| 1 | /* Top level stuff for GDB, the GNU debugger. |
| 2 | Copyright 1986-2000 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "gdbcmd.h" |
| 23 | #include "call-cmds.h" |
| 24 | #include "symtab.h" |
| 25 | #include "inferior.h" |
| 26 | #include "signals.h" |
| 27 | #include "target.h" |
| 28 | #include "breakpoint.h" |
| 29 | #include "gdbtypes.h" |
| 30 | #include "expression.h" |
| 31 | #include "value.h" |
| 32 | #include "language.h" |
| 33 | #include "terminal.h" /* For job_control. */ |
| 34 | #include "annotate.h" |
| 35 | #include "completer.h" |
| 36 | #include "top.h" |
| 37 | #include "version.h" |
| 38 | |
| 39 | /* readline include files */ |
| 40 | #include <readline/readline.h> |
| 41 | #include <readline/history.h> |
| 42 | |
| 43 | /* readline defines this. */ |
| 44 | #undef savestring |
| 45 | |
| 46 | #include <sys/types.h> |
| 47 | |
| 48 | #include <setjmp.h> |
| 49 | |
| 50 | #include "event-top.h" |
| 51 | #include "gdb_string.h" |
| 52 | #include "gdb_stat.h" |
| 53 | #include <ctype.h> |
| 54 | #ifdef UI_OUT |
| 55 | #include "ui-out.h" |
| 56 | #include "cli-out.h" |
| 57 | #endif |
| 58 | |
| 59 | /* From completer.c */ |
| 60 | |
| 61 | extern int is_complete_command (void (*func) (char *args, int from_tty)); |
| 62 | |
| 63 | /* From cli/cli-cmds.c */ |
| 64 | |
| 65 | extern void init_cmd_lists (void); |
| 66 | |
| 67 | extern void init_cli_cmds (void); |
| 68 | |
| 69 | extern void execute_user_command (struct cmd_list_element *c, char *args); |
| 70 | |
| 71 | /* From cli/cli-setshow.c */ |
| 72 | |
| 73 | extern void do_setshow_command (char *, int, struct cmd_list_element *); |
| 74 | |
| 75 | /* Exported to CLI cli/cli-cmds.c. */ |
| 76 | |
| 77 | void set_verbose (char *, int, struct cmd_list_element *); |
| 78 | |
| 79 | void show_history (char *, int); |
| 80 | |
| 81 | void set_history (char *, int); |
| 82 | |
| 83 | void show_commands (char *, int); |
| 84 | |
| 85 | void do_restore_instream_cleanup (void *stream); |
| 86 | |
| 87 | /* Prototypes for local functions */ |
| 88 | |
| 89 | static void dont_repeat_command (char *, int); |
| 90 | |
| 91 | static void init_signals (void); |
| 92 | |
| 93 | #ifdef STOP_SIGNAL |
| 94 | static void stop_sig (int); |
| 95 | #endif |
| 96 | |
| 97 | static char *readline_line_completion_function (char *, int); |
| 98 | |
| 99 | static void init_main (void); |
| 100 | |
| 101 | static void float_handler (int); |
| 102 | |
| 103 | static void init_signals (void); |
| 104 | |
| 105 | static void set_history_size_command (char *, int, struct cmd_list_element *); |
| 106 | |
| 107 | static void do_nothing (int); |
| 108 | |
| 109 | #ifdef SIGHUP |
| 110 | /* NOTE 1999-04-29: This function will be static again, once we modify |
| 111 | gdb to use the event loop as the default command loop and we merge |
| 112 | event-top.c into this file, top.c */ |
| 113 | /* static */ int quit_cover (PTR); |
| 114 | |
| 115 | static void disconnect (int); |
| 116 | #endif |
| 117 | |
| 118 | /* Default command line prompt. This is overriden in some configs. */ |
| 119 | |
| 120 | #ifndef DEFAULT_PROMPT |
| 121 | #define DEFAULT_PROMPT "(gdb) " |
| 122 | #endif |
| 123 | |
| 124 | /* Initialization file name for gdb. This is overridden in some configs. */ |
| 125 | |
| 126 | #ifndef GDBINIT_FILENAME |
| 127 | #define GDBINIT_FILENAME ".gdbinit" |
| 128 | #endif |
| 129 | char gdbinit[] = GDBINIT_FILENAME; |
| 130 | |
| 131 | int inhibit_gdbinit = 0; |
| 132 | |
| 133 | /* If nonzero, and GDB has been configured to be able to use windows, |
| 134 | attempt to open them upon startup. */ |
| 135 | |
| 136 | int use_windows = 1; |
| 137 | |
| 138 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 139 | |
| 140 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
| 141 | |
| 142 | int caution = 1; /* Default is yes, sigh. */ |
| 143 | |
| 144 | /* stdio stream that command input is being read from. Set to stdin normally. |
| 145 | Set by source_command to the file we are sourcing. Set to NULL if we are |
| 146 | executing a user-defined command or interacting via a GUI. */ |
| 147 | |
| 148 | FILE *instream; |
| 149 | |
| 150 | /* Current working directory. */ |
| 151 | |
| 152 | char *current_directory; |
| 153 | |
| 154 | /* The directory name is actually stored here (usually). */ |
| 155 | char gdb_dirbuf[1024]; |
| 156 | |
| 157 | /* Function to call before reading a command, if nonzero. |
| 158 | The function receives two args: an input stream, |
| 159 | and a prompt string. */ |
| 160 | |
| 161 | void (*window_hook) (FILE *, char *); |
| 162 | |
| 163 | int epoch_interface; |
| 164 | int xgdb_verbose; |
| 165 | |
| 166 | /* gdb prints this when reading a command interactively */ |
| 167 | static char *gdb_prompt_string; /* the global prompt string */ |
| 168 | extern char *get_prompt (void); /* access function for prompt string */ |
| 169 | |
| 170 | /* Buffer used for reading command lines, and the size |
| 171 | allocated for it so far. */ |
| 172 | |
| 173 | char *line; |
| 174 | int linesize = 100; |
| 175 | |
| 176 | /* Nonzero if the current command is modified by "server ". This |
| 177 | affects things like recording into the command history, commands |
| 178 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
| 179 | whatever) can issue its own commands and also send along commands |
| 180 | from the user, and have the user not notice that the user interface |
| 181 | is issuing commands too. */ |
| 182 | int server_command; |
| 183 | |
| 184 | /* Baud rate specified for talking to serial target systems. Default |
| 185 | is left as -1, so targets can choose their own defaults. */ |
| 186 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 |
| 187 | or (unsigned int)-1. This is a Bad User Interface. */ |
| 188 | |
| 189 | int baud_rate = -1; |
| 190 | |
| 191 | /* Timeout limit for response from target. */ |
| 192 | |
| 193 | /* The default value has been changed many times over the years. It |
| 194 | was originally 5 seconds. But that was thought to be a long time |
| 195 | to sit and wait, so it was changed to 2 seconds. That was thought |
| 196 | to be plenty unless the connection was going through some terminal |
| 197 | server or multiplexer or other form of hairy serial connection. |
| 198 | |
| 199 | In mid-1996, remote_timeout was moved from remote.c to top.c and |
| 200 | it began being used in other remote-* targets. It appears that the |
| 201 | default was changed to 20 seconds at that time, perhaps because the |
| 202 | Hitachi E7000 ICE didn't always respond in a timely manner. |
| 203 | |
| 204 | But if 5 seconds is a long time to sit and wait for retransmissions, |
| 205 | 20 seconds is far worse. This demonstrates the difficulty of using |
| 206 | a single variable for all protocol timeouts. |
| 207 | |
| 208 | As remote.c is used much more than remote-e7000.c, it was changed |
| 209 | back to 2 seconds in 1999. */ |
| 210 | |
| 211 | int remote_timeout = 2; |
| 212 | |
| 213 | /* Non-zero tells remote* modules to output debugging info. */ |
| 214 | |
| 215 | int remote_debug = 0; |
| 216 | |
| 217 | /* Non-zero means the target is running. Note: this is different from |
| 218 | saying that there is an active target and we are stopped at a |
| 219 | breakpoint, for instance. This is a real indicator whether the |
| 220 | target is off and running, which gdb is doing something else. */ |
| 221 | int target_executing = 0; |
| 222 | |
| 223 | /* Level of control structure. */ |
| 224 | static int control_level; |
| 225 | |
| 226 | /* Structure for arguments to user defined functions. */ |
| 227 | #define MAXUSERARGS 10 |
| 228 | struct user_args |
| 229 | { |
| 230 | struct user_args *next; |
| 231 | struct |
| 232 | { |
| 233 | char *arg; |
| 234 | int len; |
| 235 | } |
| 236 | a[MAXUSERARGS]; |
| 237 | int count; |
| 238 | } |
| 239 | *user_args; |
| 240 | |
| 241 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
| 242 | |
| 243 | #ifndef STOP_SIGNAL |
| 244 | #ifdef SIGTSTP |
| 245 | #define STOP_SIGNAL SIGTSTP |
| 246 | static void stop_sig (int); |
| 247 | #endif |
| 248 | #endif |
| 249 | |
| 250 | /* Some System V have job control but not sigsetmask(). */ |
| 251 | #if !defined (HAVE_SIGSETMASK) |
| 252 | #if !defined (USG) |
| 253 | #define HAVE_SIGSETMASK 1 |
| 254 | #else |
| 255 | #define HAVE_SIGSETMASK 0 |
| 256 | #endif |
| 257 | #endif |
| 258 | |
| 259 | #if 0 == (HAVE_SIGSETMASK) |
| 260 | #define sigsetmask(n) |
| 261 | #endif |
| 262 | |
| 263 | /* Hooks for alternate command interfaces. */ |
| 264 | |
| 265 | /* Called after most modules have been initialized, but before taking users |
| 266 | command file. */ |
| 267 | |
| 268 | void (*init_ui_hook) (char *argv0); |
| 269 | |
| 270 | /* This hook is called from within gdb's many mini-event loops which could |
| 271 | steal control from a real user interface's event loop. It returns |
| 272 | non-zero if the user is requesting a detach, zero otherwise. */ |
| 273 | |
| 274 | int (*ui_loop_hook) (int); |
| 275 | |
| 276 | /* Called instead of command_loop at top level. Can be invoked via |
| 277 | return_to_top_level. */ |
| 278 | |
| 279 | void (*command_loop_hook) (void); |
| 280 | |
| 281 | |
| 282 | /* Called from print_frame_info to list the line we stopped in. */ |
| 283 | |
| 284 | void (*print_frame_info_listing_hook) (struct symtab * s, int line, |
| 285 | int stopline, int noerror); |
| 286 | /* Replaces most of query. */ |
| 287 | |
| 288 | int (*query_hook) (const char *, va_list); |
| 289 | |
| 290 | /* Replaces most of warning. */ |
| 291 | |
| 292 | void (*warning_hook) (const char *, va_list); |
| 293 | |
| 294 | /* These three functions support getting lines of text from the user. They |
| 295 | are used in sequence. First readline_begin_hook is called with a text |
| 296 | string that might be (for example) a message for the user to type in a |
| 297 | sequence of commands to be executed at a breakpoint. If this function |
| 298 | calls back to a GUI, it might take this opportunity to pop up a text |
| 299 | interaction window with this message. Next, readline_hook is called |
| 300 | with a prompt that is emitted prior to collecting the user input. |
| 301 | It can be called multiple times. Finally, readline_end_hook is called |
| 302 | to notify the GUI that we are done with the interaction window and it |
| 303 | can close it. */ |
| 304 | |
| 305 | void (*readline_begin_hook) (char *, ...); |
| 306 | char *(*readline_hook) (char *); |
| 307 | void (*readline_end_hook) (void); |
| 308 | |
| 309 | /* Called as appropriate to notify the interface of the specified breakpoint |
| 310 | conditions. */ |
| 311 | |
| 312 | void (*create_breakpoint_hook) (struct breakpoint * bpt); |
| 313 | void (*delete_breakpoint_hook) (struct breakpoint * bpt); |
| 314 | void (*modify_breakpoint_hook) (struct breakpoint * bpt); |
| 315 | |
| 316 | /* Called as appropriate to notify the interface that we have attached |
| 317 | to or detached from an already running process. */ |
| 318 | |
| 319 | void (*attach_hook) (void); |
| 320 | void (*detach_hook) (void); |
| 321 | |
| 322 | /* Called during long calculations to allow GUI to repair window damage, and to |
| 323 | check for stop buttons, etc... */ |
| 324 | |
| 325 | void (*interactive_hook) (void); |
| 326 | |
| 327 | /* Called when the registers have changed, as a hint to a GUI |
| 328 | to minimize window update. */ |
| 329 | |
| 330 | void (*registers_changed_hook) (void); |
| 331 | |
| 332 | /* Tell the GUI someone changed the register REGNO. -1 means |
| 333 | that the caller does not know which register changed or |
| 334 | that several registers have changed (see value_assign). */ |
| 335 | void (*register_changed_hook) (int regno); |
| 336 | |
| 337 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ |
| 338 | void (*memory_changed_hook) (CORE_ADDR addr, int len); |
| 339 | |
| 340 | /* Called when going to wait for the target. Usually allows the GUI to run |
| 341 | while waiting for target events. */ |
| 342 | |
| 343 | int (*target_wait_hook) (int pid, struct target_waitstatus * status); |
| 344 | |
| 345 | /* Used by UI as a wrapper around command execution. May do various things |
| 346 | like enabling/disabling buttons, etc... */ |
| 347 | |
| 348 | void (*call_command_hook) (struct cmd_list_element * c, char *cmd, |
| 349 | int from_tty); |
| 350 | |
| 351 | /* Called after a `set' command has finished. Is only run if the |
| 352 | `set' command succeeded. */ |
| 353 | |
| 354 | void (*set_hook) (struct cmd_list_element * c); |
| 355 | |
| 356 | /* Called when the current thread changes. Argument is thread id. */ |
| 357 | |
| 358 | void (*context_hook) (int id); |
| 359 | |
| 360 | /* Takes control from error (). Typically used to prevent longjmps out of the |
| 361 | middle of the GUI. Usually used in conjunction with a catch routine. */ |
| 362 | |
| 363 | NORETURN void (*error_hook) (void) ATTR_NORETURN; |
| 364 | \f |
| 365 | |
| 366 | /* One should use catch_errors rather than manipulating these |
| 367 | directly. */ |
| 368 | #if defined(HAVE_SIGSETJMP) |
| 369 | #define SIGJMP_BUF sigjmp_buf |
| 370 | #define SIGSETJMP(buf) sigsetjmp(buf, 1) |
| 371 | #define SIGLONGJMP(buf,val) siglongjmp(buf,val) |
| 372 | #else |
| 373 | #define SIGJMP_BUF jmp_buf |
| 374 | #define SIGSETJMP(buf) setjmp(buf) |
| 375 | #define SIGLONGJMP(buf,val) longjmp(buf,val) |
| 376 | #endif |
| 377 | |
| 378 | /* Where to go for return_to_top_level. */ |
| 379 | static SIGJMP_BUF *catch_return; |
| 380 | |
| 381 | /* Return for reason REASON to the nearest containing catch_errors(). */ |
| 382 | |
| 383 | NORETURN void |
| 384 | return_to_top_level (enum return_reason reason) |
| 385 | { |
| 386 | quit_flag = 0; |
| 387 | immediate_quit = 0; |
| 388 | |
| 389 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure |
| 390 | I can think of a reason why that is vital, though). */ |
| 391 | bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */ |
| 392 | |
| 393 | disable_current_display (); |
| 394 | do_cleanups (ALL_CLEANUPS); |
| 395 | if (event_loop_p && target_can_async_p () && !target_executing) |
| 396 | do_exec_cleanups (ALL_CLEANUPS); |
| 397 | if (event_loop_p && sync_execution) |
| 398 | do_exec_error_cleanups (ALL_CLEANUPS); |
| 399 | |
| 400 | if (annotation_level > 1) |
| 401 | switch (reason) |
| 402 | { |
| 403 | case RETURN_QUIT: |
| 404 | annotate_quit (); |
| 405 | break; |
| 406 | case RETURN_ERROR: |
| 407 | annotate_error (); |
| 408 | break; |
| 409 | } |
| 410 | |
| 411 | /* Jump to the containing catch_errors() call, communicating REASON |
| 412 | to that call via setjmp's return value. Note that REASON can't |
| 413 | be zero, by definition in defs.h. */ |
| 414 | |
| 415 | (NORETURN void) SIGLONGJMP (*catch_return, (int) reason); |
| 416 | } |
| 417 | |
| 418 | /* Call FUNC with arg ARGS, catching any errors. If there is no |
| 419 | error, return the value returned by FUNC. If there is an error, |
| 420 | print ERRSTRING, print the specific error message, then return |
| 421 | zero. |
| 422 | |
| 423 | Must not be called with immediate_quit in effect (bad things might |
| 424 | happen, say we got a signal in the middle of a memcpy to quit_return). |
| 425 | This is an OK restriction; with very few exceptions immediate_quit can |
| 426 | be replaced by judicious use of QUIT. |
| 427 | |
| 428 | MASK specifies what to catch; it is normally set to |
| 429 | RETURN_MASK_ALL, if for no other reason than that the code which |
| 430 | calls catch_errors might not be set up to deal with a quit which |
| 431 | isn't caught. But if the code can deal with it, it generally |
| 432 | should be RETURN_MASK_ERROR, unless for some reason it is more |
| 433 | useful to abort only the portion of the operation inside the |
| 434 | catch_errors. Note that quit should return to the command line |
| 435 | fairly quickly, even if some further processing is being done. */ |
| 436 | |
| 437 | /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with |
| 438 | error() et.al. could maintain a set of flags that indicate the the |
| 439 | current state of each of the longjmp buffers. This would give the |
| 440 | longjmp code the chance to detect a longjmp botch (before it gets |
| 441 | to longjmperror()). Prior to 1999-11-05 this wasn't possible as |
| 442 | code also randomly used a SET_TOP_LEVEL macro that directly |
| 443 | initialize the longjmp buffers. */ |
| 444 | |
| 445 | /* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code |
| 446 | be consolidated into a single file instead of being distributed |
| 447 | between utils.c and top.c? */ |
| 448 | |
| 449 | int |
| 450 | catch_errors (catch_errors_ftype *func, PTR args, char *errstring, |
| 451 | return_mask mask) |
| 452 | { |
| 453 | SIGJMP_BUF *saved_catch; |
| 454 | SIGJMP_BUF catch; |
| 455 | int val; |
| 456 | struct cleanup *saved_cleanup_chain; |
| 457 | char *saved_error_pre_print; |
| 458 | char *saved_quit_pre_print; |
| 459 | |
| 460 | /* Return value from SIGSETJMP(): enum return_reason if error or |
| 461 | quit caught, 0 otherwise. */ |
| 462 | int caught; |
| 463 | |
| 464 | /* Override error/quit messages during FUNC. */ |
| 465 | |
| 466 | saved_error_pre_print = error_pre_print; |
| 467 | saved_quit_pre_print = quit_pre_print; |
| 468 | |
| 469 | if (mask & RETURN_MASK_ERROR) |
| 470 | error_pre_print = errstring; |
| 471 | if (mask & RETURN_MASK_QUIT) |
| 472 | quit_pre_print = errstring; |
| 473 | |
| 474 | /* Prevent error/quit during FUNC from calling cleanups established |
| 475 | prior to here. */ |
| 476 | |
| 477 | saved_cleanup_chain = save_cleanups (); |
| 478 | |
| 479 | /* Call FUNC, catching error/quit events. */ |
| 480 | |
| 481 | saved_catch = catch_return; |
| 482 | catch_return = &catch; |
| 483 | caught = SIGSETJMP (catch); |
| 484 | if (!caught) |
| 485 | val = (*func) (args); |
| 486 | else |
| 487 | val = 0; |
| 488 | catch_return = saved_catch; |
| 489 | |
| 490 | /* FIXME: cagney/1999-11-05: A correct FUNC implementation will |
| 491 | clean things up (restoring the cleanup chain) to the state they |
| 492 | were just prior to the call. Unfortunately, many FUNC's are not |
| 493 | that well behaved. This could be fixed by adding either a |
| 494 | do_cleanups call (to cover the problem) or an assertion check to |
| 495 | detect bad FUNCs code. */ |
| 496 | |
| 497 | /* Restore the cleanup chain and error/quit messages to their |
| 498 | original states. */ |
| 499 | |
| 500 | restore_cleanups (saved_cleanup_chain); |
| 501 | |
| 502 | if (mask & RETURN_MASK_QUIT) |
| 503 | quit_pre_print = saved_quit_pre_print; |
| 504 | if (mask & RETURN_MASK_ERROR) |
| 505 | error_pre_print = saved_error_pre_print; |
| 506 | |
| 507 | /* Return normally if no error/quit event occurred. */ |
| 508 | |
| 509 | if (!caught) |
| 510 | return val; |
| 511 | |
| 512 | /* If the caller didn't request that the event be caught, relay the |
| 513 | event to the next containing catch_errors(). */ |
| 514 | |
| 515 | if (!(mask & RETURN_MASK (caught))) |
| 516 | return_to_top_level (caught); |
| 517 | |
| 518 | /* Tell the caller that an event was caught. |
| 519 | |
| 520 | FIXME: nsd/2000-02-22: When MASK is RETURN_MASK_ALL, the caller |
| 521 | can't tell what type of event occurred. |
| 522 | |
| 523 | A possible fix is to add a new interface, catch_event(), that |
| 524 | returns enum return_reason after catching an error or a quit. |
| 525 | |
| 526 | When returning normally, i.e. without catching an error or a |
| 527 | quit, catch_event() could return RETURN_NORMAL, which would be |
| 528 | added to enum return_reason. FUNC would return information |
| 529 | exclusively via ARGS. |
| 530 | |
| 531 | Alternatively, normal catch_event() could return FUNC's return |
| 532 | value. The caller would need to be aware of potential overlap |
| 533 | with enum return_reason, which could be publicly restricted to |
| 534 | negative values to simplify return value processing in FUNC and |
| 535 | in the caller. */ |
| 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | struct captured_command_args |
| 541 | { |
| 542 | catch_command_errors_ftype *command; |
| 543 | char *arg; |
| 544 | int from_tty; |
| 545 | }; |
| 546 | |
| 547 | static int |
| 548 | do_captured_command (void *data) |
| 549 | { |
| 550 | struct captured_command_args *context = data; |
| 551 | context->command (context->arg, context->from_tty); |
| 552 | /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call |
| 553 | isn't needed. Instead an assertion check could be made that |
| 554 | simply confirmed that the called function correctly cleaned up |
| 555 | after itself. Unfortunately, old code (prior to 1999-11-04) in |
| 556 | main.c was calling SET_TOP_LEVEL(), calling the command function, |
| 557 | and then *always* calling do_cleanups(). For the moment we |
| 558 | remain ``bug compatible'' with that old code.. */ |
| 559 | do_cleanups (ALL_CLEANUPS); |
| 560 | return 1; |
| 561 | } |
| 562 | |
| 563 | int |
| 564 | catch_command_errors (catch_command_errors_ftype * command, |
| 565 | char *arg, int from_tty, return_mask mask) |
| 566 | { |
| 567 | struct captured_command_args args; |
| 568 | args.command = command; |
| 569 | args.arg = arg; |
| 570 | args.from_tty = from_tty; |
| 571 | return catch_errors (do_captured_command, &args, "", mask); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | /* Handler for SIGHUP. */ |
| 576 | |
| 577 | #ifdef SIGHUP |
| 578 | static void |
| 579 | disconnect (int signo) |
| 580 | { |
| 581 | catch_errors (quit_cover, NULL, |
| 582 | "Could not kill the program being debugged", RETURN_MASK_ALL); |
| 583 | signal (SIGHUP, SIG_DFL); |
| 584 | kill (getpid (), SIGHUP); |
| 585 | } |
| 586 | |
| 587 | /* Just a little helper function for disconnect(). */ |
| 588 | |
| 589 | /* NOTE 1999-04-29: This function will be static again, once we modify |
| 590 | gdb to use the event loop as the default command loop and we merge |
| 591 | event-top.c into this file, top.c */ |
| 592 | /* static */ int |
| 593 | quit_cover (PTR s) |
| 594 | { |
| 595 | caution = 0; /* Throw caution to the wind -- we're exiting. |
| 596 | This prevents asking the user dumb questions. */ |
| 597 | quit_command ((char *) 0, 0); |
| 598 | return 0; |
| 599 | } |
| 600 | #endif /* defined SIGHUP */ |
| 601 | \f |
| 602 | /* Line number we are currently in in a file which is being sourced. */ |
| 603 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 604 | gdb to use the event loop as the default command loop and we merge |
| 605 | event-top.c into this file, top.c */ |
| 606 | /* static */ int source_line_number; |
| 607 | |
| 608 | /* Name of the file we are sourcing. */ |
| 609 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 610 | gdb to use the event loop as the default command loop and we merge |
| 611 | event-top.c into this file, top.c */ |
| 612 | /* static */ char *source_file_name; |
| 613 | |
| 614 | /* Buffer containing the error_pre_print used by the source stuff. |
| 615 | Malloc'd. */ |
| 616 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 617 | gdb to use the event loop as the default command loop and we merge |
| 618 | event-top.c into this file, top.c */ |
| 619 | /* static */ char *source_error; |
| 620 | static int source_error_allocated; |
| 621 | |
| 622 | /* Something to glom on to the start of error_pre_print if source_file_name |
| 623 | is set. */ |
| 624 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 625 | gdb to use the event loop as the default command loop and we merge |
| 626 | event-top.c into this file, top.c */ |
| 627 | /* static */ char *source_pre_error; |
| 628 | |
| 629 | /* Clean up on error during a "source" command (or execution of a |
| 630 | user-defined command). */ |
| 631 | |
| 632 | void |
| 633 | do_restore_instream_cleanup (void *stream) |
| 634 | { |
| 635 | /* Restore the previous input stream. */ |
| 636 | instream = stream; |
| 637 | } |
| 638 | |
| 639 | /* Read commands from STREAM. */ |
| 640 | void |
| 641 | read_command_file (FILE *stream) |
| 642 | { |
| 643 | struct cleanup *cleanups; |
| 644 | |
| 645 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
| 646 | instream = stream; |
| 647 | command_loop (); |
| 648 | do_cleanups (cleanups); |
| 649 | } |
| 650 | \f |
| 651 | extern void init_proc (void); |
| 652 | |
| 653 | void (*pre_init_ui_hook) (void); |
| 654 | |
| 655 | #ifdef __MSDOS__ |
| 656 | void |
| 657 | do_chdir_cleanup (void *old_dir) |
| 658 | { |
| 659 | chdir (old_dir); |
| 660 | xfree (old_dir); |
| 661 | } |
| 662 | #endif |
| 663 | |
| 664 | void |
| 665 | gdb_init (char *argv0) |
| 666 | { |
| 667 | if (pre_init_ui_hook) |
| 668 | pre_init_ui_hook (); |
| 669 | |
| 670 | /* Run the init function of each source file */ |
| 671 | |
| 672 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
| 673 | current_directory = gdb_dirbuf; |
| 674 | |
| 675 | #ifdef __MSDOS__ |
| 676 | /* Make sure we return to the original directory upon exit, come |
| 677 | what may, since the OS doesn't do that for us. */ |
| 678 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
| 679 | #endif |
| 680 | |
| 681 | init_cmd_lists (); /* This needs to be done first */ |
| 682 | initialize_targets (); /* Setup target_terminal macros for utils.c */ |
| 683 | initialize_utils (); /* Make errors and warnings possible */ |
| 684 | initialize_all_files (); |
| 685 | initialize_current_architecture (); |
| 686 | init_cli_cmds(); |
| 687 | init_main (); /* But that omits this file! Do it now */ |
| 688 | |
| 689 | /* The signal handling mechanism is different depending whether or |
| 690 | not the async version is run. NOTE: in the future we plan to make |
| 691 | the event loop be the default engine of gdb, and this difference |
| 692 | will disappear. */ |
| 693 | if (event_loop_p) |
| 694 | async_init_signals (); |
| 695 | else |
| 696 | init_signals (); |
| 697 | |
| 698 | /* We need a default language for parsing expressions, so simple things like |
| 699 | "set width 0" won't fail if no language is explicitly set in a config file |
| 700 | or implicitly set by reading an executable during startup. */ |
| 701 | set_language (language_c); |
| 702 | expected_language = current_language; /* don't warn about the change. */ |
| 703 | |
| 704 | #ifdef UI_OUT |
| 705 | /* Install the default UI */ |
| 706 | uiout = cli_out_new (gdb_stdout); |
| 707 | #endif |
| 708 | |
| 709 | #ifdef UI_OUT |
| 710 | /* All the interpreters should have had a look at things by now. |
| 711 | Initialize the selected interpreter. */ |
| 712 | if (interpreter_p && !init_ui_hook) |
| 713 | { |
| 714 | fprintf_unfiltered (gdb_stderr, "Interpreter `%s' unrecognized.\n", |
| 715 | interpreter_p); |
| 716 | exit (1); |
| 717 | } |
| 718 | #endif |
| 719 | |
| 720 | if (init_ui_hook) |
| 721 | init_ui_hook (argv0); |
| 722 | } |
| 723 | |
| 724 | /* Execute the line P as a command. |
| 725 | Pass FROM_TTY as second argument to the defining function. */ |
| 726 | |
| 727 | void |
| 728 | execute_command (char *p, int from_tty) |
| 729 | { |
| 730 | register struct cmd_list_element *c; |
| 731 | register enum language flang; |
| 732 | static int warned = 0; |
| 733 | char *line; |
| 734 | /* FIXME: These should really be in an appropriate header file */ |
| 735 | extern void serial_log_command (const char *); |
| 736 | |
| 737 | free_all_values (); |
| 738 | |
| 739 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 740 | a builtin alloca. */ |
| 741 | alloca (0); |
| 742 | |
| 743 | /* This can happen when command_line_input hits end of file. */ |
| 744 | if (p == NULL) |
| 745 | return; |
| 746 | |
| 747 | serial_log_command (p); |
| 748 | |
| 749 | while (*p == ' ' || *p == '\t') |
| 750 | p++; |
| 751 | if (*p) |
| 752 | { |
| 753 | char *arg; |
| 754 | line = p; |
| 755 | |
| 756 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
| 757 | |
| 758 | /* If the target is running, we allow only a limited set of |
| 759 | commands. */ |
| 760 | if (event_loop_p && target_can_async_p () && target_executing) |
| 761 | if (!strcmp (c->name, "help") |
| 762 | && !strcmp (c->name, "pwd") |
| 763 | && !strcmp (c->name, "show") |
| 764 | && !strcmp (c->name, "stop")) |
| 765 | error ("Cannot execute this command while the target is running."); |
| 766 | |
| 767 | /* Pass null arg rather than an empty one. */ |
| 768 | arg = *p ? p : 0; |
| 769 | |
| 770 | /* Clear off trailing whitespace, except for set and complete command. */ |
| 771 | if (arg |
| 772 | && c->type != set_cmd |
| 773 | && !is_complete_command (c->function.cfunc)) |
| 774 | { |
| 775 | p = arg + strlen (arg) - 1; |
| 776 | while (p >= arg && (*p == ' ' || *p == '\t')) |
| 777 | p--; |
| 778 | *(p + 1) = '\0'; |
| 779 | } |
| 780 | |
| 781 | /* If this command has been pre-hooked, run the hook first. */ |
| 782 | if ((c->hook_pre) && (!c->hook_in)) |
| 783 | { |
| 784 | c->hook_in = 1; /* Prevent recursive hooking */ |
| 785 | execute_user_command (c->hook_pre, (char *) 0); |
| 786 | c->hook_in = 0; /* Allow hook to work again once it is complete */ |
| 787 | } |
| 788 | |
| 789 | if (c->flags & DEPRECATED_WARN_USER) |
| 790 | deprecated_cmd_warning (&line); |
| 791 | |
| 792 | if (c->class == class_user) |
| 793 | execute_user_command (c, arg); |
| 794 | else if (c->type == set_cmd || c->type == show_cmd) |
| 795 | do_setshow_command (arg, from_tty & caution, c); |
| 796 | else if (c->function.cfunc == NO_FUNCTION) |
| 797 | error ("That is not a command, just a help topic."); |
| 798 | else if (call_command_hook) |
| 799 | call_command_hook (c, arg, from_tty & caution); |
| 800 | else |
| 801 | (*c->function.cfunc) (arg, from_tty & caution); |
| 802 | |
| 803 | /* If this command has been post-hooked, run the hook last. */ |
| 804 | if ((c->hook_post) && (!c->hook_in)) |
| 805 | { |
| 806 | c->hook_in = 1; /* Prevent recursive hooking */ |
| 807 | execute_user_command (c->hook_post, (char *) 0); |
| 808 | c->hook_in = 0; /* allow hook to work again once it is complete */ |
| 809 | } |
| 810 | |
| 811 | } |
| 812 | |
| 813 | /* Tell the user if the language has changed (except first time). */ |
| 814 | if (current_language != expected_language) |
| 815 | { |
| 816 | if (language_mode == language_mode_auto) |
| 817 | { |
| 818 | language_info (1); /* Print what changed. */ |
| 819 | } |
| 820 | warned = 0; |
| 821 | } |
| 822 | |
| 823 | /* Warn the user if the working language does not match the |
| 824 | language of the current frame. Only warn the user if we are |
| 825 | actually running the program, i.e. there is a stack. */ |
| 826 | /* FIXME: This should be cacheing the frame and only running when |
| 827 | the frame changes. */ |
| 828 | |
| 829 | if (target_has_stack) |
| 830 | { |
| 831 | flang = get_frame_language (); |
| 832 | if (!warned |
| 833 | && flang != language_unknown |
| 834 | && flang != current_language->la_language) |
| 835 | { |
| 836 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 837 | warned = 1; |
| 838 | } |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | /* Read commands from `instream' and execute them |
| 843 | until end of file or error reading instream. */ |
| 844 | |
| 845 | void |
| 846 | command_loop (void) |
| 847 | { |
| 848 | struct cleanup *old_chain; |
| 849 | char *command; |
| 850 | int stdin_is_tty = ISATTY (stdin); |
| 851 | long time_at_cmd_start; |
| 852 | #ifdef HAVE_SBRK |
| 853 | long space_at_cmd_start = 0; |
| 854 | #endif |
| 855 | extern int display_time; |
| 856 | extern int display_space; |
| 857 | |
| 858 | while (instream && !feof (instream)) |
| 859 | { |
| 860 | #if defined(TUI) |
| 861 | extern int insert_mode; |
| 862 | #endif |
| 863 | if (window_hook && instream == stdin) |
| 864 | (*window_hook) (instream, get_prompt ()); |
| 865 | |
| 866 | quit_flag = 0; |
| 867 | if (instream == stdin && stdin_is_tty) |
| 868 | reinitialize_more_filter (); |
| 869 | old_chain = make_cleanup (null_cleanup, 0); |
| 870 | |
| 871 | #if defined(TUI) |
| 872 | /* A bit of paranoia: I want to make sure the "insert_mode" global |
| 873 | * is clear except when it is being used for command-line editing |
| 874 | * (see tuiIO.c, utils.c); otherwise normal output will |
| 875 | * get messed up in the TUI. So clear it before/after |
| 876 | * the command-line-input call. - RT |
| 877 | */ |
| 878 | insert_mode = 0; |
| 879 | #endif |
| 880 | /* Get a command-line. This calls the readline package. */ |
| 881 | command = command_line_input (instream == stdin ? |
| 882 | get_prompt () : (char *) NULL, |
| 883 | instream == stdin, "prompt"); |
| 884 | #if defined(TUI) |
| 885 | insert_mode = 0; |
| 886 | #endif |
| 887 | if (command == 0) |
| 888 | return; |
| 889 | |
| 890 | time_at_cmd_start = get_run_time (); |
| 891 | |
| 892 | if (display_space) |
| 893 | { |
| 894 | #ifdef HAVE_SBRK |
| 895 | extern char **environ; |
| 896 | char *lim = (char *) sbrk (0); |
| 897 | |
| 898 | space_at_cmd_start = (long) (lim - (char *) &environ); |
| 899 | #endif |
| 900 | } |
| 901 | |
| 902 | execute_command (command, instream == stdin); |
| 903 | /* Do any commands attached to breakpoint we stopped at. */ |
| 904 | bpstat_do_actions (&stop_bpstat); |
| 905 | do_cleanups (old_chain); |
| 906 | |
| 907 | if (display_time) |
| 908 | { |
| 909 | long cmd_time = get_run_time () - time_at_cmd_start; |
| 910 | |
| 911 | printf_unfiltered ("Command execution time: %ld.%06ld\n", |
| 912 | cmd_time / 1000000, cmd_time % 1000000); |
| 913 | } |
| 914 | |
| 915 | if (display_space) |
| 916 | { |
| 917 | #ifdef HAVE_SBRK |
| 918 | extern char **environ; |
| 919 | char *lim = (char *) sbrk (0); |
| 920 | long space_now = lim - (char *) &environ; |
| 921 | long space_diff = space_now - space_at_cmd_start; |
| 922 | |
| 923 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", |
| 924 | space_now, |
| 925 | (space_diff >= 0 ? '+' : '-'), |
| 926 | space_diff); |
| 927 | #endif |
| 928 | } |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | /* Read commands from `instream' and execute them until end of file or |
| 933 | error reading instream. This command loop doesnt care about any |
| 934 | such things as displaying time and space usage. If the user asks |
| 935 | for those, they won't work. */ |
| 936 | void |
| 937 | simplified_command_loop (char *(*read_input_func) (char *), |
| 938 | void (*execute_command_func) (char *, int)) |
| 939 | { |
| 940 | struct cleanup *old_chain; |
| 941 | char *command; |
| 942 | int stdin_is_tty = ISATTY (stdin); |
| 943 | |
| 944 | while (instream && !feof (instream)) |
| 945 | { |
| 946 | quit_flag = 0; |
| 947 | if (instream == stdin && stdin_is_tty) |
| 948 | reinitialize_more_filter (); |
| 949 | old_chain = make_cleanup (null_cleanup, 0); |
| 950 | |
| 951 | /* Get a command-line. */ |
| 952 | command = (*read_input_func) (instream == stdin ? |
| 953 | get_prompt () : (char *) NULL); |
| 954 | |
| 955 | if (command == 0) |
| 956 | return; |
| 957 | |
| 958 | (*execute_command_func) (command, instream == stdin); |
| 959 | |
| 960 | /* Do any commands attached to breakpoint we stopped at. */ |
| 961 | bpstat_do_actions (&stop_bpstat); |
| 962 | |
| 963 | do_cleanups (old_chain); |
| 964 | } |
| 965 | } |
| 966 | \f |
| 967 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 968 | |
| 969 | void |
| 970 | dont_repeat (void) |
| 971 | { |
| 972 | if (server_command) |
| 973 | return; |
| 974 | |
| 975 | /* If we aren't reading from standard input, we are saving the last |
| 976 | thing read from stdin in line and don't want to delete it. Null lines |
| 977 | won't repeat here in any case. */ |
| 978 | if (instream == stdin) |
| 979 | *line = 0; |
| 980 | } |
| 981 | \f |
| 982 | /* Read a line from the stream "instream" without command line editing. |
| 983 | |
| 984 | It prints PROMPT_ARG once at the start. |
| 985 | Action is compatible with "readline", e.g. space for the result is |
| 986 | malloc'd and should be freed by the caller. |
| 987 | |
| 988 | A NULL return means end of file. */ |
| 989 | char * |
| 990 | gdb_readline (char *prompt_arg) |
| 991 | { |
| 992 | int c; |
| 993 | char *result; |
| 994 | int input_index = 0; |
| 995 | int result_size = 80; |
| 996 | |
| 997 | if (prompt_arg) |
| 998 | { |
| 999 | /* Don't use a _filtered function here. It causes the assumed |
| 1000 | character position to be off, since the newline we read from |
| 1001 | the user is not accounted for. */ |
| 1002 | fputs_unfiltered (prompt_arg, gdb_stdout); |
| 1003 | #ifdef MPW |
| 1004 | /* Move to a new line so the entered line doesn't have a prompt |
| 1005 | on the front of it. */ |
| 1006 | fputs_unfiltered ("\n", gdb_stdout); |
| 1007 | #endif /* MPW */ |
| 1008 | gdb_flush (gdb_stdout); |
| 1009 | } |
| 1010 | |
| 1011 | result = (char *) xmalloc (result_size); |
| 1012 | |
| 1013 | while (1) |
| 1014 | { |
| 1015 | /* Read from stdin if we are executing a user defined command. |
| 1016 | This is the right thing for prompt_for_continue, at least. */ |
| 1017 | c = fgetc (instream ? instream : stdin); |
| 1018 | |
| 1019 | if (c == EOF) |
| 1020 | { |
| 1021 | if (input_index > 0) |
| 1022 | /* The last line does not end with a newline. Return it, and |
| 1023 | if we are called again fgetc will still return EOF and |
| 1024 | we'll return NULL then. */ |
| 1025 | break; |
| 1026 | xfree (result); |
| 1027 | return NULL; |
| 1028 | } |
| 1029 | |
| 1030 | if (c == '\n') |
| 1031 | #ifndef CRLF_SOURCE_FILES |
| 1032 | break; |
| 1033 | #else |
| 1034 | { |
| 1035 | if (input_index > 0 && result[input_index - 1] == '\r') |
| 1036 | input_index--; |
| 1037 | break; |
| 1038 | } |
| 1039 | #endif |
| 1040 | |
| 1041 | result[input_index++] = c; |
| 1042 | while (input_index >= result_size) |
| 1043 | { |
| 1044 | result_size *= 2; |
| 1045 | result = (char *) xrealloc (result, result_size); |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | result[input_index++] = '\0'; |
| 1050 | return result; |
| 1051 | } |
| 1052 | |
| 1053 | /* Variables which control command line editing and history |
| 1054 | substitution. These variables are given default values at the end |
| 1055 | of this file. */ |
| 1056 | static int command_editing_p; |
| 1057 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 1058 | gdb to use the event loop as the default command loop and we merge |
| 1059 | event-top.c into this file, top.c */ |
| 1060 | /* static */ int history_expansion_p; |
| 1061 | static int write_history_p; |
| 1062 | static int history_size; |
| 1063 | static char *history_filename; |
| 1064 | |
| 1065 | /* Functions that are used as part of the fancy command line editing. */ |
| 1066 | |
| 1067 | /* This can be used for functions which don't want to complete on symbols |
| 1068 | but don't want to complete on anything else either. */ |
| 1069 | /* ARGSUSED */ |
| 1070 | char ** |
| 1071 | noop_completer (char *text, char *prefix) |
| 1072 | { |
| 1073 | return NULL; |
| 1074 | } |
| 1075 | |
| 1076 | /* Line completion interface function for readline. */ |
| 1077 | |
| 1078 | static char * |
| 1079 | readline_line_completion_function (char *text, int matches) |
| 1080 | { |
| 1081 | return line_completion_function (text, matches, rl_line_buffer, rl_point); |
| 1082 | } |
| 1083 | \f |
| 1084 | #ifdef STOP_SIGNAL |
| 1085 | static void |
| 1086 | stop_sig (int signo) |
| 1087 | { |
| 1088 | #if STOP_SIGNAL == SIGTSTP |
| 1089 | signal (SIGTSTP, SIG_DFL); |
| 1090 | sigsetmask (0); |
| 1091 | kill (getpid (), SIGTSTP); |
| 1092 | signal (SIGTSTP, stop_sig); |
| 1093 | #else |
| 1094 | signal (STOP_SIGNAL, stop_sig); |
| 1095 | #endif |
| 1096 | printf_unfiltered ("%s", get_prompt ()); |
| 1097 | gdb_flush (gdb_stdout); |
| 1098 | |
| 1099 | /* Forget about any previous command -- null line now will do nothing. */ |
| 1100 | dont_repeat (); |
| 1101 | } |
| 1102 | #endif /* STOP_SIGNAL */ |
| 1103 | |
| 1104 | /* Initialize signal handlers. */ |
| 1105 | static void |
| 1106 | do_nothing (int signo) |
| 1107 | { |
| 1108 | /* Under System V the default disposition of a signal is reinstated after |
| 1109 | the signal is caught and delivered to an application process. On such |
| 1110 | systems one must restore the replacement signal handler if one wishes |
| 1111 | to continue handling the signal in one's program. On BSD systems this |
| 1112 | is not needed but it is harmless, and it simplifies the code to just do |
| 1113 | it unconditionally. */ |
| 1114 | signal (signo, do_nothing); |
| 1115 | } |
| 1116 | |
| 1117 | static void |
| 1118 | init_signals (void) |
| 1119 | { |
| 1120 | signal (SIGINT, request_quit); |
| 1121 | |
| 1122 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed |
| 1123 | to the inferior and breakpoints will be ignored. */ |
| 1124 | #ifdef SIGTRAP |
| 1125 | signal (SIGTRAP, SIG_DFL); |
| 1126 | #endif |
| 1127 | |
| 1128 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
| 1129 | passed to the inferior, which we don't want. It would be |
| 1130 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but |
| 1131 | on BSD4.3 systems using vfork, that can affect the |
| 1132 | GDB process as well as the inferior (the signal handling tables |
| 1133 | might be in memory, shared between the two). Since we establish |
| 1134 | a handler for SIGQUIT, when we call exec it will set the signal |
| 1135 | to SIG_DFL for us. */ |
| 1136 | signal (SIGQUIT, do_nothing); |
| 1137 | #ifdef SIGHUP |
| 1138 | if (signal (SIGHUP, do_nothing) != SIG_IGN) |
| 1139 | signal (SIGHUP, disconnect); |
| 1140 | #endif |
| 1141 | signal (SIGFPE, float_handler); |
| 1142 | |
| 1143 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
| 1144 | signal (SIGWINCH, SIGWINCH_HANDLER); |
| 1145 | #endif |
| 1146 | } |
| 1147 | \f |
| 1148 | /* Read one line from the command input stream `instream' |
| 1149 | into the local static buffer `linebuffer' (whose current length |
| 1150 | is `linelength'). |
| 1151 | The buffer is made bigger as necessary. |
| 1152 | Returns the address of the start of the line. |
| 1153 | |
| 1154 | NULL is returned for end of file. |
| 1155 | |
| 1156 | *If* the instream == stdin & stdin is a terminal, the line read |
| 1157 | is copied into the file line saver (global var char *line, |
| 1158 | length linesize) so that it can be duplicated. |
| 1159 | |
| 1160 | This routine either uses fancy command line editing or |
| 1161 | simple input as the user has requested. */ |
| 1162 | |
| 1163 | char * |
| 1164 | command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) |
| 1165 | { |
| 1166 | static char *linebuffer = 0; |
| 1167 | static unsigned linelength = 0; |
| 1168 | register char *p; |
| 1169 | char *p1; |
| 1170 | char *rl; |
| 1171 | char *local_prompt = prompt_arg; |
| 1172 | char *nline; |
| 1173 | char got_eof = 0; |
| 1174 | |
| 1175 | /* The annotation suffix must be non-NULL. */ |
| 1176 | if (annotation_suffix == NULL) |
| 1177 | annotation_suffix = ""; |
| 1178 | |
| 1179 | if (annotation_level > 1 && instream == stdin) |
| 1180 | { |
| 1181 | local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) |
| 1182 | + strlen (annotation_suffix) + 40); |
| 1183 | if (prompt_arg == NULL) |
| 1184 | local_prompt[0] = '\0'; |
| 1185 | else |
| 1186 | strcpy (local_prompt, prompt_arg); |
| 1187 | strcat (local_prompt, "\n\032\032"); |
| 1188 | strcat (local_prompt, annotation_suffix); |
| 1189 | strcat (local_prompt, "\n"); |
| 1190 | } |
| 1191 | |
| 1192 | if (linebuffer == 0) |
| 1193 | { |
| 1194 | linelength = 80; |
| 1195 | linebuffer = (char *) xmalloc (linelength); |
| 1196 | } |
| 1197 | |
| 1198 | p = linebuffer; |
| 1199 | |
| 1200 | /* Control-C quits instantly if typed while in this loop |
| 1201 | since it should not wait until the user types a newline. */ |
| 1202 | immediate_quit++; |
| 1203 | #ifdef STOP_SIGNAL |
| 1204 | if (job_control) |
| 1205 | { |
| 1206 | if (event_loop_p) |
| 1207 | signal (STOP_SIGNAL, handle_stop_sig); |
| 1208 | else |
| 1209 | signal (STOP_SIGNAL, stop_sig); |
| 1210 | } |
| 1211 | #endif |
| 1212 | |
| 1213 | while (1) |
| 1214 | { |
| 1215 | /* Make sure that all output has been output. Some machines may let |
| 1216 | you get away with leaving out some of the gdb_flush, but not all. */ |
| 1217 | wrap_here (""); |
| 1218 | gdb_flush (gdb_stdout); |
| 1219 | gdb_flush (gdb_stderr); |
| 1220 | |
| 1221 | if (source_file_name != NULL) |
| 1222 | { |
| 1223 | ++source_line_number; |
| 1224 | sprintf (source_error, |
| 1225 | "%s%s:%d: Error in sourced command file:\n", |
| 1226 | source_pre_error, |
| 1227 | source_file_name, |
| 1228 | source_line_number); |
| 1229 | error_pre_print = source_error; |
| 1230 | } |
| 1231 | |
| 1232 | if (annotation_level > 1 && instream == stdin) |
| 1233 | { |
| 1234 | printf_unfiltered ("\n\032\032pre-"); |
| 1235 | printf_unfiltered (annotation_suffix); |
| 1236 | printf_unfiltered ("\n"); |
| 1237 | } |
| 1238 | |
| 1239 | /* Don't use fancy stuff if not talking to stdin. */ |
| 1240 | if (readline_hook && instream == NULL) |
| 1241 | { |
| 1242 | rl = (*readline_hook) (local_prompt); |
| 1243 | } |
| 1244 | else if (command_editing_p && instream == stdin && ISATTY (instream)) |
| 1245 | { |
| 1246 | rl = readline (local_prompt); |
| 1247 | } |
| 1248 | else |
| 1249 | { |
| 1250 | rl = gdb_readline (local_prompt); |
| 1251 | } |
| 1252 | |
| 1253 | if (annotation_level > 1 && instream == stdin) |
| 1254 | { |
| 1255 | printf_unfiltered ("\n\032\032post-"); |
| 1256 | printf_unfiltered (annotation_suffix); |
| 1257 | printf_unfiltered ("\n"); |
| 1258 | } |
| 1259 | |
| 1260 | if (!rl || rl == (char *) EOF) |
| 1261 | { |
| 1262 | got_eof = 1; |
| 1263 | break; |
| 1264 | } |
| 1265 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
| 1266 | { |
| 1267 | linelength = strlen (rl) + 1 + (p - linebuffer); |
| 1268 | nline = (char *) xrealloc (linebuffer, linelength); |
| 1269 | p += nline - linebuffer; |
| 1270 | linebuffer = nline; |
| 1271 | } |
| 1272 | p1 = rl; |
| 1273 | /* Copy line. Don't copy null at end. (Leaves line alone |
| 1274 | if this was just a newline) */ |
| 1275 | while (*p1) |
| 1276 | *p++ = *p1++; |
| 1277 | |
| 1278 | xfree (rl); /* Allocated in readline. */ |
| 1279 | |
| 1280 | if (p == linebuffer || *(p - 1) != '\\') |
| 1281 | break; |
| 1282 | |
| 1283 | p--; /* Put on top of '\'. */ |
| 1284 | local_prompt = (char *) 0; |
| 1285 | } |
| 1286 | |
| 1287 | #ifdef STOP_SIGNAL |
| 1288 | if (job_control) |
| 1289 | signal (STOP_SIGNAL, SIG_DFL); |
| 1290 | #endif |
| 1291 | immediate_quit--; |
| 1292 | |
| 1293 | if (got_eof) |
| 1294 | return NULL; |
| 1295 | |
| 1296 | #define SERVER_COMMAND_LENGTH 7 |
| 1297 | server_command = |
| 1298 | (p - linebuffer > SERVER_COMMAND_LENGTH) |
| 1299 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); |
| 1300 | if (server_command) |
| 1301 | { |
| 1302 | /* Note that we don't set `line'. Between this and the check in |
| 1303 | dont_repeat, this insures that repeating will still do the |
| 1304 | right thing. */ |
| 1305 | *p = '\0'; |
| 1306 | return linebuffer + SERVER_COMMAND_LENGTH; |
| 1307 | } |
| 1308 | |
| 1309 | /* Do history expansion if that is wished. */ |
| 1310 | if (history_expansion_p && instream == stdin |
| 1311 | && ISATTY (instream)) |
| 1312 | { |
| 1313 | char *history_value; |
| 1314 | int expanded; |
| 1315 | |
| 1316 | *p = '\0'; /* Insert null now. */ |
| 1317 | expanded = history_expand (linebuffer, &history_value); |
| 1318 | if (expanded) |
| 1319 | { |
| 1320 | /* Print the changes. */ |
| 1321 | printf_unfiltered ("%s\n", history_value); |
| 1322 | |
| 1323 | /* If there was an error, call this function again. */ |
| 1324 | if (expanded < 0) |
| 1325 | { |
| 1326 | xfree (history_value); |
| 1327 | return command_line_input (prompt_arg, repeat, annotation_suffix); |
| 1328 | } |
| 1329 | if (strlen (history_value) > linelength) |
| 1330 | { |
| 1331 | linelength = strlen (history_value) + 1; |
| 1332 | linebuffer = (char *) xrealloc (linebuffer, linelength); |
| 1333 | } |
| 1334 | strcpy (linebuffer, history_value); |
| 1335 | p = linebuffer + strlen (linebuffer); |
| 1336 | xfree (history_value); |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | /* If we just got an empty line, and that is supposed |
| 1341 | to repeat the previous command, return the value in the |
| 1342 | global buffer. */ |
| 1343 | if (repeat && p == linebuffer) |
| 1344 | return line; |
| 1345 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); |
| 1346 | if (repeat && !*p1) |
| 1347 | return line; |
| 1348 | |
| 1349 | *p = 0; |
| 1350 | |
| 1351 | /* Add line to history if appropriate. */ |
| 1352 | if (instream == stdin |
| 1353 | && ISATTY (stdin) && *linebuffer) |
| 1354 | add_history (linebuffer); |
| 1355 | |
| 1356 | /* Note: lines consisting solely of comments are added to the command |
| 1357 | history. This is useful when you type a command, and then |
| 1358 | realize you don't want to execute it quite yet. You can comment |
| 1359 | out the command and then later fetch it from the value history |
| 1360 | and remove the '#'. The kill ring is probably better, but some |
| 1361 | people are in the habit of commenting things out. */ |
| 1362 | if (*p1 == '#') |
| 1363 | *p1 = '\0'; /* Found a comment. */ |
| 1364 | |
| 1365 | /* Save into global buffer if appropriate. */ |
| 1366 | if (repeat) |
| 1367 | { |
| 1368 | if (linelength > linesize) |
| 1369 | { |
| 1370 | line = xrealloc (line, linelength); |
| 1371 | linesize = linelength; |
| 1372 | } |
| 1373 | strcpy (line, linebuffer); |
| 1374 | return line; |
| 1375 | } |
| 1376 | |
| 1377 | return linebuffer; |
| 1378 | } |
| 1379 | \f |
| 1380 | /* Print the GDB banner. */ |
| 1381 | void |
| 1382 | print_gdb_version (struct ui_file *stream) |
| 1383 | { |
| 1384 | /* From GNU coding standards, first line is meant to be easy for a |
| 1385 | program to parse, and is just canonical program name and version |
| 1386 | number, which starts after last space. */ |
| 1387 | |
| 1388 | #ifdef MI_OUT |
| 1389 | /* Print it console style until a format is defined */ |
| 1390 | fprintf_filtered (stream, "GNU gdb %s (MI_OUT)\n", version); |
| 1391 | #else |
| 1392 | fprintf_filtered (stream, "GNU gdb %s\n", version); |
| 1393 | #endif |
| 1394 | |
| 1395 | /* Second line is a copyright notice. */ |
| 1396 | |
| 1397 | fprintf_filtered (stream, "Copyright 2000 Free Software Foundation, Inc.\n"); |
| 1398 | |
| 1399 | /* Following the copyright is a brief statement that the program is |
| 1400 | free software, that users are free to copy and change it on |
| 1401 | certain conditions, that it is covered by the GNU GPL, and that |
| 1402 | there is no warranty. */ |
| 1403 | |
| 1404 | fprintf_filtered (stream, "\ |
| 1405 | GDB is free software, covered by the GNU General Public License, and you are\n\ |
| 1406 | welcome to change it and/or distribute copies of it under certain conditions.\n\ |
| 1407 | Type \"show copying\" to see the conditions.\n\ |
| 1408 | There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n"); |
| 1409 | |
| 1410 | /* After the required info we print the configuration information. */ |
| 1411 | |
| 1412 | fprintf_filtered (stream, "This GDB was configured as \""); |
| 1413 | if (!STREQ (host_name, target_name)) |
| 1414 | { |
| 1415 | fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); |
| 1416 | } |
| 1417 | else |
| 1418 | { |
| 1419 | fprintf_filtered (stream, "%s", host_name); |
| 1420 | } |
| 1421 | fprintf_filtered (stream, "\"."); |
| 1422 | } |
| 1423 | \f |
| 1424 | /* get_prompt: access method for the GDB prompt string. */ |
| 1425 | |
| 1426 | #define MAX_PROMPT_SIZE 256 |
| 1427 | |
| 1428 | /* |
| 1429 | * int get_prompt_1 (char * buf); |
| 1430 | * |
| 1431 | * Work-horse for get_prompt (called via catch_errors). |
| 1432 | * Argument is buffer to hold the formatted prompt. |
| 1433 | * |
| 1434 | * Returns: 1 for success (use formatted prompt) |
| 1435 | * 0 for failure (use gdb_prompt_string). |
| 1436 | */ |
| 1437 | |
| 1438 | static int gdb_prompt_escape; |
| 1439 | |
| 1440 | static int |
| 1441 | get_prompt_1 (void *data) |
| 1442 | { |
| 1443 | char *formatted_prompt = data; |
| 1444 | char *local_prompt; |
| 1445 | |
| 1446 | if (event_loop_p) |
| 1447 | local_prompt = PROMPT (0); |
| 1448 | else |
| 1449 | local_prompt = gdb_prompt_string; |
| 1450 | |
| 1451 | |
| 1452 | if (gdb_prompt_escape == 0) |
| 1453 | { |
| 1454 | return 0; /* do no formatting */ |
| 1455 | } |
| 1456 | else |
| 1457 | /* formatted prompt */ |
| 1458 | { |
| 1459 | char fmt[40], *promptp, *outp, *tmp; |
| 1460 | value_ptr arg_val; |
| 1461 | DOUBLEST doubleval; |
| 1462 | LONGEST longval; |
| 1463 | CORE_ADDR addrval; |
| 1464 | |
| 1465 | int i, len; |
| 1466 | struct type *arg_type, *elt_type; |
| 1467 | |
| 1468 | promptp = local_prompt; |
| 1469 | outp = formatted_prompt; |
| 1470 | |
| 1471 | while (*promptp != '\0') |
| 1472 | { |
| 1473 | int available = MAX_PROMPT_SIZE - (outp - formatted_prompt) - 1; |
| 1474 | |
| 1475 | if (*promptp != gdb_prompt_escape) |
| 1476 | { |
| 1477 | if (available >= 1) /* overflow protect */ |
| 1478 | *outp++ = *promptp++; |
| 1479 | } |
| 1480 | else |
| 1481 | { |
| 1482 | /* GDB prompt string contains escape char. Parse for arg. |
| 1483 | Two consecutive escape chars followed by arg followed by |
| 1484 | a comma means to insert the arg using a default format. |
| 1485 | Otherwise a printf format string may be included between |
| 1486 | the two escape chars. eg: |
| 1487 | %%foo, insert foo using default format |
| 1488 | %2.2f%foo, insert foo using "%2.2f" format |
| 1489 | A mismatch between the format string and the data type |
| 1490 | of "foo" is an error (which we don't know how to protect |
| 1491 | against). */ |
| 1492 | |
| 1493 | fmt[0] = '\0'; /* assume null format string */ |
| 1494 | if (promptp[1] == gdb_prompt_escape) /* double esc char */ |
| 1495 | { |
| 1496 | promptp += 2; /* skip past two escape chars. */ |
| 1497 | } |
| 1498 | else |
| 1499 | { |
| 1500 | /* extract format string from between two esc chars */ |
| 1501 | i = 0; |
| 1502 | do |
| 1503 | { |
| 1504 | fmt[i++] = *promptp++; /* copy format string */ |
| 1505 | } |
| 1506 | while (i < sizeof (fmt) - 1 && |
| 1507 | *promptp != gdb_prompt_escape && |
| 1508 | *promptp != '\0'); |
| 1509 | |
| 1510 | if (*promptp != gdb_prompt_escape) |
| 1511 | error ("Syntax error at prompt position %d", |
| 1512 | promptp - local_prompt); |
| 1513 | else |
| 1514 | { |
| 1515 | promptp++; /* skip second escape char */ |
| 1516 | fmt[i++] = '\0'; /* terminate the format string */ |
| 1517 | } |
| 1518 | } |
| 1519 | |
| 1520 | arg_val = parse_to_comma_and_eval (&promptp); |
| 1521 | if (*promptp == ',') |
| 1522 | promptp++; /* skip past the comma */ |
| 1523 | arg_type = check_typedef (VALUE_TYPE (arg_val)); |
| 1524 | switch (TYPE_CODE (arg_type)) |
| 1525 | { |
| 1526 | case TYPE_CODE_ARRAY: |
| 1527 | elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| 1528 | if (TYPE_LENGTH (arg_type) > 0 && |
| 1529 | TYPE_LENGTH (elt_type) == 1 && |
| 1530 | TYPE_CODE (elt_type) == TYPE_CODE_INT) |
| 1531 | { |
| 1532 | int len = TYPE_LENGTH (arg_type); |
| 1533 | |
| 1534 | if (VALUE_LAZY (arg_val)) |
| 1535 | value_fetch_lazy (arg_val); |
| 1536 | tmp = VALUE_CONTENTS (arg_val); |
| 1537 | |
| 1538 | if (len > available) |
| 1539 | len = available; /* overflow protect */ |
| 1540 | |
| 1541 | /* FIXME: how to protect GDB from crashing |
| 1542 | from bad user-supplied format string? */ |
| 1543 | if (fmt[0] != 0) |
| 1544 | sprintf (outp, fmt, tmp); |
| 1545 | else |
| 1546 | strncpy (outp, tmp, len); |
| 1547 | outp[len] = '\0'; |
| 1548 | } |
| 1549 | break; |
| 1550 | case TYPE_CODE_PTR: |
| 1551 | elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| 1552 | addrval = value_as_pointer (arg_val); |
| 1553 | |
| 1554 | if (TYPE_LENGTH (elt_type) == 1 && |
| 1555 | TYPE_CODE (elt_type) == TYPE_CODE_INT && |
| 1556 | addrval != 0) |
| 1557 | { |
| 1558 | /* display it as a string */ |
| 1559 | char *default_fmt = "%s"; |
| 1560 | char *tmp; |
| 1561 | int err = 0; |
| 1562 | |
| 1563 | /* Limiting the number of bytes that the following call |
| 1564 | will read protects us from sprintf overflow later. */ |
| 1565 | i = target_read_string (addrval, /* src */ |
| 1566 | &tmp, /* dest */ |
| 1567 | available, /* len */ |
| 1568 | &err); |
| 1569 | if (err) /* read failed */ |
| 1570 | error ("%s on target_read", safe_strerror (err)); |
| 1571 | |
| 1572 | tmp[i] = '\0'; /* force-terminate string */ |
| 1573 | /* FIXME: how to protect GDB from crashing |
| 1574 | from bad user-supplied format string? */ |
| 1575 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| 1576 | tmp); |
| 1577 | xfree (tmp); |
| 1578 | } |
| 1579 | else |
| 1580 | { |
| 1581 | /* display it as a pointer */ |
| 1582 | char *default_fmt = "0x%x"; |
| 1583 | |
| 1584 | /* FIXME: how to protect GDB from crashing |
| 1585 | from bad user-supplied format string? */ |
| 1586 | if (available >= 16 /*? */ ) /* overflow protect */ |
| 1587 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| 1588 | (long) addrval); |
| 1589 | } |
| 1590 | break; |
| 1591 | case TYPE_CODE_FLT: |
| 1592 | { |
| 1593 | char *default_fmt = "%g"; |
| 1594 | |
| 1595 | doubleval = value_as_double (arg_val); |
| 1596 | /* FIXME: how to protect GDB from crashing |
| 1597 | from bad user-supplied format string? */ |
| 1598 | if (available >= 16 /*? */ ) /* overflow protect */ |
| 1599 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| 1600 | (double) doubleval); |
| 1601 | break; |
| 1602 | } |
| 1603 | case TYPE_CODE_INT: |
| 1604 | { |
| 1605 | char *default_fmt = "%d"; |
| 1606 | |
| 1607 | longval = value_as_long (arg_val); |
| 1608 | /* FIXME: how to protect GDB from crashing |
| 1609 | from bad user-supplied format string? */ |
| 1610 | if (available >= 16 /*? */ ) /* overflow protect */ |
| 1611 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| 1612 | (long) longval); |
| 1613 | break; |
| 1614 | } |
| 1615 | case TYPE_CODE_BOOL: |
| 1616 | { |
| 1617 | /* no default format for bool */ |
| 1618 | longval = value_as_long (arg_val); |
| 1619 | if (available >= 8 /*? */ ) /* overflow protect */ |
| 1620 | { |
| 1621 | if (longval) |
| 1622 | strcpy (outp, "<true>"); |
| 1623 | else |
| 1624 | strcpy (outp, "<false>"); |
| 1625 | } |
| 1626 | break; |
| 1627 | } |
| 1628 | case TYPE_CODE_ENUM: |
| 1629 | { |
| 1630 | /* no default format for enum */ |
| 1631 | longval = value_as_long (arg_val); |
| 1632 | len = TYPE_NFIELDS (arg_type); |
| 1633 | /* find enum name if possible */ |
| 1634 | for (i = 0; i < len; i++) |
| 1635 | if (TYPE_FIELD_BITPOS (arg_type, i) == longval) |
| 1636 | break; /* match -- end loop */ |
| 1637 | |
| 1638 | if (i < len) /* enum name found */ |
| 1639 | { |
| 1640 | char *name = TYPE_FIELD_NAME (arg_type, i); |
| 1641 | |
| 1642 | strncpy (outp, name, available); |
| 1643 | /* in casel available < strlen (name), */ |
| 1644 | outp[available] = '\0'; |
| 1645 | } |
| 1646 | else |
| 1647 | { |
| 1648 | if (available >= 16 /*? */ ) /* overflow protect */ |
| 1649 | sprintf (outp, "%ld", (long) longval); |
| 1650 | } |
| 1651 | break; |
| 1652 | } |
| 1653 | case TYPE_CODE_VOID: |
| 1654 | *outp = '\0'; |
| 1655 | break; /* void type -- no output */ |
| 1656 | default: |
| 1657 | error ("bad data type at prompt position %d", |
| 1658 | promptp - local_prompt); |
| 1659 | break; |
| 1660 | } |
| 1661 | outp += strlen (outp); |
| 1662 | } |
| 1663 | } |
| 1664 | *outp++ = '\0'; /* terminate prompt string */ |
| 1665 | return 1; |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | char * |
| 1670 | get_prompt (void) |
| 1671 | { |
| 1672 | static char buf[MAX_PROMPT_SIZE]; |
| 1673 | |
| 1674 | if (catch_errors (get_prompt_1, buf, "bad formatted prompt: ", |
| 1675 | RETURN_MASK_ALL)) |
| 1676 | { |
| 1677 | return &buf[0]; /* successful formatted prompt */ |
| 1678 | } |
| 1679 | else |
| 1680 | { |
| 1681 | /* Prompt could not be formatted. */ |
| 1682 | if (event_loop_p) |
| 1683 | return PROMPT (0); |
| 1684 | else |
| 1685 | return gdb_prompt_string; |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | void |
| 1690 | set_prompt (char *s) |
| 1691 | { |
| 1692 | /* ??rehrauer: I don't know why this fails, since it looks as though |
| 1693 | assignments to prompt are wrapped in calls to savestring... |
| 1694 | if (prompt != NULL) |
| 1695 | xfree (prompt); |
| 1696 | */ |
| 1697 | if (event_loop_p) |
| 1698 | PROMPT (0) = savestring (s, strlen (s)); |
| 1699 | else |
| 1700 | gdb_prompt_string = savestring (s, strlen (s)); |
| 1701 | } |
| 1702 | \f |
| 1703 | |
| 1704 | /* If necessary, make the user confirm that we should quit. Return |
| 1705 | non-zero if we should quit, zero if we shouldn't. */ |
| 1706 | |
| 1707 | int |
| 1708 | quit_confirm (void) |
| 1709 | { |
| 1710 | if (inferior_pid != 0 && target_has_execution) |
| 1711 | { |
| 1712 | char *s; |
| 1713 | |
| 1714 | /* This is something of a hack. But there's no reliable way to |
| 1715 | see if a GUI is running. The `use_windows' variable doesn't |
| 1716 | cut it. */ |
| 1717 | if (init_ui_hook) |
| 1718 | s = "A debugging session is active.\nDo you still want to close the debugger?"; |
| 1719 | else if (attach_flag) |
| 1720 | s = "The program is running. Quit anyway (and detach it)? "; |
| 1721 | else |
| 1722 | s = "The program is running. Exit anyway? "; |
| 1723 | |
| 1724 | if (!query (s)) |
| 1725 | return 0; |
| 1726 | } |
| 1727 | |
| 1728 | return 1; |
| 1729 | } |
| 1730 | |
| 1731 | /* Quit without asking for confirmation. */ |
| 1732 | |
| 1733 | void |
| 1734 | quit_force (char *args, int from_tty) |
| 1735 | { |
| 1736 | int exit_code = 0; |
| 1737 | |
| 1738 | /* An optional expression may be used to cause gdb to terminate with the |
| 1739 | value of that expression. */ |
| 1740 | if (args) |
| 1741 | { |
| 1742 | value_ptr val = parse_and_eval (args); |
| 1743 | |
| 1744 | exit_code = (int) value_as_long (val); |
| 1745 | } |
| 1746 | |
| 1747 | if (inferior_pid != 0 && target_has_execution) |
| 1748 | { |
| 1749 | if (attach_flag) |
| 1750 | target_detach (args, from_tty); |
| 1751 | else |
| 1752 | target_kill (); |
| 1753 | } |
| 1754 | |
| 1755 | /* UDI wants this, to kill the TIP. */ |
| 1756 | target_close (1); |
| 1757 | |
| 1758 | /* Save the history information if it is appropriate to do so. */ |
| 1759 | if (write_history_p && history_filename) |
| 1760 | write_history (history_filename); |
| 1761 | |
| 1762 | do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ |
| 1763 | |
| 1764 | #if defined(TUI) |
| 1765 | /* tuiDo((TuiOpaqueFuncPtr)tuiCleanUp); */ |
| 1766 | /* The above does not need to be inside a tuiDo(), since |
| 1767 | * it is not manipulating the curses screen, but rather, |
| 1768 | * it is tearing it down. |
| 1769 | */ |
| 1770 | if (tui_version) |
| 1771 | tuiCleanUp (); |
| 1772 | #endif |
| 1773 | |
| 1774 | exit (exit_code); |
| 1775 | } |
| 1776 | |
| 1777 | /* Returns whether GDB is running on a terminal and whether the user |
| 1778 | desires that questions be asked of them on that terminal. */ |
| 1779 | |
| 1780 | int |
| 1781 | input_from_terminal_p (void) |
| 1782 | { |
| 1783 | return gdb_has_a_terminal () && (instream == stdin) & caution; |
| 1784 | } |
| 1785 | \f |
| 1786 | /* ARGSUSED */ |
| 1787 | static void |
| 1788 | dont_repeat_command (char *ignored, int from_tty) |
| 1789 | { |
| 1790 | *line = 0; /* Can't call dont_repeat here because we're not |
| 1791 | necessarily reading from stdin. */ |
| 1792 | } |
| 1793 | \f |
| 1794 | /* Functions to manipulate command line editing control variables. */ |
| 1795 | |
| 1796 | /* Number of commands to print in each call to show_commands. */ |
| 1797 | #define Hist_print 10 |
| 1798 | void |
| 1799 | show_commands (char *args, int from_tty) |
| 1800 | { |
| 1801 | /* Index for history commands. Relative to history_base. */ |
| 1802 | int offset; |
| 1803 | |
| 1804 | /* Number of the history entry which we are planning to display next. |
| 1805 | Relative to history_base. */ |
| 1806 | static int num = 0; |
| 1807 | |
| 1808 | /* The first command in the history which doesn't exist (i.e. one more |
| 1809 | than the number of the last command). Relative to history_base. */ |
| 1810 | int hist_len; |
| 1811 | |
| 1812 | extern HIST_ENTRY *history_get (int); |
| 1813 | |
| 1814 | /* Print out some of the commands from the command history. */ |
| 1815 | /* First determine the length of the history list. */ |
| 1816 | hist_len = history_size; |
| 1817 | for (offset = 0; offset < history_size; offset++) |
| 1818 | { |
| 1819 | if (!history_get (history_base + offset)) |
| 1820 | { |
| 1821 | hist_len = offset; |
| 1822 | break; |
| 1823 | } |
| 1824 | } |
| 1825 | |
| 1826 | if (args) |
| 1827 | { |
| 1828 | if (args[0] == '+' && args[1] == '\0') |
| 1829 | /* "info editing +" should print from the stored position. */ |
| 1830 | ; |
| 1831 | else |
| 1832 | /* "info editing <exp>" should print around command number <exp>. */ |
| 1833 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
| 1834 | } |
| 1835 | /* "show commands" means print the last Hist_print commands. */ |
| 1836 | else |
| 1837 | { |
| 1838 | num = hist_len - Hist_print; |
| 1839 | } |
| 1840 | |
| 1841 | if (num < 0) |
| 1842 | num = 0; |
| 1843 | |
| 1844 | /* If there are at least Hist_print commands, we want to display the last |
| 1845 | Hist_print rather than, say, the last 6. */ |
| 1846 | if (hist_len - num < Hist_print) |
| 1847 | { |
| 1848 | num = hist_len - Hist_print; |
| 1849 | if (num < 0) |
| 1850 | num = 0; |
| 1851 | } |
| 1852 | |
| 1853 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) |
| 1854 | { |
| 1855 | printf_filtered ("%5d %s\n", history_base + offset, |
| 1856 | (history_get (history_base + offset))->line); |
| 1857 | } |
| 1858 | |
| 1859 | /* The next command we want to display is the next one that we haven't |
| 1860 | displayed yet. */ |
| 1861 | num += Hist_print; |
| 1862 | |
| 1863 | /* If the user repeats this command with return, it should do what |
| 1864 | "show commands +" does. This is unnecessary if arg is null, |
| 1865 | because "show commands +" is not useful after "show commands". */ |
| 1866 | if (from_tty && args) |
| 1867 | { |
| 1868 | args[0] = '+'; |
| 1869 | args[1] = '\0'; |
| 1870 | } |
| 1871 | } |
| 1872 | |
| 1873 | /* Called by do_setshow_command. */ |
| 1874 | /* ARGSUSED */ |
| 1875 | static void |
| 1876 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1877 | { |
| 1878 | if (history_size == INT_MAX) |
| 1879 | unstifle_history (); |
| 1880 | else if (history_size >= 0) |
| 1881 | stifle_history (history_size); |
| 1882 | else |
| 1883 | { |
| 1884 | history_size = INT_MAX; |
| 1885 | error ("History size must be non-negative"); |
| 1886 | } |
| 1887 | } |
| 1888 | |
| 1889 | /* ARGSUSED */ |
| 1890 | void |
| 1891 | set_history (char *args, int from_tty) |
| 1892 | { |
| 1893 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); |
| 1894 | help_list (sethistlist, "set history ", -1, gdb_stdout); |
| 1895 | } |
| 1896 | |
| 1897 | /* ARGSUSED */ |
| 1898 | void |
| 1899 | show_history (char *args, int from_tty) |
| 1900 | { |
| 1901 | cmd_show_list (showhistlist, from_tty, ""); |
| 1902 | } |
| 1903 | |
| 1904 | int info_verbose = 0; /* Default verbose msgs off */ |
| 1905 | |
| 1906 | /* Called by do_setshow_command. An elaborate joke. */ |
| 1907 | /* ARGSUSED */ |
| 1908 | void |
| 1909 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
| 1910 | { |
| 1911 | char *cmdname = "verbose"; |
| 1912 | struct cmd_list_element *showcmd; |
| 1913 | |
| 1914 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 1915 | |
| 1916 | if (info_verbose) |
| 1917 | { |
| 1918 | c->doc = "Set verbose printing of informational messages."; |
| 1919 | showcmd->doc = "Show verbose printing of informational messages."; |
| 1920 | } |
| 1921 | else |
| 1922 | { |
| 1923 | c->doc = "Set verbosity."; |
| 1924 | showcmd->doc = "Show verbosity."; |
| 1925 | } |
| 1926 | } |
| 1927 | |
| 1928 | static void |
| 1929 | float_handler (int signo) |
| 1930 | { |
| 1931 | /* This message is based on ANSI C, section 4.7. Note that integer |
| 1932 | divide by zero causes this, so "float" is a misnomer. */ |
| 1933 | signal (SIGFPE, float_handler); |
| 1934 | error ("Erroneous arithmetic operation."); |
| 1935 | } |
| 1936 | |
| 1937 | /* Init the history buffer. Note that we are called after the init file(s) |
| 1938 | * have been read so that the user can change the history file via his |
| 1939 | * .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 1940 | * overrides all of this. |
| 1941 | */ |
| 1942 | |
| 1943 | void |
| 1944 | init_history (void) |
| 1945 | { |
| 1946 | char *tmpenv; |
| 1947 | |
| 1948 | tmpenv = getenv ("HISTSIZE"); |
| 1949 | if (tmpenv) |
| 1950 | history_size = atoi (tmpenv); |
| 1951 | else if (!history_size) |
| 1952 | history_size = 256; |
| 1953 | |
| 1954 | stifle_history (history_size); |
| 1955 | |
| 1956 | tmpenv = getenv ("GDBHISTFILE"); |
| 1957 | if (tmpenv) |
| 1958 | history_filename = savestring (tmpenv, strlen (tmpenv)); |
| 1959 | else if (!history_filename) |
| 1960 | { |
| 1961 | /* We include the current directory so that if the user changes |
| 1962 | directories the file written will be the same as the one |
| 1963 | that was read. */ |
| 1964 | #ifdef __MSDOS__ |
| 1965 | /* No leading dots in file names are allowed on MSDOS. */ |
| 1966 | history_filename = concat (current_directory, "/_gdb_history", NULL); |
| 1967 | #else |
| 1968 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
| 1969 | #endif |
| 1970 | } |
| 1971 | read_history (history_filename); |
| 1972 | } |
| 1973 | |
| 1974 | static void |
| 1975 | init_main (void) |
| 1976 | { |
| 1977 | struct cmd_list_element *c; |
| 1978 | |
| 1979 | /* If we are running the asynchronous version, |
| 1980 | we initialize the prompts differently. */ |
| 1981 | if (!event_loop_p) |
| 1982 | { |
| 1983 | gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
| 1984 | } |
| 1985 | else |
| 1986 | { |
| 1987 | /* initialize the prompt stack to a simple "(gdb) " prompt or to |
| 1988 | whatever the DEFAULT_PROMPT is. */ |
| 1989 | the_prompts.top = 0; |
| 1990 | PREFIX (0) = ""; |
| 1991 | PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
| 1992 | SUFFIX (0) = ""; |
| 1993 | /* Set things up for annotation_level > 1, if the user ever decides |
| 1994 | to use it. */ |
| 1995 | async_annotation_suffix = "prompt"; |
| 1996 | /* Set the variable associated with the setshow prompt command. */ |
| 1997 | new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); |
| 1998 | } |
| 1999 | gdb_prompt_escape = 0; /* default to none. */ |
| 2000 | |
| 2001 | /* Set the important stuff up for command editing. */ |
| 2002 | command_editing_p = 1; |
| 2003 | history_expansion_p = 0; |
| 2004 | write_history_p = 0; |
| 2005 | |
| 2006 | /* Setup important stuff for command line editing. */ |
| 2007 | rl_completion_entry_function = (int (*)()) readline_line_completion_function; |
| 2008 | rl_completer_word_break_characters = |
| 2009 | get_gdb_completer_word_break_characters (); |
| 2010 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
| 2011 | rl_readline_name = "gdb"; |
| 2012 | |
| 2013 | /* The set prompt command is different depending whether or not the |
| 2014 | async version is run. NOTE: this difference is going to |
| 2015 | disappear as we make the event loop be the default engine of |
| 2016 | gdb. */ |
| 2017 | if (!event_loop_p) |
| 2018 | { |
| 2019 | add_show_from_set |
| 2020 | (add_set_cmd ("prompt", class_support, var_string, |
| 2021 | (char *) &gdb_prompt_string, "Set gdb's prompt", |
| 2022 | &setlist), |
| 2023 | &showlist); |
| 2024 | } |
| 2025 | else |
| 2026 | { |
| 2027 | c = add_set_cmd ("prompt", class_support, var_string, |
| 2028 | (char *) &new_async_prompt, "Set gdb's prompt", |
| 2029 | &setlist); |
| 2030 | add_show_from_set (c, &showlist); |
| 2031 | c->function.sfunc = set_async_prompt; |
| 2032 | } |
| 2033 | |
| 2034 | add_show_from_set |
| 2035 | (add_set_cmd ("prompt-escape-char", class_support, var_zinteger, |
| 2036 | (char *) &gdb_prompt_escape, |
| 2037 | "Set escape character for formatting of gdb's prompt", |
| 2038 | &setlist), |
| 2039 | &showlist); |
| 2040 | |
| 2041 | add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ |
| 2042 | Primarily used inside of user-defined commands that should not be repeated when\n\ |
| 2043 | hitting return."); |
| 2044 | |
| 2045 | /* The set editing command is different depending whether or not the |
| 2046 | async version is run. NOTE: this difference is going to disappear |
| 2047 | as we make the event loop be the default engine of gdb. */ |
| 2048 | if (!event_loop_p) |
| 2049 | { |
| 2050 | add_show_from_set |
| 2051 | (add_set_cmd ("editing", class_support, var_boolean, (char *) &command_editing_p, |
| 2052 | "Set editing of command lines as they are typed.\n\ |
| 2053 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
| 2054 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 2055 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), |
| 2056 | &showlist); |
| 2057 | } |
| 2058 | else |
| 2059 | { |
| 2060 | c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p, |
| 2061 | "Set editing of command lines as they are typed.\n\ |
| 2062 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
| 2063 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 2064 | EMACS-like or VI-like commands like control-P or ESC.", &setlist); |
| 2065 | |
| 2066 | add_show_from_set (c, &showlist); |
| 2067 | c->function.sfunc = set_async_editing_command; |
| 2068 | } |
| 2069 | |
| 2070 | add_show_from_set |
| 2071 | (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p, |
| 2072 | "Set saving of the history record on exit.\n\ |
| 2073 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
| 2074 | Without an argument, saving is enabled.", &sethistlist), |
| 2075 | &showhistlist); |
| 2076 | |
| 2077 | c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size, |
| 2078 | "Set the size of the command history, \n\ |
| 2079 | ie. the number of previous commands to keep a record of.", &sethistlist); |
| 2080 | add_show_from_set (c, &showhistlist); |
| 2081 | c->function.sfunc = set_history_size_command; |
| 2082 | |
| 2083 | add_show_from_set |
| 2084 | (add_set_cmd ("filename", no_class, var_filename, (char *) &history_filename, |
| 2085 | "Set the filename in which to record the command history\n\ |
| 2086 | (the list of previous commands of which a record is kept).", &sethistlist), |
| 2087 | &showhistlist); |
| 2088 | |
| 2089 | add_show_from_set |
| 2090 | (add_set_cmd ("confirm", class_support, var_boolean, |
| 2091 | (char *) &caution, |
| 2092 | "Set whether to confirm potentially dangerous operations.", |
| 2093 | &setlist), |
| 2094 | &showlist); |
| 2095 | |
| 2096 | /* The set annotate command is different depending whether or not |
| 2097 | the async version is run. NOTE: this difference is going to |
| 2098 | disappear as we make the event loop be the default engine of |
| 2099 | gdb. */ |
| 2100 | if (!event_loop_p) |
| 2101 | { |
| 2102 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
| 2103 | (char *) &annotation_level, "Set annotation_level.\n\ |
| 2104 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
| 2105 | 2 == output annotated suitably for use by programs that control GDB.", |
| 2106 | &setlist); |
| 2107 | c = add_show_from_set (c, &showlist); |
| 2108 | } |
| 2109 | else |
| 2110 | { |
| 2111 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
| 2112 | (char *) &annotation_level, "Set annotation_level.\n\ |
| 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 | &setlist); |
| 2116 | add_show_from_set (c, &showlist); |
| 2117 | c->function.sfunc = set_async_annotation_level; |
| 2118 | } |
| 2119 | if (event_loop_p) |
| 2120 | { |
| 2121 | add_show_from_set |
| 2122 | (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p, |
| 2123 | "Set notification of completion for asynchronous execution commands.\n\ |
| 2124 | Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), |
| 2125 | &showlist); |
| 2126 | } |
| 2127 | } |