0) |
| 1002 | return orglen - len; |
| 1003 | len -= val; |
| 1004 | addr += val; |
| 1005 | } |
| 1006 | return orglen; |
| 1007 | } |
| 1008 | |
| 1009 | void |
| 1010 | print_spaces (int n, struct ui_file *file) |
| 1011 | { |
| 1012 | fputs_unfiltered (n_spaces (n), file); |
| 1013 | } |
| 1014 | |
| 1015 | /* Print a host address. */ |
| 1016 | |
| 1017 | void |
| 1018 | gdb_print_host_address_1 (const void *addr, struct ui_file *stream) |
| 1019 | { |
| 1020 | fprintf_filtered (stream, "%s", host_address_to_string (addr)); |
| 1021 | } |
| 1022 | |
| 1023 | /* See utils.h. */ |
| 1024 | |
| 1025 | char * |
| 1026 | make_hex_string (const gdb_byte *data, size_t length) |
| 1027 | { |
| 1028 | char *result = (char *) xmalloc (length * 2 + 1); |
| 1029 | char *p; |
| 1030 | size_t i; |
| 1031 | |
| 1032 | p = result; |
| 1033 | for (i = 0; i < length; ++i) |
| 1034 | p += xsnprintf (p, 3, "%02x", data[i]); |
| 1035 | *p = '\0'; |
| 1036 | return result; |
| 1037 | } |
| 1038 | |
| 1039 | \f |
| 1040 | |
| 1041 | /* A cleanup function that calls regfree. */ |
| 1042 | |
| 1043 | static void |
| 1044 | do_regfree_cleanup (void *r) |
| 1045 | { |
| 1046 | regfree ((regex_t *) r); |
| 1047 | } |
| 1048 | |
| 1049 | /* Create a new cleanup that frees the compiled regular expression R. */ |
| 1050 | |
| 1051 | struct cleanup * |
| 1052 | make_regfree_cleanup (regex_t *r) |
| 1053 | { |
| 1054 | return make_cleanup (do_regfree_cleanup, r); |
| 1055 | } |
| 1056 | |
| 1057 | /* Return an xmalloc'd error message resulting from a regular |
| 1058 | expression compilation failure. */ |
| 1059 | |
| 1060 | char * |
| 1061 | get_regcomp_error (int code, regex_t *rx) |
| 1062 | { |
| 1063 | size_t length = regerror (code, rx, NULL, 0); |
| 1064 | char *result = (char *) xmalloc (length); |
| 1065 | |
| 1066 | regerror (code, rx, result, length); |
| 1067 | return result; |
| 1068 | } |
| 1069 | |
| 1070 | /* Compile a regexp and throw an exception on error. This returns a |
| 1071 | cleanup to free the resulting pattern on success. RX must not be |
| 1072 | NULL. */ |
| 1073 | |
| 1074 | struct cleanup * |
| 1075 | compile_rx_or_error (regex_t *pattern, const char *rx, const char *message) |
| 1076 | { |
| 1077 | int code; |
| 1078 | |
| 1079 | gdb_assert (rx != NULL); |
| 1080 | |
| 1081 | code = regcomp (pattern, rx, REG_NOSUB); |
| 1082 | if (code != 0) |
| 1083 | { |
| 1084 | char *err = get_regcomp_error (code, pattern); |
| 1085 | |
| 1086 | make_cleanup (xfree, err); |
| 1087 | error (("%s: %s"), message, err); |
| 1088 | } |
| 1089 | |
| 1090 | return make_regfree_cleanup (pattern); |
| 1091 | } |
| 1092 | |
| 1093 | /* A cleanup that simply calls ui_unregister_input_event_handler. */ |
| 1094 | |
| 1095 | static void |
| 1096 | ui_unregister_input_event_handler_cleanup (void *ui) |
| 1097 | { |
| 1098 | ui_unregister_input_event_handler ((struct ui *) ui); |
| 1099 | } |
| 1100 | |
| 1101 | /* Set up to handle input. */ |
| 1102 | |
| 1103 | static struct cleanup * |
| 1104 | prepare_to_handle_input (void) |
| 1105 | { |
| 1106 | struct cleanup *old_chain; |
| 1107 | |
| 1108 | old_chain = make_cleanup_restore_target_terminal (); |
| 1109 | target_terminal_ours (); |
| 1110 | |
| 1111 | ui_register_input_event_handler (current_ui); |
| 1112 | if (current_ui->prompt_state == PROMPT_BLOCKED) |
| 1113 | make_cleanup (ui_unregister_input_event_handler_cleanup, current_ui); |
| 1114 | |
| 1115 | make_cleanup_override_quit_handler (default_quit_handler); |
| 1116 | |
| 1117 | return old_chain; |
| 1118 | } |
| 1119 | |
| 1120 | \f |
| 1121 | |
| 1122 | /* This function supports the query, nquery, and yquery functions. |
| 1123 | Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 1124 | answer is yes, or default the answer to the specified default |
| 1125 | (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a |
| 1126 | default answer, or '\0' for no default. |
| 1127 | CTLSTR is the control string and should end in "? ". It should |
| 1128 | not say how to answer, because we do that. |
| 1129 | ARGS are the arguments passed along with the CTLSTR argument to |
| 1130 | printf. */ |
| 1131 | |
| 1132 | static int ATTRIBUTE_PRINTF (1, 0) |
| 1133 | defaulted_query (const char *ctlstr, const char defchar, va_list args) |
| 1134 | { |
| 1135 | int ans2; |
| 1136 | int retval; |
| 1137 | int def_value; |
| 1138 | char def_answer, not_def_answer; |
| 1139 | char *y_string, *n_string, *question, *prompt; |
| 1140 | struct cleanup *old_chain; |
| 1141 | |
| 1142 | /* Set up according to which answer is the default. */ |
| 1143 | if (defchar == '\0') |
| 1144 | { |
| 1145 | def_value = 1; |
| 1146 | def_answer = 'Y'; |
| 1147 | not_def_answer = 'N'; |
| 1148 | y_string = "y"; |
| 1149 | n_string = "n"; |
| 1150 | } |
| 1151 | else if (defchar == 'y') |
| 1152 | { |
| 1153 | def_value = 1; |
| 1154 | def_answer = 'Y'; |
| 1155 | not_def_answer = 'N'; |
| 1156 | y_string = "[y]"; |
| 1157 | n_string = "n"; |
| 1158 | } |
| 1159 | else |
| 1160 | { |
| 1161 | def_value = 0; |
| 1162 | def_answer = 'N'; |
| 1163 | not_def_answer = 'Y'; |
| 1164 | y_string = "y"; |
| 1165 | n_string = "[n]"; |
| 1166 | } |
| 1167 | |
| 1168 | /* Automatically answer the default value if the user did not want |
| 1169 | prompts or the command was issued with the server prefix. */ |
| 1170 | if (!confirm || server_command) |
| 1171 | return def_value; |
| 1172 | |
| 1173 | /* If input isn't coming from the user directly, just say what |
| 1174 | question we're asking, and then answer the default automatically. This |
| 1175 | way, important error messages don't get lost when talking to GDB |
| 1176 | over a pipe. */ |
| 1177 | if (current_ui->instream != current_ui->stdin_stream |
| 1178 | || !input_interactive_p (current_ui) |
| 1179 | /* Restrict queries to the main UI. */ |
| 1180 | || current_ui != main_ui) |
| 1181 | { |
| 1182 | old_chain = make_cleanup_restore_target_terminal (); |
| 1183 | |
| 1184 | target_terminal_ours_for_output (); |
| 1185 | wrap_here (""); |
| 1186 | vfprintf_filtered (gdb_stdout, ctlstr, args); |
| 1187 | |
| 1188 | printf_filtered (_("(%s or %s) [answered %c; " |
| 1189 | "input not from terminal]\n"), |
| 1190 | y_string, n_string, def_answer); |
| 1191 | gdb_flush (gdb_stdout); |
| 1192 | |
| 1193 | do_cleanups (old_chain); |
| 1194 | return def_value; |
| 1195 | } |
| 1196 | |
| 1197 | if (deprecated_query_hook) |
| 1198 | { |
| 1199 | int res; |
| 1200 | |
| 1201 | old_chain = make_cleanup_restore_target_terminal (); |
| 1202 | res = deprecated_query_hook (ctlstr, args); |
| 1203 | do_cleanups (old_chain); |
| 1204 | return res; |
| 1205 | } |
| 1206 | |
| 1207 | /* Format the question outside of the loop, to avoid reusing args. */ |
| 1208 | question = xstrvprintf (ctlstr, args); |
| 1209 | old_chain = make_cleanup (xfree, question); |
| 1210 | prompt = xstrprintf (_("%s%s(%s or %s) %s"), |
| 1211 | annotation_level > 1 ? "\n\032\032pre-query\n" : "", |
| 1212 | question, y_string, n_string, |
| 1213 | annotation_level > 1 ? "\n\032\032query\n" : ""); |
| 1214 | make_cleanup (xfree, prompt); |
| 1215 | |
| 1216 | /* Used to add duration we waited for user to respond to |
| 1217 | prompt_for_continue_wait_time. */ |
| 1218 | using namespace std::chrono; |
| 1219 | steady_clock::time_point prompt_started = steady_clock::now (); |
| 1220 | |
| 1221 | prepare_to_handle_input (); |
| 1222 | |
| 1223 | while (1) |
| 1224 | { |
| 1225 | char *response, answer; |
| 1226 | |
| 1227 | gdb_flush (gdb_stdout); |
| 1228 | response = gdb_readline_wrapper (prompt); |
| 1229 | |
| 1230 | if (response == NULL) /* C-d */ |
| 1231 | { |
| 1232 | printf_filtered ("EOF [assumed %c]\n", def_answer); |
| 1233 | retval = def_value; |
| 1234 | break; |
| 1235 | } |
| 1236 | |
| 1237 | answer = response[0]; |
| 1238 | xfree (response); |
| 1239 | |
| 1240 | if (answer >= 'a') |
| 1241 | answer -= 040; |
| 1242 | /* Check answer. For the non-default, the user must specify |
| 1243 | the non-default explicitly. */ |
| 1244 | if (answer == not_def_answer) |
| 1245 | { |
| 1246 | retval = !def_value; |
| 1247 | break; |
| 1248 | } |
| 1249 | /* Otherwise, if a default was specified, the user may either |
| 1250 | specify the required input or have it default by entering |
| 1251 | nothing. */ |
| 1252 | if (answer == def_answer |
| 1253 | || (defchar != '\0' && answer == '\0')) |
| 1254 | { |
| 1255 | retval = def_value; |
| 1256 | break; |
| 1257 | } |
| 1258 | /* Invalid entries are not defaulted and require another selection. */ |
| 1259 | printf_filtered (_("Please answer %s or %s.\n"), |
| 1260 | y_string, n_string); |
| 1261 | } |
| 1262 | |
| 1263 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ |
| 1264 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; |
| 1265 | |
| 1266 | if (annotation_level > 1) |
| 1267 | printf_filtered (("\n\032\032post-query\n")); |
| 1268 | do_cleanups (old_chain); |
| 1269 | return retval; |
| 1270 | } |
| 1271 | \f |
| 1272 | |
| 1273 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 1274 | answer is yes, or 0 if answer is defaulted. |
| 1275 | Takes three args which are given to printf to print the question. |
| 1276 | The first, a control string, should end in "? ". |
| 1277 | It should not say how to answer, because we do that. */ |
| 1278 | |
| 1279 | int |
| 1280 | nquery (const char *ctlstr, ...) |
| 1281 | { |
| 1282 | va_list args; |
| 1283 | int ret; |
| 1284 | |
| 1285 | va_start (args, ctlstr); |
| 1286 | ret = defaulted_query (ctlstr, 'n', args); |
| 1287 | va_end (args); |
| 1288 | return ret; |
| 1289 | } |
| 1290 | |
| 1291 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 1292 | answer is yes, or 1 if answer is defaulted. |
| 1293 | Takes three args which are given to printf to print the question. |
| 1294 | The first, a control string, should end in "? ". |
| 1295 | It should not say how to answer, because we do that. */ |
| 1296 | |
| 1297 | int |
| 1298 | yquery (const char *ctlstr, ...) |
| 1299 | { |
| 1300 | va_list args; |
| 1301 | int ret; |
| 1302 | |
| 1303 | va_start (args, ctlstr); |
| 1304 | ret = defaulted_query (ctlstr, 'y', args); |
| 1305 | va_end (args); |
| 1306 | return ret; |
| 1307 | } |
| 1308 | |
| 1309 | /* Ask user a y-or-n question and return 1 iff answer is yes. |
| 1310 | Takes three args which are given to printf to print the question. |
| 1311 | The first, a control string, should end in "? ". |
| 1312 | It should not say how to answer, because we do that. */ |
| 1313 | |
| 1314 | int |
| 1315 | query (const char *ctlstr, ...) |
| 1316 | { |
| 1317 | va_list args; |
| 1318 | int ret; |
| 1319 | |
| 1320 | va_start (args, ctlstr); |
| 1321 | ret = defaulted_query (ctlstr, '\0', args); |
| 1322 | va_end (args); |
| 1323 | return ret; |
| 1324 | } |
| 1325 | |
| 1326 | /* A helper for parse_escape that converts a host character to a |
| 1327 | target character. C is the host character. If conversion is |
| 1328 | possible, then the target character is stored in *TARGET_C and the |
| 1329 | function returns 1. Otherwise, the function returns 0. */ |
| 1330 | |
| 1331 | static int |
| 1332 | host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c) |
| 1333 | { |
| 1334 | struct obstack host_data; |
| 1335 | char the_char = c; |
| 1336 | struct cleanup *cleanups; |
| 1337 | int result = 0; |
| 1338 | |
| 1339 | obstack_init (&host_data); |
| 1340 | cleanups = make_cleanup_obstack_free (&host_data); |
| 1341 | |
| 1342 | convert_between_encodings (target_charset (gdbarch), host_charset (), |
| 1343 | (gdb_byte *) &the_char, 1, 1, |
| 1344 | &host_data, translit_none); |
| 1345 | |
| 1346 | if (obstack_object_size (&host_data) == 1) |
| 1347 | { |
| 1348 | result = 1; |
| 1349 | *target_c = *(char *) obstack_base (&host_data); |
| 1350 | } |
| 1351 | |
| 1352 | do_cleanups (cleanups); |
| 1353 | return result; |
| 1354 | } |
| 1355 | |
| 1356 | /* Parse a C escape sequence. STRING_PTR points to a variable |
| 1357 | containing a pointer to the string to parse. That pointer |
| 1358 | should point to the character after the \. That pointer |
| 1359 | is updated past the characters we use. The value of the |
| 1360 | escape sequence is returned. |
| 1361 | |
| 1362 | A negative value means the sequence \ newline was seen, |
| 1363 | which is supposed to be equivalent to nothing at all. |
| 1364 | |
| 1365 | If \ is followed by a null character, we return a negative |
| 1366 | value and leave the string pointer pointing at the null character. |
| 1367 | |
| 1368 | If \ is followed by 000, we return 0 and leave the string pointer |
| 1369 | after the zeros. A value of 0 does not mean end of string. */ |
| 1370 | |
| 1371 | int |
| 1372 | parse_escape (struct gdbarch *gdbarch, const char **string_ptr) |
| 1373 | { |
| 1374 | int target_char = -2; /* Initialize to avoid GCC warnings. */ |
| 1375 | int c = *(*string_ptr)++; |
| 1376 | |
| 1377 | switch (c) |
| 1378 | { |
| 1379 | case '\n': |
| 1380 | return -2; |
| 1381 | case 0: |
| 1382 | (*string_ptr)--; |
| 1383 | return 0; |
| 1384 | |
| 1385 | case '0': |
| 1386 | case '1': |
| 1387 | case '2': |
| 1388 | case '3': |
| 1389 | case '4': |
| 1390 | case '5': |
| 1391 | case '6': |
| 1392 | case '7': |
| 1393 | { |
| 1394 | int i = host_hex_value (c); |
| 1395 | int count = 0; |
| 1396 | while (++count < 3) |
| 1397 | { |
| 1398 | c = (**string_ptr); |
| 1399 | if (isdigit (c) && c != '8' && c != '9') |
| 1400 | { |
| 1401 | (*string_ptr)++; |
| 1402 | i *= 8; |
| 1403 | i += host_hex_value (c); |
| 1404 | } |
| 1405 | else |
| 1406 | { |
| 1407 | break; |
| 1408 | } |
| 1409 | } |
| 1410 | return i; |
| 1411 | } |
| 1412 | |
| 1413 | case 'a': |
| 1414 | c = '\a'; |
| 1415 | break; |
| 1416 | case 'b': |
| 1417 | c = '\b'; |
| 1418 | break; |
| 1419 | case 'f': |
| 1420 | c = '\f'; |
| 1421 | break; |
| 1422 | case 'n': |
| 1423 | c = '\n'; |
| 1424 | break; |
| 1425 | case 'r': |
| 1426 | c = '\r'; |
| 1427 | break; |
| 1428 | case 't': |
| 1429 | c = '\t'; |
| 1430 | break; |
| 1431 | case 'v': |
| 1432 | c = '\v'; |
| 1433 | break; |
| 1434 | |
| 1435 | default: |
| 1436 | break; |
| 1437 | } |
| 1438 | |
| 1439 | if (!host_char_to_target (gdbarch, c, &target_char)) |
| 1440 | error (_("The escape sequence `\\%c' is equivalent to plain `%c'," |
| 1441 | " which has no equivalent\nin the `%s' character set."), |
| 1442 | c, c, target_charset (gdbarch)); |
| 1443 | return target_char; |
| 1444 | } |
| 1445 | \f |
| 1446 | /* Print the character C on STREAM as part of the contents of a literal |
| 1447 | string whose delimiter is QUOTER. Note that this routine should only |
| 1448 | be called for printing things which are independent of the language |
| 1449 | of the program being debugged. |
| 1450 | |
| 1451 | printchar will normally escape backslashes and instances of QUOTER. If |
| 1452 | QUOTER is 0, printchar won't escape backslashes or any quoting character. |
| 1453 | As a side effect, if you pass the backslash character as the QUOTER, |
| 1454 | printchar will escape backslashes as usual, but not any other quoting |
| 1455 | character. */ |
| 1456 | |
| 1457 | static void |
| 1458 | printchar (int c, void (*do_fputs) (const char *, struct ui_file *), |
| 1459 | void (*do_fprintf) (struct ui_file *, const char *, ...) |
| 1460 | ATTRIBUTE_FPTR_PRINTF_2, struct ui_file *stream, int quoter) |
| 1461 | { |
| 1462 | c &= 0xFF; /* Avoid sign bit follies */ |
| 1463 | |
| 1464 | if (c < 0x20 || /* Low control chars */ |
| 1465 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ |
| 1466 | (sevenbit_strings && c >= 0x80)) |
| 1467 | { /* high order bit set */ |
| 1468 | switch (c) |
| 1469 | { |
| 1470 | case '\n': |
| 1471 | do_fputs ("\\n", stream); |
| 1472 | break; |
| 1473 | case '\b': |
| 1474 | do_fputs ("\\b", stream); |
| 1475 | break; |
| 1476 | case '\t': |
| 1477 | do_fputs ("\\t", stream); |
| 1478 | break; |
| 1479 | case '\f': |
| 1480 | do_fputs ("\\f", stream); |
| 1481 | break; |
| 1482 | case '\r': |
| 1483 | do_fputs ("\\r", stream); |
| 1484 | break; |
| 1485 | case '\033': |
| 1486 | do_fputs ("\\e", stream); |
| 1487 | break; |
| 1488 | case '\007': |
| 1489 | do_fputs ("\\a", stream); |
| 1490 | break; |
| 1491 | default: |
| 1492 | do_fprintf (stream, "\\%.3o", (unsigned int) c); |
| 1493 | break; |
| 1494 | } |
| 1495 | } |
| 1496 | else |
| 1497 | { |
| 1498 | if (quoter != 0 && (c == '\\' || c == quoter)) |
| 1499 | do_fputs ("\\", stream); |
| 1500 | do_fprintf (stream, "%c", c); |
| 1501 | } |
| 1502 | } |
| 1503 | |
| 1504 | /* Print the character C on STREAM as part of the contents of a |
| 1505 | literal string whose delimiter is QUOTER. Note that these routines |
| 1506 | should only be call for printing things which are independent of |
| 1507 | the language of the program being debugged. */ |
| 1508 | |
| 1509 | void |
| 1510 | fputstr_filtered (const char *str, int quoter, struct ui_file *stream) |
| 1511 | { |
| 1512 | while (*str) |
| 1513 | printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter); |
| 1514 | } |
| 1515 | |
| 1516 | void |
| 1517 | fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream) |
| 1518 | { |
| 1519 | while (*str) |
| 1520 | printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter); |
| 1521 | } |
| 1522 | |
| 1523 | void |
| 1524 | fputstrn_filtered (const char *str, int n, int quoter, |
| 1525 | struct ui_file *stream) |
| 1526 | { |
| 1527 | int i; |
| 1528 | |
| 1529 | for (i = 0; i < n; i++) |
| 1530 | printchar (str[i], fputs_filtered, fprintf_filtered, stream, quoter); |
| 1531 | } |
| 1532 | |
| 1533 | void |
| 1534 | fputstrn_unfiltered (const char *str, int n, int quoter, |
| 1535 | struct ui_file *stream) |
| 1536 | { |
| 1537 | int i; |
| 1538 | |
| 1539 | for (i = 0; i < n; i++) |
| 1540 | printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter); |
| 1541 | } |
| 1542 | \f |
| 1543 | |
| 1544 | /* Number of lines per page or UINT_MAX if paging is disabled. */ |
| 1545 | static unsigned int lines_per_page; |
| 1546 | static void |
| 1547 | show_lines_per_page (struct ui_file *file, int from_tty, |
| 1548 | struct cmd_list_element *c, const char *value) |
| 1549 | { |
| 1550 | fprintf_filtered (file, |
| 1551 | _("Number of lines gdb thinks are in a page is %s.\n"), |
| 1552 | value); |
| 1553 | } |
| 1554 | |
| 1555 | /* Number of chars per line or UINT_MAX if line folding is disabled. */ |
| 1556 | static unsigned int chars_per_line; |
| 1557 | static void |
| 1558 | show_chars_per_line (struct ui_file *file, int from_tty, |
| 1559 | struct cmd_list_element *c, const char *value) |
| 1560 | { |
| 1561 | fprintf_filtered (file, |
| 1562 | _("Number of characters gdb thinks " |
| 1563 | "are in a line is %s.\n"), |
| 1564 | value); |
| 1565 | } |
| 1566 | |
| 1567 | /* Current count of lines printed on this page, chars on this line. */ |
| 1568 | static unsigned int lines_printed, chars_printed; |
| 1569 | |
| 1570 | /* Buffer and start column of buffered text, for doing smarter word- |
| 1571 | wrapping. When someone calls wrap_here(), we start buffering output |
| 1572 | that comes through fputs_filtered(). If we see a newline, we just |
| 1573 | spit it out and forget about the wrap_here(). If we see another |
| 1574 | wrap_here(), we spit it out and remember the newer one. If we see |
| 1575 | the end of the line, we spit out a newline, the indent, and then |
| 1576 | the buffered output. */ |
| 1577 | |
| 1578 | /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which |
| 1579 | are waiting to be output (they have already been counted in chars_printed). |
| 1580 | When wrap_buffer[0] is null, the buffer is empty. */ |
| 1581 | static char *wrap_buffer; |
| 1582 | |
| 1583 | /* Pointer in wrap_buffer to the next character to fill. */ |
| 1584 | static char *wrap_pointer; |
| 1585 | |
| 1586 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column |
| 1587 | is non-zero. */ |
| 1588 | static const char *wrap_indent; |
| 1589 | |
| 1590 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping |
| 1591 | is not in effect. */ |
| 1592 | static int wrap_column; |
| 1593 | \f |
| 1594 | |
| 1595 | /* Initialize the number of lines per page and chars per line. */ |
| 1596 | |
| 1597 | void |
| 1598 | init_page_info (void) |
| 1599 | { |
| 1600 | if (batch_flag) |
| 1601 | { |
| 1602 | lines_per_page = UINT_MAX; |
| 1603 | chars_per_line = UINT_MAX; |
| 1604 | } |
| 1605 | else |
| 1606 | #if defined(TUI) |
| 1607 | if (!tui_get_command_dimension (&chars_per_line, &lines_per_page)) |
| 1608 | #endif |
| 1609 | { |
| 1610 | int rows, cols; |
| 1611 | |
| 1612 | #if defined(__GO32__) |
| 1613 | rows = ScreenRows (); |
| 1614 | cols = ScreenCols (); |
| 1615 | lines_per_page = rows; |
| 1616 | chars_per_line = cols; |
| 1617 | #else |
| 1618 | /* Make sure Readline has initialized its terminal settings. */ |
| 1619 | rl_reset_terminal (NULL); |
| 1620 | |
| 1621 | /* Get the screen size from Readline. */ |
| 1622 | rl_get_screen_size (&rows, &cols); |
| 1623 | lines_per_page = rows; |
| 1624 | chars_per_line = cols; |
| 1625 | |
| 1626 | /* Readline should have fetched the termcap entry for us. |
| 1627 | Only try to use tgetnum function if rl_get_screen_size |
| 1628 | did not return a useful value. */ |
| 1629 | if (((rows <= 0) && (tgetnum ("li") < 0)) |
| 1630 | /* Also disable paging if inside Emacs. $EMACS was used |
| 1631 | before Emacs v25.1, $INSIDE_EMACS is used since then. */ |
| 1632 | || getenv ("EMACS") || getenv ("INSIDE_EMACS")) |
| 1633 | { |
| 1634 | /* The number of lines per page is not mentioned in the terminal |
| 1635 | description or EMACS evironment variable is set. This probably |
| 1636 | means that paging is not useful, so disable paging. */ |
| 1637 | lines_per_page = UINT_MAX; |
| 1638 | } |
| 1639 | |
| 1640 | /* If the output is not a terminal, don't paginate it. */ |
| 1641 | if (!ui_file_isatty (gdb_stdout)) |
| 1642 | lines_per_page = UINT_MAX; |
| 1643 | #endif |
| 1644 | } |
| 1645 | |
| 1646 | /* We handle SIGWINCH ourselves. */ |
| 1647 | rl_catch_sigwinch = 0; |
| 1648 | |
| 1649 | set_screen_size (); |
| 1650 | set_width (); |
| 1651 | } |
| 1652 | |
| 1653 | /* Return nonzero if filtered printing is initialized. */ |
| 1654 | int |
| 1655 | filtered_printing_initialized (void) |
| 1656 | { |
| 1657 | return wrap_buffer != NULL; |
| 1658 | } |
| 1659 | |
| 1660 | /* Helper for make_cleanup_restore_page_info. */ |
| 1661 | |
| 1662 | static void |
| 1663 | do_restore_page_info_cleanup (void *arg) |
| 1664 | { |
| 1665 | set_screen_size (); |
| 1666 | set_width (); |
| 1667 | } |
| 1668 | |
| 1669 | /* Provide cleanup for restoring the terminal size. */ |
| 1670 | |
| 1671 | struct cleanup * |
| 1672 | make_cleanup_restore_page_info (void) |
| 1673 | { |
| 1674 | struct cleanup *back_to; |
| 1675 | |
| 1676 | back_to = make_cleanup (do_restore_page_info_cleanup, NULL); |
| 1677 | make_cleanup_restore_uinteger (&lines_per_page); |
| 1678 | make_cleanup_restore_uinteger (&chars_per_line); |
| 1679 | |
| 1680 | return back_to; |
| 1681 | } |
| 1682 | |
| 1683 | /* Temporarily set BATCH_FLAG and the associated unlimited terminal size. |
| 1684 | Provide cleanup for restoring the original state. */ |
| 1685 | |
| 1686 | struct cleanup * |
| 1687 | set_batch_flag_and_make_cleanup_restore_page_info (void) |
| 1688 | { |
| 1689 | struct cleanup *back_to = make_cleanup_restore_page_info (); |
| 1690 | |
| 1691 | make_cleanup_restore_integer (&batch_flag); |
| 1692 | batch_flag = 1; |
| 1693 | init_page_info (); |
| 1694 | |
| 1695 | return back_to; |
| 1696 | } |
| 1697 | |
| 1698 | /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */ |
| 1699 | |
| 1700 | static void |
| 1701 | set_screen_size (void) |
| 1702 | { |
| 1703 | int rows = lines_per_page; |
| 1704 | int cols = chars_per_line; |
| 1705 | |
| 1706 | if (rows <= 0) |
| 1707 | rows = INT_MAX; |
| 1708 | |
| 1709 | if (cols <= 0) |
| 1710 | cols = INT_MAX; |
| 1711 | |
| 1712 | /* Update Readline's idea of the terminal size. */ |
| 1713 | rl_set_screen_size (rows, cols); |
| 1714 | } |
| 1715 | |
| 1716 | /* Reinitialize WRAP_BUFFER according to the current value of |
| 1717 | CHARS_PER_LINE. */ |
| 1718 | |
| 1719 | static void |
| 1720 | set_width (void) |
| 1721 | { |
| 1722 | if (chars_per_line == 0) |
| 1723 | init_page_info (); |
| 1724 | |
| 1725 | if (!wrap_buffer) |
| 1726 | { |
| 1727 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); |
| 1728 | wrap_buffer[0] = '\0'; |
| 1729 | } |
| 1730 | else |
| 1731 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); |
| 1732 | wrap_pointer = wrap_buffer; /* Start it at the beginning. */ |
| 1733 | } |
| 1734 | |
| 1735 | static void |
| 1736 | set_width_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1737 | { |
| 1738 | set_screen_size (); |
| 1739 | set_width (); |
| 1740 | } |
| 1741 | |
| 1742 | static void |
| 1743 | set_height_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1744 | { |
| 1745 | set_screen_size (); |
| 1746 | } |
| 1747 | |
| 1748 | /* See utils.h. */ |
| 1749 | |
| 1750 | void |
| 1751 | set_screen_width_and_height (int width, int height) |
| 1752 | { |
| 1753 | lines_per_page = height; |
| 1754 | chars_per_line = width; |
| 1755 | |
| 1756 | set_screen_size (); |
| 1757 | set_width (); |
| 1758 | } |
| 1759 | |
| 1760 | /* Wait, so the user can read what's on the screen. Prompt the user |
| 1761 | to continue by pressing RETURN. 'q' is also provided because |
| 1762 | telling users what to do in the prompt is more user-friendly than |
| 1763 | expecting them to think of Ctrl-C/SIGINT. */ |
| 1764 | |
| 1765 | static void |
| 1766 | prompt_for_continue (void) |
| 1767 | { |
| 1768 | char *ignore; |
| 1769 | char cont_prompt[120]; |
| 1770 | struct cleanup *old_chain = make_cleanup (null_cleanup, NULL); |
| 1771 | /* Used to add duration we waited for user to respond to |
| 1772 | prompt_for_continue_wait_time. */ |
| 1773 | using namespace std::chrono; |
| 1774 | steady_clock::time_point prompt_started = steady_clock::now (); |
| 1775 | |
| 1776 | if (annotation_level > 1) |
| 1777 | printf_unfiltered (("\n\032\032pre-prompt-for-continue\n")); |
| 1778 | |
| 1779 | strcpy (cont_prompt, |
| 1780 | "---Type <return> to continue, or q <return> to quit---"); |
| 1781 | if (annotation_level > 1) |
| 1782 | strcat (cont_prompt, "\n\032\032prompt-for-continue\n"); |
| 1783 | |
| 1784 | /* We must do this *before* we call gdb_readline_wrapper, else it |
| 1785 | will eventually call us -- thinking that we're trying to print |
| 1786 | beyond the end of the screen. */ |
| 1787 | reinitialize_more_filter (); |
| 1788 | |
| 1789 | prepare_to_handle_input (); |
| 1790 | |
| 1791 | /* Call gdb_readline_wrapper, not readline, in order to keep an |
| 1792 | event loop running. */ |
| 1793 | ignore = gdb_readline_wrapper (cont_prompt); |
| 1794 | make_cleanup (xfree, ignore); |
| 1795 | |
| 1796 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ |
| 1797 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; |
| 1798 | |
| 1799 | if (annotation_level > 1) |
| 1800 | printf_unfiltered (("\n\032\032post-prompt-for-continue\n")); |
| 1801 | |
| 1802 | if (ignore != NULL) |
| 1803 | { |
| 1804 | char *p = ignore; |
| 1805 | |
| 1806 | while (*p == ' ' || *p == '\t') |
| 1807 | ++p; |
| 1808 | if (p[0] == 'q') |
| 1809 | /* Do not call quit here; there is no possibility of SIGINT. */ |
| 1810 | throw_quit ("Quit"); |
| 1811 | } |
| 1812 | |
| 1813 | /* Now we have to do this again, so that GDB will know that it doesn't |
| 1814 | need to save the ---Type <return>--- line at the top of the screen. */ |
| 1815 | reinitialize_more_filter (); |
| 1816 | |
| 1817 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
| 1818 | |
| 1819 | do_cleanups (old_chain); |
| 1820 | } |
| 1821 | |
| 1822 | /* Initialize timer to keep track of how long we waited for the user. */ |
| 1823 | |
| 1824 | void |
| 1825 | reset_prompt_for_continue_wait_time (void) |
| 1826 | { |
| 1827 | using namespace std::chrono; |
| 1828 | |
| 1829 | prompt_for_continue_wait_time = steady_clock::duration::zero (); |
| 1830 | } |
| 1831 | |
| 1832 | /* Fetch the cumulative time spent in prompt_for_continue. */ |
| 1833 | |
| 1834 | std::chrono::steady_clock::duration |
| 1835 | get_prompt_for_continue_wait_time () |
| 1836 | { |
| 1837 | return prompt_for_continue_wait_time; |
| 1838 | } |
| 1839 | |
| 1840 | /* Reinitialize filter; ie. tell it to reset to original values. */ |
| 1841 | |
| 1842 | void |
| 1843 | reinitialize_more_filter (void) |
| 1844 | { |
| 1845 | lines_printed = 0; |
| 1846 | chars_printed = 0; |
| 1847 | } |
| 1848 | |
| 1849 | /* Indicate that if the next sequence of characters overflows the line, |
| 1850 | a newline should be inserted here rather than when it hits the end. |
| 1851 | If INDENT is non-null, it is a string to be printed to indent the |
| 1852 | wrapped part on the next line. INDENT must remain accessible until |
| 1853 | the next call to wrap_here() or until a newline is printed through |
| 1854 | fputs_filtered(). |
| 1855 | |
| 1856 | If the line is already overfull, we immediately print a newline and |
| 1857 | the indentation, and disable further wrapping. |
| 1858 | |
| 1859 | If we don't know the width of lines, but we know the page height, |
| 1860 | we must not wrap words, but should still keep track of newlines |
| 1861 | that were explicitly printed. |
| 1862 | |
| 1863 | INDENT should not contain tabs, as that will mess up the char count |
| 1864 | on the next line. FIXME. |
| 1865 | |
| 1866 | This routine is guaranteed to force out any output which has been |
| 1867 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be |
| 1868 | used to force out output from the wrap_buffer. */ |
| 1869 | |
| 1870 | void |
| 1871 | wrap_here (const char *indent) |
| 1872 | { |
| 1873 | /* This should have been allocated, but be paranoid anyway. */ |
| 1874 | if (!wrap_buffer) |
| 1875 | internal_error (__FILE__, __LINE__, |
| 1876 | _("failed internal consistency check")); |
| 1877 | |
| 1878 | if (wrap_buffer[0]) |
| 1879 | { |
| 1880 | *wrap_pointer = '\0'; |
| 1881 | fputs_unfiltered (wrap_buffer, gdb_stdout); |
| 1882 | } |
| 1883 | wrap_pointer = wrap_buffer; |
| 1884 | wrap_buffer[0] = '\0'; |
| 1885 | if (chars_per_line == UINT_MAX) /* No line overflow checking. */ |
| 1886 | { |
| 1887 | wrap_column = 0; |
| 1888 | } |
| 1889 | else if (chars_printed >= chars_per_line) |
| 1890 | { |
| 1891 | puts_filtered ("\n"); |
| 1892 | if (indent != NULL) |
| 1893 | puts_filtered (indent); |
| 1894 | wrap_column = 0; |
| 1895 | } |
| 1896 | else |
| 1897 | { |
| 1898 | wrap_column = chars_printed; |
| 1899 | if (indent == NULL) |
| 1900 | wrap_indent = ""; |
| 1901 | else |
| 1902 | wrap_indent = indent; |
| 1903 | } |
| 1904 | } |
| 1905 | |
| 1906 | /* Print input string to gdb_stdout, filtered, with wrap, |
| 1907 | arranging strings in columns of n chars. String can be |
| 1908 | right or left justified in the column. Never prints |
| 1909 | trailing spaces. String should never be longer than |
| 1910 | width. FIXME: this could be useful for the EXAMINE |
| 1911 | command, which currently doesn't tabulate very well. */ |
| 1912 | |
| 1913 | void |
| 1914 | puts_filtered_tabular (char *string, int width, int right) |
| 1915 | { |
| 1916 | int spaces = 0; |
| 1917 | int stringlen; |
| 1918 | char *spacebuf; |
| 1919 | |
| 1920 | gdb_assert (chars_per_line > 0); |
| 1921 | if (chars_per_line == UINT_MAX) |
| 1922 | { |
| 1923 | fputs_filtered (string, gdb_stdout); |
| 1924 | fputs_filtered ("\n", gdb_stdout); |
| 1925 | return; |
| 1926 | } |
| 1927 | |
| 1928 | if (((chars_printed - 1) / width + 2) * width >= chars_per_line) |
| 1929 | fputs_filtered ("\n", gdb_stdout); |
| 1930 | |
| 1931 | if (width >= chars_per_line) |
| 1932 | width = chars_per_line - 1; |
| 1933 | |
| 1934 | stringlen = strlen (string); |
| 1935 | |
| 1936 | if (chars_printed > 0) |
| 1937 | spaces = width - (chars_printed - 1) % width - 1; |
| 1938 | if (right) |
| 1939 | spaces += width - stringlen; |
| 1940 | |
| 1941 | spacebuf = (char *) alloca (spaces + 1); |
| 1942 | spacebuf[spaces] = '\0'; |
| 1943 | while (spaces--) |
| 1944 | spacebuf[spaces] = ' '; |
| 1945 | |
| 1946 | fputs_filtered (spacebuf, gdb_stdout); |
| 1947 | fputs_filtered (string, gdb_stdout); |
| 1948 | } |
| 1949 | |
| 1950 | |
| 1951 | /* Ensure that whatever gets printed next, using the filtered output |
| 1952 | commands, starts at the beginning of the line. I.e. if there is |
| 1953 | any pending output for the current line, flush it and start a new |
| 1954 | line. Otherwise do nothing. */ |
| 1955 | |
| 1956 | void |
| 1957 | begin_line (void) |
| 1958 | { |
| 1959 | if (chars_printed > 0) |
| 1960 | { |
| 1961 | puts_filtered ("\n"); |
| 1962 | } |
| 1963 | } |
| 1964 | |
| 1965 | |
| 1966 | /* Like fputs but if FILTER is true, pause after every screenful. |
| 1967 | |
| 1968 | Regardless of FILTER can wrap at points other than the final |
| 1969 | character of a line. |
| 1970 | |
| 1971 | Unlike fputs, fputs_maybe_filtered does not return a value. |
| 1972 | It is OK for LINEBUFFER to be NULL, in which case just don't print |
| 1973 | anything. |
| 1974 | |
| 1975 | Note that a longjmp to top level may occur in this routine (only if |
| 1976 | FILTER is true) (since prompt_for_continue may do so) so this |
| 1977 | routine should not be called when cleanups are not in place. */ |
| 1978 | |
| 1979 | static void |
| 1980 | fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream, |
| 1981 | int filter) |
| 1982 | { |
| 1983 | const char *lineptr; |
| 1984 | |
| 1985 | if (linebuffer == 0) |
| 1986 | return; |
| 1987 | |
| 1988 | /* Don't do any filtering if it is disabled. */ |
| 1989 | if (stream != gdb_stdout |
| 1990 | || !pagination_enabled |
| 1991 | || batch_flag |
| 1992 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX) |
| 1993 | || top_level_interpreter () == NULL |
| 1994 | || interp_ui_out (top_level_interpreter ())->is_mi_like_p ()) |
| 1995 | { |
| 1996 | fputs_unfiltered (linebuffer, stream); |
| 1997 | return; |
| 1998 | } |
| 1999 | |
| 2000 | /* Go through and output each character. Show line extension |
| 2001 | when this is necessary; prompt user for new page when this is |
| 2002 | necessary. */ |
| 2003 | |
| 2004 | lineptr = linebuffer; |
| 2005 | while (*lineptr) |
| 2006 | { |
| 2007 | /* Possible new page. */ |
| 2008 | if (filter && (lines_printed >= lines_per_page - 1)) |
| 2009 | prompt_for_continue (); |
| 2010 | |
| 2011 | while (*lineptr && *lineptr != '\n') |
| 2012 | { |
| 2013 | /* Print a single line. */ |
| 2014 | if (*lineptr == '\t') |
| 2015 | { |
| 2016 | if (wrap_column) |
| 2017 | *wrap_pointer++ = '\t'; |
| 2018 | else |
| 2019 | fputc_unfiltered ('\t', stream); |
| 2020 | /* Shifting right by 3 produces the number of tab stops |
| 2021 | we have already passed, and then adding one and |
| 2022 | shifting left 3 advances to the next tab stop. */ |
| 2023 | chars_printed = ((chars_printed >> 3) + 1) << 3; |
| 2024 | lineptr++; |
| 2025 | } |
| 2026 | else |
| 2027 | { |
| 2028 | if (wrap_column) |
| 2029 | *wrap_pointer++ = *lineptr; |
| 2030 | else |
| 2031 | fputc_unfiltered (*lineptr, stream); |
| 2032 | chars_printed++; |
| 2033 | lineptr++; |
| 2034 | } |
| 2035 | |
| 2036 | if (chars_printed >= chars_per_line) |
| 2037 | { |
| 2038 | unsigned int save_chars = chars_printed; |
| 2039 | |
| 2040 | chars_printed = 0; |
| 2041 | lines_printed++; |
| 2042 | /* If we aren't actually wrapping, don't output newline -- |
| 2043 | if chars_per_line is right, we probably just overflowed |
| 2044 | anyway; if it's wrong, let us keep going. */ |
| 2045 | if (wrap_column) |
| 2046 | fputc_unfiltered ('\n', stream); |
| 2047 | |
| 2048 | /* Possible new page. */ |
| 2049 | if (lines_printed >= lines_per_page - 1) |
| 2050 | prompt_for_continue (); |
| 2051 | |
| 2052 | /* Now output indentation and wrapped string. */ |
| 2053 | if (wrap_column) |
| 2054 | { |
| 2055 | fputs_unfiltered (wrap_indent, stream); |
| 2056 | *wrap_pointer = '\0'; /* Null-terminate saved stuff, */ |
| 2057 | fputs_unfiltered (wrap_buffer, stream); /* and eject it. */ |
| 2058 | /* FIXME, this strlen is what prevents wrap_indent from |
| 2059 | containing tabs. However, if we recurse to print it |
| 2060 | and count its chars, we risk trouble if wrap_indent is |
| 2061 | longer than (the user settable) chars_per_line. |
| 2062 | Note also that this can set chars_printed > chars_per_line |
| 2063 | if we are printing a long string. */ |
| 2064 | chars_printed = strlen (wrap_indent) |
| 2065 | + (save_chars - wrap_column); |
| 2066 | wrap_pointer = wrap_buffer; /* Reset buffer */ |
| 2067 | wrap_buffer[0] = '\0'; |
| 2068 | wrap_column = 0; /* And disable fancy wrap */ |
| 2069 | } |
| 2070 | } |
| 2071 | } |
| 2072 | |
| 2073 | if (*lineptr == '\n') |
| 2074 | { |
| 2075 | chars_printed = 0; |
| 2076 | wrap_here ((char *) 0); /* Spit out chars, cancel |
| 2077 | further wraps. */ |
| 2078 | lines_printed++; |
| 2079 | fputc_unfiltered ('\n', stream); |
| 2080 | lineptr++; |
| 2081 | } |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | void |
| 2086 | fputs_filtered (const char *linebuffer, struct ui_file *stream) |
| 2087 | { |
| 2088 | fputs_maybe_filtered (linebuffer, stream, 1); |
| 2089 | } |
| 2090 | |
| 2091 | int |
| 2092 | putchar_unfiltered (int c) |
| 2093 | { |
| 2094 | char buf = c; |
| 2095 | |
| 2096 | ui_file_write (gdb_stdout, &buf, 1); |
| 2097 | return c; |
| 2098 | } |
| 2099 | |
| 2100 | /* Write character C to gdb_stdout using GDB's paging mechanism and return C. |
| 2101 | May return nonlocally. */ |
| 2102 | |
| 2103 | int |
| 2104 | putchar_filtered (int c) |
| 2105 | { |
| 2106 | return fputc_filtered (c, gdb_stdout); |
| 2107 | } |
| 2108 | |
| 2109 | int |
| 2110 | fputc_unfiltered (int c, struct ui_file *stream) |
| 2111 | { |
| 2112 | char buf = c; |
| 2113 | |
| 2114 | ui_file_write (stream, &buf, 1); |
| 2115 | return c; |
| 2116 | } |
| 2117 | |
| 2118 | int |
| 2119 | fputc_filtered (int c, struct ui_file *stream) |
| 2120 | { |
| 2121 | char buf[2]; |
| 2122 | |
| 2123 | buf[0] = c; |
| 2124 | buf[1] = 0; |
| 2125 | fputs_filtered (buf, stream); |
| 2126 | return c; |
| 2127 | } |
| 2128 | |
| 2129 | /* puts_debug is like fputs_unfiltered, except it prints special |
| 2130 | characters in printable fashion. */ |
| 2131 | |
| 2132 | void |
| 2133 | puts_debug (char *prefix, char *string, char *suffix) |
| 2134 | { |
| 2135 | int ch; |
| 2136 | |
| 2137 | /* Print prefix and suffix after each line. */ |
| 2138 | static int new_line = 1; |
| 2139 | static int return_p = 0; |
| 2140 | static char *prev_prefix = ""; |
| 2141 | static char *prev_suffix = ""; |
| 2142 | |
| 2143 | if (*string == '\n') |
| 2144 | return_p = 0; |
| 2145 | |
| 2146 | /* If the prefix is changing, print the previous suffix, a new line, |
| 2147 | and the new prefix. */ |
| 2148 | if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line) |
| 2149 | { |
| 2150 | fputs_unfiltered (prev_suffix, gdb_stdlog); |
| 2151 | fputs_unfiltered ("\n", gdb_stdlog); |
| 2152 | fputs_unfiltered (prefix, gdb_stdlog); |
| 2153 | } |
| 2154 | |
| 2155 | /* Print prefix if we printed a newline during the previous call. */ |
| 2156 | if (new_line) |
| 2157 | { |
| 2158 | new_line = 0; |
| 2159 | fputs_unfiltered (prefix, gdb_stdlog); |
| 2160 | } |
| 2161 | |
| 2162 | prev_prefix = prefix; |
| 2163 | prev_suffix = suffix; |
| 2164 | |
| 2165 | /* Output characters in a printable format. */ |
| 2166 | while ((ch = *string++) != '\0') |
| 2167 | { |
| 2168 | switch (ch) |
| 2169 | { |
| 2170 | default: |
| 2171 | if (isprint (ch)) |
| 2172 | fputc_unfiltered (ch, gdb_stdlog); |
| 2173 | |
| 2174 | else |
| 2175 | fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff); |
| 2176 | break; |
| 2177 | |
| 2178 | case '\\': |
| 2179 | fputs_unfiltered ("\\\\", gdb_stdlog); |
| 2180 | break; |
| 2181 | case '\b': |
| 2182 | fputs_unfiltered ("\\b", gdb_stdlog); |
| 2183 | break; |
| 2184 | case '\f': |
| 2185 | fputs_unfiltered ("\\f", gdb_stdlog); |
| 2186 | break; |
| 2187 | case '\n': |
| 2188 | new_line = 1; |
| 2189 | fputs_unfiltered ("\\n", gdb_stdlog); |
| 2190 | break; |
| 2191 | case '\r': |
| 2192 | fputs_unfiltered ("\\r", gdb_stdlog); |
| 2193 | break; |
| 2194 | case '\t': |
| 2195 | fputs_unfiltered ("\\t", gdb_stdlog); |
| 2196 | break; |
| 2197 | case '\v': |
| 2198 | fputs_unfiltered ("\\v", gdb_stdlog); |
| 2199 | break; |
| 2200 | } |
| 2201 | |
| 2202 | return_p = ch == '\r'; |
| 2203 | } |
| 2204 | |
| 2205 | /* Print suffix if we printed a newline. */ |
| 2206 | if (new_line) |
| 2207 | { |
| 2208 | fputs_unfiltered (suffix, gdb_stdlog); |
| 2209 | fputs_unfiltered ("\n", gdb_stdlog); |
| 2210 | } |
| 2211 | } |
| 2212 | |
| 2213 | |
| 2214 | /* Print a variable number of ARGS using format FORMAT. If this |
| 2215 | information is going to put the amount written (since the last call |
| 2216 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, |
| 2217 | call prompt_for_continue to get the users permision to continue. |
| 2218 | |
| 2219 | Unlike fprintf, this function does not return a value. |
| 2220 | |
| 2221 | We implement three variants, vfprintf (takes a vararg list and stream), |
| 2222 | fprintf (takes a stream to write on), and printf (the usual). |
| 2223 | |
| 2224 | Note also that a longjmp to top level may occur in this routine |
| 2225 | (since prompt_for_continue may do so) so this routine should not be |
| 2226 | called when cleanups are not in place. */ |
| 2227 | |
| 2228 | static void |
| 2229 | vfprintf_maybe_filtered (struct ui_file *stream, const char *format, |
| 2230 | va_list args, int filter) |
| 2231 | { |
| 2232 | char *linebuffer; |
| 2233 | struct cleanup *old_cleanups; |
| 2234 | |
| 2235 | linebuffer = xstrvprintf (format, args); |
| 2236 | old_cleanups = make_cleanup (xfree, linebuffer); |
| 2237 | fputs_maybe_filtered (linebuffer, stream, filter); |
| 2238 | do_cleanups (old_cleanups); |
| 2239 | } |
| 2240 | |
| 2241 | |
| 2242 | void |
| 2243 | vfprintf_filtered (struct ui_file *stream, const char *format, va_list args) |
| 2244 | { |
| 2245 | vfprintf_maybe_filtered (stream, format, args, 1); |
| 2246 | } |
| 2247 | |
| 2248 | void |
| 2249 | vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args) |
| 2250 | { |
| 2251 | char *linebuffer; |
| 2252 | struct cleanup *old_cleanups; |
| 2253 | |
| 2254 | linebuffer = xstrvprintf (format, args); |
| 2255 | old_cleanups = make_cleanup (xfree, linebuffer); |
| 2256 | if (debug_timestamp && stream == gdb_stdlog) |
| 2257 | { |
| 2258 | using namespace std::chrono; |
| 2259 | int len, need_nl; |
| 2260 | |
| 2261 | steady_clock::time_point now = steady_clock::now (); |
| 2262 | seconds s = duration_cast<seconds> (now.time_since_epoch ()); |
| 2263 | microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s); |
| 2264 | |
| 2265 | len = strlen (linebuffer); |
| 2266 | need_nl = (len > 0 && linebuffer[len - 1] != '\n'); |
| 2267 | |
| 2268 | std::string timestamp = string_printf ("%ld.%06ld %s%s", |
| 2269 | (long) s.count (), |
| 2270 | (long) us.count (), |
| 2271 | linebuffer, need_nl ? "\n": ""); |
| 2272 | fputs_unfiltered (timestamp.c_str (), stream); |
| 2273 | } |
| 2274 | else |
| 2275 | fputs_unfiltered (linebuffer, stream); |
| 2276 | do_cleanups (old_cleanups); |
| 2277 | } |
| 2278 | |
| 2279 | void |
| 2280 | vprintf_filtered (const char *format, va_list args) |
| 2281 | { |
| 2282 | vfprintf_maybe_filtered (gdb_stdout, format, args, 1); |
| 2283 | } |
| 2284 | |
| 2285 | void |
| 2286 | vprintf_unfiltered (const char *format, va_list args) |
| 2287 | { |
| 2288 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 2289 | } |
| 2290 | |
| 2291 | void |
| 2292 | fprintf_filtered (struct ui_file *stream, const char *format, ...) |
| 2293 | { |
| 2294 | va_list args; |
| 2295 | |
| 2296 | va_start (args, format); |
| 2297 | vfprintf_filtered (stream, format, args); |
| 2298 | va_end (args); |
| 2299 | } |
| 2300 | |
| 2301 | void |
| 2302 | fprintf_unfiltered (struct ui_file *stream, const char *format, ...) |
| 2303 | { |
| 2304 | va_list args; |
| 2305 | |
| 2306 | va_start (args, format); |
| 2307 | vfprintf_unfiltered (stream, format, args); |
| 2308 | va_end (args); |
| 2309 | } |
| 2310 | |
| 2311 | /* Like fprintf_filtered, but prints its result indented. |
| 2312 | Called as fprintfi_filtered (spaces, stream, format, ...); */ |
| 2313 | |
| 2314 | void |
| 2315 | fprintfi_filtered (int spaces, struct ui_file *stream, const char *format, |
| 2316 | ...) |
| 2317 | { |
| 2318 | va_list args; |
| 2319 | |
| 2320 | va_start (args, format); |
| 2321 | print_spaces_filtered (spaces, stream); |
| 2322 | |
| 2323 | vfprintf_filtered (stream, format, args); |
| 2324 | va_end (args); |
| 2325 | } |
| 2326 | |
| 2327 | |
| 2328 | void |
| 2329 | printf_filtered (const char *format, ...) |
| 2330 | { |
| 2331 | va_list args; |
| 2332 | |
| 2333 | va_start (args, format); |
| 2334 | vfprintf_filtered (gdb_stdout, format, args); |
| 2335 | va_end (args); |
| 2336 | } |
| 2337 | |
| 2338 | |
| 2339 | void |
| 2340 | printf_unfiltered (const char *format, ...) |
| 2341 | { |
| 2342 | va_list args; |
| 2343 | |
| 2344 | va_start (args, format); |
| 2345 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 2346 | va_end (args); |
| 2347 | } |
| 2348 | |
| 2349 | /* Like printf_filtered, but prints it's result indented. |
| 2350 | Called as printfi_filtered (spaces, format, ...); */ |
| 2351 | |
| 2352 | void |
| 2353 | printfi_filtered (int spaces, const char *format, ...) |
| 2354 | { |
| 2355 | va_list args; |
| 2356 | |
| 2357 | va_start (args, format); |
| 2358 | print_spaces_filtered (spaces, gdb_stdout); |
| 2359 | vfprintf_filtered (gdb_stdout, format, args); |
| 2360 | va_end (args); |
| 2361 | } |
| 2362 | |
| 2363 | /* Easy -- but watch out! |
| 2364 | |
| 2365 | This routine is *not* a replacement for puts()! puts() appends a newline. |
| 2366 | This one doesn't, and had better not! */ |
| 2367 | |
| 2368 | void |
| 2369 | puts_filtered (const char *string) |
| 2370 | { |
| 2371 | fputs_filtered (string, gdb_stdout); |
| 2372 | } |
| 2373 | |
| 2374 | void |
| 2375 | puts_unfiltered (const char *string) |
| 2376 | { |
| 2377 | fputs_unfiltered (string, gdb_stdout); |
| 2378 | } |
| 2379 | |
| 2380 | /* Return a pointer to N spaces and a null. The pointer is good |
| 2381 | until the next call to here. */ |
| 2382 | char * |
| 2383 | n_spaces (int n) |
| 2384 | { |
| 2385 | char *t; |
| 2386 | static char *spaces = 0; |
| 2387 | static int max_spaces = -1; |
| 2388 | |
| 2389 | if (n > max_spaces) |
| 2390 | { |
| 2391 | if (spaces) |
| 2392 | xfree (spaces); |
| 2393 | spaces = (char *) xmalloc (n + 1); |
| 2394 | for (t = spaces + n; t != spaces;) |
| 2395 | *--t = ' '; |
| 2396 | spaces[n] = '\0'; |
| 2397 | max_spaces = n; |
| 2398 | } |
| 2399 | |
| 2400 | return spaces + max_spaces - n; |
| 2401 | } |
| 2402 | |
| 2403 | /* Print N spaces. */ |
| 2404 | void |
| 2405 | print_spaces_filtered (int n, struct ui_file *stream) |
| 2406 | { |
| 2407 | fputs_filtered (n_spaces (n), stream); |
| 2408 | } |
| 2409 | \f |
| 2410 | /* C++/ObjC demangler stuff. */ |
| 2411 | |
| 2412 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language |
| 2413 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. |
| 2414 | If the name is not mangled, or the language for the name is unknown, or |
| 2415 | demangling is off, the name is printed in its "raw" form. */ |
| 2416 | |
| 2417 | void |
| 2418 | fprintf_symbol_filtered (struct ui_file *stream, const char *name, |
| 2419 | enum language lang, int arg_mode) |
| 2420 | { |
| 2421 | char *demangled; |
| 2422 | |
| 2423 | if (name != NULL) |
| 2424 | { |
| 2425 | /* If user wants to see raw output, no problem. */ |
| 2426 | if (!demangle) |
| 2427 | { |
| 2428 | fputs_filtered (name, stream); |
| 2429 | } |
| 2430 | else |
| 2431 | { |
| 2432 | demangled = language_demangle (language_def (lang), name, arg_mode); |
| 2433 | fputs_filtered (demangled ? demangled : name, stream); |
| 2434 | if (demangled != NULL) |
| 2435 | { |
| 2436 | xfree (demangled); |
| 2437 | } |
| 2438 | } |
| 2439 | } |
| 2440 | } |
| 2441 | |
| 2442 | /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any |
| 2443 | differences in whitespace. Returns 0 if they match, non-zero if they |
| 2444 | don't (slightly different than strcmp()'s range of return values). |
| 2445 | |
| 2446 | As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO". |
| 2447 | This "feature" is useful when searching for matching C++ function names |
| 2448 | (such as if the user types 'break FOO', where FOO is a mangled C++ |
| 2449 | function). */ |
| 2450 | |
| 2451 | int |
| 2452 | strcmp_iw (const char *string1, const char *string2) |
| 2453 | { |
| 2454 | while ((*string1 != '\0') && (*string2 != '\0')) |
| 2455 | { |
| 2456 | while (isspace (*string1)) |
| 2457 | { |
| 2458 | string1++; |
| 2459 | } |
| 2460 | while (isspace (*string2)) |
| 2461 | { |
| 2462 | string2++; |
| 2463 | } |
| 2464 | if (case_sensitivity == case_sensitive_on && *string1 != *string2) |
| 2465 | break; |
| 2466 | if (case_sensitivity == case_sensitive_off |
| 2467 | && (tolower ((unsigned char) *string1) |
| 2468 | != tolower ((unsigned char) *string2))) |
| 2469 | break; |
| 2470 | if (*string1 != '\0') |
| 2471 | { |
| 2472 | string1++; |
| 2473 | string2++; |
| 2474 | } |
| 2475 | } |
| 2476 | return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0'); |
| 2477 | } |
| 2478 | |
| 2479 | /* This is like strcmp except that it ignores whitespace and treats |
| 2480 | '(' as the first non-NULL character in terms of ordering. Like |
| 2481 | strcmp (and unlike strcmp_iw), it returns negative if STRING1 < |
| 2482 | STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2 |
| 2483 | according to that ordering. |
| 2484 | |
| 2485 | If a list is sorted according to this function and if you want to |
| 2486 | find names in the list that match some fixed NAME according to |
| 2487 | strcmp_iw(LIST_ELT, NAME), then the place to start looking is right |
| 2488 | where this function would put NAME. |
| 2489 | |
| 2490 | This function must be neutral to the CASE_SENSITIVITY setting as the user |
| 2491 | may choose it during later lookup. Therefore this function always sorts |
| 2492 | primarily case-insensitively and secondarily case-sensitively. |
| 2493 | |
| 2494 | Here are some examples of why using strcmp to sort is a bad idea: |
| 2495 | |
| 2496 | Whitespace example: |
| 2497 | |
| 2498 | Say your partial symtab contains: "foo<char *>", "goo". Then, if |
| 2499 | we try to do a search for "foo<char*>", strcmp will locate this |
| 2500 | after "foo<char *>" and before "goo". Then lookup_partial_symbol |
| 2501 | will start looking at strings beginning with "goo", and will never |
| 2502 | see the correct match of "foo<char *>". |
| 2503 | |
| 2504 | Parenthesis example: |
| 2505 | |
| 2506 | In practice, this is less like to be an issue, but I'll give it a |
| 2507 | shot. Let's assume that '$' is a legitimate character to occur in |
| 2508 | symbols. (Which may well even be the case on some systems.) Then |
| 2509 | say that the partial symbol table contains "foo$" and "foo(int)". |
| 2510 | strcmp will put them in this order, since '$' < '('. Now, if the |
| 2511 | user searches for "foo", then strcmp will sort "foo" before "foo$". |
| 2512 | Then lookup_partial_symbol will notice that strcmp_iw("foo$", |
| 2513 | "foo") is false, so it won't proceed to the actual match of |
| 2514 | "foo(int)" with "foo". */ |
| 2515 | |
| 2516 | int |
| 2517 | strcmp_iw_ordered (const char *string1, const char *string2) |
| 2518 | { |
| 2519 | const char *saved_string1 = string1, *saved_string2 = string2; |
| 2520 | enum case_sensitivity case_pass = case_sensitive_off; |
| 2521 | |
| 2522 | for (;;) |
| 2523 | { |
| 2524 | /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'. |
| 2525 | Provide stub characters if we are already at the end of one of the |
| 2526 | strings. */ |
| 2527 | char c1 = 'X', c2 = 'X'; |
| 2528 | |
| 2529 | while (*string1 != '\0' && *string2 != '\0') |
| 2530 | { |
| 2531 | while (isspace (*string1)) |
| 2532 | string1++; |
| 2533 | while (isspace (*string2)) |
| 2534 | string2++; |
| 2535 | |
| 2536 | switch (case_pass) |
| 2537 | { |
| 2538 | case case_sensitive_off: |
| 2539 | c1 = tolower ((unsigned char) *string1); |
| 2540 | c2 = tolower ((unsigned char) *string2); |
| 2541 | break; |
| 2542 | case case_sensitive_on: |
| 2543 | c1 = *string1; |
| 2544 | c2 = *string2; |
| 2545 | break; |
| 2546 | } |
| 2547 | if (c1 != c2) |
| 2548 | break; |
| 2549 | |
| 2550 | if (*string1 != '\0') |
| 2551 | { |
| 2552 | string1++; |
| 2553 | string2++; |
| 2554 | } |
| 2555 | } |
| 2556 | |
| 2557 | switch (*string1) |
| 2558 | { |
| 2559 | /* Characters are non-equal unless they're both '\0'; we want to |
| 2560 | make sure we get the comparison right according to our |
| 2561 | comparison in the cases where one of them is '\0' or '('. */ |
| 2562 | case '\0': |
| 2563 | if (*string2 == '\0') |
| 2564 | break; |
| 2565 | else |
| 2566 | return -1; |
| 2567 | case '(': |
| 2568 | if (*string2 == '\0') |
| 2569 | return 1; |
| 2570 | else |
| 2571 | return -1; |
| 2572 | default: |
| 2573 | if (*string2 == '\0' || *string2 == '(') |
| 2574 | return 1; |
| 2575 | else if (c1 > c2) |
| 2576 | return 1; |
| 2577 | else if (c1 < c2) |
| 2578 | return -1; |
| 2579 | /* PASSTHRU */ |
| 2580 | } |
| 2581 | |
| 2582 | if (case_pass == case_sensitive_on) |
| 2583 | return 0; |
| 2584 | |
| 2585 | /* Otherwise the strings were equal in case insensitive way, make |
| 2586 | a more fine grained comparison in a case sensitive way. */ |
| 2587 | |
| 2588 | case_pass = case_sensitive_on; |
| 2589 | string1 = saved_string1; |
| 2590 | string2 = saved_string2; |
| 2591 | } |
| 2592 | } |
| 2593 | |
| 2594 | /* A simple comparison function with opposite semantics to strcmp. */ |
| 2595 | |
| 2596 | int |
| 2597 | streq (const char *lhs, const char *rhs) |
| 2598 | { |
| 2599 | return !strcmp (lhs, rhs); |
| 2600 | } |
| 2601 | \f |
| 2602 | |
| 2603 | /* |
| 2604 | ** subset_compare() |
| 2605 | ** Answer whether string_to_compare is a full or partial match to |
| 2606 | ** template_string. The partial match must be in sequence starting |
| 2607 | ** at index 0. |
| 2608 | */ |
| 2609 | int |
| 2610 | subset_compare (char *string_to_compare, char *template_string) |
| 2611 | { |
| 2612 | int match; |
| 2613 | |
| 2614 | if (template_string != (char *) NULL && string_to_compare != (char *) NULL |
| 2615 | && strlen (string_to_compare) <= strlen (template_string)) |
| 2616 | match = |
| 2617 | (startswith (template_string, string_to_compare)); |
| 2618 | else |
| 2619 | match = 0; |
| 2620 | return match; |
| 2621 | } |
| 2622 | |
| 2623 | static void |
| 2624 | show_debug_timestamp (struct ui_file *file, int from_tty, |
| 2625 | struct cmd_list_element *c, const char *value) |
| 2626 | { |
| 2627 | fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"), |
| 2628 | value); |
| 2629 | } |
| 2630 | \f |
| 2631 | |
| 2632 | void |
| 2633 | initialize_utils (void) |
| 2634 | { |
| 2635 | add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\ |
| 2636 | Set number of characters where GDB should wrap lines of its output."), _("\ |
| 2637 | Show number of characters where GDB should wrap lines of its output."), _("\ |
| 2638 | This affects where GDB wraps its output to fit the screen width.\n\ |
| 2639 | Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."), |
| 2640 | set_width_command, |
| 2641 | show_chars_per_line, |
| 2642 | &setlist, &showlist); |
| 2643 | |
| 2644 | add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\ |
| 2645 | Set number of lines in a page for GDB output pagination."), _("\ |
| 2646 | Show number of lines in a page for GDB output pagination."), _("\ |
| 2647 | This affects the number of lines after which GDB will pause\n\ |
| 2648 | its output and ask you whether to continue.\n\ |
| 2649 | Setting this to \"unlimited\" or zero causes GDB never pause during output."), |
| 2650 | set_height_command, |
| 2651 | show_lines_per_page, |
| 2652 | &setlist, &showlist); |
| 2653 | |
| 2654 | add_setshow_boolean_cmd ("pagination", class_support, |
| 2655 | &pagination_enabled, _("\ |
| 2656 | Set state of GDB output pagination."), _("\ |
| 2657 | Show state of GDB output pagination."), _("\ |
| 2658 | When pagination is ON, GDB pauses at end of each screenful of\n\ |
| 2659 | its output and asks you whether to continue.\n\ |
| 2660 | Turning pagination off is an alternative to \"set height unlimited\"."), |
| 2661 | NULL, |
| 2662 | show_pagination_enabled, |
| 2663 | &setlist, &showlist); |
| 2664 | |
| 2665 | add_setshow_boolean_cmd ("sevenbit-strings", class_support, |
| 2666 | &sevenbit_strings, _("\ |
| 2667 | Set printing of 8-bit characters in strings as \\nnn."), _("\ |
| 2668 | Show printing of 8-bit characters in strings as \\nnn."), NULL, |
| 2669 | NULL, |
| 2670 | show_sevenbit_strings, |
| 2671 | &setprintlist, &showprintlist); |
| 2672 | |
| 2673 | add_setshow_boolean_cmd ("timestamp", class_maintenance, |
| 2674 | &debug_timestamp, _("\ |
| 2675 | Set timestamping of debugging messages."), _("\ |
| 2676 | Show timestamping of debugging messages."), _("\ |
| 2677 | When set, debugging messages will be marked with seconds and microseconds."), |
| 2678 | NULL, |
| 2679 | show_debug_timestamp, |
| 2680 | &setdebuglist, &showdebuglist); |
| 2681 | } |
| 2682 | |
| 2683 | const char * |
| 2684 | paddress (struct gdbarch *gdbarch, CORE_ADDR addr) |
| 2685 | { |
| 2686 | /* Truncate address to the size of a target address, avoiding shifts |
| 2687 | larger or equal than the width of a CORE_ADDR. The local |
| 2688 | variable ADDR_BIT stops the compiler reporting a shift overflow |
| 2689 | when it won't occur. */ |
| 2690 | /* NOTE: This assumes that the significant address information is |
| 2691 | kept in the least significant bits of ADDR - the upper bits were |
| 2692 | either zero or sign extended. Should gdbarch_address_to_pointer or |
| 2693 | some ADDRESS_TO_PRINTABLE() be used to do the conversion? */ |
| 2694 | |
| 2695 | int addr_bit = gdbarch_addr_bit (gdbarch); |
| 2696 | |
| 2697 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 2698 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 2699 | return hex_string (addr); |
| 2700 | } |
| 2701 | |
| 2702 | /* This function is described in "defs.h". */ |
| 2703 | |
| 2704 | const char * |
| 2705 | print_core_address (struct gdbarch *gdbarch, CORE_ADDR address) |
| 2706 | { |
| 2707 | int addr_bit = gdbarch_addr_bit (gdbarch); |
| 2708 | |
| 2709 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 2710 | address &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 2711 | |
| 2712 | /* FIXME: cagney/2002-05-03: Need local_address_string() function |
| 2713 | that returns the language localized string formatted to a width |
| 2714 | based on gdbarch_addr_bit. */ |
| 2715 | if (addr_bit <= 32) |
| 2716 | return hex_string_custom (address, 8); |
| 2717 | else |
| 2718 | return hex_string_custom (address, 16); |
| 2719 | } |
| 2720 | |
| 2721 | /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */ |
| 2722 | |
| 2723 | hashval_t |
| 2724 | core_addr_hash (const void *ap) |
| 2725 | { |
| 2726 | const CORE_ADDR *addrp = (const CORE_ADDR *) ap; |
| 2727 | |
| 2728 | return *addrp; |
| 2729 | } |
| 2730 | |
| 2731 | /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */ |
| 2732 | |
| 2733 | int |
| 2734 | core_addr_eq (const void *ap, const void *bp) |
| 2735 | { |
| 2736 | const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap; |
| 2737 | const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp; |
| 2738 | |
| 2739 | return *addr_ap == *addr_bp; |
| 2740 | } |
| 2741 | |
| 2742 | /* Convert a string back into a CORE_ADDR. */ |
| 2743 | CORE_ADDR |
| 2744 | string_to_core_addr (const char *my_string) |
| 2745 | { |
| 2746 | CORE_ADDR addr = 0; |
| 2747 | |
| 2748 | if (my_string[0] == '0' && tolower (my_string[1]) == 'x') |
| 2749 | { |
| 2750 | /* Assume that it is in hex. */ |
| 2751 | int i; |
| 2752 | |
| 2753 | for (i = 2; my_string[i] != '\0'; i++) |
| 2754 | { |
| 2755 | if (isdigit (my_string[i])) |
| 2756 | addr = (my_string[i] - '0') + (addr * 16); |
| 2757 | else if (isxdigit (my_string[i])) |
| 2758 | addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16); |
| 2759 | else |
| 2760 | error (_("invalid hex \"%s\""), my_string); |
| 2761 | } |
| 2762 | } |
| 2763 | else |
| 2764 | { |
| 2765 | /* Assume that it is in decimal. */ |
| 2766 | int i; |
| 2767 | |
| 2768 | for (i = 0; my_string[i] != '\0'; i++) |
| 2769 | { |
| 2770 | if (isdigit (my_string[i])) |
| 2771 | addr = (my_string[i] - '0') + (addr * 10); |
| 2772 | else |
| 2773 | error (_("invalid decimal \"%s\""), my_string); |
| 2774 | } |
| 2775 | } |
| 2776 | |
| 2777 | return addr; |
| 2778 | } |
| 2779 | |
| 2780 | char * |
| 2781 | gdb_realpath (const char *filename) |
| 2782 | { |
| 2783 | /* On most hosts, we rely on canonicalize_file_name to compute |
| 2784 | the FILENAME's realpath. |
| 2785 | |
| 2786 | But the situation is slightly more complex on Windows, due to some |
| 2787 | versions of GCC which were reported to generate paths where |
| 2788 | backlashes (the directory separator) were doubled. For instance: |
| 2789 | c:\\some\\double\\slashes\\dir |
| 2790 | ... instead of ... |
| 2791 | c:\some\double\slashes\dir |
| 2792 | Those double-slashes were getting in the way when comparing paths, |
| 2793 | for instance when trying to insert a breakpoint as follow: |
| 2794 | (gdb) b c:/some/double/slashes/dir/foo.c:4 |
| 2795 | No source file named c:/some/double/slashes/dir/foo.c:4. |
| 2796 | (gdb) b c:\some\double\slashes\dir\foo.c:4 |
| 2797 | No source file named c:\some\double\slashes\dir\foo.c:4. |
| 2798 | To prevent this from happening, we need this function to always |
| 2799 | strip those extra backslashes. While canonicalize_file_name does |
| 2800 | perform this simplification, it only works when the path is valid. |
| 2801 | Since the simplification would be useful even if the path is not |
| 2802 | valid (one can always set a breakpoint on a file, even if the file |
| 2803 | does not exist locally), we rely instead on GetFullPathName to |
| 2804 | perform the canonicalization. */ |
| 2805 | |
| 2806 | #if defined (_WIN32) |
| 2807 | { |
| 2808 | char buf[MAX_PATH]; |
| 2809 | DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL); |
| 2810 | |
| 2811 | /* The file system is case-insensitive but case-preserving. |
| 2812 | So it is important we do not lowercase the path. Otherwise, |
| 2813 | we might not be able to display the original casing in a given |
| 2814 | path. */ |
| 2815 | if (len > 0 && len < MAX_PATH) |
| 2816 | return xstrdup (buf); |
| 2817 | } |
| 2818 | #else |
| 2819 | { |
| 2820 | char *rp = canonicalize_file_name (filename); |
| 2821 | |
| 2822 | if (rp != NULL) |
| 2823 | return rp; |
| 2824 | } |
| 2825 | #endif |
| 2826 | |
| 2827 | /* This system is a lost cause, just dup the buffer. */ |
| 2828 | return xstrdup (filename); |
| 2829 | } |
| 2830 | |
| 2831 | /* Return a copy of FILENAME, with its directory prefix canonicalized |
| 2832 | by gdb_realpath. */ |
| 2833 | |
| 2834 | char * |
| 2835 | gdb_realpath_keepfile (const char *filename) |
| 2836 | { |
| 2837 | const char *base_name = lbasename (filename); |
| 2838 | char *dir_name; |
| 2839 | char *real_path; |
| 2840 | char *result; |
| 2841 | |
| 2842 | /* Extract the basename of filename, and return immediately |
| 2843 | a copy of filename if it does not contain any directory prefix. */ |
| 2844 | if (base_name == filename) |
| 2845 | return xstrdup (filename); |
| 2846 | |
| 2847 | dir_name = (char *) alloca ((size_t) (base_name - filename + 2)); |
| 2848 | /* Allocate enough space to store the dir_name + plus one extra |
| 2849 | character sometimes needed under Windows (see below), and |
| 2850 | then the closing \000 character. */ |
| 2851 | strncpy (dir_name, filename, base_name - filename); |
| 2852 | dir_name[base_name - filename] = '\000'; |
| 2853 | |
| 2854 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 2855 | /* We need to be careful when filename is of the form 'd:foo', which |
| 2856 | is equivalent of d:./foo, which is totally different from d:/foo. */ |
| 2857 | if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':') |
| 2858 | { |
| 2859 | dir_name[2] = '.'; |
| 2860 | dir_name[3] = '\000'; |
| 2861 | } |
| 2862 | #endif |
| 2863 | |
| 2864 | /* Canonicalize the directory prefix, and build the resulting |
| 2865 | filename. If the dirname realpath already contains an ending |
| 2866 | directory separator, avoid doubling it. */ |
| 2867 | real_path = gdb_realpath (dir_name); |
| 2868 | if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1])) |
| 2869 | result = concat (real_path, base_name, (char *) NULL); |
| 2870 | else |
| 2871 | result = concat (real_path, SLASH_STRING, base_name, (char *) NULL); |
| 2872 | |
| 2873 | xfree (real_path); |
| 2874 | return result; |
| 2875 | } |
| 2876 | |
| 2877 | /* Return PATH in absolute form, performing tilde-expansion if necessary. |
| 2878 | PATH cannot be NULL or the empty string. |
| 2879 | This does not resolve symlinks however, use gdb_realpath for that. |
| 2880 | Space for the result is allocated with malloc. |
| 2881 | If the path is already absolute, it is strdup'd. |
| 2882 | If there is a problem computing the absolute path, the path is returned |
| 2883 | unchanged (still strdup'd). */ |
| 2884 | |
| 2885 | char * |
| 2886 | gdb_abspath (const char *path) |
| 2887 | { |
| 2888 | gdb_assert (path != NULL && path[0] != '\0'); |
| 2889 | |
| 2890 | if (path[0] == '~') |
| 2891 | return tilde_expand (path); |
| 2892 | |
| 2893 | if (IS_ABSOLUTE_PATH (path)) |
| 2894 | return xstrdup (path); |
| 2895 | |
| 2896 | /* Beware the // my son, the Emacs barfs, the botch that catch... */ |
| 2897 | return concat (current_directory, |
| 2898 | IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1]) |
| 2899 | ? "" : SLASH_STRING, |
| 2900 | path, (char *) NULL); |
| 2901 | } |
| 2902 | |
| 2903 | ULONGEST |
| 2904 | align_up (ULONGEST v, int n) |
| 2905 | { |
| 2906 | /* Check that N is really a power of two. */ |
| 2907 | gdb_assert (n && (n & (n-1)) == 0); |
| 2908 | return (v + n - 1) & -n; |
| 2909 | } |
| 2910 | |
| 2911 | ULONGEST |
| 2912 | align_down (ULONGEST v, int n) |
| 2913 | { |
| 2914 | /* Check that N is really a power of two. */ |
| 2915 | gdb_assert (n && (n & (n-1)) == 0); |
| 2916 | return (v & -n); |
| 2917 | } |
| 2918 | |
| 2919 | /* Allocation function for the libiberty hash table which uses an |
| 2920 | obstack. The obstack is passed as DATA. */ |
| 2921 | |
| 2922 | void * |
| 2923 | hashtab_obstack_allocate (void *data, size_t size, size_t count) |
| 2924 | { |
| 2925 | size_t total = size * count; |
| 2926 | void *ptr = obstack_alloc ((struct obstack *) data, total); |
| 2927 | |
| 2928 | memset (ptr, 0, total); |
| 2929 | return ptr; |
| 2930 | } |
| 2931 | |
| 2932 | /* Trivial deallocation function for the libiberty splay tree and hash |
| 2933 | table - don't deallocate anything. Rely on later deletion of the |
| 2934 | obstack. DATA will be the obstack, although it is not needed |
| 2935 | here. */ |
| 2936 | |
| 2937 | void |
| 2938 | dummy_obstack_deallocate (void *object, void *data) |
| 2939 | { |
| 2940 | return; |
| 2941 | } |
| 2942 | |
| 2943 | /* Simple, portable version of dirname that does not modify its |
| 2944 | argument. */ |
| 2945 | |
| 2946 | char * |
| 2947 | ldirname (const char *filename) |
| 2948 | { |
| 2949 | const char *base = lbasename (filename); |
| 2950 | char *dirname; |
| 2951 | |
| 2952 | while (base > filename && IS_DIR_SEPARATOR (base[-1])) |
| 2953 | --base; |
| 2954 | |
| 2955 | if (base == filename) |
| 2956 | return NULL; |
| 2957 | |
| 2958 | dirname = (char *) xmalloc (base - filename + 2); |
| 2959 | memcpy (dirname, filename, base - filename); |
| 2960 | |
| 2961 | /* On DOS based file systems, convert "d:foo" to "d:.", so that we |
| 2962 | create "d:./bar" later instead of the (different) "d:/bar". */ |
| 2963 | if (base - filename == 2 && IS_ABSOLUTE_PATH (base) |
| 2964 | && !IS_DIR_SEPARATOR (filename[0])) |
| 2965 | dirname[base++ - filename] = '.'; |
| 2966 | |
| 2967 | dirname[base - filename] = '\0'; |
| 2968 | return dirname; |
| 2969 | } |
| 2970 | |
| 2971 | /* Call libiberty's buildargv, and return the result. |
| 2972 | If buildargv fails due to out-of-memory, call nomem. |
| 2973 | Therefore, the returned value is guaranteed to be non-NULL, |
| 2974 | unless the parameter itself is NULL. */ |
| 2975 | |
| 2976 | char ** |
| 2977 | gdb_buildargv (const char *s) |
| 2978 | { |
| 2979 | char **argv = buildargv (s); |
| 2980 | |
| 2981 | if (s != NULL && argv == NULL) |
| 2982 | malloc_failure (0); |
| 2983 | return argv; |
| 2984 | } |
| 2985 | |
| 2986 | int |
| 2987 | compare_positive_ints (const void *ap, const void *bp) |
| 2988 | { |
| 2989 | /* Because we know we're comparing two ints which are positive, |
| 2990 | there's no danger of overflow here. */ |
| 2991 | return * (int *) ap - * (int *) bp; |
| 2992 | } |
| 2993 | |
| 2994 | /* String compare function for qsort. */ |
| 2995 | |
| 2996 | int |
| 2997 | compare_strings (const void *arg1, const void *arg2) |
| 2998 | { |
| 2999 | const char **s1 = (const char **) arg1; |
| 3000 | const char **s2 = (const char **) arg2; |
| 3001 | |
| 3002 | return strcmp (*s1, *s2); |
| 3003 | } |
| 3004 | |
| 3005 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" |
| 3006 | #define AMBIGUOUS_MESS2 \ |
| 3007 | ".\nUse \"set gnutarget format-name\" to specify the format." |
| 3008 | |
| 3009 | const char * |
| 3010 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) |
| 3011 | { |
| 3012 | char *ret, *retp; |
| 3013 | int ret_len; |
| 3014 | char **p; |
| 3015 | |
| 3016 | /* Check if errmsg just need simple return. */ |
| 3017 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) |
| 3018 | return bfd_errmsg (error_tag); |
| 3019 | |
| 3020 | ret_len = strlen (bfd_errmsg (error_tag)) + strlen (AMBIGUOUS_MESS1) |
| 3021 | + strlen (AMBIGUOUS_MESS2); |
| 3022 | for (p = matching; *p; p++) |
| 3023 | ret_len += strlen (*p) + 1; |
| 3024 | ret = (char *) xmalloc (ret_len + 1); |
| 3025 | retp = ret; |
| 3026 | make_cleanup (xfree, ret); |
| 3027 | |
| 3028 | strcpy (retp, bfd_errmsg (error_tag)); |
| 3029 | retp += strlen (retp); |
| 3030 | |
| 3031 | strcpy (retp, AMBIGUOUS_MESS1); |
| 3032 | retp += strlen (retp); |
| 3033 | |
| 3034 | for (p = matching; *p; p++) |
| 3035 | { |
| 3036 | sprintf (retp, " %s", *p); |
| 3037 | retp += strlen (retp); |
| 3038 | } |
| 3039 | xfree (matching); |
| 3040 | |
| 3041 | strcpy (retp, AMBIGUOUS_MESS2); |
| 3042 | |
| 3043 | return ret; |
| 3044 | } |
| 3045 | |
| 3046 | /* Return ARGS parsed as a valid pid, or throw an error. */ |
| 3047 | |
| 3048 | int |
| 3049 | parse_pid_to_attach (const char *args) |
| 3050 | { |
| 3051 | unsigned long pid; |
| 3052 | char *dummy; |
| 3053 | |
| 3054 | if (!args) |
| 3055 | error_no_arg (_("process-id to attach")); |
| 3056 | |
| 3057 | dummy = (char *) args; |
| 3058 | pid = strtoul (args, &dummy, 0); |
| 3059 | /* Some targets don't set errno on errors, grrr! */ |
| 3060 | if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)]) |
| 3061 | error (_("Illegal process-id: %s."), args); |
| 3062 | |
| 3063 | return pid; |
| 3064 | } |
| 3065 | |
| 3066 | /* Helper for make_bpstat_clear_actions_cleanup. */ |
| 3067 | |
| 3068 | static void |
| 3069 | do_bpstat_clear_actions_cleanup (void *unused) |
| 3070 | { |
| 3071 | bpstat_clear_actions (); |
| 3072 | } |
| 3073 | |
| 3074 | /* Call bpstat_clear_actions for the case an exception is throw. You should |
| 3075 | discard_cleanups if no exception is caught. */ |
| 3076 | |
| 3077 | struct cleanup * |
| 3078 | make_bpstat_clear_actions_cleanup (void) |
| 3079 | { |
| 3080 | return make_cleanup (do_bpstat_clear_actions_cleanup, NULL); |
| 3081 | } |
| 3082 | |
| 3083 | /* Check for GCC >= 4.x according to the symtab->producer string. Return minor |
| 3084 | version (x) of 4.x in such case. If it is not GCC or it is GCC older than |
| 3085 | 4.x return -1. If it is GCC 5.x or higher return INT_MAX. */ |
| 3086 | |
| 3087 | int |
| 3088 | producer_is_gcc_ge_4 (const char *producer) |
| 3089 | { |
| 3090 | int major, minor; |
| 3091 | |
| 3092 | if (! producer_is_gcc (producer, &major, &minor)) |
| 3093 | return -1; |
| 3094 | if (major < 4) |
| 3095 | return -1; |
| 3096 | if (major > 4) |
| 3097 | return INT_MAX; |
| 3098 | return minor; |
| 3099 | } |
| 3100 | |
| 3101 | /* Returns nonzero if the given PRODUCER string is GCC and sets the MAJOR |
| 3102 | and MINOR versions when not NULL. Returns zero if the given PRODUCER |
| 3103 | is NULL or it isn't GCC. */ |
| 3104 | |
| 3105 | int |
| 3106 | producer_is_gcc (const char *producer, int *major, int *minor) |
| 3107 | { |
| 3108 | const char *cs; |
| 3109 | |
| 3110 | if (producer != NULL && startswith (producer, "GNU ")) |
| 3111 | { |
| 3112 | int maj, min; |
| 3113 | |
| 3114 | if (major == NULL) |
| 3115 | major = &maj; |
| 3116 | if (minor == NULL) |
| 3117 | minor = &min; |
| 3118 | |
| 3119 | /* Skip any identifier after "GNU " - such as "C11" or "C++". |
| 3120 | A full producer string might look like: |
| 3121 | "GNU C 4.7.2" |
| 3122 | "GNU Fortran 4.8.2 20140120 (Red Hat 4.8.2-16) -mtune=generic ..." |
| 3123 | "GNU C++14 5.0.0 20150123 (experimental)" |
| 3124 | */ |
| 3125 | cs = &producer[strlen ("GNU ")]; |
| 3126 | while (*cs && !isspace (*cs)) |
| 3127 | cs++; |
| 3128 | if (*cs && isspace (*cs)) |
| 3129 | cs++; |
| 3130 | if (sscanf (cs, "%d.%d", major, minor) == 2) |
| 3131 | return 1; |
| 3132 | } |
| 3133 | |
| 3134 | /* Not recognized as GCC. */ |
| 3135 | return 0; |
| 3136 | } |
| 3137 | |
| 3138 | /* Helper for make_cleanup_free_char_ptr_vec. */ |
| 3139 | |
| 3140 | static void |
| 3141 | do_free_char_ptr_vec (void *arg) |
| 3142 | { |
| 3143 | VEC (char_ptr) *char_ptr_vec = (VEC (char_ptr) *) arg; |
| 3144 | |
| 3145 | free_char_ptr_vec (char_ptr_vec); |
| 3146 | } |
| 3147 | |
| 3148 | /* Make cleanup handler calling xfree for each element of CHAR_PTR_VEC and |
| 3149 | final VEC_free for CHAR_PTR_VEC itself. |
| 3150 | |
| 3151 | You must not modify CHAR_PTR_VEC after this cleanup registration as the |
| 3152 | CHAR_PTR_VEC base address may change on its updates. Contrary to VEC_free |
| 3153 | this function does not (cannot) clear the pointer. */ |
| 3154 | |
| 3155 | struct cleanup * |
| 3156 | make_cleanup_free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec) |
| 3157 | { |
| 3158 | return make_cleanup (do_free_char_ptr_vec, char_ptr_vec); |
| 3159 | } |
| 3160 | |
| 3161 | /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP |
| 3162 | must come from xrealloc-compatible allocator and it may be updated. FROM |
| 3163 | needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be |
| 3164 | located at the start or end of *STRINGP. */ |
| 3165 | |
| 3166 | void |
| 3167 | substitute_path_component (char **stringp, const char *from, const char *to) |
| 3168 | { |
| 3169 | char *string = *stringp, *s; |
| 3170 | const size_t from_len = strlen (from); |
| 3171 | const size_t to_len = strlen (to); |
| 3172 | |
| 3173 | for (s = string;;) |
| 3174 | { |
| 3175 | s = strstr (s, from); |
| 3176 | if (s == NULL) |
| 3177 | break; |
| 3178 | |
| 3179 | if ((s == string || IS_DIR_SEPARATOR (s[-1]) |
| 3180 | || s[-1] == DIRNAME_SEPARATOR) |
| 3181 | && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len]) |
| 3182 | || s[from_len] == DIRNAME_SEPARATOR)) |
| 3183 | { |
| 3184 | char *string_new; |
| 3185 | |
| 3186 | string_new |
| 3187 | = (char *) xrealloc (string, (strlen (string) + to_len + 1)); |
| 3188 | |
| 3189 | /* Relocate the current S pointer. */ |
| 3190 | s = s - string + string_new; |
| 3191 | string = string_new; |
| 3192 | |
| 3193 | /* Replace from by to. */ |
| 3194 | memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1); |
| 3195 | memcpy (s, to, to_len); |
| 3196 | |
| 3197 | s += to_len; |
| 3198 | } |
| 3199 | else |
| 3200 | s++; |
| 3201 | } |
| 3202 | |
| 3203 | *stringp = string; |
| 3204 | } |
| 3205 | |
| 3206 | #ifdef HAVE_WAITPID |
| 3207 | |
| 3208 | #ifdef SIGALRM |
| 3209 | |
| 3210 | /* SIGALRM handler for waitpid_with_timeout. */ |
| 3211 | |
| 3212 | static void |
| 3213 | sigalrm_handler (int signo) |
| 3214 | { |
| 3215 | /* Nothing to do. */ |
| 3216 | } |
| 3217 | |
| 3218 | #endif |
| 3219 | |
| 3220 | /* Wrapper to wait for child PID to die with TIMEOUT. |
| 3221 | TIMEOUT is the time to stop waiting in seconds. |
| 3222 | If TIMEOUT is zero, pass WNOHANG to waitpid. |
| 3223 | Returns PID if it was successfully waited for, otherwise -1. |
| 3224 | |
| 3225 | Timeouts are currently implemented with alarm and SIGALRM. |
| 3226 | If the host does not support them, this waits "forever". |
| 3227 | It would be odd though for a host to have waitpid and not SIGALRM. */ |
| 3228 | |
| 3229 | pid_t |
| 3230 | wait_to_die_with_timeout (pid_t pid, int *status, int timeout) |
| 3231 | { |
| 3232 | pid_t waitpid_result; |
| 3233 | |
| 3234 | gdb_assert (pid > 0); |
| 3235 | gdb_assert (timeout >= 0); |
| 3236 | |
| 3237 | if (timeout > 0) |
| 3238 | { |
| 3239 | #ifdef SIGALRM |
| 3240 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 3241 | struct sigaction sa, old_sa; |
| 3242 | |
| 3243 | sa.sa_handler = sigalrm_handler; |
| 3244 | sigemptyset (&sa.sa_mask); |
| 3245 | sa.sa_flags = 0; |
| 3246 | sigaction (SIGALRM, &sa, &old_sa); |
| 3247 | #else |
| 3248 | sighandler_t ofunc; |
| 3249 | |
| 3250 | ofunc = signal (SIGALRM, sigalrm_handler); |
| 3251 | #endif |
| 3252 | |
| 3253 | alarm (timeout); |
| 3254 | #endif |
| 3255 | |
| 3256 | waitpid_result = waitpid (pid, status, 0); |
| 3257 | |
| 3258 | #ifdef SIGALRM |
| 3259 | alarm (0); |
| 3260 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 3261 | sigaction (SIGALRM, &old_sa, NULL); |
| 3262 | #else |
| 3263 | signal (SIGALRM, ofunc); |
| 3264 | #endif |
| 3265 | #endif |
| 3266 | } |
| 3267 | else |
| 3268 | waitpid_result = waitpid (pid, status, WNOHANG); |
| 3269 | |
| 3270 | if (waitpid_result == pid) |
| 3271 | return pid; |
| 3272 | else |
| 3273 | return -1; |
| 3274 | } |
| 3275 | |
| 3276 | #endif /* HAVE_WAITPID */ |
| 3277 | |
| 3278 | /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files. |
| 3279 | Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS. |
| 3280 | |
| 3281 | It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and |
| 3282 | HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */ |
| 3283 | |
| 3284 | int |
| 3285 | gdb_filename_fnmatch (const char *pattern, const char *string, int flags) |
| 3286 | { |
| 3287 | gdb_assert ((flags & FNM_FILE_NAME) != 0); |
| 3288 | |
| 3289 | /* It is unclear how '\' escaping vs. directory separator should coexist. */ |
| 3290 | gdb_assert ((flags & FNM_NOESCAPE) != 0); |
| 3291 | |
| 3292 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 3293 | { |
| 3294 | char *pattern_slash, *string_slash; |
| 3295 | |
| 3296 | /* Replace '\' by '/' in both strings. */ |
| 3297 | |
| 3298 | pattern_slash = (char *) alloca (strlen (pattern) + 1); |
| 3299 | strcpy (pattern_slash, pattern); |
| 3300 | pattern = pattern_slash; |
| 3301 | for (; *pattern_slash != 0; pattern_slash++) |
| 3302 | if (IS_DIR_SEPARATOR (*pattern_slash)) |
| 3303 | *pattern_slash = '/'; |
| 3304 | |
| 3305 | string_slash = (char *) alloca (strlen (string) + 1); |
| 3306 | strcpy (string_slash, string); |
| 3307 | string = string_slash; |
| 3308 | for (; *string_slash != 0; string_slash++) |
| 3309 | if (IS_DIR_SEPARATOR (*string_slash)) |
| 3310 | *string_slash = '/'; |
| 3311 | } |
| 3312 | #endif /* HAVE_DOS_BASED_FILE_SYSTEM */ |
| 3313 | |
| 3314 | #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM |
| 3315 | flags |= FNM_CASEFOLD; |
| 3316 | #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */ |
| 3317 | |
| 3318 | return fnmatch (pattern, string, flags); |
| 3319 | } |
| 3320 | |
| 3321 | /* Return the number of path elements in PATH. |
| 3322 | / = 1 |
| 3323 | /foo = 2 |
| 3324 | /foo/ = 2 |
| 3325 | foo/bar = 2 |
| 3326 | foo/ = 1 */ |
| 3327 | |
| 3328 | int |
| 3329 | count_path_elements (const char *path) |
| 3330 | { |
| 3331 | int count = 0; |
| 3332 | const char *p = path; |
| 3333 | |
| 3334 | if (HAS_DRIVE_SPEC (p)) |
| 3335 | { |
| 3336 | p = STRIP_DRIVE_SPEC (p); |
| 3337 | ++count; |
| 3338 | } |
| 3339 | |
| 3340 | while (*p != '\0') |
| 3341 | { |
| 3342 | if (IS_DIR_SEPARATOR (*p)) |
| 3343 | ++count; |
| 3344 | ++p; |
| 3345 | } |
| 3346 | |
| 3347 | /* Backup one if last character is /, unless it's the only one. */ |
| 3348 | if (p > path + 1 && IS_DIR_SEPARATOR (p[-1])) |
| 3349 | --count; |
| 3350 | |
| 3351 | /* Add one for the file name, if present. */ |
| 3352 | if (p > path && !IS_DIR_SEPARATOR (p[-1])) |
| 3353 | ++count; |
| 3354 | |
| 3355 | return count; |
| 3356 | } |
| 3357 | |
| 3358 | /* Remove N leading path elements from PATH. |
| 3359 | N must be non-negative. |
| 3360 | If PATH has more than N path elements then return NULL. |
| 3361 | If PATH has exactly N path elements then return "". |
| 3362 | See count_path_elements for a description of how we do the counting. */ |
| 3363 | |
| 3364 | const char * |
| 3365 | strip_leading_path_elements (const char *path, int n) |
| 3366 | { |
| 3367 | int i = 0; |
| 3368 | const char *p = path; |
| 3369 | |
| 3370 | gdb_assert (n >= 0); |
| 3371 | |
| 3372 | if (n == 0) |
| 3373 | return p; |
| 3374 | |
| 3375 | if (HAS_DRIVE_SPEC (p)) |
| 3376 | { |
| 3377 | p = STRIP_DRIVE_SPEC (p); |
| 3378 | ++i; |
| 3379 | } |
| 3380 | |
| 3381 | while (i < n) |
| 3382 | { |
| 3383 | while (*p != '\0' && !IS_DIR_SEPARATOR (*p)) |
| 3384 | ++p; |
| 3385 | if (*p == '\0') |
| 3386 | { |
| 3387 | if (i + 1 == n) |
| 3388 | return ""; |
| 3389 | return NULL; |
| 3390 | } |
| 3391 | ++p; |
| 3392 | ++i; |
| 3393 | } |
| 3394 | |
| 3395 | return p; |
| 3396 | } |
| 3397 | |
| 3398 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 3399 | extern initialize_file_ftype _initialize_utils; |
| 3400 | |
| 3401 | void |
| 3402 | _initialize_utils (void) |
| 3403 | { |
| 3404 | add_internal_problem_command (&internal_error_problem); |
| 3405 | add_internal_problem_command (&internal_warning_problem); |
| 3406 | add_internal_problem_command (&demangler_warning_problem); |
| 3407 | } |