| 1 | /* General utility routines for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2019 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 "gdbsupport/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 | #include "gdbsupport/job-control.h" |
| 69 | #include "gdbsupport/selftest.h" |
| 70 | #include "gdbsupport/gdb_optional.h" |
| 71 | #include "cp-support.h" |
| 72 | #include <algorithm> |
| 73 | #include "gdbsupport/pathstuff.h" |
| 74 | #include "cli/cli-style.h" |
| 75 | #include "gdbsupport/scope-exit.h" |
| 76 | #include "gdbarch.h" |
| 77 | |
| 78 | void (*deprecated_error_begin_hook) (void); |
| 79 | |
| 80 | /* Prototypes for local functions */ |
| 81 | |
| 82 | static void vfprintf_maybe_filtered (struct ui_file *, const char *, |
| 83 | va_list, int) ATTRIBUTE_PRINTF (2, 0); |
| 84 | |
| 85 | static void fputs_maybe_filtered (const char *, struct ui_file *, int); |
| 86 | |
| 87 | static void prompt_for_continue (void); |
| 88 | |
| 89 | static void set_screen_size (void); |
| 90 | static void set_width (void); |
| 91 | |
| 92 | /* Time spent in prompt_for_continue in the currently executing command |
| 93 | waiting for user to respond. |
| 94 | Initialized in make_command_stats_cleanup. |
| 95 | Modified in prompt_for_continue and defaulted_query. |
| 96 | Used in report_command_stats. */ |
| 97 | |
| 98 | static std::chrono::steady_clock::duration prompt_for_continue_wait_time; |
| 99 | |
| 100 | /* A flag indicating whether to timestamp debugging messages. */ |
| 101 | |
| 102 | static int debug_timestamp = 0; |
| 103 | |
| 104 | /* Nonzero means that strings with character values >0x7F should be printed |
| 105 | as octal escapes. Zero means just print the value (e.g. it's an |
| 106 | international character, and the terminal or window can cope.) */ |
| 107 | |
| 108 | int sevenbit_strings = 0; |
| 109 | static void |
| 110 | show_sevenbit_strings (struct ui_file *file, int from_tty, |
| 111 | struct cmd_list_element *c, const char *value) |
| 112 | { |
| 113 | fprintf_filtered (file, _("Printing of 8-bit characters " |
| 114 | "in strings as \\nnn is %s.\n"), |
| 115 | value); |
| 116 | } |
| 117 | |
| 118 | /* String to be printed before warning messages, if any. */ |
| 119 | |
| 120 | const char *warning_pre_print = "\nwarning: "; |
| 121 | |
| 122 | int pagination_enabled = 1; |
| 123 | static void |
| 124 | show_pagination_enabled (struct ui_file *file, int from_tty, |
| 125 | struct cmd_list_element *c, const char *value) |
| 126 | { |
| 127 | fprintf_filtered (file, _("State of pagination is %s.\n"), value); |
| 128 | } |
| 129 | |
| 130 | \f |
| 131 | |
| 132 | |
| 133 | /* Print a warning message. The first argument STRING is the warning |
| 134 | message, used as an fprintf format string, the second is the |
| 135 | va_list of arguments for that string. A warning is unfiltered (not |
| 136 | paginated) so that the user does not need to page through each |
| 137 | screen full of warnings when there are lots of them. */ |
| 138 | |
| 139 | void |
| 140 | vwarning (const char *string, va_list args) |
| 141 | { |
| 142 | if (deprecated_warning_hook) |
| 143 | (*deprecated_warning_hook) (string, args); |
| 144 | else |
| 145 | { |
| 146 | gdb::optional<target_terminal::scoped_restore_terminal_state> term_state; |
| 147 | if (target_supports_terminal_ours ()) |
| 148 | { |
| 149 | term_state.emplace (); |
| 150 | target_terminal::ours_for_output (); |
| 151 | } |
| 152 | if (filtered_printing_initialized ()) |
| 153 | wrap_here (""); /* Force out any buffered output. */ |
| 154 | gdb_flush (gdb_stdout); |
| 155 | if (warning_pre_print) |
| 156 | fputs_unfiltered (warning_pre_print, gdb_stderr); |
| 157 | vfprintf_unfiltered (gdb_stderr, string, args); |
| 158 | fprintf_unfiltered (gdb_stderr, "\n"); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* Print an error message and return to command level. |
| 163 | The first argument STRING is the error message, used as a fprintf string, |
| 164 | and the remaining args are passed as arguments to it. */ |
| 165 | |
| 166 | void |
| 167 | verror (const char *string, va_list args) |
| 168 | { |
| 169 | throw_verror (GENERIC_ERROR, string, args); |
| 170 | } |
| 171 | |
| 172 | void |
| 173 | error_stream (const string_file &stream) |
| 174 | { |
| 175 | error (("%s"), stream.c_str ()); |
| 176 | } |
| 177 | |
| 178 | /* Emit a message and abort. */ |
| 179 | |
| 180 | static void ATTRIBUTE_NORETURN |
| 181 | abort_with_message (const char *msg) |
| 182 | { |
| 183 | if (current_ui == NULL) |
| 184 | fputs (msg, stderr); |
| 185 | else |
| 186 | fputs_unfiltered (msg, gdb_stderr); |
| 187 | |
| 188 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 189 | } |
| 190 | |
| 191 | /* Dump core trying to increase the core soft limit to hard limit first. */ |
| 192 | |
| 193 | void |
| 194 | dump_core (void) |
| 195 | { |
| 196 | #ifdef HAVE_SETRLIMIT |
| 197 | struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY }; |
| 198 | |
| 199 | setrlimit (RLIMIT_CORE, &rlim); |
| 200 | #endif /* HAVE_SETRLIMIT */ |
| 201 | |
| 202 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 203 | } |
| 204 | |
| 205 | /* Check whether GDB will be able to dump core using the dump_core |
| 206 | function. Returns zero if GDB cannot or should not dump core. |
| 207 | If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected. |
| 208 | If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */ |
| 209 | |
| 210 | int |
| 211 | can_dump_core (enum resource_limit_kind limit_kind) |
| 212 | { |
| 213 | #ifdef HAVE_GETRLIMIT |
| 214 | struct rlimit rlim; |
| 215 | |
| 216 | /* Be quiet and assume we can dump if an error is returned. */ |
| 217 | if (getrlimit (RLIMIT_CORE, &rlim) != 0) |
| 218 | return 1; |
| 219 | |
| 220 | switch (limit_kind) |
| 221 | { |
| 222 | case LIMIT_CUR: |
| 223 | if (rlim.rlim_cur == 0) |
| 224 | return 0; |
| 225 | /* Fall through. */ |
| 226 | |
| 227 | case LIMIT_MAX: |
| 228 | if (rlim.rlim_max == 0) |
| 229 | return 0; |
| 230 | } |
| 231 | #endif /* HAVE_GETRLIMIT */ |
| 232 | |
| 233 | return 1; |
| 234 | } |
| 235 | |
| 236 | /* Print a warning that we cannot dump core. */ |
| 237 | |
| 238 | void |
| 239 | warn_cant_dump_core (const char *reason) |
| 240 | { |
| 241 | fprintf_unfiltered (gdb_stderr, |
| 242 | _("%s\nUnable to dump core, use `ulimit -c" |
| 243 | " unlimited' before executing GDB next time.\n"), |
| 244 | reason); |
| 245 | } |
| 246 | |
| 247 | /* Check whether GDB will be able to dump core using the dump_core |
| 248 | function, and print a warning if we cannot. */ |
| 249 | |
| 250 | static int |
| 251 | can_dump_core_warn (enum resource_limit_kind limit_kind, |
| 252 | const char *reason) |
| 253 | { |
| 254 | int core_dump_allowed = can_dump_core (limit_kind); |
| 255 | |
| 256 | if (!core_dump_allowed) |
| 257 | warn_cant_dump_core (reason); |
| 258 | |
| 259 | return core_dump_allowed; |
| 260 | } |
| 261 | |
| 262 | /* Allow the user to configure the debugger behavior with respect to |
| 263 | what to do when an internal problem is detected. */ |
| 264 | |
| 265 | const char internal_problem_ask[] = "ask"; |
| 266 | const char internal_problem_yes[] = "yes"; |
| 267 | const char internal_problem_no[] = "no"; |
| 268 | static const char *const internal_problem_modes[] = |
| 269 | { |
| 270 | internal_problem_ask, |
| 271 | internal_problem_yes, |
| 272 | internal_problem_no, |
| 273 | NULL |
| 274 | }; |
| 275 | |
| 276 | /* Print a message reporting an internal error/warning. Ask the user |
| 277 | if they want to continue, dump core, or just exit. Return |
| 278 | something to indicate a quit. */ |
| 279 | |
| 280 | struct internal_problem |
| 281 | { |
| 282 | const char *name; |
| 283 | int user_settable_should_quit; |
| 284 | const char *should_quit; |
| 285 | int user_settable_should_dump_core; |
| 286 | const char *should_dump_core; |
| 287 | }; |
| 288 | |
| 289 | /* Report a problem, internal to GDB, to the user. Once the problem |
| 290 | has been reported, and assuming GDB didn't quit, the caller can |
| 291 | either allow execution to resume or throw an error. */ |
| 292 | |
| 293 | static void ATTRIBUTE_PRINTF (4, 0) |
| 294 | internal_vproblem (struct internal_problem *problem, |
| 295 | const char *file, int line, const char *fmt, va_list ap) |
| 296 | { |
| 297 | static int dejavu; |
| 298 | int quit_p; |
| 299 | int dump_core_p; |
| 300 | std::string reason; |
| 301 | |
| 302 | /* Don't allow infinite error/warning recursion. */ |
| 303 | { |
| 304 | static const char msg[] = "Recursive internal problem.\n"; |
| 305 | |
| 306 | switch (dejavu) |
| 307 | { |
| 308 | case 0: |
| 309 | dejavu = 1; |
| 310 | break; |
| 311 | case 1: |
| 312 | dejavu = 2; |
| 313 | abort_with_message (msg); |
| 314 | default: |
| 315 | dejavu = 3; |
| 316 | /* Newer GLIBC versions put the warn_unused_result attribute |
| 317 | on write, but this is one of those rare cases where |
| 318 | ignoring the return value is correct. Casting to (void) |
| 319 | does not fix this problem. This is the solution suggested |
| 320 | at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */ |
| 321 | if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg)) |
| 322 | abort (); /* NOTE: GDB has only three calls to abort(). */ |
| 323 | exit (1); |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | /* Create a string containing the full error/warning message. Need |
| 328 | to call query with this full string, as otherwize the reason |
| 329 | (error/warning) and question become separated. Format using a |
| 330 | style similar to a compiler error message. Include extra detail |
| 331 | so that the user knows that they are living on the edge. */ |
| 332 | { |
| 333 | std::string msg = string_vprintf (fmt, ap); |
| 334 | reason = string_printf ("%s:%d: %s: %s\n" |
| 335 | "A problem internal to GDB has been detected,\n" |
| 336 | "further debugging may prove unreliable.", |
| 337 | file, line, problem->name, msg.c_str ()); |
| 338 | } |
| 339 | |
| 340 | /* Fall back to abort_with_message if gdb_stderr is not set up. */ |
| 341 | if (current_ui == NULL) |
| 342 | { |
| 343 | fputs (reason.c_str (), stderr); |
| 344 | abort_with_message ("\n"); |
| 345 | } |
| 346 | |
| 347 | /* Try to get the message out and at the start of a new line. */ |
| 348 | gdb::optional<target_terminal::scoped_restore_terminal_state> term_state; |
| 349 | if (target_supports_terminal_ours ()) |
| 350 | { |
| 351 | term_state.emplace (); |
| 352 | target_terminal::ours_for_output (); |
| 353 | } |
| 354 | if (filtered_printing_initialized ()) |
| 355 | begin_line (); |
| 356 | |
| 357 | /* Emit the message unless query will emit it below. */ |
| 358 | if (problem->should_quit != internal_problem_ask |
| 359 | || !confirm |
| 360 | || !filtered_printing_initialized ()) |
| 361 | fprintf_unfiltered (gdb_stderr, "%s\n", reason.c_str ()); |
| 362 | |
| 363 | if (problem->should_quit == internal_problem_ask) |
| 364 | { |
| 365 | /* Default (yes/batch case) is to quit GDB. When in batch mode |
| 366 | this lessens the likelihood of GDB going into an infinite |
| 367 | loop. */ |
| 368 | if (!confirm || !filtered_printing_initialized ()) |
| 369 | quit_p = 1; |
| 370 | else |
| 371 | quit_p = query (_("%s\nQuit this debugging session? "), |
| 372 | reason.c_str ()); |
| 373 | } |
| 374 | else if (problem->should_quit == internal_problem_yes) |
| 375 | quit_p = 1; |
| 376 | else if (problem->should_quit == internal_problem_no) |
| 377 | quit_p = 0; |
| 378 | else |
| 379 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 380 | |
| 381 | fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr); |
| 382 | if (REPORT_BUGS_TO[0]) |
| 383 | fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."), |
| 384 | REPORT_BUGS_TO); |
| 385 | fputs_unfiltered ("\n\n", gdb_stderr); |
| 386 | |
| 387 | if (problem->should_dump_core == internal_problem_ask) |
| 388 | { |
| 389 | if (!can_dump_core_warn (LIMIT_MAX, reason.c_str ())) |
| 390 | dump_core_p = 0; |
| 391 | else if (!filtered_printing_initialized ()) |
| 392 | dump_core_p = 1; |
| 393 | else |
| 394 | { |
| 395 | /* Default (yes/batch case) is to dump core. This leaves a GDB |
| 396 | `dropping' so that it is easier to see that something went |
| 397 | wrong in GDB. */ |
| 398 | dump_core_p = query (_("%s\nCreate a core file of GDB? "), |
| 399 | reason.c_str ()); |
| 400 | } |
| 401 | } |
| 402 | else if (problem->should_dump_core == internal_problem_yes) |
| 403 | dump_core_p = can_dump_core_warn (LIMIT_MAX, reason.c_str ()); |
| 404 | else if (problem->should_dump_core == internal_problem_no) |
| 405 | dump_core_p = 0; |
| 406 | else |
| 407 | internal_error (__FILE__, __LINE__, _("bad switch")); |
| 408 | |
| 409 | if (quit_p) |
| 410 | { |
| 411 | if (dump_core_p) |
| 412 | dump_core (); |
| 413 | else |
| 414 | exit (1); |
| 415 | } |
| 416 | else |
| 417 | { |
| 418 | if (dump_core_p) |
| 419 | { |
| 420 | #ifdef HAVE_WORKING_FORK |
| 421 | if (fork () == 0) |
| 422 | dump_core (); |
| 423 | #endif |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | dejavu = 0; |
| 428 | } |
| 429 | |
| 430 | static struct internal_problem internal_error_problem = { |
| 431 | "internal-error", 1, internal_problem_ask, 1, internal_problem_ask |
| 432 | }; |
| 433 | |
| 434 | void |
| 435 | internal_verror (const char *file, int line, const char *fmt, va_list ap) |
| 436 | { |
| 437 | internal_vproblem (&internal_error_problem, file, line, fmt, ap); |
| 438 | throw_quit (_("Command aborted.")); |
| 439 | } |
| 440 | |
| 441 | static struct internal_problem internal_warning_problem = { |
| 442 | "internal-warning", 1, internal_problem_ask, 1, internal_problem_ask |
| 443 | }; |
| 444 | |
| 445 | void |
| 446 | internal_vwarning (const char *file, int line, const char *fmt, va_list ap) |
| 447 | { |
| 448 | internal_vproblem (&internal_warning_problem, file, line, fmt, ap); |
| 449 | } |
| 450 | |
| 451 | static struct internal_problem demangler_warning_problem = { |
| 452 | "demangler-warning", 1, internal_problem_ask, 0, internal_problem_no |
| 453 | }; |
| 454 | |
| 455 | void |
| 456 | demangler_vwarning (const char *file, int line, const char *fmt, va_list ap) |
| 457 | { |
| 458 | internal_vproblem (&demangler_warning_problem, file, line, fmt, ap); |
| 459 | } |
| 460 | |
| 461 | void |
| 462 | demangler_warning (const char *file, int line, const char *string, ...) |
| 463 | { |
| 464 | va_list ap; |
| 465 | |
| 466 | va_start (ap, string); |
| 467 | demangler_vwarning (file, line, string, ap); |
| 468 | va_end (ap); |
| 469 | } |
| 470 | |
| 471 | /* Dummy functions to keep add_prefix_cmd happy. */ |
| 472 | |
| 473 | static void |
| 474 | set_internal_problem_cmd (const char *args, int from_tty) |
| 475 | { |
| 476 | } |
| 477 | |
| 478 | static void |
| 479 | show_internal_problem_cmd (const char *args, int from_tty) |
| 480 | { |
| 481 | } |
| 482 | |
| 483 | /* When GDB reports an internal problem (error or warning) it gives |
| 484 | the user the opportunity to quit GDB and/or create a core file of |
| 485 | the current debug session. This function registers a few commands |
| 486 | that make it possible to specify that GDB should always or never |
| 487 | quit or create a core file, without asking. The commands look |
| 488 | like: |
| 489 | |
| 490 | maint set PROBLEM-NAME quit ask|yes|no |
| 491 | maint show PROBLEM-NAME quit |
| 492 | maint set PROBLEM-NAME corefile ask|yes|no |
| 493 | maint show PROBLEM-NAME corefile |
| 494 | |
| 495 | Where PROBLEM-NAME is currently "internal-error" or |
| 496 | "internal-warning". */ |
| 497 | |
| 498 | static void |
| 499 | add_internal_problem_command (struct internal_problem *problem) |
| 500 | { |
| 501 | struct cmd_list_element **set_cmd_list; |
| 502 | struct cmd_list_element **show_cmd_list; |
| 503 | char *set_doc; |
| 504 | char *show_doc; |
| 505 | |
| 506 | set_cmd_list = XNEW (struct cmd_list_element *); |
| 507 | show_cmd_list = XNEW (struct cmd_list_element *); |
| 508 | *set_cmd_list = NULL; |
| 509 | *show_cmd_list = NULL; |
| 510 | |
| 511 | set_doc = xstrprintf (_("Configure what GDB does when %s is detected."), |
| 512 | problem->name); |
| 513 | |
| 514 | show_doc = xstrprintf (_("Show what GDB does when %s is detected."), |
| 515 | problem->name); |
| 516 | |
| 517 | add_prefix_cmd (problem->name, |
| 518 | class_maintenance, set_internal_problem_cmd, set_doc, |
| 519 | set_cmd_list, |
| 520 | concat ("maintenance set ", problem->name, " ", |
| 521 | (char *) NULL), |
| 522 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
| 523 | |
| 524 | add_prefix_cmd (problem->name, |
| 525 | class_maintenance, show_internal_problem_cmd, show_doc, |
| 526 | show_cmd_list, |
| 527 | concat ("maintenance show ", problem->name, " ", |
| 528 | (char *) NULL), |
| 529 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
| 530 | |
| 531 | if (problem->user_settable_should_quit) |
| 532 | { |
| 533 | set_doc = xstrprintf (_("Set whether GDB should quit " |
| 534 | "when an %s is detected"), |
| 535 | problem->name); |
| 536 | show_doc = xstrprintf (_("Show whether GDB will quit " |
| 537 | "when an %s is detected"), |
| 538 | problem->name); |
| 539 | add_setshow_enum_cmd ("quit", class_maintenance, |
| 540 | internal_problem_modes, |
| 541 | &problem->should_quit, |
| 542 | set_doc, |
| 543 | show_doc, |
| 544 | NULL, /* help_doc */ |
| 545 | NULL, /* setfunc */ |
| 546 | NULL, /* showfunc */ |
| 547 | set_cmd_list, |
| 548 | show_cmd_list); |
| 549 | |
| 550 | xfree (set_doc); |
| 551 | xfree (show_doc); |
| 552 | } |
| 553 | |
| 554 | if (problem->user_settable_should_dump_core) |
| 555 | { |
| 556 | set_doc = xstrprintf (_("Set whether GDB should create a core " |
| 557 | "file of GDB when %s is detected"), |
| 558 | problem->name); |
| 559 | show_doc = xstrprintf (_("Show whether GDB will create a core " |
| 560 | "file of GDB when %s is detected"), |
| 561 | problem->name); |
| 562 | add_setshow_enum_cmd ("corefile", class_maintenance, |
| 563 | internal_problem_modes, |
| 564 | &problem->should_dump_core, |
| 565 | set_doc, |
| 566 | show_doc, |
| 567 | NULL, /* help_doc */ |
| 568 | NULL, /* setfunc */ |
| 569 | NULL, /* showfunc */ |
| 570 | set_cmd_list, |
| 571 | show_cmd_list); |
| 572 | |
| 573 | xfree (set_doc); |
| 574 | xfree (show_doc); |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* Return a newly allocated string, containing the PREFIX followed |
| 579 | by the system error message for errno (separated by a colon). */ |
| 580 | |
| 581 | static std::string |
| 582 | perror_string (const char *prefix) |
| 583 | { |
| 584 | char *err; |
| 585 | |
| 586 | err = safe_strerror (errno); |
| 587 | return std::string (prefix) + ": " + err; |
| 588 | } |
| 589 | |
| 590 | /* Print the system error message for errno, and also mention STRING |
| 591 | as the file name for which the error was encountered. Use ERRCODE |
| 592 | for the thrown exception. Then return to command level. */ |
| 593 | |
| 594 | void |
| 595 | throw_perror_with_name (enum errors errcode, const char *string) |
| 596 | { |
| 597 | std::string combined = perror_string (string); |
| 598 | |
| 599 | /* I understand setting these is a matter of taste. Still, some people |
| 600 | may clear errno but not know about bfd_error. Doing this here is not |
| 601 | unreasonable. */ |
| 602 | bfd_set_error (bfd_error_no_error); |
| 603 | errno = 0; |
| 604 | |
| 605 | throw_error (errcode, _("%s."), combined.c_str ()); |
| 606 | } |
| 607 | |
| 608 | /* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */ |
| 609 | |
| 610 | void |
| 611 | perror_with_name (const char *string) |
| 612 | { |
| 613 | throw_perror_with_name (GENERIC_ERROR, string); |
| 614 | } |
| 615 | |
| 616 | /* Same as perror_with_name except that it prints a warning instead |
| 617 | of throwing an error. */ |
| 618 | |
| 619 | void |
| 620 | perror_warning_with_name (const char *string) |
| 621 | { |
| 622 | std::string combined = perror_string (string); |
| 623 | warning (_("%s"), combined.c_str ()); |
| 624 | } |
| 625 | |
| 626 | /* Print the system error message for ERRCODE, and also mention STRING |
| 627 | as the file name for which the error was encountered. */ |
| 628 | |
| 629 | void |
| 630 | print_sys_errmsg (const char *string, int errcode) |
| 631 | { |
| 632 | char *err; |
| 633 | char *combined; |
| 634 | |
| 635 | err = safe_strerror (errcode); |
| 636 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
| 637 | strcpy (combined, string); |
| 638 | strcat (combined, ": "); |
| 639 | strcat (combined, err); |
| 640 | |
| 641 | /* We want anything which was printed on stdout to come out first, before |
| 642 | this message. */ |
| 643 | gdb_flush (gdb_stdout); |
| 644 | fprintf_unfiltered (gdb_stderr, "%s.\n", combined); |
| 645 | } |
| 646 | |
| 647 | /* Control C eventually causes this to be called, at a convenient time. */ |
| 648 | |
| 649 | void |
| 650 | quit (void) |
| 651 | { |
| 652 | if (sync_quit_force_run) |
| 653 | { |
| 654 | sync_quit_force_run = 0; |
| 655 | quit_force (NULL, 0); |
| 656 | } |
| 657 | |
| 658 | #ifdef __MSDOS__ |
| 659 | /* No steenking SIGINT will ever be coming our way when the |
| 660 | program is resumed. Don't lie. */ |
| 661 | throw_quit ("Quit"); |
| 662 | #else |
| 663 | if (job_control |
| 664 | /* If there is no terminal switching for this target, then we can't |
| 665 | possibly get screwed by the lack of job control. */ |
| 666 | || !target_supports_terminal_ours ()) |
| 667 | throw_quit ("Quit"); |
| 668 | else |
| 669 | throw_quit ("Quit (expect signal SIGINT when the program is resumed)"); |
| 670 | #endif |
| 671 | } |
| 672 | |
| 673 | /* See defs.h. */ |
| 674 | |
| 675 | void |
| 676 | maybe_quit (void) |
| 677 | { |
| 678 | if (sync_quit_force_run) |
| 679 | quit (); |
| 680 | |
| 681 | quit_handler (); |
| 682 | } |
| 683 | |
| 684 | \f |
| 685 | /* Called when a memory allocation fails, with the number of bytes of |
| 686 | memory requested in SIZE. */ |
| 687 | |
| 688 | void |
| 689 | malloc_failure (long size) |
| 690 | { |
| 691 | if (size > 0) |
| 692 | { |
| 693 | internal_error (__FILE__, __LINE__, |
| 694 | _("virtual memory exhausted: can't allocate %ld bytes."), |
| 695 | size); |
| 696 | } |
| 697 | else |
| 698 | { |
| 699 | internal_error (__FILE__, __LINE__, _("virtual memory exhausted.")); |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | /* My replacement for the read system call. |
| 704 | Used like `read' but keeps going if `read' returns too soon. */ |
| 705 | |
| 706 | int |
| 707 | myread (int desc, char *addr, int len) |
| 708 | { |
| 709 | int val; |
| 710 | int orglen = len; |
| 711 | |
| 712 | while (len > 0) |
| 713 | { |
| 714 | val = read (desc, addr, len); |
| 715 | if (val < 0) |
| 716 | return val; |
| 717 | if (val == 0) |
| 718 | return orglen - len; |
| 719 | len -= val; |
| 720 | addr += val; |
| 721 | } |
| 722 | return orglen; |
| 723 | } |
| 724 | |
| 725 | void |
| 726 | print_spaces (int n, struct ui_file *file) |
| 727 | { |
| 728 | fputs_unfiltered (n_spaces (n), file); |
| 729 | } |
| 730 | |
| 731 | /* Print a host address. */ |
| 732 | |
| 733 | void |
| 734 | gdb_print_host_address_1 (const void *addr, struct ui_file *stream) |
| 735 | { |
| 736 | fprintf_filtered (stream, "%s", host_address_to_string (addr)); |
| 737 | } |
| 738 | |
| 739 | /* See utils.h. */ |
| 740 | |
| 741 | char * |
| 742 | make_hex_string (const gdb_byte *data, size_t length) |
| 743 | { |
| 744 | char *result = (char *) xmalloc (length * 2 + 1); |
| 745 | char *p; |
| 746 | size_t i; |
| 747 | |
| 748 | p = result; |
| 749 | for (i = 0; i < length; ++i) |
| 750 | p += xsnprintf (p, 3, "%02x", data[i]); |
| 751 | *p = '\0'; |
| 752 | return result; |
| 753 | } |
| 754 | |
| 755 | \f |
| 756 | |
| 757 | /* An RAII class that sets up to handle input and then tears down |
| 758 | during destruction. */ |
| 759 | |
| 760 | class scoped_input_handler |
| 761 | { |
| 762 | public: |
| 763 | |
| 764 | scoped_input_handler () |
| 765 | : m_quit_handler (&quit_handler, default_quit_handler), |
| 766 | m_ui (NULL) |
| 767 | { |
| 768 | target_terminal::ours (); |
| 769 | ui_register_input_event_handler (current_ui); |
| 770 | if (current_ui->prompt_state == PROMPT_BLOCKED) |
| 771 | m_ui = current_ui; |
| 772 | } |
| 773 | |
| 774 | ~scoped_input_handler () |
| 775 | { |
| 776 | if (m_ui != NULL) |
| 777 | ui_unregister_input_event_handler (m_ui); |
| 778 | } |
| 779 | |
| 780 | DISABLE_COPY_AND_ASSIGN (scoped_input_handler); |
| 781 | |
| 782 | private: |
| 783 | |
| 784 | /* Save and restore the terminal state. */ |
| 785 | target_terminal::scoped_restore_terminal_state m_term_state; |
| 786 | |
| 787 | /* Save and restore the quit handler. */ |
| 788 | scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler; |
| 789 | |
| 790 | /* The saved UI, if non-NULL. */ |
| 791 | struct ui *m_ui; |
| 792 | }; |
| 793 | |
| 794 | \f |
| 795 | |
| 796 | /* This function supports the query, nquery, and yquery functions. |
| 797 | Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 798 | answer is yes, or default the answer to the specified default |
| 799 | (for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a |
| 800 | default answer, or '\0' for no default. |
| 801 | CTLSTR is the control string and should end in "? ". It should |
| 802 | not say how to answer, because we do that. |
| 803 | ARGS are the arguments passed along with the CTLSTR argument to |
| 804 | printf. */ |
| 805 | |
| 806 | static int ATTRIBUTE_PRINTF (1, 0) |
| 807 | defaulted_query (const char *ctlstr, const char defchar, va_list args) |
| 808 | { |
| 809 | int retval; |
| 810 | int def_value; |
| 811 | char def_answer, not_def_answer; |
| 812 | const char *y_string, *n_string; |
| 813 | |
| 814 | /* Set up according to which answer is the default. */ |
| 815 | if (defchar == '\0') |
| 816 | { |
| 817 | def_value = 1; |
| 818 | def_answer = 'Y'; |
| 819 | not_def_answer = 'N'; |
| 820 | y_string = "y"; |
| 821 | n_string = "n"; |
| 822 | } |
| 823 | else if (defchar == 'y') |
| 824 | { |
| 825 | def_value = 1; |
| 826 | def_answer = 'Y'; |
| 827 | not_def_answer = 'N'; |
| 828 | y_string = "[y]"; |
| 829 | n_string = "n"; |
| 830 | } |
| 831 | else |
| 832 | { |
| 833 | def_value = 0; |
| 834 | def_answer = 'N'; |
| 835 | not_def_answer = 'Y'; |
| 836 | y_string = "y"; |
| 837 | n_string = "[n]"; |
| 838 | } |
| 839 | |
| 840 | /* Automatically answer the default value if the user did not want |
| 841 | prompts or the command was issued with the server prefix. */ |
| 842 | if (!confirm || server_command) |
| 843 | return def_value; |
| 844 | |
| 845 | /* If input isn't coming from the user directly, just say what |
| 846 | question we're asking, and then answer the default automatically. This |
| 847 | way, important error messages don't get lost when talking to GDB |
| 848 | over a pipe. */ |
| 849 | if (current_ui->instream != current_ui->stdin_stream |
| 850 | || !input_interactive_p (current_ui) |
| 851 | /* Restrict queries to the main UI. */ |
| 852 | || current_ui != main_ui) |
| 853 | { |
| 854 | target_terminal::scoped_restore_terminal_state term_state; |
| 855 | target_terminal::ours_for_output (); |
| 856 | wrap_here (""); |
| 857 | vfprintf_filtered (gdb_stdout, ctlstr, args); |
| 858 | |
| 859 | printf_filtered (_("(%s or %s) [answered %c; " |
| 860 | "input not from terminal]\n"), |
| 861 | y_string, n_string, def_answer); |
| 862 | |
| 863 | return def_value; |
| 864 | } |
| 865 | |
| 866 | if (deprecated_query_hook) |
| 867 | { |
| 868 | target_terminal::scoped_restore_terminal_state term_state; |
| 869 | return deprecated_query_hook (ctlstr, args); |
| 870 | } |
| 871 | |
| 872 | /* Format the question outside of the loop, to avoid reusing args. */ |
| 873 | std::string question = string_vprintf (ctlstr, args); |
| 874 | std::string prompt |
| 875 | = string_printf (_("%s%s(%s or %s) %s"), |
| 876 | annotation_level > 1 ? "\n\032\032pre-query\n" : "", |
| 877 | question.c_str (), y_string, n_string, |
| 878 | annotation_level > 1 ? "\n\032\032query\n" : ""); |
| 879 | |
| 880 | /* Used to add duration we waited for user to respond to |
| 881 | prompt_for_continue_wait_time. */ |
| 882 | using namespace std::chrono; |
| 883 | steady_clock::time_point prompt_started = steady_clock::now (); |
| 884 | |
| 885 | scoped_input_handler prepare_input; |
| 886 | |
| 887 | while (1) |
| 888 | { |
| 889 | char *response, answer; |
| 890 | |
| 891 | gdb_flush (gdb_stdout); |
| 892 | response = gdb_readline_wrapper (prompt.c_str ()); |
| 893 | |
| 894 | if (response == NULL) /* C-d */ |
| 895 | { |
| 896 | printf_filtered ("EOF [assumed %c]\n", def_answer); |
| 897 | retval = def_value; |
| 898 | break; |
| 899 | } |
| 900 | |
| 901 | answer = response[0]; |
| 902 | xfree (response); |
| 903 | |
| 904 | if (answer >= 'a') |
| 905 | answer -= 040; |
| 906 | /* Check answer. For the non-default, the user must specify |
| 907 | the non-default explicitly. */ |
| 908 | if (answer == not_def_answer) |
| 909 | { |
| 910 | retval = !def_value; |
| 911 | break; |
| 912 | } |
| 913 | /* Otherwise, if a default was specified, the user may either |
| 914 | specify the required input or have it default by entering |
| 915 | nothing. */ |
| 916 | if (answer == def_answer |
| 917 | || (defchar != '\0' && answer == '\0')) |
| 918 | { |
| 919 | retval = def_value; |
| 920 | break; |
| 921 | } |
| 922 | /* Invalid entries are not defaulted and require another selection. */ |
| 923 | printf_filtered (_("Please answer %s or %s.\n"), |
| 924 | y_string, n_string); |
| 925 | } |
| 926 | |
| 927 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ |
| 928 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; |
| 929 | |
| 930 | if (annotation_level > 1) |
| 931 | printf_filtered (("\n\032\032post-query\n")); |
| 932 | return retval; |
| 933 | } |
| 934 | \f |
| 935 | |
| 936 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 937 | answer is yes, or 0 if answer is defaulted. |
| 938 | Takes three args which are given to printf to print the question. |
| 939 | The first, a control string, should end in "? ". |
| 940 | It should not say how to answer, because we do that. */ |
| 941 | |
| 942 | int |
| 943 | nquery (const char *ctlstr, ...) |
| 944 | { |
| 945 | va_list args; |
| 946 | int ret; |
| 947 | |
| 948 | va_start (args, ctlstr); |
| 949 | ret = defaulted_query (ctlstr, 'n', args); |
| 950 | va_end (args); |
| 951 | return ret; |
| 952 | } |
| 953 | |
| 954 | /* Ask user a y-or-n question and return 0 if answer is no, 1 if |
| 955 | answer is yes, or 1 if answer is defaulted. |
| 956 | Takes three args which are given to printf to print the question. |
| 957 | The first, a control string, should end in "? ". |
| 958 | It should not say how to answer, because we do that. */ |
| 959 | |
| 960 | int |
| 961 | yquery (const char *ctlstr, ...) |
| 962 | { |
| 963 | va_list args; |
| 964 | int ret; |
| 965 | |
| 966 | va_start (args, ctlstr); |
| 967 | ret = defaulted_query (ctlstr, 'y', args); |
| 968 | va_end (args); |
| 969 | return ret; |
| 970 | } |
| 971 | |
| 972 | /* Ask user a y-or-n question and return 1 iff answer is yes. |
| 973 | Takes three args which are given to printf to print the question. |
| 974 | The first, a control string, should end in "? ". |
| 975 | It should not say how to answer, because we do that. */ |
| 976 | |
| 977 | int |
| 978 | query (const char *ctlstr, ...) |
| 979 | { |
| 980 | va_list args; |
| 981 | int ret; |
| 982 | |
| 983 | va_start (args, ctlstr); |
| 984 | ret = defaulted_query (ctlstr, '\0', args); |
| 985 | va_end (args); |
| 986 | return ret; |
| 987 | } |
| 988 | |
| 989 | /* A helper for parse_escape that converts a host character to a |
| 990 | target character. C is the host character. If conversion is |
| 991 | possible, then the target character is stored in *TARGET_C and the |
| 992 | function returns 1. Otherwise, the function returns 0. */ |
| 993 | |
| 994 | static int |
| 995 | host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c) |
| 996 | { |
| 997 | char the_char = c; |
| 998 | int result = 0; |
| 999 | |
| 1000 | auto_obstack host_data; |
| 1001 | |
| 1002 | convert_between_encodings (target_charset (gdbarch), host_charset (), |
| 1003 | (gdb_byte *) &the_char, 1, 1, |
| 1004 | &host_data, translit_none); |
| 1005 | |
| 1006 | if (obstack_object_size (&host_data) == 1) |
| 1007 | { |
| 1008 | result = 1; |
| 1009 | *target_c = *(char *) obstack_base (&host_data); |
| 1010 | } |
| 1011 | |
| 1012 | return result; |
| 1013 | } |
| 1014 | |
| 1015 | /* Parse a C escape sequence. STRING_PTR points to a variable |
| 1016 | containing a pointer to the string to parse. That pointer |
| 1017 | should point to the character after the \. That pointer |
| 1018 | is updated past the characters we use. The value of the |
| 1019 | escape sequence is returned. |
| 1020 | |
| 1021 | A negative value means the sequence \ newline was seen, |
| 1022 | which is supposed to be equivalent to nothing at all. |
| 1023 | |
| 1024 | If \ is followed by a null character, we return a negative |
| 1025 | value and leave the string pointer pointing at the null character. |
| 1026 | |
| 1027 | If \ is followed by 000, we return 0 and leave the string pointer |
| 1028 | after the zeros. A value of 0 does not mean end of string. */ |
| 1029 | |
| 1030 | int |
| 1031 | parse_escape (struct gdbarch *gdbarch, const char **string_ptr) |
| 1032 | { |
| 1033 | int target_char = -2; /* Initialize to avoid GCC warnings. */ |
| 1034 | int c = *(*string_ptr)++; |
| 1035 | |
| 1036 | switch (c) |
| 1037 | { |
| 1038 | case '\n': |
| 1039 | return -2; |
| 1040 | case 0: |
| 1041 | (*string_ptr)--; |
| 1042 | return 0; |
| 1043 | |
| 1044 | case '0': |
| 1045 | case '1': |
| 1046 | case '2': |
| 1047 | case '3': |
| 1048 | case '4': |
| 1049 | case '5': |
| 1050 | case '6': |
| 1051 | case '7': |
| 1052 | { |
| 1053 | int i = host_hex_value (c); |
| 1054 | int count = 0; |
| 1055 | while (++count < 3) |
| 1056 | { |
| 1057 | c = (**string_ptr); |
| 1058 | if (isdigit (c) && c != '8' && c != '9') |
| 1059 | { |
| 1060 | (*string_ptr)++; |
| 1061 | i *= 8; |
| 1062 | i += host_hex_value (c); |
| 1063 | } |
| 1064 | else |
| 1065 | { |
| 1066 | break; |
| 1067 | } |
| 1068 | } |
| 1069 | return i; |
| 1070 | } |
| 1071 | |
| 1072 | case 'a': |
| 1073 | c = '\a'; |
| 1074 | break; |
| 1075 | case 'b': |
| 1076 | c = '\b'; |
| 1077 | break; |
| 1078 | case 'f': |
| 1079 | c = '\f'; |
| 1080 | break; |
| 1081 | case 'n': |
| 1082 | c = '\n'; |
| 1083 | break; |
| 1084 | case 'r': |
| 1085 | c = '\r'; |
| 1086 | break; |
| 1087 | case 't': |
| 1088 | c = '\t'; |
| 1089 | break; |
| 1090 | case 'v': |
| 1091 | c = '\v'; |
| 1092 | break; |
| 1093 | |
| 1094 | default: |
| 1095 | break; |
| 1096 | } |
| 1097 | |
| 1098 | if (!host_char_to_target (gdbarch, c, &target_char)) |
| 1099 | error (_("The escape sequence `\\%c' is equivalent to plain `%c'," |
| 1100 | " which has no equivalent\nin the `%s' character set."), |
| 1101 | c, c, target_charset (gdbarch)); |
| 1102 | return target_char; |
| 1103 | } |
| 1104 | \f |
| 1105 | /* Print the character C on STREAM as part of the contents of a literal |
| 1106 | string whose delimiter is QUOTER. Note that this routine should only |
| 1107 | be called for printing things which are independent of the language |
| 1108 | of the program being debugged. |
| 1109 | |
| 1110 | printchar will normally escape backslashes and instances of QUOTER. If |
| 1111 | QUOTER is 0, printchar won't escape backslashes or any quoting character. |
| 1112 | As a side effect, if you pass the backslash character as the QUOTER, |
| 1113 | printchar will escape backslashes as usual, but not any other quoting |
| 1114 | character. */ |
| 1115 | |
| 1116 | static void |
| 1117 | printchar (int c, do_fputc_ftype do_fputc, ui_file *stream, int quoter) |
| 1118 | { |
| 1119 | c &= 0xFF; /* Avoid sign bit follies */ |
| 1120 | |
| 1121 | if (c < 0x20 || /* Low control chars */ |
| 1122 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ |
| 1123 | (sevenbit_strings && c >= 0x80)) |
| 1124 | { /* high order bit set */ |
| 1125 | do_fputc ('\\', stream); |
| 1126 | |
| 1127 | switch (c) |
| 1128 | { |
| 1129 | case '\n': |
| 1130 | do_fputc ('n', stream); |
| 1131 | break; |
| 1132 | case '\b': |
| 1133 | do_fputc ('b', stream); |
| 1134 | break; |
| 1135 | case '\t': |
| 1136 | do_fputc ('t', stream); |
| 1137 | break; |
| 1138 | case '\f': |
| 1139 | do_fputc ('f', stream); |
| 1140 | break; |
| 1141 | case '\r': |
| 1142 | do_fputc ('r', stream); |
| 1143 | break; |
| 1144 | case '\033': |
| 1145 | do_fputc ('e', stream); |
| 1146 | break; |
| 1147 | case '\007': |
| 1148 | do_fputc ('a', stream); |
| 1149 | break; |
| 1150 | default: |
| 1151 | { |
| 1152 | do_fputc ('0' + ((c >> 6) & 0x7), stream); |
| 1153 | do_fputc ('0' + ((c >> 3) & 0x7), stream); |
| 1154 | do_fputc ('0' + ((c >> 0) & 0x7), stream); |
| 1155 | break; |
| 1156 | } |
| 1157 | } |
| 1158 | } |
| 1159 | else |
| 1160 | { |
| 1161 | if (quoter != 0 && (c == '\\' || c == quoter)) |
| 1162 | do_fputc ('\\', stream); |
| 1163 | do_fputc (c, stream); |
| 1164 | } |
| 1165 | } |
| 1166 | |
| 1167 | /* Print the character C on STREAM as part of the contents of a |
| 1168 | literal string whose delimiter is QUOTER. Note that these routines |
| 1169 | should only be call for printing things which are independent of |
| 1170 | the language of the program being debugged. */ |
| 1171 | |
| 1172 | void |
| 1173 | fputstr_filtered (const char *str, int quoter, struct ui_file *stream) |
| 1174 | { |
| 1175 | while (*str) |
| 1176 | printchar (*str++, fputc_filtered, stream, quoter); |
| 1177 | } |
| 1178 | |
| 1179 | void |
| 1180 | fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream) |
| 1181 | { |
| 1182 | while (*str) |
| 1183 | printchar (*str++, fputc_unfiltered, stream, quoter); |
| 1184 | } |
| 1185 | |
| 1186 | void |
| 1187 | fputstrn_filtered (const char *str, int n, int quoter, |
| 1188 | struct ui_file *stream) |
| 1189 | { |
| 1190 | for (int i = 0; i < n; i++) |
| 1191 | printchar (str[i], fputc_filtered, stream, quoter); |
| 1192 | } |
| 1193 | |
| 1194 | void |
| 1195 | fputstrn_unfiltered (const char *str, int n, int quoter, |
| 1196 | do_fputc_ftype do_fputc, struct ui_file *stream) |
| 1197 | { |
| 1198 | for (int i = 0; i < n; i++) |
| 1199 | printchar (str[i], do_fputc, stream, quoter); |
| 1200 | } |
| 1201 | \f |
| 1202 | |
| 1203 | /* Number of lines per page or UINT_MAX if paging is disabled. */ |
| 1204 | static unsigned int lines_per_page; |
| 1205 | static void |
| 1206 | show_lines_per_page (struct ui_file *file, int from_tty, |
| 1207 | struct cmd_list_element *c, const char *value) |
| 1208 | { |
| 1209 | fprintf_filtered (file, |
| 1210 | _("Number of lines gdb thinks are in a page is %s.\n"), |
| 1211 | value); |
| 1212 | } |
| 1213 | |
| 1214 | /* Number of chars per line or UINT_MAX if line folding is disabled. */ |
| 1215 | static unsigned int chars_per_line; |
| 1216 | static void |
| 1217 | show_chars_per_line (struct ui_file *file, int from_tty, |
| 1218 | struct cmd_list_element *c, const char *value) |
| 1219 | { |
| 1220 | fprintf_filtered (file, |
| 1221 | _("Number of characters gdb thinks " |
| 1222 | "are in a line is %s.\n"), |
| 1223 | value); |
| 1224 | } |
| 1225 | |
| 1226 | /* Current count of lines printed on this page, chars on this line. */ |
| 1227 | static unsigned int lines_printed, chars_printed; |
| 1228 | |
| 1229 | /* True if pagination is disabled for just one command. */ |
| 1230 | |
| 1231 | static bool pagination_disabled_for_command; |
| 1232 | |
| 1233 | /* Buffer and start column of buffered text, for doing smarter word- |
| 1234 | wrapping. When someone calls wrap_here(), we start buffering output |
| 1235 | that comes through fputs_filtered(). If we see a newline, we just |
| 1236 | spit it out and forget about the wrap_here(). If we see another |
| 1237 | wrap_here(), we spit it out and remember the newer one. If we see |
| 1238 | the end of the line, we spit out a newline, the indent, and then |
| 1239 | the buffered output. */ |
| 1240 | |
| 1241 | static bool filter_initialized = false; |
| 1242 | |
| 1243 | /* Contains characters which are waiting to be output (they have |
| 1244 | already been counted in chars_printed). */ |
| 1245 | static std::string wrap_buffer; |
| 1246 | |
| 1247 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column |
| 1248 | is non-zero. */ |
| 1249 | static const char *wrap_indent; |
| 1250 | |
| 1251 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping |
| 1252 | is not in effect. */ |
| 1253 | static int wrap_column; |
| 1254 | |
| 1255 | /* The style applied at the time that wrap_here was called. */ |
| 1256 | static ui_file_style wrap_style; |
| 1257 | \f |
| 1258 | |
| 1259 | /* Initialize the number of lines per page and chars per line. */ |
| 1260 | |
| 1261 | void |
| 1262 | init_page_info (void) |
| 1263 | { |
| 1264 | if (batch_flag) |
| 1265 | { |
| 1266 | lines_per_page = UINT_MAX; |
| 1267 | chars_per_line = UINT_MAX; |
| 1268 | } |
| 1269 | else |
| 1270 | #if defined(TUI) |
| 1271 | if (!tui_get_command_dimension (&chars_per_line, &lines_per_page)) |
| 1272 | #endif |
| 1273 | { |
| 1274 | int rows, cols; |
| 1275 | |
| 1276 | #if defined(__GO32__) |
| 1277 | rows = ScreenRows (); |
| 1278 | cols = ScreenCols (); |
| 1279 | lines_per_page = rows; |
| 1280 | chars_per_line = cols; |
| 1281 | #else |
| 1282 | /* Make sure Readline has initialized its terminal settings. */ |
| 1283 | rl_reset_terminal (NULL); |
| 1284 | |
| 1285 | /* Get the screen size from Readline. */ |
| 1286 | rl_get_screen_size (&rows, &cols); |
| 1287 | lines_per_page = rows; |
| 1288 | chars_per_line = cols; |
| 1289 | |
| 1290 | /* Readline should have fetched the termcap entry for us. |
| 1291 | Only try to use tgetnum function if rl_get_screen_size |
| 1292 | did not return a useful value. */ |
| 1293 | if (((rows <= 0) && (tgetnum ((char *) "li") < 0)) |
| 1294 | /* Also disable paging if inside Emacs. $EMACS was used |
| 1295 | before Emacs v25.1, $INSIDE_EMACS is used since then. */ |
| 1296 | || getenv ("EMACS") || getenv ("INSIDE_EMACS")) |
| 1297 | { |
| 1298 | /* The number of lines per page is not mentioned in the terminal |
| 1299 | description or EMACS evironment variable is set. This probably |
| 1300 | means that paging is not useful, so disable paging. */ |
| 1301 | lines_per_page = UINT_MAX; |
| 1302 | } |
| 1303 | |
| 1304 | /* If the output is not a terminal, don't paginate it. */ |
| 1305 | if (!ui_file_isatty (gdb_stdout)) |
| 1306 | lines_per_page = UINT_MAX; |
| 1307 | #endif |
| 1308 | } |
| 1309 | |
| 1310 | /* We handle SIGWINCH ourselves. */ |
| 1311 | rl_catch_sigwinch = 0; |
| 1312 | |
| 1313 | set_screen_size (); |
| 1314 | set_width (); |
| 1315 | } |
| 1316 | |
| 1317 | /* Return nonzero if filtered printing is initialized. */ |
| 1318 | int |
| 1319 | filtered_printing_initialized (void) |
| 1320 | { |
| 1321 | return filter_initialized; |
| 1322 | } |
| 1323 | |
| 1324 | set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info () |
| 1325 | : m_save_lines_per_page (lines_per_page), |
| 1326 | m_save_chars_per_line (chars_per_line), |
| 1327 | m_save_batch_flag (batch_flag) |
| 1328 | { |
| 1329 | batch_flag = 1; |
| 1330 | init_page_info (); |
| 1331 | } |
| 1332 | |
| 1333 | set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info () |
| 1334 | { |
| 1335 | batch_flag = m_save_batch_flag; |
| 1336 | chars_per_line = m_save_chars_per_line; |
| 1337 | lines_per_page = m_save_lines_per_page; |
| 1338 | |
| 1339 | set_screen_size (); |
| 1340 | set_width (); |
| 1341 | } |
| 1342 | |
| 1343 | /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */ |
| 1344 | |
| 1345 | static void |
| 1346 | set_screen_size (void) |
| 1347 | { |
| 1348 | int rows = lines_per_page; |
| 1349 | int cols = chars_per_line; |
| 1350 | |
| 1351 | /* If we get 0 or negative ROWS or COLS, treat as "infinite" size. |
| 1352 | A negative number can be seen here with the "set width/height" |
| 1353 | commands and either: |
| 1354 | |
| 1355 | - the user specified "unlimited", which maps to UINT_MAX, or |
| 1356 | - the user spedified some number between INT_MAX and UINT_MAX. |
| 1357 | |
| 1358 | Cap "infinity" to approximately sqrt(INT_MAX) so that we don't |
| 1359 | overflow in rl_set_screen_size, which multiplies rows and columns |
| 1360 | to compute the number of characters on the screen. */ |
| 1361 | |
| 1362 | const int sqrt_int_max = INT_MAX >> (sizeof (int) * 8 / 2); |
| 1363 | |
| 1364 | if (rows <= 0 || rows > sqrt_int_max) |
| 1365 | { |
| 1366 | rows = sqrt_int_max; |
| 1367 | lines_per_page = UINT_MAX; |
| 1368 | } |
| 1369 | |
| 1370 | if (cols <= 0 || cols > sqrt_int_max) |
| 1371 | { |
| 1372 | cols = sqrt_int_max; |
| 1373 | chars_per_line = UINT_MAX; |
| 1374 | } |
| 1375 | |
| 1376 | /* Update Readline's idea of the terminal size. */ |
| 1377 | rl_set_screen_size (rows, cols); |
| 1378 | } |
| 1379 | |
| 1380 | /* Reinitialize WRAP_BUFFER. */ |
| 1381 | |
| 1382 | static void |
| 1383 | set_width (void) |
| 1384 | { |
| 1385 | if (chars_per_line == 0) |
| 1386 | init_page_info (); |
| 1387 | |
| 1388 | wrap_buffer.clear (); |
| 1389 | filter_initialized = true; |
| 1390 | } |
| 1391 | |
| 1392 | static void |
| 1393 | set_width_command (const char *args, int from_tty, struct cmd_list_element *c) |
| 1394 | { |
| 1395 | set_screen_size (); |
| 1396 | set_width (); |
| 1397 | } |
| 1398 | |
| 1399 | static void |
| 1400 | set_height_command (const char *args, int from_tty, struct cmd_list_element *c) |
| 1401 | { |
| 1402 | set_screen_size (); |
| 1403 | } |
| 1404 | |
| 1405 | /* See utils.h. */ |
| 1406 | |
| 1407 | void |
| 1408 | set_screen_width_and_height (int width, int height) |
| 1409 | { |
| 1410 | lines_per_page = height; |
| 1411 | chars_per_line = width; |
| 1412 | |
| 1413 | set_screen_size (); |
| 1414 | set_width (); |
| 1415 | } |
| 1416 | |
| 1417 | /* The currently applied style. */ |
| 1418 | |
| 1419 | static ui_file_style applied_style; |
| 1420 | |
| 1421 | /* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to |
| 1422 | the wrap buffer; otherwise emit to STREAM. */ |
| 1423 | |
| 1424 | static void |
| 1425 | emit_style_escape (const ui_file_style &style, |
| 1426 | struct ui_file *stream = nullptr) |
| 1427 | { |
| 1428 | applied_style = style; |
| 1429 | |
| 1430 | if (stream == nullptr) |
| 1431 | wrap_buffer.append (style.to_ansi ()); |
| 1432 | else |
| 1433 | fputs_unfiltered (style.to_ansi ().c_str (), stream); |
| 1434 | } |
| 1435 | |
| 1436 | /* Set the current output style. This will affect future uses of the |
| 1437 | _filtered output functions. */ |
| 1438 | |
| 1439 | static void |
| 1440 | set_output_style (struct ui_file *stream, const ui_file_style &style) |
| 1441 | { |
| 1442 | if (!stream->can_emit_style_escape ()) |
| 1443 | return; |
| 1444 | |
| 1445 | /* Note that we don't pass STREAM here, because we want to emit to |
| 1446 | the wrap buffer, not directly to STREAM. */ |
| 1447 | emit_style_escape (style); |
| 1448 | } |
| 1449 | |
| 1450 | /* See utils.h. */ |
| 1451 | |
| 1452 | void |
| 1453 | reset_terminal_style (struct ui_file *stream) |
| 1454 | { |
| 1455 | if (stream->can_emit_style_escape ()) |
| 1456 | { |
| 1457 | /* Force the setting, regardless of what we think the setting |
| 1458 | might already be. */ |
| 1459 | applied_style = ui_file_style (); |
| 1460 | wrap_buffer.append (applied_style.to_ansi ()); |
| 1461 | } |
| 1462 | } |
| 1463 | |
| 1464 | /* Wait, so the user can read what's on the screen. Prompt the user |
| 1465 | to continue by pressing RETURN. 'q' is also provided because |
| 1466 | telling users what to do in the prompt is more user-friendly than |
| 1467 | expecting them to think of Ctrl-C/SIGINT. */ |
| 1468 | |
| 1469 | static void |
| 1470 | prompt_for_continue (void) |
| 1471 | { |
| 1472 | char cont_prompt[120]; |
| 1473 | /* Used to add duration we waited for user to respond to |
| 1474 | prompt_for_continue_wait_time. */ |
| 1475 | using namespace std::chrono; |
| 1476 | steady_clock::time_point prompt_started = steady_clock::now (); |
| 1477 | bool disable_pagination = pagination_disabled_for_command; |
| 1478 | |
| 1479 | /* Clear the current styling. */ |
| 1480 | if (gdb_stdout->can_emit_style_escape ()) |
| 1481 | emit_style_escape (ui_file_style (), gdb_stdout); |
| 1482 | |
| 1483 | if (annotation_level > 1) |
| 1484 | printf_unfiltered (("\n\032\032pre-prompt-for-continue\n")); |
| 1485 | |
| 1486 | strcpy (cont_prompt, |
| 1487 | "--Type <RET> for more, q to quit, " |
| 1488 | "c to continue without paging--"); |
| 1489 | if (annotation_level > 1) |
| 1490 | strcat (cont_prompt, "\n\032\032prompt-for-continue\n"); |
| 1491 | |
| 1492 | /* We must do this *before* we call gdb_readline_wrapper, else it |
| 1493 | will eventually call us -- thinking that we're trying to print |
| 1494 | beyond the end of the screen. */ |
| 1495 | reinitialize_more_filter (); |
| 1496 | |
| 1497 | scoped_input_handler prepare_input; |
| 1498 | |
| 1499 | /* Call gdb_readline_wrapper, not readline, in order to keep an |
| 1500 | event loop running. */ |
| 1501 | gdb::unique_xmalloc_ptr<char> ignore (gdb_readline_wrapper (cont_prompt)); |
| 1502 | |
| 1503 | /* Add time spend in this routine to prompt_for_continue_wait_time. */ |
| 1504 | prompt_for_continue_wait_time += steady_clock::now () - prompt_started; |
| 1505 | |
| 1506 | if (annotation_level > 1) |
| 1507 | printf_unfiltered (("\n\032\032post-prompt-for-continue\n")); |
| 1508 | |
| 1509 | if (ignore != NULL) |
| 1510 | { |
| 1511 | char *p = ignore.get (); |
| 1512 | |
| 1513 | while (*p == ' ' || *p == '\t') |
| 1514 | ++p; |
| 1515 | if (p[0] == 'q') |
| 1516 | /* Do not call quit here; there is no possibility of SIGINT. */ |
| 1517 | throw_quit ("Quit"); |
| 1518 | if (p[0] == 'c') |
| 1519 | disable_pagination = true; |
| 1520 | } |
| 1521 | |
| 1522 | /* Now we have to do this again, so that GDB will know that it doesn't |
| 1523 | need to save the ---Type <return>--- line at the top of the screen. */ |
| 1524 | reinitialize_more_filter (); |
| 1525 | pagination_disabled_for_command = disable_pagination; |
| 1526 | |
| 1527 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
| 1528 | } |
| 1529 | |
| 1530 | /* Initialize timer to keep track of how long we waited for the user. */ |
| 1531 | |
| 1532 | void |
| 1533 | reset_prompt_for_continue_wait_time (void) |
| 1534 | { |
| 1535 | using namespace std::chrono; |
| 1536 | |
| 1537 | prompt_for_continue_wait_time = steady_clock::duration::zero (); |
| 1538 | } |
| 1539 | |
| 1540 | /* Fetch the cumulative time spent in prompt_for_continue. */ |
| 1541 | |
| 1542 | std::chrono::steady_clock::duration |
| 1543 | get_prompt_for_continue_wait_time () |
| 1544 | { |
| 1545 | return prompt_for_continue_wait_time; |
| 1546 | } |
| 1547 | |
| 1548 | /* Reinitialize filter; ie. tell it to reset to original values. */ |
| 1549 | |
| 1550 | void |
| 1551 | reinitialize_more_filter (void) |
| 1552 | { |
| 1553 | lines_printed = 0; |
| 1554 | chars_printed = 0; |
| 1555 | pagination_disabled_for_command = false; |
| 1556 | } |
| 1557 | |
| 1558 | /* Flush the wrap buffer to STREAM, if necessary. */ |
| 1559 | |
| 1560 | static void |
| 1561 | flush_wrap_buffer (struct ui_file *stream) |
| 1562 | { |
| 1563 | if (stream == gdb_stdout && !wrap_buffer.empty ()) |
| 1564 | { |
| 1565 | fputs_unfiltered (wrap_buffer.c_str (), stream); |
| 1566 | wrap_buffer.clear (); |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | /* Indicate that if the next sequence of characters overflows the line, |
| 1571 | a newline should be inserted here rather than when it hits the end. |
| 1572 | If INDENT is non-null, it is a string to be printed to indent the |
| 1573 | wrapped part on the next line. INDENT must remain accessible until |
| 1574 | the next call to wrap_here() or until a newline is printed through |
| 1575 | fputs_filtered(). |
| 1576 | |
| 1577 | If the line is already overfull, we immediately print a newline and |
| 1578 | the indentation, and disable further wrapping. |
| 1579 | |
| 1580 | If we don't know the width of lines, but we know the page height, |
| 1581 | we must not wrap words, but should still keep track of newlines |
| 1582 | that were explicitly printed. |
| 1583 | |
| 1584 | INDENT should not contain tabs, as that will mess up the char count |
| 1585 | on the next line. FIXME. |
| 1586 | |
| 1587 | This routine is guaranteed to force out any output which has been |
| 1588 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be |
| 1589 | used to force out output from the wrap_buffer. */ |
| 1590 | |
| 1591 | void |
| 1592 | wrap_here (const char *indent) |
| 1593 | { |
| 1594 | /* This should have been allocated, but be paranoid anyway. */ |
| 1595 | if (!filter_initialized) |
| 1596 | internal_error (__FILE__, __LINE__, |
| 1597 | _("failed internal consistency check")); |
| 1598 | |
| 1599 | flush_wrap_buffer (gdb_stdout); |
| 1600 | if (chars_per_line == UINT_MAX) /* No line overflow checking. */ |
| 1601 | { |
| 1602 | wrap_column = 0; |
| 1603 | } |
| 1604 | else if (chars_printed >= chars_per_line) |
| 1605 | { |
| 1606 | puts_filtered ("\n"); |
| 1607 | if (indent != NULL) |
| 1608 | puts_filtered (indent); |
| 1609 | wrap_column = 0; |
| 1610 | } |
| 1611 | else |
| 1612 | { |
| 1613 | wrap_column = chars_printed; |
| 1614 | if (indent == NULL) |
| 1615 | wrap_indent = ""; |
| 1616 | else |
| 1617 | wrap_indent = indent; |
| 1618 | wrap_style = applied_style; |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | /* Print input string to gdb_stdout, filtered, with wrap, |
| 1623 | arranging strings in columns of n chars. String can be |
| 1624 | right or left justified in the column. Never prints |
| 1625 | trailing spaces. String should never be longer than |
| 1626 | width. FIXME: this could be useful for the EXAMINE |
| 1627 | command, which currently doesn't tabulate very well. */ |
| 1628 | |
| 1629 | void |
| 1630 | puts_filtered_tabular (char *string, int width, int right) |
| 1631 | { |
| 1632 | int spaces = 0; |
| 1633 | int stringlen; |
| 1634 | char *spacebuf; |
| 1635 | |
| 1636 | gdb_assert (chars_per_line > 0); |
| 1637 | if (chars_per_line == UINT_MAX) |
| 1638 | { |
| 1639 | fputs_filtered (string, gdb_stdout); |
| 1640 | fputs_filtered ("\n", gdb_stdout); |
| 1641 | return; |
| 1642 | } |
| 1643 | |
| 1644 | if (((chars_printed - 1) / width + 2) * width >= chars_per_line) |
| 1645 | fputs_filtered ("\n", gdb_stdout); |
| 1646 | |
| 1647 | if (width >= chars_per_line) |
| 1648 | width = chars_per_line - 1; |
| 1649 | |
| 1650 | stringlen = strlen (string); |
| 1651 | |
| 1652 | if (chars_printed > 0) |
| 1653 | spaces = width - (chars_printed - 1) % width - 1; |
| 1654 | if (right) |
| 1655 | spaces += width - stringlen; |
| 1656 | |
| 1657 | spacebuf = (char *) alloca (spaces + 1); |
| 1658 | spacebuf[spaces] = '\0'; |
| 1659 | while (spaces--) |
| 1660 | spacebuf[spaces] = ' '; |
| 1661 | |
| 1662 | fputs_filtered (spacebuf, gdb_stdout); |
| 1663 | fputs_filtered (string, gdb_stdout); |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | /* Ensure that whatever gets printed next, using the filtered output |
| 1668 | commands, starts at the beginning of the line. I.e. if there is |
| 1669 | any pending output for the current line, flush it and start a new |
| 1670 | line. Otherwise do nothing. */ |
| 1671 | |
| 1672 | void |
| 1673 | begin_line (void) |
| 1674 | { |
| 1675 | if (chars_printed > 0) |
| 1676 | { |
| 1677 | puts_filtered ("\n"); |
| 1678 | } |
| 1679 | } |
| 1680 | |
| 1681 | |
| 1682 | /* Like fputs but if FILTER is true, pause after every screenful. |
| 1683 | |
| 1684 | Regardless of FILTER can wrap at points other than the final |
| 1685 | character of a line. |
| 1686 | |
| 1687 | Unlike fputs, fputs_maybe_filtered does not return a value. |
| 1688 | It is OK for LINEBUFFER to be NULL, in which case just don't print |
| 1689 | anything. |
| 1690 | |
| 1691 | Note that a longjmp to top level may occur in this routine (only if |
| 1692 | FILTER is true) (since prompt_for_continue may do so) so this |
| 1693 | routine should not be called when cleanups are not in place. */ |
| 1694 | |
| 1695 | static void |
| 1696 | fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream, |
| 1697 | int filter) |
| 1698 | { |
| 1699 | const char *lineptr; |
| 1700 | |
| 1701 | if (linebuffer == 0) |
| 1702 | return; |
| 1703 | |
| 1704 | /* Don't do any filtering if it is disabled. */ |
| 1705 | if (stream != gdb_stdout |
| 1706 | || !pagination_enabled |
| 1707 | || pagination_disabled_for_command |
| 1708 | || batch_flag |
| 1709 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX) |
| 1710 | || top_level_interpreter () == NULL |
| 1711 | || top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ()) |
| 1712 | { |
| 1713 | flush_wrap_buffer (stream); |
| 1714 | fputs_unfiltered (linebuffer, stream); |
| 1715 | return; |
| 1716 | } |
| 1717 | |
| 1718 | auto buffer_clearer |
| 1719 | = make_scope_exit ([&] () |
| 1720 | { |
| 1721 | wrap_buffer.clear (); |
| 1722 | wrap_column = 0; |
| 1723 | wrap_indent = ""; |
| 1724 | }); |
| 1725 | |
| 1726 | /* Go through and output each character. Show line extension |
| 1727 | when this is necessary; prompt user for new page when this is |
| 1728 | necessary. */ |
| 1729 | |
| 1730 | lineptr = linebuffer; |
| 1731 | while (*lineptr) |
| 1732 | { |
| 1733 | /* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND |
| 1734 | might be set during this loop, so we must continue to check |
| 1735 | it here. */ |
| 1736 | if (filter && (lines_printed >= lines_per_page - 1) |
| 1737 | && !pagination_disabled_for_command) |
| 1738 | prompt_for_continue (); |
| 1739 | |
| 1740 | while (*lineptr && *lineptr != '\n') |
| 1741 | { |
| 1742 | int skip_bytes; |
| 1743 | |
| 1744 | /* Print a single line. */ |
| 1745 | if (*lineptr == '\t') |
| 1746 | { |
| 1747 | wrap_buffer.push_back ('\t'); |
| 1748 | /* Shifting right by 3 produces the number of tab stops |
| 1749 | we have already passed, and then adding one and |
| 1750 | shifting left 3 advances to the next tab stop. */ |
| 1751 | chars_printed = ((chars_printed >> 3) + 1) << 3; |
| 1752 | lineptr++; |
| 1753 | } |
| 1754 | else if (*lineptr == '\033' |
| 1755 | && skip_ansi_escape (lineptr, &skip_bytes)) |
| 1756 | { |
| 1757 | wrap_buffer.append (lineptr, skip_bytes); |
| 1758 | /* Note that we don't consider this a character, so we |
| 1759 | don't increment chars_printed here. */ |
| 1760 | lineptr += skip_bytes; |
| 1761 | } |
| 1762 | else |
| 1763 | { |
| 1764 | wrap_buffer.push_back (*lineptr); |
| 1765 | chars_printed++; |
| 1766 | lineptr++; |
| 1767 | } |
| 1768 | |
| 1769 | if (chars_printed >= chars_per_line) |
| 1770 | { |
| 1771 | unsigned int save_chars = chars_printed; |
| 1772 | |
| 1773 | /* If we change the style, below, we'll want to reset it |
| 1774 | before continuing to print. If there is no wrap |
| 1775 | column, then we'll only reset the style if the pager |
| 1776 | prompt is given; and to avoid emitting style |
| 1777 | sequences in the middle of a run of text, we track |
| 1778 | this as well. */ |
| 1779 | ui_file_style save_style; |
| 1780 | bool did_paginate = false; |
| 1781 | |
| 1782 | chars_printed = 0; |
| 1783 | lines_printed++; |
| 1784 | if (wrap_column) |
| 1785 | { |
| 1786 | save_style = wrap_style; |
| 1787 | if (stream->can_emit_style_escape ()) |
| 1788 | emit_style_escape (ui_file_style (), stream); |
| 1789 | /* If we aren't actually wrapping, don't output |
| 1790 | newline -- if chars_per_line is right, we |
| 1791 | probably just overflowed anyway; if it's wrong, |
| 1792 | let us keep going. */ |
| 1793 | fputc_unfiltered ('\n', stream); |
| 1794 | } |
| 1795 | else |
| 1796 | { |
| 1797 | save_style = applied_style; |
| 1798 | flush_wrap_buffer (stream); |
| 1799 | } |
| 1800 | |
| 1801 | /* Possible new page. Note that |
| 1802 | PAGINATION_DISABLED_FOR_COMMAND might be set during |
| 1803 | this loop, so we must continue to check it here. */ |
| 1804 | if (lines_printed >= lines_per_page - 1 |
| 1805 | && !pagination_disabled_for_command) |
| 1806 | { |
| 1807 | prompt_for_continue (); |
| 1808 | did_paginate = true; |
| 1809 | } |
| 1810 | |
| 1811 | /* Now output indentation and wrapped string. */ |
| 1812 | if (wrap_column) |
| 1813 | { |
| 1814 | fputs_unfiltered (wrap_indent, stream); |
| 1815 | if (stream->can_emit_style_escape ()) |
| 1816 | emit_style_escape (save_style, stream); |
| 1817 | /* FIXME, this strlen is what prevents wrap_indent from |
| 1818 | containing tabs. However, if we recurse to print it |
| 1819 | and count its chars, we risk trouble if wrap_indent is |
| 1820 | longer than (the user settable) chars_per_line. |
| 1821 | Note also that this can set chars_printed > chars_per_line |
| 1822 | if we are printing a long string. */ |
| 1823 | chars_printed = strlen (wrap_indent) |
| 1824 | + (save_chars - wrap_column); |
| 1825 | wrap_column = 0; /* And disable fancy wrap */ |
| 1826 | } |
| 1827 | else if (did_paginate && stream->can_emit_style_escape ()) |
| 1828 | emit_style_escape (save_style, stream); |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | if (*lineptr == '\n') |
| 1833 | { |
| 1834 | chars_printed = 0; |
| 1835 | wrap_here ((char *) 0); /* Spit out chars, cancel |
| 1836 | further wraps. */ |
| 1837 | lines_printed++; |
| 1838 | fputc_unfiltered ('\n', stream); |
| 1839 | lineptr++; |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | buffer_clearer.release (); |
| 1844 | } |
| 1845 | |
| 1846 | void |
| 1847 | fputs_filtered (const char *linebuffer, struct ui_file *stream) |
| 1848 | { |
| 1849 | fputs_maybe_filtered (linebuffer, stream, 1); |
| 1850 | } |
| 1851 | |
| 1852 | /* See utils.h. */ |
| 1853 | |
| 1854 | void |
| 1855 | fputs_styled (const char *linebuffer, const ui_file_style &style, |
| 1856 | struct ui_file *stream) |
| 1857 | { |
| 1858 | /* This just makes it so we emit somewhat fewer escape |
| 1859 | sequences. */ |
| 1860 | if (style.is_default ()) |
| 1861 | fputs_maybe_filtered (linebuffer, stream, 1); |
| 1862 | else |
| 1863 | { |
| 1864 | set_output_style (stream, style); |
| 1865 | fputs_maybe_filtered (linebuffer, stream, 1); |
| 1866 | set_output_style (stream, ui_file_style ()); |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | /* See utils.h. */ |
| 1871 | |
| 1872 | void |
| 1873 | fputs_highlighted (const char *str, const compiled_regex &highlight, |
| 1874 | struct ui_file *stream) |
| 1875 | { |
| 1876 | regmatch_t pmatch; |
| 1877 | |
| 1878 | while (*str && highlight.exec (str, 1, &pmatch, 0) == 0) |
| 1879 | { |
| 1880 | size_t n_highlight = pmatch.rm_eo - pmatch.rm_so; |
| 1881 | |
| 1882 | /* Output the part before pmatch with current style. */ |
| 1883 | while (pmatch.rm_so > 0) |
| 1884 | { |
| 1885 | fputc_filtered (*str, stream); |
| 1886 | pmatch.rm_so--; |
| 1887 | str++; |
| 1888 | } |
| 1889 | |
| 1890 | /* Output pmatch with the highlight style. */ |
| 1891 | set_output_style (stream, highlight_style.style ()); |
| 1892 | while (n_highlight > 0) |
| 1893 | { |
| 1894 | fputc_filtered (*str, stream); |
| 1895 | n_highlight--; |
| 1896 | str++; |
| 1897 | } |
| 1898 | set_output_style (stream, ui_file_style ()); |
| 1899 | } |
| 1900 | |
| 1901 | /* Output the trailing part of STR not matching HIGHLIGHT. */ |
| 1902 | if (*str) |
| 1903 | fputs_filtered (str, stream); |
| 1904 | } |
| 1905 | |
| 1906 | int |
| 1907 | putchar_unfiltered (int c) |
| 1908 | { |
| 1909 | char buf = c; |
| 1910 | |
| 1911 | ui_file_write (gdb_stdout, &buf, 1); |
| 1912 | return c; |
| 1913 | } |
| 1914 | |
| 1915 | /* Write character C to gdb_stdout using GDB's paging mechanism and return C. |
| 1916 | May return nonlocally. */ |
| 1917 | |
| 1918 | int |
| 1919 | putchar_filtered (int c) |
| 1920 | { |
| 1921 | return fputc_filtered (c, gdb_stdout); |
| 1922 | } |
| 1923 | |
| 1924 | int |
| 1925 | fputc_unfiltered (int c, struct ui_file *stream) |
| 1926 | { |
| 1927 | char buf = c; |
| 1928 | |
| 1929 | ui_file_write (stream, &buf, 1); |
| 1930 | return c; |
| 1931 | } |
| 1932 | |
| 1933 | int |
| 1934 | fputc_filtered (int c, struct ui_file *stream) |
| 1935 | { |
| 1936 | char buf[2]; |
| 1937 | |
| 1938 | buf[0] = c; |
| 1939 | buf[1] = 0; |
| 1940 | fputs_filtered (buf, stream); |
| 1941 | return c; |
| 1942 | } |
| 1943 | |
| 1944 | /* puts_debug is like fputs_unfiltered, except it prints special |
| 1945 | characters in printable fashion. */ |
| 1946 | |
| 1947 | void |
| 1948 | puts_debug (char *prefix, char *string, char *suffix) |
| 1949 | { |
| 1950 | int ch; |
| 1951 | |
| 1952 | /* Print prefix and suffix after each line. */ |
| 1953 | static int new_line = 1; |
| 1954 | static int return_p = 0; |
| 1955 | static const char *prev_prefix = ""; |
| 1956 | static const char *prev_suffix = ""; |
| 1957 | |
| 1958 | if (*string == '\n') |
| 1959 | return_p = 0; |
| 1960 | |
| 1961 | /* If the prefix is changing, print the previous suffix, a new line, |
| 1962 | and the new prefix. */ |
| 1963 | if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line) |
| 1964 | { |
| 1965 | fputs_unfiltered (prev_suffix, gdb_stdlog); |
| 1966 | fputs_unfiltered ("\n", gdb_stdlog); |
| 1967 | fputs_unfiltered (prefix, gdb_stdlog); |
| 1968 | } |
| 1969 | |
| 1970 | /* Print prefix if we printed a newline during the previous call. */ |
| 1971 | if (new_line) |
| 1972 | { |
| 1973 | new_line = 0; |
| 1974 | fputs_unfiltered (prefix, gdb_stdlog); |
| 1975 | } |
| 1976 | |
| 1977 | prev_prefix = prefix; |
| 1978 | prev_suffix = suffix; |
| 1979 | |
| 1980 | /* Output characters in a printable format. */ |
| 1981 | while ((ch = *string++) != '\0') |
| 1982 | { |
| 1983 | switch (ch) |
| 1984 | { |
| 1985 | default: |
| 1986 | if (isprint (ch)) |
| 1987 | fputc_unfiltered (ch, gdb_stdlog); |
| 1988 | |
| 1989 | else |
| 1990 | fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff); |
| 1991 | break; |
| 1992 | |
| 1993 | case '\\': |
| 1994 | fputs_unfiltered ("\\\\", gdb_stdlog); |
| 1995 | break; |
| 1996 | case '\b': |
| 1997 | fputs_unfiltered ("\\b", gdb_stdlog); |
| 1998 | break; |
| 1999 | case '\f': |
| 2000 | fputs_unfiltered ("\\f", gdb_stdlog); |
| 2001 | break; |
| 2002 | case '\n': |
| 2003 | new_line = 1; |
| 2004 | fputs_unfiltered ("\\n", gdb_stdlog); |
| 2005 | break; |
| 2006 | case '\r': |
| 2007 | fputs_unfiltered ("\\r", gdb_stdlog); |
| 2008 | break; |
| 2009 | case '\t': |
| 2010 | fputs_unfiltered ("\\t", gdb_stdlog); |
| 2011 | break; |
| 2012 | case '\v': |
| 2013 | fputs_unfiltered ("\\v", gdb_stdlog); |
| 2014 | break; |
| 2015 | } |
| 2016 | |
| 2017 | return_p = ch == '\r'; |
| 2018 | } |
| 2019 | |
| 2020 | /* Print suffix if we printed a newline. */ |
| 2021 | if (new_line) |
| 2022 | { |
| 2023 | fputs_unfiltered (suffix, gdb_stdlog); |
| 2024 | fputs_unfiltered ("\n", gdb_stdlog); |
| 2025 | } |
| 2026 | } |
| 2027 | |
| 2028 | |
| 2029 | /* Print a variable number of ARGS using format FORMAT. If this |
| 2030 | information is going to put the amount written (since the last call |
| 2031 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, |
| 2032 | call prompt_for_continue to get the users permision to continue. |
| 2033 | |
| 2034 | Unlike fprintf, this function does not return a value. |
| 2035 | |
| 2036 | We implement three variants, vfprintf (takes a vararg list and stream), |
| 2037 | fprintf (takes a stream to write on), and printf (the usual). |
| 2038 | |
| 2039 | Note also that a longjmp to top level may occur in this routine |
| 2040 | (since prompt_for_continue may do so) so this routine should not be |
| 2041 | called when cleanups are not in place. */ |
| 2042 | |
| 2043 | static void |
| 2044 | vfprintf_maybe_filtered (struct ui_file *stream, const char *format, |
| 2045 | va_list args, int filter) |
| 2046 | { |
| 2047 | std::string linebuffer = string_vprintf (format, args); |
| 2048 | fputs_maybe_filtered (linebuffer.c_str (), stream, filter); |
| 2049 | } |
| 2050 | |
| 2051 | |
| 2052 | void |
| 2053 | vfprintf_filtered (struct ui_file *stream, const char *format, va_list args) |
| 2054 | { |
| 2055 | vfprintf_maybe_filtered (stream, format, args, 1); |
| 2056 | } |
| 2057 | |
| 2058 | void |
| 2059 | vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args) |
| 2060 | { |
| 2061 | std::string linebuffer = string_vprintf (format, args); |
| 2062 | if (debug_timestamp && stream == gdb_stdlog) |
| 2063 | { |
| 2064 | using namespace std::chrono; |
| 2065 | int len, need_nl; |
| 2066 | |
| 2067 | steady_clock::time_point now = steady_clock::now (); |
| 2068 | seconds s = duration_cast<seconds> (now.time_since_epoch ()); |
| 2069 | microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s); |
| 2070 | |
| 2071 | len = linebuffer.size (); |
| 2072 | need_nl = (len > 0 && linebuffer[len - 1] != '\n'); |
| 2073 | |
| 2074 | std::string timestamp = string_printf ("%ld.%06ld %s%s", |
| 2075 | (long) s.count (), |
| 2076 | (long) us.count (), |
| 2077 | linebuffer.c_str (), |
| 2078 | need_nl ? "\n": ""); |
| 2079 | fputs_unfiltered (timestamp.c_str (), stream); |
| 2080 | } |
| 2081 | else |
| 2082 | fputs_unfiltered (linebuffer.c_str (), stream); |
| 2083 | } |
| 2084 | |
| 2085 | void |
| 2086 | vprintf_filtered (const char *format, va_list args) |
| 2087 | { |
| 2088 | vfprintf_maybe_filtered (gdb_stdout, format, args, 1); |
| 2089 | } |
| 2090 | |
| 2091 | void |
| 2092 | vprintf_unfiltered (const char *format, va_list args) |
| 2093 | { |
| 2094 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 2095 | } |
| 2096 | |
| 2097 | void |
| 2098 | fprintf_filtered (struct ui_file *stream, const char *format, ...) |
| 2099 | { |
| 2100 | va_list args; |
| 2101 | |
| 2102 | va_start (args, format); |
| 2103 | vfprintf_filtered (stream, format, args); |
| 2104 | va_end (args); |
| 2105 | } |
| 2106 | |
| 2107 | void |
| 2108 | fprintf_unfiltered (struct ui_file *stream, const char *format, ...) |
| 2109 | { |
| 2110 | va_list args; |
| 2111 | |
| 2112 | va_start (args, format); |
| 2113 | vfprintf_unfiltered (stream, format, args); |
| 2114 | va_end (args); |
| 2115 | } |
| 2116 | |
| 2117 | /* Like fprintf_filtered, but prints its result indented. |
| 2118 | Called as fprintfi_filtered (spaces, stream, format, ...); */ |
| 2119 | |
| 2120 | void |
| 2121 | fprintfi_filtered (int spaces, struct ui_file *stream, const char *format, |
| 2122 | ...) |
| 2123 | { |
| 2124 | va_list args; |
| 2125 | |
| 2126 | va_start (args, format); |
| 2127 | print_spaces_filtered (spaces, stream); |
| 2128 | |
| 2129 | vfprintf_filtered (stream, format, args); |
| 2130 | va_end (args); |
| 2131 | } |
| 2132 | |
| 2133 | /* See utils.h. */ |
| 2134 | |
| 2135 | void |
| 2136 | fprintf_styled (struct ui_file *stream, const ui_file_style &style, |
| 2137 | const char *format, ...) |
| 2138 | { |
| 2139 | va_list args; |
| 2140 | |
| 2141 | set_output_style (stream, style); |
| 2142 | va_start (args, format); |
| 2143 | vfprintf_filtered (stream, format, args); |
| 2144 | va_end (args); |
| 2145 | set_output_style (stream, ui_file_style ()); |
| 2146 | } |
| 2147 | |
| 2148 | |
| 2149 | void |
| 2150 | printf_filtered (const char *format, ...) |
| 2151 | { |
| 2152 | va_list args; |
| 2153 | |
| 2154 | va_start (args, format); |
| 2155 | vfprintf_filtered (gdb_stdout, format, args); |
| 2156 | va_end (args); |
| 2157 | } |
| 2158 | |
| 2159 | |
| 2160 | void |
| 2161 | printf_unfiltered (const char *format, ...) |
| 2162 | { |
| 2163 | va_list args; |
| 2164 | |
| 2165 | va_start (args, format); |
| 2166 | vfprintf_unfiltered (gdb_stdout, format, args); |
| 2167 | va_end (args); |
| 2168 | } |
| 2169 | |
| 2170 | /* Like printf_filtered, but prints it's result indented. |
| 2171 | Called as printfi_filtered (spaces, format, ...); */ |
| 2172 | |
| 2173 | void |
| 2174 | printfi_filtered (int spaces, const char *format, ...) |
| 2175 | { |
| 2176 | va_list args; |
| 2177 | |
| 2178 | va_start (args, format); |
| 2179 | print_spaces_filtered (spaces, gdb_stdout); |
| 2180 | vfprintf_filtered (gdb_stdout, format, args); |
| 2181 | va_end (args); |
| 2182 | } |
| 2183 | |
| 2184 | /* Easy -- but watch out! |
| 2185 | |
| 2186 | This routine is *not* a replacement for puts()! puts() appends a newline. |
| 2187 | This one doesn't, and had better not! */ |
| 2188 | |
| 2189 | void |
| 2190 | puts_filtered (const char *string) |
| 2191 | { |
| 2192 | fputs_filtered (string, gdb_stdout); |
| 2193 | } |
| 2194 | |
| 2195 | void |
| 2196 | puts_unfiltered (const char *string) |
| 2197 | { |
| 2198 | fputs_unfiltered (string, gdb_stdout); |
| 2199 | } |
| 2200 | |
| 2201 | /* Return a pointer to N spaces and a null. The pointer is good |
| 2202 | until the next call to here. */ |
| 2203 | char * |
| 2204 | n_spaces (int n) |
| 2205 | { |
| 2206 | char *t; |
| 2207 | static char *spaces = 0; |
| 2208 | static int max_spaces = -1; |
| 2209 | |
| 2210 | if (n > max_spaces) |
| 2211 | { |
| 2212 | if (spaces) |
| 2213 | xfree (spaces); |
| 2214 | spaces = (char *) xmalloc (n + 1); |
| 2215 | for (t = spaces + n; t != spaces;) |
| 2216 | *--t = ' '; |
| 2217 | spaces[n] = '\0'; |
| 2218 | max_spaces = n; |
| 2219 | } |
| 2220 | |
| 2221 | return spaces + max_spaces - n; |
| 2222 | } |
| 2223 | |
| 2224 | /* Print N spaces. */ |
| 2225 | void |
| 2226 | print_spaces_filtered (int n, struct ui_file *stream) |
| 2227 | { |
| 2228 | fputs_filtered (n_spaces (n), stream); |
| 2229 | } |
| 2230 | \f |
| 2231 | /* C++/ObjC demangler stuff. */ |
| 2232 | |
| 2233 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language |
| 2234 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. |
| 2235 | If the name is not mangled, or the language for the name is unknown, or |
| 2236 | demangling is off, the name is printed in its "raw" form. */ |
| 2237 | |
| 2238 | void |
| 2239 | fprintf_symbol_filtered (struct ui_file *stream, const char *name, |
| 2240 | enum language lang, int arg_mode) |
| 2241 | { |
| 2242 | char *demangled; |
| 2243 | |
| 2244 | if (name != NULL) |
| 2245 | { |
| 2246 | /* If user wants to see raw output, no problem. */ |
| 2247 | if (!demangle) |
| 2248 | { |
| 2249 | fputs_filtered (name, stream); |
| 2250 | } |
| 2251 | else |
| 2252 | { |
| 2253 | demangled = language_demangle (language_def (lang), name, arg_mode); |
| 2254 | fputs_filtered (demangled ? demangled : name, stream); |
| 2255 | if (demangled != NULL) |
| 2256 | { |
| 2257 | xfree (demangled); |
| 2258 | } |
| 2259 | } |
| 2260 | } |
| 2261 | } |
| 2262 | |
| 2263 | /* True if CH is a character that can be part of a symbol name. I.e., |
| 2264 | either a number, a letter, or a '_'. */ |
| 2265 | |
| 2266 | static bool |
| 2267 | valid_identifier_name_char (int ch) |
| 2268 | { |
| 2269 | return (isalnum (ch) || ch == '_'); |
| 2270 | } |
| 2271 | |
| 2272 | /* Skip to end of token, or to END, whatever comes first. Input is |
| 2273 | assumed to be a C++ operator name. */ |
| 2274 | |
| 2275 | static const char * |
| 2276 | cp_skip_operator_token (const char *token, const char *end) |
| 2277 | { |
| 2278 | const char *p = token; |
| 2279 | while (p != end && !isspace (*p) && *p != '(') |
| 2280 | { |
| 2281 | if (valid_identifier_name_char (*p)) |
| 2282 | { |
| 2283 | while (p != end && valid_identifier_name_char (*p)) |
| 2284 | p++; |
| 2285 | return p; |
| 2286 | } |
| 2287 | else |
| 2288 | { |
| 2289 | /* Note, ordered such that among ops that share a prefix, |
| 2290 | longer comes first. This is so that the loop below can |
| 2291 | bail on first match. */ |
| 2292 | static const char *ops[] = |
| 2293 | { |
| 2294 | "[", |
| 2295 | "]", |
| 2296 | "~", |
| 2297 | ",", |
| 2298 | "-=", "--", "->", "-", |
| 2299 | "+=", "++", "+", |
| 2300 | "*=", "*", |
| 2301 | "/=", "/", |
| 2302 | "%=", "%", |
| 2303 | "|=", "||", "|", |
| 2304 | "&=", "&&", "&", |
| 2305 | "^=", "^", |
| 2306 | "!=", "!", |
| 2307 | "<<=", "<=", "<<", "<", |
| 2308 | ">>=", ">=", ">>", ">", |
| 2309 | "==", "=", |
| 2310 | }; |
| 2311 | |
| 2312 | for (const char *op : ops) |
| 2313 | { |
| 2314 | size_t oplen = strlen (op); |
| 2315 | size_t lencmp = std::min<size_t> (oplen, end - p); |
| 2316 | |
| 2317 | if (strncmp (p, op, lencmp) == 0) |
| 2318 | return p + lencmp; |
| 2319 | } |
| 2320 | /* Some unidentified character. Return it. */ |
| 2321 | return p + 1; |
| 2322 | } |
| 2323 | } |
| 2324 | |
| 2325 | return p; |
| 2326 | } |
| 2327 | |
| 2328 | /* Advance STRING1/STRING2 past whitespace. */ |
| 2329 | |
| 2330 | static void |
| 2331 | skip_ws (const char *&string1, const char *&string2, const char *end_str2) |
| 2332 | { |
| 2333 | while (isspace (*string1)) |
| 2334 | string1++; |
| 2335 | while (string2 < end_str2 && isspace (*string2)) |
| 2336 | string2++; |
| 2337 | } |
| 2338 | |
| 2339 | /* True if STRING points at the start of a C++ operator name. START |
| 2340 | is the start of the string that STRING points to, hence when |
| 2341 | reading backwards, we must not read any character before START. */ |
| 2342 | |
| 2343 | static bool |
| 2344 | cp_is_operator (const char *string, const char *start) |
| 2345 | { |
| 2346 | return ((string == start |
| 2347 | || !valid_identifier_name_char (string[-1])) |
| 2348 | && strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0 |
| 2349 | && !valid_identifier_name_char (string[CP_OPERATOR_LEN])); |
| 2350 | } |
| 2351 | |
| 2352 | /* If *NAME points at an ABI tag, skip it and return true. Otherwise |
| 2353 | leave *NAME unmodified and return false. (see GCC's abi_tag |
| 2354 | attribute), such names are demangled as e.g., |
| 2355 | "function[abi:cxx11]()". */ |
| 2356 | |
| 2357 | static bool |
| 2358 | skip_abi_tag (const char **name) |
| 2359 | { |
| 2360 | const char *p = *name; |
| 2361 | |
| 2362 | if (startswith (p, "[abi:")) |
| 2363 | { |
| 2364 | p += 5; |
| 2365 | |
| 2366 | while (valid_identifier_name_char (*p)) |
| 2367 | p++; |
| 2368 | |
| 2369 | if (*p == ']') |
| 2370 | { |
| 2371 | p++; |
| 2372 | *name = p; |
| 2373 | return true; |
| 2374 | } |
| 2375 | } |
| 2376 | return false; |
| 2377 | } |
| 2378 | |
| 2379 | /* See utils.h. */ |
| 2380 | |
| 2381 | int |
| 2382 | strncmp_iw_with_mode (const char *string1, const char *string2, |
| 2383 | size_t string2_len, strncmp_iw_mode mode, |
| 2384 | enum language language, |
| 2385 | completion_match_for_lcd *match_for_lcd) |
| 2386 | { |
| 2387 | const char *string1_start = string1; |
| 2388 | const char *end_str2 = string2 + string2_len; |
| 2389 | bool skip_spaces = true; |
| 2390 | bool have_colon_op = (language == language_cplus |
| 2391 | || language == language_rust |
| 2392 | || language == language_fortran); |
| 2393 | |
| 2394 | while (1) |
| 2395 | { |
| 2396 | if (skip_spaces |
| 2397 | || ((isspace (*string1) && !valid_identifier_name_char (*string2)) |
| 2398 | || (isspace (*string2) && !valid_identifier_name_char (*string1)))) |
| 2399 | { |
| 2400 | skip_ws (string1, string2, end_str2); |
| 2401 | skip_spaces = false; |
| 2402 | } |
| 2403 | |
| 2404 | /* Skip [abi:cxx11] tags in the symbol name if the lookup name |
| 2405 | doesn't include them. E.g.: |
| 2406 | |
| 2407 | string1: function[abi:cxx1](int) |
| 2408 | string2: function |
| 2409 | |
| 2410 | string1: function[abi:cxx1](int) |
| 2411 | string2: function(int) |
| 2412 | |
| 2413 | string1: Struct[abi:cxx1]::function() |
| 2414 | string2: Struct::function() |
| 2415 | |
| 2416 | string1: function(Struct[abi:cxx1], int) |
| 2417 | string2: function(Struct, int) |
| 2418 | */ |
| 2419 | if (string2 == end_str2 |
| 2420 | || (*string2 != '[' && !valid_identifier_name_char (*string2))) |
| 2421 | { |
| 2422 | const char *abi_start = string1; |
| 2423 | |
| 2424 | /* There can be more than one tag. */ |
| 2425 | while (*string1 == '[' && skip_abi_tag (&string1)) |
| 2426 | ; |
| 2427 | |
| 2428 | if (match_for_lcd != NULL && abi_start != string1) |
| 2429 | match_for_lcd->mark_ignored_range (abi_start, string1); |
| 2430 | |
| 2431 | while (isspace (*string1)) |
| 2432 | string1++; |
| 2433 | } |
| 2434 | |
| 2435 | if (*string1 == '\0' || string2 == end_str2) |
| 2436 | break; |
| 2437 | |
| 2438 | /* Handle the :: operator. */ |
| 2439 | if (have_colon_op && string1[0] == ':' && string1[1] == ':') |
| 2440 | { |
| 2441 | if (*string2 != ':') |
| 2442 | return 1; |
| 2443 | |
| 2444 | string1++; |
| 2445 | string2++; |
| 2446 | |
| 2447 | if (string2 == end_str2) |
| 2448 | break; |
| 2449 | |
| 2450 | if (*string2 != ':') |
| 2451 | return 1; |
| 2452 | |
| 2453 | string1++; |
| 2454 | string2++; |
| 2455 | |
| 2456 | while (isspace (*string1)) |
| 2457 | string1++; |
| 2458 | while (string2 < end_str2 && isspace (*string2)) |
| 2459 | string2++; |
| 2460 | continue; |
| 2461 | } |
| 2462 | |
| 2463 | /* Handle C++ user-defined operators. */ |
| 2464 | else if (language == language_cplus |
| 2465 | && *string1 == 'o') |
| 2466 | { |
| 2467 | if (cp_is_operator (string1, string1_start)) |
| 2468 | { |
| 2469 | /* An operator name in STRING1. Check STRING2. */ |
| 2470 | size_t cmplen |
| 2471 | = std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2); |
| 2472 | if (strncmp (string1, string2, cmplen) != 0) |
| 2473 | return 1; |
| 2474 | |
| 2475 | string1 += cmplen; |
| 2476 | string2 += cmplen; |
| 2477 | |
| 2478 | if (string2 != end_str2) |
| 2479 | { |
| 2480 | /* Check for "operatorX" in STRING2. */ |
| 2481 | if (valid_identifier_name_char (*string2)) |
| 2482 | return 1; |
| 2483 | |
| 2484 | skip_ws (string1, string2, end_str2); |
| 2485 | } |
| 2486 | |
| 2487 | /* Handle operator(). */ |
| 2488 | if (*string1 == '(') |
| 2489 | { |
| 2490 | if (string2 == end_str2) |
| 2491 | { |
| 2492 | if (mode == strncmp_iw_mode::NORMAL) |
| 2493 | return 0; |
| 2494 | else |
| 2495 | { |
| 2496 | /* Don't break for the regular return at the |
| 2497 | bottom, because "operator" should not |
| 2498 | match "operator()", since this open |
| 2499 | parentheses is not the parameter list |
| 2500 | start. */ |
| 2501 | return *string1 != '\0'; |
| 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | if (*string1 != *string2) |
| 2506 | return 1; |
| 2507 | |
| 2508 | string1++; |
| 2509 | string2++; |
| 2510 | } |
| 2511 | |
| 2512 | while (1) |
| 2513 | { |
| 2514 | skip_ws (string1, string2, end_str2); |
| 2515 | |
| 2516 | /* Skip to end of token, or to END, whatever comes |
| 2517 | first. */ |
| 2518 | const char *end_str1 = string1 + strlen (string1); |
| 2519 | const char *p1 = cp_skip_operator_token (string1, end_str1); |
| 2520 | const char *p2 = cp_skip_operator_token (string2, end_str2); |
| 2521 | |
| 2522 | cmplen = std::min (p1 - string1, p2 - string2); |
| 2523 | if (p2 == end_str2) |
| 2524 | { |
| 2525 | if (strncmp (string1, string2, cmplen) != 0) |
| 2526 | return 1; |
| 2527 | } |
| 2528 | else |
| 2529 | { |
| 2530 | if (p1 - string1 != p2 - string2) |
| 2531 | return 1; |
| 2532 | if (strncmp (string1, string2, cmplen) != 0) |
| 2533 | return 1; |
| 2534 | } |
| 2535 | |
| 2536 | string1 += cmplen; |
| 2537 | string2 += cmplen; |
| 2538 | |
| 2539 | if (*string1 == '\0' || string2 == end_str2) |
| 2540 | break; |
| 2541 | if (*string1 == '(' || *string2 == '(') |
| 2542 | break; |
| 2543 | } |
| 2544 | |
| 2545 | continue; |
| 2546 | } |
| 2547 | } |
| 2548 | |
| 2549 | if (case_sensitivity == case_sensitive_on && *string1 != *string2) |
| 2550 | break; |
| 2551 | if (case_sensitivity == case_sensitive_off |
| 2552 | && (tolower ((unsigned char) *string1) |
| 2553 | != tolower ((unsigned char) *string2))) |
| 2554 | break; |
| 2555 | |
| 2556 | /* If we see any non-whitespace, non-identifier-name character |
| 2557 | (any of "()<>*&" etc.), then skip spaces the next time |
| 2558 | around. */ |
| 2559 | if (!isspace (*string1) && !valid_identifier_name_char (*string1)) |
| 2560 | skip_spaces = true; |
| 2561 | |
| 2562 | string1++; |
| 2563 | string2++; |
| 2564 | } |
| 2565 | |
| 2566 | if (string2 == end_str2) |
| 2567 | { |
| 2568 | if (mode == strncmp_iw_mode::NORMAL) |
| 2569 | { |
| 2570 | /* Strip abi tag markers from the matched symbol name. |
| 2571 | Usually the ABI marker will be found on function name |
| 2572 | (automatically added because the function returns an |
| 2573 | object marked with an ABI tag). However, it's also |
| 2574 | possible to see a marker in one of the function |
| 2575 | parameters, for example. |
| 2576 | |
| 2577 | string2 (lookup name): |
| 2578 | func |
| 2579 | symbol name: |
| 2580 | function(some_struct[abi:cxx11], int) |
| 2581 | |
| 2582 | and for completion LCD computation we want to say that |
| 2583 | the match was for: |
| 2584 | function(some_struct, int) |
| 2585 | */ |
| 2586 | if (match_for_lcd != NULL) |
| 2587 | { |
| 2588 | while ((string1 = strstr (string1, "[abi:")) != NULL) |
| 2589 | { |
| 2590 | const char *abi_start = string1; |
| 2591 | |
| 2592 | /* There can be more than one tag. */ |
| 2593 | while (skip_abi_tag (&string1) && *string1 == '[') |
| 2594 | ; |
| 2595 | |
| 2596 | if (abi_start != string1) |
| 2597 | match_for_lcd->mark_ignored_range (abi_start, string1); |
| 2598 | } |
| 2599 | } |
| 2600 | |
| 2601 | return 0; |
| 2602 | } |
| 2603 | else |
| 2604 | return (*string1 != '\0' && *string1 != '('); |
| 2605 | } |
| 2606 | else |
| 2607 | return 1; |
| 2608 | } |
| 2609 | |
| 2610 | /* See utils.h. */ |
| 2611 | |
| 2612 | int |
| 2613 | strncmp_iw (const char *string1, const char *string2, size_t string2_len) |
| 2614 | { |
| 2615 | return strncmp_iw_with_mode (string1, string2, string2_len, |
| 2616 | strncmp_iw_mode::NORMAL, language_minimal); |
| 2617 | } |
| 2618 | |
| 2619 | /* See utils.h. */ |
| 2620 | |
| 2621 | int |
| 2622 | strcmp_iw (const char *string1, const char *string2) |
| 2623 | { |
| 2624 | return strncmp_iw_with_mode (string1, string2, strlen (string2), |
| 2625 | strncmp_iw_mode::MATCH_PARAMS, language_minimal); |
| 2626 | } |
| 2627 | |
| 2628 | /* This is like strcmp except that it ignores whitespace and treats |
| 2629 | '(' as the first non-NULL character in terms of ordering. Like |
| 2630 | strcmp (and unlike strcmp_iw), it returns negative if STRING1 < |
| 2631 | STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2 |
| 2632 | according to that ordering. |
| 2633 | |
| 2634 | If a list is sorted according to this function and if you want to |
| 2635 | find names in the list that match some fixed NAME according to |
| 2636 | strcmp_iw(LIST_ELT, NAME), then the place to start looking is right |
| 2637 | where this function would put NAME. |
| 2638 | |
| 2639 | This function must be neutral to the CASE_SENSITIVITY setting as the user |
| 2640 | may choose it during later lookup. Therefore this function always sorts |
| 2641 | primarily case-insensitively and secondarily case-sensitively. |
| 2642 | |
| 2643 | Here are some examples of why using strcmp to sort is a bad idea: |
| 2644 | |
| 2645 | Whitespace example: |
| 2646 | |
| 2647 | Say your partial symtab contains: "foo<char *>", "goo". Then, if |
| 2648 | we try to do a search for "foo<char*>", strcmp will locate this |
| 2649 | after "foo<char *>" and before "goo". Then lookup_partial_symbol |
| 2650 | will start looking at strings beginning with "goo", and will never |
| 2651 | see the correct match of "foo<char *>". |
| 2652 | |
| 2653 | Parenthesis example: |
| 2654 | |
| 2655 | In practice, this is less like to be an issue, but I'll give it a |
| 2656 | shot. Let's assume that '$' is a legitimate character to occur in |
| 2657 | symbols. (Which may well even be the case on some systems.) Then |
| 2658 | say that the partial symbol table contains "foo$" and "foo(int)". |
| 2659 | strcmp will put them in this order, since '$' < '('. Now, if the |
| 2660 | user searches for "foo", then strcmp will sort "foo" before "foo$". |
| 2661 | Then lookup_partial_symbol will notice that strcmp_iw("foo$", |
| 2662 | "foo") is false, so it won't proceed to the actual match of |
| 2663 | "foo(int)" with "foo". */ |
| 2664 | |
| 2665 | int |
| 2666 | strcmp_iw_ordered (const char *string1, const char *string2) |
| 2667 | { |
| 2668 | const char *saved_string1 = string1, *saved_string2 = string2; |
| 2669 | enum case_sensitivity case_pass = case_sensitive_off; |
| 2670 | |
| 2671 | for (;;) |
| 2672 | { |
| 2673 | /* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'. |
| 2674 | Provide stub characters if we are already at the end of one of the |
| 2675 | strings. */ |
| 2676 | char c1 = 'X', c2 = 'X'; |
| 2677 | |
| 2678 | while (*string1 != '\0' && *string2 != '\0') |
| 2679 | { |
| 2680 | while (isspace (*string1)) |
| 2681 | string1++; |
| 2682 | while (isspace (*string2)) |
| 2683 | string2++; |
| 2684 | |
| 2685 | switch (case_pass) |
| 2686 | { |
| 2687 | case case_sensitive_off: |
| 2688 | c1 = tolower ((unsigned char) *string1); |
| 2689 | c2 = tolower ((unsigned char) *string2); |
| 2690 | break; |
| 2691 | case case_sensitive_on: |
| 2692 | c1 = *string1; |
| 2693 | c2 = *string2; |
| 2694 | break; |
| 2695 | } |
| 2696 | if (c1 != c2) |
| 2697 | break; |
| 2698 | |
| 2699 | if (*string1 != '\0') |
| 2700 | { |
| 2701 | string1++; |
| 2702 | string2++; |
| 2703 | } |
| 2704 | } |
| 2705 | |
| 2706 | switch (*string1) |
| 2707 | { |
| 2708 | /* Characters are non-equal unless they're both '\0'; we want to |
| 2709 | make sure we get the comparison right according to our |
| 2710 | comparison in the cases where one of them is '\0' or '('. */ |
| 2711 | case '\0': |
| 2712 | if (*string2 == '\0') |
| 2713 | break; |
| 2714 | else |
| 2715 | return -1; |
| 2716 | case '(': |
| 2717 | if (*string2 == '\0') |
| 2718 | return 1; |
| 2719 | else |
| 2720 | return -1; |
| 2721 | default: |
| 2722 | if (*string2 == '\0' || *string2 == '(') |
| 2723 | return 1; |
| 2724 | else if (c1 > c2) |
| 2725 | return 1; |
| 2726 | else if (c1 < c2) |
| 2727 | return -1; |
| 2728 | /* PASSTHRU */ |
| 2729 | } |
| 2730 | |
| 2731 | if (case_pass == case_sensitive_on) |
| 2732 | return 0; |
| 2733 | |
| 2734 | /* Otherwise the strings were equal in case insensitive way, make |
| 2735 | a more fine grained comparison in a case sensitive way. */ |
| 2736 | |
| 2737 | case_pass = case_sensitive_on; |
| 2738 | string1 = saved_string1; |
| 2739 | string2 = saved_string2; |
| 2740 | } |
| 2741 | } |
| 2742 | |
| 2743 | /* See utils.h. */ |
| 2744 | |
| 2745 | bool |
| 2746 | streq (const char *lhs, const char *rhs) |
| 2747 | { |
| 2748 | return !strcmp (lhs, rhs); |
| 2749 | } |
| 2750 | |
| 2751 | /* See utils.h. */ |
| 2752 | |
| 2753 | int |
| 2754 | streq_hash (const void *lhs, const void *rhs) |
| 2755 | { |
| 2756 | return streq ((const char *) lhs, (const char *) rhs); |
| 2757 | } |
| 2758 | |
| 2759 | \f |
| 2760 | |
| 2761 | /* |
| 2762 | ** subset_compare() |
| 2763 | ** Answer whether string_to_compare is a full or partial match to |
| 2764 | ** template_string. The partial match must be in sequence starting |
| 2765 | ** at index 0. |
| 2766 | */ |
| 2767 | int |
| 2768 | subset_compare (const char *string_to_compare, const char *template_string) |
| 2769 | { |
| 2770 | int match; |
| 2771 | |
| 2772 | if (template_string != NULL && string_to_compare != NULL |
| 2773 | && strlen (string_to_compare) <= strlen (template_string)) |
| 2774 | match = |
| 2775 | (startswith (template_string, string_to_compare)); |
| 2776 | else |
| 2777 | match = 0; |
| 2778 | return match; |
| 2779 | } |
| 2780 | |
| 2781 | static void |
| 2782 | show_debug_timestamp (struct ui_file *file, int from_tty, |
| 2783 | struct cmd_list_element *c, const char *value) |
| 2784 | { |
| 2785 | fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"), |
| 2786 | value); |
| 2787 | } |
| 2788 | \f |
| 2789 | |
| 2790 | void |
| 2791 | initialize_utils (void) |
| 2792 | { |
| 2793 | add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\ |
| 2794 | Set number of characters where GDB should wrap lines of its output."), _("\ |
| 2795 | Show number of characters where GDB should wrap lines of its output."), _("\ |
| 2796 | This affects where GDB wraps its output to fit the screen width.\n\ |
| 2797 | Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."), |
| 2798 | set_width_command, |
| 2799 | show_chars_per_line, |
| 2800 | &setlist, &showlist); |
| 2801 | |
| 2802 | add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\ |
| 2803 | Set number of lines in a page for GDB output pagination."), _("\ |
| 2804 | Show number of lines in a page for GDB output pagination."), _("\ |
| 2805 | This affects the number of lines after which GDB will pause\n\ |
| 2806 | its output and ask you whether to continue.\n\ |
| 2807 | Setting this to \"unlimited\" or zero causes GDB never pause during output."), |
| 2808 | set_height_command, |
| 2809 | show_lines_per_page, |
| 2810 | &setlist, &showlist); |
| 2811 | |
| 2812 | add_setshow_boolean_cmd ("pagination", class_support, |
| 2813 | &pagination_enabled, _("\ |
| 2814 | Set state of GDB output pagination."), _("\ |
| 2815 | Show state of GDB output pagination."), _("\ |
| 2816 | When pagination is ON, GDB pauses at end of each screenful of\n\ |
| 2817 | its output and asks you whether to continue.\n\ |
| 2818 | Turning pagination off is an alternative to \"set height unlimited\"."), |
| 2819 | NULL, |
| 2820 | show_pagination_enabled, |
| 2821 | &setlist, &showlist); |
| 2822 | |
| 2823 | add_setshow_boolean_cmd ("sevenbit-strings", class_support, |
| 2824 | &sevenbit_strings, _("\ |
| 2825 | Set printing of 8-bit characters in strings as \\nnn."), _("\ |
| 2826 | Show printing of 8-bit characters in strings as \\nnn."), NULL, |
| 2827 | NULL, |
| 2828 | show_sevenbit_strings, |
| 2829 | &setprintlist, &showprintlist); |
| 2830 | |
| 2831 | add_setshow_boolean_cmd ("timestamp", class_maintenance, |
| 2832 | &debug_timestamp, _("\ |
| 2833 | Set timestamping of debugging messages."), _("\ |
| 2834 | Show timestamping of debugging messages."), _("\ |
| 2835 | When set, debugging messages will be marked with seconds and microseconds."), |
| 2836 | NULL, |
| 2837 | show_debug_timestamp, |
| 2838 | &setdebuglist, &showdebuglist); |
| 2839 | } |
| 2840 | |
| 2841 | /* See utils.h. */ |
| 2842 | |
| 2843 | CORE_ADDR |
| 2844 | address_significant (gdbarch *gdbarch, CORE_ADDR addr) |
| 2845 | { |
| 2846 | /* Clear insignificant bits of a target address and sign extend resulting |
| 2847 | address, avoiding shifts larger or equal than the width of a CORE_ADDR. |
| 2848 | The local variable ADDR_BIT stops the compiler reporting a shift overflow |
| 2849 | when it won't occur. Skip updating of target address if current target |
| 2850 | has not set gdbarch significant_addr_bit. */ |
| 2851 | int addr_bit = gdbarch_significant_addr_bit (gdbarch); |
| 2852 | |
| 2853 | if (addr_bit && (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))) |
| 2854 | { |
| 2855 | CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1); |
| 2856 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 2857 | addr = (addr ^ sign) - sign; |
| 2858 | } |
| 2859 | |
| 2860 | return addr; |
| 2861 | } |
| 2862 | |
| 2863 | const char * |
| 2864 | paddress (struct gdbarch *gdbarch, CORE_ADDR addr) |
| 2865 | { |
| 2866 | /* Truncate address to the size of a target address, avoiding shifts |
| 2867 | larger or equal than the width of a CORE_ADDR. The local |
| 2868 | variable ADDR_BIT stops the compiler reporting a shift overflow |
| 2869 | when it won't occur. */ |
| 2870 | /* NOTE: This assumes that the significant address information is |
| 2871 | kept in the least significant bits of ADDR - the upper bits were |
| 2872 | either zero or sign extended. Should gdbarch_address_to_pointer or |
| 2873 | some ADDRESS_TO_PRINTABLE() be used to do the conversion? */ |
| 2874 | |
| 2875 | int addr_bit = gdbarch_addr_bit (gdbarch); |
| 2876 | |
| 2877 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 2878 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 2879 | return hex_string (addr); |
| 2880 | } |
| 2881 | |
| 2882 | /* This function is described in "defs.h". */ |
| 2883 | |
| 2884 | const char * |
| 2885 | print_core_address (struct gdbarch *gdbarch, CORE_ADDR address) |
| 2886 | { |
| 2887 | int addr_bit = gdbarch_addr_bit (gdbarch); |
| 2888 | |
| 2889 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 2890 | address &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 2891 | |
| 2892 | /* FIXME: cagney/2002-05-03: Need local_address_string() function |
| 2893 | that returns the language localized string formatted to a width |
| 2894 | based on gdbarch_addr_bit. */ |
| 2895 | if (addr_bit <= 32) |
| 2896 | return hex_string_custom (address, 8); |
| 2897 | else |
| 2898 | return hex_string_custom (address, 16); |
| 2899 | } |
| 2900 | |
| 2901 | /* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */ |
| 2902 | |
| 2903 | hashval_t |
| 2904 | core_addr_hash (const void *ap) |
| 2905 | { |
| 2906 | const CORE_ADDR *addrp = (const CORE_ADDR *) ap; |
| 2907 | |
| 2908 | return *addrp; |
| 2909 | } |
| 2910 | |
| 2911 | /* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */ |
| 2912 | |
| 2913 | int |
| 2914 | core_addr_eq (const void *ap, const void *bp) |
| 2915 | { |
| 2916 | const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap; |
| 2917 | const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp; |
| 2918 | |
| 2919 | return *addr_ap == *addr_bp; |
| 2920 | } |
| 2921 | |
| 2922 | /* Convert a string back into a CORE_ADDR. */ |
| 2923 | CORE_ADDR |
| 2924 | string_to_core_addr (const char *my_string) |
| 2925 | { |
| 2926 | CORE_ADDR addr = 0; |
| 2927 | |
| 2928 | if (my_string[0] == '0' && tolower (my_string[1]) == 'x') |
| 2929 | { |
| 2930 | /* Assume that it is in hex. */ |
| 2931 | int i; |
| 2932 | |
| 2933 | for (i = 2; my_string[i] != '\0'; i++) |
| 2934 | { |
| 2935 | if (isdigit (my_string[i])) |
| 2936 | addr = (my_string[i] - '0') + (addr * 16); |
| 2937 | else if (isxdigit (my_string[i])) |
| 2938 | addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16); |
| 2939 | else |
| 2940 | error (_("invalid hex \"%s\""), my_string); |
| 2941 | } |
| 2942 | } |
| 2943 | else |
| 2944 | { |
| 2945 | /* Assume that it is in decimal. */ |
| 2946 | int i; |
| 2947 | |
| 2948 | for (i = 0; my_string[i] != '\0'; i++) |
| 2949 | { |
| 2950 | if (isdigit (my_string[i])) |
| 2951 | addr = (my_string[i] - '0') + (addr * 10); |
| 2952 | else |
| 2953 | error (_("invalid decimal \"%s\""), my_string); |
| 2954 | } |
| 2955 | } |
| 2956 | |
| 2957 | return addr; |
| 2958 | } |
| 2959 | |
| 2960 | #if GDB_SELF_TEST |
| 2961 | |
| 2962 | static void |
| 2963 | gdb_realpath_check_trailer (const char *input, const char *trailer) |
| 2964 | { |
| 2965 | gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input); |
| 2966 | |
| 2967 | size_t len = strlen (result.get ()); |
| 2968 | size_t trail_len = strlen (trailer); |
| 2969 | |
| 2970 | SELF_CHECK (len >= trail_len |
| 2971 | && strcmp (result.get () + len - trail_len, trailer) == 0); |
| 2972 | } |
| 2973 | |
| 2974 | static void |
| 2975 | gdb_realpath_tests () |
| 2976 | { |
| 2977 | /* A file which contains a directory prefix. */ |
| 2978 | gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp"); |
| 2979 | /* A file which contains a directory prefix. */ |
| 2980 | gdb_realpath_check_trailer ("../../defs.h", "/defs.h"); |
| 2981 | /* A one-character filename. */ |
| 2982 | gdb_realpath_check_trailer ("./a", "/a"); |
| 2983 | /* A file in the root directory. */ |
| 2984 | gdb_realpath_check_trailer ("/root_file_which_should_exist", |
| 2985 | "/root_file_which_should_exist"); |
| 2986 | /* A file which does not have a directory prefix. */ |
| 2987 | gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp"); |
| 2988 | /* A one-char filename without any directory prefix. */ |
| 2989 | gdb_realpath_check_trailer ("a", "a"); |
| 2990 | /* An empty filename. */ |
| 2991 | gdb_realpath_check_trailer ("", ""); |
| 2992 | } |
| 2993 | |
| 2994 | #endif /* GDB_SELF_TEST */ |
| 2995 | |
| 2996 | /* Allocation function for the libiberty hash table which uses an |
| 2997 | obstack. The obstack is passed as DATA. */ |
| 2998 | |
| 2999 | void * |
| 3000 | hashtab_obstack_allocate (void *data, size_t size, size_t count) |
| 3001 | { |
| 3002 | size_t total = size * count; |
| 3003 | void *ptr = obstack_alloc ((struct obstack *) data, total); |
| 3004 | |
| 3005 | memset (ptr, 0, total); |
| 3006 | return ptr; |
| 3007 | } |
| 3008 | |
| 3009 | /* Trivial deallocation function for the libiberty splay tree and hash |
| 3010 | table - don't deallocate anything. Rely on later deletion of the |
| 3011 | obstack. DATA will be the obstack, although it is not needed |
| 3012 | here. */ |
| 3013 | |
| 3014 | void |
| 3015 | dummy_obstack_deallocate (void *object, void *data) |
| 3016 | { |
| 3017 | return; |
| 3018 | } |
| 3019 | |
| 3020 | /* Simple, portable version of dirname that does not modify its |
| 3021 | argument. */ |
| 3022 | |
| 3023 | std::string |
| 3024 | ldirname (const char *filename) |
| 3025 | { |
| 3026 | std::string dirname; |
| 3027 | const char *base = lbasename (filename); |
| 3028 | |
| 3029 | while (base > filename && IS_DIR_SEPARATOR (base[-1])) |
| 3030 | --base; |
| 3031 | |
| 3032 | if (base == filename) |
| 3033 | return dirname; |
| 3034 | |
| 3035 | dirname = std::string (filename, base - filename); |
| 3036 | |
| 3037 | /* On DOS based file systems, convert "d:foo" to "d:.", so that we |
| 3038 | create "d:./bar" later instead of the (different) "d:/bar". */ |
| 3039 | if (base - filename == 2 && IS_ABSOLUTE_PATH (base) |
| 3040 | && !IS_DIR_SEPARATOR (filename[0])) |
| 3041 | dirname[base++ - filename] = '.'; |
| 3042 | |
| 3043 | return dirname; |
| 3044 | } |
| 3045 | |
| 3046 | /* See utils.h. */ |
| 3047 | |
| 3048 | void |
| 3049 | gdb_argv::reset (const char *s) |
| 3050 | { |
| 3051 | char **argv = buildargv (s); |
| 3052 | |
| 3053 | if (s != NULL && argv == NULL) |
| 3054 | malloc_failure (0); |
| 3055 | |
| 3056 | freeargv (m_argv); |
| 3057 | m_argv = argv; |
| 3058 | } |
| 3059 | |
| 3060 | int |
| 3061 | compare_positive_ints (const void *ap, const void *bp) |
| 3062 | { |
| 3063 | /* Because we know we're comparing two ints which are positive, |
| 3064 | there's no danger of overflow here. */ |
| 3065 | return * (int *) ap - * (int *) bp; |
| 3066 | } |
| 3067 | |
| 3068 | #define AMBIGUOUS_MESS1 ".\nMatching formats:" |
| 3069 | #define AMBIGUOUS_MESS2 \ |
| 3070 | ".\nUse \"set gnutarget format-name\" to specify the format." |
| 3071 | |
| 3072 | std::string |
| 3073 | gdb_bfd_errmsg (bfd_error_type error_tag, char **matching) |
| 3074 | { |
| 3075 | char **p; |
| 3076 | |
| 3077 | /* Check if errmsg just need simple return. */ |
| 3078 | if (error_tag != bfd_error_file_ambiguously_recognized || matching == NULL) |
| 3079 | return bfd_errmsg (error_tag); |
| 3080 | |
| 3081 | std::string ret (bfd_errmsg (error_tag)); |
| 3082 | ret += AMBIGUOUS_MESS1; |
| 3083 | |
| 3084 | for (p = matching; *p; p++) |
| 3085 | { |
| 3086 | ret += " "; |
| 3087 | ret += *p; |
| 3088 | } |
| 3089 | ret += AMBIGUOUS_MESS2; |
| 3090 | |
| 3091 | xfree (matching); |
| 3092 | |
| 3093 | return ret; |
| 3094 | } |
| 3095 | |
| 3096 | /* Return ARGS parsed as a valid pid, or throw an error. */ |
| 3097 | |
| 3098 | int |
| 3099 | parse_pid_to_attach (const char *args) |
| 3100 | { |
| 3101 | unsigned long pid; |
| 3102 | char *dummy; |
| 3103 | |
| 3104 | if (!args) |
| 3105 | error_no_arg (_("process-id to attach")); |
| 3106 | |
| 3107 | dummy = (char *) args; |
| 3108 | pid = strtoul (args, &dummy, 0); |
| 3109 | /* Some targets don't set errno on errors, grrr! */ |
| 3110 | if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)]) |
| 3111 | error (_("Illegal process-id: %s."), args); |
| 3112 | |
| 3113 | return pid; |
| 3114 | } |
| 3115 | |
| 3116 | /* Substitute all occurences of string FROM by string TO in *STRINGP. *STRINGP |
| 3117 | must come from xrealloc-compatible allocator and it may be updated. FROM |
| 3118 | needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be |
| 3119 | located at the start or end of *STRINGP. */ |
| 3120 | |
| 3121 | void |
| 3122 | substitute_path_component (char **stringp, const char *from, const char *to) |
| 3123 | { |
| 3124 | char *string = *stringp, *s; |
| 3125 | const size_t from_len = strlen (from); |
| 3126 | const size_t to_len = strlen (to); |
| 3127 | |
| 3128 | for (s = string;;) |
| 3129 | { |
| 3130 | s = strstr (s, from); |
| 3131 | if (s == NULL) |
| 3132 | break; |
| 3133 | |
| 3134 | if ((s == string || IS_DIR_SEPARATOR (s[-1]) |
| 3135 | || s[-1] == DIRNAME_SEPARATOR) |
| 3136 | && (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len]) |
| 3137 | || s[from_len] == DIRNAME_SEPARATOR)) |
| 3138 | { |
| 3139 | char *string_new; |
| 3140 | |
| 3141 | string_new |
| 3142 | = (char *) xrealloc (string, (strlen (string) + to_len + 1)); |
| 3143 | |
| 3144 | /* Relocate the current S pointer. */ |
| 3145 | s = s - string + string_new; |
| 3146 | string = string_new; |
| 3147 | |
| 3148 | /* Replace from by to. */ |
| 3149 | memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1); |
| 3150 | memcpy (s, to, to_len); |
| 3151 | |
| 3152 | s += to_len; |
| 3153 | } |
| 3154 | else |
| 3155 | s++; |
| 3156 | } |
| 3157 | |
| 3158 | *stringp = string; |
| 3159 | } |
| 3160 | |
| 3161 | #ifdef HAVE_WAITPID |
| 3162 | |
| 3163 | #ifdef SIGALRM |
| 3164 | |
| 3165 | /* SIGALRM handler for waitpid_with_timeout. */ |
| 3166 | |
| 3167 | static void |
| 3168 | sigalrm_handler (int signo) |
| 3169 | { |
| 3170 | /* Nothing to do. */ |
| 3171 | } |
| 3172 | |
| 3173 | #endif |
| 3174 | |
| 3175 | /* Wrapper to wait for child PID to die with TIMEOUT. |
| 3176 | TIMEOUT is the time to stop waiting in seconds. |
| 3177 | If TIMEOUT is zero, pass WNOHANG to waitpid. |
| 3178 | Returns PID if it was successfully waited for, otherwise -1. |
| 3179 | |
| 3180 | Timeouts are currently implemented with alarm and SIGALRM. |
| 3181 | If the host does not support them, this waits "forever". |
| 3182 | It would be odd though for a host to have waitpid and not SIGALRM. */ |
| 3183 | |
| 3184 | pid_t |
| 3185 | wait_to_die_with_timeout (pid_t pid, int *status, int timeout) |
| 3186 | { |
| 3187 | pid_t waitpid_result; |
| 3188 | |
| 3189 | gdb_assert (pid > 0); |
| 3190 | gdb_assert (timeout >= 0); |
| 3191 | |
| 3192 | if (timeout > 0) |
| 3193 | { |
| 3194 | #ifdef SIGALRM |
| 3195 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 3196 | struct sigaction sa, old_sa; |
| 3197 | |
| 3198 | sa.sa_handler = sigalrm_handler; |
| 3199 | sigemptyset (&sa.sa_mask); |
| 3200 | sa.sa_flags = 0; |
| 3201 | sigaction (SIGALRM, &sa, &old_sa); |
| 3202 | #else |
| 3203 | sighandler_t ofunc; |
| 3204 | |
| 3205 | ofunc = signal (SIGALRM, sigalrm_handler); |
| 3206 | #endif |
| 3207 | |
| 3208 | alarm (timeout); |
| 3209 | #endif |
| 3210 | |
| 3211 | waitpid_result = waitpid (pid, status, 0); |
| 3212 | |
| 3213 | #ifdef SIGALRM |
| 3214 | alarm (0); |
| 3215 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) |
| 3216 | sigaction (SIGALRM, &old_sa, NULL); |
| 3217 | #else |
| 3218 | signal (SIGALRM, ofunc); |
| 3219 | #endif |
| 3220 | #endif |
| 3221 | } |
| 3222 | else |
| 3223 | waitpid_result = waitpid (pid, status, WNOHANG); |
| 3224 | |
| 3225 | if (waitpid_result == pid) |
| 3226 | return pid; |
| 3227 | else |
| 3228 | return -1; |
| 3229 | } |
| 3230 | |
| 3231 | #endif /* HAVE_WAITPID */ |
| 3232 | |
| 3233 | /* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files. |
| 3234 | Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS. |
| 3235 | |
| 3236 | It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and |
| 3237 | HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */ |
| 3238 | |
| 3239 | int |
| 3240 | gdb_filename_fnmatch (const char *pattern, const char *string, int flags) |
| 3241 | { |
| 3242 | gdb_assert ((flags & FNM_FILE_NAME) != 0); |
| 3243 | |
| 3244 | /* It is unclear how '\' escaping vs. directory separator should coexist. */ |
| 3245 | gdb_assert ((flags & FNM_NOESCAPE) != 0); |
| 3246 | |
| 3247 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 3248 | { |
| 3249 | char *pattern_slash, *string_slash; |
| 3250 | |
| 3251 | /* Replace '\' by '/' in both strings. */ |
| 3252 | |
| 3253 | pattern_slash = (char *) alloca (strlen (pattern) + 1); |
| 3254 | strcpy (pattern_slash, pattern); |
| 3255 | pattern = pattern_slash; |
| 3256 | for (; *pattern_slash != 0; pattern_slash++) |
| 3257 | if (IS_DIR_SEPARATOR (*pattern_slash)) |
| 3258 | *pattern_slash = '/'; |
| 3259 | |
| 3260 | string_slash = (char *) alloca (strlen (string) + 1); |
| 3261 | strcpy (string_slash, string); |
| 3262 | string = string_slash; |
| 3263 | for (; *string_slash != 0; string_slash++) |
| 3264 | if (IS_DIR_SEPARATOR (*string_slash)) |
| 3265 | *string_slash = '/'; |
| 3266 | } |
| 3267 | #endif /* HAVE_DOS_BASED_FILE_SYSTEM */ |
| 3268 | |
| 3269 | #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM |
| 3270 | flags |= FNM_CASEFOLD; |
| 3271 | #endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */ |
| 3272 | |
| 3273 | return fnmatch (pattern, string, flags); |
| 3274 | } |
| 3275 | |
| 3276 | /* Return the number of path elements in PATH. |
| 3277 | / = 1 |
| 3278 | /foo = 2 |
| 3279 | /foo/ = 2 |
| 3280 | foo/bar = 2 |
| 3281 | foo/ = 1 */ |
| 3282 | |
| 3283 | int |
| 3284 | count_path_elements (const char *path) |
| 3285 | { |
| 3286 | int count = 0; |
| 3287 | const char *p = path; |
| 3288 | |
| 3289 | if (HAS_DRIVE_SPEC (p)) |
| 3290 | { |
| 3291 | p = STRIP_DRIVE_SPEC (p); |
| 3292 | ++count; |
| 3293 | } |
| 3294 | |
| 3295 | while (*p != '\0') |
| 3296 | { |
| 3297 | if (IS_DIR_SEPARATOR (*p)) |
| 3298 | ++count; |
| 3299 | ++p; |
| 3300 | } |
| 3301 | |
| 3302 | /* Backup one if last character is /, unless it's the only one. */ |
| 3303 | if (p > path + 1 && IS_DIR_SEPARATOR (p[-1])) |
| 3304 | --count; |
| 3305 | |
| 3306 | /* Add one for the file name, if present. */ |
| 3307 | if (p > path && !IS_DIR_SEPARATOR (p[-1])) |
| 3308 | ++count; |
| 3309 | |
| 3310 | return count; |
| 3311 | } |
| 3312 | |
| 3313 | /* Remove N leading path elements from PATH. |
| 3314 | N must be non-negative. |
| 3315 | If PATH has more than N path elements then return NULL. |
| 3316 | If PATH has exactly N path elements then return "". |
| 3317 | See count_path_elements for a description of how we do the counting. */ |
| 3318 | |
| 3319 | const char * |
| 3320 | strip_leading_path_elements (const char *path, int n) |
| 3321 | { |
| 3322 | int i = 0; |
| 3323 | const char *p = path; |
| 3324 | |
| 3325 | gdb_assert (n >= 0); |
| 3326 | |
| 3327 | if (n == 0) |
| 3328 | return p; |
| 3329 | |
| 3330 | if (HAS_DRIVE_SPEC (p)) |
| 3331 | { |
| 3332 | p = STRIP_DRIVE_SPEC (p); |
| 3333 | ++i; |
| 3334 | } |
| 3335 | |
| 3336 | while (i < n) |
| 3337 | { |
| 3338 | while (*p != '\0' && !IS_DIR_SEPARATOR (*p)) |
| 3339 | ++p; |
| 3340 | if (*p == '\0') |
| 3341 | { |
| 3342 | if (i + 1 == n) |
| 3343 | return ""; |
| 3344 | return NULL; |
| 3345 | } |
| 3346 | ++p; |
| 3347 | ++i; |
| 3348 | } |
| 3349 | |
| 3350 | return p; |
| 3351 | } |
| 3352 | |
| 3353 | /* See utils.h. */ |
| 3354 | |
| 3355 | void |
| 3356 | copy_bitwise (gdb_byte *dest, ULONGEST dest_offset, |
| 3357 | const gdb_byte *source, ULONGEST source_offset, |
| 3358 | ULONGEST nbits, int bits_big_endian) |
| 3359 | { |
| 3360 | unsigned int buf, avail; |
| 3361 | |
| 3362 | if (nbits == 0) |
| 3363 | return; |
| 3364 | |
| 3365 | if (bits_big_endian) |
| 3366 | { |
| 3367 | /* Start from the end, then work backwards. */ |
| 3368 | dest_offset += nbits - 1; |
| 3369 | dest += dest_offset / 8; |
| 3370 | dest_offset = 7 - dest_offset % 8; |
| 3371 | source_offset += nbits - 1; |
| 3372 | source += source_offset / 8; |
| 3373 | source_offset = 7 - source_offset % 8; |
| 3374 | } |
| 3375 | else |
| 3376 | { |
| 3377 | dest += dest_offset / 8; |
| 3378 | dest_offset %= 8; |
| 3379 | source += source_offset / 8; |
| 3380 | source_offset %= 8; |
| 3381 | } |
| 3382 | |
| 3383 | /* Fill BUF with DEST_OFFSET bits from the destination and 8 - |
| 3384 | SOURCE_OFFSET bits from the source. */ |
| 3385 | buf = *(bits_big_endian ? source-- : source++) >> source_offset; |
| 3386 | buf <<= dest_offset; |
| 3387 | buf |= *dest & ((1 << dest_offset) - 1); |
| 3388 | |
| 3389 | /* NBITS: bits yet to be written; AVAIL: BUF's fill level. */ |
| 3390 | nbits += dest_offset; |
| 3391 | avail = dest_offset + 8 - source_offset; |
| 3392 | |
| 3393 | /* Flush 8 bits from BUF, if appropriate. */ |
| 3394 | if (nbits >= 8 && avail >= 8) |
| 3395 | { |
| 3396 | *(bits_big_endian ? dest-- : dest++) = buf; |
| 3397 | buf >>= 8; |
| 3398 | avail -= 8; |
| 3399 | nbits -= 8; |
| 3400 | } |
| 3401 | |
| 3402 | /* Copy the middle part. */ |
| 3403 | if (nbits >= 8) |
| 3404 | { |
| 3405 | size_t len = nbits / 8; |
| 3406 | |
| 3407 | /* Use a faster method for byte-aligned copies. */ |
| 3408 | if (avail == 0) |
| 3409 | { |
| 3410 | if (bits_big_endian) |
| 3411 | { |
| 3412 | dest -= len; |
| 3413 | source -= len; |
| 3414 | memcpy (dest + 1, source + 1, len); |
| 3415 | } |
| 3416 | else |
| 3417 | { |
| 3418 | memcpy (dest, source, len); |
| 3419 | dest += len; |
| 3420 | source += len; |
| 3421 | } |
| 3422 | } |
| 3423 | else |
| 3424 | { |
| 3425 | while (len--) |
| 3426 | { |
| 3427 | buf |= *(bits_big_endian ? source-- : source++) << avail; |
| 3428 | *(bits_big_endian ? dest-- : dest++) = buf; |
| 3429 | buf >>= 8; |
| 3430 | } |
| 3431 | } |
| 3432 | nbits %= 8; |
| 3433 | } |
| 3434 | |
| 3435 | /* Write the last byte. */ |
| 3436 | if (nbits) |
| 3437 | { |
| 3438 | if (avail < nbits) |
| 3439 | buf |= *source << avail; |
| 3440 | |
| 3441 | buf &= (1 << nbits) - 1; |
| 3442 | *dest = (*dest & (~0 << nbits)) | buf; |
| 3443 | } |
| 3444 | } |
| 3445 | |
| 3446 | void |
| 3447 | _initialize_utils (void) |
| 3448 | { |
| 3449 | add_internal_problem_command (&internal_error_problem); |
| 3450 | add_internal_problem_command (&internal_warning_problem); |
| 3451 | add_internal_problem_command (&demangler_warning_problem); |
| 3452 | |
| 3453 | #if GDB_SELF_TEST |
| 3454 | selftests::register_test ("gdb_realpath", gdb_realpath_tests); |
| 3455 | #endif |
| 3456 | } |