1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "call-cmds.h"
29 #include "breakpoint.h"
31 #include "expression.h"
34 #include "terminal.h" /* For job_control. */
39 /* readline include files */
40 #include <readline/readline.h>
41 #include <readline/history.h>
43 /* readline defines this. */
46 #include <sys/types.h>
49 #include "event-top.h"
50 #include "gdb_string.h"
54 /* Prototypes for local functions */
56 static void dont_repeat_command PARAMS ((char *, int));
58 static void source_cleanup_lines PARAMS ((PTR));
60 static void user_defined_command PARAMS ((char *, int));
62 static void init_signals PARAMS ((void));
65 static void stop_sig PARAMS ((int));
68 static char *line_completion_function PARAMS ((char *, int, char *, int));
70 static char *readline_line_completion_function PARAMS ((char *, int));
72 /* NOTE 1999-04-29: this function will be static again, after we make the
73 event loop be the default command loop for gdb, and we merge
74 event-top.c into this file, top.c */
75 /* static */ void command_loop_marker PARAMS ((int));
77 static void while_command PARAMS ((char *, int));
79 static void if_command PARAMS ((char *, int));
81 static struct command_line *
82 build_command_line PARAMS ((enum command_control_type, char *));
84 static struct command_line *
85 get_command_line PARAMS ((enum command_control_type, char *));
87 static void realloc_body_list PARAMS ((struct command_line *, int));
89 static enum misc_command_type read_next_line PARAMS ((struct command_line **));
91 static enum command_control_type
92 recurse_read_control_structure PARAMS ((struct command_line *));
94 static struct cleanup *setup_user_args PARAMS ((char *));
96 static char *locate_arg PARAMS ((char *));
98 static char *insert_args PARAMS ((char *));
100 static void arg_cleanup PARAMS ((void));
102 static void init_main PARAMS ((void));
104 static void init_cmd_lists PARAMS ((void));
106 static void float_handler PARAMS ((int));
108 static void init_signals PARAMS ((void));
110 static void set_verbose PARAMS ((char *, int, struct cmd_list_element *));
112 static void show_history PARAMS ((char *, int));
114 static void set_history PARAMS ((char *, int));
116 static void set_history_size_command PARAMS ((char *, int,
117 struct cmd_list_element *));
119 static void show_commands PARAMS ((char *, int));
121 static void echo_command PARAMS ((char *, int));
123 static void pwd_command PARAMS ((char *, int));
125 static void show_version PARAMS ((char *, int));
127 static void document_command PARAMS ((char *, int));
129 static void define_command PARAMS ((char *, int));
131 static void validate_comname PARAMS ((char *));
133 static void help_command PARAMS ((char *, int));
135 static void show_command PARAMS ((char *, int));
137 static void info_command PARAMS ((char *, int));
139 static void complete_command PARAMS ((char *, int));
141 static void do_nothing PARAMS ((int));
144 /* NOTE 1999-04-29: This function will be static again, once we modify
145 gdb to use the event loop as the default command loop and we merge
146 event-top.c into this file, top.c */
147 /* static */ int quit_cover PARAMS ((PTR));
149 static void disconnect PARAMS ((int));
152 static void source_cleanup PARAMS ((FILE *));
154 /* Default command line prompt. This is overriden in some configs. */
156 #ifndef DEFAULT_PROMPT
157 #define DEFAULT_PROMPT "(gdb) "
160 /* Initialization file name for gdb. This is overridden in some configs. */
162 #ifndef GDBINIT_FILENAME
163 #define GDBINIT_FILENAME ".gdbinit"
165 char gdbinit[] = GDBINIT_FILENAME;
167 int inhibit_gdbinit = 0;
169 /* If nonzero, and GDB has been configured to be able to use windows,
170 attempt to open them upon startup. */
174 extern char lang_frame_mismatch_warn[]; /* language.c */
176 /* Flag for whether we want all the "from_tty" gubbish printed. */
178 int caution = 1; /* Default is yes, sigh. */
180 /* Define all cmd_list_elements. */
182 /* Chain containing all defined commands. */
184 struct cmd_list_element *cmdlist;
186 /* Chain containing all defined info subcommands. */
188 struct cmd_list_element *infolist;
190 /* Chain containing all defined enable subcommands. */
192 struct cmd_list_element *enablelist;
194 /* Chain containing all defined disable subcommands. */
196 struct cmd_list_element *disablelist;
198 /* Chain containing all defined toggle subcommands. */
200 struct cmd_list_element *togglelist;
202 /* Chain containing all defined stop subcommands. */
204 struct cmd_list_element *stoplist;
206 /* Chain containing all defined delete subcommands. */
208 struct cmd_list_element *deletelist;
210 /* Chain containing all defined "enable breakpoint" subcommands. */
212 struct cmd_list_element *enablebreaklist;
214 /* Chain containing all defined set subcommands */
216 struct cmd_list_element *setlist;
218 /* Chain containing all defined unset subcommands */
220 struct cmd_list_element *unsetlist;
222 /* Chain containing all defined show subcommands. */
224 struct cmd_list_element *showlist;
226 /* Chain containing all defined \"set history\". */
228 struct cmd_list_element *sethistlist;
230 /* Chain containing all defined \"show history\". */
232 struct cmd_list_element *showhistlist;
234 /* Chain containing all defined \"unset history\". */
236 struct cmd_list_element *unsethistlist;
238 /* Chain containing all defined maintenance subcommands. */
240 struct cmd_list_element *maintenancelist;
242 /* Chain containing all defined "maintenance info" subcommands. */
244 struct cmd_list_element *maintenanceinfolist;
246 /* Chain containing all defined "maintenance print" subcommands. */
248 struct cmd_list_element *maintenanceprintlist;
250 struct cmd_list_element *setprintlist;
252 struct cmd_list_element *showprintlist;
254 struct cmd_list_element *setchecklist;
256 struct cmd_list_element *showchecklist;
258 /* stdio stream that command input is being read from. Set to stdin normally.
259 Set by source_command to the file we are sourcing. Set to NULL if we are
260 executing a user-defined command or interacting via a GUI. */
264 /* Current working directory. */
266 char *current_directory;
268 /* The directory name is actually stored here (usually). */
269 char gdb_dirbuf[1024];
271 /* Function to call before reading a command, if nonzero.
272 The function receives two args: an input stream,
273 and a prompt string. */
275 void (*window_hook) PARAMS ((FILE *, char *));
280 /* gdb prints this when reading a command interactively */
281 static char *gdb_prompt_string; /* the global prompt string */
282 extern char *get_prompt PARAMS ((void)); /* access function for prompt string */
284 /* Buffer used for reading command lines, and the size
285 allocated for it so far. */
290 /* Nonzero if the current command is modified by "server ". This
291 affects things like recording into the command history, comamnds
292 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
293 whatever) can issue its own commands and also send along commands
294 from the user, and have the user not notice that the user interface
295 is issuing commands too. */
298 /* Baud rate specified for talking to serial target systems. Default
299 is left as -1, so targets can choose their own defaults. */
300 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
301 or (unsigned int)-1. This is a Bad User Interface. */
305 /* Timeout limit for response from target. */
307 int remote_timeout = 20; /* Set default to 20 */
309 /* Non-zero tells remote* modules to output debugging info. */
311 int remote_debug = 0;
313 /* Non-zero means the target is running. Note: this is different from
314 saying that there is an active target and we are stopped at a
315 breakpoint, for instance. This is a real indicator whether the
316 target is off and running, which gdb is doing something else. */
317 int target_executing = 0;
319 /* Level of control structure. */
320 static int control_level;
322 /* Structure for arguments to user defined functions. */
323 #define MAXUSERARGS 10
326 struct user_args *next;
337 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
341 #define STOP_SIGNAL SIGTSTP
342 static void stop_sig PARAMS ((int));
346 /* Some System V have job control but not sigsetmask(). */
347 #if !defined (HAVE_SIGSETMASK)
349 #define HAVE_SIGSETMASK 1
351 #define HAVE_SIGSETMASK 0
355 #if 0 == (HAVE_SIGSETMASK)
356 #define sigsetmask(n)
359 /* Hooks for alternate command interfaces. */
361 /* Called after most modules have been initialized, but before taking users
364 void (*init_ui_hook) PARAMS ((char *argv0));
366 /* This hook is called from within gdb's many mini-event loops which could
367 steal control from a real user interface's event loop. It returns
368 non-zero if the user is requesting a detach, zero otherwise. */
370 int (*ui_loop_hook) PARAMS ((int));
372 /* Called instead of command_loop at top level. Can be invoked via
373 return_to_top_level. */
375 void (*command_loop_hook) PARAMS ((void));
378 /* Called instead of fputs for all output. */
380 void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, GDB_FILE * stream));
382 /* Called from print_frame_info to list the line we stopped in. */
384 void (*print_frame_info_listing_hook) PARAMS ((struct symtab * s, int line,
385 int stopline, int noerror));
386 /* Replaces most of query. */
388 int (*query_hook) PARAMS ((const char *, va_list));
390 /* Replaces most of warning. */
392 void (*warning_hook) PARAMS ((const char *, va_list));
394 /* These three functions support getting lines of text from the user. They
395 are used in sequence. First readline_begin_hook is called with a text
396 string that might be (for example) a message for the user to type in a
397 sequence of commands to be executed at a breakpoint. If this function
398 calls back to a GUI, it might take this opportunity to pop up a text
399 interaction window with this message. Next, readline_hook is called
400 with a prompt that is emitted prior to collecting the user input.
401 It can be called multiple times. Finally, readline_end_hook is called
402 to notify the GUI that we are done with the interaction window and it
405 void (*readline_begin_hook) PARAMS ((char *,...));
406 char *(*readline_hook) PARAMS ((char *));
407 void (*readline_end_hook) PARAMS ((void));
409 /* Called as appropriate to notify the interface of the specified breakpoint
412 void (*create_breakpoint_hook) PARAMS ((struct breakpoint * bpt));
413 void (*delete_breakpoint_hook) PARAMS ((struct breakpoint * bpt));
414 void (*modify_breakpoint_hook) PARAMS ((struct breakpoint * bpt));
416 /* Called as appropriate to notify the interface that we have attached
417 to or detached from an already running process. */
419 void (*attach_hook) PARAMS ((void));
420 void (*detach_hook) PARAMS ((void));
422 /* Called during long calculations to allow GUI to repair window damage, and to
423 check for stop buttons, etc... */
425 void (*interactive_hook) PARAMS ((void));
427 /* Called when the registers have changed, as a hint to a GUI
428 to minimize window update. */
430 void (*registers_changed_hook) PARAMS ((void));
432 /* Tell the GUI someone changed the register REGNO. -1 means
433 that the caller does not know which register changed or
434 that several registers have changed (see value_assign). */
435 void (*register_changed_hook) PARAMS ((int regno));
437 /* Tell the GUI someone changed LEN bytes of memory at ADDR */
438 void (*memory_changed_hook) PARAMS ((CORE_ADDR addr, int len));
440 /* Called when going to wait for the target. Usually allows the GUI to run
441 while waiting for target events. */
443 int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus * status));
445 /* Used by UI as a wrapper around command execution. May do various things
446 like enabling/disabling buttons, etc... */
448 void (*call_command_hook) PARAMS ((struct cmd_list_element * c, char *cmd,
451 /* Called after a `set' command has finished. Is only run if the
452 `set' command succeeded. */
454 void (*set_hook) PARAMS ((struct cmd_list_element *c));
456 /* Called when the current thread changes. Argument is thread id. */
458 void (*context_hook) PARAMS ((int id));
460 /* Takes control from error (). Typically used to prevent longjmps out of the
461 middle of the GUI. Usually used in conjunction with a catch routine. */
463 NORETURN void (*error_hook)
464 PARAMS ((void)) ATTR_NORETURN;
467 /* Where to go for return_to_top_level (RETURN_ERROR). */
468 SIGJMP_BUF error_return;
469 /* Where to go for return_to_top_level (RETURN_QUIT). */
470 SIGJMP_BUF quit_return;
472 /* Return for reason REASON. This generally gets back to the command
473 loop, but can be caught via catch_errors. */
476 return_to_top_level (reason)
477 enum return_reason reason;
482 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
483 I can think of a reason why that is vital, though). */
484 bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */
486 disable_current_display ();
487 do_cleanups (ALL_CLEANUPS);
488 if (event_loop_p && target_can_async_p ())
489 do_exec_cleanups (ALL_CLEANUPS);
490 if (event_loop_p && sync_execution)
491 do_exec_error_cleanups (ALL_CLEANUPS);
493 if (annotation_level > 1)
504 (NORETURN void) SIGLONGJMP
505 (reason == RETURN_ERROR ? error_return : quit_return, 1);
508 /* Call FUNC with arg ARGS, catching any errors. If there is no
509 error, return the value returned by FUNC. If there is an error,
510 print ERRSTRING, print the specific error message, then return
513 Must not be called with immediate_quit in effect (bad things might
514 happen, say we got a signal in the middle of a memcpy to quit_return).
515 This is an OK restriction; with very few exceptions immediate_quit can
516 be replaced by judicious use of QUIT.
518 MASK specifies what to catch; it is normally set to
519 RETURN_MASK_ALL, if for no other reason than that the code which
520 calls catch_errors might not be set up to deal with a quit which
521 isn't caught. But if the code can deal with it, it generally
522 should be RETURN_MASK_ERROR, unless for some reason it is more
523 useful to abort only the portion of the operation inside the
524 catch_errors. Note that quit should return to the command line
525 fairly quickly, even if some further processing is being done. */
527 /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
528 error() et.al. could maintain a set of flags that indicate the the
529 current state of each of the longjmp buffers. This would give the
530 longjmp code the chance to detect a longjmp botch (before it gets
531 to longjmperror()). Prior to 1999-11-05 this wasn't possible as
532 code also randomly used a SET_TOP_LEVEL macro that directly
533 initialize the longjmp buffers. */
535 /* MAYBE: cagney/1999-11-05: Since the SET_TOP_LEVEL macro has been
536 eliminated it is now possible to use the stack to directly store
537 each longjmp buffer. The global code would just need to update a
538 pointer (onto the stack - ulgh!?) indicating the current longjmp
539 buffers. It would certainly improve the performance of the longjmp
540 code since the memcpy's would be eliminated. */
542 /* MAYBE: cagney/1999-11-05: Should the catch_erros and cleanups code
543 be consolidated into a single file instead of being distributed
544 between utils.c and top.c? */
547 catch_errors (func, args, errstring, mask)
548 catch_errors_ftype *func;
553 SIGJMP_BUF saved_error;
554 SIGJMP_BUF saved_quit;
557 struct cleanup *saved_cleanup_chain;
558 char *saved_error_pre_print;
559 char *saved_quit_pre_print;
561 saved_cleanup_chain = save_cleanups ();
562 saved_error_pre_print = error_pre_print;
563 saved_quit_pre_print = quit_pre_print;
565 if (mask & RETURN_MASK_ERROR)
567 memcpy ((char *) saved_error, (char *) error_return, sizeof (SIGJMP_BUF));
568 error_pre_print = errstring;
570 if (mask & RETURN_MASK_QUIT)
572 memcpy (saved_quit, quit_return, sizeof (SIGJMP_BUF));
573 quit_pre_print = errstring;
576 if (SIGSETJMP (tmp_jmp) == 0)
578 if (mask & RETURN_MASK_ERROR)
579 memcpy (error_return, tmp_jmp, sizeof (SIGJMP_BUF));
580 if (mask & RETURN_MASK_QUIT)
581 memcpy (quit_return, tmp_jmp, sizeof (SIGJMP_BUF));
582 val = (*func) (args);
583 /* FIXME: cagney/1999-11-05: A correct FUNC implementaton will
584 clean things up (restoring the cleanup chain) to the state
585 they were just prior to the call. Technically, this means
586 that the below restore_cleanups call is redundant.
587 Unfortunatly, many FUNC's are not that well behaved.
588 restore_cleanups should either be replaced with a do_cleanups
589 call (to cover the problem) or an assertion check to detect
595 restore_cleanups (saved_cleanup_chain);
597 if (mask & RETURN_MASK_ERROR)
599 memcpy (error_return, saved_error, sizeof (SIGJMP_BUF));
600 error_pre_print = saved_error_pre_print;
602 if (mask & RETURN_MASK_QUIT)
604 memcpy (quit_return, saved_quit, sizeof (SIGJMP_BUF));
605 quit_pre_print = saved_quit_pre_print;
610 struct captured_command_args
612 catch_command_errors_ftype *command;
618 do_captured_command (void *data)
620 struct captured_command_args *context = data;
621 context->command (context->arg, context->from_tty);
622 /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call
623 isn't needed. Instead an assertion check could be made that
624 simply confirmed that the called function correctly cleaned up
625 after its self. Unfortunatly, old code (prior to 1999-11-04) in
626 main.c was calling SET_TOP_LEVEL(), calling the command function,
627 and then *always* calling do_cleanups(). For the moment we
628 remain ``bug compatible'' with that old code.. */
629 do_cleanups (ALL_CLEANUPS);
634 catch_command_errors (catch_command_errors_ftype *command,
635 char *arg, int from_tty, return_mask mask)
637 struct captured_command_args args;
638 args.command = command;
640 args.from_tty = from_tty;
641 return catch_errors (do_captured_command, &args, "", mask);
645 /* Handler for SIGHUP. */
652 catch_errors (quit_cover, NULL,
653 "Could not kill the program being debugged", RETURN_MASK_ALL);
654 signal (SIGHUP, SIG_DFL);
655 kill (getpid (), SIGHUP);
658 /* Just a little helper function for disconnect(). */
660 /* NOTE 1999-04-29: This function will be static again, once we modify
661 gdb to use the event loop as the default command loop and we merge
662 event-top.c into this file, top.c */
667 caution = 0; /* Throw caution to the wind -- we're exiting.
668 This prevents asking the user dumb questions. */
669 quit_command ((char *) 0, 0);
672 #endif /* defined SIGHUP */
674 /* Line number we are currently in in a file which is being sourced. */
675 /* NOTE 1999-04-29: This variable will be static again, once we modify
676 gdb to use the event loop as the default command loop and we merge
677 event-top.c into this file, top.c */
678 /* static */ int source_line_number;
680 /* Name of the file we are sourcing. */
681 /* NOTE 1999-04-29: This variable will be static again, once we modify
682 gdb to use the event loop as the default command loop and we merge
683 event-top.c into this file, top.c */
684 /* static */ char *source_file_name;
686 /* Buffer containing the error_pre_print used by the source stuff.
688 /* NOTE 1999-04-29: This variable will be static again, once we modify
689 gdb to use the event loop as the default command loop and we merge
690 event-top.c into this file, top.c */
691 /* static */ char *source_error;
692 static int source_error_allocated;
694 /* Something to glom on to the start of error_pre_print if source_file_name
696 /* NOTE 1999-04-29: This variable will be static again, once we modify
697 gdb to use the event loop as the default command loop and we merge
698 event-top.c into this file, top.c */
699 /* static */ char *source_pre_error;
701 /* Clean up on error during a "source" command (or execution of a
702 user-defined command). */
705 source_cleanup (stream)
708 /* Restore the previous input stream. */
712 /* Read commands from STREAM. */
714 read_command_file (stream)
717 struct cleanup *cleanups;
719 cleanups = make_cleanup ((make_cleanup_func) source_cleanup, instream);
722 do_cleanups (cleanups);
725 extern void init_proc PARAMS ((void));
727 void (*pre_init_ui_hook) PARAMS ((void));
733 if (pre_init_ui_hook)
736 /* Run the init function of each source file */
738 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
739 current_directory = gdb_dirbuf;
742 /* Make sure we return to the original directory upon exit, come
743 what may, since the OS doesn't do that for us. */
744 make_final_cleanup ((make_cleanup_func) chdir, strsave (current_directory));
747 init_cmd_lists (); /* This needs to be done first */
748 initialize_targets (); /* Setup target_terminal macros for utils.c */
749 initialize_utils (); /* Make errors and warnings possible */
750 initialize_all_files ();
751 initialize_current_architecture ();
752 init_main (); /* But that omits this file! Do it now */
754 /* The signal handling mechanism is different depending whether or
755 not the async version is run. NOTE: in the future we plan to make
756 the event loop be the default engine of gdb, and this difference
759 async_init_signals ();
763 /* We need a default language for parsing expressions, so simple things like
764 "set width 0" won't fail if no language is explicitly set in a config file
765 or implicitly set by reading an executable during startup. */
766 set_language (language_c);
767 expected_language = current_language; /* don't warn about the change. */
769 /* All the interpreters should have had a look at things by now.
770 Initialize the selected interpreter. */
772 init_ui_hook (argv0);
775 /* Allocate, initialize a new command line structure for one of the
776 control commands (if/while). */
778 static struct command_line *
779 build_command_line (type, args)
780 enum command_control_type type;
783 struct command_line *cmd;
786 error ("if/while commands require arguments.\n");
788 cmd = (struct command_line *) xmalloc (sizeof (struct command_line));
790 cmd->control_type = type;
794 = (struct command_line **) xmalloc (sizeof (struct command_line *)
796 memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count);
797 cmd->line = savestring (args, strlen (args));
801 /* Build and return a new command structure for the control commands
802 such as "if" and "while". */
804 static struct command_line *
805 get_command_line (type, arg)
806 enum command_control_type type;
809 struct command_line *cmd;
810 struct cleanup *old_chain = NULL;
812 /* Allocate and build a new command line structure. */
813 cmd = build_command_line (type, arg);
815 old_chain = make_cleanup ((make_cleanup_func) free_command_lines, &cmd);
817 /* Read in the body of this command. */
818 if (recurse_read_control_structure (cmd) == invalid_control)
820 warning ("error reading in control structure\n");
821 do_cleanups (old_chain);
825 discard_cleanups (old_chain);
829 /* Recursively print a command (including full control structures). */
831 print_command_line (cmd, depth, stream)
832 struct command_line *cmd;
840 for (i = 0; i < depth; i++)
841 fputs_filtered (" ", stream);
844 /* A simple command, print it and return. */
845 if (cmd->control_type == simple_control)
847 fputs_filtered (cmd->line, stream);
848 fputs_filtered ("\n", stream);
852 /* loop_continue to jump to the start of a while loop, print it
854 if (cmd->control_type == continue_control)
856 fputs_filtered ("loop_continue\n", stream);
860 /* loop_break to break out of a while loop, print it and return. */
861 if (cmd->control_type == break_control)
863 fputs_filtered ("loop_break\n", stream);
867 /* A while command. Recursively print its subcommands before returning. */
868 if (cmd->control_type == while_control)
870 struct command_line *list;
871 fputs_filtered ("while ", stream);
872 fputs_filtered (cmd->line, stream);
873 fputs_filtered ("\n", stream);
874 list = *cmd->body_list;
877 print_command_line (list, depth + 1, stream);
882 /* An if command. Recursively print both arms before returning. */
883 if (cmd->control_type == if_control)
885 fputs_filtered ("if ", stream);
886 fputs_filtered (cmd->line, stream);
887 fputs_filtered ("\n", stream);
889 print_command_line (cmd->body_list[0], depth + 1, stream);
891 /* Show the false arm if it exists. */
892 if (cmd->body_count == 2)
896 for (i = 0; i < depth; i++)
897 fputs_filtered (" ", stream);
899 fputs_filtered ("else\n", stream);
900 print_command_line (cmd->body_list[1], depth + 1, stream);
904 for (i = 0; i < depth; i++)
905 fputs_filtered (" ", stream);
907 fputs_filtered ("end\n", stream);
911 /* Execute the command in CMD. */
913 enum command_control_type
914 execute_control_command (cmd)
915 struct command_line *cmd;
917 struct expression *expr;
918 struct command_line *current;
919 struct cleanup *old_chain = 0;
923 enum command_control_type ret;
926 switch (cmd->control_type)
929 /* A simple command, execute it and return. */
930 new_line = insert_args (cmd->line);
932 return invalid_control;
933 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
935 execute_command (new_line, 0);
936 ret = cmd->control_type;
939 case continue_control:
941 /* Return for "continue", and "break" so we can either
942 continue the loop at the top, or break out. */
943 ret = cmd->control_type;
948 /* Parse the loop control expression for the while statement. */
949 new_line = insert_args (cmd->line);
951 return invalid_control;
952 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
954 expr = parse_expression (new_line);
955 make_cleanup ((make_cleanup_func) free_current_contents, &expr);
957 ret = simple_control;
960 /* Keep iterating so long as the expression is true. */
967 /* Evaluate the expression. */
968 val_mark = value_mark ();
969 val = evaluate_expression (expr);
970 cond_result = value_true (val);
971 value_free_to_mark (val_mark);
973 /* If the value is false, then break out of the loop. */
977 /* Execute the body of the while statement. */
978 current = *cmd->body_list;
981 ret = execute_control_command (current);
983 /* If we got an error, or a "break" command, then stop
985 if (ret == invalid_control || ret == break_control)
991 /* If we got a "continue" command, then restart the loop
993 if (ret == continue_control)
996 /* Get the next statement. */
997 current = current->next;
1001 /* Reset RET so that we don't recurse the break all the way down. */
1002 if (ret == break_control)
1003 ret = simple_control;
1010 new_line = insert_args (cmd->line);
1012 return invalid_control;
1013 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
1015 /* Parse the conditional for the if statement. */
1016 expr = parse_expression (new_line);
1017 make_cleanup ((make_cleanup_func) free_current_contents, &expr);
1020 ret = simple_control;
1022 /* Evaluate the conditional. */
1023 val_mark = value_mark ();
1024 val = evaluate_expression (expr);
1026 /* Choose which arm to take commands from based on the value of the
1027 conditional expression. */
1028 if (value_true (val))
1029 current = *cmd->body_list;
1030 else if (cmd->body_count == 2)
1031 current = *(cmd->body_list + 1);
1032 value_free_to_mark (val_mark);
1034 /* Execute commands in the given arm. */
1037 ret = execute_control_command (current);
1039 /* If we got an error, get out. */
1040 if (ret != simple_control)
1043 /* Get the next statement in the body. */
1044 current = current->next;
1051 warning ("Invalid control type in command structure.");
1052 return invalid_control;
1056 do_cleanups (old_chain);
1061 /* "while" command support. Executes a body of statements while the
1062 loop condition is nonzero. */
1065 while_command (arg, from_tty)
1069 struct command_line *command = NULL;
1072 command = get_command_line (while_control, arg);
1074 if (command == NULL)
1077 execute_control_command (command);
1078 free_command_lines (&command);
1081 /* "if" command support. Execute either the true or false arm depending
1082 on the value of the if conditional. */
1085 if_command (arg, from_tty)
1089 struct command_line *command = NULL;
1092 command = get_command_line (if_control, arg);
1094 if (command == NULL)
1097 execute_control_command (command);
1098 free_command_lines (&command);
1105 struct user_args *oargs = user_args;
1107 internal_error ("Internal error, arg_cleanup called with no user args.\n");
1109 user_args = user_args->next;
1113 /* Bind the incomming arguments for a user defined command to
1114 $arg0, $arg1 ... $argMAXUSERARGS. */
1116 static struct cleanup *
1120 struct user_args *args;
1121 struct cleanup *old_chain;
1122 unsigned int arg_count = 0;
1124 args = (struct user_args *) xmalloc (sizeof (struct user_args));
1125 memset (args, 0, sizeof (struct user_args));
1127 args->next = user_args;
1130 old_chain = make_cleanup ((make_cleanup_func) arg_cleanup, 0);
1142 if (arg_count >= MAXUSERARGS)
1144 error ("user defined function may only have %d arguments.\n",
1149 /* Strip whitespace. */
1150 while (*p == ' ' || *p == '\t')
1153 /* P now points to an argument. */
1155 user_args->a[arg_count].arg = p;
1157 /* Get to the end of this argument. */
1160 if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote)
1166 else if (*p == '\\')
1189 user_args->a[arg_count].len = p - start_arg;
1196 /* Given character string P, return a point to the first argument ($arg),
1197 or NULL if P contains no arguments. */
1203 while ((p = strchr (p, '$')))
1205 if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4]))
1212 /* Insert the user defined arguments stored in user_arg into the $arg
1213 arguments found in line, with the updated copy being placed into nline. */
1219 char *p, *save_line, *new_line;
1222 /* First we need to know how much memory to allocate for the new line. */
1225 while ((p = locate_arg (line)))
1230 if (i >= user_args->count)
1232 error ("Missing argument %d in user function.\n", i);
1235 len += user_args->a[i].len;
1239 /* Don't forget the tail. */
1240 len += strlen (line);
1242 /* Allocate space for the new line and fill it in. */
1243 new_line = (char *) xmalloc (len + 1);
1244 if (new_line == NULL)
1247 /* Restore pointer to beginning of old line. */
1250 /* Save pointer to beginning of new line. */
1251 save_line = new_line;
1253 while ((p = locate_arg (line)))
1257 memcpy (new_line, line, p - line);
1258 new_line += p - line;
1261 len = user_args->a[i].len;
1264 memcpy (new_line, user_args->a[i].arg, len);
1269 /* Don't forget the tail. */
1270 strcpy (new_line, line);
1272 /* Return a pointer to the beginning of the new line. */
1277 execute_user_command (c, args)
1278 struct cmd_list_element *c;
1281 register struct command_line *cmdlines;
1282 struct cleanup *old_chain;
1283 enum command_control_type ret;
1285 old_chain = setup_user_args (args);
1287 cmdlines = c->user_commands;
1292 /* Set the instream to 0, indicating execution of a
1293 user-defined function. */
1294 old_chain = make_cleanup ((make_cleanup_func) source_cleanup, instream);
1295 instream = (FILE *) 0;
1298 ret = execute_control_command (cmdlines);
1299 if (ret != simple_control && ret != break_control)
1301 warning ("Error in control structure.\n");
1304 cmdlines = cmdlines->next;
1306 do_cleanups (old_chain);
1309 /* Execute the line P as a command.
1310 Pass FROM_TTY as second argument to the defining function. */
1313 execute_command (p, from_tty)
1317 register struct cmd_list_element *c;
1318 register enum language flang;
1319 static int warned = 0;
1320 /* FIXME: These should really be in an appropriate header file */
1321 extern void serial_log_command PARAMS ((const char *));
1325 /* Force cleanup of any alloca areas if using C alloca instead of
1326 a builtin alloca. */
1329 /* This can happen when command_line_input hits end of file. */
1333 serial_log_command (p);
1335 while (*p == ' ' || *p == '\t')
1341 c = lookup_cmd (&p, cmdlist, "", 0, 1);
1343 /* If the target is running, we allow only a limited set of
1345 if (event_loop_p && target_can_async_p () && target_executing)
1346 if (!strcmp (c->name, "help")
1347 && !strcmp (c->name, "pwd")
1348 && !strcmp (c->name, "show")
1349 && !strcmp (c->name, "stop"))
1350 error ("Cannot execute this command while the target is running.");
1352 /* Pass null arg rather than an empty one. */
1355 /* Clear off trailing whitespace, except for set and complete command. */
1356 if (arg && c->type != set_cmd && c->function.cfunc != complete_command)
1358 p = arg + strlen (arg) - 1;
1359 while (p >= arg && (*p == ' ' || *p == '\t'))
1364 /* If this command has been hooked, run the hook first. */
1366 execute_user_command (c->hook, (char *) 0);
1368 if (c->class == class_user)
1369 execute_user_command (c, arg);
1370 else if (c->type == set_cmd || c->type == show_cmd)
1371 do_setshow_command (arg, from_tty & caution, c);
1372 else if (c->function.cfunc == NO_FUNCTION)
1373 error ("That is not a command, just a help topic.");
1374 else if (call_command_hook)
1375 call_command_hook (c, arg, from_tty & caution);
1377 (*c->function.cfunc) (arg, from_tty & caution);
1380 /* Tell the user if the language has changed (except first time). */
1381 if (current_language != expected_language)
1383 if (language_mode == language_mode_auto)
1385 language_info (1); /* Print what changed. */
1390 /* Warn the user if the working language does not match the
1391 language of the current frame. Only warn the user if we are
1392 actually running the program, i.e. there is a stack. */
1393 /* FIXME: This should be cacheing the frame and only running when
1394 the frame changes. */
1396 if (target_has_stack)
1398 flang = get_frame_language ();
1400 && flang != language_unknown
1401 && flang != current_language->la_language)
1403 printf_filtered ("%s\n", lang_frame_mismatch_warn);
1410 /* NOTE 1999-04-29: This function will be static again, once we modify
1411 gdb to use the event loop as the default command loop and we merge
1412 event-top.c into this file, top.c */
1414 command_loop_marker (foo)
1419 /* Read commands from `instream' and execute them
1420 until end of file or error reading instream. */
1425 struct cleanup *old_chain;
1427 int stdin_is_tty = ISATTY (stdin);
1428 long time_at_cmd_start;
1430 long space_at_cmd_start = 0;
1432 extern int display_time;
1433 extern int display_space;
1435 while (instream && !feof (instream))
1438 extern int insert_mode;
1440 if (window_hook && instream == stdin)
1441 (*window_hook) (instream, get_prompt ());
1444 if (instream == stdin && stdin_is_tty)
1445 reinitialize_more_filter ();
1446 old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0);
1449 /* A bit of paranoia: I want to make sure the "insert_mode" global
1450 * is clear except when it is being used for command-line editing
1451 * (see tuiIO.c, utils.c); otherwise normal output will
1452 * get messed up in the TUI. So clear it before/after
1453 * the command-line-input call. - RT
1457 /* Get a command-line. This calls the readline package. */
1458 command = command_line_input (instream == stdin ?
1459 get_prompt () : (char *) NULL,
1460 instream == stdin, "prompt");
1467 time_at_cmd_start = get_run_time ();
1472 extern char **environ;
1473 char *lim = (char *) sbrk (0);
1475 space_at_cmd_start = (long) (lim - (char *) &environ);
1479 execute_command (command, instream == stdin);
1480 /* Do any commands attached to breakpoint we stopped at. */
1481 bpstat_do_actions (&stop_bpstat);
1482 do_cleanups (old_chain);
1486 long cmd_time = get_run_time () - time_at_cmd_start;
1488 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1489 cmd_time / 1000000, cmd_time % 1000000);
1495 extern char **environ;
1496 char *lim = (char *) sbrk (0);
1497 long space_now = lim - (char *) &environ;
1498 long space_diff = space_now - space_at_cmd_start;
1500 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1502 (space_diff >= 0 ? '+' : '-'),
1510 /* Commands call this if they do not want to be repeated by null lines. */
1518 /* If we aren't reading from standard input, we are saving the last
1519 thing read from stdin in line and don't want to delete it. Null lines
1520 won't repeat here in any case. */
1521 if (instream == stdin)
1525 /* Read a line from the stream "instream" without command line editing.
1527 It prints PROMPT_ARG once at the start.
1528 Action is compatible with "readline", e.g. space for the result is
1529 malloc'd and should be freed by the caller.
1531 A NULL return means end of file. */
1533 gdb_readline (prompt_arg)
1538 int input_index = 0;
1539 int result_size = 80;
1543 /* Don't use a _filtered function here. It causes the assumed
1544 character position to be off, since the newline we read from
1545 the user is not accounted for. */
1546 fputs_unfiltered (prompt_arg, gdb_stdout);
1548 /* Move to a new line so the entered line doesn't have a prompt
1549 on the front of it. */
1550 fputs_unfiltered ("\n", gdb_stdout);
1552 gdb_flush (gdb_stdout);
1555 result = (char *) xmalloc (result_size);
1559 /* Read from stdin if we are executing a user defined command.
1560 This is the right thing for prompt_for_continue, at least. */
1561 c = fgetc (instream ? instream : stdin);
1565 if (input_index > 0)
1566 /* The last line does not end with a newline. Return it, and
1567 if we are called again fgetc will still return EOF and
1568 we'll return NULL then. */
1575 #ifndef CRLF_SOURCE_FILES
1579 if (input_index > 0 && result[input_index - 1] == '\r')
1585 result[input_index++] = c;
1586 while (input_index >= result_size)
1589 result = (char *) xrealloc (result, result_size);
1593 result[input_index++] = '\0';
1597 /* Variables which control command line editing and history
1598 substitution. These variables are given default values at the end
1600 static int command_editing_p;
1601 /* NOTE 1999-04-29: This variable will be static again, once we modify
1602 gdb to use the event loop as the default command loop and we merge
1603 event-top.c into this file, top.c */
1604 /* static */ int history_expansion_p;
1605 static int write_history_p;
1606 static int history_size;
1607 static char *history_filename;
1609 /* readline uses the word breaks for two things:
1610 (1) In figuring out where to point the TEXT parameter to the
1611 rl_completion_entry_function. Since we don't use TEXT for much,
1612 it doesn't matter a lot what the word breaks are for this purpose, but
1613 it does affect how much stuff M-? lists.
1614 (2) If one of the matches contains a word break character, readline
1615 will quote it. That's why we switch between
1616 gdb_completer_word_break_characters and
1617 gdb_completer_command_word_break_characters. I'm not sure when
1618 we need this behavior (perhaps for funky characters in C++ symbols?). */
1620 /* Variables which are necessary for fancy command line editing. */
1621 char *gdb_completer_word_break_characters =
1622 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1624 /* When completing on command names, we remove '-' from the list of
1625 word break characters, since we use it in command names. If the
1626 readline library sees one in any of the current completion strings,
1627 it thinks that the string needs to be quoted and automatically supplies
1629 char *gdb_completer_command_word_break_characters =
1630 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1632 /* Characters that can be used to quote completion strings. Note that we
1633 can't include '"' because the gdb C parser treats such quoted sequences
1635 char *gdb_completer_quote_characters =
1638 /* Functions that are used as part of the fancy command line editing. */
1640 /* This can be used for functions which don't want to complete on symbols
1641 but don't want to complete on anything else either. */
1644 noop_completer (text, prefix)
1651 /* Complete on filenames. */
1653 filename_completer (text, word)
1657 /* From readline. */
1658 extern char *filename_completion_function PARAMS ((char *, int));
1659 int subsequent_name;
1661 int return_val_used;
1662 int return_val_alloced;
1664 return_val_used = 0;
1665 /* Small for testing. */
1666 return_val_alloced = 1;
1667 return_val = (char **) xmalloc (return_val_alloced * sizeof (char *));
1669 subsequent_name = 0;
1673 p = filename_completion_function (text, subsequent_name);
1674 if (return_val_used >= return_val_alloced)
1676 return_val_alloced *= 2;
1678 (char **) xrealloc (return_val,
1679 return_val_alloced * sizeof (char *));
1683 return_val[return_val_used++] = p;
1686 /* Like emacs, don't complete on old versions. Especially useful
1687 in the "source" command. */
1688 if (p[strlen (p) - 1] == '~')
1694 /* Return exactly p. */
1695 return_val[return_val_used++] = p;
1696 else if (word > text)
1698 /* Return some portion of p. */
1699 q = xmalloc (strlen (p) + 5);
1700 strcpy (q, p + (word - text));
1701 return_val[return_val_used++] = q;
1706 /* Return some of TEXT plus p. */
1707 q = xmalloc (strlen (p) + (text - word) + 5);
1708 strncpy (q, word, text - word);
1709 q[text - word] = '\0';
1711 return_val[return_val_used++] = q;
1715 subsequent_name = 1;
1718 /* There is no way to do this just long enough to affect quote inserting
1719 without also affecting the next completion. This should be fixed in
1721 /* Insure that readline does the right thing
1722 with respect to inserting quotes. */
1723 rl_completer_word_break_characters = "";
1728 /* Here are some useful test cases for completion. FIXME: These should
1729 be put in the test suite. They should be tested with both M-? and TAB.
1731 "show output-" "radix"
1732 "show output" "-radix"
1733 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1734 "p " ambiguous (all symbols)
1735 "info t foo" no completions
1736 "info t " no completions
1737 "info t" ambiguous ("info target", "info terminal", etc.)
1738 "info ajksdlfk" no completions
1739 "info ajksdlfk " no completions
1741 "info " ambiguous (all info commands)
1742 "p \"a" no completions (string constant)
1743 "p 'a" ambiguous (all symbols starting with a)
1744 "p b-a" ambiguous (all symbols starting with a)
1745 "p b-" ambiguous (all symbols)
1746 "file Make" "file" (word break hard to screw up here)
1747 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1750 /* Generate completions one by one for the completer. Each time we are
1751 called return another potential completion to the caller.
1752 line_completion just completes on commands or passes the buck to the
1753 command's completer function, the stuff specific to symbol completion
1754 is in make_symbol_completion_list.
1756 TEXT is the caller's idea of the "word" we are looking at.
1758 MATCHES is the number of matches that have currently been collected from
1759 calling this completion function. When zero, then we need to initialize,
1760 otherwise the initialization has already taken place and we can just
1761 return the next potential completion string.
1763 LINE_BUFFER is available to be looked at; it contains the entire text
1764 of the line. POINT is the offset in that line of the cursor. You
1765 should pretend that the line ends at POINT.
1767 Returns NULL if there are no more completions, else a pointer to a string
1768 which is a possible completion, it is the caller's responsibility to
1772 line_completion_function (text, matches, line_buffer, point)
1778 static char **list = (char **) NULL; /* Cache of completions */
1779 static int index; /* Next cached completion */
1780 char *output = NULL;
1781 char *tmp_command, *p;
1782 /* Pointer within tmp_command which corresponds to text. */
1784 struct cmd_list_element *c, *result_list;
1788 /* The caller is beginning to accumulate a new set of completions, so
1789 we need to find all of them now, and cache them for returning one at
1790 a time on future calls. */
1794 /* Free the storage used by LIST, but not by the strings inside.
1795 This is because rl_complete_internal () frees the strings. */
1801 /* Choose the default set of word break characters to break completions.
1802 If we later find out that we are doing completions on command strings
1803 (as opposed to strings supplied by the individual command completer
1804 functions, which can be any string) then we will switch to the
1805 special word break set for command strings, which leaves out the
1806 '-' character used in some commands. */
1808 rl_completer_word_break_characters =
1809 gdb_completer_word_break_characters;
1811 /* Decide whether to complete on a list of gdb commands or on symbols. */
1812 tmp_command = (char *) alloca (point + 1);
1815 strncpy (tmp_command, line_buffer, point);
1816 tmp_command[point] = '\0';
1817 /* Since text always contains some number of characters leading up
1818 to point, we can find the equivalent position in tmp_command
1819 by subtracting that many characters from the end of tmp_command. */
1820 word = tmp_command + point - strlen (text);
1824 /* An empty line we want to consider ambiguous; that is, it
1825 could be any command. */
1826 c = (struct cmd_list_element *) -1;
1831 c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
1834 /* Move p up to the next interesting thing. */
1835 while (*p == ' ' || *p == '\t')
1842 /* It is an unrecognized command. So there are no
1843 possible completions. */
1846 else if (c == (struct cmd_list_element *) -1)
1850 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1851 doesn't advance over that thing itself. Do so now. */
1853 while (*q && (isalnum (*q) || *q == '-' || *q == '_'))
1855 if (q != tmp_command + point)
1857 /* There is something beyond the ambiguous
1858 command, so there are no possible completions. For
1859 example, "info t " or "info t foo" does not complete
1860 to anything, because "info t" can be "info target" or
1866 /* We're trying to complete on the command which was ambiguous.
1867 This we can deal with. */
1870 list = complete_on_cmdlist (*result_list->prefixlist, p,
1875 list = complete_on_cmdlist (cmdlist, p, word);
1877 /* Insure that readline does the right thing with respect to
1878 inserting quotes. */
1879 rl_completer_word_break_characters =
1880 gdb_completer_command_word_break_characters;
1885 /* We've recognized a full command. */
1887 if (p == tmp_command + point)
1889 /* There is no non-whitespace in the line beyond the command. */
1891 if (p[-1] == ' ' || p[-1] == '\t')
1893 /* The command is followed by whitespace; we need to complete
1894 on whatever comes after command. */
1897 /* It is a prefix command; what comes after it is
1898 a subcommand (e.g. "info "). */
1899 list = complete_on_cmdlist (*c->prefixlist, p, word);
1901 /* Insure that readline does the right thing
1902 with respect to inserting quotes. */
1903 rl_completer_word_break_characters =
1904 gdb_completer_command_word_break_characters;
1908 list = complete_on_enum (c->enums, p, word);
1909 rl_completer_word_break_characters =
1910 gdb_completer_command_word_break_characters;
1914 /* It is a normal command; what comes after it is
1915 completed by the command's completer function. */
1916 list = (*c->completer) (p, word);
1921 /* The command is not followed by whitespace; we need to
1922 complete on the command itself. e.g. "p" which is a
1923 command itself but also can complete to "print", "ptype"
1927 /* Find the command we are completing on. */
1929 while (q > tmp_command)
1931 if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_')
1937 list = complete_on_cmdlist (result_list, q, word);
1939 /* Insure that readline does the right thing
1940 with respect to inserting quotes. */
1941 rl_completer_word_break_characters =
1942 gdb_completer_command_word_break_characters;
1947 /* There is non-whitespace beyond the command. */
1949 if (c->prefixlist && !c->allow_unknown)
1951 /* It is an unrecognized subcommand of a prefix command,
1952 e.g. "info adsfkdj". */
1957 list = complete_on_enum (c->enums, p, word);
1961 /* It is a normal command. */
1962 list = (*c->completer) (p, word);
1968 /* If we found a list of potential completions during initialization then
1969 dole them out one at a time. The vector of completions is NULL
1970 terminated, so after returning the last one, return NULL (and continue
1971 to do so) each time we are called after that, until a new list is
1976 output = list[index];
1984 /* Can't do this because readline hasn't yet checked the word breaks
1985 for figuring out whether to insert a quote. */
1987 /* Make sure the word break characters are set back to normal for the
1988 next time that readline tries to complete something. */
1989 rl_completer_word_break_characters =
1990 gdb_completer_word_break_characters;
1996 /* Line completion interface function for readline. */
1999 readline_line_completion_function (text, matches)
2003 return line_completion_function (text, matches, rl_line_buffer, rl_point);
2006 /* Skip over a possibly quoted word (as defined by the quote characters
2007 and word break characters the completer uses). Returns pointer to the
2008 location after the "word". */
2014 char quote_char = '\0';
2017 for (scan = str; *scan != '\0'; scan++)
2019 if (quote_char != '\0')
2021 /* Ignore everything until the matching close quote char */
2022 if (*scan == quote_char)
2024 /* Found matching close quote. */
2029 else if (strchr (gdb_completer_quote_characters, *scan))
2031 /* Found start of a quoted string. */
2034 else if (strchr (gdb_completer_word_break_characters, *scan))
2048 #if STOP_SIGNAL == SIGTSTP
2049 signal (SIGTSTP, SIG_DFL);
2051 kill (getpid (), SIGTSTP);
2052 signal (SIGTSTP, stop_sig);
2054 signal (STOP_SIGNAL, stop_sig);
2056 printf_unfiltered ("%s", get_prompt ());
2057 gdb_flush (gdb_stdout);
2059 /* Forget about any previous command -- null line now will do nothing. */
2062 #endif /* STOP_SIGNAL */
2064 /* Initialize signal handlers. */
2069 /* Under System V the default disposition of a signal is reinstated after
2070 the signal is caught and delivered to an application process. On such
2071 systems one must restore the replacement signal handler if one wishes
2072 to continue handling the signal in one's program. On BSD systems this
2073 is not needed but it is harmless, and it simplifies the code to just do
2074 it unconditionally. */
2075 signal (signo, do_nothing);
2081 signal (SIGINT, request_quit);
2083 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
2084 to the inferior and breakpoints will be ignored. */
2086 signal (SIGTRAP, SIG_DFL);
2089 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
2090 passed to the inferior, which we don't want. It would be
2091 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
2092 on BSD4.3 systems using vfork, that can affect the
2093 GDB process as well as the inferior (the signal handling tables
2094 might be in memory, shared between the two). Since we establish
2095 a handler for SIGQUIT, when we call exec it will set the signal
2096 to SIG_DFL for us. */
2097 signal (SIGQUIT, do_nothing);
2099 if (signal (SIGHUP, do_nothing) != SIG_IGN)
2100 signal (SIGHUP, disconnect);
2102 signal (SIGFPE, float_handler);
2104 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
2105 signal (SIGWINCH, SIGWINCH_HANDLER);
2109 /* Read one line from the command input stream `instream'
2110 into the local static buffer `linebuffer' (whose current length
2112 The buffer is made bigger as necessary.
2113 Returns the address of the start of the line.
2115 NULL is returned for end of file.
2117 *If* the instream == stdin & stdin is a terminal, the line read
2118 is copied into the file line saver (global var char *line,
2119 length linesize) so that it can be duplicated.
2121 This routine either uses fancy command line editing or
2122 simple input as the user has requested. */
2125 command_line_input (prompt_arg, repeat, annotation_suffix)
2128 char *annotation_suffix;
2130 static char *linebuffer = 0;
2131 static unsigned linelength = 0;
2135 char *local_prompt = prompt_arg;
2139 /* The annotation suffix must be non-NULL. */
2140 if (annotation_suffix == NULL)
2141 annotation_suffix = "";
2143 if (annotation_level > 1 && instream == stdin)
2145 local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg))
2146 + strlen (annotation_suffix) + 40);
2147 if (prompt_arg == NULL)
2148 local_prompt[0] = '\0';
2150 strcpy (local_prompt, prompt_arg);
2151 strcat (local_prompt, "\n\032\032");
2152 strcat (local_prompt, annotation_suffix);
2153 strcat (local_prompt, "\n");
2156 if (linebuffer == 0)
2159 linebuffer = (char *) xmalloc (linelength);
2164 /* Control-C quits instantly if typed while in this loop
2165 since it should not wait until the user types a newline. */
2171 signal (STOP_SIGNAL, handle_stop_sig);
2173 signal (STOP_SIGNAL, stop_sig);
2179 /* Make sure that all output has been output. Some machines may let
2180 you get away with leaving out some of the gdb_flush, but not all. */
2182 gdb_flush (gdb_stdout);
2183 gdb_flush (gdb_stderr);
2185 if (source_file_name != NULL)
2187 ++source_line_number;
2188 sprintf (source_error,
2189 "%s%s:%d: Error in sourced command file:\n",
2192 source_line_number);
2193 error_pre_print = source_error;
2196 if (annotation_level > 1 && instream == stdin)
2198 printf_unfiltered ("\n\032\032pre-");
2199 printf_unfiltered (annotation_suffix);
2200 printf_unfiltered ("\n");
2203 /* Don't use fancy stuff if not talking to stdin. */
2204 if (readline_hook && instream == NULL)
2206 rl = (*readline_hook) (local_prompt);
2208 else if (command_editing_p && instream == stdin && ISATTY (instream))
2210 rl = readline (local_prompt);
2214 rl = gdb_readline (local_prompt);
2217 if (annotation_level > 1 && instream == stdin)
2219 printf_unfiltered ("\n\032\032post-");
2220 printf_unfiltered (annotation_suffix);
2221 printf_unfiltered ("\n");
2224 if (!rl || rl == (char *) EOF)
2229 if (strlen (rl) + 1 + (p - linebuffer) > linelength)
2231 linelength = strlen (rl) + 1 + (p - linebuffer);
2232 nline = (char *) xrealloc (linebuffer, linelength);
2233 p += nline - linebuffer;
2237 /* Copy line. Don't copy null at end. (Leaves line alone
2238 if this was just a newline) */
2242 free (rl); /* Allocated in readline. */
2244 if (p == linebuffer || *(p - 1) != '\\')
2247 p--; /* Put on top of '\'. */
2248 local_prompt = (char *) 0;
2253 signal (STOP_SIGNAL, SIG_DFL);
2260 #define SERVER_COMMAND_LENGTH 7
2262 (p - linebuffer > SERVER_COMMAND_LENGTH)
2263 && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH);
2266 /* Note that we don't set `line'. Between this and the check in
2267 dont_repeat, this insures that repeating will still do the
2270 return linebuffer + SERVER_COMMAND_LENGTH;
2273 /* Do history expansion if that is wished. */
2274 if (history_expansion_p && instream == stdin
2275 && ISATTY (instream))
2277 char *history_value;
2280 *p = '\0'; /* Insert null now. */
2281 expanded = history_expand (linebuffer, &history_value);
2284 /* Print the changes. */
2285 printf_unfiltered ("%s\n", history_value);
2287 /* If there was an error, call this function again. */
2290 free (history_value);
2291 return command_line_input (prompt_arg, repeat, annotation_suffix);
2293 if (strlen (history_value) > linelength)
2295 linelength = strlen (history_value) + 1;
2296 linebuffer = (char *) xrealloc (linebuffer, linelength);
2298 strcpy (linebuffer, history_value);
2299 p = linebuffer + strlen (linebuffer);
2300 free (history_value);
2304 /* If we just got an empty line, and that is supposed
2305 to repeat the previous command, return the value in the
2307 if (repeat && p == linebuffer)
2309 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
2315 /* Add line to history if appropriate. */
2316 if (instream == stdin
2317 && ISATTY (stdin) && *linebuffer)
2318 add_history (linebuffer);
2320 /* Note: lines consisting solely of comments are added to the command
2321 history. This is useful when you type a command, and then
2322 realize you don't want to execute it quite yet. You can comment
2323 out the command and then later fetch it from the value history
2324 and remove the '#'. The kill ring is probably better, but some
2325 people are in the habit of commenting things out. */
2327 *p1 = '\0'; /* Found a comment. */
2329 /* Save into global buffer if appropriate. */
2332 if (linelength > linesize)
2334 line = xrealloc (line, linelength);
2335 linesize = linelength;
2337 strcpy (line, linebuffer);
2345 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2346 code bodies. This is typically used when we encounter an "else"
2347 clause for an "if" command. */
2350 realloc_body_list (command, new_length)
2351 struct command_line *command;
2355 struct command_line **body_list;
2357 n = command->body_count;
2359 /* Nothing to do? */
2360 if (new_length <= n)
2363 body_list = (struct command_line **)
2364 xmalloc (sizeof (struct command_line *) * new_length);
2366 memcpy (body_list, command->body_list, sizeof (struct command_line *) * n);
2368 free (command->body_list);
2369 command->body_list = body_list;
2370 command->body_count = new_length;
2373 /* Read one line from the input stream. If the command is an "else" or
2374 "end", return such an indication to the caller. */
2376 static enum misc_command_type
2377 read_next_line (command)
2378 struct command_line **command;
2380 char *p, *p1, *prompt_ptr, control_prompt[256];
2383 if (control_level >= 254)
2384 error ("Control nesting too deep!\n");
2386 /* Set a prompt based on the nesting of the control commands. */
2387 if (instream == stdin || (instream == 0 && readline_hook != NULL))
2389 for (i = 0; i < control_level; i++)
2390 control_prompt[i] = ' ';
2391 control_prompt[i] = '>';
2392 control_prompt[i + 1] = '\0';
2393 prompt_ptr = (char *) &control_prompt[0];
2398 p = command_line_input (prompt_ptr, instream == stdin, "commands");
2400 /* Not sure what to do here. */
2404 /* Strip leading and trailing whitespace. */
2405 while (*p == ' ' || *p == '\t')
2408 p1 = p + strlen (p);
2409 while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t'))
2412 /* Blanks and comments don't really do anything, but we need to
2413 distinguish them from else, end and other commands which can be
2415 if (p1 == p || p[0] == '#')
2418 /* Is this the end of a simple, while, or if control structure? */
2419 if (p1 - p == 3 && !strncmp (p, "end", 3))
2422 /* Is the else clause of an if control structure? */
2423 if (p1 - p == 4 && !strncmp (p, "else", 4))
2424 return else_command;
2426 /* Check for while, if, break, continue, etc and build a new command
2427 line structure for them. */
2428 if (p1 - p > 5 && !strncmp (p, "while", 5))
2429 *command = build_command_line (while_control, p + 6);
2430 else if (p1 - p > 2 && !strncmp (p, "if", 2))
2431 *command = build_command_line (if_control, p + 3);
2432 else if (p1 - p == 10 && !strncmp (p, "loop_break", 10))
2434 *command = (struct command_line *)
2435 xmalloc (sizeof (struct command_line));
2436 (*command)->next = NULL;
2437 (*command)->line = NULL;
2438 (*command)->control_type = break_control;
2439 (*command)->body_count = 0;
2440 (*command)->body_list = NULL;
2442 else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13))
2444 *command = (struct command_line *)
2445 xmalloc (sizeof (struct command_line));
2446 (*command)->next = NULL;
2447 (*command)->line = NULL;
2448 (*command)->control_type = continue_control;
2449 (*command)->body_count = 0;
2450 (*command)->body_list = NULL;
2454 /* A normal command. */
2455 *command = (struct command_line *)
2456 xmalloc (sizeof (struct command_line));
2457 (*command)->next = NULL;
2458 (*command)->line = savestring (p, p1 - p);
2459 (*command)->control_type = simple_control;
2460 (*command)->body_count = 0;
2461 (*command)->body_list = NULL;
2464 /* Nothing special. */
2468 /* Recursively read in the control structures and create a command_line
2469 structure from them.
2471 The parent_control parameter is the control structure in which the
2472 following commands are nested. */
2474 static enum command_control_type
2475 recurse_read_control_structure (current_cmd)
2476 struct command_line *current_cmd;
2478 int current_body, i;
2479 enum misc_command_type val;
2480 enum command_control_type ret;
2481 struct command_line **body_ptr, *child_tail, *next;
2486 /* Sanity checks. */
2487 if (current_cmd->control_type == simple_control)
2489 error ("Recursed on a simple control type\n");
2490 return invalid_control;
2493 if (current_body > current_cmd->body_count)
2495 error ("Allocated body is smaller than this command type needs\n");
2496 return invalid_control;
2499 /* Read lines from the input stream and build control structures. */
2505 val = read_next_line (&next);
2507 /* Just skip blanks and comments. */
2508 if (val == nop_command)
2511 if (val == end_command)
2513 if (current_cmd->control_type == while_control
2514 || current_cmd->control_type == if_control)
2516 /* Success reading an entire control structure. */
2517 ret = simple_control;
2522 ret = invalid_control;
2527 /* Not the end of a control structure. */
2528 if (val == else_command)
2530 if (current_cmd->control_type == if_control
2531 && current_body == 1)
2533 realloc_body_list (current_cmd, 2);
2540 ret = invalid_control;
2547 child_tail->next = next;
2551 body_ptr = current_cmd->body_list;
2552 for (i = 1; i < current_body; i++)
2561 /* If the latest line is another control structure, then recurse
2563 if (next->control_type == while_control
2564 || next->control_type == if_control)
2567 ret = recurse_read_control_structure (next);
2570 if (ret != simple_control)
2580 /* Read lines from the input stream and accumulate them in a chain of
2581 struct command_line's, which is then returned. For input from a
2582 terminal, the special command "end" is used to mark the end of the
2583 input, and is not included in the returned chain of commands. */
2585 #define END_MESSAGE "End with a line saying just \"end\"."
2587 struct command_line *
2588 read_command_lines (prompt_arg, from_tty)
2592 struct command_line *head, *tail, *next;
2593 struct cleanup *old_chain;
2594 enum command_control_type ret;
2595 enum misc_command_type val;
2598 if (readline_begin_hook)
2600 /* Note - intentional to merge messages with no newline */
2601 (*readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE);
2603 else if (from_tty && input_from_terminal_p ())
2605 printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE);
2606 gdb_flush (gdb_stdout);
2614 val = read_next_line (&next);
2616 /* Ignore blank lines or comments. */
2617 if (val == nop_command)
2620 if (val == end_command)
2622 ret = simple_control;
2626 if (val != ok_command)
2628 ret = invalid_control;
2632 if (next->control_type == while_control
2633 || next->control_type == if_control)
2636 ret = recurse_read_control_structure (next);
2639 if (ret == invalid_control)
2650 old_chain = make_cleanup ((make_cleanup_func) free_command_lines,
2660 if (ret != invalid_control)
2662 discard_cleanups (old_chain);
2665 do_cleanups (old_chain);
2668 if (readline_end_hook)
2670 (*readline_end_hook) ();
2675 /* Free a chain of struct command_line's. */
2678 free_command_lines (lptr)
2679 struct command_line **lptr;
2681 register struct command_line *l = *lptr;
2682 register struct command_line *next;
2683 struct command_line **blist;
2688 if (l->body_count > 0)
2690 blist = l->body_list;
2691 for (i = 0; i < l->body_count; i++, blist++)
2692 free_command_lines (blist);
2701 /* Add an element to the list of info subcommands. */
2704 add_info (name, fun, doc)
2706 void (*fun) PARAMS ((char *, int));
2709 add_cmd (name, no_class, fun, doc, &infolist);
2712 /* Add an alias to the list of info subcommands. */
2715 add_info_alias (name, oldname, abbrev_flag)
2720 add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
2723 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2724 Therefore, its own definition is called only for "info" with no args. */
2728 info_command (arg, from_tty)
2732 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2733 help_list (infolist, "info ", -1, gdb_stdout);
2736 /* The "complete" command is used by Emacs to implement completion. */
2740 complete_command (arg, from_tty)
2752 argpoint = strlen (arg);
2754 for (completion = line_completion_function (arg, i = 0, arg, argpoint);
2756 completion = line_completion_function (arg, ++i, arg, argpoint))
2758 printf_unfiltered ("%s\n", completion);
2763 /* The "show" command with no arguments shows all the settings. */
2767 show_command (arg, from_tty)
2771 cmd_show_list (showlist, from_tty, "");
2774 /* Add an element to the list of commands. */
2777 add_com (name, class, fun, doc)
2779 enum command_class class;
2780 void (*fun) PARAMS ((char *, int));
2783 add_cmd (name, class, fun, doc, &cmdlist);
2786 /* Add an alias or abbreviation command to the list of commands. */
2789 add_com_alias (name, oldname, class, abbrev_flag)
2792 enum command_class class;
2795 add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
2802 error ("Argument required (%s).", why);
2807 help_command (command, from_tty)
2809 int from_tty; /* Ignored */
2811 help_cmd (command, gdb_stdout);
2815 validate_comname (comname)
2821 error_no_arg ("name of command to define");
2826 if (!isalnum (*p) && *p != '-' && *p != '_')
2827 error ("Junk in argument list: \"%s\"", p);
2832 /* This is just a placeholder in the command data structures. */
2834 user_defined_command (ignore, from_tty)
2841 define_command (comname, from_tty)
2845 register struct command_line *cmds;
2846 register struct cmd_list_element *c, *newc, *hookc = 0;
2847 char *tem = comname;
2849 #define HOOK_STRING "hook-"
2852 validate_comname (comname);
2854 /* Look it up, and verify that we got an exact match. */
2855 c = lookup_cmd (&tem, cmdlist, "", -1, 1);
2856 if (c && !STREQ (comname, c->name))
2861 if (c->class == class_user || c->class == class_alias)
2862 tem = "Redefine command \"%s\"? ";
2864 tem = "Really redefine built-in command \"%s\"? ";
2865 if (!query (tem, c->name))
2866 error ("Command \"%s\" not redefined.", c->name);
2869 /* If this new command is a hook, then mark the command which it
2870 is hooking. Note that we allow hooking `help' commands, so that
2871 we can hook the `stop' pseudo-command. */
2873 if (!strncmp (comname, HOOK_STRING, HOOK_LEN))
2875 /* Look up cmd it hooks, and verify that we got an exact match. */
2876 tem = comname + HOOK_LEN;
2877 hookc = lookup_cmd (&tem, cmdlist, "", -1, 0);
2878 if (hookc && !STREQ (comname + HOOK_LEN, hookc->name))
2882 warning ("Your new `%s' command does not hook any existing command.",
2884 if (!query ("Proceed? "))
2885 error ("Not confirmed.");
2889 comname = savestring (comname, strlen (comname));
2891 /* If the rest of the commands will be case insensitive, this one
2892 should behave in the same manner. */
2893 for (tem = comname; *tem; tem++)
2895 *tem = tolower (*tem);
2897 sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname);
2898 cmds = read_command_lines (tmpbuf, from_tty);
2900 if (c && c->class == class_user)
2901 free_command_lines (&c->user_commands);
2903 newc = add_cmd (comname, class_user, user_defined_command,
2904 (c && c->class == class_user)
2905 ? c->doc : savestring ("User-defined.", 13), &cmdlist);
2906 newc->user_commands = cmds;
2908 /* If this new command is a hook, then mark both commands as being
2912 hookc->hook = newc; /* Target gets hooked. */
2913 newc->hookee = hookc; /* We are marked as hooking target cmd. */
2918 document_command (comname, from_tty)
2922 struct command_line *doclines;
2923 register struct cmd_list_element *c;
2924 char *tem = comname;
2927 validate_comname (comname);
2929 c = lookup_cmd (&tem, cmdlist, "", 0, 1);
2931 if (c->class != class_user)
2932 error ("Command \"%s\" is built-in.", comname);
2934 sprintf (tmpbuf, "Type documentation for \"%s\".", comname);
2935 doclines = read_command_lines (tmpbuf, from_tty);
2941 register struct command_line *cl1;
2942 register int len = 0;
2944 for (cl1 = doclines; cl1; cl1 = cl1->next)
2945 len += strlen (cl1->line) + 1;
2947 c->doc = (char *) xmalloc (len + 1);
2950 for (cl1 = doclines; cl1; cl1 = cl1->next)
2952 strcat (c->doc, cl1->line);
2954 strcat (c->doc, "\n");
2958 free_command_lines (&doclines);
2961 /* Print the GDB banner. */
2963 print_gdb_version (stream)
2966 /* From GNU coding standards, first line is meant to be easy for a
2967 program to parse, and is just canonical program name and version
2968 number, which starts after last space. */
2970 fprintf_filtered (stream, "GNU gdb %s\n", version);
2972 /* Second line is a copyright notice. */
2974 fprintf_filtered (stream, "Copyright 1998 Free Software Foundation, Inc.\n");
2976 /* Following the copyright is a brief statement that the program is
2977 free software, that users are free to copy and change it on
2978 certain conditions, that it is covered by the GNU GPL, and that
2979 there is no warranty. */
2981 fprintf_filtered (stream, "\
2982 GDB is free software, covered by the GNU General Public License, and you are\n\
2983 welcome to change it and/or distribute copies of it under certain conditions.\n\
2984 Type \"show copying\" to see the conditions.\n\
2985 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2987 /* After the required info we print the configuration information. */
2989 fprintf_filtered (stream, "This GDB was configured as \"");
2990 if (!STREQ (host_name, target_name))
2992 fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name);
2996 fprintf_filtered (stream, "%s", host_name);
2998 fprintf_filtered (stream, "\".");
3003 show_version (args, from_tty)
3008 print_gdb_version (gdb_stdout);
3009 printf_filtered ("\n");
3013 /* get_prompt: access method for the GDB prompt string. */
3015 #define MAX_PROMPT_SIZE 256
3018 * int get_prompt_1 (char * buf);
3020 * Work-horse for get_prompt (called via catch_errors).
3021 * Argument is buffer to hold the formatted prompt.
3023 * Returns: 1 for success (use formatted prompt)
3024 * 0 for failure (use gdb_prompt_string).
3027 static int gdb_prompt_escape;
3030 get_prompt_1 (formatted_prompt)
3031 char *formatted_prompt;
3036 local_prompt = PROMPT (0);
3038 local_prompt = gdb_prompt_string;
3041 if (gdb_prompt_escape == 0)
3043 return 0; /* do no formatting */
3046 /* formatted prompt */
3048 char fmt[40], *promptp, *outp, *tmp;
3055 struct type *arg_type, *elt_type;
3057 promptp = local_prompt;
3058 outp = formatted_prompt;
3060 while (*promptp != '\0')
3062 int available = MAX_PROMPT_SIZE - (outp - formatted_prompt) - 1;
3064 if (*promptp != gdb_prompt_escape)
3066 if (available >= 1) /* overflow protect */
3067 *outp++ = *promptp++;
3071 /* GDB prompt string contains escape char. Parse for arg.
3072 Two consecutive escape chars followed by arg followed by
3073 a comma means to insert the arg using a default format.
3074 Otherwise a printf format string may be included between
3075 the two escape chars. eg:
3076 %%foo, insert foo using default format
3077 %2.2f%foo, insert foo using "%2.2f" format
3078 A mismatch between the format string and the data type
3079 of "foo" is an error (which we don't know how to protect
3082 fmt[0] = '\0'; /* assume null format string */
3083 if (promptp[1] == gdb_prompt_escape) /* double esc char */
3085 promptp += 2; /* skip past two escape chars. */
3089 /* extract format string from between two esc chars */
3093 fmt[i++] = *promptp++; /* copy format string */
3095 while (i < sizeof (fmt) - 1 &&
3096 *promptp != gdb_prompt_escape &&
3099 if (*promptp != gdb_prompt_escape)
3100 error ("Syntax error at prompt position %d",
3101 promptp - local_prompt);
3104 promptp++; /* skip second escape char */
3105 fmt[i++] = '\0'; /* terminate the format string */
3109 arg_val = parse_to_comma_and_eval (&promptp);
3110 if (*promptp == ',')
3111 promptp++; /* skip past the comma */
3112 arg_type = check_typedef (VALUE_TYPE (arg_val));
3113 switch (TYPE_CODE (arg_type))
3115 case TYPE_CODE_ARRAY:
3116 elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type));
3117 if (TYPE_LENGTH (arg_type) > 0 &&
3118 TYPE_LENGTH (elt_type) == 1 &&
3119 TYPE_CODE (elt_type) == TYPE_CODE_INT)
3121 int len = TYPE_LENGTH (arg_type);
3123 if (VALUE_LAZY (arg_val))
3124 value_fetch_lazy (arg_val);
3125 tmp = VALUE_CONTENTS (arg_val);
3127 if (len > available)
3128 len = available; /* overflow protect */
3130 /* FIXME: how to protect GDB from crashing
3131 from bad user-supplied format string? */
3133 sprintf (outp, fmt, tmp);
3135 strncpy (outp, tmp, len);
3140 elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type));
3141 addrval = value_as_pointer (arg_val);
3143 if (TYPE_LENGTH (elt_type) == 1 &&
3144 TYPE_CODE (elt_type) == TYPE_CODE_INT &&
3147 /* display it as a string */
3148 char *default_fmt = "%s";
3152 /* Limiting the number of bytes that the following call
3153 will read protects us from sprintf overflow later. */
3154 i = target_read_string (addrval, /* src */
3156 available, /* len */
3158 if (err) /* read failed */
3159 error ("%s on target_read", safe_strerror (err));
3161 tmp[i] = '\0'; /* force-terminate string */
3162 /* FIXME: how to protect GDB from crashing
3163 from bad user-supplied format string? */
3164 sprintf (outp, fmt[0] == 0 ? default_fmt : fmt,
3170 /* display it as a pointer */
3171 char *default_fmt = "0x%x";
3173 /* FIXME: how to protect GDB from crashing
3174 from bad user-supplied format string? */
3175 if (available >= 16 /*? */ ) /* overflow protect */
3176 sprintf (outp, fmt[0] == 0 ? default_fmt : fmt,
3182 char *default_fmt = "%g";
3184 doubleval = value_as_double (arg_val);
3185 /* FIXME: how to protect GDB from crashing
3186 from bad user-supplied format string? */
3187 if (available >= 16 /*? */ ) /* overflow protect */
3188 sprintf (outp, fmt[0] == 0 ? default_fmt : fmt,
3189 (double) doubleval);
3194 char *default_fmt = "%d";
3196 longval = value_as_long (arg_val);
3197 /* FIXME: how to protect GDB from crashing
3198 from bad user-supplied format string? */
3199 if (available >= 16 /*? */ ) /* overflow protect */
3200 sprintf (outp, fmt[0] == 0 ? default_fmt : fmt,
3204 case TYPE_CODE_BOOL:
3206 /* no default format for bool */
3207 longval = value_as_long (arg_val);
3208 if (available >= 8 /*? */ ) /* overflow protect */
3211 strcpy (outp, "<true>");
3213 strcpy (outp, "<false>");
3217 case TYPE_CODE_ENUM:
3219 /* no default format for enum */
3220 longval = value_as_long (arg_val);
3221 len = TYPE_NFIELDS (arg_type);
3222 /* find enum name if possible */
3223 for (i = 0; i < len; i++)
3224 if (TYPE_FIELD_BITPOS (arg_type, i) == longval)
3225 break; /* match -- end loop */
3227 if (i < len) /* enum name found */
3229 char *name = TYPE_FIELD_NAME (arg_type, i);
3231 strncpy (outp, name, available);
3232 /* in casel available < strlen (name), */
3233 outp[available] = '\0';
3237 if (available >= 16 /*? */ ) /* overflow protect */
3238 sprintf (outp, "%ld", (long) longval);
3242 case TYPE_CODE_VOID:
3244 break; /* void type -- no output */
3246 error ("bad data type at prompt position %d",
3247 promptp - local_prompt);
3250 outp += strlen (outp);
3253 *outp++ = '\0'; /* terminate prompt string */
3261 static char buf[MAX_PROMPT_SIZE];
3263 if (catch_errors (get_prompt_1, buf, "bad formatted prompt: ",
3266 return &buf[0]; /* successful formatted prompt */
3270 /* Prompt could not be formatted. */
3274 return gdb_prompt_string;
3282 /* ??rehrauer: I don't know why this fails, since it looks as though
3283 assignments to prompt are wrapped in calls to savestring...
3288 PROMPT (0) = savestring (s, strlen (s));
3290 gdb_prompt_string = savestring (s, strlen (s));
3294 /* If necessary, make the user confirm that we should quit. Return
3295 non-zero if we should quit, zero if we shouldn't. */
3300 if (inferior_pid != 0 && target_has_execution)
3304 /* This is something of a hack. But there's no reliable way to
3305 see if a GUI is running. The `use_windows' variable doesn't
3308 s = "A debugging session is active.\nDo you still want to close the debugger?";
3309 else if (attach_flag)
3310 s = "The program is running. Quit anyway (and detach it)? ";
3312 s = "The program is running. Exit anyway? ";
3321 /* Quit without asking for confirmation. */
3324 quit_force (args, from_tty)
3330 /* An optional expression may be used to cause gdb to terminate with the
3331 value of that expression. */
3334 value_ptr val = parse_and_eval (args);
3336 exit_code = (int) value_as_long (val);
3339 if (inferior_pid != 0 && target_has_execution)
3342 target_detach (args, from_tty);
3347 /* UDI wants this, to kill the TIP. */
3350 /* Save the history information if it is appropriate to do so. */
3351 if (write_history_p && history_filename)
3352 write_history (history_filename);
3354 do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */
3357 /* tuiDo((TuiOpaqueFuncPtr)tuiCleanUp); */
3358 /* The above does not need to be inside a tuiDo(), since
3359 * it is not manipulating the curses screen, but rather,
3360 * it is tearing it down.
3369 /* Handle the quit command. */
3372 quit_command (args, from_tty)
3376 if (!quit_confirm ())
3377 error ("Not confirmed.");
3378 quit_force (args, from_tty);
3381 /* Returns whether GDB is running on a terminal and whether the user
3382 desires that questions be asked of them on that terminal. */
3385 input_from_terminal_p ()
3387 return gdb_has_a_terminal () && (instream == stdin) & caution;
3392 pwd_command (args, from_tty)
3397 error ("The \"pwd\" command does not take an argument: %s", args);
3398 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
3400 if (!STREQ (gdb_dirbuf, current_directory))
3401 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
3402 current_directory, gdb_dirbuf);
3404 printf_unfiltered ("Working directory %s.\n", current_directory);
3408 cd_command (dir, from_tty)
3413 /* Found something other than leading repetitions of "/..". */
3414 int found_real_path;
3417 /* If the new directory is absolute, repeat is a no-op; if relative,
3418 repeat might be useful but is more likely to be a mistake. */
3422 error_no_arg ("new working directory");
3424 dir = tilde_expand (dir);
3425 make_cleanup (free, dir);
3427 if (chdir (dir) < 0)
3428 perror_with_name (dir);
3430 #if defined(_WIN32) || defined(__MSDOS__)
3431 /* There's too much mess with DOSish names like "d:", "d:.",
3432 "d:./foo" etc. Instead of having lots of special #ifdef'ed code,
3433 simply get the canonicalized name of the current directory. */
3434 dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
3438 if (SLASH_P (dir[len-1]))
3440 /* Remove the trailing slash unless this is a root directory
3441 (including a drive letter on non-Unix systems). */
3442 if (!(len == 1) /* "/" */
3443 #if defined(_WIN32) || defined(__MSDOS__)
3444 && !(!SLASH_P (*dir) && ROOTED_P (dir) && len <= 3) /* "d:/" */
3450 dir = savestring (dir, len);
3452 current_directory = dir;
3455 if (SLASH_P (current_directory[strlen (current_directory) - 1]))
3456 current_directory = concat (current_directory, dir, NULL);
3458 current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
3462 /* Now simplify any occurrences of `.' and `..' in the pathname. */
3464 found_real_path = 0;
3465 for (p = current_directory; *p;)
3467 if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2])))
3469 else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.'
3470 && (p[3] == 0 || SLASH_P (p[3])))
3472 if (found_real_path)
3474 /* Search backwards for the directory just before the "/.."
3475 and obliterate it and the "/..". */
3477 while (q != current_directory && !SLASH_P (q[-1]))
3480 if (q == current_directory)
3481 /* current_directory is
3482 a relative pathname ("can't happen"--leave it alone). */
3486 strcpy (q - 1, p + 3);
3491 /* We are dealing with leading repetitions of "/..", for example
3492 "/../..", which is the Mach super-root. */
3497 found_real_path = 1;
3502 forget_cached_source_info ();
3505 pwd_command ((char *) 0, 1);
3508 struct source_cleanup_lines_args
3512 char *old_pre_error;
3513 char *old_error_pre_print;
3517 source_cleanup_lines (args)
3520 struct source_cleanup_lines_args *p =
3521 (struct source_cleanup_lines_args *) args;
3522 source_line_number = p->old_line;
3523 source_file_name = p->old_file;
3524 source_pre_error = p->old_pre_error;
3525 error_pre_print = p->old_error_pre_print;
3530 source_command (args, from_tty)
3535 struct cleanup *old_cleanups;
3537 struct source_cleanup_lines_args old_lines;
3542 error ("source command requires pathname of file to source.");
3545 file = tilde_expand (file);
3546 old_cleanups = make_cleanup (free, file);
3548 stream = fopen (file, FOPEN_RT);
3552 perror_with_name (file);
3557 make_cleanup ((make_cleanup_func) fclose, stream);
3559 old_lines.old_line = source_line_number;
3560 old_lines.old_file = source_file_name;
3561 old_lines.old_pre_error = source_pre_error;
3562 old_lines.old_error_pre_print = error_pre_print;
3563 make_cleanup (source_cleanup_lines, &old_lines);
3564 source_line_number = 0;
3565 source_file_name = file;
3566 source_pre_error = error_pre_print == NULL ? "" : error_pre_print;
3567 source_pre_error = savestring (source_pre_error, strlen (source_pre_error));
3568 make_cleanup (free, source_pre_error);
3569 /* This will get set every time we read a line. So it won't stay "" for
3571 error_pre_print = "";
3573 needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80;
3574 if (source_error_allocated < needed_length)
3576 source_error_allocated *= 2;
3577 if (source_error_allocated < needed_length)
3578 source_error_allocated = needed_length;
3579 if (source_error == NULL)
3580 source_error = xmalloc (source_error_allocated);
3582 source_error = xrealloc (source_error, source_error_allocated);
3585 read_command_file (stream);
3587 do_cleanups (old_cleanups);
3592 echo_command (text, from_tty)
3600 while ((c = *p++) != '\0')
3604 /* \ at end of argument is used after spaces
3605 so they won't be lost. */
3609 c = parse_escape (&p);
3611 printf_filtered ("%c", c);
3614 printf_filtered ("%c", c);
3617 /* Force this output to appear now. */
3619 gdb_flush (gdb_stdout);
3624 dont_repeat_command (ignored, from_tty)
3628 *line = 0; /* Can't call dont_repeat here because we're not
3629 necessarily reading from stdin. */
3632 /* Functions to manipulate command line editing control variables. */
3634 /* Number of commands to print in each call to show_commands. */
3635 #define Hist_print 10
3637 show_commands (args, from_tty)
3641 /* Index for history commands. Relative to history_base. */
3644 /* Number of the history entry which we are planning to display next.
3645 Relative to history_base. */
3648 /* The first command in the history which doesn't exist (i.e. one more
3649 than the number of the last command). Relative to history_base. */
3652 extern HIST_ENTRY *history_get PARAMS ((int));
3654 /* Print out some of the commands from the command history. */
3655 /* First determine the length of the history list. */
3656 hist_len = history_size;
3657 for (offset = 0; offset < history_size; offset++)
3659 if (!history_get (history_base + offset))
3668 if (args[0] == '+' && args[1] == '\0')
3669 /* "info editing +" should print from the stored position. */
3672 /* "info editing <exp>" should print around command number <exp>. */
3673 num = (parse_and_eval_address (args) - history_base) - Hist_print / 2;
3675 /* "show commands" means print the last Hist_print commands. */
3678 num = hist_len - Hist_print;
3684 /* If there are at least Hist_print commands, we want to display the last
3685 Hist_print rather than, say, the last 6. */
3686 if (hist_len - num < Hist_print)
3688 num = hist_len - Hist_print;
3693 for (offset = num; offset < num + Hist_print && offset < hist_len; offset++)
3695 printf_filtered ("%5d %s\n", history_base + offset,
3696 (history_get (history_base + offset))->line);
3699 /* The next command we want to display is the next one that we haven't
3703 /* If the user repeats this command with return, it should do what
3704 "show commands +" does. This is unnecessary if arg is null,
3705 because "show commands +" is not useful after "show commands". */
3706 if (from_tty && args)
3713 /* Called by do_setshow_command. */
3716 set_history_size_command (args, from_tty, c)
3719 struct cmd_list_element *c;
3721 if (history_size == INT_MAX)
3722 unstifle_history ();
3723 else if (history_size >= 0)
3724 stifle_history (history_size);
3727 history_size = INT_MAX;
3728 error ("History size must be non-negative");
3734 set_history (args, from_tty)
3738 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3739 help_list (sethistlist, "set history ", -1, gdb_stdout);
3744 show_history (args, from_tty)
3748 cmd_show_list (showhistlist, from_tty, "");
3751 int info_verbose = 0; /* Default verbose msgs off */
3753 /* Called by do_setshow_command. An elaborate joke. */
3756 set_verbose (args, from_tty, c)
3759 struct cmd_list_element *c;
3761 char *cmdname = "verbose";
3762 struct cmd_list_element *showcmd;
3764 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
3768 c->doc = "Set verbose printing of informational messages.";
3769 showcmd->doc = "Show verbose printing of informational messages.";
3773 c->doc = "Set verbosity.";
3774 showcmd->doc = "Show verbosity.";
3779 float_handler (signo)
3782 /* This message is based on ANSI C, section 4.7. Note that integer
3783 divide by zero causes this, so "float" is a misnomer. */
3784 signal (SIGFPE, float_handler);
3785 error ("Erroneous arithmetic operation.");
3799 enablebreaklist = NULL;
3804 showhistlist = NULL;
3805 unsethistlist = NULL;
3806 maintenancelist = NULL;
3807 maintenanceinfolist = NULL;
3808 maintenanceprintlist = NULL;
3809 setprintlist = NULL;
3810 showprintlist = NULL;
3811 setchecklist = NULL;
3812 showchecklist = NULL;
3815 /* Init the history buffer. Note that we are called after the init file(s)
3816 * have been read so that the user can change the history file via his
3817 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3818 * overrides all of this.
3826 tmpenv = getenv ("HISTSIZE");
3828 history_size = atoi (tmpenv);
3829 else if (!history_size)
3832 stifle_history (history_size);
3834 tmpenv = getenv ("GDBHISTFILE");
3836 history_filename = savestring (tmpenv, strlen (tmpenv));
3837 else if (!history_filename)
3839 /* We include the current directory so that if the user changes
3840 directories the file written will be the same as the one
3843 /* No leading dots in file names are allowed on MSDOS. */
3844 history_filename = concat (current_directory, "/_gdb_history", NULL);
3846 history_filename = concat (current_directory, "/.gdb_history", NULL);
3849 read_history (history_filename);
3855 struct cmd_list_element *c;
3857 /* If we are running the asynchronous version,
3858 we initialize the prompts differently. */
3861 gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT));
3865 /* initialize the prompt stack to a simple "(gdb) " prompt or to
3866 whatever the DEFAULT_PROMPT is. */
3867 the_prompts.top = 0;
3869 PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT));
3871 /* Set things up for annotation_level > 1, if the user ever decides
3873 async_annotation_suffix = "prompt";
3874 /* Set the variable associated with the setshow prompt command. */
3875 new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0)));
3877 gdb_prompt_escape = 0; /* default to none. */
3879 /* Set the important stuff up for command editing. */
3880 command_editing_p = 1;
3881 history_expansion_p = 0;
3882 write_history_p = 0;
3884 /* Setup important stuff for command line editing. */
3885 rl_completion_entry_function = (int (*)()) readline_line_completion_function;
3886 rl_completer_word_break_characters = gdb_completer_word_break_characters;
3887 rl_completer_quote_characters = gdb_completer_quote_characters;
3888 rl_readline_name = "gdb";
3890 /* Define the classes of commands.
3891 They will appear in the help list in the reverse of this order. */
3893 add_cmd ("internals", class_maintenance, NO_FUNCTION,
3894 "Maintenance commands.\n\
3895 Some gdb commands are provided just for use by gdb maintainers.\n\
3896 These commands are subject to frequent change, and may not be as\n\
3897 well documented as user commands.",
3899 add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
3900 add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
3901 add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\
3902 The commands in this class are those defined by the user.\n\
3903 Use the \"define\" command to define a command.", &cmdlist);
3904 add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist);
3906 add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
3907 add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
3908 add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
3909 add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
3910 add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\
3911 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3912 counting from zero for the innermost (currently executing) frame.\n\n\
3913 At any time gdb identifies one frame as the \"selected\" frame.\n\
3914 Variable lookups are done with respect to the selected frame.\n\
3915 When the program being debugged stops, gdb selects the innermost frame.\n\
3916 The commands below can be used to select other frames by number or address.",
3918 add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
3920 add_com ("pwd", class_files, pwd_command,
3921 "Print working directory. This is used for your program as well.");
3922 c = add_cmd ("cd", class_files, cd_command,
3923 "Set working directory to DIR for debugger and program being debugged.\n\
3924 The change does not take effect for the program being debugged\n\
3925 until the next time it is started.", &cmdlist);
3926 c->completer = filename_completer;
3928 /* The set prompt command is different depending whether or not the
3929 async version is run. NOTE: this difference is going to
3930 disappear as we make the event loop be the default engine of
3935 (add_set_cmd ("prompt", class_support, var_string,
3936 (char *) &gdb_prompt_string, "Set gdb's prompt",
3942 c = add_set_cmd ("prompt", class_support, var_string,
3943 (char *) &new_async_prompt, "Set gdb's prompt",
3945 add_show_from_set (c, &showlist);
3946 c->function.sfunc = set_async_prompt;
3950 (add_set_cmd ("prompt-escape-char", class_support, var_zinteger,
3951 (char *) &gdb_prompt_escape,
3952 "Set escape character for formatting of gdb's prompt",
3956 add_com ("echo", class_support, echo_command,
3957 "Print a constant string. Give string as argument.\n\
3958 C escape sequences may be used in the argument.\n\
3959 No newline is added at the end of the argument;\n\
3960 use \"\\n\" if you want a newline to be printed.\n\
3961 Since leading and trailing whitespace are ignored in command arguments,\n\
3962 if you want to print some you must use \"\\\" before leading whitespace\n\
3963 to be printed or after trailing whitespace.");
3964 add_com ("document", class_support, document_command,
3965 "Document a user-defined command.\n\
3966 Give command name as argument. Give documentation on following lines.\n\
3967 End with a line of just \"end\".");
3968 add_com ("define", class_support, define_command,
3969 "Define a new command name. Command name is argument.\n\
3970 Definition appears on following lines, one command per line.\n\
3971 End with a line of just \"end\".\n\
3972 Use the \"document\" command to give documentation for the new command.\n\
3973 Commands defined in this way may have up to ten arguments.");
3976 c = add_cmd ("source", class_support, source_command,
3977 "Read commands from a file named FILE.\n\
3978 Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
3979 when gdb is started.", &cmdlist);
3981 /* Punt file name, we can't help it easily. */
3982 c = add_cmd ("source", class_support, source_command,
3983 "Read commands from a file named FILE.\n\
3984 Note that the file \".gdbinit\" is read automatically in this way\n\
3985 when gdb is started.", &cmdlist);
3987 c->completer = filename_completer;
3989 add_com ("quit", class_support, quit_command, "Exit gdb.");
3990 add_com ("help", class_support, help_command, "Print list of commands.");
3991 add_com_alias ("q", "quit", class_support, 1);
3992 add_com_alias ("h", "help", class_support, 1);
3994 add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\
3995 Primarily used inside of user-defined commands that should not be repeated when\n\
3998 c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose,
4001 add_show_from_set (c, &showlist);
4002 c->function.sfunc = set_verbose;
4003 set_verbose (NULL, 0, c);
4005 /* The set editing command is different depending whether or not the
4006 async version is run. NOTE: this difference is going to disappear
4007 as we make the event loop be the default engine of gdb. */
4011 (add_set_cmd ("editing", class_support, var_boolean, (char *) &command_editing_p,
4012 "Set editing of command lines as they are typed.\n\
4013 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
4014 Without an argument, command line editing is enabled. To edit, use\n\
4015 EMACS-like or VI-like commands like control-P or ESC.", &setlist),
4020 c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p,
4021 "Set editing of command lines as they are typed.\n\
4022 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
4023 Without an argument, command line editing is enabled. To edit, use\n\
4024 EMACS-like or VI-like commands like control-P or ESC.", &setlist);
4026 add_show_from_set (c, &showlist);
4027 c->function.sfunc = set_async_editing_command;
4030 add_prefix_cmd ("history", class_support, set_history,
4031 "Generic command for setting command history parameters.",
4032 &sethistlist, "set history ", 0, &setlist);
4033 add_prefix_cmd ("history", class_support, show_history,
4034 "Generic command for showing command history parameters.",
4035 &showhistlist, "show history ", 0, &showlist);
4038 (add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p,
4039 "Set history expansion on command input.\n\
4040 Without an argument, history expansion is enabled.", &sethistlist),
4044 (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p,
4045 "Set saving of the history record on exit.\n\
4046 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
4047 Without an argument, saving is enabled.", &sethistlist),
4050 c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size,
4051 "Set the size of the command history, \n\
4052 ie. the number of previous commands to keep a record of.", &sethistlist);
4053 add_show_from_set (c, &showhistlist);
4054 c->function.sfunc = set_history_size_command;
4057 (add_set_cmd ("filename", no_class, var_filename, (char *) &history_filename,
4058 "Set the filename in which to record the command history\n\
4059 (the list of previous commands of which a record is kept).", &sethistlist),
4063 (add_set_cmd ("confirm", class_support, var_boolean,
4065 "Set whether to confirm potentially dangerous operations.",
4069 add_prefix_cmd ("info", class_info, info_command,
4070 "Generic command for showing things about the program being debugged.",
4071 &infolist, "info ", 0, &cmdlist);
4072 add_com_alias ("i", "info", class_info, 1);
4074 add_com ("complete", class_obscure, complete_command,
4075 "List the completions for the rest of the line as a command.");
4077 add_prefix_cmd ("show", class_info, show_command,
4078 "Generic command for showing things about the debugger.",
4079 &showlist, "show ", 0, &cmdlist);
4080 /* Another way to get at the same thing. */
4081 add_info ("set", show_command, "Show all GDB settings.");
4083 add_cmd ("commands", no_class, show_commands,
4084 "Show the history of commands you typed.\n\
4085 You can supply a command number to start with, or a `+' to start after\n\
4086 the previous command number shown.",
4089 add_cmd ("version", no_class, show_version,
4090 "Show what version of GDB this is.", &showlist);
4092 add_com ("while", class_support, while_command,
4093 "Execute nested commands WHILE the conditional expression is non zero.\n\
4094 The conditional expression must follow the word `while' and must in turn be\n\
4095 followed by a new line. The nested commands must be entered one per line,\n\
4096 and should be terminated by the word `end'.");
4098 add_com ("if", class_support, if_command,
4099 "Execute nested commands once IF the conditional expression is non zero.\n\
4100 The conditional expression must follow the word `if' and must in turn be\n\
4101 followed by a new line. The nested commands must be entered one per line,\n\
4102 and should be terminated by the word 'else' or `end'. If an else clause\n\
4103 is used, the same rules apply to its nested commands as to the first ones.");
4105 /* If target is open when baud changes, it doesn't take effect until the
4106 next open (I think, not sure). */
4107 add_show_from_set (add_set_cmd ("remotebaud", no_class,
4108 var_zinteger, (char *) &baud_rate,
4109 "Set baud rate for remote serial I/O.\n\
4110 This value is used to set the speed of the serial port when debugging\n\
4111 using remote targets.", &setlist),
4115 add_set_cmd ("remotedebug", no_class, var_zinteger, (char *) &remote_debug,
4116 "Set debugging of remote protocol.\n\
4117 When enabled, each packet sent or received with the remote target\n\
4118 is displayed.", &setlist),
4122 add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout,
4123 "Set timeout limit to wait for target to respond.\n\
4124 This value is used to set the time limit for gdb to wait for a response\n\
4125 from the target.", &setlist),
4128 /* The set annotate command is different depending whether or not
4129 the async version is run. NOTE: this difference is going to
4130 disappear as we make the event loop be the default engine of
4134 c = add_set_cmd ("annotate", class_obscure, var_zinteger,
4135 (char *) &annotation_level, "Set annotation_level.\n\
4136 0 == normal; 1 == fullname (for use when running under emacs)\n\
4137 2 == output annotated suitably for use by programs that control GDB.",
4139 c = add_show_from_set (c, &showlist);
4143 c = add_set_cmd ("annotate", class_obscure, var_zinteger,
4144 (char *) &annotation_level, "Set annotation_level.\n\
4145 0 == normal; 1 == fullname (for use when running under emacs)\n\
4146 2 == output annotated suitably for use by programs that control GDB.",
4148 add_show_from_set (c, &showlist);
4149 c->function.sfunc = set_async_annotation_level;
4154 (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p,
4155 "Set notification of completion for asynchronous execution commands.\n\
4156 Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist),