Commit | Line | Data |
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c906108c | 1 | /* Top level stuff for GDB, the GNU debugger. |
d9fcf2fb | 2 | Copyright 1986-2000 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
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. | |
c906108c | 10 | |
c5aa993b JM |
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. | |
c906108c | 15 | |
c5aa993b JM |
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. */ | |
c906108c SS |
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" | |
c5aa993b | 33 | #include "terminal.h" /* For job_control. */ |
c906108c | 34 | #include "annotate.h" |
c906108c | 35 | #include "top.h" |
d4f3574e | 36 | #include "version.h" |
c906108c SS |
37 | |
38 | /* readline include files */ | |
39 | #include <readline/readline.h> | |
40 | #include <readline/history.h> | |
41 | ||
42 | /* readline defines this. */ | |
43 | #undef savestring | |
44 | ||
45 | #include <sys/types.h> | |
c906108c | 46 | |
c4093a6a | 47 | #include <setjmp.h> |
2acceee2 | 48 | |
c2c6d25f | 49 | #include "event-top.h" |
c906108c SS |
50 | #include "gdb_string.h" |
51 | #include "gdb_stat.h" | |
52 | #include <ctype.h> | |
8b93c638 JM |
53 | #ifdef UI_OUT |
54 | #include "ui-out.h" | |
55 | #include "cli-out.h" | |
56 | #endif | |
c906108c | 57 | |
c906108c SS |
58 | /* Prototypes for local functions */ |
59 | ||
a14ed312 | 60 | static void dont_repeat_command (char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void source_cleanup_lines (PTR); |
c906108c | 63 | |
a14ed312 | 64 | static void user_defined_command (char *, int); |
c906108c | 65 | |
a14ed312 | 66 | static void init_signals (void); |
c906108c SS |
67 | |
68 | #ifdef STOP_SIGNAL | |
a14ed312 | 69 | static void stop_sig (int); |
c906108c SS |
70 | #endif |
71 | ||
a14ed312 | 72 | static char *line_completion_function (char *, int, char *, int); |
c906108c | 73 | |
a14ed312 | 74 | static char *readline_line_completion_function (char *, int); |
c906108c | 75 | |
392a587b | 76 | /* NOTE 1999-04-29: this function will be static again, after we make the |
cd0fc7c3 SS |
77 | event loop be the default command loop for gdb, and we merge |
78 | event-top.c into this file, top.c */ | |
e41a3b1a | 79 | /* static */ void command_loop_marker (void *); |
cd0fc7c3 | 80 | |
a14ed312 | 81 | static void while_command (char *, int); |
c906108c | 82 | |
a14ed312 | 83 | static void if_command (char *, int); |
c906108c | 84 | |
a14ed312 KB |
85 | static struct command_line *build_command_line (enum command_control_type, |
86 | char *); | |
c906108c | 87 | |
a14ed312 KB |
88 | static struct command_line *get_command_line (enum command_control_type, |
89 | char *); | |
c906108c | 90 | |
a14ed312 | 91 | static void realloc_body_list (struct command_line *, int); |
c906108c | 92 | |
a14ed312 | 93 | static enum misc_command_type read_next_line (struct command_line **); |
c906108c SS |
94 | |
95 | static enum command_control_type | |
a14ed312 | 96 | recurse_read_control_structure (struct command_line *); |
c906108c | 97 | |
a14ed312 | 98 | static struct cleanup *setup_user_args (char *); |
c906108c | 99 | |
a14ed312 | 100 | static char *locate_arg (char *); |
c906108c | 101 | |
a14ed312 | 102 | static char *insert_args (char *); |
c906108c | 103 | |
e41a3b1a | 104 | static void arg_cleanup (void *); |
c906108c | 105 | |
a14ed312 | 106 | static void init_main (void); |
c906108c | 107 | |
a14ed312 | 108 | static void init_cmd_lists (void); |
c906108c | 109 | |
a14ed312 | 110 | static void float_handler (int); |
c906108c | 111 | |
a14ed312 | 112 | static void init_signals (void); |
c906108c | 113 | |
a14ed312 | 114 | static void set_verbose (char *, int, struct cmd_list_element *); |
c906108c | 115 | |
a14ed312 | 116 | static void show_history (char *, int); |
c906108c | 117 | |
a14ed312 | 118 | static void set_history (char *, int); |
c906108c | 119 | |
a14ed312 | 120 | static void set_history_size_command (char *, int, struct cmd_list_element *); |
c906108c | 121 | |
a14ed312 | 122 | static void show_commands (char *, int); |
c906108c | 123 | |
a14ed312 | 124 | static void echo_command (char *, int); |
c906108c | 125 | |
a14ed312 | 126 | static void pwd_command (char *, int); |
c906108c | 127 | |
a14ed312 | 128 | static void show_version (char *, int); |
c906108c | 129 | |
a14ed312 | 130 | static void document_command (char *, int); |
c906108c | 131 | |
a14ed312 | 132 | static void define_command (char *, int); |
c906108c | 133 | |
a14ed312 | 134 | static void validate_comname (char *); |
c906108c | 135 | |
a14ed312 | 136 | static void help_command (char *, int); |
c906108c | 137 | |
a14ed312 | 138 | static void show_command (char *, int); |
c906108c | 139 | |
a14ed312 | 140 | static void info_command (char *, int); |
c906108c | 141 | |
a14ed312 | 142 | static void complete_command (char *, int); |
c906108c | 143 | |
a14ed312 | 144 | static void do_nothing (int); |
c906108c | 145 | |
a14ed312 | 146 | static void show_debug (char *, int); |
5d161b24 | 147 | |
a14ed312 | 148 | static void set_debug (char *, int); |
5d161b24 | 149 | |
c906108c | 150 | #ifdef SIGHUP |
392a587b | 151 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
152 | gdb to use the event loop as the default command loop and we merge |
153 | event-top.c into this file, top.c */ | |
a14ed312 | 154 | /* static */ int quit_cover (PTR); |
c906108c | 155 | |
a14ed312 | 156 | static void disconnect (int); |
c906108c SS |
157 | #endif |
158 | ||
e41a3b1a AC |
159 | static void do_restore_instream_cleanup (void *stream); |
160 | ||
161 | static struct cleanup *make_cleanup_free_command_lines (struct command_line **); | |
c906108c | 162 | |
104c1213 JM |
163 | /* Default command line prompt. This is overriden in some configs. */ |
164 | ||
165 | #ifndef DEFAULT_PROMPT | |
166 | #define DEFAULT_PROMPT "(gdb) " | |
c906108c SS |
167 | #endif |
168 | ||
169 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
170 | ||
171 | #ifndef GDBINIT_FILENAME | |
172 | #define GDBINIT_FILENAME ".gdbinit" | |
173 | #endif | |
174 | char gdbinit[] = GDBINIT_FILENAME; | |
175 | ||
176 | int inhibit_gdbinit = 0; | |
177 | ||
178 | /* If nonzero, and GDB has been configured to be able to use windows, | |
179 | attempt to open them upon startup. */ | |
180 | ||
181 | int use_windows = 1; | |
182 | ||
c906108c SS |
183 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
184 | ||
185 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
186 | ||
c5aa993b | 187 | int caution = 1; /* Default is yes, sigh. */ |
c906108c SS |
188 | |
189 | /* Define all cmd_list_elements. */ | |
190 | ||
191 | /* Chain containing all defined commands. */ | |
192 | ||
193 | struct cmd_list_element *cmdlist; | |
194 | ||
195 | /* Chain containing all defined info subcommands. */ | |
196 | ||
197 | struct cmd_list_element *infolist; | |
198 | ||
199 | /* Chain containing all defined enable subcommands. */ | |
200 | ||
201 | struct cmd_list_element *enablelist; | |
202 | ||
203 | /* Chain containing all defined disable subcommands. */ | |
204 | ||
205 | struct cmd_list_element *disablelist; | |
206 | ||
207 | /* Chain containing all defined toggle subcommands. */ | |
208 | ||
209 | struct cmd_list_element *togglelist; | |
210 | ||
211 | /* Chain containing all defined stop subcommands. */ | |
212 | ||
213 | struct cmd_list_element *stoplist; | |
214 | ||
215 | /* Chain containing all defined delete subcommands. */ | |
216 | ||
217 | struct cmd_list_element *deletelist; | |
218 | ||
219 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
220 | ||
221 | struct cmd_list_element *enablebreaklist; | |
222 | ||
223 | /* Chain containing all defined set subcommands */ | |
224 | ||
225 | struct cmd_list_element *setlist; | |
226 | ||
227 | /* Chain containing all defined unset subcommands */ | |
228 | ||
229 | struct cmd_list_element *unsetlist; | |
230 | ||
231 | /* Chain containing all defined show subcommands. */ | |
232 | ||
233 | struct cmd_list_element *showlist; | |
234 | ||
235 | /* Chain containing all defined \"set history\". */ | |
236 | ||
237 | struct cmd_list_element *sethistlist; | |
238 | ||
239 | /* Chain containing all defined \"show history\". */ | |
240 | ||
241 | struct cmd_list_element *showhistlist; | |
242 | ||
243 | /* Chain containing all defined \"unset history\". */ | |
244 | ||
245 | struct cmd_list_element *unsethistlist; | |
246 | ||
247 | /* Chain containing all defined maintenance subcommands. */ | |
248 | ||
c906108c | 249 | struct cmd_list_element *maintenancelist; |
c906108c SS |
250 | |
251 | /* Chain containing all defined "maintenance info" subcommands. */ | |
252 | ||
c906108c | 253 | struct cmd_list_element *maintenanceinfolist; |
c906108c SS |
254 | |
255 | /* Chain containing all defined "maintenance print" subcommands. */ | |
256 | ||
c906108c | 257 | struct cmd_list_element *maintenanceprintlist; |
c906108c SS |
258 | |
259 | struct cmd_list_element *setprintlist; | |
260 | ||
261 | struct cmd_list_element *showprintlist; | |
262 | ||
5d161b24 DB |
263 | struct cmd_list_element *setdebuglist; |
264 | ||
265 | struct cmd_list_element *showdebuglist; | |
266 | ||
c906108c SS |
267 | struct cmd_list_element *setchecklist; |
268 | ||
269 | struct cmd_list_element *showchecklist; | |
270 | ||
271 | /* stdio stream that command input is being read from. Set to stdin normally. | |
272 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
273 | executing a user-defined command or interacting via a GUI. */ | |
274 | ||
275 | FILE *instream; | |
276 | ||
277 | /* Current working directory. */ | |
278 | ||
279 | char *current_directory; | |
280 | ||
281 | /* The directory name is actually stored here (usually). */ | |
282 | char gdb_dirbuf[1024]; | |
283 | ||
284 | /* Function to call before reading a command, if nonzero. | |
285 | The function receives two args: an input stream, | |
286 | and a prompt string. */ | |
287 | ||
288 | void (*window_hook) PARAMS ((FILE *, char *)); | |
289 | ||
290 | int epoch_interface; | |
291 | int xgdb_verbose; | |
292 | ||
293 | /* gdb prints this when reading a command interactively */ | |
c5aa993b | 294 | static char *gdb_prompt_string; /* the global prompt string */ |
a14ed312 | 295 | extern char *get_prompt (void); /* access function for prompt string */ |
c906108c SS |
296 | |
297 | /* Buffer used for reading command lines, and the size | |
298 | allocated for it so far. */ | |
299 | ||
300 | char *line; | |
301 | int linesize = 100; | |
302 | ||
303 | /* Nonzero if the current command is modified by "server ". This | |
c2d11a7d | 304 | affects things like recording into the command history, commands |
c906108c SS |
305 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
306 | whatever) can issue its own commands and also send along commands | |
307 | from the user, and have the user not notice that the user interface | |
308 | is issuing commands too. */ | |
309 | int server_command; | |
310 | ||
311 | /* Baud rate specified for talking to serial target systems. Default | |
312 | is left as -1, so targets can choose their own defaults. */ | |
313 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
314 | or (unsigned int)-1. This is a Bad User Interface. */ | |
315 | ||
316 | int baud_rate = -1; | |
317 | ||
318 | /* Timeout limit for response from target. */ | |
319 | ||
ce808e91 AC |
320 | /* The default value has been changed many times over the years. It |
321 | was originally 5 seconds. But that was thought to be a long time | |
322 | to sit and wait, so it was changed to 2 seconds. That was thought | |
323 | to be plenty unless the connection was going through some terminal | |
324 | server or multiplexer or other form of hairy serial connection. | |
325 | ||
326 | In mid-1996, remote_timeout was moved from remote.c to top.c and | |
327 | it began being used in other remote-* targets. It appears that the | |
328 | default was changed to 20 seconds at that time, perhaps because the | |
329 | Hitachi E7000 ICE didn't always respond in a timely manner. | |
330 | ||
331 | But if 5 seconds is a long time to sit and wait for retransmissions, | |
332 | 20 seconds is far worse. This demonstrates the difficulty of using | |
333 | a single variable for all protocol timeouts. | |
334 | ||
335 | As remote.c is used much more than remote-e7000.c, it was changed | |
336 | back to 2 seconds in 1999. */ | |
337 | ||
338 | int remote_timeout = 2; | |
c906108c SS |
339 | |
340 | /* Non-zero tells remote* modules to output debugging info. */ | |
341 | ||
342 | int remote_debug = 0; | |
343 | ||
43ff13b4 JM |
344 | /* Non-zero means the target is running. Note: this is different from |
345 | saying that there is an active target and we are stopped at a | |
346 | breakpoint, for instance. This is a real indicator whether the | |
347 | target is off and running, which gdb is doing something else. */ | |
348 | int target_executing = 0; | |
349 | ||
c906108c SS |
350 | /* Level of control structure. */ |
351 | static int control_level; | |
352 | ||
353 | /* Structure for arguments to user defined functions. */ | |
354 | #define MAXUSERARGS 10 | |
355 | struct user_args | |
c5aa993b JM |
356 | { |
357 | struct user_args *next; | |
358 | struct | |
359 | { | |
360 | char *arg; | |
361 | int len; | |
362 | } | |
363 | a[MAXUSERARGS]; | |
364 | int count; | |
365 | } | |
366 | *user_args; | |
c906108c SS |
367 | |
368 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ | |
369 | ||
370 | #ifndef STOP_SIGNAL | |
371 | #ifdef SIGTSTP | |
372 | #define STOP_SIGNAL SIGTSTP | |
a14ed312 | 373 | static void stop_sig (int); |
c906108c SS |
374 | #endif |
375 | #endif | |
376 | ||
377 | /* Some System V have job control but not sigsetmask(). */ | |
378 | #if !defined (HAVE_SIGSETMASK) | |
379 | #if !defined (USG) | |
380 | #define HAVE_SIGSETMASK 1 | |
381 | #else | |
382 | #define HAVE_SIGSETMASK 0 | |
383 | #endif | |
384 | #endif | |
385 | ||
386 | #if 0 == (HAVE_SIGSETMASK) | |
387 | #define sigsetmask(n) | |
388 | #endif | |
389 | ||
390 | /* Hooks for alternate command interfaces. */ | |
391 | ||
392 | /* Called after most modules have been initialized, but before taking users | |
393 | command file. */ | |
394 | ||
395 | void (*init_ui_hook) PARAMS ((char *argv0)); | |
7a292a7a SS |
396 | |
397 | /* This hook is called from within gdb's many mini-event loops which could | |
398 | steal control from a real user interface's event loop. It returns | |
399 | non-zero if the user is requesting a detach, zero otherwise. */ | |
400 | ||
401 | int (*ui_loop_hook) PARAMS ((int)); | |
c906108c SS |
402 | |
403 | /* Called instead of command_loop at top level. Can be invoked via | |
404 | return_to_top_level. */ | |
405 | ||
406 | void (*command_loop_hook) PARAMS ((void)); | |
407 | ||
408 | ||
c906108c SS |
409 | /* Called from print_frame_info to list the line we stopped in. */ |
410 | ||
c5aa993b | 411 | void (*print_frame_info_listing_hook) PARAMS ((struct symtab * s, int line, |
c906108c SS |
412 | int stopline, int noerror)); |
413 | /* Replaces most of query. */ | |
414 | ||
415 | int (*query_hook) PARAMS ((const char *, va_list)); | |
416 | ||
417 | /* Replaces most of warning. */ | |
418 | ||
419 | void (*warning_hook) PARAMS ((const char *, va_list)); | |
420 | ||
c906108c SS |
421 | /* These three functions support getting lines of text from the user. They |
422 | are used in sequence. First readline_begin_hook is called with a text | |
423 | string that might be (for example) a message for the user to type in a | |
424 | sequence of commands to be executed at a breakpoint. If this function | |
425 | calls back to a GUI, it might take this opportunity to pop up a text | |
426 | interaction window with this message. Next, readline_hook is called | |
427 | with a prompt that is emitted prior to collecting the user input. | |
428 | It can be called multiple times. Finally, readline_end_hook is called | |
429 | to notify the GUI that we are done with the interaction window and it | |
430 | can close it. */ | |
431 | ||
c5aa993b JM |
432 | void (*readline_begin_hook) PARAMS ((char *,...)); |
433 | char *(*readline_hook) PARAMS ((char *)); | |
c906108c SS |
434 | void (*readline_end_hook) PARAMS ((void)); |
435 | ||
436 | /* Called as appropriate to notify the interface of the specified breakpoint | |
437 | conditions. */ | |
438 | ||
c5aa993b JM |
439 | void (*create_breakpoint_hook) PARAMS ((struct breakpoint * bpt)); |
440 | void (*delete_breakpoint_hook) PARAMS ((struct breakpoint * bpt)); | |
441 | void (*modify_breakpoint_hook) PARAMS ((struct breakpoint * bpt)); | |
c906108c | 442 | |
6426a772 JM |
443 | /* Called as appropriate to notify the interface that we have attached |
444 | to or detached from an already running process. */ | |
445 | ||
446 | void (*attach_hook) PARAMS ((void)); | |
447 | void (*detach_hook) PARAMS ((void)); | |
448 | ||
c906108c SS |
449 | /* Called during long calculations to allow GUI to repair window damage, and to |
450 | check for stop buttons, etc... */ | |
451 | ||
452 | void (*interactive_hook) PARAMS ((void)); | |
453 | ||
454 | /* Called when the registers have changed, as a hint to a GUI | |
455 | to minimize window update. */ | |
456 | ||
457 | void (*registers_changed_hook) PARAMS ((void)); | |
458 | ||
459 | /* Tell the GUI someone changed the register REGNO. -1 means | |
460 | that the caller does not know which register changed or | |
c5aa993b | 461 | that several registers have changed (see value_assign). */ |
c906108c SS |
462 | void (*register_changed_hook) PARAMS ((int regno)); |
463 | ||
464 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ | |
465 | void (*memory_changed_hook) PARAMS ((CORE_ADDR addr, int len)); | |
466 | ||
467 | /* Called when going to wait for the target. Usually allows the GUI to run | |
468 | while waiting for target events. */ | |
469 | ||
c5aa993b | 470 | int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus * status)); |
c906108c SS |
471 | |
472 | /* Used by UI as a wrapper around command execution. May do various things | |
473 | like enabling/disabling buttons, etc... */ | |
474 | ||
c5aa993b | 475 | void (*call_command_hook) PARAMS ((struct cmd_list_element * c, char *cmd, |
c906108c SS |
476 | int from_tty)); |
477 | ||
96baa820 JM |
478 | /* Called after a `set' command has finished. Is only run if the |
479 | `set' command succeeded. */ | |
480 | ||
eb2f494a | 481 | void (*set_hook) (struct cmd_list_element * c); |
96baa820 | 482 | |
c906108c SS |
483 | /* Called when the current thread changes. Argument is thread id. */ |
484 | ||
485 | void (*context_hook) PARAMS ((int id)); | |
486 | ||
487 | /* Takes control from error (). Typically used to prevent longjmps out of the | |
488 | middle of the GUI. Usually used in conjunction with a catch routine. */ | |
489 | ||
eb2f494a | 490 | NORETURN void (*error_hook) (void) ATTR_NORETURN; |
c906108c | 491 | \f |
c5aa993b | 492 | |
99eeeb0f ND |
493 | /* One should use catch_errors rather than manipulating these |
494 | directly. */ | |
c4093a6a JM |
495 | #if defined(HAVE_SIGSETJMP) |
496 | #define SIGJMP_BUF sigjmp_buf | |
497 | #define SIGSETJMP(buf) sigsetjmp(buf, 1) | |
498 | #define SIGLONGJMP(buf,val) siglongjmp(buf,val) | |
499 | #else | |
500 | #define SIGJMP_BUF jmp_buf | |
501 | #define SIGSETJMP(buf) setjmp(buf) | |
502 | #define SIGLONGJMP(buf,val) longjmp(buf,val) | |
503 | #endif | |
504 | ||
99eeeb0f ND |
505 | /* Where to go for return_to_top_level. */ |
506 | static SIGJMP_BUF *catch_return; | |
c906108c | 507 | |
99eeeb0f | 508 | /* Return for reason REASON to the nearest containing catch_errors(). */ |
c906108c | 509 | |
c2d11a7d | 510 | NORETURN void |
6426a772 | 511 | return_to_top_level (reason) |
c906108c SS |
512 | enum return_reason reason; |
513 | { | |
514 | quit_flag = 0; | |
515 | immediate_quit = 0; | |
516 | ||
517 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure | |
518 | I can think of a reason why that is vital, though). */ | |
c5aa993b | 519 | bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */ |
c906108c SS |
520 | |
521 | disable_current_display (); | |
522 | do_cleanups (ALL_CLEANUPS); | |
c4093a6a | 523 | if (event_loop_p && target_can_async_p () && !target_executing) |
43ff13b4 | 524 | do_exec_cleanups (ALL_CLEANUPS); |
6426a772 JM |
525 | if (event_loop_p && sync_execution) |
526 | do_exec_error_cleanups (ALL_CLEANUPS); | |
c906108c SS |
527 | |
528 | if (annotation_level > 1) | |
529 | switch (reason) | |
530 | { | |
531 | case RETURN_QUIT: | |
532 | annotate_quit (); | |
533 | break; | |
534 | case RETURN_ERROR: | |
535 | annotate_error (); | |
536 | break; | |
537 | } | |
538 | ||
99eeeb0f ND |
539 | /* Jump to the containing catch_errors() call, communicating REASON |
540 | to that call via setjmp's return value. Note that REASON can't | |
541 | be zero, by definition in defs.h. */ | |
542 | ||
eb2f494a | 543 | (NORETURN void) SIGLONGJMP (*catch_return, (int) reason); |
c906108c SS |
544 | } |
545 | ||
546 | /* Call FUNC with arg ARGS, catching any errors. If there is no | |
547 | error, return the value returned by FUNC. If there is an error, | |
548 | print ERRSTRING, print the specific error message, then return | |
549 | zero. | |
550 | ||
551 | Must not be called with immediate_quit in effect (bad things might | |
552 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
553 | This is an OK restriction; with very few exceptions immediate_quit can | |
554 | be replaced by judicious use of QUIT. | |
555 | ||
556 | MASK specifies what to catch; it is normally set to | |
557 | RETURN_MASK_ALL, if for no other reason than that the code which | |
558 | calls catch_errors might not be set up to deal with a quit which | |
559 | isn't caught. But if the code can deal with it, it generally | |
560 | should be RETURN_MASK_ERROR, unless for some reason it is more | |
561 | useful to abort only the portion of the operation inside the | |
562 | catch_errors. Note that quit should return to the command line | |
563 | fairly quickly, even if some further processing is being done. */ | |
564 | ||
11cf8741 JM |
565 | /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with |
566 | error() et.al. could maintain a set of flags that indicate the the | |
567 | current state of each of the longjmp buffers. This would give the | |
568 | longjmp code the chance to detect a longjmp botch (before it gets | |
569 | to longjmperror()). Prior to 1999-11-05 this wasn't possible as | |
570 | code also randomly used a SET_TOP_LEVEL macro that directly | |
571 | initialize the longjmp buffers. */ | |
572 | ||
11cf8741 JM |
573 | /* MAYBE: cagney/1999-11-05: Should the catch_erros and cleanups code |
574 | be consolidated into a single file instead of being distributed | |
575 | between utils.c and top.c? */ | |
576 | ||
c906108c SS |
577 | int |
578 | catch_errors (func, args, errstring, mask) | |
579 | catch_errors_ftype *func; | |
580 | PTR args; | |
581 | char *errstring; | |
582 | return_mask mask; | |
583 | { | |
99eeeb0f ND |
584 | SIGJMP_BUF *saved_catch; |
585 | SIGJMP_BUF catch; | |
c906108c SS |
586 | int val; |
587 | struct cleanup *saved_cleanup_chain; | |
588 | char *saved_error_pre_print; | |
589 | char *saved_quit_pre_print; | |
590 | ||
99eeeb0f ND |
591 | /* Return value from SIGSETJMP(): enum return_reason if error or |
592 | quit caught, 0 otherwise. */ | |
593 | int caught; | |
594 | ||
595 | /* Override error/quit messages during FUNC. */ | |
596 | ||
c906108c SS |
597 | saved_error_pre_print = error_pre_print; |
598 | saved_quit_pre_print = quit_pre_print; | |
599 | ||
600 | if (mask & RETURN_MASK_ERROR) | |
99eeeb0f | 601 | error_pre_print = errstring; |
c906108c | 602 | if (mask & RETURN_MASK_QUIT) |
99eeeb0f ND |
603 | quit_pre_print = errstring; |
604 | ||
605 | /* Prevent error/quit during FUNC from calling cleanups established | |
606 | prior to here. */ | |
607 | ||
608 | saved_cleanup_chain = save_cleanups (); | |
609 | ||
610 | /* Call FUNC, catching error/quit events. */ | |
611 | ||
612 | saved_catch = catch_return; | |
613 | catch_return = &catch; | |
614 | caught = SIGSETJMP (catch); | |
615 | if (!caught) | |
616 | val = (*func) (args); | |
617 | catch_return = saved_catch; | |
618 | ||
619 | /* FIXME: cagney/1999-11-05: A correct FUNC implementaton will | |
620 | clean things up (restoring the cleanup chain) to the state they | |
621 | were just prior to the call. Unfortunatly, many FUNC's are not | |
622 | that well behaved. This could be fixed by adding either a | |
623 | do_cleanups call (to cover the problem) or an assertion check to | |
624 | detect bad FUNCs code. */ | |
625 | ||
626 | /* Restore the cleanup chain and error/quit messages to their | |
627 | original states. */ | |
c906108c SS |
628 | |
629 | restore_cleanups (saved_cleanup_chain); | |
630 | ||
c906108c | 631 | if (mask & RETURN_MASK_QUIT) |
99eeeb0f ND |
632 | quit_pre_print = saved_quit_pre_print; |
633 | if (mask & RETURN_MASK_ERROR) | |
634 | error_pre_print = saved_error_pre_print; | |
635 | ||
636 | /* Return normally if no error/quit event occurred. */ | |
637 | ||
638 | if (!caught) | |
639 | return val; | |
640 | ||
641 | /* If the caller didn't request that the event be caught, relay the | |
642 | event to the next containing catch_errors(). */ | |
643 | ||
644 | if (!(mask & RETURN_MASK (caught))) | |
645 | return_to_top_level (caught); | |
646 | ||
647 | /* Tell the caller that an event was caught. | |
648 | ||
649 | FIXME: nsd/2000-02-22: When MASK is RETURN_MASK_ALL, the caller | |
650 | can't tell what type of event occurred. | |
651 | ||
652 | A possible fix is to add a new interface, catch_event(), that | |
653 | returns enum return_reason after catching an error or a quit. | |
654 | ||
655 | When returning normally, i.e. without catching an error or a | |
656 | quit, catch_event() could return RETURN_NORMAL, which would be | |
657 | added to enum return_reason. FUNC would return information | |
658 | exclusively via ARGS. | |
659 | ||
660 | Alternatively, normal catch_event() could return FUNC's return | |
661 | value. The caller would need to be aware of potential overlap | |
662 | with enum return_reason, which could be publicly restricted to | |
663 | negative values to simplify return value processing in FUNC and | |
664 | in the caller. */ | |
665 | ||
666 | return 0; | |
c906108c SS |
667 | } |
668 | ||
11cf8741 JM |
669 | struct captured_command_args |
670 | { | |
671 | catch_command_errors_ftype *command; | |
672 | char *arg; | |
673 | int from_tty; | |
674 | }; | |
675 | ||
676 | static int | |
677 | do_captured_command (void *data) | |
678 | { | |
679 | struct captured_command_args *context = data; | |
680 | context->command (context->arg, context->from_tty); | |
681 | /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call | |
682 | isn't needed. Instead an assertion check could be made that | |
683 | simply confirmed that the called function correctly cleaned up | |
684 | after its self. Unfortunatly, old code (prior to 1999-11-04) in | |
685 | main.c was calling SET_TOP_LEVEL(), calling the command function, | |
686 | and then *always* calling do_cleanups(). For the moment we | |
687 | remain ``bug compatible'' with that old code.. */ | |
688 | do_cleanups (ALL_CLEANUPS); | |
689 | return 1; | |
690 | } | |
691 | ||
692 | int | |
eb2f494a | 693 | catch_command_errors (catch_command_errors_ftype * command, |
11cf8741 JM |
694 | char *arg, int from_tty, return_mask mask) |
695 | { | |
696 | struct captured_command_args args; | |
697 | args.command = command; | |
698 | args.arg = arg; | |
699 | args.from_tty = from_tty; | |
700 | return catch_errors (do_captured_command, &args, "", mask); | |
701 | } | |
702 | ||
703 | ||
c906108c SS |
704 | /* Handler for SIGHUP. */ |
705 | ||
706 | #ifdef SIGHUP | |
707 | static void | |
708 | disconnect (signo) | |
c5aa993b | 709 | int signo; |
c906108c SS |
710 | { |
711 | catch_errors (quit_cover, NULL, | |
c5aa993b | 712 | "Could not kill the program being debugged", RETURN_MASK_ALL); |
c906108c SS |
713 | signal (SIGHUP, SIG_DFL); |
714 | kill (getpid (), SIGHUP); | |
715 | } | |
716 | ||
717 | /* Just a little helper function for disconnect(). */ | |
718 | ||
392a587b | 719 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
720 | gdb to use the event loop as the default command loop and we merge |
721 | event-top.c into this file, top.c */ | |
722 | /* static */ int | |
c906108c SS |
723 | quit_cover (s) |
724 | PTR s; | |
725 | { | |
c5aa993b JM |
726 | caution = 0; /* Throw caution to the wind -- we're exiting. |
727 | This prevents asking the user dumb questions. */ | |
728 | quit_command ((char *) 0, 0); | |
c906108c SS |
729 | return 0; |
730 | } | |
731 | #endif /* defined SIGHUP */ | |
732 | \f | |
733 | /* Line number we are currently in in a file which is being sourced. */ | |
392a587b | 734 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
735 | gdb to use the event loop as the default command loop and we merge |
736 | event-top.c into this file, top.c */ | |
737 | /* static */ int source_line_number; | |
c906108c SS |
738 | |
739 | /* Name of the file we are sourcing. */ | |
392a587b | 740 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
741 | gdb to use the event loop as the default command loop and we merge |
742 | event-top.c into this file, top.c */ | |
743 | /* static */ char *source_file_name; | |
c906108c SS |
744 | |
745 | /* Buffer containing the error_pre_print used by the source stuff. | |
746 | Malloc'd. */ | |
392a587b | 747 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
748 | gdb to use the event loop as the default command loop and we merge |
749 | event-top.c into this file, top.c */ | |
750 | /* static */ char *source_error; | |
c906108c SS |
751 | static int source_error_allocated; |
752 | ||
753 | /* Something to glom on to the start of error_pre_print if source_file_name | |
754 | is set. */ | |
392a587b | 755 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
756 | gdb to use the event loop as the default command loop and we merge |
757 | event-top.c into this file, top.c */ | |
758 | /* static */ char *source_pre_error; | |
c906108c SS |
759 | |
760 | /* Clean up on error during a "source" command (or execution of a | |
761 | user-defined command). */ | |
762 | ||
763 | static void | |
e41a3b1a | 764 | do_restore_instream_cleanup (void *stream) |
c906108c SS |
765 | { |
766 | /* Restore the previous input stream. */ | |
767 | instream = stream; | |
768 | } | |
769 | ||
770 | /* Read commands from STREAM. */ | |
771 | void | |
772 | read_command_file (stream) | |
773 | FILE *stream; | |
774 | { | |
775 | struct cleanup *cleanups; | |
776 | ||
e41a3b1a | 777 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
c906108c | 778 | instream = stream; |
c5aa993b | 779 | command_loop (); |
c906108c SS |
780 | do_cleanups (cleanups); |
781 | } | |
782 | \f | |
a14ed312 | 783 | extern void init_proc (void); |
c906108c SS |
784 | |
785 | void (*pre_init_ui_hook) PARAMS ((void)); | |
786 | ||
e41a3b1a AC |
787 | #ifdef __MSDOS__ |
788 | void | |
789 | do_chdir_cleanup (void *old_dir) | |
790 | { | |
791 | chdir (old_dir); | |
792 | free (old_dir); | |
793 | } | |
794 | #endif | |
795 | ||
c906108c SS |
796 | void |
797 | gdb_init (argv0) | |
798 | char *argv0; | |
799 | { | |
800 | if (pre_init_ui_hook) | |
801 | pre_init_ui_hook (); | |
802 | ||
803 | /* Run the init function of each source file */ | |
804 | ||
805 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); | |
806 | current_directory = gdb_dirbuf; | |
807 | ||
a0b3c4fd JM |
808 | #ifdef __MSDOS__ |
809 | /* Make sure we return to the original directory upon exit, come | |
810 | what may, since the OS doesn't do that for us. */ | |
e41a3b1a | 811 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
a0b3c4fd JM |
812 | #endif |
813 | ||
c5aa993b JM |
814 | init_cmd_lists (); /* This needs to be done first */ |
815 | initialize_targets (); /* Setup target_terminal macros for utils.c */ | |
816 | initialize_utils (); /* Make errors and warnings possible */ | |
c906108c | 817 | initialize_all_files (); |
e514a9d6 | 818 | initialize_current_architecture (); |
c5aa993b | 819 | init_main (); /* But that omits this file! Do it now */ |
cd0fc7c3 SS |
820 | |
821 | /* The signal handling mechanism is different depending whether or | |
822 | not the async version is run. NOTE: in the future we plan to make | |
823 | the event loop be the default engine of gdb, and this difference | |
824 | will disappear. */ | |
6426a772 | 825 | if (event_loop_p) |
cd0fc7c3 SS |
826 | async_init_signals (); |
827 | else | |
c5aa993b | 828 | init_signals (); |
c906108c | 829 | |
c906108c SS |
830 | /* We need a default language for parsing expressions, so simple things like |
831 | "set width 0" won't fail if no language is explicitly set in a config file | |
832 | or implicitly set by reading an executable during startup. */ | |
833 | set_language (language_c); | |
c5aa993b | 834 | expected_language = current_language; /* don't warn about the change. */ |
c906108c | 835 | |
8b93c638 JM |
836 | #ifdef UI_OUT |
837 | /* Install the default UI */ | |
838 | uiout = cli_out_new (gdb_stdout); | |
839 | #endif | |
fb40c209 AC |
840 | |
841 | #ifdef UI_OUT | |
842 | /* All the interpreters should have had a look at things by now. | |
843 | Initialize the selected interpreter. */ | |
844 | if (interpreter_p && !init_ui_hook) | |
845 | { | |
846 | fprintf_unfiltered (gdb_stderr, "Interpreter `%s' unrecognized.\n", | |
847 | interpreter_p); | |
848 | exit (1); | |
849 | } | |
850 | #endif | |
8b93c638 | 851 | |
c906108c SS |
852 | if (init_ui_hook) |
853 | init_ui_hook (argv0); | |
854 | } | |
855 | ||
856 | /* Allocate, initialize a new command line structure for one of the | |
857 | control commands (if/while). */ | |
858 | ||
859 | static struct command_line * | |
860 | build_command_line (type, args) | |
861 | enum command_control_type type; | |
862 | char *args; | |
863 | { | |
864 | struct command_line *cmd; | |
865 | ||
866 | if (args == NULL) | |
867 | error ("if/while commands require arguments.\n"); | |
868 | ||
c5aa993b | 869 | cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); |
c906108c SS |
870 | cmd->next = NULL; |
871 | cmd->control_type = type; | |
872 | ||
873 | cmd->body_count = 1; | |
874 | cmd->body_list | |
c5aa993b JM |
875 | = (struct command_line **) xmalloc (sizeof (struct command_line *) |
876 | * cmd->body_count); | |
c906108c SS |
877 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); |
878 | cmd->line = savestring (args, strlen (args)); | |
879 | return cmd; | |
880 | } | |
881 | ||
882 | /* Build and return a new command structure for the control commands | |
883 | such as "if" and "while". */ | |
884 | ||
885 | static struct command_line * | |
886 | get_command_line (type, arg) | |
887 | enum command_control_type type; | |
888 | char *arg; | |
889 | { | |
890 | struct command_line *cmd; | |
891 | struct cleanup *old_chain = NULL; | |
892 | ||
893 | /* Allocate and build a new command line structure. */ | |
894 | cmd = build_command_line (type, arg); | |
895 | ||
e41a3b1a | 896 | old_chain = make_cleanup_free_command_lines (&cmd); |
c906108c SS |
897 | |
898 | /* Read in the body of this command. */ | |
899 | if (recurse_read_control_structure (cmd) == invalid_control) | |
900 | { | |
901 | warning ("error reading in control structure\n"); | |
902 | do_cleanups (old_chain); | |
903 | return NULL; | |
904 | } | |
905 | ||
906 | discard_cleanups (old_chain); | |
907 | return cmd; | |
908 | } | |
909 | ||
910 | /* Recursively print a command (including full control structures). */ | |
8b93c638 JM |
911 | #ifdef UI_OUT |
912 | void | |
913 | print_command_lines (uiout, cmd, depth) | |
914 | struct ui_out *uiout; | |
915 | struct command_line *cmd; | |
916 | unsigned int depth; | |
917 | { | |
918 | struct command_line *list; | |
919 | ||
920 | list = cmd; | |
921 | while (list) | |
922 | { | |
923 | ||
924 | if (depth) | |
925 | ui_out_spaces (uiout, 2 * depth); | |
926 | ||
927 | /* A simple command, print it and continue. */ | |
928 | if (list->control_type == simple_control) | |
929 | { | |
930 | ui_out_field_string (uiout, NULL, list->line); | |
931 | ui_out_text (uiout, "\n"); | |
932 | list = list->next; | |
933 | continue; | |
934 | } | |
935 | ||
936 | /* loop_continue to jump to the start of a while loop, print it | |
937 | and continue. */ | |
938 | if (list->control_type == continue_control) | |
939 | { | |
940 | ui_out_field_string (uiout, NULL, "loop_continue"); | |
941 | ui_out_text (uiout, "\n"); | |
942 | list = list->next; | |
943 | continue; | |
944 | } | |
945 | ||
946 | /* loop_break to break out of a while loop, print it and continue. */ | |
947 | if (list->control_type == break_control) | |
948 | { | |
949 | ui_out_field_string (uiout, NULL, "loop_break"); | |
950 | ui_out_text (uiout, "\n"); | |
951 | list = list->next; | |
952 | continue; | |
953 | } | |
954 | ||
955 | /* A while command. Recursively print its subcommands and continue. */ | |
956 | if (list->control_type == while_control) | |
957 | { | |
958 | ui_out_text (uiout, "while "); | |
959 | ui_out_field_fmt (uiout, NULL, "while %s", list->line); | |
960 | ui_out_text (uiout, "\n"); | |
961 | print_command_lines (uiout, *list->body_list, depth + 1); | |
962 | ui_out_field_string (uiout, NULL, "end"); | |
963 | if (depth) | |
964 | ui_out_spaces (uiout, 2 * depth); | |
965 | ui_out_text (uiout, "end\n"); | |
966 | list = list->next; | |
967 | continue; | |
968 | } | |
969 | ||
970 | /* An if command. Recursively print both arms before continueing. */ | |
971 | if (list->control_type == if_control) | |
972 | { | |
973 | ui_out_text (uiout, "if "); | |
974 | ui_out_field_fmt (uiout, NULL, "if %s", list->line); | |
975 | ui_out_text (uiout, "\n"); | |
976 | /* The true arm. */ | |
977 | print_command_lines (uiout, list->body_list[0], depth + 1); | |
978 | ||
979 | /* Show the false arm if it exists. */ | |
980 | if (list->body_count == 2) | |
981 | { | |
982 | if (depth) | |
983 | ui_out_spaces (uiout, 2 * depth); | |
984 | ui_out_field_string (uiout, NULL, "else"); | |
985 | ui_out_text (uiout, "else\n"); | |
986 | print_command_lines (uiout, list->body_list[1], depth + 1); | |
987 | } | |
988 | ||
989 | ui_out_field_string (uiout, NULL, "end"); | |
990 | if (depth) | |
991 | ui_out_spaces (uiout, 2 * depth); | |
992 | ui_out_text (uiout, "end\n"); | |
993 | list = list->next; | |
994 | continue; | |
995 | } | |
996 | ||
997 | /* ignore illegal command type and try next */ | |
998 | list = list->next; | |
999 | } /* while (list) */ | |
1000 | } | |
1001 | #else | |
c906108c | 1002 | void |
9e086581 | 1003 | print_command_line (cmd, depth, stream) |
c906108c SS |
1004 | struct command_line *cmd; |
1005 | unsigned int depth; | |
d9fcf2fb | 1006 | struct ui_file *stream; |
c906108c SS |
1007 | { |
1008 | unsigned int i; | |
1009 | ||
1010 | if (depth) | |
1011 | { | |
1012 | for (i = 0; i < depth; i++) | |
9e086581 | 1013 | fputs_filtered (" ", stream); |
c906108c SS |
1014 | } |
1015 | ||
1016 | /* A simple command, print it and return. */ | |
1017 | if (cmd->control_type == simple_control) | |
1018 | { | |
9e086581 JM |
1019 | fputs_filtered (cmd->line, stream); |
1020 | fputs_filtered ("\n", stream); | |
c906108c SS |
1021 | return; |
1022 | } | |
1023 | ||
1024 | /* loop_continue to jump to the start of a while loop, print it | |
1025 | and return. */ | |
1026 | if (cmd->control_type == continue_control) | |
1027 | { | |
9e086581 | 1028 | fputs_filtered ("loop_continue\n", stream); |
c906108c SS |
1029 | return; |
1030 | } | |
1031 | ||
1032 | /* loop_break to break out of a while loop, print it and return. */ | |
1033 | if (cmd->control_type == break_control) | |
1034 | { | |
9e086581 | 1035 | fputs_filtered ("loop_break\n", stream); |
c906108c SS |
1036 | return; |
1037 | } | |
1038 | ||
1039 | /* A while command. Recursively print its subcommands before returning. */ | |
1040 | if (cmd->control_type == while_control) | |
1041 | { | |
1042 | struct command_line *list; | |
9e086581 JM |
1043 | fputs_filtered ("while ", stream); |
1044 | fputs_filtered (cmd->line, stream); | |
1045 | fputs_filtered ("\n", stream); | |
c906108c SS |
1046 | list = *cmd->body_list; |
1047 | while (list) | |
1048 | { | |
9e086581 | 1049 | print_command_line (list, depth + 1, stream); |
c906108c SS |
1050 | list = list->next; |
1051 | } | |
1052 | } | |
1053 | ||
1054 | /* An if command. Recursively print both arms before returning. */ | |
1055 | if (cmd->control_type == if_control) | |
1056 | { | |
9e086581 JM |
1057 | fputs_filtered ("if ", stream); |
1058 | fputs_filtered (cmd->line, stream); | |
1059 | fputs_filtered ("\n", stream); | |
c906108c | 1060 | /* The true arm. */ |
9e086581 | 1061 | print_command_line (cmd->body_list[0], depth + 1, stream); |
c906108c SS |
1062 | |
1063 | /* Show the false arm if it exists. */ | |
1064 | if (cmd->body_count == 2) | |
c5aa993b JM |
1065 | { |
1066 | if (depth) | |
1067 | { | |
1068 | for (i = 0; i < depth; i++) | |
1069 | fputs_filtered (" ", stream); | |
1070 | } | |
1071 | fputs_filtered ("else\n", stream); | |
1072 | print_command_line (cmd->body_list[1], depth + 1, stream); | |
1073 | } | |
c906108c SS |
1074 | if (depth) |
1075 | { | |
1076 | for (i = 0; i < depth; i++) | |
9e086581 | 1077 | fputs_filtered (" ", stream); |
c906108c | 1078 | } |
9e086581 | 1079 | fputs_filtered ("end\n", stream); |
c906108c SS |
1080 | } |
1081 | } | |
8b93c638 | 1082 | #endif |
c906108c SS |
1083 | |
1084 | /* Execute the command in CMD. */ | |
1085 | ||
1086 | enum command_control_type | |
1087 | execute_control_command (cmd) | |
1088 | struct command_line *cmd; | |
1089 | { | |
1090 | struct expression *expr; | |
1091 | struct command_line *current; | |
1092 | struct cleanup *old_chain = 0; | |
1093 | value_ptr val; | |
1094 | value_ptr val_mark; | |
1095 | int loop; | |
1096 | enum command_control_type ret; | |
1097 | char *new_line; | |
1098 | ||
1099 | switch (cmd->control_type) | |
1100 | { | |
1101 | case simple_control: | |
1102 | /* A simple command, execute it and return. */ | |
1103 | new_line = insert_args (cmd->line); | |
1104 | if (!new_line) | |
1105 | return invalid_control; | |
c13c43fd | 1106 | old_chain = make_cleanup (free_current_contents, &new_line); |
c906108c SS |
1107 | execute_command (new_line, 0); |
1108 | ret = cmd->control_type; | |
1109 | break; | |
1110 | ||
1111 | case continue_control: | |
1112 | case break_control: | |
1113 | /* Return for "continue", and "break" so we can either | |
c5aa993b | 1114 | continue the loop at the top, or break out. */ |
c906108c SS |
1115 | ret = cmd->control_type; |
1116 | break; | |
1117 | ||
1118 | case while_control: | |
1119 | { | |
1120 | /* Parse the loop control expression for the while statement. */ | |
1121 | new_line = insert_args (cmd->line); | |
1122 | if (!new_line) | |
1123 | return invalid_control; | |
c13c43fd | 1124 | old_chain = make_cleanup (free_current_contents, &new_line); |
c906108c | 1125 | expr = parse_expression (new_line); |
c13c43fd | 1126 | make_cleanup (free_current_contents, &expr); |
c5aa993b | 1127 | |
c906108c SS |
1128 | ret = simple_control; |
1129 | loop = 1; | |
1130 | ||
1131 | /* Keep iterating so long as the expression is true. */ | |
1132 | while (loop == 1) | |
1133 | { | |
1134 | int cond_result; | |
1135 | ||
1136 | QUIT; | |
1137 | ||
1138 | /* Evaluate the expression. */ | |
1139 | val_mark = value_mark (); | |
1140 | val = evaluate_expression (expr); | |
1141 | cond_result = value_true (val); | |
1142 | value_free_to_mark (val_mark); | |
1143 | ||
1144 | /* If the value is false, then break out of the loop. */ | |
1145 | if (!cond_result) | |
1146 | break; | |
1147 | ||
1148 | /* Execute the body of the while statement. */ | |
1149 | current = *cmd->body_list; | |
1150 | while (current) | |
1151 | { | |
1152 | ret = execute_control_command (current); | |
1153 | ||
1154 | /* If we got an error, or a "break" command, then stop | |
1155 | looping. */ | |
1156 | if (ret == invalid_control || ret == break_control) | |
1157 | { | |
1158 | loop = 0; | |
1159 | break; | |
1160 | } | |
1161 | ||
1162 | /* If we got a "continue" command, then restart the loop | |
1163 | at this point. */ | |
1164 | if (ret == continue_control) | |
1165 | break; | |
c5aa993b | 1166 | |
c906108c | 1167 | /* Get the next statement. */ |
c5aa993b | 1168 | current = current->next; |
c906108c SS |
1169 | } |
1170 | } | |
1171 | ||
1172 | /* Reset RET so that we don't recurse the break all the way down. */ | |
1173 | if (ret == break_control) | |
1174 | ret = simple_control; | |
1175 | ||
1176 | break; | |
1177 | } | |
1178 | ||
1179 | case if_control: | |
1180 | { | |
1181 | new_line = insert_args (cmd->line); | |
1182 | if (!new_line) | |
1183 | return invalid_control; | |
c13c43fd | 1184 | old_chain = make_cleanup (free_current_contents, &new_line); |
c906108c SS |
1185 | /* Parse the conditional for the if statement. */ |
1186 | expr = parse_expression (new_line); | |
c13c43fd | 1187 | make_cleanup (free_current_contents, &expr); |
c906108c SS |
1188 | |
1189 | current = NULL; | |
1190 | ret = simple_control; | |
1191 | ||
1192 | /* Evaluate the conditional. */ | |
1193 | val_mark = value_mark (); | |
1194 | val = evaluate_expression (expr); | |
1195 | ||
1196 | /* Choose which arm to take commands from based on the value of the | |
1197 | conditional expression. */ | |
1198 | if (value_true (val)) | |
1199 | current = *cmd->body_list; | |
1200 | else if (cmd->body_count == 2) | |
1201 | current = *(cmd->body_list + 1); | |
1202 | value_free_to_mark (val_mark); | |
1203 | ||
1204 | /* Execute commands in the given arm. */ | |
1205 | while (current) | |
1206 | { | |
1207 | ret = execute_control_command (current); | |
1208 | ||
1209 | /* If we got an error, get out. */ | |
1210 | if (ret != simple_control) | |
1211 | break; | |
1212 | ||
1213 | /* Get the next statement in the body. */ | |
1214 | current = current->next; | |
1215 | } | |
1216 | ||
1217 | break; | |
1218 | } | |
1219 | ||
1220 | default: | |
1221 | warning ("Invalid control type in command structure."); | |
1222 | return invalid_control; | |
1223 | } | |
1224 | ||
1225 | if (old_chain) | |
1226 | do_cleanups (old_chain); | |
1227 | ||
1228 | return ret; | |
1229 | } | |
1230 | ||
1231 | /* "while" command support. Executes a body of statements while the | |
1232 | loop condition is nonzero. */ | |
1233 | ||
1234 | static void | |
1235 | while_command (arg, from_tty) | |
1236 | char *arg; | |
1237 | int from_tty; | |
1238 | { | |
1239 | struct command_line *command = NULL; | |
1240 | ||
1241 | control_level = 1; | |
1242 | command = get_command_line (while_control, arg); | |
1243 | ||
1244 | if (command == NULL) | |
1245 | return; | |
1246 | ||
1247 | execute_control_command (command); | |
1248 | free_command_lines (&command); | |
1249 | } | |
1250 | ||
1251 | /* "if" command support. Execute either the true or false arm depending | |
1252 | on the value of the if conditional. */ | |
1253 | ||
1254 | static void | |
1255 | if_command (arg, from_tty) | |
1256 | char *arg; | |
1257 | int from_tty; | |
1258 | { | |
1259 | struct command_line *command = NULL; | |
1260 | ||
1261 | control_level = 1; | |
1262 | command = get_command_line (if_control, arg); | |
1263 | ||
1264 | if (command == NULL) | |
1265 | return; | |
1266 | ||
1267 | execute_control_command (command); | |
1268 | free_command_lines (&command); | |
1269 | } | |
1270 | ||
1271 | /* Cleanup */ | |
1272 | static void | |
e41a3b1a | 1273 | arg_cleanup (void *ignore) |
c906108c SS |
1274 | { |
1275 | struct user_args *oargs = user_args; | |
1276 | if (!user_args) | |
96baa820 | 1277 | internal_error ("Internal error, arg_cleanup called with no user args.\n"); |
c906108c SS |
1278 | |
1279 | user_args = user_args->next; | |
1280 | free (oargs); | |
1281 | } | |
1282 | ||
1283 | /* Bind the incomming arguments for a user defined command to | |
1284 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
1285 | ||
1286 | static struct cleanup * | |
1287 | setup_user_args (p) | |
1288 | char *p; | |
1289 | { | |
1290 | struct user_args *args; | |
1291 | struct cleanup *old_chain; | |
1292 | unsigned int arg_count = 0; | |
1293 | ||
c5aa993b | 1294 | args = (struct user_args *) xmalloc (sizeof (struct user_args)); |
c906108c SS |
1295 | memset (args, 0, sizeof (struct user_args)); |
1296 | ||
1297 | args->next = user_args; | |
1298 | user_args = args; | |
1299 | ||
e41a3b1a | 1300 | old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); |
c906108c SS |
1301 | |
1302 | if (p == NULL) | |
1303 | return old_chain; | |
1304 | ||
1305 | while (*p) | |
1306 | { | |
1307 | char *start_arg; | |
1308 | int squote = 0; | |
1309 | int dquote = 0; | |
1310 | int bsquote = 0; | |
1311 | ||
1312 | if (arg_count >= MAXUSERARGS) | |
1313 | { | |
1314 | error ("user defined function may only have %d arguments.\n", | |
1315 | MAXUSERARGS); | |
1316 | return old_chain; | |
1317 | } | |
1318 | ||
1319 | /* Strip whitespace. */ | |
1320 | while (*p == ' ' || *p == '\t') | |
1321 | p++; | |
1322 | ||
1323 | /* P now points to an argument. */ | |
1324 | start_arg = p; | |
1325 | user_args->a[arg_count].arg = p; | |
1326 | ||
1327 | /* Get to the end of this argument. */ | |
1328 | while (*p) | |
1329 | { | |
1330 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
1331 | break; | |
1332 | else | |
1333 | { | |
1334 | if (bsquote) | |
1335 | bsquote = 0; | |
1336 | else if (*p == '\\') | |
1337 | bsquote = 1; | |
1338 | else if (squote) | |
1339 | { | |
1340 | if (*p == '\'') | |
1341 | squote = 0; | |
1342 | } | |
1343 | else if (dquote) | |
1344 | { | |
1345 | if (*p == '"') | |
1346 | dquote = 0; | |
1347 | } | |
1348 | else | |
1349 | { | |
1350 | if (*p == '\'') | |
1351 | squote = 1; | |
1352 | else if (*p == '"') | |
1353 | dquote = 1; | |
1354 | } | |
1355 | p++; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | user_args->a[arg_count].len = p - start_arg; | |
1360 | arg_count++; | |
1361 | user_args->count++; | |
1362 | } | |
1363 | return old_chain; | |
1364 | } | |
1365 | ||
1366 | /* Given character string P, return a point to the first argument ($arg), | |
1367 | or NULL if P contains no arguments. */ | |
1368 | ||
1369 | static char * | |
1370 | locate_arg (p) | |
1371 | char *p; | |
1372 | { | |
1373 | while ((p = strchr (p, '$'))) | |
1374 | { | |
1375 | if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) | |
1376 | return p; | |
1377 | p++; | |
1378 | } | |
1379 | return NULL; | |
1380 | } | |
1381 | ||
1382 | /* Insert the user defined arguments stored in user_arg into the $arg | |
1383 | arguments found in line, with the updated copy being placed into nline. */ | |
1384 | ||
1385 | static char * | |
1386 | insert_args (line) | |
1387 | char *line; | |
1388 | { | |
1389 | char *p, *save_line, *new_line; | |
1390 | unsigned len, i; | |
1391 | ||
1392 | /* First we need to know how much memory to allocate for the new line. */ | |
1393 | save_line = line; | |
1394 | len = 0; | |
1395 | while ((p = locate_arg (line))) | |
1396 | { | |
1397 | len += p - line; | |
1398 | i = p[4] - '0'; | |
c5aa993b | 1399 | |
c906108c SS |
1400 | if (i >= user_args->count) |
1401 | { | |
1402 | error ("Missing argument %d in user function.\n", i); | |
1403 | return NULL; | |
1404 | } | |
1405 | len += user_args->a[i].len; | |
1406 | line = p + 5; | |
1407 | } | |
1408 | ||
1409 | /* Don't forget the tail. */ | |
1410 | len += strlen (line); | |
1411 | ||
1412 | /* Allocate space for the new line and fill it in. */ | |
c5aa993b | 1413 | new_line = (char *) xmalloc (len + 1); |
c906108c SS |
1414 | if (new_line == NULL) |
1415 | return NULL; | |
1416 | ||
1417 | /* Restore pointer to beginning of old line. */ | |
1418 | line = save_line; | |
1419 | ||
1420 | /* Save pointer to beginning of new line. */ | |
1421 | save_line = new_line; | |
1422 | ||
1423 | while ((p = locate_arg (line))) | |
1424 | { | |
1425 | int i, len; | |
1426 | ||
1427 | memcpy (new_line, line, p - line); | |
1428 | new_line += p - line; | |
1429 | i = p[4] - '0'; | |
1430 | ||
1431 | len = user_args->a[i].len; | |
1432 | if (len) | |
1433 | { | |
1434 | memcpy (new_line, user_args->a[i].arg, len); | |
1435 | new_line += len; | |
1436 | } | |
1437 | line = p + 5; | |
1438 | } | |
1439 | /* Don't forget the tail. */ | |
1440 | strcpy (new_line, line); | |
1441 | ||
1442 | /* Return a pointer to the beginning of the new line. */ | |
1443 | return save_line; | |
1444 | } | |
1445 | ||
1446 | void | |
1447 | execute_user_command (c, args) | |
1448 | struct cmd_list_element *c; | |
1449 | char *args; | |
1450 | { | |
1451 | register struct command_line *cmdlines; | |
1452 | struct cleanup *old_chain; | |
1453 | enum command_control_type ret; | |
1454 | ||
1455 | old_chain = setup_user_args (args); | |
1456 | ||
1457 | cmdlines = c->user_commands; | |
1458 | if (cmdlines == 0) | |
1459 | /* Null command */ | |
1460 | return; | |
1461 | ||
1462 | /* Set the instream to 0, indicating execution of a | |
1463 | user-defined function. */ | |
e41a3b1a | 1464 | old_chain = make_cleanup (do_restore_instream_cleanup, instream); |
c906108c SS |
1465 | instream = (FILE *) 0; |
1466 | while (cmdlines) | |
1467 | { | |
1468 | ret = execute_control_command (cmdlines); | |
1469 | if (ret != simple_control && ret != break_control) | |
1470 | { | |
1471 | warning ("Error in control structure.\n"); | |
1472 | break; | |
1473 | } | |
1474 | cmdlines = cmdlines->next; | |
1475 | } | |
1476 | do_cleanups (old_chain); | |
1477 | } | |
1478 | ||
1479 | /* Execute the line P as a command. | |
1480 | Pass FROM_TTY as second argument to the defining function. */ | |
1481 | ||
1482 | void | |
1483 | execute_command (p, from_tty) | |
1484 | char *p; | |
1485 | int from_tty; | |
1486 | { | |
1487 | register struct cmd_list_element *c; | |
1488 | register enum language flang; | |
1489 | static int warned = 0; | |
56382845 | 1490 | char *line; |
c906108c | 1491 | /* FIXME: These should really be in an appropriate header file */ |
a14ed312 | 1492 | extern void serial_log_command (const char *); |
c906108c SS |
1493 | |
1494 | free_all_values (); | |
1495 | ||
1496 | /* Force cleanup of any alloca areas if using C alloca instead of | |
1497 | a builtin alloca. */ | |
1498 | alloca (0); | |
1499 | ||
1500 | /* This can happen when command_line_input hits end of file. */ | |
1501 | if (p == NULL) | |
c5aa993b | 1502 | return; |
c906108c SS |
1503 | |
1504 | serial_log_command (p); | |
1505 | ||
c5aa993b JM |
1506 | while (*p == ' ' || *p == '\t') |
1507 | p++; | |
c906108c SS |
1508 | if (*p) |
1509 | { | |
1510 | char *arg; | |
56382845 | 1511 | line = p; |
eb2f494a | 1512 | |
c906108c | 1513 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
43ff13b4 JM |
1514 | |
1515 | /* If the target is running, we allow only a limited set of | |
1516 | commands. */ | |
6426a772 | 1517 | if (event_loop_p && target_can_async_p () && target_executing) |
43ff13b4 JM |
1518 | if (!strcmp (c->name, "help") |
1519 | && !strcmp (c->name, "pwd") | |
1520 | && !strcmp (c->name, "show") | |
1521 | && !strcmp (c->name, "stop")) | |
1522 | error ("Cannot execute this command while the target is running."); | |
1523 | ||
c906108c SS |
1524 | /* Pass null arg rather than an empty one. */ |
1525 | arg = *p ? p : 0; | |
1526 | ||
1527 | /* Clear off trailing whitespace, except for set and complete command. */ | |
1528 | if (arg && c->type != set_cmd && c->function.cfunc != complete_command) | |
1529 | { | |
1530 | p = arg + strlen (arg) - 1; | |
1531 | while (p >= arg && (*p == ' ' || *p == '\t')) | |
1532 | p--; | |
1533 | *(p + 1) = '\0'; | |
1534 | } | |
eb2f494a | 1535 | |
c906108c SS |
1536 | /* If this command has been hooked, run the hook first. */ |
1537 | if (c->hook) | |
c5aa993b | 1538 | execute_user_command (c->hook, (char *) 0); |
c906108c | 1539 | |
56382845 | 1540 | if (c->flags & DEPRECATED_WARN_USER) |
eb2f494a | 1541 | deprecated_cmd_warning (&line); |
56382845 | 1542 | |
c906108c SS |
1543 | if (c->class == class_user) |
1544 | execute_user_command (c, arg); | |
1545 | else if (c->type == set_cmd || c->type == show_cmd) | |
1546 | do_setshow_command (arg, from_tty & caution, c); | |
1547 | else if (c->function.cfunc == NO_FUNCTION) | |
1548 | error ("That is not a command, just a help topic."); | |
1549 | else if (call_command_hook) | |
1550 | call_command_hook (c, arg, from_tty & caution); | |
1551 | else | |
1552 | (*c->function.cfunc) (arg, from_tty & caution); | |
c5aa993b | 1553 | } |
c906108c SS |
1554 | |
1555 | /* Tell the user if the language has changed (except first time). */ | |
1556 | if (current_language != expected_language) | |
c5aa993b JM |
1557 | { |
1558 | if (language_mode == language_mode_auto) | |
1559 | { | |
1560 | language_info (1); /* Print what changed. */ | |
1561 | } | |
1562 | warned = 0; | |
c906108c | 1563 | } |
c906108c SS |
1564 | |
1565 | /* Warn the user if the working language does not match the | |
1566 | language of the current frame. Only warn the user if we are | |
1567 | actually running the program, i.e. there is a stack. */ | |
1568 | /* FIXME: This should be cacheing the frame and only running when | |
1569 | the frame changes. */ | |
1570 | ||
1571 | if (target_has_stack) | |
1572 | { | |
1573 | flang = get_frame_language (); | |
1574 | if (!warned | |
1575 | && flang != language_unknown | |
1576 | && flang != current_language->la_language) | |
1577 | { | |
1578 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
1579 | warned = 1; | |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | /* ARGSUSED */ | |
392a587b | 1585 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
1586 | gdb to use the event loop as the default command loop and we merge |
1587 | event-top.c into this file, top.c */ | |
1588 | /* static */ void | |
e41a3b1a | 1589 | command_loop_marker (void *foo) |
c906108c SS |
1590 | { |
1591 | } | |
1592 | ||
1593 | /* Read commands from `instream' and execute them | |
1594 | until end of file or error reading instream. */ | |
1595 | ||
1596 | void | |
1597 | command_loop () | |
1598 | { | |
1599 | struct cleanup *old_chain; | |
1600 | char *command; | |
1601 | int stdin_is_tty = ISATTY (stdin); | |
1602 | long time_at_cmd_start; | |
1603 | #ifdef HAVE_SBRK | |
1604 | long space_at_cmd_start = 0; | |
1605 | #endif | |
1606 | extern int display_time; | |
1607 | extern int display_space; | |
1608 | ||
1609 | while (instream && !feof (instream)) | |
1610 | { | |
1611 | #if defined(TUI) | |
1612 | extern int insert_mode; | |
1613 | #endif | |
1614 | if (window_hook && instream == stdin) | |
0f71a2f6 | 1615 | (*window_hook) (instream, get_prompt ()); |
c906108c SS |
1616 | |
1617 | quit_flag = 0; | |
1618 | if (instream == stdin && stdin_is_tty) | |
1619 | reinitialize_more_filter (); | |
e41a3b1a | 1620 | old_chain = make_cleanup (command_loop_marker, 0); |
c906108c SS |
1621 | |
1622 | #if defined(TUI) | |
1623 | /* A bit of paranoia: I want to make sure the "insert_mode" global | |
1624 | * is clear except when it is being used for command-line editing | |
1625 | * (see tuiIO.c, utils.c); otherwise normal output will | |
1626 | * get messed up in the TUI. So clear it before/after | |
1627 | * the command-line-input call. - RT | |
1628 | */ | |
1629 | insert_mode = 0; | |
1630 | #endif | |
1631 | /* Get a command-line. This calls the readline package. */ | |
c5aa993b | 1632 | command = command_line_input (instream == stdin ? |
0f71a2f6 | 1633 | get_prompt () : (char *) NULL, |
c906108c SS |
1634 | instream == stdin, "prompt"); |
1635 | #if defined(TUI) | |
1636 | insert_mode = 0; | |
1637 | #endif | |
1638 | if (command == 0) | |
1639 | return; | |
1640 | ||
1641 | time_at_cmd_start = get_run_time (); | |
1642 | ||
1643 | if (display_space) | |
1644 | { | |
1645 | #ifdef HAVE_SBRK | |
1646 | extern char **environ; | |
1647 | char *lim = (char *) sbrk (0); | |
1648 | ||
1649 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
1650 | #endif | |
1651 | } | |
1652 | ||
1653 | execute_command (command, instream == stdin); | |
1654 | /* Do any commands attached to breakpoint we stopped at. */ | |
1655 | bpstat_do_actions (&stop_bpstat); | |
1656 | do_cleanups (old_chain); | |
1657 | ||
1658 | if (display_time) | |
1659 | { | |
1660 | long cmd_time = get_run_time () - time_at_cmd_start; | |
1661 | ||
1662 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
1663 | cmd_time / 1000000, cmd_time % 1000000); | |
1664 | } | |
1665 | ||
1666 | if (display_space) | |
1667 | { | |
1668 | #ifdef HAVE_SBRK | |
1669 | extern char **environ; | |
1670 | char *lim = (char *) sbrk (0); | |
1671 | long space_now = lim - (char *) &environ; | |
1672 | long space_diff = space_now - space_at_cmd_start; | |
1673 | ||
1674 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
1675 | space_now, | |
1676 | (space_diff >= 0 ? '+' : '-'), | |
1677 | space_diff); | |
1678 | #endif | |
1679 | } | |
1680 | } | |
1681 | } | |
392a587b | 1682 | |
8b93c638 JM |
1683 | /* Read commands from `instream' and execute them until end of file or |
1684 | error reading instream. This command loop doesnt care about any | |
1685 | such things as displaying time and space usage. If the user asks | |
1686 | for those, they won't work. */ | |
1687 | void | |
1688 | simplified_command_loop (read_input_func, execute_command_func) | |
1689 | char *(*read_input_func) (char *); | |
1690 | void (*execute_command_func) (char *, int); | |
1691 | { | |
1692 | struct cleanup *old_chain; | |
1693 | char *command; | |
1694 | int stdin_is_tty = ISATTY (stdin); | |
1695 | ||
1696 | while (instream && !feof (instream)) | |
1697 | { | |
1698 | quit_flag = 0; | |
1699 | if (instream == stdin && stdin_is_tty) | |
1700 | reinitialize_more_filter (); | |
e41a3b1a | 1701 | old_chain = make_cleanup (command_loop_marker, 0); |
8b93c638 JM |
1702 | |
1703 | /* Get a command-line. */ | |
1704 | command = (*read_input_func) (instream == stdin ? | |
1705 | get_prompt () : (char *) NULL); | |
1706 | ||
1707 | if (command == 0) | |
1708 | return; | |
1709 | ||
1710 | (*execute_command_func) (command, instream == stdin); | |
1711 | ||
1712 | /* Do any commands attached to breakpoint we stopped at. */ | |
1713 | bpstat_do_actions (&stop_bpstat); | |
1714 | ||
1715 | do_cleanups (old_chain); | |
1716 | } | |
1717 | } | |
9e0b60a8 JM |
1718 | \f |
1719 | /* Commands call this if they do not want to be repeated by null lines. */ | |
1720 | ||
1721 | void | |
1722 | dont_repeat () | |
1723 | { | |
1724 | if (server_command) | |
1725 | return; | |
1726 | ||
1727 | /* If we aren't reading from standard input, we are saving the last | |
1728 | thing read from stdin in line and don't want to delete it. Null lines | |
1729 | won't repeat here in any case. */ | |
1730 | if (instream == stdin) | |
1731 | *line = 0; | |
1732 | } | |
1733 | \f | |
1734 | /* Read a line from the stream "instream" without command line editing. | |
1735 | ||
1736 | It prints PROMPT_ARG once at the start. | |
1737 | Action is compatible with "readline", e.g. space for the result is | |
1738 | malloc'd and should be freed by the caller. | |
1739 | ||
1740 | A NULL return means end of file. */ | |
1741 | char * | |
1742 | gdb_readline (prompt_arg) | |
1743 | char *prompt_arg; | |
1744 | { | |
1745 | int c; | |
1746 | char *result; | |
1747 | int input_index = 0; | |
1748 | int result_size = 80; | |
1749 | ||
1750 | if (prompt_arg) | |
1751 | { | |
1752 | /* Don't use a _filtered function here. It causes the assumed | |
c5aa993b JM |
1753 | character position to be off, since the newline we read from |
1754 | the user is not accounted for. */ | |
9e0b60a8 JM |
1755 | fputs_unfiltered (prompt_arg, gdb_stdout); |
1756 | #ifdef MPW | |
1757 | /* Move to a new line so the entered line doesn't have a prompt | |
c5aa993b | 1758 | on the front of it. */ |
9e0b60a8 JM |
1759 | fputs_unfiltered ("\n", gdb_stdout); |
1760 | #endif /* MPW */ | |
1761 | gdb_flush (gdb_stdout); | |
1762 | } | |
1763 | ||
1764 | result = (char *) xmalloc (result_size); | |
1765 | ||
1766 | while (1) | |
1767 | { | |
1768 | /* Read from stdin if we are executing a user defined command. | |
c5aa993b | 1769 | This is the right thing for prompt_for_continue, at least. */ |
9e0b60a8 JM |
1770 | c = fgetc (instream ? instream : stdin); |
1771 | ||
1772 | if (c == EOF) | |
1773 | { | |
1774 | if (input_index > 0) | |
1775 | /* The last line does not end with a newline. Return it, and | |
1776 | if we are called again fgetc will still return EOF and | |
1777 | we'll return NULL then. */ | |
1778 | break; | |
1779 | free (result); | |
1780 | return NULL; | |
1781 | } | |
1782 | ||
1783 | if (c == '\n') | |
1784 | #ifndef CRLF_SOURCE_FILES | |
1785 | break; | |
1786 | #else | |
1787 | { | |
1788 | if (input_index > 0 && result[input_index - 1] == '\r') | |
1789 | input_index--; | |
1790 | break; | |
1791 | } | |
1792 | #endif | |
1793 | ||
1794 | result[input_index++] = c; | |
1795 | while (input_index >= result_size) | |
1796 | { | |
1797 | result_size *= 2; | |
1798 | result = (char *) xrealloc (result, result_size); | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | result[input_index++] = '\0'; | |
1803 | return result; | |
1804 | } | |
1805 | ||
1806 | /* Variables which control command line editing and history | |
1807 | substitution. These variables are given default values at the end | |
1808 | of this file. */ | |
1809 | static int command_editing_p; | |
1810 | /* NOTE 1999-04-29: This variable will be static again, once we modify | |
1811 | gdb to use the event loop as the default command loop and we merge | |
1812 | event-top.c into this file, top.c */ | |
1813 | /* static */ int history_expansion_p; | |
1814 | static int write_history_p; | |
1815 | static int history_size; | |
1816 | static char *history_filename; | |
1817 | ||
1818 | /* readline uses the word breaks for two things: | |
1819 | (1) In figuring out where to point the TEXT parameter to the | |
1820 | rl_completion_entry_function. Since we don't use TEXT for much, | |
1821 | it doesn't matter a lot what the word breaks are for this purpose, but | |
1822 | it does affect how much stuff M-? lists. | |
1823 | (2) If one of the matches contains a word break character, readline | |
1824 | will quote it. That's why we switch between | |
1825 | gdb_completer_word_break_characters and | |
1826 | gdb_completer_command_word_break_characters. I'm not sure when | |
1827 | we need this behavior (perhaps for funky characters in C++ symbols?). */ | |
1828 | ||
1829 | /* Variables which are necessary for fancy command line editing. */ | |
1830 | char *gdb_completer_word_break_characters = | |
c5aa993b | 1831 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
9e0b60a8 JM |
1832 | |
1833 | /* When completing on command names, we remove '-' from the list of | |
1834 | word break characters, since we use it in command names. If the | |
1835 | readline library sees one in any of the current completion strings, | |
1836 | it thinks that the string needs to be quoted and automatically supplies | |
1837 | a leading quote. */ | |
1838 | char *gdb_completer_command_word_break_characters = | |
c5aa993b | 1839 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; |
9e0b60a8 | 1840 | |
ae678129 EZ |
1841 | /* When completing on file names, we remove from the list of word |
1842 | break characters any characters that are commonly used in file | |
1843 | names, such as '-', '+', '~', etc. Otherwise, readline displays | |
1844 | incorrect completion candidates. */ | |
1845 | char *gdb_completer_file_name_break_characters = " \t\n*|\"';:?/><"; | |
1846 | ||
9e0b60a8 JM |
1847 | /* Characters that can be used to quote completion strings. Note that we |
1848 | can't include '"' because the gdb C parser treats such quoted sequences | |
1849 | as strings. */ | |
1850 | char *gdb_completer_quote_characters = | |
c5aa993b | 1851 | "'"; |
9e0b60a8 JM |
1852 | |
1853 | /* Functions that are used as part of the fancy command line editing. */ | |
1854 | ||
1855 | /* This can be used for functions which don't want to complete on symbols | |
1856 | but don't want to complete on anything else either. */ | |
1857 | /* ARGSUSED */ | |
1858 | char ** | |
1859 | noop_completer (text, prefix) | |
1860 | char *text; | |
1861 | char *prefix; | |
1862 | { | |
1863 | return NULL; | |
1864 | } | |
1865 | ||
1866 | /* Complete on filenames. */ | |
1867 | char ** | |
1868 | filename_completer (text, word) | |
1869 | char *text; | |
1870 | char *word; | |
1871 | { | |
1872 | /* From readline. */ | |
a14ed312 | 1873 | extern char *filename_completion_function (char *, int); |
9e0b60a8 JM |
1874 | int subsequent_name; |
1875 | char **return_val; | |
1876 | int return_val_used; | |
1877 | int return_val_alloced; | |
1878 | ||
1879 | return_val_used = 0; | |
1880 | /* Small for testing. */ | |
1881 | return_val_alloced = 1; | |
1882 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); | |
1883 | ||
1884 | subsequent_name = 0; | |
1885 | while (1) | |
1886 | { | |
1887 | char *p; | |
1888 | p = filename_completion_function (text, subsequent_name); | |
1889 | if (return_val_used >= return_val_alloced) | |
1890 | { | |
1891 | return_val_alloced *= 2; | |
1892 | return_val = | |
1893 | (char **) xrealloc (return_val, | |
1894 | return_val_alloced * sizeof (char *)); | |
1895 | } | |
1896 | if (p == NULL) | |
1897 | { | |
1898 | return_val[return_val_used++] = p; | |
1899 | break; | |
1900 | } | |
bcea15ac EZ |
1901 | /* We need to set subsequent_name to a non-zero value before the |
1902 | continue line below, because otherwise, if the first file seen | |
1903 | by GDB is a backup file whose name ends in a `~', we will loop | |
1904 | indefinitely. */ | |
1905 | subsequent_name = 1; | |
9e0b60a8 | 1906 | /* Like emacs, don't complete on old versions. Especially useful |
c5aa993b | 1907 | in the "source" command. */ |
9e0b60a8 JM |
1908 | if (p[strlen (p) - 1] == '~') |
1909 | continue; | |
1910 | ||
1911 | { | |
1912 | char *q; | |
1913 | if (word == text) | |
1914 | /* Return exactly p. */ | |
1915 | return_val[return_val_used++] = p; | |
1916 | else if (word > text) | |
1917 | { | |
1918 | /* Return some portion of p. */ | |
1919 | q = xmalloc (strlen (p) + 5); | |
1920 | strcpy (q, p + (word - text)); | |
1921 | return_val[return_val_used++] = q; | |
1922 | free (p); | |
1923 | } | |
1924 | else | |
1925 | { | |
1926 | /* Return some of TEXT plus p. */ | |
1927 | q = xmalloc (strlen (p) + (text - word) + 5); | |
1928 | strncpy (q, word, text - word); | |
1929 | q[text - word] = '\0'; | |
1930 | strcat (q, p); | |
1931 | return_val[return_val_used++] = q; | |
1932 | free (p); | |
1933 | } | |
1934 | } | |
9e0b60a8 JM |
1935 | } |
1936 | #if 0 | |
1937 | /* There is no way to do this just long enough to affect quote inserting | |
1938 | without also affecting the next completion. This should be fixed in | |
1939 | readline. FIXME. */ | |
1940 | /* Insure that readline does the right thing | |
1941 | with respect to inserting quotes. */ | |
1942 | rl_completer_word_break_characters = ""; | |
1943 | #endif | |
1944 | return return_val; | |
1945 | } | |
1946 | ||
1947 | /* Here are some useful test cases for completion. FIXME: These should | |
1948 | be put in the test suite. They should be tested with both M-? and TAB. | |
1949 | ||
1950 | "show output-" "radix" | |
1951 | "show output" "-radix" | |
1952 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1953 | "p " ambiguous (all symbols) | |
1954 | "info t foo" no completions | |
1955 | "info t " no completions | |
1956 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1957 | "info ajksdlfk" no completions | |
1958 | "info ajksdlfk " no completions | |
1959 | "info" " " | |
1960 | "info " ambiguous (all info commands) | |
1961 | "p \"a" no completions (string constant) | |
1962 | "p 'a" ambiguous (all symbols starting with a) | |
1963 | "p b-a" ambiguous (all symbols starting with a) | |
1964 | "p b-" ambiguous (all symbols) | |
1965 | "file Make" "file" (word break hard to screw up here) | |
1966 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
c5aa993b | 1967 | */ |
9e0b60a8 JM |
1968 | |
1969 | /* Generate completions one by one for the completer. Each time we are | |
1970 | called return another potential completion to the caller. | |
1971 | line_completion just completes on commands or passes the buck to the | |
1972 | command's completer function, the stuff specific to symbol completion | |
1973 | is in make_symbol_completion_list. | |
1974 | ||
1975 | TEXT is the caller's idea of the "word" we are looking at. | |
1976 | ||
1977 | MATCHES is the number of matches that have currently been collected from | |
1978 | calling this completion function. When zero, then we need to initialize, | |
1979 | otherwise the initialization has already taken place and we can just | |
1980 | return the next potential completion string. | |
1981 | ||
1982 | LINE_BUFFER is available to be looked at; it contains the entire text | |
1983 | of the line. POINT is the offset in that line of the cursor. You | |
1984 | should pretend that the line ends at POINT. | |
1985 | ||
1986 | Returns NULL if there are no more completions, else a pointer to a string | |
1987 | which is a possible completion, it is the caller's responsibility to | |
1988 | free the string. */ | |
1989 | ||
1990 | static char * | |
1991 | line_completion_function (text, matches, line_buffer, point) | |
1992 | char *text; | |
1993 | int matches; | |
1994 | char *line_buffer; | |
1995 | int point; | |
1996 | { | |
c5aa993b JM |
1997 | static char **list = (char **) NULL; /* Cache of completions */ |
1998 | static int index; /* Next cached completion */ | |
9e0b60a8 JM |
1999 | char *output = NULL; |
2000 | char *tmp_command, *p; | |
2001 | /* Pointer within tmp_command which corresponds to text. */ | |
2002 | char *word; | |
2003 | struct cmd_list_element *c, *result_list; | |
2004 | ||
2005 | if (matches == 0) | |
2006 | { | |
2007 | /* The caller is beginning to accumulate a new set of completions, so | |
c5aa993b JM |
2008 | we need to find all of them now, and cache them for returning one at |
2009 | a time on future calls. */ | |
9e0b60a8 JM |
2010 | |
2011 | if (list) | |
2012 | { | |
2013 | /* Free the storage used by LIST, but not by the strings inside. | |
2014 | This is because rl_complete_internal () frees the strings. */ | |
c5aa993b | 2015 | free ((PTR) list); |
9e0b60a8 JM |
2016 | } |
2017 | list = 0; | |
2018 | index = 0; | |
2019 | ||
2020 | /* Choose the default set of word break characters to break completions. | |
c5aa993b JM |
2021 | If we later find out that we are doing completions on command strings |
2022 | (as opposed to strings supplied by the individual command completer | |
2023 | functions, which can be any string) then we will switch to the | |
2024 | special word break set for command strings, which leaves out the | |
2025 | '-' character used in some commands. */ | |
9e0b60a8 JM |
2026 | |
2027 | rl_completer_word_break_characters = | |
c5aa993b | 2028 | gdb_completer_word_break_characters; |
9e0b60a8 JM |
2029 | |
2030 | /* Decide whether to complete on a list of gdb commands or on symbols. */ | |
2031 | tmp_command = (char *) alloca (point + 1); | |
2032 | p = tmp_command; | |
2033 | ||
2034 | strncpy (tmp_command, line_buffer, point); | |
2035 | tmp_command[point] = '\0'; | |
2036 | /* Since text always contains some number of characters leading up | |
c5aa993b JM |
2037 | to point, we can find the equivalent position in tmp_command |
2038 | by subtracting that many characters from the end of tmp_command. */ | |
9e0b60a8 JM |
2039 | word = tmp_command + point - strlen (text); |
2040 | ||
2041 | if (point == 0) | |
2042 | { | |
2043 | /* An empty line we want to consider ambiguous; that is, it | |
2044 | could be any command. */ | |
2045 | c = (struct cmd_list_element *) -1; | |
2046 | result_list = 0; | |
2047 | } | |
2048 | else | |
2049 | { | |
2050 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
2051 | } | |
2052 | ||
2053 | /* Move p up to the next interesting thing. */ | |
2054 | while (*p == ' ' || *p == '\t') | |
2055 | { | |
2056 | p++; | |
2057 | } | |
2058 | ||
2059 | if (!c) | |
2060 | { | |
2061 | /* It is an unrecognized command. So there are no | |
2062 | possible completions. */ | |
2063 | list = NULL; | |
2064 | } | |
2065 | else if (c == (struct cmd_list_element *) -1) | |
2066 | { | |
2067 | char *q; | |
2068 | ||
2069 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
2070 | doesn't advance over that thing itself. Do so now. */ | |
2071 | q = p; | |
2072 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
2073 | ++q; | |
2074 | if (q != tmp_command + point) | |
2075 | { | |
2076 | /* There is something beyond the ambiguous | |
c5aa993b JM |
2077 | command, so there are no possible completions. For |
2078 | example, "info t " or "info t foo" does not complete | |
2079 | to anything, because "info t" can be "info target" or | |
2080 | "info terminal". */ | |
9e0b60a8 JM |
2081 | list = NULL; |
2082 | } | |
2083 | else | |
2084 | { | |
2085 | /* We're trying to complete on the command which was ambiguous. | |
c5aa993b | 2086 | This we can deal with. */ |
9e0b60a8 JM |
2087 | if (result_list) |
2088 | { | |
2089 | list = complete_on_cmdlist (*result_list->prefixlist, p, | |
2090 | word); | |
2091 | } | |
2092 | else | |
2093 | { | |
2094 | list = complete_on_cmdlist (cmdlist, p, word); | |
2095 | } | |
2096 | /* Insure that readline does the right thing with respect to | |
c5aa993b | 2097 | inserting quotes. */ |
9e0b60a8 JM |
2098 | rl_completer_word_break_characters = |
2099 | gdb_completer_command_word_break_characters; | |
2100 | } | |
2101 | } | |
2102 | else | |
2103 | { | |
2104 | /* We've recognized a full command. */ | |
2105 | ||
2106 | if (p == tmp_command + point) | |
2107 | { | |
2108 | /* There is no non-whitespace in the line beyond the command. */ | |
2109 | ||
2110 | if (p[-1] == ' ' || p[-1] == '\t') | |
2111 | { | |
2112 | /* The command is followed by whitespace; we need to complete | |
2113 | on whatever comes after command. */ | |
2114 | if (c->prefixlist) | |
2115 | { | |
2116 | /* It is a prefix command; what comes after it is | |
c5aa993b | 2117 | a subcommand (e.g. "info "). */ |
9e0b60a8 JM |
2118 | list = complete_on_cmdlist (*c->prefixlist, p, word); |
2119 | ||
2120 | /* Insure that readline does the right thing | |
c5aa993b | 2121 | with respect to inserting quotes. */ |
9e0b60a8 JM |
2122 | rl_completer_word_break_characters = |
2123 | gdb_completer_command_word_break_characters; | |
2124 | } | |
2125 | else if (c->enums) | |
2126 | { | |
2127 | list = complete_on_enum (c->enums, p, word); | |
2128 | rl_completer_word_break_characters = | |
2129 | gdb_completer_command_word_break_characters; | |
2130 | } | |
2131 | else | |
2132 | { | |
2133 | /* It is a normal command; what comes after it is | |
c5aa993b | 2134 | completed by the command's completer function. */ |
9e0b60a8 | 2135 | list = (*c->completer) (p, word); |
ae678129 EZ |
2136 | if (c->completer == filename_completer) |
2137 | rl_completer_word_break_characters = | |
2138 | gdb_completer_file_name_break_characters; | |
9e0b60a8 JM |
2139 | } |
2140 | } | |
2141 | else | |
2142 | { | |
2143 | /* The command is not followed by whitespace; we need to | |
2144 | complete on the command itself. e.g. "p" which is a | |
2145 | command itself but also can complete to "print", "ptype" | |
2146 | etc. */ | |
2147 | char *q; | |
2148 | ||
2149 | /* Find the command we are completing on. */ | |
2150 | q = p; | |
2151 | while (q > tmp_command) | |
2152 | { | |
2153 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
2154 | --q; | |
2155 | else | |
2156 | break; | |
2157 | } | |
2158 | ||
2159 | list = complete_on_cmdlist (result_list, q, word); | |
2160 | ||
2161 | /* Insure that readline does the right thing | |
2162 | with respect to inserting quotes. */ | |
2163 | rl_completer_word_break_characters = | |
2164 | gdb_completer_command_word_break_characters; | |
2165 | } | |
2166 | } | |
2167 | else | |
2168 | { | |
2169 | /* There is non-whitespace beyond the command. */ | |
2170 | ||
2171 | if (c->prefixlist && !c->allow_unknown) | |
2172 | { | |
2173 | /* It is an unrecognized subcommand of a prefix command, | |
2174 | e.g. "info adsfkdj". */ | |
2175 | list = NULL; | |
2176 | } | |
2177 | else if (c->enums) | |
2178 | { | |
2179 | list = complete_on_enum (c->enums, p, word); | |
2180 | } | |
2181 | else | |
2182 | { | |
2183 | /* It is a normal command. */ | |
2184 | list = (*c->completer) (p, word); | |
ae678129 EZ |
2185 | if (c->completer == filename_completer) |
2186 | rl_completer_word_break_characters = | |
2187 | gdb_completer_file_name_break_characters; | |
9e0b60a8 JM |
2188 | } |
2189 | } | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | /* If we found a list of potential completions during initialization then | |
2194 | dole them out one at a time. The vector of completions is NULL | |
2195 | terminated, so after returning the last one, return NULL (and continue | |
2196 | to do so) each time we are called after that, until a new list is | |
2197 | available. */ | |
2198 | ||
2199 | if (list) | |
2200 | { | |
2201 | output = list[index]; | |
2202 | if (output) | |
2203 | { | |
2204 | index++; | |
2205 | } | |
2206 | } | |
2207 | ||
2208 | #if 0 | |
2209 | /* Can't do this because readline hasn't yet checked the word breaks | |
2210 | for figuring out whether to insert a quote. */ | |
2211 | if (output == NULL) | |
2212 | /* Make sure the word break characters are set back to normal for the | |
2213 | next time that readline tries to complete something. */ | |
2214 | rl_completer_word_break_characters = | |
2215 | gdb_completer_word_break_characters; | |
2216 | #endif | |
2217 | ||
2218 | return (output); | |
2219 | } | |
2220 | ||
2221 | /* Line completion interface function for readline. */ | |
2222 | ||
2223 | static char * | |
2224 | readline_line_completion_function (text, matches) | |
2225 | char *text; | |
2226 | int matches; | |
2227 | { | |
2228 | return line_completion_function (text, matches, rl_line_buffer, rl_point); | |
2229 | } | |
2230 | ||
2231 | /* Skip over a possibly quoted word (as defined by the quote characters | |
2232 | and word break characters the completer uses). Returns pointer to the | |
2233 | location after the "word". */ | |
2234 | ||
2235 | char * | |
2236 | skip_quoted (str) | |
2237 | char *str; | |
2238 | { | |
2239 | char quote_char = '\0'; | |
2240 | char *scan; | |
2241 | ||
2242 | for (scan = str; *scan != '\0'; scan++) | |
2243 | { | |
2244 | if (quote_char != '\0') | |
2245 | { | |
2246 | /* Ignore everything until the matching close quote char */ | |
2247 | if (*scan == quote_char) | |
2248 | { | |
2249 | /* Found matching close quote. */ | |
2250 | scan++; | |
2251 | break; | |
2252 | } | |
2253 | } | |
2254 | else if (strchr (gdb_completer_quote_characters, *scan)) | |
2255 | { | |
2256 | /* Found start of a quoted string. */ | |
2257 | quote_char = *scan; | |
2258 | } | |
2259 | else if (strchr (gdb_completer_word_break_characters, *scan)) | |
2260 | { | |
2261 | break; | |
2262 | } | |
2263 | } | |
2264 | return (scan); | |
2265 | } | |
9e0b60a8 | 2266 | \f |
c5aa993b | 2267 | |
9e0b60a8 JM |
2268 | #ifdef STOP_SIGNAL |
2269 | static void | |
2270 | stop_sig (signo) | |
c5aa993b | 2271 | int signo; |
9e0b60a8 JM |
2272 | { |
2273 | #if STOP_SIGNAL == SIGTSTP | |
2274 | signal (SIGTSTP, SIG_DFL); | |
2275 | sigsetmask (0); | |
2276 | kill (getpid (), SIGTSTP); | |
2277 | signal (SIGTSTP, stop_sig); | |
2278 | #else | |
2279 | signal (STOP_SIGNAL, stop_sig); | |
2280 | #endif | |
2281 | printf_unfiltered ("%s", get_prompt ()); | |
2282 | gdb_flush (gdb_stdout); | |
2283 | ||
2284 | /* Forget about any previous command -- null line now will do nothing. */ | |
2285 | dont_repeat (); | |
2286 | } | |
2287 | #endif /* STOP_SIGNAL */ | |
2288 | ||
2289 | /* Initialize signal handlers. */ | |
2290 | static void | |
2291 | do_nothing (signo) | |
c5aa993b | 2292 | int signo; |
9e0b60a8 JM |
2293 | { |
2294 | /* Under System V the default disposition of a signal is reinstated after | |
2295 | the signal is caught and delivered to an application process. On such | |
2296 | systems one must restore the replacement signal handler if one wishes | |
2297 | to continue handling the signal in one's program. On BSD systems this | |
2298 | is not needed but it is harmless, and it simplifies the code to just do | |
2299 | it unconditionally. */ | |
2300 | signal (signo, do_nothing); | |
2301 | } | |
2302 | ||
2303 | static void | |
2304 | init_signals () | |
2305 | { | |
2306 | signal (SIGINT, request_quit); | |
2307 | ||
2308 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
2309 | to the inferior and breakpoints will be ignored. */ | |
2310 | #ifdef SIGTRAP | |
2311 | signal (SIGTRAP, SIG_DFL); | |
2312 | #endif | |
2313 | ||
2314 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
2315 | passed to the inferior, which we don't want. It would be | |
2316 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
2317 | on BSD4.3 systems using vfork, that can affect the | |
2318 | GDB process as well as the inferior (the signal handling tables | |
2319 | might be in memory, shared between the two). Since we establish | |
2320 | a handler for SIGQUIT, when we call exec it will set the signal | |
2321 | to SIG_DFL for us. */ | |
2322 | signal (SIGQUIT, do_nothing); | |
2323 | #ifdef SIGHUP | |
2324 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
2325 | signal (SIGHUP, disconnect); | |
2326 | #endif | |
2327 | signal (SIGFPE, float_handler); | |
2328 | ||
2329 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
2330 | signal (SIGWINCH, SIGWINCH_HANDLER); | |
2331 | #endif | |
2332 | } | |
2333 | \f | |
2334 | /* Read one line from the command input stream `instream' | |
2335 | into the local static buffer `linebuffer' (whose current length | |
2336 | is `linelength'). | |
2337 | The buffer is made bigger as necessary. | |
2338 | Returns the address of the start of the line. | |
2339 | ||
2340 | NULL is returned for end of file. | |
2341 | ||
2342 | *If* the instream == stdin & stdin is a terminal, the line read | |
2343 | is copied into the file line saver (global var char *line, | |
2344 | length linesize) so that it can be duplicated. | |
2345 | ||
2346 | This routine either uses fancy command line editing or | |
2347 | simple input as the user has requested. */ | |
2348 | ||
2349 | char * | |
2350 | command_line_input (prompt_arg, repeat, annotation_suffix) | |
2351 | char *prompt_arg; | |
2352 | int repeat; | |
2353 | char *annotation_suffix; | |
2354 | { | |
2355 | static char *linebuffer = 0; | |
2356 | static unsigned linelength = 0; | |
2357 | register char *p; | |
2358 | char *p1; | |
2359 | char *rl; | |
2360 | char *local_prompt = prompt_arg; | |
2361 | char *nline; | |
2362 | char got_eof = 0; | |
2363 | ||
2364 | /* The annotation suffix must be non-NULL. */ | |
2365 | if (annotation_suffix == NULL) | |
2366 | annotation_suffix = ""; | |
2367 | ||
2368 | if (annotation_level > 1 && instream == stdin) | |
2369 | { | |
2370 | local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) | |
2371 | + strlen (annotation_suffix) + 40); | |
2372 | if (prompt_arg == NULL) | |
2373 | local_prompt[0] = '\0'; | |
2374 | else | |
2375 | strcpy (local_prompt, prompt_arg); | |
2376 | strcat (local_prompt, "\n\032\032"); | |
2377 | strcat (local_prompt, annotation_suffix); | |
2378 | strcat (local_prompt, "\n"); | |
2379 | } | |
2380 | ||
2381 | if (linebuffer == 0) | |
2382 | { | |
2383 | linelength = 80; | |
2384 | linebuffer = (char *) xmalloc (linelength); | |
2385 | } | |
2386 | ||
2387 | p = linebuffer; | |
2388 | ||
2389 | /* Control-C quits instantly if typed while in this loop | |
2390 | since it should not wait until the user types a newline. */ | |
2391 | immediate_quit++; | |
2392 | #ifdef STOP_SIGNAL | |
2393 | if (job_control) | |
2394 | { | |
6426a772 | 2395 | if (event_loop_p) |
9e0b60a8 JM |
2396 | signal (STOP_SIGNAL, handle_stop_sig); |
2397 | else | |
2398 | signal (STOP_SIGNAL, stop_sig); | |
2399 | } | |
2400 | #endif | |
2401 | ||
2402 | while (1) | |
2403 | { | |
2404 | /* Make sure that all output has been output. Some machines may let | |
c5aa993b | 2405 | you get away with leaving out some of the gdb_flush, but not all. */ |
9e0b60a8 JM |
2406 | wrap_here (""); |
2407 | gdb_flush (gdb_stdout); | |
2408 | gdb_flush (gdb_stderr); | |
2409 | ||
2410 | if (source_file_name != NULL) | |
2411 | { | |
2412 | ++source_line_number; | |
2413 | sprintf (source_error, | |
2414 | "%s%s:%d: Error in sourced command file:\n", | |
2415 | source_pre_error, | |
2416 | source_file_name, | |
2417 | source_line_number); | |
2418 | error_pre_print = source_error; | |
2419 | } | |
2420 | ||
2421 | if (annotation_level > 1 && instream == stdin) | |
2422 | { | |
2423 | printf_unfiltered ("\n\032\032pre-"); | |
2424 | printf_unfiltered (annotation_suffix); | |
2425 | printf_unfiltered ("\n"); | |
2426 | } | |
2427 | ||
2428 | /* Don't use fancy stuff if not talking to stdin. */ | |
2429 | if (readline_hook && instream == NULL) | |
2430 | { | |
2431 | rl = (*readline_hook) (local_prompt); | |
2432 | } | |
2433 | else if (command_editing_p && instream == stdin && ISATTY (instream)) | |
2434 | { | |
2435 | rl = readline (local_prompt); | |
2436 | } | |
2437 | else | |
2438 | { | |
2439 | rl = gdb_readline (local_prompt); | |
2440 | } | |
2441 | ||
2442 | if (annotation_level > 1 && instream == stdin) | |
2443 | { | |
2444 | printf_unfiltered ("\n\032\032post-"); | |
2445 | printf_unfiltered (annotation_suffix); | |
2446 | printf_unfiltered ("\n"); | |
2447 | } | |
2448 | ||
2449 | if (!rl || rl == (char *) EOF) | |
2450 | { | |
2451 | got_eof = 1; | |
2452 | break; | |
2453 | } | |
c5aa993b | 2454 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
9e0b60a8 | 2455 | { |
c5aa993b | 2456 | linelength = strlen (rl) + 1 + (p - linebuffer); |
9e0b60a8 JM |
2457 | nline = (char *) xrealloc (linebuffer, linelength); |
2458 | p += nline - linebuffer; | |
2459 | linebuffer = nline; | |
2460 | } | |
2461 | p1 = rl; | |
2462 | /* Copy line. Don't copy null at end. (Leaves line alone | |
2463 | if this was just a newline) */ | |
2464 | while (*p1) | |
2465 | *p++ = *p1++; | |
2466 | ||
c5aa993b | 2467 | free (rl); /* Allocated in readline. */ |
9e0b60a8 JM |
2468 | |
2469 | if (p == linebuffer || *(p - 1) != '\\') | |
2470 | break; | |
2471 | ||
2472 | p--; /* Put on top of '\'. */ | |
2473 | local_prompt = (char *) 0; | |
c5aa993b | 2474 | } |
9e0b60a8 JM |
2475 | |
2476 | #ifdef STOP_SIGNAL | |
2477 | if (job_control) | |
2478 | signal (STOP_SIGNAL, SIG_DFL); | |
2479 | #endif | |
2480 | immediate_quit--; | |
2481 | ||
2482 | if (got_eof) | |
2483 | return NULL; | |
2484 | ||
2485 | #define SERVER_COMMAND_LENGTH 7 | |
2486 | server_command = | |
2487 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
c5aa993b | 2488 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); |
9e0b60a8 JM |
2489 | if (server_command) |
2490 | { | |
2491 | /* Note that we don't set `line'. Between this and the check in | |
c5aa993b JM |
2492 | dont_repeat, this insures that repeating will still do the |
2493 | right thing. */ | |
9e0b60a8 JM |
2494 | *p = '\0'; |
2495 | return linebuffer + SERVER_COMMAND_LENGTH; | |
2496 | } | |
2497 | ||
2498 | /* Do history expansion if that is wished. */ | |
2499 | if (history_expansion_p && instream == stdin | |
2500 | && ISATTY (instream)) | |
2501 | { | |
2502 | char *history_value; | |
2503 | int expanded; | |
2504 | ||
2505 | *p = '\0'; /* Insert null now. */ | |
2506 | expanded = history_expand (linebuffer, &history_value); | |
2507 | if (expanded) | |
2508 | { | |
2509 | /* Print the changes. */ | |
2510 | printf_unfiltered ("%s\n", history_value); | |
2511 | ||
2512 | /* If there was an error, call this function again. */ | |
2513 | if (expanded < 0) | |
2514 | { | |
2515 | free (history_value); | |
2516 | return command_line_input (prompt_arg, repeat, annotation_suffix); | |
2517 | } | |
2518 | if (strlen (history_value) > linelength) | |
2519 | { | |
2520 | linelength = strlen (history_value) + 1; | |
2521 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
2522 | } | |
2523 | strcpy (linebuffer, history_value); | |
c5aa993b | 2524 | p = linebuffer + strlen (linebuffer); |
9e0b60a8 JM |
2525 | free (history_value); |
2526 | } | |
2527 | } | |
2528 | ||
2529 | /* If we just got an empty line, and that is supposed | |
2530 | to repeat the previous command, return the value in the | |
2531 | global buffer. */ | |
2532 | if (repeat && p == linebuffer) | |
2533 | return line; | |
c5aa993b | 2534 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); |
9e0b60a8 JM |
2535 | if (repeat && !*p1) |
2536 | return line; | |
2537 | ||
2538 | *p = 0; | |
2539 | ||
2540 | /* Add line to history if appropriate. */ | |
2541 | if (instream == stdin | |
2542 | && ISATTY (stdin) && *linebuffer) | |
2543 | add_history (linebuffer); | |
2544 | ||
2545 | /* Note: lines consisting solely of comments are added to the command | |
2546 | history. This is useful when you type a command, and then | |
2547 | realize you don't want to execute it quite yet. You can comment | |
2548 | out the command and then later fetch it from the value history | |
2549 | and remove the '#'. The kill ring is probably better, but some | |
2550 | people are in the habit of commenting things out. */ | |
2551 | if (*p1 == '#') | |
c5aa993b | 2552 | *p1 = '\0'; /* Found a comment. */ |
9e0b60a8 JM |
2553 | |
2554 | /* Save into global buffer if appropriate. */ | |
2555 | if (repeat) | |
2556 | { | |
2557 | if (linelength > linesize) | |
2558 | { | |
2559 | line = xrealloc (line, linelength); | |
2560 | linesize = linelength; | |
2561 | } | |
2562 | strcpy (line, linebuffer); | |
2563 | return line; | |
2564 | } | |
2565 | ||
2566 | return linebuffer; | |
2567 | } | |
2568 | \f | |
2569 | ||
2570 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
2571 | code bodies. This is typically used when we encounter an "else" | |
2572 | clause for an "if" command. */ | |
2573 | ||
2574 | static void | |
2575 | realloc_body_list (command, new_length) | |
2576 | struct command_line *command; | |
2577 | int new_length; | |
2578 | { | |
2579 | int n; | |
2580 | struct command_line **body_list; | |
2581 | ||
2582 | n = command->body_count; | |
2583 | ||
2584 | /* Nothing to do? */ | |
2585 | if (new_length <= n) | |
2586 | return; | |
2587 | ||
2588 | body_list = (struct command_line **) | |
2589 | xmalloc (sizeof (struct command_line *) * new_length); | |
2590 | ||
2591 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
2592 | ||
2593 | free (command->body_list); | |
2594 | command->body_list = body_list; | |
2595 | command->body_count = new_length; | |
2596 | } | |
2597 | ||
2598 | /* Read one line from the input stream. If the command is an "else" or | |
2599 | "end", return such an indication to the caller. */ | |
2600 | ||
2601 | static enum misc_command_type | |
2602 | read_next_line (command) | |
2603 | struct command_line **command; | |
2604 | { | |
2605 | char *p, *p1, *prompt_ptr, control_prompt[256]; | |
2606 | int i = 0; | |
2607 | ||
2608 | if (control_level >= 254) | |
2609 | error ("Control nesting too deep!\n"); | |
2610 | ||
2611 | /* Set a prompt based on the nesting of the control commands. */ | |
2612 | if (instream == stdin || (instream == 0 && readline_hook != NULL)) | |
2613 | { | |
2614 | for (i = 0; i < control_level; i++) | |
2615 | control_prompt[i] = ' '; | |
2616 | control_prompt[i] = '>'; | |
c5aa993b JM |
2617 | control_prompt[i + 1] = '\0'; |
2618 | prompt_ptr = (char *) &control_prompt[0]; | |
9e0b60a8 JM |
2619 | } |
2620 | else | |
2621 | prompt_ptr = NULL; | |
2622 | ||
2623 | p = command_line_input (prompt_ptr, instream == stdin, "commands"); | |
2624 | ||
2625 | /* Not sure what to do here. */ | |
2626 | if (p == NULL) | |
2627 | return end_command; | |
2628 | ||
2629 | /* Strip leading and trailing whitespace. */ | |
2630 | while (*p == ' ' || *p == '\t') | |
2631 | p++; | |
2632 | ||
2633 | p1 = p + strlen (p); | |
2634 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) | |
2635 | p1--; | |
2636 | ||
2637 | /* Blanks and comments don't really do anything, but we need to | |
2638 | distinguish them from else, end and other commands which can be | |
2639 | executed. */ | |
2640 | if (p1 == p || p[0] == '#') | |
2641 | return nop_command; | |
c5aa993b | 2642 | |
9e0b60a8 JM |
2643 | /* Is this the end of a simple, while, or if control structure? */ |
2644 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
2645 | return end_command; | |
2646 | ||
2647 | /* Is the else clause of an if control structure? */ | |
2648 | if (p1 - p == 4 && !strncmp (p, "else", 4)) | |
2649 | return else_command; | |
2650 | ||
2651 | /* Check for while, if, break, continue, etc and build a new command | |
2652 | line structure for them. */ | |
2653 | if (p1 - p > 5 && !strncmp (p, "while", 5)) | |
2654 | *command = build_command_line (while_control, p + 6); | |
2655 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) | |
2656 | *command = build_command_line (if_control, p + 3); | |
2657 | else if (p1 - p == 10 && !strncmp (p, "loop_break", 10)) | |
2658 | { | |
2659 | *command = (struct command_line *) | |
2660 | xmalloc (sizeof (struct command_line)); | |
2661 | (*command)->next = NULL; | |
2662 | (*command)->line = NULL; | |
2663 | (*command)->control_type = break_control; | |
2664 | (*command)->body_count = 0; | |
2665 | (*command)->body_list = NULL; | |
2666 | } | |
2667 | else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13)) | |
2668 | { | |
2669 | *command = (struct command_line *) | |
2670 | xmalloc (sizeof (struct command_line)); | |
2671 | (*command)->next = NULL; | |
2672 | (*command)->line = NULL; | |
2673 | (*command)->control_type = continue_control; | |
2674 | (*command)->body_count = 0; | |
2675 | (*command)->body_list = NULL; | |
2676 | } | |
2677 | else | |
2678 | { | |
2679 | /* A normal command. */ | |
2680 | *command = (struct command_line *) | |
2681 | xmalloc (sizeof (struct command_line)); | |
2682 | (*command)->next = NULL; | |
2683 | (*command)->line = savestring (p, p1 - p); | |
2684 | (*command)->control_type = simple_control; | |
2685 | (*command)->body_count = 0; | |
2686 | (*command)->body_list = NULL; | |
c5aa993b | 2687 | } |
9e0b60a8 JM |
2688 | |
2689 | /* Nothing special. */ | |
2690 | return ok_command; | |
2691 | } | |
2692 | ||
2693 | /* Recursively read in the control structures and create a command_line | |
2694 | structure from them. | |
2695 | ||
2696 | The parent_control parameter is the control structure in which the | |
2697 | following commands are nested. */ | |
2698 | ||
2699 | static enum command_control_type | |
2700 | recurse_read_control_structure (current_cmd) | |
2701 | struct command_line *current_cmd; | |
2702 | { | |
2703 | int current_body, i; | |
2704 | enum misc_command_type val; | |
2705 | enum command_control_type ret; | |
2706 | struct command_line **body_ptr, *child_tail, *next; | |
2707 | ||
2708 | child_tail = NULL; | |
2709 | current_body = 1; | |
2710 | ||
2711 | /* Sanity checks. */ | |
2712 | if (current_cmd->control_type == simple_control) | |
2713 | { | |
2714 | error ("Recursed on a simple control type\n"); | |
2715 | return invalid_control; | |
2716 | } | |
2717 | ||
2718 | if (current_body > current_cmd->body_count) | |
2719 | { | |
2720 | error ("Allocated body is smaller than this command type needs\n"); | |
2721 | return invalid_control; | |
2722 | } | |
2723 | ||
2724 | /* Read lines from the input stream and build control structures. */ | |
2725 | while (1) | |
2726 | { | |
2727 | dont_repeat (); | |
2728 | ||
2729 | next = NULL; | |
2730 | val = read_next_line (&next); | |
2731 | ||
2732 | /* Just skip blanks and comments. */ | |
2733 | if (val == nop_command) | |
2734 | continue; | |
2735 | ||
2736 | if (val == end_command) | |
2737 | { | |
2738 | if (current_cmd->control_type == while_control | |
2739 | || current_cmd->control_type == if_control) | |
2740 | { | |
2741 | /* Success reading an entire control structure. */ | |
2742 | ret = simple_control; | |
2743 | break; | |
2744 | } | |
2745 | else | |
2746 | { | |
2747 | ret = invalid_control; | |
2748 | break; | |
2749 | } | |
2750 | } | |
c5aa993b | 2751 | |
9e0b60a8 JM |
2752 | /* Not the end of a control structure. */ |
2753 | if (val == else_command) | |
2754 | { | |
2755 | if (current_cmd->control_type == if_control | |
2756 | && current_body == 1) | |
2757 | { | |
2758 | realloc_body_list (current_cmd, 2); | |
2759 | current_body = 2; | |
2760 | child_tail = NULL; | |
2761 | continue; | |
2762 | } | |
2763 | else | |
2764 | { | |
2765 | ret = invalid_control; | |
2766 | break; | |
2767 | } | |
2768 | } | |
2769 | ||
2770 | if (child_tail) | |
2771 | { | |
2772 | child_tail->next = next; | |
2773 | } | |
2774 | else | |
2775 | { | |
2776 | body_ptr = current_cmd->body_list; | |
2777 | for (i = 1; i < current_body; i++) | |
2778 | body_ptr++; | |
2779 | ||
2780 | *body_ptr = next; | |
2781 | ||
2782 | } | |
2783 | ||
2784 | child_tail = next; | |
2785 | ||
2786 | /* If the latest line is another control structure, then recurse | |
c5aa993b | 2787 | on it. */ |
9e0b60a8 JM |
2788 | if (next->control_type == while_control |
2789 | || next->control_type == if_control) | |
2790 | { | |
2791 | control_level++; | |
2792 | ret = recurse_read_control_structure (next); | |
2793 | control_level--; | |
2794 | ||
2795 | if (ret != simple_control) | |
2796 | break; | |
2797 | } | |
2798 | } | |
2799 | ||
2800 | dont_repeat (); | |
2801 | ||
2802 | return ret; | |
2803 | } | |
2804 | ||
2805 | /* Read lines from the input stream and accumulate them in a chain of | |
2806 | struct command_line's, which is then returned. For input from a | |
2807 | terminal, the special command "end" is used to mark the end of the | |
2808 | input, and is not included in the returned chain of commands. */ | |
2809 | ||
2810 | #define END_MESSAGE "End with a line saying just \"end\"." | |
2811 | ||
2812 | struct command_line * | |
2813 | read_command_lines (prompt_arg, from_tty) | |
2814 | char *prompt_arg; | |
2815 | int from_tty; | |
2816 | { | |
2817 | struct command_line *head, *tail, *next; | |
2818 | struct cleanup *old_chain; | |
2819 | enum command_control_type ret; | |
2820 | enum misc_command_type val; | |
2821 | ||
c5aa993b | 2822 | control_level = 0; |
9e0b60a8 JM |
2823 | if (readline_begin_hook) |
2824 | { | |
2825 | /* Note - intentional to merge messages with no newline */ | |
2826 | (*readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); | |
2827 | } | |
2828 | else if (from_tty && input_from_terminal_p ()) | |
2829 | { | |
2830 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
2831 | gdb_flush (gdb_stdout); | |
2832 | } | |
2833 | ||
2834 | head = tail = NULL; | |
2835 | old_chain = NULL; | |
2836 | ||
2837 | while (1) | |
2838 | { | |
2839 | val = read_next_line (&next); | |
2840 | ||
2841 | /* Ignore blank lines or comments. */ | |
2842 | if (val == nop_command) | |
2843 | continue; | |
2844 | ||
2845 | if (val == end_command) | |
2846 | { | |
2847 | ret = simple_control; | |
2848 | break; | |
2849 | } | |
2850 | ||
2851 | if (val != ok_command) | |
2852 | { | |
2853 | ret = invalid_control; | |
2854 | break; | |
2855 | } | |
2856 | ||
2857 | if (next->control_type == while_control | |
2858 | || next->control_type == if_control) | |
2859 | { | |
2860 | control_level++; | |
2861 | ret = recurse_read_control_structure (next); | |
2862 | control_level--; | |
2863 | ||
2864 | if (ret == invalid_control) | |
2865 | break; | |
2866 | } | |
c5aa993b | 2867 | |
9e0b60a8 JM |
2868 | if (tail) |
2869 | { | |
2870 | tail->next = next; | |
2871 | } | |
2872 | else | |
2873 | { | |
2874 | head = next; | |
e41a3b1a | 2875 | old_chain = make_cleanup_free_command_lines (&head); |
9e0b60a8 JM |
2876 | } |
2877 | tail = next; | |
2878 | } | |
2879 | ||
2880 | dont_repeat (); | |
2881 | ||
2882 | if (head) | |
2883 | { | |
2884 | if (ret != invalid_control) | |
2885 | { | |
2886 | discard_cleanups (old_chain); | |
2887 | } | |
2888 | else | |
2889 | do_cleanups (old_chain); | |
2890 | } | |
2891 | ||
2892 | if (readline_end_hook) | |
2893 | { | |
2894 | (*readline_end_hook) (); | |
2895 | } | |
2896 | return (head); | |
2897 | } | |
2898 | ||
2899 | /* Free a chain of struct command_line's. */ | |
2900 | ||
2901 | void | |
2902 | free_command_lines (lptr) | |
c5aa993b | 2903 | struct command_line **lptr; |
9e0b60a8 JM |
2904 | { |
2905 | register struct command_line *l = *lptr; | |
2906 | register struct command_line *next; | |
2907 | struct command_line **blist; | |
2908 | int i; | |
2909 | ||
2910 | while (l) | |
2911 | { | |
2912 | if (l->body_count > 0) | |
2913 | { | |
2914 | blist = l->body_list; | |
2915 | for (i = 0; i < l->body_count; i++, blist++) | |
2916 | free_command_lines (blist); | |
2917 | } | |
2918 | next = l->next; | |
2919 | free (l->line); | |
c5aa993b | 2920 | free ((PTR) l); |
9e0b60a8 JM |
2921 | l = next; |
2922 | } | |
2923 | } | |
e41a3b1a AC |
2924 | |
2925 | static void | |
2926 | do_free_command_lines_cleanup (void *arg) | |
2927 | { | |
2928 | free_command_lines (arg); | |
2929 | } | |
2930 | ||
2931 | static struct cleanup * | |
2932 | make_cleanup_free_command_lines (struct command_line **arg) | |
2933 | { | |
2934 | return make_cleanup (do_free_command_lines_cleanup, arg); | |
2935 | } | |
9e0b60a8 JM |
2936 | \f |
2937 | /* Add an element to the list of info subcommands. */ | |
2938 | ||
56382845 | 2939 | struct cmd_list_element * |
9e0b60a8 JM |
2940 | add_info (name, fun, doc) |
2941 | char *name; | |
2942 | void (*fun) PARAMS ((char *, int)); | |
2943 | char *doc; | |
2944 | { | |
56382845 | 2945 | return add_cmd (name, no_class, fun, doc, &infolist); |
9e0b60a8 JM |
2946 | } |
2947 | ||
2948 | /* Add an alias to the list of info subcommands. */ | |
2949 | ||
56382845 | 2950 | struct cmd_list_element * |
9e0b60a8 JM |
2951 | add_info_alias (name, oldname, abbrev_flag) |
2952 | char *name; | |
2953 | char *oldname; | |
2954 | int abbrev_flag; | |
2955 | { | |
56382845 | 2956 | return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); |
9e0b60a8 JM |
2957 | } |
2958 | ||
2959 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
2960 | Therefore, its own definition is called only for "info" with no args. */ | |
2961 | ||
2962 | /* ARGSUSED */ | |
2963 | static void | |
2964 | info_command (arg, from_tty) | |
2965 | char *arg; | |
2966 | int from_tty; | |
2967 | { | |
2968 | printf_unfiltered ("\"info\" must be followed by the name of an info command.\n"); | |
2969 | help_list (infolist, "info ", -1, gdb_stdout); | |
2970 | } | |
2971 | ||
2972 | /* The "complete" command is used by Emacs to implement completion. */ | |
2973 | ||
2974 | /* ARGSUSED */ | |
2975 | static void | |
2976 | complete_command (arg, from_tty) | |
2977 | char *arg; | |
2978 | int from_tty; | |
2979 | { | |
2980 | int i; | |
2981 | int argpoint; | |
2982 | char *completion; | |
2983 | ||
2984 | dont_repeat (); | |
2985 | ||
2986 | if (arg == NULL) | |
2987 | arg = ""; | |
2988 | argpoint = strlen (arg); | |
2989 | ||
2990 | for (completion = line_completion_function (arg, i = 0, arg, argpoint); | |
2991 | completion; | |
2992 | completion = line_completion_function (arg, ++i, arg, argpoint)) | |
2993 | { | |
2994 | printf_unfiltered ("%s\n", completion); | |
2995 | free (completion); | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | /* The "show" command with no arguments shows all the settings. */ | |
3000 | ||
3001 | /* ARGSUSED */ | |
3002 | static void | |
3003 | show_command (arg, from_tty) | |
3004 | char *arg; | |
3005 | int from_tty; | |
3006 | { | |
3007 | cmd_show_list (showlist, from_tty, ""); | |
3008 | } | |
3009 | \f | |
3010 | /* Add an element to the list of commands. */ | |
3011 | ||
56382845 | 3012 | struct cmd_list_element * |
9e0b60a8 JM |
3013 | add_com (name, class, fun, doc) |
3014 | char *name; | |
3015 | enum command_class class; | |
3016 | void (*fun) PARAMS ((char *, int)); | |
3017 | char *doc; | |
3018 | { | |
56382845 | 3019 | return add_cmd (name, class, fun, doc, &cmdlist); |
9e0b60a8 JM |
3020 | } |
3021 | ||
3022 | /* Add an alias or abbreviation command to the list of commands. */ | |
3023 | ||
56382845 | 3024 | struct cmd_list_element * |
9e0b60a8 JM |
3025 | add_com_alias (name, oldname, class, abbrev_flag) |
3026 | char *name; | |
3027 | char *oldname; | |
3028 | enum command_class class; | |
3029 | int abbrev_flag; | |
3030 | { | |
56382845 | 3031 | return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); |
9e0b60a8 JM |
3032 | } |
3033 | ||
3034 | void | |
3035 | error_no_arg (why) | |
3036 | char *why; | |
3037 | { | |
3038 | error ("Argument required (%s).", why); | |
3039 | } | |
3040 | ||
3041 | /* ARGSUSED */ | |
3042 | static void | |
3043 | help_command (command, from_tty) | |
3044 | char *command; | |
c5aa993b | 3045 | int from_tty; /* Ignored */ |
9e0b60a8 JM |
3046 | { |
3047 | help_cmd (command, gdb_stdout); | |
3048 | } | |
3049 | \f | |
3050 | static void | |
3051 | validate_comname (comname) | |
3052 | char *comname; | |
3053 | { | |
3054 | register char *p; | |
3055 | ||
3056 | if (comname == 0) | |
3057 | error_no_arg ("name of command to define"); | |
3058 | ||
3059 | p = comname; | |
3060 | while (*p) | |
3061 | { | |
c5aa993b | 3062 | if (!isalnum (*p) && *p != '-' && *p != '_') |
9e0b60a8 JM |
3063 | error ("Junk in argument list: \"%s\"", p); |
3064 | p++; | |
3065 | } | |
3066 | } | |
3067 | ||
3068 | /* This is just a placeholder in the command data structures. */ | |
3069 | static void | |
3070 | user_defined_command (ignore, from_tty) | |
3071 | char *ignore; | |
3072 | int from_tty; | |
3073 | { | |
3074 | } | |
3075 | ||
3076 | static void | |
3077 | define_command (comname, from_tty) | |
3078 | char *comname; | |
3079 | int from_tty; | |
3080 | { | |
3081 | register struct command_line *cmds; | |
3082 | register struct cmd_list_element *c, *newc, *hookc = 0; | |
3083 | char *tem = comname; | |
3084 | char tmpbuf[128]; | |
3085 | #define HOOK_STRING "hook-" | |
3086 | #define HOOK_LEN 5 | |
3087 | ||
3088 | validate_comname (comname); | |
3089 | ||
3090 | /* Look it up, and verify that we got an exact match. */ | |
3091 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
3092 | if (c && !STREQ (comname, c->name)) | |
3093 | c = 0; | |
3094 | ||
3095 | if (c) | |
3096 | { | |
3097 | if (c->class == class_user || c->class == class_alias) | |
3098 | tem = "Redefine command \"%s\"? "; | |
3099 | else | |
3100 | tem = "Really redefine built-in command \"%s\"? "; | |
3101 | if (!query (tem, c->name)) | |
3102 | error ("Command \"%s\" not redefined.", c->name); | |
3103 | } | |
3104 | ||
3105 | /* If this new command is a hook, then mark the command which it | |
3106 | is hooking. Note that we allow hooking `help' commands, so that | |
3107 | we can hook the `stop' pseudo-command. */ | |
3108 | ||
3109 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
3110 | { | |
3111 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
c5aa993b | 3112 | tem = comname + HOOK_LEN; |
9e0b60a8 | 3113 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); |
c5aa993b | 3114 | if (hookc && !STREQ (comname + HOOK_LEN, hookc->name)) |
9e0b60a8 JM |
3115 | hookc = 0; |
3116 | if (!hookc) | |
3117 | { | |
3118 | warning ("Your new `%s' command does not hook any existing command.", | |
3119 | comname); | |
3120 | if (!query ("Proceed? ")) | |
3121 | error ("Not confirmed."); | |
3122 | } | |
3123 | } | |
3124 | ||
3125 | comname = savestring (comname, strlen (comname)); | |
3126 | ||
3127 | /* If the rest of the commands will be case insensitive, this one | |
3128 | should behave in the same manner. */ | |
3129 | for (tem = comname; *tem; tem++) | |
c5aa993b JM |
3130 | if (isupper (*tem)) |
3131 | *tem = tolower (*tem); | |
9e0b60a8 JM |
3132 | |
3133 | sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname); | |
3134 | cmds = read_command_lines (tmpbuf, from_tty); | |
3135 | ||
3136 | if (c && c->class == class_user) | |
3137 | free_command_lines (&c->user_commands); | |
3138 | ||
3139 | newc = add_cmd (comname, class_user, user_defined_command, | |
c5aa993b JM |
3140 | (c && c->class == class_user) |
3141 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
9e0b60a8 JM |
3142 | newc->user_commands = cmds; |
3143 | ||
3144 | /* If this new command is a hook, then mark both commands as being | |
3145 | tied. */ | |
3146 | if (hookc) | |
3147 | { | |
3148 | hookc->hook = newc; /* Target gets hooked. */ | |
3149 | newc->hookee = hookc; /* We are marked as hooking target cmd. */ | |
3150 | } | |
3151 | } | |
3152 | ||
3153 | static void | |
3154 | document_command (comname, from_tty) | |
3155 | char *comname; | |
3156 | int from_tty; | |
3157 | { | |
3158 | struct command_line *doclines; | |
3159 | register struct cmd_list_element *c; | |
3160 | char *tem = comname; | |
3161 | char tmpbuf[128]; | |
3162 | ||
3163 | validate_comname (comname); | |
3164 | ||
3165 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
3166 | ||
3167 | if (c->class != class_user) | |
3168 | error ("Command \"%s\" is built-in.", comname); | |
3169 | ||
3170 | sprintf (tmpbuf, "Type documentation for \"%s\".", comname); | |
3171 | doclines = read_command_lines (tmpbuf, from_tty); | |
3172 | ||
c5aa993b JM |
3173 | if (c->doc) |
3174 | free (c->doc); | |
9e0b60a8 JM |
3175 | |
3176 | { | |
3177 | register struct command_line *cl1; | |
3178 | register int len = 0; | |
3179 | ||
3180 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
3181 | len += strlen (cl1->line) + 1; | |
3182 | ||
3183 | c->doc = (char *) xmalloc (len + 1); | |
3184 | *c->doc = 0; | |
3185 | ||
3186 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
3187 | { | |
3188 | strcat (c->doc, cl1->line); | |
3189 | if (cl1->next) | |
3190 | strcat (c->doc, "\n"); | |
3191 | } | |
3192 | } | |
3193 | ||
3194 | free_command_lines (&doclines); | |
3195 | } | |
3196 | \f | |
3197 | /* Print the GDB banner. */ | |
3198 | void | |
3199 | print_gdb_version (stream) | |
d9fcf2fb | 3200 | struct ui_file *stream; |
9e0b60a8 JM |
3201 | { |
3202 | /* From GNU coding standards, first line is meant to be easy for a | |
3203 | program to parse, and is just canonical program name and version | |
3204 | number, which starts after last space. */ | |
3205 | ||
8b93c638 JM |
3206 | #ifdef UI_OUT |
3207 | /* Print it console style until a format is defined */ | |
3208 | fprintf_filtered (stream, "GNU gdb %s (UI_OUT)\n", version); | |
3209 | #else | |
9e0b60a8 | 3210 | fprintf_filtered (stream, "GNU gdb %s\n", version); |
8b93c638 | 3211 | #endif |
9e0b60a8 JM |
3212 | |
3213 | /* Second line is a copyright notice. */ | |
3214 | ||
107b56f0 | 3215 | fprintf_filtered (stream, "Copyright 2000 Free Software Foundation, Inc.\n"); |
9e0b60a8 JM |
3216 | |
3217 | /* Following the copyright is a brief statement that the program is | |
3218 | free software, that users are free to copy and change it on | |
3219 | certain conditions, that it is covered by the GNU GPL, and that | |
3220 | there is no warranty. */ | |
3221 | ||
3222 | fprintf_filtered (stream, "\ | |
3223 | GDB is free software, covered by the GNU General Public License, and you are\n\ | |
3224 | welcome to change it and/or distribute copies of it under certain conditions.\n\ | |
3225 | Type \"show copying\" to see the conditions.\n\ | |
3226 | There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n"); | |
3227 | ||
3228 | /* After the required info we print the configuration information. */ | |
3229 | ||
3230 | fprintf_filtered (stream, "This GDB was configured as \""); | |
3231 | if (!STREQ (host_name, target_name)) | |
3232 | { | |
3233 | fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); | |
3234 | } | |
3235 | else | |
3236 | { | |
3237 | fprintf_filtered (stream, "%s", host_name); | |
3238 | } | |
3239 | fprintf_filtered (stream, "\"."); | |
3240 | } | |
3241 | ||
3242 | /* ARGSUSED */ | |
3243 | static void | |
3244 | show_version (args, from_tty) | |
3245 | char *args; | |
3246 | int from_tty; | |
3247 | { | |
3248 | immediate_quit++; | |
3249 | print_gdb_version (gdb_stdout); | |
3250 | printf_filtered ("\n"); | |
3251 | immediate_quit--; | |
3252 | } | |
3253 | \f | |
3254 | /* get_prompt: access method for the GDB prompt string. */ | |
3255 | ||
3256 | #define MAX_PROMPT_SIZE 256 | |
3257 | ||
3258 | /* | |
3259 | * int get_prompt_1 (char * buf); | |
3260 | * | |
3261 | * Work-horse for get_prompt (called via catch_errors). | |
3262 | * Argument is buffer to hold the formatted prompt. | |
3263 | * | |
3264 | * Returns: 1 for success (use formatted prompt) | |
3265 | * 0 for failure (use gdb_prompt_string). | |
c5aa993b | 3266 | */ |
9e0b60a8 JM |
3267 | |
3268 | static int gdb_prompt_escape; | |
3269 | ||
3270 | static int | |
3271 | get_prompt_1 (formatted_prompt) | |
3272 | char *formatted_prompt; | |
3273 | { | |
3274 | char *local_prompt; | |
3275 | ||
6426a772 | 3276 | if (event_loop_p) |
9e0b60a8 JM |
3277 | local_prompt = PROMPT (0); |
3278 | else | |
3279 | local_prompt = gdb_prompt_string; | |
3280 | ||
3281 | ||
3282 | if (gdb_prompt_escape == 0) | |
3283 | { | |
c5aa993b | 3284 | return 0; /* do no formatting */ |
9e0b60a8 | 3285 | } |
c5aa993b JM |
3286 | else |
3287 | /* formatted prompt */ | |
9e0b60a8 | 3288 | { |
c5aa993b | 3289 | char fmt[40], *promptp, *outp, *tmp; |
9e0b60a8 | 3290 | value_ptr arg_val; |
c5aa993b JM |
3291 | DOUBLEST doubleval; |
3292 | LONGEST longval; | |
9e0b60a8 JM |
3293 | CORE_ADDR addrval; |
3294 | ||
3295 | int i, len; | |
3296 | struct type *arg_type, *elt_type; | |
3297 | ||
3298 | promptp = local_prompt; | |
c5aa993b | 3299 | outp = formatted_prompt; |
9e0b60a8 JM |
3300 | |
3301 | while (*promptp != '\0') | |
3302 | { | |
3303 | int available = MAX_PROMPT_SIZE - (outp - formatted_prompt) - 1; | |
3304 | ||
3305 | if (*promptp != gdb_prompt_escape) | |
3306 | { | |
c5aa993b | 3307 | if (available >= 1) /* overflow protect */ |
9e0b60a8 JM |
3308 | *outp++ = *promptp++; |
3309 | } | |
3310 | else | |
3311 | { | |
3312 | /* GDB prompt string contains escape char. Parse for arg. | |
c5aa993b JM |
3313 | Two consecutive escape chars followed by arg followed by |
3314 | a comma means to insert the arg using a default format. | |
3315 | Otherwise a printf format string may be included between | |
3316 | the two escape chars. eg: | |
3317 | %%foo, insert foo using default format | |
3318 | %2.2f%foo, insert foo using "%2.2f" format | |
3319 | A mismatch between the format string and the data type | |
3320 | of "foo" is an error (which we don't know how to protect | |
3321 | against). */ | |
9e0b60a8 JM |
3322 | |
3323 | fmt[0] = '\0'; /* assume null format string */ | |
3324 | if (promptp[1] == gdb_prompt_escape) /* double esc char */ | |
3325 | { | |
3326 | promptp += 2; /* skip past two escape chars. */ | |
3327 | } | |
3328 | else | |
3329 | { | |
3330 | /* extract format string from between two esc chars */ | |
3331 | i = 0; | |
c5aa993b JM |
3332 | do |
3333 | { | |
3334 | fmt[i++] = *promptp++; /* copy format string */ | |
3335 | } | |
3336 | while (i < sizeof (fmt) - 1 && | |
3337 | *promptp != gdb_prompt_escape && | |
3338 | *promptp != '\0'); | |
9e0b60a8 JM |
3339 | |
3340 | if (*promptp != gdb_prompt_escape) | |
3341 | error ("Syntax error at prompt position %d", | |
3342 | promptp - local_prompt); | |
3343 | else | |
3344 | { | |
3345 | promptp++; /* skip second escape char */ | |
3346 | fmt[i++] = '\0'; /* terminate the format string */ | |
3347 | } | |
3348 | } | |
3349 | ||
3350 | arg_val = parse_to_comma_and_eval (&promptp); | |
3351 | if (*promptp == ',') | |
c5aa993b | 3352 | promptp++; /* skip past the comma */ |
9e0b60a8 | 3353 | arg_type = check_typedef (VALUE_TYPE (arg_val)); |
c5aa993b | 3354 | switch (TYPE_CODE (arg_type)) |
9e0b60a8 JM |
3355 | { |
3356 | case TYPE_CODE_ARRAY: | |
3357 | elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); | |
c5aa993b | 3358 | if (TYPE_LENGTH (arg_type) > 0 && |
9e0b60a8 JM |
3359 | TYPE_LENGTH (elt_type) == 1 && |
3360 | TYPE_CODE (elt_type) == TYPE_CODE_INT) | |
3361 | { | |
3362 | int len = TYPE_LENGTH (arg_type); | |
3363 | ||
3364 | if (VALUE_LAZY (arg_val)) | |
3365 | value_fetch_lazy (arg_val); | |
3366 | tmp = VALUE_CONTENTS (arg_val); | |
3367 | ||
3368 | if (len > available) | |
c5aa993b | 3369 | len = available; /* overflow protect */ |
9e0b60a8 JM |
3370 | |
3371 | /* FIXME: how to protect GDB from crashing | |
c5aa993b | 3372 | from bad user-supplied format string? */ |
9e0b60a8 JM |
3373 | if (fmt[0] != 0) |
3374 | sprintf (outp, fmt, tmp); | |
3375 | else | |
3376 | strncpy (outp, tmp, len); | |
3377 | outp[len] = '\0'; | |
3378 | } | |
3379 | break; | |
3380 | case TYPE_CODE_PTR: | |
3381 | elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); | |
3382 | addrval = value_as_pointer (arg_val); | |
3383 | ||
3384 | if (TYPE_LENGTH (elt_type) == 1 && | |
c5aa993b | 3385 | TYPE_CODE (elt_type) == TYPE_CODE_INT && |
9e0b60a8 JM |
3386 | addrval != 0) |
3387 | { | |
3388 | /* display it as a string */ | |
3389 | char *default_fmt = "%s"; | |
3390 | char *tmp; | |
3391 | int err = 0; | |
3392 | ||
3393 | /* Limiting the number of bytes that the following call | |
c5aa993b JM |
3394 | will read protects us from sprintf overflow later. */ |
3395 | i = target_read_string (addrval, /* src */ | |
3396 | &tmp, /* dest */ | |
3397 | available, /* len */ | |
9e0b60a8 JM |
3398 | &err); |
3399 | if (err) /* read failed */ | |
3400 | error ("%s on target_read", safe_strerror (err)); | |
3401 | ||
3402 | tmp[i] = '\0'; /* force-terminate string */ | |
3403 | /* FIXME: how to protect GDB from crashing | |
c5aa993b JM |
3404 | from bad user-supplied format string? */ |
3405 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, | |
9e0b60a8 JM |
3406 | tmp); |
3407 | free (tmp); | |
3408 | } | |
3409 | else | |
3410 | { | |
3411 | /* display it as a pointer */ | |
3412 | char *default_fmt = "0x%x"; | |
3413 | ||
3414 | /* FIXME: how to protect GDB from crashing | |
c5aa993b JM |
3415 | from bad user-supplied format string? */ |
3416 | if (available >= 16 /*? */ ) /* overflow protect */ | |
9e0b60a8 JM |
3417 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
3418 | (long) addrval); | |
3419 | } | |
3420 | break; | |
3421 | case TYPE_CODE_FLT: | |
3422 | { | |
3423 | char *default_fmt = "%g"; | |
3424 | ||
3425 | doubleval = value_as_double (arg_val); | |
3426 | /* FIXME: how to protect GDB from crashing | |
3427 | from bad user-supplied format string? */ | |
c5aa993b | 3428 | if (available >= 16 /*? */ ) /* overflow protect */ |
9e0b60a8 JM |
3429 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
3430 | (double) doubleval); | |
3431 | break; | |
3432 | } | |
3433 | case TYPE_CODE_INT: | |
3434 | { | |
3435 | char *default_fmt = "%d"; | |
3436 | ||
3437 | longval = value_as_long (arg_val); | |
3438 | /* FIXME: how to protect GDB from crashing | |
3439 | from bad user-supplied format string? */ | |
c5aa993b | 3440 | if (available >= 16 /*? */ ) /* overflow protect */ |
9e0b60a8 JM |
3441 | sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
3442 | (long) longval); | |
3443 | break; | |
3444 | } | |
3445 | case TYPE_CODE_BOOL: | |
3446 | { | |
3447 | /* no default format for bool */ | |
3448 | longval = value_as_long (arg_val); | |
c5aa993b | 3449 | if (available >= 8 /*? */ ) /* overflow protect */ |
9e0b60a8 JM |
3450 | { |
3451 | if (longval) | |
3452 | strcpy (outp, "<true>"); | |
3453 | else | |
3454 | strcpy (outp, "<false>"); | |
3455 | } | |
3456 | break; | |
3457 | } | |
3458 | case TYPE_CODE_ENUM: | |
3459 | { | |
3460 | /* no default format for enum */ | |
3461 | longval = value_as_long (arg_val); | |
3462 | len = TYPE_NFIELDS (arg_type); | |
3463 | /* find enum name if possible */ | |
3464 | for (i = 0; i < len; i++) | |
3465 | if (TYPE_FIELD_BITPOS (arg_type, i) == longval) | |
c5aa993b | 3466 | break; /* match -- end loop */ |
9e0b60a8 JM |
3467 | |
3468 | if (i < len) /* enum name found */ | |
3469 | { | |
3470 | char *name = TYPE_FIELD_NAME (arg_type, i); | |
3471 | ||
3472 | strncpy (outp, name, available); | |
3473 | /* in casel available < strlen (name), */ | |
3474 | outp[available] = '\0'; | |
3475 | } | |
3476 | else | |
3477 | { | |
c5aa993b | 3478 | if (available >= 16 /*? */ ) /* overflow protect */ |
d4f3574e | 3479 | sprintf (outp, "%ld", (long) longval); |
9e0b60a8 JM |
3480 | } |
3481 | break; | |
3482 | } | |
3483 | case TYPE_CODE_VOID: | |
3484 | *outp = '\0'; | |
3485 | break; /* void type -- no output */ | |
3486 | default: | |
3487 | error ("bad data type at prompt position %d", | |
3488 | promptp - local_prompt); | |
3489 | break; | |
3490 | } | |
3491 | outp += strlen (outp); | |
3492 | } | |
3493 | } | |
3494 | *outp++ = '\0'; /* terminate prompt string */ | |
3495 | return 1; | |
3496 | } | |
3497 | } | |
3498 | ||
3499 | char * | |
3500 | get_prompt () | |
3501 | { | |
3502 | static char buf[MAX_PROMPT_SIZE]; | |
3503 | ||
c5aa993b | 3504 | if (catch_errors (get_prompt_1, buf, "bad formatted prompt: ", |
9e0b60a8 JM |
3505 | RETURN_MASK_ALL)) |
3506 | { | |
c5aa993b | 3507 | return &buf[0]; /* successful formatted prompt */ |
9e0b60a8 JM |
3508 | } |
3509 | else | |
3510 | { | |
3511 | /* Prompt could not be formatted. */ | |
6426a772 | 3512 | if (event_loop_p) |
9e0b60a8 JM |
3513 | return PROMPT (0); |
3514 | else | |
3515 | return gdb_prompt_string; | |
3516 | } | |
3517 | } | |
3518 | ||
3519 | void | |
3520 | set_prompt (s) | |
3521 | char *s; | |
3522 | { | |
3523 | /* ??rehrauer: I don't know why this fails, since it looks as though | |
3524 | assignments to prompt are wrapped in calls to savestring... | |
c5aa993b JM |
3525 | if (prompt != NULL) |
3526 | free (prompt); | |
3527 | */ | |
6426a772 | 3528 | if (event_loop_p) |
9e0b60a8 JM |
3529 | PROMPT (0) = savestring (s, strlen (s)); |
3530 | else | |
3531 | gdb_prompt_string = savestring (s, strlen (s)); | |
3532 | } | |
9e0b60a8 | 3533 | \f |
c5aa993b | 3534 | |
9e0b60a8 JM |
3535 | /* If necessary, make the user confirm that we should quit. Return |
3536 | non-zero if we should quit, zero if we shouldn't. */ | |
3537 | ||
3538 | int | |
3539 | quit_confirm () | |
3540 | { | |
3541 | if (inferior_pid != 0 && target_has_execution) | |
3542 | { | |
3543 | char *s; | |
3544 | ||
3545 | /* This is something of a hack. But there's no reliable way to | |
c5aa993b JM |
3546 | see if a GUI is running. The `use_windows' variable doesn't |
3547 | cut it. */ | |
9e0b60a8 JM |
3548 | if (init_ui_hook) |
3549 | s = "A debugging session is active.\nDo you still want to close the debugger?"; | |
3550 | else if (attach_flag) | |
3551 | s = "The program is running. Quit anyway (and detach it)? "; | |
3552 | else | |
3553 | s = "The program is running. Exit anyway? "; | |
3554 | ||
c5aa993b | 3555 | if (!query (s)) |
9e0b60a8 JM |
3556 | return 0; |
3557 | } | |
3558 | ||
3559 | return 1; | |
3560 | } | |
3561 | ||
3562 | /* Quit without asking for confirmation. */ | |
3563 | ||
3564 | void | |
3565 | quit_force (args, from_tty) | |
3566 | char *args; | |
3567 | int from_tty; | |
3568 | { | |
3569 | int exit_code = 0; | |
3570 | ||
3571 | /* An optional expression may be used to cause gdb to terminate with the | |
3572 | value of that expression. */ | |
3573 | if (args) | |
3574 | { | |
3575 | value_ptr val = parse_and_eval (args); | |
3576 | ||
3577 | exit_code = (int) value_as_long (val); | |
3578 | } | |
3579 | ||
3580 | if (inferior_pid != 0 && target_has_execution) | |
3581 | { | |
3582 | if (attach_flag) | |
3583 | target_detach (args, from_tty); | |
3584 | else | |
3585 | target_kill (); | |
3586 | } | |
3587 | ||
3588 | /* UDI wants this, to kill the TIP. */ | |
3589 | target_close (1); | |
3590 | ||
3591 | /* Save the history information if it is appropriate to do so. */ | |
3592 | if (write_history_p && history_filename) | |
3593 | write_history (history_filename); | |
3594 | ||
c5aa993b | 3595 | do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ |
9e0b60a8 JM |
3596 | |
3597 | #if defined(TUI) | |
3598 | /* tuiDo((TuiOpaqueFuncPtr)tuiCleanUp); */ | |
3599 | /* The above does not need to be inside a tuiDo(), since | |
3600 | * it is not manipulating the curses screen, but rather, | |
3601 | * it is tearing it down. | |
3602 | */ | |
3603 | if (tui_version) | |
c5aa993b | 3604 | tuiCleanUp (); |
9e0b60a8 JM |
3605 | #endif |
3606 | ||
3607 | exit (exit_code); | |
3608 | } | |
3609 | ||
3610 | /* Handle the quit command. */ | |
3611 | ||
3612 | void | |
3613 | quit_command (args, from_tty) | |
3614 | char *args; | |
3615 | int from_tty; | |
3616 | { | |
c5aa993b | 3617 | if (!quit_confirm ()) |
9e0b60a8 JM |
3618 | error ("Not confirmed."); |
3619 | quit_force (args, from_tty); | |
3620 | } | |
3621 | ||
3622 | /* Returns whether GDB is running on a terminal and whether the user | |
3623 | desires that questions be asked of them on that terminal. */ | |
3624 | ||
3625 | int | |
3626 | input_from_terminal_p () | |
3627 | { | |
3628 | return gdb_has_a_terminal () && (instream == stdin) & caution; | |
3629 | } | |
3630 | \f | |
3631 | /* ARGSUSED */ | |
3632 | static void | |
3633 | pwd_command (args, from_tty) | |
3634 | char *args; | |
3635 | int from_tty; | |
3636 | { | |
c5aa993b JM |
3637 | if (args) |
3638 | error ("The \"pwd\" command does not take an argument: %s", args); | |
9e0b60a8 JM |
3639 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
3640 | ||
3641 | if (!STREQ (gdb_dirbuf, current_directory)) | |
3642 | printf_unfiltered ("Working directory %s\n (canonically %s).\n", | |
c5aa993b | 3643 | current_directory, gdb_dirbuf); |
9e0b60a8 JM |
3644 | else |
3645 | printf_unfiltered ("Working directory %s.\n", current_directory); | |
3646 | } | |
3647 | ||
3648 | void | |
3649 | cd_command (dir, from_tty) | |
3650 | char *dir; | |
3651 | int from_tty; | |
3652 | { | |
3653 | int len; | |
3654 | /* Found something other than leading repetitions of "/..". */ | |
3655 | int found_real_path; | |
3656 | char *p; | |
3657 | ||
3658 | /* If the new directory is absolute, repeat is a no-op; if relative, | |
3659 | repeat might be useful but is more likely to be a mistake. */ | |
3660 | dont_repeat (); | |
3661 | ||
3662 | if (dir == 0) | |
3663 | error_no_arg ("new working directory"); | |
3664 | ||
3665 | dir = tilde_expand (dir); | |
3666 | make_cleanup (free, dir); | |
3667 | ||
3668 | if (chdir (dir) < 0) | |
3669 | perror_with_name (dir); | |
3670 | ||
a0b3c4fd JM |
3671 | #if defined(_WIN32) || defined(__MSDOS__) |
3672 | /* There's too much mess with DOSish names like "d:", "d:.", | |
3673 | "d:./foo" etc. Instead of having lots of special #ifdef'ed code, | |
3674 | simply get the canonicalized name of the current directory. */ | |
3675 | dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); | |
3676 | #endif | |
3677 | ||
9e0b60a8 | 3678 | len = strlen (dir); |
eb2f494a | 3679 | if (SLASH_P (dir[len - 1])) |
a0b3c4fd JM |
3680 | { |
3681 | /* Remove the trailing slash unless this is a root directory | |
eb2f494a AC |
3682 | (including a drive letter on non-Unix systems). */ |
3683 | if (!(len == 1) /* "/" */ | |
a0b3c4fd | 3684 | #if defined(_WIN32) || defined(__MSDOS__) |
eb2f494a | 3685 | && !(!SLASH_P (*dir) && ROOTED_P (dir) && len <= 3) /* "d:/" */ |
a0b3c4fd JM |
3686 | #endif |
3687 | ) | |
3688 | len--; | |
3689 | } | |
3690 | ||
3691 | dir = savestring (dir, len); | |
c5aa993b | 3692 | if (ROOTED_P (dir)) |
9e0b60a8 JM |
3693 | current_directory = dir; |
3694 | else | |
3695 | { | |
a0b3c4fd | 3696 | if (SLASH_P (current_directory[strlen (current_directory) - 1])) |
9e0b60a8 JM |
3697 | current_directory = concat (current_directory, dir, NULL); |
3698 | else | |
3699 | current_directory = concat (current_directory, SLASH_STRING, dir, NULL); | |
3700 | free (dir); | |
3701 | } | |
3702 | ||
3703 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
3704 | ||
3705 | found_real_path = 0; | |
3706 | for (p = current_directory; *p;) | |
3707 | { | |
3708 | if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2]))) | |
3709 | strcpy (p, p + 2); | |
3710 | else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.' | |
3711 | && (p[3] == 0 || SLASH_P (p[3]))) | |
3712 | { | |
3713 | if (found_real_path) | |
3714 | { | |
3715 | /* Search backwards for the directory just before the "/.." | |
c5aa993b | 3716 | and obliterate it and the "/..". */ |
9e0b60a8 | 3717 | char *q = p; |
c5aa993b | 3718 | while (q != current_directory && !SLASH_P (q[-1])) |
9e0b60a8 JM |
3719 | --q; |
3720 | ||
3721 | if (q == current_directory) | |
3722 | /* current_directory is | |
3723 | a relative pathname ("can't happen"--leave it alone). */ | |
3724 | ++p; | |
3725 | else | |
3726 | { | |
3727 | strcpy (q - 1, p + 3); | |
3728 | p = q - 1; | |
3729 | } | |
3730 | } | |
3731 | else | |
3732 | /* We are dealing with leading repetitions of "/..", for example | |
3733 | "/../..", which is the Mach super-root. */ | |
3734 | p += 3; | |
3735 | } | |
3736 | else | |
3737 | { | |
3738 | found_real_path = 1; | |
3739 | ++p; | |
3740 | } | |
3741 | } | |
3742 | ||
3743 | forget_cached_source_info (); | |
3744 | ||
3745 | if (from_tty) | |
3746 | pwd_command ((char *) 0, 1); | |
3747 | } | |
3748 | \f | |
c5aa993b JM |
3749 | struct source_cleanup_lines_args |
3750 | { | |
9e0b60a8 JM |
3751 | int old_line; |
3752 | char *old_file; | |
3753 | char *old_pre_error; | |
3754 | char *old_error_pre_print; | |
3755 | }; | |
3756 | ||
3757 | static void | |
3758 | source_cleanup_lines (args) | |
3759 | PTR args; | |
3760 | { | |
3761 | struct source_cleanup_lines_args *p = | |
c5aa993b | 3762 | (struct source_cleanup_lines_args *) args; |
9e0b60a8 JM |
3763 | source_line_number = p->old_line; |
3764 | source_file_name = p->old_file; | |
3765 | source_pre_error = p->old_pre_error; | |
3766 | error_pre_print = p->old_error_pre_print; | |
3767 | } | |
3768 | ||
3769 | /* ARGSUSED */ | |
e41a3b1a AC |
3770 | static void |
3771 | do_fclose_cleanup (void *stream) | |
3772 | { | |
3773 | fclose (stream); | |
3774 | } | |
3775 | ||
9e0b60a8 JM |
3776 | void |
3777 | source_command (args, from_tty) | |
3778 | char *args; | |
3779 | int from_tty; | |
3780 | { | |
3781 | FILE *stream; | |
3782 | struct cleanup *old_cleanups; | |
3783 | char *file = args; | |
3784 | struct source_cleanup_lines_args old_lines; | |
3785 | int needed_length; | |
3786 | ||
3787 | if (file == NULL) | |
3788 | { | |
3789 | error ("source command requires pathname of file to source."); | |
3790 | } | |
3791 | ||
3792 | file = tilde_expand (file); | |
3793 | old_cleanups = make_cleanup (free, file); | |
3794 | ||
3795 | stream = fopen (file, FOPEN_RT); | |
3796 | if (!stream) | |
3797 | { | |
3798 | if (from_tty) | |
3799 | perror_with_name (file); | |
3800 | else | |
3801 | return; | |
3802 | } | |
3803 | ||
e41a3b1a | 3804 | make_cleanup (do_fclose_cleanup, stream); |
9e0b60a8 JM |
3805 | |
3806 | old_lines.old_line = source_line_number; | |
3807 | old_lines.old_file = source_file_name; | |
3808 | old_lines.old_pre_error = source_pre_error; | |
3809 | old_lines.old_error_pre_print = error_pre_print; | |
3810 | make_cleanup (source_cleanup_lines, &old_lines); | |
3811 | source_line_number = 0; | |
3812 | source_file_name = file; | |
3813 | source_pre_error = error_pre_print == NULL ? "" : error_pre_print; | |
3814 | source_pre_error = savestring (source_pre_error, strlen (source_pre_error)); | |
3815 | make_cleanup (free, source_pre_error); | |
3816 | /* This will get set every time we read a line. So it won't stay "" for | |
3817 | long. */ | |
3818 | error_pre_print = ""; | |
3819 | ||
3820 | needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80; | |
3821 | if (source_error_allocated < needed_length) | |
3822 | { | |
3823 | source_error_allocated *= 2; | |
3824 | if (source_error_allocated < needed_length) | |
3825 | source_error_allocated = needed_length; | |
3826 | if (source_error == NULL) | |
3827 | source_error = xmalloc (source_error_allocated); | |
3828 | else | |
3829 | source_error = xrealloc (source_error, source_error_allocated); | |
3830 | } | |
3831 | ||
3832 | read_command_file (stream); | |
3833 | ||
3834 | do_cleanups (old_cleanups); | |
3835 | } | |
3836 | ||
3837 | /* ARGSUSED */ | |
3838 | static void | |
3839 | echo_command (text, from_tty) | |
3840 | char *text; | |
3841 | int from_tty; | |
3842 | { | |
3843 | char *p = text; | |
3844 | register int c; | |
3845 | ||
3846 | if (text) | |
3847 | while ((c = *p++) != '\0') | |
3848 | { | |
3849 | if (c == '\\') | |
3850 | { | |
3851 | /* \ at end of argument is used after spaces | |
3852 | so they won't be lost. */ | |
3853 | if (*p == 0) | |
3854 | return; | |
3855 | ||
3856 | c = parse_escape (&p); | |
3857 | if (c >= 0) | |
3858 | printf_filtered ("%c", c); | |
3859 | } | |
3860 | else | |
3861 | printf_filtered ("%c", c); | |
3862 | } | |
3863 | ||
3864 | /* Force this output to appear now. */ | |
3865 | wrap_here (""); | |
3866 | gdb_flush (gdb_stdout); | |
3867 | } | |
3868 | ||
3869 | /* ARGSUSED */ | |
3870 | static void | |
3871 | dont_repeat_command (ignored, from_tty) | |
3872 | char *ignored; | |
3873 | int from_tty; | |
3874 | { | |
c5aa993b JM |
3875 | *line = 0; /* Can't call dont_repeat here because we're not |
3876 | necessarily reading from stdin. */ | |
9e0b60a8 JM |
3877 | } |
3878 | \f | |
3879 | /* Functions to manipulate command line editing control variables. */ | |
3880 | ||
3881 | /* Number of commands to print in each call to show_commands. */ | |
3882 | #define Hist_print 10 | |
3883 | static void | |
3884 | show_commands (args, from_tty) | |
3885 | char *args; | |
3886 | int from_tty; | |
3887 | { | |
3888 | /* Index for history commands. Relative to history_base. */ | |
3889 | int offset; | |
3890 | ||
3891 | /* Number of the history entry which we are planning to display next. | |
3892 | Relative to history_base. */ | |
3893 | static int num = 0; | |
3894 | ||
3895 | /* The first command in the history which doesn't exist (i.e. one more | |
3896 | than the number of the last command). Relative to history_base. */ | |
3897 | int hist_len; | |
3898 | ||
a14ed312 | 3899 | extern HIST_ENTRY *history_get (int); |
9e0b60a8 JM |
3900 | |
3901 | /* Print out some of the commands from the command history. */ | |
3902 | /* First determine the length of the history list. */ | |
3903 | hist_len = history_size; | |
3904 | for (offset = 0; offset < history_size; offset++) | |
3905 | { | |
3906 | if (!history_get (history_base + offset)) | |
3907 | { | |
3908 | hist_len = offset; | |
3909 | break; | |
3910 | } | |
3911 | } | |
3912 | ||
3913 | if (args) | |
3914 | { | |
3915 | if (args[0] == '+' && args[1] == '\0') | |
3916 | /* "info editing +" should print from the stored position. */ | |
3917 | ; | |
3918 | else | |
3919 | /* "info editing <exp>" should print around command number <exp>. */ | |
3920 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; | |
3921 | } | |
3922 | /* "show commands" means print the last Hist_print commands. */ | |
3923 | else | |
3924 | { | |
3925 | num = hist_len - Hist_print; | |
3926 | } | |
3927 | ||
3928 | if (num < 0) | |
3929 | num = 0; | |
3930 | ||
3931 | /* If there are at least Hist_print commands, we want to display the last | |
3932 | Hist_print rather than, say, the last 6. */ | |
3933 | if (hist_len - num < Hist_print) | |
3934 | { | |
3935 | num = hist_len - Hist_print; | |
3936 | if (num < 0) | |
3937 | num = 0; | |
3938 | } | |
3939 | ||
3940 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
3941 | { | |
3942 | printf_filtered ("%5d %s\n", history_base + offset, | |
c5aa993b | 3943 | (history_get (history_base + offset))->line); |
9e0b60a8 JM |
3944 | } |
3945 | ||
3946 | /* The next command we want to display is the next one that we haven't | |
3947 | displayed yet. */ | |
3948 | num += Hist_print; | |
3949 | ||
3950 | /* If the user repeats this command with return, it should do what | |
3951 | "show commands +" does. This is unnecessary if arg is null, | |
3952 | because "show commands +" is not useful after "show commands". */ | |
3953 | if (from_tty && args) | |
3954 | { | |
3955 | args[0] = '+'; | |
3956 | args[1] = '\0'; | |
3957 | } | |
3958 | } | |
3959 | ||
3960 | /* Called by do_setshow_command. */ | |
3961 | /* ARGSUSED */ | |
3962 | static void | |
3963 | set_history_size_command (args, from_tty, c) | |
3964 | char *args; | |
3965 | int from_tty; | |
3966 | struct cmd_list_element *c; | |
3967 | { | |
3968 | if (history_size == INT_MAX) | |
3969 | unstifle_history (); | |
3970 | else if (history_size >= 0) | |
3971 | stifle_history (history_size); | |
3972 | else | |
3973 | { | |
3974 | history_size = INT_MAX; | |
3975 | error ("History size must be non-negative"); | |
3976 | } | |
3977 | } | |
3978 | ||
3979 | /* ARGSUSED */ | |
3980 | static void | |
3981 | set_history (args, from_tty) | |
3982 | char *args; | |
3983 | int from_tty; | |
3984 | { | |
3985 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
3986 | help_list (sethistlist, "set history ", -1, gdb_stdout); | |
3987 | } | |
3988 | ||
3989 | /* ARGSUSED */ | |
3990 | static void | |
3991 | show_history (args, from_tty) | |
3992 | char *args; | |
3993 | int from_tty; | |
3994 | { | |
3995 | cmd_show_list (showhistlist, from_tty, ""); | |
3996 | } | |
3997 | ||
3998 | int info_verbose = 0; /* Default verbose msgs off */ | |
3999 | ||
4000 | /* Called by do_setshow_command. An elaborate joke. */ | |
4001 | /* ARGSUSED */ | |
4002 | static void | |
4003 | set_verbose (args, from_tty, c) | |
4004 | char *args; | |
4005 | int from_tty; | |
4006 | struct cmd_list_element *c; | |
4007 | { | |
4008 | char *cmdname = "verbose"; | |
4009 | struct cmd_list_element *showcmd; | |
4010 | ||
4011 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); | |
4012 | ||
4013 | if (info_verbose) | |
4014 | { | |
4015 | c->doc = "Set verbose printing of informational messages."; | |
4016 | showcmd->doc = "Show verbose printing of informational messages."; | |
4017 | } | |
4018 | else | |
4019 | { | |
4020 | c->doc = "Set verbosity."; | |
4021 | showcmd->doc = "Show verbosity."; | |
4022 | } | |
4023 | } | |
4024 | ||
4025 | static void | |
4026 | float_handler (signo) | |
c5aa993b | 4027 | int signo; |
9e0b60a8 JM |
4028 | { |
4029 | /* This message is based on ANSI C, section 4.7. Note that integer | |
4030 | divide by zero causes this, so "float" is a misnomer. */ | |
4031 | signal (SIGFPE, float_handler); | |
4032 | error ("Erroneous arithmetic operation."); | |
4033 | } | |
5d161b24 DB |
4034 | |
4035 | static void | |
4036 | set_debug (arg, from_tty) | |
eb2f494a AC |
4037 | char *arg; |
4038 | int from_tty; | |
5d161b24 | 4039 | { |
eb2f494a AC |
4040 | printf_unfiltered ("\"set debug\" must be followed by the name of a print subcommand.\n"); |
4041 | help_list (setdebuglist, "set debug ", -1, gdb_stdout); | |
5d161b24 DB |
4042 | } |
4043 | ||
4044 | static void | |
4045 | show_debug (args, from_tty) | |
eb2f494a AC |
4046 | char *args; |
4047 | int from_tty; | |
5d161b24 | 4048 | { |
eb2f494a | 4049 | cmd_show_list (showdebuglist, from_tty, ""); |
5d161b24 | 4050 | } |
c5aa993b | 4051 | |
9e0b60a8 JM |
4052 | static void |
4053 | init_cmd_lists () | |
4054 | { | |
4055 | cmdlist = NULL; | |
4056 | infolist = NULL; | |
4057 | enablelist = NULL; | |
4058 | disablelist = NULL; | |
4059 | togglelist = NULL; | |
4060 | stoplist = NULL; | |
4061 | deletelist = NULL; | |
4062 | enablebreaklist = NULL; | |
4063 | setlist = NULL; | |
4064 | unsetlist = NULL; | |
4065 | showlist = NULL; | |
4066 | sethistlist = NULL; | |
4067 | showhistlist = NULL; | |
4068 | unsethistlist = NULL; | |
4069 | maintenancelist = NULL; | |
4070 | maintenanceinfolist = NULL; | |
4071 | maintenanceprintlist = NULL; | |
4072 | setprintlist = NULL; | |
4073 | showprintlist = NULL; | |
4074 | setchecklist = NULL; | |
4075 | showchecklist = NULL; | |
4076 | } | |
4077 | ||
4078 | /* Init the history buffer. Note that we are called after the init file(s) | |
4079 | * have been read so that the user can change the history file via his | |
4080 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
4081 | * overrides all of this. | |
4082 | */ | |
4083 | ||
4084 | void | |
c5aa993b | 4085 | init_history () |
9e0b60a8 JM |
4086 | { |
4087 | char *tmpenv; | |
4088 | ||
4089 | tmpenv = getenv ("HISTSIZE"); | |
4090 | if (tmpenv) | |
4091 | history_size = atoi (tmpenv); | |
4092 | else if (!history_size) | |
4093 | history_size = 256; | |
4094 | ||
4095 | stifle_history (history_size); | |
4096 | ||
4097 | tmpenv = getenv ("GDBHISTFILE"); | |
4098 | if (tmpenv) | |
c5aa993b JM |
4099 | history_filename = savestring (tmpenv, strlen (tmpenv)); |
4100 | else if (!history_filename) | |
4101 | { | |
4102 | /* We include the current directory so that if the user changes | |
4103 | directories the file written will be the same as the one | |
4104 | that was read. */ | |
a0b3c4fd | 4105 | #ifdef __MSDOS__ |
eb2f494a AC |
4106 | /* No leading dots in file names are allowed on MSDOS. */ |
4107 | history_filename = concat (current_directory, "/_gdb_history", NULL); | |
a0b3c4fd | 4108 | #else |
c5aa993b | 4109 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
a0b3c4fd | 4110 | #endif |
c5aa993b | 4111 | } |
9e0b60a8 JM |
4112 | read_history (history_filename); |
4113 | } | |
4114 | ||
4115 | static void | |
4116 | init_main () | |
4117 | { | |
4118 | struct cmd_list_element *c; | |
4119 | ||
4120 | /* If we are running the asynchronous version, | |
4121 | we initialize the prompts differently. */ | |
6426a772 | 4122 | if (!event_loop_p) |
9e0b60a8 | 4123 | { |
c5aa993b | 4124 | gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
9e0b60a8 JM |
4125 | } |
4126 | else | |
4127 | { | |
4128 | /* initialize the prompt stack to a simple "(gdb) " prompt or to | |
96baa820 | 4129 | whatever the DEFAULT_PROMPT is. */ |
9e0b60a8 | 4130 | the_prompts.top = 0; |
c5aa993b | 4131 | PREFIX (0) = ""; |
c5aa993b | 4132 | PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
c5aa993b | 4133 | SUFFIX (0) = ""; |
9e0b60a8 | 4134 | /* Set things up for annotation_level > 1, if the user ever decides |
c5aa993b | 4135 | to use it. */ |
9e0b60a8 JM |
4136 | async_annotation_suffix = "prompt"; |
4137 | /* Set the variable associated with the setshow prompt command. */ | |
4138 | new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); | |
4139 | } | |
4140 | gdb_prompt_escape = 0; /* default to none. */ | |
4141 | ||
4142 | /* Set the important stuff up for command editing. */ | |
4143 | command_editing_p = 1; | |
9e0b60a8 JM |
4144 | history_expansion_p = 0; |
4145 | write_history_p = 0; | |
4146 | ||
4147 | /* Setup important stuff for command line editing. */ | |
4148 | rl_completion_entry_function = (int (*)()) readline_line_completion_function; | |
4149 | rl_completer_word_break_characters = gdb_completer_word_break_characters; | |
4150 | rl_completer_quote_characters = gdb_completer_quote_characters; | |
4151 | rl_readline_name = "gdb"; | |
4152 | ||
4153 | /* Define the classes of commands. | |
4154 | They will appear in the help list in the reverse of this order. */ | |
4155 | ||
4156 | add_cmd ("internals", class_maintenance, NO_FUNCTION, | |
4157 | "Maintenance commands.\n\ | |
4158 | Some gdb commands are provided just for use by gdb maintainers.\n\ | |
4159 | These commands are subject to frequent change, and may not be as\n\ | |
4160 | well documented as user commands.", | |
4161 | &cmdlist); | |
4162 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); | |
4163 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); | |
4164 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ | |
4165 | The commands in this class are those defined by the user.\n\ | |
4166 | Use the \"define\" command to define a command.", &cmdlist); | |
4167 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); | |
4168 | if (!dbx_commands) | |
4169 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); | |
4170 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); | |
4171 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); | |
4172 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); | |
4173 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ | |
4174 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
4175 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
4176 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
4177 | Variable lookups are done with respect to the selected frame.\n\ | |
4178 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
4179 | The commands below can be used to select other frames by number or address.", | |
4180 | &cmdlist); | |
4181 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); | |
4182 | ||
4183 | add_com ("pwd", class_files, pwd_command, | |
c5aa993b | 4184 | "Print working directory. This is used for your program as well."); |
9e0b60a8 | 4185 | c = add_cmd ("cd", class_files, cd_command, |
c5aa993b | 4186 | "Set working directory to DIR for debugger and program being debugged.\n\ |
9e0b60a8 JM |
4187 | The change does not take effect for the program being debugged\n\ |
4188 | until the next time it is started.", &cmdlist); | |
4189 | c->completer = filename_completer; | |
4190 | ||
4191 | /* The set prompt command is different depending whether or not the | |
4192 | async version is run. NOTE: this difference is going to | |
4193 | disappear as we make the event loop be the default engine of | |
4194 | gdb. */ | |
6426a772 | 4195 | if (!event_loop_p) |
9e0b60a8 JM |
4196 | { |
4197 | add_show_from_set | |
c5aa993b | 4198 | (add_set_cmd ("prompt", class_support, var_string, |
9e0b60a8 JM |
4199 | (char *) &gdb_prompt_string, "Set gdb's prompt", |
4200 | &setlist), | |
4201 | &showlist); | |
4202 | } | |
4203 | else | |
4204 | { | |
c5aa993b JM |
4205 | c = add_set_cmd ("prompt", class_support, var_string, |
4206 | (char *) &new_async_prompt, "Set gdb's prompt", | |
9e0b60a8 JM |
4207 | &setlist); |
4208 | add_show_from_set (c, &showlist); | |
4209 | c->function.sfunc = set_async_prompt; | |
4210 | } | |
4211 | ||
4212 | add_show_from_set | |
c5aa993b | 4213 | (add_set_cmd ("prompt-escape-char", class_support, var_zinteger, |
9e0b60a8 JM |
4214 | (char *) &gdb_prompt_escape, |
4215 | "Set escape character for formatting of gdb's prompt", | |
4216 | &setlist), | |
4217 | &showlist); | |
4218 | ||
4219 | add_com ("echo", class_support, echo_command, | |
4220 | "Print a constant string. Give string as argument.\n\ | |
4221 | C escape sequences may be used in the argument.\n\ | |
4222 | No newline is added at the end of the argument;\n\ | |
4223 | use \"\\n\" if you want a newline to be printed.\n\ | |
4224 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
4225 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
4226 | to be printed or after trailing whitespace."); | |
4227 | add_com ("document", class_support, document_command, | |
4228 | "Document a user-defined command.\n\ | |
4229 | Give command name as argument. Give documentation on following lines.\n\ | |
4230 | End with a line of just \"end\"."); | |
4231 | add_com ("define", class_support, define_command, | |
4232 | "Define a new command name. Command name is argument.\n\ | |
4233 | Definition appears on following lines, one command per line.\n\ | |
4234 | End with a line of just \"end\".\n\ | |
4235 | Use the \"document\" command to give documentation for the new command.\n\ | |
4236 | Commands defined in this way may have up to ten arguments."); | |
4237 | ||
4238 | #ifdef __STDC__ | |
4239 | c = add_cmd ("source", class_support, source_command, | |
c5aa993b | 4240 | "Read commands from a file named FILE.\n\ |
9e0b60a8 JM |
4241 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ |
4242 | when gdb is started.", &cmdlist); | |
4243 | #else | |
4244 | /* Punt file name, we can't help it easily. */ | |
4245 | c = add_cmd ("source", class_support, source_command, | |
c5aa993b | 4246 | "Read commands from a file named FILE.\n\ |
9e0b60a8 JM |
4247 | Note that the file \".gdbinit\" is read automatically in this way\n\ |
4248 | when gdb is started.", &cmdlist); | |
4249 | #endif | |
4250 | c->completer = filename_completer; | |
4251 | ||
4252 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
4253 | add_com ("help", class_support, help_command, "Print list of commands."); | |
4254 | add_com_alias ("q", "quit", class_support, 1); | |
4255 | add_com_alias ("h", "help", class_support, 1); | |
4256 | ||
4257 | add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ | |
4258 | Primarily used inside of user-defined commands that should not be repeated when\n\ | |
4259 | hitting return."); | |
4260 | ||
c5aa993b | 4261 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose, |
9e0b60a8 JM |
4262 | "Set ", |
4263 | &setlist), | |
c5aa993b | 4264 | add_show_from_set (c, &showlist); |
9e0b60a8 JM |
4265 | c->function.sfunc = set_verbose; |
4266 | set_verbose (NULL, 0, c); | |
4267 | ||
4268 | /* The set editing command is different depending whether or not the | |
4269 | async version is run. NOTE: this difference is going to disappear | |
4270 | as we make the event loop be the default engine of gdb. */ | |
6426a772 | 4271 | if (!event_loop_p) |
9e0b60a8 JM |
4272 | { |
4273 | add_show_from_set | |
c5aa993b | 4274 | (add_set_cmd ("editing", class_support, var_boolean, (char *) &command_editing_p, |
9e0b60a8 JM |
4275 | "Set editing of command lines as they are typed.\n\ |
4276 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ | |
4277 | Without an argument, command line editing is enabled. To edit, use\n\ | |
4278 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), | |
4279 | &showlist); | |
4280 | } | |
4281 | else | |
4282 | { | |
c5aa993b | 4283 | c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p, |
9e0b60a8 JM |
4284 | "Set editing of command lines as they are typed.\n\ |
4285 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ | |
4286 | Without an argument, command line editing is enabled. To edit, use\n\ | |
4287 | EMACS-like or VI-like commands like control-P or ESC.", &setlist); | |
4288 | ||
4289 | add_show_from_set (c, &showlist); | |
4290 | c->function.sfunc = set_async_editing_command; | |
4291 | } | |
4292 | ||
4293 | add_prefix_cmd ("history", class_support, set_history, | |
4294 | "Generic command for setting command history parameters.", | |
4295 | &sethistlist, "set history ", 0, &setlist); | |
4296 | add_prefix_cmd ("history", class_support, show_history, | |
4297 | "Generic command for showing command history parameters.", | |
4298 | &showhistlist, "show history ", 0, &showlist); | |
4299 | ||
4300 | add_show_from_set | |
c5aa993b JM |
4301 | (add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p, |
4302 | "Set history expansion on command input.\n\ | |
9e0b60a8 JM |
4303 | Without an argument, history expansion is enabled.", &sethistlist), |
4304 | &showhistlist); | |
4305 | ||
4306 | add_show_from_set | |
c5aa993b JM |
4307 | (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p, |
4308 | "Set saving of the history record on exit.\n\ | |
9e0b60a8 JM |
4309 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
4310 | Without an argument, saving is enabled.", &sethistlist), | |
4311 | &showhistlist); | |
4312 | ||
c5aa993b | 4313 | c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size, |
9e0b60a8 JM |
4314 | "Set the size of the command history, \n\ |
4315 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
4316 | add_show_from_set (c, &showhistlist); | |
4317 | c->function.sfunc = set_history_size_command; | |
4318 | ||
4319 | add_show_from_set | |
c5aa993b JM |
4320 | (add_set_cmd ("filename", no_class, var_filename, (char *) &history_filename, |
4321 | "Set the filename in which to record the command history\n\ | |
9e0b60a8 JM |
4322 | (the list of previous commands of which a record is kept).", &sethistlist), |
4323 | &showhistlist); | |
4324 | ||
4325 | add_show_from_set | |
4326 | (add_set_cmd ("confirm", class_support, var_boolean, | |
c5aa993b | 4327 | (char *) &caution, |
9e0b60a8 JM |
4328 | "Set whether to confirm potentially dangerous operations.", |
4329 | &setlist), | |
4330 | &showlist); | |
4331 | ||
4332 | add_prefix_cmd ("info", class_info, info_command, | |
c5aa993b | 4333 | "Generic command for showing things about the program being debugged.", |
9e0b60a8 JM |
4334 | &infolist, "info ", 0, &cmdlist); |
4335 | add_com_alias ("i", "info", class_info, 1); | |
4336 | ||
4337 | add_com ("complete", class_obscure, complete_command, | |
4338 | "List the completions for the rest of the line as a command."); | |
4339 | ||
4340 | add_prefix_cmd ("show", class_info, show_command, | |
4341 | "Generic command for showing things about the debugger.", | |
4342 | &showlist, "show ", 0, &cmdlist); | |
4343 | /* Another way to get at the same thing. */ | |
4344 | add_info ("set", show_command, "Show all GDB settings."); | |
4345 | ||
4346 | add_cmd ("commands", no_class, show_commands, | |
4347 | "Show the history of commands you typed.\n\ | |
4348 | You can supply a command number to start with, or a `+' to start after\n\ | |
4349 | the previous command number shown.", | |
4350 | &showlist); | |
4351 | ||
4352 | add_cmd ("version", no_class, show_version, | |
4353 | "Show what version of GDB this is.", &showlist); | |
4354 | ||
4355 | add_com ("while", class_support, while_command, | |
c5aa993b | 4356 | "Execute nested commands WHILE the conditional expression is non zero.\n\ |
9e0b60a8 JM |
4357 | The conditional expression must follow the word `while' and must in turn be\n\ |
4358 | followed by a new line. The nested commands must be entered one per line,\n\ | |
4359 | and should be terminated by the word `end'."); | |
4360 | ||
4361 | add_com ("if", class_support, if_command, | |
c5aa993b | 4362 | "Execute nested commands once IF the conditional expression is non zero.\n\ |
9e0b60a8 JM |
4363 | The conditional expression must follow the word `if' and must in turn be\n\ |
4364 | followed by a new line. The nested commands must be entered one per line,\n\ | |
4365 | and should be terminated by the word 'else' or `end'. If an else clause\n\ | |
4366 | is used, the same rules apply to its nested commands as to the first ones."); | |
4367 | ||
4368 | /* If target is open when baud changes, it doesn't take effect until the | |
4369 | next open (I think, not sure). */ | |
4370 | add_show_from_set (add_set_cmd ("remotebaud", no_class, | |
c5aa993b | 4371 | var_zinteger, (char *) &baud_rate, |
9e0b60a8 JM |
4372 | "Set baud rate for remote serial I/O.\n\ |
4373 | This value is used to set the speed of the serial port when debugging\n\ | |
4374 | using remote targets.", &setlist), | |
4375 | &showlist); | |
4376 | ||
eb2f494a AC |
4377 | c = add_set_cmd ("remotedebug", no_class, var_zinteger, |
4378 | (char *) &remote_debug, | |
4379 | "Set debugging of remote protocol.\n\ | |
5d161b24 | 4380 | When enabled, each packet sent or received with the remote target\n\ |
eb2f494a AC |
4381 | is displayed.", &setlist); |
4382 | deprecate_cmd (c, "set debug remote"); | |
4383 | deprecate_cmd (add_show_from_set (c, &showlist), "show debug remote"); | |
5d161b24 | 4384 | |
eb2f494a AC |
4385 | add_show_from_set (add_set_cmd ("remote", no_class, var_zinteger, |
4386 | (char *) &remote_debug, | |
4387 | "Set debugging of remote protocol.\n\ | |
9e0b60a8 | 4388 | When enabled, each packet sent or received with the remote target\n\ |
5d161b24 | 4389 | is displayed.", &setdebuglist), |
eb2f494a | 4390 | &showdebuglist); |
9e0b60a8 JM |
4391 | |
4392 | add_show_from_set ( | |
c5aa993b JM |
4393 | add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout, |
4394 | "Set timeout limit to wait for target to respond.\n\ | |
9e0b60a8 JM |
4395 | This value is used to set the time limit for gdb to wait for a response\n\ |
4396 | from the target.", &setlist), | |
c5aa993b | 4397 | &showlist); |
9e0b60a8 JM |
4398 | |
4399 | /* The set annotate command is different depending whether or not | |
4400 | the async version is run. NOTE: this difference is going to | |
4401 | disappear as we make the event loop be the default engine of | |
4402 | gdb. */ | |
6426a772 | 4403 | if (!event_loop_p) |
9e0b60a8 | 4404 | { |
c5aa993b JM |
4405 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
4406 | (char *) &annotation_level, "Set annotation_level.\n\ | |
9e0b60a8 JM |
4407 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
4408 | 2 == output annotated suitably for use by programs that control GDB.", | |
4409 | &setlist); | |
4410 | c = add_show_from_set (c, &showlist); | |
4411 | } | |
4412 | else | |
4413 | { | |
c5aa993b JM |
4414 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
4415 | (char *) &annotation_level, "Set annotation_level.\n\ | |
9e0b60a8 JM |
4416 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
4417 | 2 == output annotated suitably for use by programs that control GDB.", | |
c5aa993b | 4418 | &setlist); |
9e0b60a8 JM |
4419 | add_show_from_set (c, &showlist); |
4420 | c->function.sfunc = set_async_annotation_level; | |
4421 | } | |
6426a772 | 4422 | if (event_loop_p) |
104c1213 JM |
4423 | { |
4424 | add_show_from_set | |
4425 | (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p, | |
4426 | "Set notification of completion for asynchronous execution commands.\n\ | |
4427 | Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), | |
4428 | &showlist); | |
4429 | } | |
eb2f494a AC |
4430 | add_prefix_cmd ("debug", no_class, set_debug, |
4431 | "Generic command for setting gdb debugging flags", | |
4432 | &setdebuglist, "set debug ", 0, &setlist); | |
5d161b24 | 4433 | |
eb2f494a AC |
4434 | add_prefix_cmd ("debug", no_class, show_debug, |
4435 | "Generic command for showing gdb debugging flags", | |
4436 | &showdebuglist, "show debug ", 0, &showlist); | |
9e0b60a8 | 4437 | } |