1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "call-cmds.h"
28 #include "breakpoint.h"
30 #include "expression.h"
32 #include "terminal.h" /* For job_control. */
37 /* readline include files */
41 /* readline defines this. */
44 #include <sys/types.h>
46 /* What is this for? X_OK? */
54 #include <sys/param.h>
58 /* Prototypes for local functions */
61 symbol_completion_function
PARAMS ((char *, int));
64 command_loop_marker
PARAMS ((int));
67 init_main
PARAMS ((void));
70 init_cmd_lists
PARAMS ((void));
73 float_handler
PARAMS ((int));
76 init_signals
PARAMS ((void));
79 set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
82 show_history
PARAMS ((char *, int));
85 set_history
PARAMS ((char *, int));
88 set_history_size_command
PARAMS ((char *, int, struct cmd_list_element
*));
91 show_commands
PARAMS ((char *, int));
94 echo_command
PARAMS ((char *, int));
97 pwd_command
PARAMS ((char *, int));
100 show_version
PARAMS ((char *, int));
103 document_command
PARAMS ((char *, int));
106 define_command
PARAMS ((char *, int));
109 validate_comname
PARAMS ((char *));
112 help_command
PARAMS ((char *, int));
115 show_command
PARAMS ((char *, int));
118 info_command
PARAMS ((char *, int));
121 complete_command
PARAMS ((char *, int));
124 do_nothing
PARAMS ((int));
127 quit_cover
PARAMS ((char *));
130 disconnect
PARAMS ((int));
133 source_cleanup
PARAMS ((FILE *));
135 /* If this definition isn't overridden by the header files, assume
136 that isatty and fileno exist on this system. */
138 #define ISATTY(FP) (isatty (fileno (FP)))
141 /* Initialization file name for gdb. This is overridden in some configs. */
143 #ifndef GDBINIT_FILENAME
144 #define GDBINIT_FILENAME ".gdbinit"
146 char gdbinit
[] = GDBINIT_FILENAME
;
147 int inhibit_gdbinit
= 0;
149 /* Disable windows if non-zero */
153 /* Version number of GDB, as a string. */
155 extern char *version
;
157 /* Canonical host name as a string. */
159 extern char *host_name
;
161 /* Canonical target name as a string. */
163 extern char *target_name
;
165 extern char lang_frame_mismatch_warn
[]; /* language.c */
167 /* Flag for whether we want all the "from_tty" gubbish printed. */
169 int caution
= 1; /* Default is yes, sigh. */
172 * Define all cmd_list_element's
175 /* Chain containing all defined commands. */
177 struct cmd_list_element
*cmdlist
;
179 /* Chain containing all defined info subcommands. */
181 struct cmd_list_element
*infolist
;
183 /* Chain containing all defined enable subcommands. */
185 struct cmd_list_element
*enablelist
;
187 /* Chain containing all defined disable subcommands. */
189 struct cmd_list_element
*disablelist
;
191 /* Chain containing all defined delete subcommands. */
193 struct cmd_list_element
*deletelist
;
195 /* Chain containing all defined "enable breakpoint" subcommands. */
197 struct cmd_list_element
*enablebreaklist
;
199 /* Chain containing all defined set subcommands */
201 struct cmd_list_element
*setlist
;
203 /* Chain containing all defined unset subcommands */
205 struct cmd_list_element
*unsetlist
;
207 /* Chain containing all defined show subcommands. */
209 struct cmd_list_element
*showlist
;
211 /* Chain containing all defined \"set history\". */
213 struct cmd_list_element
*sethistlist
;
215 /* Chain containing all defined \"show history\". */
217 struct cmd_list_element
*showhistlist
;
219 /* Chain containing all defined \"unset history\". */
221 struct cmd_list_element
*unsethistlist
;
223 /* Chain containing all defined maintenance subcommands. */
226 struct cmd_list_element
*maintenancelist
;
229 /* Chain containing all defined "maintenance info" subcommands. */
232 struct cmd_list_element
*maintenanceinfolist
;
235 /* Chain containing all defined "maintenance print" subcommands. */
238 struct cmd_list_element
*maintenanceprintlist
;
241 struct cmd_list_element
*setprintlist
;
243 struct cmd_list_element
*showprintlist
;
245 struct cmd_list_element
*setchecklist
;
247 struct cmd_list_element
*showchecklist
;
249 /* stdio stream that command input is being read from. Set to stdin normally.
250 Set by source_command to the file we are sourcing. Set to NULL if we are
251 executing a user-defined command. */
255 /* Current working directory. */
257 char *current_directory
;
259 /* The directory name is actually stored here (usually). */
260 char gdb_dirbuf
[1024];
262 /* Function to call before reading a command, if nonzero.
263 The function receives two args: an input stream,
264 and a prompt string. */
266 void (*window_hook
) PARAMS ((FILE *, char *));
271 /* gdb prints this when reading a command interactively */
274 /* Buffer used for reading command lines, and the size
275 allocated for it so far. */
280 /* Nonzero if the current command is modified by "server ". This
281 affects things like recording into the command history, comamnds
282 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
283 whatever) can issue its own commands and also send along commands
284 from the user, and have the user not notice that the user interface
285 is issuing commands too. */
288 /* Baud rate specified for talking to serial target systems. Default
289 is left as -1, so targets can choose their own defaults. */
290 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
291 or (unsigned int)-1. This is a Bad User Interface. */
295 /* Non-zero tells remote* modules to output debugging info. */
297 int remote_debug
= 0;
299 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
303 #define STOP_SIGNAL SIGTSTP
304 static void stop_sig
PARAMS ((int));
308 /* Some System V have job control but not sigsetmask(). */
309 #if !defined (HAVE_SIGSETMASK)
311 #define HAVE_SIGSETMASK 1
313 #define HAVE_SIGSETMASK 0
317 #if 0 == (HAVE_SIGSETMASK)
318 #define sigsetmask(n)
321 /* Hooks for alternate command interfaces. */
323 /* Called after most modules have been initialized, but before taking users
326 void (*init_ui_hook
) PARAMS ((void));
328 /* Called instead of command_loop at top level. Can be invoked via
329 return_to_top_level. */
331 void (*command_loop_hook
) PARAMS ((void));
333 /* Called instead of fputs for all output. */
335 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
));
337 /* Called from print_frame_info to list the line we stopped in. */
339 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
340 int stopline
, int noerror
));
341 /* Replaces most of query. */
343 int (*query_hook
) PARAMS (());
345 /* Called from gdb_flush to flush output. */
347 void (*flush_hook
) PARAMS ((FILE *stream
));
349 /* Called as appropriate to notify the interface of the specified breakpoint
352 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*b
));
353 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
354 void (*enable_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
355 void (*disable_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
357 /* Where to go for return_to_top_level (RETURN_ERROR). */
358 jmp_buf error_return
;
359 /* Where to go for return_to_top_level (RETURN_QUIT). */
362 /* Return for reason REASON. This generally gets back to the command
363 loop, but can be caught via catch_errors. */
366 return_to_top_level (reason
)
367 enum return_reason reason
;
372 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
373 I can think of a reason why that is vital, though). */
374 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
376 disable_current_display ();
377 do_cleanups (ALL_CLEANUPS
);
379 if (annotation_level
> 1)
390 (NORETURN
void) longjmp
391 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
394 /* Call FUNC with arg ARGS, catching any errors. If there is no
395 error, return the value returned by FUNC. If there is an error,
396 print ERRSTRING, print the specific error message, then return
399 Must not be called with immediate_quit in effect (bad things might
400 happen, say we got a signal in the middle of a memcpy to quit_return).
401 This is an OK restriction; with very few exceptions immediate_quit can
402 be replaced by judicious use of QUIT.
404 MASK specifies what to catch; it is normally set to
405 RETURN_MASK_ALL, if for no other reason than that the code which
406 calls catch_errors might not be set up to deal with a quit which
407 isn't caught. But if the code can deal with it, it generally
408 should be RETURN_MASK_ERROR, unless for some reason it is more
409 useful to abort only the portion of the operation inside the
410 catch_errors. Note that quit should return to the command line
411 fairly quickly, even if some further processing is being done. */
414 catch_errors (func
, args
, errstring
, mask
)
415 int (*func
) PARAMS ((char *));
424 struct cleanup
*saved_cleanup_chain
;
425 char *saved_error_pre_print
;
427 saved_cleanup_chain
= save_cleanups ();
428 saved_error_pre_print
= error_pre_print
;
430 if (mask
& RETURN_MASK_ERROR
)
431 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
432 if (mask
& RETURN_MASK_QUIT
)
433 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
434 error_pre_print
= errstring
;
436 if (setjmp (tmp_jmp
) == 0)
438 if (mask
& RETURN_MASK_ERROR
)
439 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
440 if (mask
& RETURN_MASK_QUIT
)
441 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
442 val
= (*func
) (args
);
447 restore_cleanups (saved_cleanup_chain
);
449 error_pre_print
= saved_error_pre_print
;
450 if (mask
& RETURN_MASK_ERROR
)
451 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
452 if (mask
& RETURN_MASK_QUIT
)
453 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
457 /* Handler for SIGHUP. */
463 catch_errors (quit_cover
, NULL
,
464 "Could not kill the program being debugged", RETURN_MASK_ALL
);
465 signal (SIGHUP
, SIG_DFL
);
466 kill (getpid (), SIGHUP
);
469 /* Just a little helper function for disconnect(). */
475 caution
= 0; /* Throw caution to the wind -- we're exiting.
476 This prevents asking the user dumb questions. */
477 quit_command((char *)0, 0);
481 /* Line number we are currently in in a file which is being sourced. */
482 static int source_line_number
;
484 /* Name of the file we are sourcing. */
485 static char *source_file_name
;
487 /* Buffer containing the error_pre_print used by the source stuff.
489 static char *source_error
;
490 static int source_error_allocated
;
492 /* Something to glom on to the start of error_pre_print if source_file_name
494 static char *source_pre_error
;
496 /* Clean up on error during a "source" command (or execution of a
497 user-defined command). */
500 source_cleanup (stream
)
503 /* Restore the previous input stream. */
507 /* Read commands from STREAM. */
509 read_command_file (stream
)
512 struct cleanup
*cleanups
;
514 cleanups
= make_cleanup (source_cleanup
, instream
);
517 do_cleanups (cleanups
);
520 extern void init_proc ();
525 /* Run the init function of each source file */
527 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
528 current_directory
= gdb_dirbuf
;
530 init_cmd_lists (); /* This needs to be done first */
531 initialize_targets (); /* Setup target_terminal macros for utils.c */
532 initialize_utils (); /* Make errors and warnings possible */
533 initialize_all_files ();
534 init_main (); /* But that omits this file! Do it now */
539 /* We need a default language for parsing expressions, so simple things like
540 "set width 0" won't fail if no language is explicitly set in a config file
541 or implicitly set by reading an executable during startup. */
542 set_language (language_c
);
543 expected_language
= current_language
; /* don't warn about the change. */
550 execute_user_command (c
, args
)
551 struct cmd_list_element
*c
;
554 register struct command_line
*cmdlines
;
555 struct cleanup
*old_chain
;
558 error ("User-defined commands cannot take arguments.");
560 cmdlines
= c
->user_commands
;
565 /* Set the instream to 0, indicating execution of a
566 user-defined function. */
567 old_chain
= make_cleanup (source_cleanup
, instream
);
568 instream
= (FILE *) 0;
571 execute_command (cmdlines
->line
, 0);
572 cmdlines
= cmdlines
->next
;
574 do_cleanups (old_chain
);
577 /* Execute the line P as a command.
578 Pass FROM_TTY as second argument to the defining function. */
581 execute_command (p
, from_tty
)
585 register struct cmd_list_element
*c
;
586 register enum language flang
;
587 static int warned
= 0;
591 /* This can happen when command_line_input hits end of file. */
595 while (*p
== ' ' || *p
== '\t') p
++;
600 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
601 /* Pass null arg rather than an empty one. */
604 /* If this command has been hooked, run the hook first. */
606 execute_user_command (c
->hook
, (char *)0);
608 if (c
->class == class_user
)
609 execute_user_command (c
, arg
);
610 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
611 do_setshow_command (arg
, from_tty
& caution
, c
);
612 else if (c
->function
.cfunc
== NO_FUNCTION
)
613 error ("That is not a command, just a help topic.");
615 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
618 /* Tell the user if the language has changed (except first time). */
619 if (current_language
!= expected_language
)
621 if (language_mode
== language_mode_auto
) {
622 language_info (1); /* Print what changed. */
627 /* Warn the user if the working language does not match the
628 language of the current frame. Only warn the user if we are
629 actually running the program, i.e. there is a stack. */
630 /* FIXME: This should be cacheing the frame and only running when
631 the frame changes. */
632 if (target_has_stack
)
634 flang
= get_frame_language ();
636 && flang
!= language_unknown
637 && flang
!= current_language
->la_language
)
639 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
647 command_loop_marker (foo
)
652 /* Read commands from `instream' and execute them
653 until end of file or error reading instream. */
657 struct cleanup
*old_chain
;
659 int stdin_is_tty
= ISATTY (stdin
);
661 while (!feof (instream
))
663 if (window_hook
&& instream
== stdin
)
664 (*window_hook
) (instream
, prompt
);
667 if (instream
== stdin
&& stdin_is_tty
)
668 reinitialize_more_filter ();
669 old_chain
= make_cleanup (command_loop_marker
, 0);
670 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
671 instream
== stdin
, "prompt");
674 execute_command (command
, instream
== stdin
);
675 /* Do any commands attached to breakpoint we stopped at. */
676 bpstat_do_actions (&stop_bpstat
);
677 do_cleanups (old_chain
);
681 /* Commands call this if they do not want to be repeated by null lines. */
689 /* If we aren't reading from standard input, we are saving the last
690 thing read from stdin in line and don't want to delete it. Null lines
691 won't repeat here in any case. */
692 if (instream
== stdin
)
696 /* Read a line from the stream "instream" without command line editing.
698 It prints PRROMPT once at the start.
699 Action is compatible with "readline", e.g. space for the result is
700 malloc'd and should be freed by the caller.
702 A NULL return means end of file. */
704 gdb_readline (prrompt
)
710 int result_size
= 80;
714 /* Don't use a _filtered function here. It causes the assumed
715 character position to be off, since the newline we read from
716 the user is not accounted for. */
717 fputs_unfiltered (prrompt
, gdb_stdout
);
718 /* start-sanitize-mpw */
720 /* Move to a new line so the entered line doesn't have a prompt
721 on the front of it. */
722 fputs_unfiltered ("\n", gdb_stdout
);
724 /* end-sanitize-mpw */
725 gdb_flush (gdb_stdout
);
728 result
= (char *) xmalloc (result_size
);
732 /* Read from stdin if we are executing a user defined command.
733 This is the right thing for prompt_for_continue, at least. */
734 c
= fgetc (instream
? instream
: stdin
);
739 /* The last line does not end with a newline. Return it, and
740 if we are called again fgetc will still return EOF and
741 we'll return NULL then. */
750 result
[input_index
++] = c
;
751 while (input_index
>= result_size
)
754 result
= (char *) xrealloc (result
, result_size
);
758 result
[input_index
++] = '\0';
762 /* Variables which control command line editing and history
763 substitution. These variables are given default values at the end
765 static int command_editing_p
;
766 static int history_expansion_p
;
767 static int write_history_p
;
768 static int history_size
;
769 static char *history_filename
;
771 /* readline uses the word breaks for two things:
772 (1) In figuring out where to point the TEXT parameter to the
773 rl_completion_entry_function. Since we don't use TEXT for much,
774 it doesn't matter a lot what the word breaks are for this purpose, but
775 it does affect how much stuff M-? lists.
776 (2) If one of the matches contains a word break character, readline
777 will quote it. That's why we switch between
778 gdb_completer_word_break_characters and
779 gdb_completer_command_word_break_characters. I'm not sure when
780 we need this behavior (perhaps for funky characters in C++ symbols?). */
782 /* Variables which are necessary for fancy command line editing. */
783 char *gdb_completer_word_break_characters
=
784 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
786 /* When completing on command names, we remove '-' from the list of
787 word break characters, since we use it in command names. If the
788 readline library sees one in any of the current completion strings,
789 it thinks that the string needs to be quoted and automatically supplies
791 char *gdb_completer_command_word_break_characters
=
792 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
794 /* Characters that can be used to quote completion strings. Note that we
795 can't include '"' because the gdb C parser treats such quoted sequences
797 char *gdb_completer_quote_characters
=
800 /* Functions that are used as part of the fancy command line editing. */
802 /* This can be used for functions which don't want to complete on symbols
803 but don't want to complete on anything else either. */
806 noop_completer (text
, prefix
)
813 /* Complete on filenames. */
815 filename_completer (text
, word
)
820 extern char *filename_completion_function ();
824 int return_val_alloced
;
827 /* Small for testing. */
828 return_val_alloced
= 1;
829 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
835 p
= filename_completion_function (text
, subsequent_name
);
836 if (return_val_used
>= return_val_alloced
)
838 return_val_alloced
*= 2;
840 (char **) xrealloc (return_val
,
841 return_val_alloced
* sizeof (char *));
845 return_val
[return_val_used
++] = p
;
848 /* Like emacs, don't complete on old versions. Especially useful
849 in the "source" command. */
850 if (p
[strlen (p
) - 1] == '~')
856 /* Return exactly p. */
857 return_val
[return_val_used
++] = p
;
858 else if (word
> text
)
860 /* Return some portion of p. */
861 q
= xmalloc (strlen (p
) + 5);
862 strcpy (q
, p
+ (word
- text
));
863 return_val
[return_val_used
++] = q
;
868 /* Return some of TEXT plus p. */
869 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
870 strncpy (q
, word
, text
- word
);
871 q
[text
- word
] = '\0';
873 return_val
[return_val_used
++] = q
;
880 /* There is no way to do this just long enough to affect quote inserting
881 without also affecting the next completion. This should be fixed in
883 /* Insure that readline does the right thing
884 with respect to inserting quotes. */
885 rl_completer_word_break_characters
= "";
890 /* Here are some useful test cases for completion. FIXME: These should
891 be put in the test suite. They should be tested with both M-? and TAB.
893 "show output-" "radix"
894 "show output" "-radix"
895 "p" ambiguous (commands starting with p--path, print, printf, etc.)
896 "p " ambiguous (all symbols)
897 "info t foo" no completions
898 "info t " no completions
899 "info t" ambiguous ("info target", "info terminal", etc.)
900 "info ajksdlfk" no completions
901 "info ajksdlfk " no completions
903 "info " ambiguous (all info commands)
904 "p \"a" no completions (string constant)
905 "p 'a" ambiguous (all symbols starting with a)
906 "p b-a" ambiguous (all symbols starting with a)
907 "p b-" ambiguous (all symbols)
908 "file Make" "file" (word break hard to screw up here)
909 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
912 /* Generate completions one by one for the completer. Each time we are
913 called return another potential completion to the caller. The function
914 is misnamed; it just completes on commands or passes the buck to the
915 command's completer function; the stuff specific to symbol completion
916 is in make_symbol_completion_list.
918 TEXT is readline's idea of the "word" we are looking at; we don't really
919 like readline's ideas about word breaking so we ignore it.
921 MATCHES is the number of matches that have currently been collected from
922 calling this completion function. When zero, then we need to initialize,
923 otherwise the initialization has already taken place and we can just
924 return the next potential completion string.
926 Returns NULL if there are no more completions, else a pointer to a string
927 which is a possible completion.
929 RL_LINE_BUFFER is available to be looked at; it contains the entire text
930 of the line. RL_POINT is the offset in that line of the cursor. You
931 should pretend that the line ends at RL_POINT. */
934 symbol_completion_function (text
, matches
)
938 static char **list
= (char **)NULL
; /* Cache of completions */
939 static int index
; /* Next cached completion */
941 char *tmp_command
, *p
;
942 /* Pointer within tmp_command which corresponds to text. */
944 struct cmd_list_element
*c
, *result_list
;
948 /* The caller is beginning to accumulate a new set of completions, so
949 we need to find all of them now, and cache them for returning one at
950 a time on future calls. */
954 /* Free the storage used by LIST, but not by the strings inside.
955 This is because rl_complete_internal () frees the strings. */
961 /* Choose the default set of word break characters to break completions.
962 If we later find out that we are doing completions on command strings
963 (as opposed to strings supplied by the individual command completer
964 functions, which can be any string) then we will switch to the
965 special word break set for command strings, which leaves out the
966 '-' character used in some commands. */
968 rl_completer_word_break_characters
=
969 gdb_completer_word_break_characters
;
971 /* Decide whether to complete on a list of gdb commands or on symbols. */
972 tmp_command
= (char *) alloca (rl_point
+ 1);
975 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
976 tmp_command
[rl_point
] = '\0';
977 /* Since text always contains some number of characters leading up
978 to rl_point, we can find the equivalent position in tmp_command
979 by subtracting that many characters from the end of tmp_command. */
980 word
= tmp_command
+ rl_point
- strlen (text
);
984 /* An empty line we want to consider ambiguous; that is, it
985 could be any command. */
986 c
= (struct cmd_list_element
*) -1;
991 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
994 /* Move p up to the next interesting thing. */
995 while (*p
== ' ' || *p
== '\t')
1002 /* It is an unrecognized command. So there are no
1003 possible completions. */
1006 else if (c
== (struct cmd_list_element
*) -1)
1010 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1011 doesn't advance over that thing itself. Do so now. */
1013 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1015 if (q
!= tmp_command
+ rl_point
)
1017 /* There is something beyond the ambiguous
1018 command, so there are no possible completions. For
1019 example, "info t " or "info t foo" does not complete
1020 to anything, because "info t" can be "info target" or
1026 /* We're trying to complete on the command which was ambiguous.
1027 This we can deal with. */
1030 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1035 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1037 /* Insure that readline does the right thing with respect to
1038 inserting quotes. */
1039 rl_completer_word_break_characters
=
1040 gdb_completer_command_word_break_characters
;
1045 /* We've recognized a full command. */
1047 if (p
== tmp_command
+ rl_point
)
1049 /* There is no non-whitespace in the line beyond the command. */
1051 if (p
[-1] == ' ' || p
[-1] == '\t')
1053 /* The command is followed by whitespace; we need to complete
1054 on whatever comes after command. */
1057 /* It is a prefix command; what comes after it is
1058 a subcommand (e.g. "info "). */
1059 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1061 /* Insure that readline does the right thing
1062 with respect to inserting quotes. */
1063 rl_completer_word_break_characters
=
1064 gdb_completer_command_word_break_characters
;
1068 /* It is a normal command; what comes after it is
1069 completed by the command's completer function. */
1070 list
= (*c
->completer
) (p
, word
);
1075 /* The command is not followed by whitespace; we need to
1076 complete on the command itself. e.g. "p" which is a
1077 command itself but also can complete to "print", "ptype"
1081 /* Find the command we are completing on. */
1083 while (q
> tmp_command
)
1085 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1091 list
= complete_on_cmdlist (result_list
, q
, word
);
1093 /* Insure that readline does the right thing
1094 with respect to inserting quotes. */
1095 rl_completer_word_break_characters
=
1096 gdb_completer_command_word_break_characters
;
1101 /* There is non-whitespace beyond the command. */
1103 if (c
->prefixlist
&& !c
->allow_unknown
)
1105 /* It is an unrecognized subcommand of a prefix command,
1106 e.g. "info adsfkdj". */
1111 /* It is a normal command. */
1112 list
= (*c
->completer
) (p
, word
);
1118 /* If we found a list of potential completions during initialization then
1119 dole them out one at a time. The vector of completions is NULL
1120 terminated, so after returning the last one, return NULL (and continue
1121 to do so) each time we are called after that, until a new list is
1126 output
= list
[index
];
1134 /* Can't do this because readline hasn't yet checked the word breaks
1135 for figuring out whether to insert a quote. */
1137 /* Make sure the word break characters are set back to normal for the
1138 next time that readline tries to complete something. */
1139 rl_completer_word_break_characters
=
1140 gdb_completer_word_break_characters
;
1146 /* Skip over a possibly quoted word (as defined by the quote characters
1147 and word break characters the completer uses). Returns pointer to the
1148 location after the "word". */
1154 char quote_char
= '\0';
1157 for (scan
= str
; *scan
!= '\0'; scan
++)
1159 if (quote_char
!= '\0')
1161 /* Ignore everything until the matching close quote char */
1162 if (*scan
== quote_char
)
1164 /* Found matching close quote. */
1169 else if (strchr (gdb_completer_quote_characters
, *scan
))
1171 /* Found start of a quoted string. */
1174 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1188 #if STOP_SIGNAL == SIGTSTP
1189 signal (SIGTSTP
, SIG_DFL
);
1191 kill (getpid (), SIGTSTP
);
1192 signal (SIGTSTP
, stop_sig
);
1194 signal (STOP_SIGNAL
, stop_sig
);
1196 printf_unfiltered ("%s", prompt
);
1197 gdb_flush (gdb_stdout
);
1199 /* Forget about any previous command -- null line now will do nothing. */
1202 #endif /* STOP_SIGNAL */
1204 /* Initialize signal handlers. */
1214 signal (SIGINT
, request_quit
);
1216 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1217 passed to the inferior, which we don't want. It would be
1218 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1219 on BSD4.3 systems using vfork, that can affect the
1220 GDB process as well as the inferior (the signal handling tables
1221 might be in memory, shared between the two). Since we establish
1222 a handler for SIGQUIT, when we call exec it will set the signal
1223 to SIG_DFL for us. */
1224 signal (SIGQUIT
, do_nothing
);
1225 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1226 signal (SIGHUP
, disconnect
);
1227 signal (SIGFPE
, float_handler
);
1229 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1230 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1234 /* Read one line from the command input stream `instream'
1235 into the local static buffer `linebuffer' (whose current length
1237 The buffer is made bigger as necessary.
1238 Returns the address of the start of the line.
1240 NULL is returned for end of file.
1242 *If* the instream == stdin & stdin is a terminal, the line read
1243 is copied into the file line saver (global var char *line,
1244 length linesize) so that it can be duplicated.
1246 This routine either uses fancy command line editing or
1247 simple input as the user has requested. */
1250 command_line_input (prrompt
, repeat
, annotation_suffix
)
1253 char *annotation_suffix
;
1255 static char *linebuffer
= 0;
1256 static unsigned linelength
= 0;
1260 char *local_prompt
= prrompt
;
1265 if (annotation_level
> 1 && instream
== stdin
)
1267 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1268 + strlen (annotation_suffix
) + 40);
1269 if (prrompt
== NULL
)
1270 local_prompt
[0] = '\0';
1272 strcpy (local_prompt
, prrompt
);
1273 strcat (local_prompt
, "\n\032\032");
1274 strcat (local_prompt
, annotation_suffix
);
1275 strcat (local_prompt
, "\n");
1278 if (linebuffer
== 0)
1281 linebuffer
= (char *) xmalloc (linelength
);
1286 /* Control-C quits instantly if typed while in this loop
1287 since it should not wait until the user types a newline. */
1291 signal (STOP_SIGNAL
, stop_sig
);
1296 /* Make sure that all output has been output. Some machines may let
1297 you get away with leaving out some of the gdb_flush, but not all. */
1299 gdb_flush (gdb_stdout
);
1300 gdb_flush (gdb_stderr
);
1302 if (source_file_name
!= NULL
)
1304 ++source_line_number
;
1305 sprintf (source_error
,
1306 "%s%s:%d: Error in sourced command file:\n",
1309 source_line_number
);
1310 error_pre_print
= source_error
;
1313 if (annotation_level
> 1 && instream
== stdin
)
1315 printf_unfiltered ("\n\032\032pre-");
1316 printf_unfiltered (annotation_suffix
);
1317 printf_unfiltered ("\n");
1320 /* Don't use fancy stuff if not talking to stdin. */
1321 if (command_editing_p
&& instream
== stdin
1322 && ISATTY (instream
))
1323 rl
= readline (local_prompt
);
1325 rl
= gdb_readline (local_prompt
);
1327 if (annotation_level
> 1 && instream
== stdin
)
1329 printf_unfiltered ("\n\032\032post-");
1330 printf_unfiltered (annotation_suffix
);
1331 printf_unfiltered ("\n");
1334 if (!rl
|| rl
== (char *) EOF
)
1339 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1341 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1342 nline
= (char *) xrealloc (linebuffer
, linelength
);
1343 p
+= nline
- linebuffer
;
1347 /* Copy line. Don't copy null at end. (Leaves line alone
1348 if this was just a newline) */
1352 free (rl
); /* Allocated in readline. */
1354 if (p
== linebuffer
|| *(p
- 1) != '\\')
1357 p
--; /* Put on top of '\'. */
1358 local_prompt
= (char *) 0;
1363 signal (STOP_SIGNAL
, SIG_DFL
);
1370 #define SERVER_COMMAND_LENGTH 7
1372 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1373 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1376 /* Note that we don't set `line'. Between this and the check in
1377 dont_repeat, this insures that repeating will still do the
1380 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1383 /* Do history expansion if that is wished. */
1384 if (history_expansion_p
&& instream
== stdin
1385 && ISATTY (instream
))
1387 char *history_value
;
1390 *p
= '\0'; /* Insert null now. */
1391 expanded
= history_expand (linebuffer
, &history_value
);
1394 /* Print the changes. */
1395 printf_unfiltered ("%s\n", history_value
);
1397 /* If there was an error, call this function again. */
1400 free (history_value
);
1401 return command_line_input (prrompt
, repeat
, annotation_suffix
);
1403 if (strlen (history_value
) > linelength
)
1405 linelength
= strlen (history_value
) + 1;
1406 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1408 strcpy (linebuffer
, history_value
);
1409 p
= linebuffer
+ strlen(linebuffer
);
1410 free (history_value
);
1414 /* If we just got an empty line, and that is supposed
1415 to repeat the previous command, return the value in the
1419 if (p
== linebuffer
)
1422 while (*p1
== ' ' || *p1
== '\t')
1430 /* Add line to history if appropriate. */
1431 if (instream
== stdin
1432 && ISATTY (stdin
) && *linebuffer
)
1433 add_history (linebuffer
);
1435 /* Note: lines consisting solely of comments are added to the command
1436 history. This is useful when you type a command, and then
1437 realize you don't want to execute it quite yet. You can comment
1438 out the command and then later fetch it from the value history
1439 and remove the '#'. The kill ring is probably better, but some
1440 people are in the habit of commenting things out. */
1442 while ((c
= *p1
++) != '\0')
1445 while ((c
= *p1
++) != '"')
1447 /* Make sure an escaped '"' doesn't make us think the string
1455 while ((c
= *p1
++) != '\'')
1457 /* Make sure an escaped '\'' doesn't make us think the string
1466 /* Found a comment. */
1472 /* Save into global buffer if appropriate. */
1475 if (linelength
> linesize
)
1477 line
= xrealloc (line
, linelength
);
1478 linesize
= linelength
;
1480 strcpy (line
, linebuffer
);
1487 /* Read lines from the input stream
1488 and accumulate them in a chain of struct command_line's
1489 which is then returned. */
1491 struct command_line
*
1492 read_command_lines ()
1494 struct command_line
*first
= 0;
1495 register struct command_line
*next
, *tail
= 0;
1496 register char *p
, *p1
;
1497 struct cleanup
*old_chain
= 0;
1502 p
= command_line_input ((char *) NULL
, instream
== stdin
, "commands");
1504 /* Treat end of file like "end". */
1507 /* Remove leading and trailing blanks. */
1508 while (*p
== ' ' || *p
== '\t') p
++;
1509 p1
= p
+ strlen (p
);
1510 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1512 /* Is this "end"? */
1513 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1516 /* No => add this line to the chain of command lines. */
1517 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1518 next
->line
= savestring (p
, p1
- p
);
1526 /* We just read the first line.
1527 From now on, arrange to throw away the lines we have
1528 if we quit or get an error while inside this function. */
1530 old_chain
= make_cleanup (free_command_lines
, &first
);
1537 /* Now we are about to return the chain to our caller,
1538 so freeing it becomes his responsibility. */
1540 discard_cleanups (old_chain
);
1544 /* Free a chain of struct command_line's. */
1547 free_command_lines (lptr
)
1548 struct command_line
**lptr
;
1550 register struct command_line
*l
= *lptr
;
1551 register struct command_line
*next
;
1562 /* Add an element to the list of info subcommands. */
1565 add_info (name
, fun
, doc
)
1567 void (*fun
) PARAMS ((char *, int));
1570 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1573 /* Add an alias to the list of info subcommands. */
1576 add_info_alias (name
, oldname
, abbrev_flag
)
1581 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1584 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1585 Therefore, its own definition is called only for "info" with no args. */
1589 info_command (arg
, from_tty
)
1593 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
1594 help_list (infolist
, "info ", -1, gdb_stdout
);
1597 /* The "complete" command is used by Emacs to implement completion. */
1601 complete_command (arg
, from_tty
)
1612 rl_line_buffer
[0] = '\0';
1617 strcpy (rl_line_buffer
, arg
);
1618 rl_point
= strlen (arg
);
1621 for (completion
= symbol_completion_function (rl_line_buffer
, i
= 0);
1623 completion
= symbol_completion_function (rl_line_buffer
, ++i
))
1624 printf_unfiltered ("%s\n", completion
);
1627 /* The "show" command with no arguments shows all the settings. */
1631 show_command (arg
, from_tty
)
1635 cmd_show_list (showlist
, from_tty
, "");
1638 /* Add an element to the list of commands. */
1641 add_com (name
, class, fun
, doc
)
1643 enum command_class
class;
1644 void (*fun
) PARAMS ((char *, int));
1647 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1650 /* Add an alias or abbreviation command to the list of commands. */
1653 add_com_alias (name
, oldname
, class, abbrev_flag
)
1656 enum command_class
class;
1659 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
1666 error ("Argument required (%s).", why
);
1671 help_command (command
, from_tty
)
1673 int from_tty
; /* Ignored */
1675 help_cmd (command
, gdb_stdout
);
1679 validate_comname (comname
)
1685 error_no_arg ("name of command to define");
1690 if (!isalnum(*p
) && *p
!= '-')
1691 error ("Junk in argument list: \"%s\"", p
);
1696 /* This is just a placeholder in the command data structures. */
1698 user_defined_command (ignore
, from_tty
)
1705 define_command (comname
, from_tty
)
1709 register struct command_line
*cmds
;
1710 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
1711 char *tem
= comname
;
1712 #define HOOK_STRING "hook-"
1715 validate_comname (comname
);
1717 /* Look it up, and verify that we got an exact match. */
1718 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
1719 if (c
&& !STREQ (comname
, c
->name
))
1724 if (c
->class == class_user
|| c
->class == class_alias
)
1725 tem
= "Redefine command \"%s\"? ";
1727 tem
= "Really redefine built-in command \"%s\"? ";
1728 if (!query (tem
, c
->name
))
1729 error ("Command \"%s\" not redefined.", c
->name
);
1732 /* If this new command is a hook, then mark the command which it
1733 is hooking. Note that we allow hooking `help' commands, so that
1734 we can hook the `stop' pseudo-command. */
1736 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
1738 /* Look up cmd it hooks, and verify that we got an exact match. */
1739 tem
= comname
+HOOK_LEN
;
1740 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
1741 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
1745 warning ("Your new `%s' command does not hook any existing command.",
1747 if (!query ("Proceed? ", (char *)0))
1748 error ("Not confirmed.");
1752 comname
= savestring (comname
, strlen (comname
));
1754 /* If the rest of the commands will be case insensitive, this one
1755 should behave in the same manner. */
1756 for (tem
= comname
; *tem
; tem
++)
1757 if (isupper(*tem
)) *tem
= tolower(*tem
);
1761 printf_unfiltered ("Type commands for definition of \"%s\".\n\
1762 End with a line saying just \"end\".\n", comname
);
1763 gdb_flush (gdb_stdout
);
1766 cmds
= read_command_lines ();
1768 if (c
&& c
->class == class_user
)
1769 free_command_lines (&c
->user_commands
);
1771 newc
= add_cmd (comname
, class_user
, user_defined_command
,
1772 (c
&& c
->class == class_user
)
1773 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
1774 newc
->user_commands
= cmds
;
1776 /* If this new command is a hook, then mark both commands as being
1780 hookc
->hook
= newc
; /* Target gets hooked. */
1781 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
1786 document_command (comname
, from_tty
)
1790 struct command_line
*doclines
;
1791 register struct cmd_list_element
*c
;
1792 char *tem
= comname
;
1794 validate_comname (comname
);
1796 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
1798 if (c
->class != class_user
)
1799 error ("Command \"%s\" is built-in.", comname
);
1802 printf_unfiltered ("Type documentation for \"%s\".\n\
1803 End with a line saying just \"end\".\n", comname
);
1805 doclines
= read_command_lines ();
1807 if (c
->doc
) free (c
->doc
);
1810 register struct command_line
*cl1
;
1811 register int len
= 0;
1813 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1814 len
+= strlen (cl1
->line
) + 1;
1816 c
->doc
= (char *) xmalloc (len
+ 1);
1819 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1821 strcat (c
->doc
, cl1
->line
);
1823 strcat (c
->doc
, "\n");
1827 free_command_lines (&doclines
);
1831 print_gnu_advertisement ()
1833 printf_unfiltered ("\
1834 GDB is free software and you are welcome to distribute copies of it\n\
1835 under certain conditions; type \"show copying\" to see the conditions.\n\
1836 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
1841 print_gdb_version (stream
)
1844 fprintf_filtered (stream
, "\
1845 GDB %s (%s", version
, host_name
);
1847 if (!STREQ (host_name
, target_name
))
1848 fprintf_filtered (stream
, " --target %s", target_name
);
1850 fprintf_filtered (stream
, "), ");
1852 fprintf_filtered (stream
, "Copyright 1994 Free Software Foundation, Inc.");
1857 show_version (args
, from_tty
)
1862 print_gnu_advertisement ();
1863 print_gdb_version (gdb_stdout
);
1864 printf_filtered ("\n");
1868 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
1874 printf_unfiltered ("%s", prompt
);
1875 gdb_flush (gdb_stdout
);
1879 quit_command (args
, from_tty
)
1883 if (inferior_pid
!= 0 && target_has_execution
)
1887 if (query ("The program is running. Quit anyway (and detach it)? "))
1888 target_detach (args
, from_tty
);
1890 error ("Not confirmed.");
1894 if (query ("The program is running. Quit anyway (and kill it)? "))
1897 error ("Not confirmed.");
1900 /* UDI wants this, to kill the TIP. */
1903 /* Save the history information if it is appropriate to do so. */
1904 if (write_history_p
&& history_filename
)
1905 write_history (history_filename
);
1910 /* Returns whether GDB is running on a terminal and whether the user
1911 desires that questions be asked of them on that terminal. */
1914 input_from_terminal_p ()
1916 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
1921 pwd_command (args
, from_tty
)
1925 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
1926 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
1928 if (!STREQ (gdb_dirbuf
, current_directory
))
1929 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
1930 current_directory
, gdb_dirbuf
);
1932 printf_unfiltered ("Working directory %s.\n", current_directory
);
1936 cd_command (dir
, from_tty
)
1941 /* Found something other than leading repetitions of "/..". */
1942 int found_real_path
;
1945 /* If the new directory is absolute, repeat is a no-op; if relative,
1946 repeat might be useful but is more likely to be a mistake. */
1950 error_no_arg ("new working directory");
1952 dir
= tilde_expand (dir
);
1953 make_cleanup (free
, dir
);
1955 if (chdir (dir
) < 0)
1956 perror_with_name (dir
);
1959 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
1961 current_directory
= dir
;
1964 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
1965 current_directory
= concat (current_directory
, dir
, NULL
);
1967 current_directory
= concat (current_directory
, "/", dir
, NULL
);
1971 /* Now simplify any occurrences of `.' and `..' in the pathname. */
1973 found_real_path
= 0;
1974 for (p
= current_directory
; *p
;)
1976 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
1978 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
1979 && (p
[3] == 0 || p
[3] == '/'))
1981 if (found_real_path
)
1983 /* Search backwards for the directory just before the "/.."
1984 and obliterate it and the "/..". */
1986 while (q
!= current_directory
&& q
[-1] != '/')
1989 if (q
== current_directory
)
1990 /* current_directory is
1991 a relative pathname ("can't happen"--leave it alone). */
1995 strcpy (q
- 1, p
+ 3);
2000 /* We are dealing with leading repetitions of "/..", for example
2001 "/../..", which is the Mach super-root. */
2006 found_real_path
= 1;
2011 forget_cached_source_info ();
2014 pwd_command ((char *) 0, 1);
2017 struct source_cleanup_lines_args
{
2020 char *old_pre_error
;
2021 char *old_error_pre_print
;
2025 source_cleanup_lines (args
)
2028 struct source_cleanup_lines_args
*p
=
2029 (struct source_cleanup_lines_args
*)args
;
2030 source_line_number
= p
->old_line
;
2031 source_file_name
= p
->old_file
;
2032 source_pre_error
= p
->old_pre_error
;
2033 error_pre_print
= p
->old_error_pre_print
;
2038 source_command (args
, from_tty
)
2043 struct cleanup
*old_cleanups
;
2045 struct source_cleanup_lines_args old_lines
;
2050 error ("source command requires pathname of file to source.");
2053 file
= tilde_expand (file
);
2054 old_cleanups
= make_cleanup (free
, file
);
2056 stream
= fopen (file
, FOPEN_RT
);
2058 perror_with_name (file
);
2060 make_cleanup (fclose
, stream
);
2062 old_lines
.old_line
= source_line_number
;
2063 old_lines
.old_file
= source_file_name
;
2064 old_lines
.old_pre_error
= source_pre_error
;
2065 old_lines
.old_error_pre_print
= error_pre_print
;
2066 make_cleanup (source_cleanup_lines
, &old_lines
);
2067 source_line_number
= 0;
2068 source_file_name
= file
;
2069 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2070 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2071 make_cleanup (free
, source_pre_error
);
2072 /* This will get set every time we read a line. So it won't stay "" for
2074 error_pre_print
= "";
2076 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2077 if (source_error_allocated
< needed_length
)
2079 source_error_allocated
*= 2;
2080 if (source_error_allocated
< needed_length
)
2081 source_error_allocated
= needed_length
;
2082 if (source_error
== NULL
)
2083 source_error
= xmalloc (source_error_allocated
);
2085 source_error
= xrealloc (source_error
, source_error_allocated
);
2088 read_command_file (stream
);
2090 do_cleanups (old_cleanups
);
2095 echo_command (text
, from_tty
)
2103 while ((c
= *p
++) != '\0')
2107 /* \ at end of argument is used after spaces
2108 so they won't be lost. */
2112 c
= parse_escape (&p
);
2114 printf_filtered ("%c", c
);
2117 printf_filtered ("%c", c
);
2120 /* Force this output to appear now. */
2122 gdb_flush (gdb_stdout
);
2126 /* Functions to manipulate command line editing control variables. */
2128 /* Number of commands to print in each call to show_commands. */
2129 #define Hist_print 10
2131 show_commands (args
, from_tty
)
2135 /* Index for history commands. Relative to history_base. */
2138 /* Number of the history entry which we are planning to display next.
2139 Relative to history_base. */
2142 /* The first command in the history which doesn't exist (i.e. one more
2143 than the number of the last command). Relative to history_base. */
2146 extern HIST_ENTRY
*history_get
PARAMS ((int));
2148 /* Print out some of the commands from the command history. */
2149 /* First determine the length of the history list. */
2150 hist_len
= history_size
;
2151 for (offset
= 0; offset
< history_size
; offset
++)
2153 if (!history_get (history_base
+ offset
))
2162 if (args
[0] == '+' && args
[1] == '\0')
2163 /* "info editing +" should print from the stored position. */
2166 /* "info editing <exp>" should print around command number <exp>. */
2167 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2169 /* "show commands" means print the last Hist_print commands. */
2172 num
= hist_len
- Hist_print
;
2178 /* If there are at least Hist_print commands, we want to display the last
2179 Hist_print rather than, say, the last 6. */
2180 if (hist_len
- num
< Hist_print
)
2182 num
= hist_len
- Hist_print
;
2187 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2189 printf_filtered ("%5d %s\n", history_base
+ offset
,
2190 (history_get (history_base
+ offset
))->line
);
2193 /* The next command we want to display is the next one that we haven't
2197 /* If the user repeats this command with return, it should do what
2198 "show commands +" does. This is unnecessary if arg is null,
2199 because "show commands +" is not useful after "show commands". */
2200 if (from_tty
&& args
)
2207 /* Called by do_setshow_command. */
2210 set_history_size_command (args
, from_tty
, c
)
2213 struct cmd_list_element
*c
;
2215 if (history_size
== INT_MAX
)
2216 unstifle_history ();
2217 else if (history_size
>= 0)
2218 stifle_history (history_size
);
2221 history_size
= INT_MAX
;
2222 error ("History size must be non-negative");
2228 set_history (args
, from_tty
)
2232 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2233 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2238 show_history (args
, from_tty
)
2242 cmd_show_list (showhistlist
, from_tty
, "");
2245 int info_verbose
= 0; /* Default verbose msgs off */
2247 /* Called by do_setshow_command. An elaborate joke. */
2250 set_verbose (args
, from_tty
, c
)
2253 struct cmd_list_element
*c
;
2255 char *cmdname
= "verbose";
2256 struct cmd_list_element
*showcmd
;
2258 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2262 c
->doc
= "Set verbose printing of informational messages.";
2263 showcmd
->doc
= "Show verbose printing of informational messages.";
2267 c
->doc
= "Set verbosity.";
2268 showcmd
->doc
= "Show verbosity.";
2273 float_handler (signo
)
2276 /* This message is based on ANSI C, section 4.7. Note that integer
2277 divide by zero causes this, so "float" is a misnomer. */
2278 signal (SIGFPE
, float_handler
);
2279 error ("Erroneous arithmetic operation.");
2291 enablebreaklist
= NULL
;
2296 showhistlist
= NULL
;
2297 unsethistlist
= NULL
;
2298 #if MAINTENANCE_CMDS
2299 maintenancelist
= NULL
;
2300 maintenanceinfolist
= NULL
;
2301 maintenanceprintlist
= NULL
;
2303 setprintlist
= NULL
;
2304 showprintlist
= NULL
;
2305 setchecklist
= NULL
;
2306 showchecklist
= NULL
;
2309 /* Init the history buffer. Note that we are called after the init file(s)
2310 * have been read so that the user can change the history file via his
2311 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2312 * overrides all of this.
2320 tmpenv
= getenv ("HISTSIZE");
2322 history_size
= atoi (tmpenv
);
2323 else if (!history_size
)
2326 stifle_history (history_size
);
2328 tmpenv
= getenv ("GDBHISTFILE");
2330 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2331 else if (!history_filename
) {
2332 /* We include the current directory so that if the user changes
2333 directories the file written will be the same as the one
2335 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2337 read_history (history_filename
);
2343 struct cmd_list_element
*c
;
2345 #ifdef DEFAULT_PROMPT
2346 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2348 prompt
= savestring ("(gdb) ", 6);
2351 /* Set the important stuff up for command editing. */
2352 command_editing_p
= 1;
2353 history_expansion_p
= 0;
2354 write_history_p
= 0;
2356 /* Setup important stuff for command line editing. */
2357 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2358 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2359 rl_completer_quote_characters
= gdb_completer_quote_characters
;
2360 rl_readline_name
= "gdb";
2362 /* Define the classes of commands.
2363 They will appear in the help list in the reverse of this order. */
2365 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
2366 "Maintenance commands.\n\
2367 Some gdb commands are provided just for use by gdb maintainers.\n\
2368 These commands are subject to frequent change, and may not be as\n\
2369 well documented as user commands.",
2371 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2372 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2373 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2374 The commands in this class are those defined by the user.\n\
2375 Use the \"define\" command to define a command.", &cmdlist
);
2376 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2377 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2378 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2379 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2380 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2381 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2382 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2383 counting from zero for the innermost (currently executing) frame.\n\n\
2384 At any time gdb identifies one frame as the \"selected\" frame.\n\
2385 Variable lookups are done with respect to the selected frame.\n\
2386 When the program being debugged stops, gdb selects the innermost frame.\n\
2387 The commands below can be used to select other frames by number or address.",
2389 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2391 add_com ("pwd", class_files
, pwd_command
,
2392 "Print working directory. This is used for your program as well.");
2393 c
= add_cmd ("cd", class_files
, cd_command
,
2394 "Set working directory to DIR for debugger and program being debugged.\n\
2395 The change does not take effect for the program being debugged\n\
2396 until the next time it is started.", &cmdlist
);
2397 c
->completer
= filename_completer
;
2400 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2405 add_com ("echo", class_support
, echo_command
,
2406 "Print a constant string. Give string as argument.\n\
2407 C escape sequences may be used in the argument.\n\
2408 No newline is added at the end of the argument;\n\
2409 use \"\\n\" if you want a newline to be printed.\n\
2410 Since leading and trailing whitespace are ignored in command arguments,\n\
2411 if you want to print some you must use \"\\\" before leading whitespace\n\
2412 to be printed or after trailing whitespace.");
2413 add_com ("document", class_support
, document_command
,
2414 "Document a user-defined command.\n\
2415 Give command name as argument. Give documentation on following lines.\n\
2416 End with a line of just \"end\".");
2417 add_com ("define", class_support
, define_command
,
2418 "Define a new command name. Command name is argument.\n\
2419 Definition appears on following lines, one command per line.\n\
2420 End with a line of just \"end\".\n\
2421 Use the \"document\" command to give documentation for the new command.\n\
2422 Commands defined in this way do not take arguments.");
2425 c
= add_cmd ("source", class_support
, source_command
,
2426 "Read commands from a file named FILE.\n\
2427 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2428 when gdb is started.", &cmdlist
);
2430 /* Punt file name, we can't help it easily. */
2431 c
= add_cmd ("source", class_support
, source_command
,
2432 "Read commands from a file named FILE.\n\
2433 Note that the file \".gdbinit\" is read automatically in this way\n\
2434 when gdb is started.", &cmdlist
);
2436 c
->completer
= filename_completer
;
2438 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2439 add_com ("help", class_support
, help_command
, "Print list of commands.");
2440 add_com_alias ("q", "quit", class_support
, 1);
2441 add_com_alias ("h", "help", class_support
, 1);
2444 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2447 add_show_from_set (c
, &showlist
);
2448 c
->function
.sfunc
= set_verbose
;
2449 set_verbose (NULL
, 0, c
);
2452 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2453 "Set editing of command lines as they are typed.\n\
2454 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2455 Without an argument, command line editing is enabled. To edit, use\n\
2456 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2459 add_prefix_cmd ("history", class_support
, set_history
,
2460 "Generic command for setting command history parameters.",
2461 &sethistlist
, "set history ", 0, &setlist
);
2462 add_prefix_cmd ("history", class_support
, show_history
,
2463 "Generic command for showing command history parameters.",
2464 &showhistlist
, "show history ", 0, &showlist
);
2467 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2468 "Set history expansion on command input.\n\
2469 Without an argument, history expansion is enabled.", &sethistlist
),
2473 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2474 "Set saving of the history record on exit.\n\
2475 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2476 Without an argument, saving is enabled.", &sethistlist
),
2479 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
2480 "Set the size of the command history, \n\
2481 ie. the number of previous commands to keep a record of.", &sethistlist
);
2482 add_show_from_set (c
, &showhistlist
);
2483 c
->function
.sfunc
= set_history_size_command
;
2486 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2487 "Set the filename in which to record the command history\n\
2488 (the list of previous commands of which a record is kept).", &sethistlist
),
2492 (add_set_cmd ("confirm", class_support
, var_boolean
,
2494 "Set whether to confirm potentially dangerous operations.",
2498 add_prefix_cmd ("info", class_info
, info_command
,
2499 "Generic command for showing things about the program being debugged.",
2500 &infolist
, "info ", 0, &cmdlist
);
2501 add_com_alias ("i", "info", class_info
, 1);
2503 add_com ("complete", class_obscure
, complete_command
,
2504 "List the completions for the rest of the line as a command.");
2506 add_prefix_cmd ("show", class_info
, show_command
,
2507 "Generic command for showing things about the debugger.",
2508 &showlist
, "show ", 0, &cmdlist
);
2509 /* Another way to get at the same thing. */
2510 add_info ("set", show_command
, "Show all GDB settings.");
2512 add_cmd ("commands", no_class
, show_commands
,
2513 "Show the the history of commands you typed.\n\
2514 You can supply a command number to start with, or a `+' to start after\n\
2515 the previous command number shown.",
2518 add_cmd ("version", no_class
, show_version
,
2519 "Show what version of GDB this is.", &showlist
);
2521 /* If target is open when baud changes, it doesn't take effect until the
2522 next open (I think, not sure). */
2523 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
2524 var_zinteger
, (char *)&baud_rate
,
2525 "Set baud rate for remote serial I/O.\n\
2526 This value is used to set the speed of the serial port when debugging\n\
2527 using remote targets.", &setlist
),
2531 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
2532 "Set debugging of remote protocol.\n\
2533 When enabled, each packet sent or received with the remote target\n\
2534 is displayed.", &setlist
),