| 1 | /* Top level stuff for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcmd.h" |
| 22 | #include "cli/cli-cmds.h" |
| 23 | #include "cli/cli-script.h" |
| 24 | #include "cli/cli-setshow.h" |
| 25 | #include "cli/cli-decode.h" |
| 26 | #include "symtab.h" |
| 27 | #include "inferior.h" |
| 28 | #include "infrun.h" |
| 29 | #include <signal.h> |
| 30 | #include "target.h" |
| 31 | #include "target-dcache.h" |
| 32 | #include "breakpoint.h" |
| 33 | #include "gdbtypes.h" |
| 34 | #include "expression.h" |
| 35 | #include "value.h" |
| 36 | #include "language.h" |
| 37 | #include "terminal.h" /* For job_control. */ |
| 38 | #include "annotate.h" |
| 39 | #include "completer.h" |
| 40 | #include "top.h" |
| 41 | #include "version.h" |
| 42 | #include "serial.h" |
| 43 | #include "doublest.h" |
| 44 | #include "main.h" |
| 45 | #include "event-loop.h" |
| 46 | #include "gdbthread.h" |
| 47 | #include "extension.h" |
| 48 | #include "interps.h" |
| 49 | #include "observer.h" |
| 50 | #include "maint.h" |
| 51 | #include "filenames.h" |
| 52 | #include "frame.h" |
| 53 | #include "buffer.h" |
| 54 | #include "gdb_select.h" |
| 55 | |
| 56 | /* readline include files. */ |
| 57 | #include "readline/readline.h" |
| 58 | #include "readline/history.h" |
| 59 | |
| 60 | /* readline defines this. */ |
| 61 | #undef savestring |
| 62 | |
| 63 | #include <sys/types.h> |
| 64 | |
| 65 | #include "event-top.h" |
| 66 | #include <sys/stat.h> |
| 67 | #include <ctype.h> |
| 68 | #include "ui-out.h" |
| 69 | #include "cli-out.h" |
| 70 | #include "tracepoint.h" |
| 71 | #include "inf-loop.h" |
| 72 | |
| 73 | #if defined(TUI) |
| 74 | # include "tui/tui.h" |
| 75 | #endif |
| 76 | |
| 77 | #ifndef O_NOCTTY |
| 78 | # define O_NOCTTY 0 |
| 79 | #endif |
| 80 | |
| 81 | extern void initialize_all_files (void); |
| 82 | |
| 83 | #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt |
| 84 | #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix |
| 85 | #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix |
| 86 | |
| 87 | /* Default command line prompt. This is overriden in some configs. */ |
| 88 | |
| 89 | #ifndef DEFAULT_PROMPT |
| 90 | #define DEFAULT_PROMPT "(gdb) " |
| 91 | #endif |
| 92 | |
| 93 | /* Generate a function that exports a pointer to a field of the |
| 94 | current UI. */ |
| 95 | |
| 96 | #define gen_ret_current_ui_field_ptr(type, name) \ |
| 97 | type * \ |
| 98 | current_ui_## name ## _ptr (void) \ |
| 99 | { \ |
| 100 | return ¤t_ui->m_ ## name; \ |
| 101 | } |
| 102 | |
| 103 | gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdout) |
| 104 | gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdin) |
| 105 | gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stderr) |
| 106 | gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdlog) |
| 107 | gen_ret_current_ui_field_ptr (struct ui_out *, current_uiout) |
| 108 | |
| 109 | /* Initialization file name for gdb. This is host-dependent. */ |
| 110 | |
| 111 | const char gdbinit[] = GDBINIT; |
| 112 | |
| 113 | int inhibit_gdbinit = 0; |
| 114 | |
| 115 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 116 | |
| 117 | /* Flag for whether we want to confirm potentially dangerous |
| 118 | operations. Default is yes. */ |
| 119 | |
| 120 | int confirm = 1; |
| 121 | |
| 122 | static void |
| 123 | show_confirm (struct ui_file *file, int from_tty, |
| 124 | struct cmd_list_element *c, const char *value) |
| 125 | { |
| 126 | fprintf_filtered (file, _("Whether to confirm potentially " |
| 127 | "dangerous operations is %s.\n"), |
| 128 | value); |
| 129 | } |
| 130 | |
| 131 | /* Flag to indicate whether a user defined command is currently running. */ |
| 132 | |
| 133 | int in_user_command; |
| 134 | |
| 135 | /* Current working directory. */ |
| 136 | |
| 137 | char *current_directory; |
| 138 | |
| 139 | /* The directory name is actually stored here (usually). */ |
| 140 | char gdb_dirbuf[1024]; |
| 141 | |
| 142 | /* The last command line executed on the console. Used for command |
| 143 | repetitions. */ |
| 144 | char *saved_command_line; |
| 145 | |
| 146 | /* Nonzero if the current command is modified by "server ". This |
| 147 | affects things like recording into the command history, commands |
| 148 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
| 149 | whatever) can issue its own commands and also send along commands |
| 150 | from the user, and have the user not notice that the user interface |
| 151 | is issuing commands too. */ |
| 152 | int server_command; |
| 153 | |
| 154 | /* Timeout limit for response from target. */ |
| 155 | |
| 156 | /* The default value has been changed many times over the years. It |
| 157 | was originally 5 seconds. But that was thought to be a long time |
| 158 | to sit and wait, so it was changed to 2 seconds. That was thought |
| 159 | to be plenty unless the connection was going through some terminal |
| 160 | server or multiplexer or other form of hairy serial connection. |
| 161 | |
| 162 | In mid-1996, remote_timeout was moved from remote.c to top.c and |
| 163 | it began being used in other remote-* targets. It appears that the |
| 164 | default was changed to 20 seconds at that time, perhaps because the |
| 165 | Renesas E7000 ICE didn't always respond in a timely manner. |
| 166 | |
| 167 | But if 5 seconds is a long time to sit and wait for retransmissions, |
| 168 | 20 seconds is far worse. This demonstrates the difficulty of using |
| 169 | a single variable for all protocol timeouts. |
| 170 | |
| 171 | As remote.c is used much more than remote-e7000.c, it was changed |
| 172 | back to 2 seconds in 1999. */ |
| 173 | |
| 174 | int remote_timeout = 2; |
| 175 | |
| 176 | /* Non-zero tells remote* modules to output debugging info. */ |
| 177 | |
| 178 | int remote_debug = 0; |
| 179 | |
| 180 | /* Sbrk location on entry to main. Used for statistics only. */ |
| 181 | #ifdef HAVE_SBRK |
| 182 | char *lim_at_start; |
| 183 | #endif |
| 184 | |
| 185 | /* Hooks for alternate command interfaces. */ |
| 186 | |
| 187 | /* This hook is called from within gdb's many mini-event loops which |
| 188 | could steal control from a real user interface's event loop. It |
| 189 | returns non-zero if the user is requesting a detach, zero |
| 190 | otherwise. */ |
| 191 | |
| 192 | int (*deprecated_ui_loop_hook) (int); |
| 193 | |
| 194 | |
| 195 | /* Called from print_frame_info to list the line we stopped in. */ |
| 196 | |
| 197 | void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, |
| 198 | int line, |
| 199 | int stopline, |
| 200 | int noerror); |
| 201 | /* Replaces most of query. */ |
| 202 | |
| 203 | int (*deprecated_query_hook) (const char *, va_list); |
| 204 | |
| 205 | /* Replaces most of warning. */ |
| 206 | |
| 207 | void (*deprecated_warning_hook) (const char *, va_list); |
| 208 | |
| 209 | /* These three functions support getting lines of text from the user. |
| 210 | They are used in sequence. First deprecated_readline_begin_hook is |
| 211 | called with a text string that might be (for example) a message for |
| 212 | the user to type in a sequence of commands to be executed at a |
| 213 | breakpoint. If this function calls back to a GUI, it might take |
| 214 | this opportunity to pop up a text interaction window with this |
| 215 | message. Next, deprecated_readline_hook is called with a prompt |
| 216 | that is emitted prior to collecting the user input. It can be |
| 217 | called multiple times. Finally, deprecated_readline_end_hook is |
| 218 | called to notify the GUI that we are done with the interaction |
| 219 | window and it can close it. */ |
| 220 | |
| 221 | void (*deprecated_readline_begin_hook) (char *, ...); |
| 222 | char *(*deprecated_readline_hook) (const char *); |
| 223 | void (*deprecated_readline_end_hook) (void); |
| 224 | |
| 225 | /* Called as appropriate to notify the interface that we have attached |
| 226 | to or detached from an already running process. */ |
| 227 | |
| 228 | void (*deprecated_attach_hook) (void); |
| 229 | void (*deprecated_detach_hook) (void); |
| 230 | |
| 231 | /* Called during long calculations to allow GUI to repair window |
| 232 | damage, and to check for stop buttons, etc... */ |
| 233 | |
| 234 | void (*deprecated_interactive_hook) (void); |
| 235 | |
| 236 | /* Called when going to wait for the target. Usually allows the GUI |
| 237 | to run while waiting for target events. */ |
| 238 | |
| 239 | ptid_t (*deprecated_target_wait_hook) (ptid_t ptid, |
| 240 | struct target_waitstatus *status, |
| 241 | int options); |
| 242 | |
| 243 | /* Used by UI as a wrapper around command execution. May do various |
| 244 | things like enabling/disabling buttons, etc... */ |
| 245 | |
| 246 | void (*deprecated_call_command_hook) (struct cmd_list_element * c, |
| 247 | char *cmd, int from_tty); |
| 248 | |
| 249 | /* Called when the current thread changes. Argument is thread id. */ |
| 250 | |
| 251 | void (*deprecated_context_hook) (int id); |
| 252 | |
| 253 | /* The highest UI number ever assigned. */ |
| 254 | static int highest_ui_num; |
| 255 | |
| 256 | /* See top.h. */ |
| 257 | |
| 258 | struct ui * |
| 259 | new_ui (FILE *instream, FILE *outstream, FILE *errstream) |
| 260 | { |
| 261 | struct ui *ui; |
| 262 | |
| 263 | ui = XCNEW (struct ui); |
| 264 | |
| 265 | ui->num = ++highest_ui_num; |
| 266 | ui->stdin_stream = instream; |
| 267 | ui->instream = instream; |
| 268 | ui->outstream = outstream; |
| 269 | ui->errstream = errstream; |
| 270 | |
| 271 | ui->input_fd = fileno (ui->instream); |
| 272 | |
| 273 | ui->input_interactive_p = ISATTY (ui->instream); |
| 274 | |
| 275 | ui->m_gdb_stdin = new stdio_file (ui->instream); |
| 276 | ui->m_gdb_stdout = new stdio_file (ui->outstream); |
| 277 | ui->m_gdb_stderr = new stderr_file (ui->errstream); |
| 278 | ui->m_gdb_stdlog = ui->m_gdb_stderr; |
| 279 | |
| 280 | ui->prompt_state = PROMPT_NEEDED; |
| 281 | |
| 282 | if (ui_list == NULL) |
| 283 | ui_list = ui; |
| 284 | else |
| 285 | { |
| 286 | struct ui *last; |
| 287 | |
| 288 | for (last = ui_list; last->next != NULL; last = last->next) |
| 289 | ; |
| 290 | last->next = ui; |
| 291 | } |
| 292 | |
| 293 | return ui; |
| 294 | } |
| 295 | |
| 296 | static void |
| 297 | free_ui (struct ui *ui) |
| 298 | { |
| 299 | delete ui->m_gdb_stdin; |
| 300 | delete ui->m_gdb_stdout; |
| 301 | delete ui->m_gdb_stderr; |
| 302 | |
| 303 | xfree (ui); |
| 304 | } |
| 305 | |
| 306 | void |
| 307 | delete_ui (struct ui *todel) |
| 308 | { |
| 309 | struct ui *ui, *uiprev; |
| 310 | |
| 311 | uiprev = NULL; |
| 312 | |
| 313 | for (ui = ui_list; ui != NULL; uiprev = ui, ui = ui->next) |
| 314 | if (ui == todel) |
| 315 | break; |
| 316 | |
| 317 | gdb_assert (ui != NULL); |
| 318 | |
| 319 | if (uiprev != NULL) |
| 320 | uiprev->next = ui->next; |
| 321 | else |
| 322 | ui_list = ui->next; |
| 323 | |
| 324 | free_ui (ui); |
| 325 | } |
| 326 | |
| 327 | /* Cleanup that deletes a UI. */ |
| 328 | |
| 329 | static void |
| 330 | delete_ui_cleanup (void *void_ui) |
| 331 | { |
| 332 | struct ui *ui = (struct ui *) void_ui; |
| 333 | |
| 334 | delete_ui (ui); |
| 335 | } |
| 336 | |
| 337 | /* See top.h. */ |
| 338 | |
| 339 | struct cleanup * |
| 340 | make_delete_ui_cleanup (struct ui *ui) |
| 341 | { |
| 342 | return make_cleanup (delete_ui_cleanup, ui); |
| 343 | } |
| 344 | |
| 345 | /* Open file named NAME for read/write, making sure not to make it the |
| 346 | controlling terminal. */ |
| 347 | |
| 348 | static FILE * |
| 349 | open_terminal_stream (const char *name) |
| 350 | { |
| 351 | int fd; |
| 352 | |
| 353 | fd = open (name, O_RDWR | O_NOCTTY); |
| 354 | if (fd < 0) |
| 355 | perror_with_name (_("opening terminal failed")); |
| 356 | |
| 357 | return fdopen (fd, "w+"); |
| 358 | } |
| 359 | |
| 360 | /* Implementation of the "new-ui" command. */ |
| 361 | |
| 362 | static void |
| 363 | new_ui_command (char *args, int from_tty) |
| 364 | { |
| 365 | struct ui *ui; |
| 366 | struct interp *interp; |
| 367 | FILE *stream[3] = { NULL, NULL, NULL }; |
| 368 | int i; |
| 369 | int res; |
| 370 | int argc; |
| 371 | char **argv; |
| 372 | const char *interpreter_name; |
| 373 | const char *tty_name; |
| 374 | struct cleanup *success_chain; |
| 375 | struct cleanup *failure_chain; |
| 376 | |
| 377 | dont_repeat (); |
| 378 | |
| 379 | argv = gdb_buildargv (args); |
| 380 | success_chain = make_cleanup_freeargv (argv); |
| 381 | argc = countargv (argv); |
| 382 | |
| 383 | if (argc < 2) |
| 384 | error (_("usage: new-ui <interpreter> <tty>")); |
| 385 | |
| 386 | interpreter_name = argv[0]; |
| 387 | tty_name = argv[1]; |
| 388 | |
| 389 | { |
| 390 | scoped_restore save_ui = make_scoped_restore (¤t_ui); |
| 391 | |
| 392 | failure_chain = make_cleanup (null_cleanup, NULL); |
| 393 | |
| 394 | /* Open specified terminal, once for each of |
| 395 | stdin/stdout/stderr. */ |
| 396 | for (i = 0; i < 3; i++) |
| 397 | { |
| 398 | stream[i] = open_terminal_stream (tty_name); |
| 399 | make_cleanup_fclose (stream[i]); |
| 400 | } |
| 401 | |
| 402 | ui = new_ui (stream[0], stream[1], stream[2]); |
| 403 | make_cleanup (delete_ui_cleanup, ui); |
| 404 | |
| 405 | ui->async = 1; |
| 406 | |
| 407 | current_ui = ui; |
| 408 | |
| 409 | set_top_level_interpreter (interpreter_name); |
| 410 | |
| 411 | interp_pre_command_loop (top_level_interpreter ()); |
| 412 | |
| 413 | discard_cleanups (failure_chain); |
| 414 | |
| 415 | /* This restores the previous UI and frees argv. */ |
| 416 | do_cleanups (success_chain); |
| 417 | } |
| 418 | |
| 419 | printf_unfiltered ("New UI allocated\n"); |
| 420 | } |
| 421 | |
| 422 | /* Handler for SIGHUP. */ |
| 423 | |
| 424 | #ifdef SIGHUP |
| 425 | /* NOTE 1999-04-29: This function will be static again, once we modify |
| 426 | gdb to use the event loop as the default command loop and we merge |
| 427 | event-top.c into this file, top.c. */ |
| 428 | /* static */ void |
| 429 | quit_cover (void) |
| 430 | { |
| 431 | /* Stop asking user for confirmation --- we're exiting. This |
| 432 | prevents asking the user dumb questions. */ |
| 433 | confirm = 0; |
| 434 | quit_command ((char *) 0, 0); |
| 435 | } |
| 436 | #endif /* defined SIGHUP */ |
| 437 | \f |
| 438 | /* Line number we are currently in, in a file which is being sourced. */ |
| 439 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 440 | gdb to use the event loop as the default command loop and we merge |
| 441 | event-top.c into this file, top.c. */ |
| 442 | /* static */ int source_line_number; |
| 443 | |
| 444 | /* Name of the file we are sourcing. */ |
| 445 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 446 | gdb to use the event loop as the default command loop and we merge |
| 447 | event-top.c into this file, top.c. */ |
| 448 | /* static */ const char *source_file_name; |
| 449 | |
| 450 | /* Clean up on error during a "source" command (or execution of a |
| 451 | user-defined command). */ |
| 452 | |
| 453 | void |
| 454 | do_restore_instream_cleanup (void *stream) |
| 455 | { |
| 456 | struct ui *ui = current_ui; |
| 457 | |
| 458 | /* Restore the previous input stream. */ |
| 459 | ui->instream = (FILE *) stream; |
| 460 | } |
| 461 | |
| 462 | /* Read commands from STREAM. */ |
| 463 | void |
| 464 | read_command_file (FILE *stream) |
| 465 | { |
| 466 | struct ui *ui = current_ui; |
| 467 | struct cleanup *cleanups; |
| 468 | |
| 469 | cleanups = make_cleanup (do_restore_instream_cleanup, ui->instream); |
| 470 | ui->instream = stream; |
| 471 | |
| 472 | /* Read commands from `instream' and execute them until end of file |
| 473 | or error reading instream. */ |
| 474 | |
| 475 | while (ui->instream != NULL && !feof (ui->instream)) |
| 476 | { |
| 477 | char *command; |
| 478 | |
| 479 | /* Get a command-line. This calls the readline package. */ |
| 480 | command = command_line_input (NULL, 0, NULL); |
| 481 | if (command == NULL) |
| 482 | break; |
| 483 | command_handler (command); |
| 484 | } |
| 485 | |
| 486 | do_cleanups (cleanups); |
| 487 | } |
| 488 | \f |
| 489 | void (*pre_init_ui_hook) (void); |
| 490 | |
| 491 | #ifdef __MSDOS__ |
| 492 | static void |
| 493 | do_chdir_cleanup (void *old_dir) |
| 494 | { |
| 495 | chdir ((const char *) old_dir); |
| 496 | xfree (old_dir); |
| 497 | } |
| 498 | #endif |
| 499 | |
| 500 | struct cleanup * |
| 501 | prepare_execute_command (void) |
| 502 | { |
| 503 | struct value *mark; |
| 504 | struct cleanup *cleanup; |
| 505 | |
| 506 | mark = value_mark (); |
| 507 | cleanup = make_cleanup_value_free_to_mark (mark); |
| 508 | |
| 509 | /* With multiple threads running while the one we're examining is |
| 510 | stopped, the dcache can get stale without us being able to detect |
| 511 | it. For the duration of the command, though, use the dcache to |
| 512 | help things like backtrace. */ |
| 513 | if (non_stop) |
| 514 | target_dcache_invalidate (); |
| 515 | |
| 516 | return cleanup; |
| 517 | } |
| 518 | |
| 519 | /* Tell the user if the language has changed (except first time) after |
| 520 | executing a command. */ |
| 521 | |
| 522 | void |
| 523 | check_frame_language_change (void) |
| 524 | { |
| 525 | static int warned = 0; |
| 526 | struct frame_info *frame; |
| 527 | |
| 528 | /* First make sure that a new frame has been selected, in case the |
| 529 | command or the hooks changed the program state. */ |
| 530 | frame = deprecated_safe_get_selected_frame (); |
| 531 | if (current_language != expected_language) |
| 532 | { |
| 533 | if (language_mode == language_mode_auto && info_verbose) |
| 534 | { |
| 535 | language_info (1); /* Print what changed. */ |
| 536 | } |
| 537 | warned = 0; |
| 538 | } |
| 539 | |
| 540 | /* Warn the user if the working language does not match the language |
| 541 | of the current frame. Only warn the user if we are actually |
| 542 | running the program, i.e. there is a stack. */ |
| 543 | /* FIXME: This should be cacheing the frame and only running when |
| 544 | the frame changes. */ |
| 545 | |
| 546 | if (has_stack_frames ()) |
| 547 | { |
| 548 | enum language flang; |
| 549 | |
| 550 | flang = get_frame_language (frame); |
| 551 | if (!warned |
| 552 | && flang != language_unknown |
| 553 | && flang != current_language->la_language) |
| 554 | { |
| 555 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 556 | warned = 1; |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | /* See top.h. */ |
| 562 | |
| 563 | void |
| 564 | wait_sync_command_done (void) |
| 565 | { |
| 566 | /* Processing events may change the current UI. */ |
| 567 | scoped_restore save_ui = make_scoped_restore (¤t_ui); |
| 568 | struct ui *ui = current_ui; |
| 569 | |
| 570 | while (gdb_do_one_event () >= 0) |
| 571 | if (ui->prompt_state != PROMPT_BLOCKED) |
| 572 | break; |
| 573 | } |
| 574 | |
| 575 | /* See top.h. */ |
| 576 | |
| 577 | void |
| 578 | maybe_wait_sync_command_done (int was_sync) |
| 579 | { |
| 580 | /* If the interpreter is in sync mode (we're running a user |
| 581 | command's list, running command hooks or similars), and we |
| 582 | just ran a synchronous command that started the target, wait |
| 583 | for that command to end. */ |
| 584 | if (!current_ui->async |
| 585 | && !was_sync |
| 586 | && current_ui->prompt_state == PROMPT_BLOCKED) |
| 587 | wait_sync_command_done (); |
| 588 | } |
| 589 | |
| 590 | /* Execute the line P as a command, in the current user context. |
| 591 | Pass FROM_TTY as second argument to the defining function. */ |
| 592 | |
| 593 | void |
| 594 | execute_command (char *p, int from_tty) |
| 595 | { |
| 596 | struct cleanup *cleanup_if_error, *cleanup; |
| 597 | struct cmd_list_element *c; |
| 598 | char *line; |
| 599 | |
| 600 | cleanup_if_error = make_bpstat_clear_actions_cleanup (); |
| 601 | cleanup = prepare_execute_command (); |
| 602 | |
| 603 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 604 | a builtin alloca. */ |
| 605 | alloca (0); |
| 606 | |
| 607 | /* This can happen when command_line_input hits end of file. */ |
| 608 | if (p == NULL) |
| 609 | { |
| 610 | do_cleanups (cleanup); |
| 611 | discard_cleanups (cleanup_if_error); |
| 612 | return; |
| 613 | } |
| 614 | |
| 615 | target_log_command (p); |
| 616 | |
| 617 | while (*p == ' ' || *p == '\t') |
| 618 | p++; |
| 619 | if (*p) |
| 620 | { |
| 621 | const char *cmd = p; |
| 622 | char *arg; |
| 623 | int was_sync = current_ui->prompt_state == PROMPT_BLOCKED; |
| 624 | |
| 625 | line = p; |
| 626 | |
| 627 | /* If trace-commands is set then this will print this command. */ |
| 628 | print_command_trace (p); |
| 629 | |
| 630 | c = lookup_cmd (&cmd, cmdlist, "", 0, 1); |
| 631 | p = (char *) cmd; |
| 632 | |
| 633 | /* Pass null arg rather than an empty one. */ |
| 634 | arg = *p ? p : 0; |
| 635 | |
| 636 | /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
| 637 | while the is_complete_command(cfunc) test is just plain |
| 638 | bogus. They should both be replaced by a test of the form |
| 639 | c->strip_trailing_white_space_p. */ |
| 640 | /* NOTE: cagney/2002-02-02: The function.cfunc in the below |
| 641 | can't be replaced with func. This is because it is the |
| 642 | cfunc, and not the func, that has the value that the |
| 643 | is_complete_command hack is testing for. */ |
| 644 | /* Clear off trailing whitespace, except for set and complete |
| 645 | command. */ |
| 646 | if (arg |
| 647 | && c->type != set_cmd |
| 648 | && !is_complete_command (c)) |
| 649 | { |
| 650 | p = arg + strlen (arg) - 1; |
| 651 | while (p >= arg && (*p == ' ' || *p == '\t')) |
| 652 | p--; |
| 653 | *(p + 1) = '\0'; |
| 654 | } |
| 655 | |
| 656 | /* If this command has been pre-hooked, run the hook first. */ |
| 657 | execute_cmd_pre_hook (c); |
| 658 | |
| 659 | if (c->deprecated_warn_user) |
| 660 | deprecated_cmd_warning (line); |
| 661 | |
| 662 | /* c->user_commands would be NULL in the case of a python command. */ |
| 663 | if (c->theclass == class_user && c->user_commands) |
| 664 | execute_user_command (c, arg); |
| 665 | else if (c->type == set_cmd) |
| 666 | do_set_command (arg, from_tty, c); |
| 667 | else if (c->type == show_cmd) |
| 668 | do_show_command (arg, from_tty, c); |
| 669 | else if (!cmd_func_p (c)) |
| 670 | error (_("That is not a command, just a help topic.")); |
| 671 | else if (deprecated_call_command_hook) |
| 672 | deprecated_call_command_hook (c, arg, from_tty); |
| 673 | else |
| 674 | cmd_func (c, arg, from_tty); |
| 675 | |
| 676 | maybe_wait_sync_command_done (was_sync); |
| 677 | |
| 678 | /* If this command has been post-hooked, run the hook last. */ |
| 679 | execute_cmd_post_hook (c); |
| 680 | |
| 681 | } |
| 682 | |
| 683 | check_frame_language_change (); |
| 684 | |
| 685 | do_cleanups (cleanup); |
| 686 | discard_cleanups (cleanup_if_error); |
| 687 | } |
| 688 | |
| 689 | /* Run execute_command for P and FROM_TTY. Capture its output into the |
| 690 | returned string, do not display it to the screen. BATCH_FLAG will be |
| 691 | temporarily set to true. */ |
| 692 | |
| 693 | std::string |
| 694 | execute_command_to_string (char *p, int from_tty) |
| 695 | { |
| 696 | struct cleanup *cleanup; |
| 697 | |
| 698 | /* GDB_STDOUT should be better already restored during these |
| 699 | restoration callbacks. */ |
| 700 | cleanup = set_batch_flag_and_make_cleanup_restore_page_info (); |
| 701 | |
| 702 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
| 703 | |
| 704 | string_file str_file; |
| 705 | |
| 706 | current_uiout->redirect (&str_file); |
| 707 | make_cleanup_ui_out_redirect_pop (current_uiout); |
| 708 | |
| 709 | scoped_restore save_stdout |
| 710 | = make_scoped_restore (&gdb_stdout, &str_file); |
| 711 | scoped_restore save_stderr |
| 712 | = make_scoped_restore (&gdb_stderr, &str_file); |
| 713 | scoped_restore save_stdlog |
| 714 | = make_scoped_restore (&gdb_stdlog, &str_file); |
| 715 | scoped_restore save_stdtarg |
| 716 | = make_scoped_restore (&gdb_stdtarg, &str_file); |
| 717 | scoped_restore save_stdtargerr |
| 718 | = make_scoped_restore (&gdb_stdtargerr, &str_file); |
| 719 | |
| 720 | execute_command (p, from_tty); |
| 721 | |
| 722 | do_cleanups (cleanup); |
| 723 | |
| 724 | return std::move (str_file.string ()); |
| 725 | } |
| 726 | |
| 727 | \f |
| 728 | /* When nonzero, cause dont_repeat to do nothing. This should only be |
| 729 | set via prevent_dont_repeat. */ |
| 730 | |
| 731 | static int suppress_dont_repeat = 0; |
| 732 | |
| 733 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 734 | |
| 735 | void |
| 736 | dont_repeat (void) |
| 737 | { |
| 738 | struct ui *ui = current_ui; |
| 739 | |
| 740 | if (suppress_dont_repeat || server_command) |
| 741 | return; |
| 742 | |
| 743 | /* If we aren't reading from standard input, we are saving the last |
| 744 | thing read from stdin in line and don't want to delete it. Null |
| 745 | lines won't repeat here in any case. */ |
| 746 | if (ui->instream == ui->stdin_stream) |
| 747 | *saved_command_line = 0; |
| 748 | } |
| 749 | |
| 750 | /* Prevent dont_repeat from working, and return a cleanup that |
| 751 | restores the previous state. */ |
| 752 | |
| 753 | scoped_restore_tmpl<int> |
| 754 | prevent_dont_repeat (void) |
| 755 | { |
| 756 | return make_scoped_restore (&suppress_dont_repeat, 1); |
| 757 | } |
| 758 | |
| 759 | \f |
| 760 | /* Read a line from the stream "instream" without command line editing. |
| 761 | |
| 762 | It prints PROMPT once at the start. |
| 763 | Action is compatible with "readline", e.g. space for the result is |
| 764 | malloc'd and should be freed by the caller. |
| 765 | |
| 766 | A NULL return means end of file. */ |
| 767 | |
| 768 | static char * |
| 769 | gdb_readline_no_editing (const char *prompt) |
| 770 | { |
| 771 | struct buffer line_buffer; |
| 772 | struct ui *ui = current_ui; |
| 773 | /* Read from stdin if we are executing a user defined command. This |
| 774 | is the right thing for prompt_for_continue, at least. */ |
| 775 | FILE *stream = ui->instream != NULL ? ui->instream : stdin; |
| 776 | int fd = fileno (stream); |
| 777 | |
| 778 | buffer_init (&line_buffer); |
| 779 | |
| 780 | if (prompt != NULL) |
| 781 | { |
| 782 | /* Don't use a _filtered function here. It causes the assumed |
| 783 | character position to be off, since the newline we read from |
| 784 | the user is not accounted for. */ |
| 785 | fputs_unfiltered (prompt, gdb_stdout); |
| 786 | gdb_flush (gdb_stdout); |
| 787 | } |
| 788 | |
| 789 | while (1) |
| 790 | { |
| 791 | int c; |
| 792 | int numfds; |
| 793 | fd_set readfds; |
| 794 | |
| 795 | QUIT; |
| 796 | |
| 797 | /* Wait until at least one byte of data is available. Control-C |
| 798 | can interrupt interruptible_select, but not fgetc. */ |
| 799 | FD_ZERO (&readfds); |
| 800 | FD_SET (fd, &readfds); |
| 801 | if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1) |
| 802 | { |
| 803 | if (errno == EINTR) |
| 804 | { |
| 805 | /* If this was ctrl-c, the QUIT above handles it. */ |
| 806 | continue; |
| 807 | } |
| 808 | perror_with_name (("select")); |
| 809 | } |
| 810 | |
| 811 | c = fgetc (stream); |
| 812 | |
| 813 | if (c == EOF) |
| 814 | { |
| 815 | if (line_buffer.used_size > 0) |
| 816 | /* The last line does not end with a newline. Return it, and |
| 817 | if we are called again fgetc will still return EOF and |
| 818 | we'll return NULL then. */ |
| 819 | break; |
| 820 | xfree (buffer_finish (&line_buffer)); |
| 821 | return NULL; |
| 822 | } |
| 823 | |
| 824 | if (c == '\n') |
| 825 | { |
| 826 | if (line_buffer.used_size > 0 |
| 827 | && line_buffer.buffer[line_buffer.used_size - 1] == '\r') |
| 828 | line_buffer.used_size--; |
| 829 | break; |
| 830 | } |
| 831 | |
| 832 | buffer_grow_char (&line_buffer, c); |
| 833 | } |
| 834 | |
| 835 | buffer_grow_char (&line_buffer, '\0'); |
| 836 | return buffer_finish (&line_buffer); |
| 837 | } |
| 838 | |
| 839 | /* Variables which control command line editing and history |
| 840 | substitution. These variables are given default values at the end |
| 841 | of this file. */ |
| 842 | static int command_editing_p; |
| 843 | |
| 844 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 845 | gdb to use the event loop as the default command loop and we merge |
| 846 | event-top.c into this file, top.c. */ |
| 847 | |
| 848 | /* static */ int history_expansion_p; |
| 849 | |
| 850 | static int write_history_p; |
| 851 | static void |
| 852 | show_write_history_p (struct ui_file *file, int from_tty, |
| 853 | struct cmd_list_element *c, const char *value) |
| 854 | { |
| 855 | fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"), |
| 856 | value); |
| 857 | } |
| 858 | |
| 859 | /* The variable associated with the "set/show history size" |
| 860 | command. The value -1 means unlimited, and -2 means undefined. */ |
| 861 | static int history_size_setshow_var = -2; |
| 862 | |
| 863 | static void |
| 864 | show_history_size (struct ui_file *file, int from_tty, |
| 865 | struct cmd_list_element *c, const char *value) |
| 866 | { |
| 867 | fprintf_filtered (file, _("The size of the command history is %s.\n"), |
| 868 | value); |
| 869 | } |
| 870 | |
| 871 | /* Variable associated with the "history remove-duplicates" option. |
| 872 | The value -1 means unlimited. */ |
| 873 | static int history_remove_duplicates = 0; |
| 874 | |
| 875 | static void |
| 876 | show_history_remove_duplicates (struct ui_file *file, int from_tty, |
| 877 | struct cmd_list_element *c, const char *value) |
| 878 | { |
| 879 | fprintf_filtered (file, |
| 880 | _("The number of history entries to look back at for " |
| 881 | "duplicates is %s.\n"), |
| 882 | value); |
| 883 | } |
| 884 | |
| 885 | static char *history_filename; |
| 886 | static void |
| 887 | show_history_filename (struct ui_file *file, int from_tty, |
| 888 | struct cmd_list_element *c, const char *value) |
| 889 | { |
| 890 | fprintf_filtered (file, _("The filename in which to record " |
| 891 | "the command history is \"%s\".\n"), |
| 892 | value); |
| 893 | } |
| 894 | |
| 895 | /* This is like readline(), but it has some gdb-specific behavior. |
| 896 | gdb may want readline in both the synchronous and async modes during |
| 897 | a single gdb invocation. At the ordinary top-level prompt we might |
| 898 | be using the async readline. That means we can't use |
| 899 | rl_pre_input_hook, since it doesn't work properly in async mode. |
| 900 | However, for a secondary prompt (" >", such as occurs during a |
| 901 | `define'), gdb wants a synchronous response. |
| 902 | |
| 903 | We used to call readline() directly, running it in synchronous |
| 904 | mode. But mixing modes this way is not supported, and as of |
| 905 | readline 5.x it no longer works; the arrow keys come unbound during |
| 906 | the synchronous call. So we make a nested call into the event |
| 907 | loop. That's what gdb_readline_wrapper is for. */ |
| 908 | |
| 909 | /* A flag set as soon as gdb_readline_wrapper_line is called; we can't |
| 910 | rely on gdb_readline_wrapper_result, which might still be NULL if |
| 911 | the user types Control-D for EOF. */ |
| 912 | static int gdb_readline_wrapper_done; |
| 913 | |
| 914 | /* The result of the current call to gdb_readline_wrapper, once a newline |
| 915 | is seen. */ |
| 916 | static char *gdb_readline_wrapper_result; |
| 917 | |
| 918 | /* Any intercepted hook. Operate-and-get-next sets this, expecting it |
| 919 | to be called after the newline is processed (which will redisplay |
| 920 | the prompt). But in gdb_readline_wrapper we will not get a new |
| 921 | prompt until the next call, or until we return to the event loop. |
| 922 | So we disable this hook around the newline and restore it before we |
| 923 | return. */ |
| 924 | static void (*saved_after_char_processing_hook) (void); |
| 925 | |
| 926 | |
| 927 | /* See top.h. */ |
| 928 | |
| 929 | int |
| 930 | gdb_in_secondary_prompt_p (struct ui *ui) |
| 931 | { |
| 932 | return ui->secondary_prompt_depth > 0; |
| 933 | } |
| 934 | |
| 935 | |
| 936 | /* This function is called when readline has seen a complete line of |
| 937 | text. */ |
| 938 | |
| 939 | static void |
| 940 | gdb_readline_wrapper_line (char *line) |
| 941 | { |
| 942 | gdb_assert (!gdb_readline_wrapper_done); |
| 943 | gdb_readline_wrapper_result = line; |
| 944 | gdb_readline_wrapper_done = 1; |
| 945 | |
| 946 | /* Prevent operate-and-get-next from acting too early. */ |
| 947 | saved_after_char_processing_hook = after_char_processing_hook; |
| 948 | after_char_processing_hook = NULL; |
| 949 | |
| 950 | /* Prevent parts of the prompt from being redisplayed if annotations |
| 951 | are enabled, and readline's state getting out of sync. We'll |
| 952 | reinstall the callback handler, which puts the terminal in raw |
| 953 | mode (or in readline lingo, in prepped state), when we're next |
| 954 | ready to process user input, either in display_gdb_prompt, or if |
| 955 | we're handling an asynchronous target event and running in the |
| 956 | background, just before returning to the event loop to process |
| 957 | further input (or more target events). */ |
| 958 | if (current_ui->command_editing) |
| 959 | gdb_rl_callback_handler_remove (); |
| 960 | } |
| 961 | |
| 962 | struct gdb_readline_wrapper_cleanup |
| 963 | { |
| 964 | void (*handler_orig) (char *); |
| 965 | int already_prompted_orig; |
| 966 | |
| 967 | /* Whether the target was async. */ |
| 968 | int target_is_async_orig; |
| 969 | }; |
| 970 | |
| 971 | static void |
| 972 | gdb_readline_wrapper_cleanup (void *arg) |
| 973 | { |
| 974 | struct ui *ui = current_ui; |
| 975 | struct gdb_readline_wrapper_cleanup *cleanup |
| 976 | = (struct gdb_readline_wrapper_cleanup *) arg; |
| 977 | |
| 978 | if (ui->command_editing) |
| 979 | rl_already_prompted = cleanup->already_prompted_orig; |
| 980 | |
| 981 | gdb_assert (ui->input_handler == gdb_readline_wrapper_line); |
| 982 | ui->input_handler = cleanup->handler_orig; |
| 983 | |
| 984 | /* Don't restore our input handler in readline yet. That would make |
| 985 | readline prep the terminal (putting it in raw mode), while the |
| 986 | line we just read may trigger execution of a command that expects |
| 987 | the terminal in the default cooked/canonical mode, such as e.g., |
| 988 | running Python's interactive online help utility. See |
| 989 | gdb_readline_wrapper_line for when we'll reinstall it. */ |
| 990 | |
| 991 | gdb_readline_wrapper_result = NULL; |
| 992 | gdb_readline_wrapper_done = 0; |
| 993 | ui->secondary_prompt_depth--; |
| 994 | gdb_assert (ui->secondary_prompt_depth >= 0); |
| 995 | |
| 996 | after_char_processing_hook = saved_after_char_processing_hook; |
| 997 | saved_after_char_processing_hook = NULL; |
| 998 | |
| 999 | if (cleanup->target_is_async_orig) |
| 1000 | target_async (1); |
| 1001 | |
| 1002 | xfree (cleanup); |
| 1003 | } |
| 1004 | |
| 1005 | char * |
| 1006 | gdb_readline_wrapper (const char *prompt) |
| 1007 | { |
| 1008 | struct ui *ui = current_ui; |
| 1009 | struct cleanup *back_to; |
| 1010 | struct gdb_readline_wrapper_cleanup *cleanup; |
| 1011 | char *retval; |
| 1012 | |
| 1013 | cleanup = XNEW (struct gdb_readline_wrapper_cleanup); |
| 1014 | cleanup->handler_orig = ui->input_handler; |
| 1015 | ui->input_handler = gdb_readline_wrapper_line; |
| 1016 | |
| 1017 | if (ui->command_editing) |
| 1018 | cleanup->already_prompted_orig = rl_already_prompted; |
| 1019 | else |
| 1020 | cleanup->already_prompted_orig = 0; |
| 1021 | |
| 1022 | cleanup->target_is_async_orig = target_is_async_p (); |
| 1023 | |
| 1024 | ui->secondary_prompt_depth++; |
| 1025 | back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup); |
| 1026 | |
| 1027 | /* Processing events may change the current UI. */ |
| 1028 | scoped_restore save_ui = make_scoped_restore (¤t_ui); |
| 1029 | |
| 1030 | if (cleanup->target_is_async_orig) |
| 1031 | target_async (0); |
| 1032 | |
| 1033 | /* Display our prompt and prevent double prompt display. Don't pass |
| 1034 | down a NULL prompt, since that has special meaning for |
| 1035 | display_gdb_prompt -- it indicates a request to print the primary |
| 1036 | prompt, while we want a secondary prompt here. */ |
| 1037 | display_gdb_prompt (prompt != NULL ? prompt : ""); |
| 1038 | if (ui->command_editing) |
| 1039 | rl_already_prompted = 1; |
| 1040 | |
| 1041 | if (after_char_processing_hook) |
| 1042 | (*after_char_processing_hook) (); |
| 1043 | gdb_assert (after_char_processing_hook == NULL); |
| 1044 | |
| 1045 | while (gdb_do_one_event () >= 0) |
| 1046 | if (gdb_readline_wrapper_done) |
| 1047 | break; |
| 1048 | |
| 1049 | retval = gdb_readline_wrapper_result; |
| 1050 | do_cleanups (back_to); |
| 1051 | return retval; |
| 1052 | } |
| 1053 | |
| 1054 | \f |
| 1055 | /* The current saved history number from operate-and-get-next. |
| 1056 | This is -1 if not valid. */ |
| 1057 | static int operate_saved_history = -1; |
| 1058 | |
| 1059 | /* This is put on the appropriate hook and helps operate-and-get-next |
| 1060 | do its work. */ |
| 1061 | static void |
| 1062 | gdb_rl_operate_and_get_next_completion (void) |
| 1063 | { |
| 1064 | int delta = where_history () - operate_saved_history; |
| 1065 | |
| 1066 | /* The `key' argument to rl_get_previous_history is ignored. */ |
| 1067 | rl_get_previous_history (delta, 0); |
| 1068 | operate_saved_history = -1; |
| 1069 | |
| 1070 | /* readline doesn't automatically update the display for us. */ |
| 1071 | rl_redisplay (); |
| 1072 | |
| 1073 | after_char_processing_hook = NULL; |
| 1074 | rl_pre_input_hook = NULL; |
| 1075 | } |
| 1076 | |
| 1077 | /* This is a gdb-local readline command handler. It accepts the |
| 1078 | current command line (like RET does) and, if this command was taken |
| 1079 | from the history, arranges for the next command in the history to |
| 1080 | appear on the command line when the prompt returns. |
| 1081 | We ignore the arguments. */ |
| 1082 | static int |
| 1083 | gdb_rl_operate_and_get_next (int count, int key) |
| 1084 | { |
| 1085 | int where; |
| 1086 | |
| 1087 | /* Use the async hook. */ |
| 1088 | after_char_processing_hook = gdb_rl_operate_and_get_next_completion; |
| 1089 | |
| 1090 | /* Find the current line, and find the next line to use. */ |
| 1091 | where = where_history(); |
| 1092 | |
| 1093 | if ((history_is_stifled () && (history_length >= history_max_entries)) |
| 1094 | || (where >= history_length - 1)) |
| 1095 | operate_saved_history = where; |
| 1096 | else |
| 1097 | operate_saved_history = where + 1; |
| 1098 | |
| 1099 | return rl_newline (1, key); |
| 1100 | } |
| 1101 | |
| 1102 | /* Number of user commands executed during this session. */ |
| 1103 | |
| 1104 | static int command_count = 0; |
| 1105 | |
| 1106 | /* Add the user command COMMAND to the input history list. */ |
| 1107 | |
| 1108 | void |
| 1109 | gdb_add_history (const char *command) |
| 1110 | { |
| 1111 | command_count++; |
| 1112 | |
| 1113 | if (history_remove_duplicates != 0) |
| 1114 | { |
| 1115 | int lookbehind; |
| 1116 | int lookbehind_threshold; |
| 1117 | |
| 1118 | /* The lookbehind threshold for finding a duplicate history entry is |
| 1119 | bounded by command_count because we can't meaningfully delete |
| 1120 | history entries that are already stored in the history file since |
| 1121 | the history file is appended to. */ |
| 1122 | if (history_remove_duplicates == -1 |
| 1123 | || history_remove_duplicates > command_count) |
| 1124 | lookbehind_threshold = command_count; |
| 1125 | else |
| 1126 | lookbehind_threshold = history_remove_duplicates; |
| 1127 | |
| 1128 | using_history (); |
| 1129 | for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++) |
| 1130 | { |
| 1131 | HIST_ENTRY *temp = previous_history (); |
| 1132 | |
| 1133 | if (temp == NULL) |
| 1134 | break; |
| 1135 | |
| 1136 | if (strcmp (temp->line, command) == 0) |
| 1137 | { |
| 1138 | HIST_ENTRY *prev = remove_history (where_history ()); |
| 1139 | command_count--; |
| 1140 | free_history_entry (prev); |
| 1141 | break; |
| 1142 | } |
| 1143 | } |
| 1144 | using_history (); |
| 1145 | } |
| 1146 | |
| 1147 | add_history (command); |
| 1148 | } |
| 1149 | |
| 1150 | /* Safely append new history entries to the history file in a corruption-free |
| 1151 | way using an intermediate local history file. */ |
| 1152 | |
| 1153 | static void |
| 1154 | gdb_safe_append_history (void) |
| 1155 | { |
| 1156 | int ret, saved_errno; |
| 1157 | char *local_history_filename; |
| 1158 | struct cleanup *old_chain; |
| 1159 | |
| 1160 | local_history_filename |
| 1161 | = xstrprintf ("%s-gdb%ld~", history_filename, (long) getpid ()); |
| 1162 | old_chain = make_cleanup (xfree, local_history_filename); |
| 1163 | |
| 1164 | ret = rename (history_filename, local_history_filename); |
| 1165 | saved_errno = errno; |
| 1166 | if (ret < 0 && saved_errno != ENOENT) |
| 1167 | { |
| 1168 | warning (_("Could not rename %s to %s: %s"), |
| 1169 | history_filename, local_history_filename, |
| 1170 | safe_strerror (saved_errno)); |
| 1171 | } |
| 1172 | else |
| 1173 | { |
| 1174 | if (ret < 0) |
| 1175 | { |
| 1176 | /* If the rename failed with ENOENT then either the global history |
| 1177 | file never existed in the first place or another GDB process is |
| 1178 | currently appending to it (and has thus temporarily renamed it). |
| 1179 | Since we can't distinguish between these two cases, we have to |
| 1180 | conservatively assume the first case and therefore must write out |
| 1181 | (not append) our known history to our local history file and try |
| 1182 | to move it back anyway. Otherwise a global history file would |
| 1183 | never get created! */ |
| 1184 | gdb_assert (saved_errno == ENOENT); |
| 1185 | write_history (local_history_filename); |
| 1186 | } |
| 1187 | else |
| 1188 | { |
| 1189 | append_history (command_count, local_history_filename); |
| 1190 | if (history_is_stifled ()) |
| 1191 | history_truncate_file (local_history_filename, history_max_entries); |
| 1192 | } |
| 1193 | |
| 1194 | ret = rename (local_history_filename, history_filename); |
| 1195 | saved_errno = errno; |
| 1196 | if (ret < 0 && saved_errno != EEXIST) |
| 1197 | warning (_("Could not rename %s to %s: %s"), |
| 1198 | local_history_filename, history_filename, |
| 1199 | safe_strerror (saved_errno)); |
| 1200 | } |
| 1201 | |
| 1202 | do_cleanups (old_chain); |
| 1203 | } |
| 1204 | |
| 1205 | /* Read one line from the command input stream `instream' into a local |
| 1206 | static buffer. The buffer is made bigger as necessary. Returns |
| 1207 | the address of the start of the line. |
| 1208 | |
| 1209 | NULL is returned for end of file. |
| 1210 | |
| 1211 | *If* input is from an interactive stream (stdin), the line read is |
| 1212 | copied into the global 'saved_command_line' so that it can be |
| 1213 | repeated. |
| 1214 | |
| 1215 | This routine either uses fancy command line editing or simple input |
| 1216 | as the user has requested. */ |
| 1217 | |
| 1218 | char * |
| 1219 | command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix) |
| 1220 | { |
| 1221 | static struct buffer cmd_line_buffer; |
| 1222 | static int cmd_line_buffer_initialized; |
| 1223 | struct ui *ui = current_ui; |
| 1224 | const char *prompt = prompt_arg; |
| 1225 | char *cmd; |
| 1226 | int from_tty = ui->instream == ui->stdin_stream; |
| 1227 | |
| 1228 | /* The annotation suffix must be non-NULL. */ |
| 1229 | if (annotation_suffix == NULL) |
| 1230 | annotation_suffix = ""; |
| 1231 | |
| 1232 | if (from_tty && annotation_level > 1) |
| 1233 | { |
| 1234 | char *local_prompt; |
| 1235 | |
| 1236 | local_prompt |
| 1237 | = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt)) |
| 1238 | + strlen (annotation_suffix) + 40); |
| 1239 | if (prompt == NULL) |
| 1240 | local_prompt[0] = '\0'; |
| 1241 | else |
| 1242 | strcpy (local_prompt, prompt); |
| 1243 | strcat (local_prompt, "\n\032\032"); |
| 1244 | strcat (local_prompt, annotation_suffix); |
| 1245 | strcat (local_prompt, "\n"); |
| 1246 | |
| 1247 | prompt = local_prompt; |
| 1248 | } |
| 1249 | |
| 1250 | if (!cmd_line_buffer_initialized) |
| 1251 | { |
| 1252 | buffer_init (&cmd_line_buffer); |
| 1253 | cmd_line_buffer_initialized = 1; |
| 1254 | } |
| 1255 | |
| 1256 | /* Starting a new command line. */ |
| 1257 | cmd_line_buffer.used_size = 0; |
| 1258 | |
| 1259 | #ifdef STOP_SIGNAL |
| 1260 | if (job_control) |
| 1261 | signal (STOP_SIGNAL, handle_stop_sig); |
| 1262 | #endif |
| 1263 | |
| 1264 | while (1) |
| 1265 | { |
| 1266 | char *rl; |
| 1267 | |
| 1268 | /* Make sure that all output has been output. Some machines may |
| 1269 | let you get away with leaving out some of the gdb_flush, but |
| 1270 | not all. */ |
| 1271 | wrap_here (""); |
| 1272 | gdb_flush (gdb_stdout); |
| 1273 | gdb_flush (gdb_stderr); |
| 1274 | |
| 1275 | if (source_file_name != NULL) |
| 1276 | ++source_line_number; |
| 1277 | |
| 1278 | if (from_tty && annotation_level > 1) |
| 1279 | { |
| 1280 | puts_unfiltered ("\n\032\032pre-"); |
| 1281 | puts_unfiltered (annotation_suffix); |
| 1282 | puts_unfiltered ("\n"); |
| 1283 | } |
| 1284 | |
| 1285 | /* Don't use fancy stuff if not talking to stdin. */ |
| 1286 | if (deprecated_readline_hook |
| 1287 | && from_tty |
| 1288 | && input_interactive_p (current_ui)) |
| 1289 | { |
| 1290 | rl = (*deprecated_readline_hook) (prompt); |
| 1291 | } |
| 1292 | else if (command_editing_p |
| 1293 | && from_tty |
| 1294 | && input_interactive_p (current_ui)) |
| 1295 | { |
| 1296 | rl = gdb_readline_wrapper (prompt); |
| 1297 | } |
| 1298 | else |
| 1299 | { |
| 1300 | rl = gdb_readline_no_editing (prompt); |
| 1301 | } |
| 1302 | |
| 1303 | cmd = handle_line_of_input (&cmd_line_buffer, rl, |
| 1304 | repeat, annotation_suffix); |
| 1305 | if (cmd == (char *) EOF) |
| 1306 | { |
| 1307 | cmd = NULL; |
| 1308 | break; |
| 1309 | } |
| 1310 | if (cmd != NULL) |
| 1311 | break; |
| 1312 | |
| 1313 | /* Got partial input. I.e., got a line that ends with a |
| 1314 | continuation character (backslash). Suppress printing the |
| 1315 | prompt again. */ |
| 1316 | prompt = NULL; |
| 1317 | } |
| 1318 | |
| 1319 | #ifdef STOP_SIGNAL |
| 1320 | if (job_control) |
| 1321 | signal (STOP_SIGNAL, SIG_DFL); |
| 1322 | #endif |
| 1323 | |
| 1324 | return cmd; |
| 1325 | } |
| 1326 | \f |
| 1327 | /* Print the GDB banner. */ |
| 1328 | void |
| 1329 | print_gdb_version (struct ui_file *stream) |
| 1330 | { |
| 1331 | /* From GNU coding standards, first line is meant to be easy for a |
| 1332 | program to parse, and is just canonical program name and version |
| 1333 | number, which starts after last space. */ |
| 1334 | |
| 1335 | fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version); |
| 1336 | |
| 1337 | /* Second line is a copyright notice. */ |
| 1338 | |
| 1339 | fprintf_filtered (stream, |
| 1340 | "Copyright (C) 2017 Free Software Foundation, Inc.\n"); |
| 1341 | |
| 1342 | /* Following the copyright is a brief statement that the program is |
| 1343 | free software, that users are free to copy and change it on |
| 1344 | certain conditions, that it is covered by the GNU GPL, and that |
| 1345 | there is no warranty. */ |
| 1346 | |
| 1347 | fprintf_filtered (stream, "\ |
| 1348 | License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\ |
| 1349 | \nThis is free software: you are free to change and redistribute it.\n\ |
| 1350 | There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\ |
| 1351 | and \"show warranty\" for details.\n"); |
| 1352 | |
| 1353 | /* After the required info we print the configuration information. */ |
| 1354 | |
| 1355 | fprintf_filtered (stream, "This GDB was configured as \""); |
| 1356 | if (strcmp (host_name, target_name) != 0) |
| 1357 | { |
| 1358 | fprintf_filtered (stream, "--host=%s --target=%s", |
| 1359 | host_name, target_name); |
| 1360 | } |
| 1361 | else |
| 1362 | { |
| 1363 | fprintf_filtered (stream, "%s", host_name); |
| 1364 | } |
| 1365 | fprintf_filtered (stream, "\".\n\ |
| 1366 | Type \"show configuration\" for configuration details."); |
| 1367 | |
| 1368 | if (REPORT_BUGS_TO[0]) |
| 1369 | { |
| 1370 | fprintf_filtered (stream, |
| 1371 | _("\nFor bug reporting instructions, please see:\n")); |
| 1372 | fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO); |
| 1373 | } |
| 1374 | fprintf_filtered (stream, |
| 1375 | _("Find the GDB manual and other documentation \ |
| 1376 | resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n")); |
| 1377 | fprintf_filtered (stream, _("For help, type \"help\".\n")); |
| 1378 | fprintf_filtered (stream, _("Type \"apropos word\" to search for \ |
| 1379 | commands related to \"word\".")); |
| 1380 | } |
| 1381 | |
| 1382 | /* Print the details of GDB build-time configuration. */ |
| 1383 | void |
| 1384 | print_gdb_configuration (struct ui_file *stream) |
| 1385 | { |
| 1386 | fprintf_filtered (stream, _("\ |
| 1387 | This GDB was configured as follows:\n\ |
| 1388 | configure --host=%s --target=%s\n\ |
| 1389 | "), host_name, target_name); |
| 1390 | fprintf_filtered (stream, _("\ |
| 1391 | --with-auto-load-dir=%s\n\ |
| 1392 | --with-auto-load-safe-path=%s\n\ |
| 1393 | "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH); |
| 1394 | #if HAVE_LIBEXPAT |
| 1395 | fprintf_filtered (stream, _("\ |
| 1396 | --with-expat\n\ |
| 1397 | ")); |
| 1398 | #else |
| 1399 | fprintf_filtered (stream, _("\ |
| 1400 | --without-expat\n\ |
| 1401 | ")); |
| 1402 | #endif |
| 1403 | if (GDB_DATADIR[0]) |
| 1404 | fprintf_filtered (stream, _("\ |
| 1405 | --with-gdb-datadir=%s%s\n\ |
| 1406 | "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1407 | #ifdef ICONV_BIN |
| 1408 | fprintf_filtered (stream, _("\ |
| 1409 | --with-iconv-bin=%s%s\n\ |
| 1410 | "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : ""); |
| 1411 | #endif |
| 1412 | if (JIT_READER_DIR[0]) |
| 1413 | fprintf_filtered (stream, _("\ |
| 1414 | --with-jit-reader-dir=%s%s\n\ |
| 1415 | "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1416 | #if HAVE_LIBUNWIND_IA64_H |
| 1417 | fprintf_filtered (stream, _("\ |
| 1418 | --with-libunwind-ia64\n\ |
| 1419 | ")); |
| 1420 | #else |
| 1421 | fprintf_filtered (stream, _("\ |
| 1422 | --without-libunwind-ia64\n\ |
| 1423 | ")); |
| 1424 | #endif |
| 1425 | #if HAVE_LIBLZMA |
| 1426 | fprintf_filtered (stream, _("\ |
| 1427 | --with-lzma\n\ |
| 1428 | ")); |
| 1429 | #else |
| 1430 | fprintf_filtered (stream, _("\ |
| 1431 | --without-lzma\n\ |
| 1432 | ")); |
| 1433 | #endif |
| 1434 | #ifdef WITH_PYTHON_PATH |
| 1435 | fprintf_filtered (stream, _("\ |
| 1436 | --with-python=%s%s\n\ |
| 1437 | "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : ""); |
| 1438 | #endif |
| 1439 | #if HAVE_GUILE |
| 1440 | fprintf_filtered (stream, _("\ |
| 1441 | --with-guile\n\ |
| 1442 | ")); |
| 1443 | #else |
| 1444 | fprintf_filtered (stream, _("\ |
| 1445 | --without-guile\n\ |
| 1446 | ")); |
| 1447 | #endif |
| 1448 | #ifdef RELOC_SRCDIR |
| 1449 | fprintf_filtered (stream, _("\ |
| 1450 | --with-relocated-sources=%s\n\ |
| 1451 | "), RELOC_SRCDIR); |
| 1452 | #endif |
| 1453 | if (DEBUGDIR[0]) |
| 1454 | fprintf_filtered (stream, _("\ |
| 1455 | --with-separate-debug-dir=%s%s\n\ |
| 1456 | "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1457 | if (TARGET_SYSTEM_ROOT[0]) |
| 1458 | fprintf_filtered (stream, _("\ |
| 1459 | --with-sysroot=%s%s\n\ |
| 1460 | "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : ""); |
| 1461 | if (SYSTEM_GDBINIT[0]) |
| 1462 | fprintf_filtered (stream, _("\ |
| 1463 | --with-system-gdbinit=%s%s\n\ |
| 1464 | "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : ""); |
| 1465 | #if HAVE_LIBBABELTRACE |
| 1466 | fprintf_filtered (stream, _("\ |
| 1467 | --with-babeltrace\n\ |
| 1468 | ")); |
| 1469 | #else |
| 1470 | fprintf_filtered (stream, _("\ |
| 1471 | --without-babeltrace\n\ |
| 1472 | ")); |
| 1473 | #endif |
| 1474 | /* We assume "relocatable" will be printed at least once, thus we always |
| 1475 | print this text. It's a reasonably safe assumption for now. */ |
| 1476 | fprintf_filtered (stream, _("\n\ |
| 1477 | (\"Relocatable\" means the directory can be moved with the GDB installation\n\ |
| 1478 | tree, and GDB will still find it.)\n\ |
| 1479 | ")); |
| 1480 | } |
| 1481 | \f |
| 1482 | |
| 1483 | /* The current top level prompt, settable with "set prompt", and/or |
| 1484 | with the python `gdb.prompt_hook' hook. */ |
| 1485 | static char *top_prompt; |
| 1486 | |
| 1487 | /* Access method for the GDB prompt string. */ |
| 1488 | |
| 1489 | char * |
| 1490 | get_prompt (void) |
| 1491 | { |
| 1492 | return top_prompt; |
| 1493 | } |
| 1494 | |
| 1495 | /* Set method for the GDB prompt string. */ |
| 1496 | |
| 1497 | void |
| 1498 | set_prompt (const char *s) |
| 1499 | { |
| 1500 | char *p = xstrdup (s); |
| 1501 | |
| 1502 | xfree (top_prompt); |
| 1503 | top_prompt = p; |
| 1504 | } |
| 1505 | \f |
| 1506 | |
| 1507 | struct qt_args |
| 1508 | { |
| 1509 | char *args; |
| 1510 | int from_tty; |
| 1511 | }; |
| 1512 | |
| 1513 | /* Callback for iterate_over_inferiors. Kills or detaches the given |
| 1514 | inferior, depending on how we originally gained control of it. */ |
| 1515 | |
| 1516 | static int |
| 1517 | kill_or_detach (struct inferior *inf, void *args) |
| 1518 | { |
| 1519 | struct qt_args *qt = (struct qt_args *) args; |
| 1520 | struct thread_info *thread; |
| 1521 | |
| 1522 | if (inf->pid == 0) |
| 1523 | return 0; |
| 1524 | |
| 1525 | thread = any_thread_of_process (inf->pid); |
| 1526 | if (thread != NULL) |
| 1527 | { |
| 1528 | switch_to_thread (thread->ptid); |
| 1529 | |
| 1530 | /* Leave core files alone. */ |
| 1531 | if (target_has_execution) |
| 1532 | { |
| 1533 | if (inf->attach_flag) |
| 1534 | target_detach (qt->args, qt->from_tty); |
| 1535 | else |
| 1536 | target_kill (); |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | return 0; |
| 1541 | } |
| 1542 | |
| 1543 | /* Callback for iterate_over_inferiors. Prints info about what GDB |
| 1544 | will do to each inferior on a "quit". ARG points to a struct |
| 1545 | ui_out where output is to be collected. */ |
| 1546 | |
| 1547 | static int |
| 1548 | print_inferior_quit_action (struct inferior *inf, void *arg) |
| 1549 | { |
| 1550 | struct ui_file *stb = (struct ui_file *) arg; |
| 1551 | |
| 1552 | if (inf->pid == 0) |
| 1553 | return 0; |
| 1554 | |
| 1555 | if (inf->attach_flag) |
| 1556 | fprintf_filtered (stb, |
| 1557 | _("\tInferior %d [%s] will be detached.\n"), inf->num, |
| 1558 | target_pid_to_str (pid_to_ptid (inf->pid))); |
| 1559 | else |
| 1560 | fprintf_filtered (stb, |
| 1561 | _("\tInferior %d [%s] will be killed.\n"), inf->num, |
| 1562 | target_pid_to_str (pid_to_ptid (inf->pid))); |
| 1563 | |
| 1564 | return 0; |
| 1565 | } |
| 1566 | |
| 1567 | /* If necessary, make the user confirm that we should quit. Return |
| 1568 | non-zero if we should quit, zero if we shouldn't. */ |
| 1569 | |
| 1570 | int |
| 1571 | quit_confirm (void) |
| 1572 | { |
| 1573 | /* Don't even ask if we're only debugging a core file inferior. */ |
| 1574 | if (!have_live_inferiors ()) |
| 1575 | return 1; |
| 1576 | |
| 1577 | /* Build the query string as a single string. */ |
| 1578 | string_file stb; |
| 1579 | |
| 1580 | stb.puts (_("A debugging session is active.\n\n")); |
| 1581 | iterate_over_inferiors (print_inferior_quit_action, &stb); |
| 1582 | stb.puts (_("\nQuit anyway? ")); |
| 1583 | |
| 1584 | return query ("%s", stb.c_str ()); |
| 1585 | } |
| 1586 | |
| 1587 | /* Prepare to exit GDB cleanly by undoing any changes made to the |
| 1588 | terminal so that we leave the terminal in the state we acquired it. */ |
| 1589 | |
| 1590 | static void |
| 1591 | undo_terminal_modifications_before_exit (void) |
| 1592 | { |
| 1593 | struct ui *saved_top_level = current_ui; |
| 1594 | |
| 1595 | target_terminal_ours (); |
| 1596 | |
| 1597 | current_ui = main_ui; |
| 1598 | |
| 1599 | #if defined(TUI) |
| 1600 | tui_disable (); |
| 1601 | #endif |
| 1602 | gdb_disable_readline (); |
| 1603 | |
| 1604 | current_ui = saved_top_level; |
| 1605 | } |
| 1606 | |
| 1607 | |
| 1608 | /* Quit without asking for confirmation. */ |
| 1609 | |
| 1610 | void |
| 1611 | quit_force (int *exit_arg, int from_tty) |
| 1612 | { |
| 1613 | int exit_code = 0; |
| 1614 | struct qt_args qt; |
| 1615 | |
| 1616 | undo_terminal_modifications_before_exit (); |
| 1617 | |
| 1618 | /* An optional expression may be used to cause gdb to terminate with the |
| 1619 | value of that expression. */ |
| 1620 | if (exit_arg) |
| 1621 | exit_code = *exit_arg; |
| 1622 | else if (return_child_result) |
| 1623 | exit_code = return_child_result_value; |
| 1624 | |
| 1625 | qt.args = NULL; |
| 1626 | qt.from_tty = from_tty; |
| 1627 | |
| 1628 | /* We want to handle any quit errors and exit regardless. */ |
| 1629 | |
| 1630 | /* Get out of tfind mode, and kill or detach all inferiors. */ |
| 1631 | TRY |
| 1632 | { |
| 1633 | disconnect_tracing (); |
| 1634 | iterate_over_inferiors (kill_or_detach, &qt); |
| 1635 | } |
| 1636 | CATCH (ex, RETURN_MASK_ALL) |
| 1637 | { |
| 1638 | exception_print (gdb_stderr, ex); |
| 1639 | } |
| 1640 | END_CATCH |
| 1641 | |
| 1642 | /* Give all pushed targets a chance to do minimal cleanup, and pop |
| 1643 | them all out. */ |
| 1644 | TRY |
| 1645 | { |
| 1646 | pop_all_targets (); |
| 1647 | } |
| 1648 | CATCH (ex, RETURN_MASK_ALL) |
| 1649 | { |
| 1650 | exception_print (gdb_stderr, ex); |
| 1651 | } |
| 1652 | END_CATCH |
| 1653 | |
| 1654 | /* Save the history information if it is appropriate to do so. */ |
| 1655 | TRY |
| 1656 | { |
| 1657 | if (write_history_p && history_filename) |
| 1658 | { |
| 1659 | struct ui *ui; |
| 1660 | int save = 0; |
| 1661 | |
| 1662 | /* History is currently shared between all UIs. If there's |
| 1663 | any UI with a terminal, save history. */ |
| 1664 | ALL_UIS (ui) |
| 1665 | { |
| 1666 | if (input_interactive_p (ui)) |
| 1667 | { |
| 1668 | save = 1; |
| 1669 | break; |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | if (save) |
| 1674 | gdb_safe_append_history (); |
| 1675 | } |
| 1676 | } |
| 1677 | CATCH (ex, RETURN_MASK_ALL) |
| 1678 | { |
| 1679 | exception_print (gdb_stderr, ex); |
| 1680 | } |
| 1681 | END_CATCH |
| 1682 | |
| 1683 | /* Do any final cleanups before exiting. */ |
| 1684 | TRY |
| 1685 | { |
| 1686 | do_final_cleanups (all_cleanups ()); |
| 1687 | } |
| 1688 | CATCH (ex, RETURN_MASK_ALL) |
| 1689 | { |
| 1690 | exception_print (gdb_stderr, ex); |
| 1691 | } |
| 1692 | END_CATCH |
| 1693 | |
| 1694 | exit (exit_code); |
| 1695 | } |
| 1696 | |
| 1697 | /* The value of the "interactive-mode" setting. */ |
| 1698 | static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO; |
| 1699 | |
| 1700 | /* Implement the "show interactive-mode" option. */ |
| 1701 | |
| 1702 | static void |
| 1703 | show_interactive_mode (struct ui_file *file, int from_tty, |
| 1704 | struct cmd_list_element *c, |
| 1705 | const char *value) |
| 1706 | { |
| 1707 | if (interactive_mode == AUTO_BOOLEAN_AUTO) |
| 1708 | fprintf_filtered (file, "Debugger's interactive mode " |
| 1709 | "is %s (currently %s).\n", |
| 1710 | value, input_interactive_p (current_ui) ? "on" : "off"); |
| 1711 | else |
| 1712 | fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value); |
| 1713 | } |
| 1714 | |
| 1715 | /* Returns whether GDB is running on an interactive terminal. */ |
| 1716 | |
| 1717 | int |
| 1718 | input_interactive_p (struct ui *ui) |
| 1719 | { |
| 1720 | if (batch_flag) |
| 1721 | return 0; |
| 1722 | |
| 1723 | if (interactive_mode != AUTO_BOOLEAN_AUTO) |
| 1724 | return interactive_mode == AUTO_BOOLEAN_TRUE; |
| 1725 | |
| 1726 | return ui->input_interactive_p; |
| 1727 | } |
| 1728 | \f |
| 1729 | static void |
| 1730 | dont_repeat_command (char *ignored, int from_tty) |
| 1731 | { |
| 1732 | /* Can't call dont_repeat here because we're not necessarily reading |
| 1733 | from stdin. */ |
| 1734 | *saved_command_line = 0; |
| 1735 | } |
| 1736 | \f |
| 1737 | /* Functions to manipulate command line editing control variables. */ |
| 1738 | |
| 1739 | /* Number of commands to print in each call to show_commands. */ |
| 1740 | #define Hist_print 10 |
| 1741 | void |
| 1742 | show_commands (char *args, int from_tty) |
| 1743 | { |
| 1744 | /* Index for history commands. Relative to history_base. */ |
| 1745 | int offset; |
| 1746 | |
| 1747 | /* Number of the history entry which we are planning to display next. |
| 1748 | Relative to history_base. */ |
| 1749 | static int num = 0; |
| 1750 | |
| 1751 | /* Print out some of the commands from the command history. */ |
| 1752 | |
| 1753 | if (args) |
| 1754 | { |
| 1755 | if (args[0] == '+' && args[1] == '\0') |
| 1756 | /* "info editing +" should print from the stored position. */ |
| 1757 | ; |
| 1758 | else |
| 1759 | /* "info editing <exp>" should print around command number <exp>. */ |
| 1760 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
| 1761 | } |
| 1762 | /* "show commands" means print the last Hist_print commands. */ |
| 1763 | else |
| 1764 | { |
| 1765 | num = history_length - Hist_print; |
| 1766 | } |
| 1767 | |
| 1768 | if (num < 0) |
| 1769 | num = 0; |
| 1770 | |
| 1771 | /* If there are at least Hist_print commands, we want to display the last |
| 1772 | Hist_print rather than, say, the last 6. */ |
| 1773 | if (history_length - num < Hist_print) |
| 1774 | { |
| 1775 | num = history_length - Hist_print; |
| 1776 | if (num < 0) |
| 1777 | num = 0; |
| 1778 | } |
| 1779 | |
| 1780 | for (offset = num; |
| 1781 | offset < num + Hist_print && offset < history_length; |
| 1782 | offset++) |
| 1783 | { |
| 1784 | printf_filtered ("%5d %s\n", history_base + offset, |
| 1785 | (history_get (history_base + offset))->line); |
| 1786 | } |
| 1787 | |
| 1788 | /* The next command we want to display is the next one that we haven't |
| 1789 | displayed yet. */ |
| 1790 | num += Hist_print; |
| 1791 | |
| 1792 | /* If the user repeats this command with return, it should do what |
| 1793 | "show commands +" does. This is unnecessary if arg is null, |
| 1794 | because "show commands +" is not useful after "show commands". */ |
| 1795 | if (from_tty && args) |
| 1796 | { |
| 1797 | args[0] = '+'; |
| 1798 | args[1] = '\0'; |
| 1799 | } |
| 1800 | } |
| 1801 | |
| 1802 | /* Update the size of our command history file to HISTORY_SIZE. |
| 1803 | |
| 1804 | A HISTORY_SIZE of -1 stands for unlimited. */ |
| 1805 | |
| 1806 | static void |
| 1807 | set_readline_history_size (int history_size) |
| 1808 | { |
| 1809 | gdb_assert (history_size >= -1); |
| 1810 | |
| 1811 | if (history_size == -1) |
| 1812 | unstifle_history (); |
| 1813 | else |
| 1814 | stifle_history (history_size); |
| 1815 | } |
| 1816 | |
| 1817 | /* Called by do_setshow_command. */ |
| 1818 | static void |
| 1819 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1820 | { |
| 1821 | set_readline_history_size (history_size_setshow_var); |
| 1822 | } |
| 1823 | |
| 1824 | void |
| 1825 | set_history (char *args, int from_tty) |
| 1826 | { |
| 1827 | printf_unfiltered (_("\"set history\" must be followed " |
| 1828 | "by the name of a history subcommand.\n")); |
| 1829 | help_list (sethistlist, "set history ", all_commands, gdb_stdout); |
| 1830 | } |
| 1831 | |
| 1832 | void |
| 1833 | show_history (char *args, int from_tty) |
| 1834 | { |
| 1835 | cmd_show_list (showhistlist, from_tty, ""); |
| 1836 | } |
| 1837 | |
| 1838 | int info_verbose = 0; /* Default verbose msgs off. */ |
| 1839 | |
| 1840 | /* Called by do_setshow_command. An elaborate joke. */ |
| 1841 | void |
| 1842 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
| 1843 | { |
| 1844 | const char *cmdname = "verbose"; |
| 1845 | struct cmd_list_element *showcmd; |
| 1846 | |
| 1847 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 1848 | gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS); |
| 1849 | |
| 1850 | if (info_verbose) |
| 1851 | { |
| 1852 | c->doc = "Set verbose printing of informational messages."; |
| 1853 | showcmd->doc = "Show verbose printing of informational messages."; |
| 1854 | } |
| 1855 | else |
| 1856 | { |
| 1857 | c->doc = "Set verbosity."; |
| 1858 | showcmd->doc = "Show verbosity."; |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | /* Init the history buffer. Note that we are called after the init file(s) |
| 1863 | have been read so that the user can change the history file via his |
| 1864 | .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 1865 | overrides all of this. */ |
| 1866 | |
| 1867 | void |
| 1868 | init_history (void) |
| 1869 | { |
| 1870 | char *tmpenv; |
| 1871 | |
| 1872 | tmpenv = getenv ("GDBHISTSIZE"); |
| 1873 | if (tmpenv) |
| 1874 | { |
| 1875 | long var; |
| 1876 | int saved_errno; |
| 1877 | char *endptr; |
| 1878 | |
| 1879 | tmpenv = skip_spaces (tmpenv); |
| 1880 | errno = 0; |
| 1881 | var = strtol (tmpenv, &endptr, 10); |
| 1882 | saved_errno = errno; |
| 1883 | endptr = skip_spaces (endptr); |
| 1884 | |
| 1885 | /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the |
| 1886 | empty string, a negative number or a huge positive number (larger than |
| 1887 | INT_MAX) then set the history size to unlimited. Otherwise set our |
| 1888 | history size to the number we have read. This behavior is consistent |
| 1889 | with how bash handles HISTSIZE. */ |
| 1890 | if (*endptr != '\0') |
| 1891 | ; |
| 1892 | else if (*tmpenv == '\0' |
| 1893 | || var < 0 |
| 1894 | || var > INT_MAX |
| 1895 | /* On targets where INT_MAX == LONG_MAX, we have to look at |
| 1896 | errno after calling strtol to distinguish between a value that |
| 1897 | is exactly INT_MAX and an overflowing value that was clamped |
| 1898 | to INT_MAX. */ |
| 1899 | || (var == INT_MAX && saved_errno == ERANGE)) |
| 1900 | history_size_setshow_var = -1; |
| 1901 | else |
| 1902 | history_size_setshow_var = var; |
| 1903 | } |
| 1904 | |
| 1905 | /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the |
| 1906 | default. */ |
| 1907 | if (history_size_setshow_var == -2) |
| 1908 | history_size_setshow_var = 256; |
| 1909 | |
| 1910 | set_readline_history_size (history_size_setshow_var); |
| 1911 | |
| 1912 | tmpenv = getenv ("GDBHISTFILE"); |
| 1913 | if (tmpenv) |
| 1914 | history_filename = xstrdup (tmpenv); |
| 1915 | else if (!history_filename) |
| 1916 | { |
| 1917 | /* We include the current directory so that if the user changes |
| 1918 | directories the file written will be the same as the one |
| 1919 | that was read. */ |
| 1920 | #ifdef __MSDOS__ |
| 1921 | /* No leading dots in file names are allowed on MSDOS. */ |
| 1922 | history_filename = concat (current_directory, "/_gdb_history", |
| 1923 | (char *)NULL); |
| 1924 | #else |
| 1925 | history_filename = concat (current_directory, "/.gdb_history", |
| 1926 | (char *)NULL); |
| 1927 | #endif |
| 1928 | } |
| 1929 | read_history (history_filename); |
| 1930 | } |
| 1931 | |
| 1932 | static void |
| 1933 | show_prompt (struct ui_file *file, int from_tty, |
| 1934 | struct cmd_list_element *c, const char *value) |
| 1935 | { |
| 1936 | fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value); |
| 1937 | } |
| 1938 | |
| 1939 | /* "set editing" command. */ |
| 1940 | |
| 1941 | static void |
| 1942 | set_editing (char *args, int from_tty, struct cmd_list_element *c) |
| 1943 | { |
| 1944 | change_line_handler (set_editing_cmd_var); |
| 1945 | /* Update the control variable so that MI's =cmd-param-changed event |
| 1946 | shows the correct value. */ |
| 1947 | set_editing_cmd_var = current_ui->command_editing; |
| 1948 | } |
| 1949 | |
| 1950 | static void |
| 1951 | show_editing (struct ui_file *file, int from_tty, |
| 1952 | struct cmd_list_element *c, const char *value) |
| 1953 | { |
| 1954 | fprintf_filtered (file, _("Editing of command lines as " |
| 1955 | "they are typed is %s.\n"), |
| 1956 | current_ui->command_editing ? _("on") : _("off")); |
| 1957 | } |
| 1958 | |
| 1959 | static void |
| 1960 | show_annotation_level (struct ui_file *file, int from_tty, |
| 1961 | struct cmd_list_element *c, const char *value) |
| 1962 | { |
| 1963 | fprintf_filtered (file, _("Annotation_level is %s.\n"), value); |
| 1964 | } |
| 1965 | |
| 1966 | static void |
| 1967 | show_exec_done_display_p (struct ui_file *file, int from_tty, |
| 1968 | struct cmd_list_element *c, const char *value) |
| 1969 | { |
| 1970 | fprintf_filtered (file, _("Notification of completion for " |
| 1971 | "asynchronous execution commands is %s.\n"), |
| 1972 | value); |
| 1973 | } |
| 1974 | |
| 1975 | /* New values of the "data-directory" parameter are staged here. */ |
| 1976 | static char *staged_gdb_datadir; |
| 1977 | |
| 1978 | /* "set" command for the gdb_datadir configuration variable. */ |
| 1979 | |
| 1980 | static void |
| 1981 | set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c) |
| 1982 | { |
| 1983 | set_gdb_data_directory (staged_gdb_datadir); |
| 1984 | observer_notify_gdb_datadir_changed (); |
| 1985 | } |
| 1986 | |
| 1987 | /* "show" command for the gdb_datadir configuration variable. */ |
| 1988 | |
| 1989 | static void |
| 1990 | show_gdb_datadir (struct ui_file *file, int from_tty, |
| 1991 | struct cmd_list_element *c, const char *value) |
| 1992 | { |
| 1993 | fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"), |
| 1994 | gdb_datadir); |
| 1995 | } |
| 1996 | |
| 1997 | static void |
| 1998 | set_history_filename (char *args, int from_tty, struct cmd_list_element *c) |
| 1999 | { |
| 2000 | /* We include the current directory so that if the user changes |
| 2001 | directories the file written will be the same as the one |
| 2002 | that was read. */ |
| 2003 | if (!IS_ABSOLUTE_PATH (history_filename)) |
| 2004 | history_filename = reconcat (history_filename, current_directory, "/", |
| 2005 | history_filename, (char *) NULL); |
| 2006 | } |
| 2007 | |
| 2008 | static void |
| 2009 | init_main (void) |
| 2010 | { |
| 2011 | struct cmd_list_element *c; |
| 2012 | |
| 2013 | /* Initialize the prompt to a simple "(gdb) " prompt or to whatever |
| 2014 | the DEFAULT_PROMPT is. */ |
| 2015 | set_prompt (DEFAULT_PROMPT); |
| 2016 | |
| 2017 | /* Set the important stuff up for command editing. */ |
| 2018 | command_editing_p = 1; |
| 2019 | history_expansion_p = 0; |
| 2020 | write_history_p = 0; |
| 2021 | |
| 2022 | /* Setup important stuff for command line editing. */ |
| 2023 | rl_completion_word_break_hook = gdb_completion_word_break_characters; |
| 2024 | rl_completion_entry_function = readline_line_completion_function; |
| 2025 | rl_completer_word_break_characters = default_word_break_characters (); |
| 2026 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
| 2027 | rl_completion_display_matches_hook = cli_display_match_list; |
| 2028 | rl_readline_name = "gdb"; |
| 2029 | rl_terminal_name = getenv ("TERM"); |
| 2030 | |
| 2031 | /* The name for this defun comes from Bash, where it originated. |
| 2032 | 15 is Control-o, the same binding this function has in Bash. */ |
| 2033 | rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); |
| 2034 | |
| 2035 | add_setshow_string_cmd ("prompt", class_support, |
| 2036 | &top_prompt, |
| 2037 | _("Set gdb's prompt"), |
| 2038 | _("Show gdb's prompt"), |
| 2039 | NULL, NULL, |
| 2040 | show_prompt, |
| 2041 | &setlist, &showlist); |
| 2042 | |
| 2043 | add_com ("dont-repeat", class_support, dont_repeat_command, _("\ |
| 2044 | Don't repeat this command.\nPrimarily \ |
| 2045 | used inside of user-defined commands that should not be repeated when\n\ |
| 2046 | hitting return.")); |
| 2047 | |
| 2048 | add_setshow_boolean_cmd ("editing", class_support, |
| 2049 | &set_editing_cmd_var, _("\ |
| 2050 | Set editing of command lines as they are typed."), _("\ |
| 2051 | Show editing of command lines as they are typed."), _("\ |
| 2052 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
| 2053 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 2054 | EMACS-like or VI-like commands like control-P or ESC."), |
| 2055 | set_editing, |
| 2056 | show_editing, |
| 2057 | &setlist, &showlist); |
| 2058 | |
| 2059 | add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\ |
| 2060 | Set saving of the history record on exit."), _("\ |
| 2061 | Show saving of the history record on exit."), _("\ |
| 2062 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
| 2063 | Without an argument, saving is enabled."), |
| 2064 | NULL, |
| 2065 | show_write_history_p, |
| 2066 | &sethistlist, &showhistlist); |
| 2067 | |
| 2068 | add_setshow_zuinteger_unlimited_cmd ("size", no_class, |
| 2069 | &history_size_setshow_var, _("\ |
| 2070 | Set the size of the command history,"), _("\ |
| 2071 | Show the size of the command history,"), _("\ |
| 2072 | ie. the number of previous commands to keep a record of.\n\ |
| 2073 | If set to \"unlimited\", the number of commands kept in the history\n\ |
| 2074 | list is unlimited. This defaults to the value of the environment\n\ |
| 2075 | variable \"GDBHISTSIZE\", or to 256 if this variable is not set."), |
| 2076 | set_history_size_command, |
| 2077 | show_history_size, |
| 2078 | &sethistlist, &showhistlist); |
| 2079 | |
| 2080 | add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class, |
| 2081 | &history_remove_duplicates, _("\ |
| 2082 | Set how far back in history to look for and remove duplicate entries."), _("\ |
| 2083 | Show how far back in history to look for and remove duplicate entries."), _("\ |
| 2084 | If set to a nonzero value N, GDB will look back at the last N history entries\n\ |
| 2085 | and remove the first history entry that is a duplicate of the most recent\n\ |
| 2086 | entry, each time a new history entry is added.\n\ |
| 2087 | If set to \"unlimited\", this lookbehind is unbounded.\n\ |
| 2088 | Only history entries added during this session are considered for removal.\n\ |
| 2089 | If set to 0, removal of duplicate history entries is disabled.\n\ |
| 2090 | By default this option is set to 0."), |
| 2091 | NULL, |
| 2092 | show_history_remove_duplicates, |
| 2093 | &sethistlist, &showhistlist); |
| 2094 | |
| 2095 | add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\ |
| 2096 | Set the filename in which to record the command history"), _("\ |
| 2097 | Show the filename in which to record the command history"), _("\ |
| 2098 | (the list of previous commands of which a record is kept)."), |
| 2099 | set_history_filename, |
| 2100 | show_history_filename, |
| 2101 | &sethistlist, &showhistlist); |
| 2102 | |
| 2103 | add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\ |
| 2104 | Set whether to confirm potentially dangerous operations."), _("\ |
| 2105 | Show whether to confirm potentially dangerous operations."), NULL, |
| 2106 | NULL, |
| 2107 | show_confirm, |
| 2108 | &setlist, &showlist); |
| 2109 | |
| 2110 | add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\ |
| 2111 | Set annotation_level."), _("\ |
| 2112 | Show annotation_level."), _("\ |
| 2113 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
| 2114 | 2 == output annotated suitably for use by programs that control GDB."), |
| 2115 | NULL, |
| 2116 | show_annotation_level, |
| 2117 | &setlist, &showlist); |
| 2118 | |
| 2119 | add_setshow_boolean_cmd ("exec-done-display", class_support, |
| 2120 | &exec_done_display_p, _("\ |
| 2121 | Set notification of completion for asynchronous execution commands."), _("\ |
| 2122 | Show notification of completion for asynchronous execution commands."), _("\ |
| 2123 | Use \"on\" to enable the notification, and \"off\" to disable it."), |
| 2124 | NULL, |
| 2125 | show_exec_done_display_p, |
| 2126 | &setlist, &showlist); |
| 2127 | |
| 2128 | add_setshow_filename_cmd ("data-directory", class_maintenance, |
| 2129 | &staged_gdb_datadir, _("Set GDB's data directory."), |
| 2130 | _("Show GDB's data directory."), |
| 2131 | _("\ |
| 2132 | When set, GDB uses the specified path to search for data files."), |
| 2133 | set_gdb_datadir, show_gdb_datadir, |
| 2134 | &setlist, |
| 2135 | &showlist); |
| 2136 | |
| 2137 | add_setshow_auto_boolean_cmd ("interactive-mode", class_support, |
| 2138 | &interactive_mode, _("\ |
| 2139 | Set whether GDB's standard input is a terminal."), _("\ |
| 2140 | Show whether GDB's standard input is a terminal."), _("\ |
| 2141 | If on, GDB assumes that standard input is a terminal. In practice, it\n\ |
| 2142 | means that GDB should wait for the user to answer queries associated to\n\ |
| 2143 | commands entered at the command prompt. If off, GDB assumes that standard\n\ |
| 2144 | input is not a terminal, and uses the default answer to all queries.\n\ |
| 2145 | If auto (the default), determine which mode to use based on the standard\n\ |
| 2146 | input settings."), |
| 2147 | NULL, |
| 2148 | show_interactive_mode, |
| 2149 | &setlist, &showlist); |
| 2150 | |
| 2151 | c = add_cmd ("new-ui", class_support, new_ui_command, _("\ |
| 2152 | Create a new UI. It takes two arguments:\n\ |
| 2153 | The first argument is the name of the interpreter to run.\n\ |
| 2154 | The second argument is the terminal the UI runs on.\n"), &cmdlist); |
| 2155 | set_cmd_completer (c, interpreter_completer); |
| 2156 | } |
| 2157 | |
| 2158 | void |
| 2159 | gdb_init (char *argv0) |
| 2160 | { |
| 2161 | if (pre_init_ui_hook) |
| 2162 | pre_init_ui_hook (); |
| 2163 | |
| 2164 | /* Run the init function of each source file. */ |
| 2165 | |
| 2166 | #ifdef __MSDOS__ |
| 2167 | /* Make sure we return to the original directory upon exit, come |
| 2168 | what may, since the OS doesn't do that for us. */ |
| 2169 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
| 2170 | #endif |
| 2171 | |
| 2172 | init_cmd_lists (); /* This needs to be done first. */ |
| 2173 | initialize_targets (); /* Setup target_terminal macros for utils.c. */ |
| 2174 | initialize_utils (); /* Make errors and warnings possible. */ |
| 2175 | |
| 2176 | init_page_info (); |
| 2177 | |
| 2178 | /* Here is where we call all the _initialize_foo routines. */ |
| 2179 | initialize_all_files (); |
| 2180 | |
| 2181 | /* This creates the current_program_space. Do this after all the |
| 2182 | _initialize_foo routines have had a chance to install their |
| 2183 | per-sspace data keys. Also do this before |
| 2184 | initialize_current_architecture is called, because it accesses |
| 2185 | exec_bfd of the current program space. */ |
| 2186 | initialize_progspace (); |
| 2187 | initialize_inferiors (); |
| 2188 | initialize_current_architecture (); |
| 2189 | init_cli_cmds(); |
| 2190 | init_main (); /* But that omits this file! Do it now. */ |
| 2191 | |
| 2192 | initialize_stdin_serial (); |
| 2193 | |
| 2194 | /* Take a snapshot of our tty state before readline/ncurses have had a chance |
| 2195 | to alter it. */ |
| 2196 | set_initial_gdb_ttystate (); |
| 2197 | |
| 2198 | async_init_signals (); |
| 2199 | |
| 2200 | /* We need a default language for parsing expressions, so simple |
| 2201 | things like "set width 0" won't fail if no language is explicitly |
| 2202 | set in a config file or implicitly set by reading an executable |
| 2203 | during startup. */ |
| 2204 | set_language (language_c); |
| 2205 | expected_language = current_language; /* Don't warn about the change. */ |
| 2206 | |
| 2207 | /* Python initialization, for example, can require various commands to be |
| 2208 | installed. For example "info pretty-printer" needs the "info" |
| 2209 | prefix to be installed. Keep things simple and just do final |
| 2210 | script initialization here. */ |
| 2211 | finish_ext_lang_initialization (); |
| 2212 | } |