1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
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"
33 #include "terminal.h" /* For job_control. */
38 /* readline include files */
42 /* readline defines this. */
45 #include <sys/types.h>
47 /* What is this for? X_OK? */
55 #include <sys/param.h>
59 extern void initialize_targets
PARAMS ((void));
61 extern void initialize_utils
PARAMS ((void));
63 /* Prototypes for local functions */
65 static char * line_completion_function
PARAMS ((char *, int, char *, int));
67 static char * readline_line_completion_function
PARAMS ((char *, int));
69 static void command_loop_marker
PARAMS ((int));
71 static void while_command
PARAMS ((char *, int));
73 static void if_command
PARAMS ((char *, int));
75 static struct command_line
*
76 build_command_line
PARAMS ((enum command_control_type
, char *));
78 static struct command_line
*
79 get_command_line
PARAMS ((enum command_control_type
, char *));
81 static void realloc_body_list
PARAMS ((struct command_line
*, int));
83 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
85 static enum command_control_type
86 recurse_read_control_structure
PARAMS ((struct command_line
*));
88 static struct cleanup
* setup_user_args
PARAMS ((char *));
90 static char * locate_arg
PARAMS ((char *));
92 static char * insert_args
PARAMS ((char *));
94 static void arg_cleanup
PARAMS ((void));
96 static void init_main
PARAMS ((void));
98 static void init_cmd_lists
PARAMS ((void));
100 static void float_handler
PARAMS ((int));
102 static void init_signals
PARAMS ((void));
104 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
106 #ifdef TARGET_BYTE_ORDER_SELECTABLE
108 static void set_endian
PARAMS ((char *, int));
110 static void set_endian_big
PARAMS ((char *, int));
112 static void set_endian_little
PARAMS ((char *, int));
114 static void set_endian_auto
PARAMS ((char *, int));
116 static void show_endian
PARAMS ((char *, int));
120 static void show_history
PARAMS ((char *, int));
122 static void set_history
PARAMS ((char *, int));
124 static void set_history_size_command
PARAMS ((char *, int,
125 struct cmd_list_element
*));
127 static void show_commands
PARAMS ((char *, int));
129 static void echo_command
PARAMS ((char *, int));
131 static void pwd_command
PARAMS ((char *, int));
133 static void show_version
PARAMS ((char *, int));
135 static void document_command
PARAMS ((char *, int));
137 static void define_command
PARAMS ((char *, int));
139 static void validate_comname
PARAMS ((char *));
141 static void help_command
PARAMS ((char *, int));
143 static void show_command
PARAMS ((char *, int));
145 static void info_command
PARAMS ((char *, int));
147 static void complete_command
PARAMS ((char *, int));
149 static void do_nothing
PARAMS ((int));
151 static int quit_cover
PARAMS ((char *));
153 static void disconnect
PARAMS ((int));
155 static void source_cleanup
PARAMS ((FILE *));
157 /* If this definition isn't overridden by the header files, assume
158 that isatty and fileno exist on this system. */
160 #define ISATTY(FP) (isatty (fileno (FP)))
163 /* Initialization file name for gdb. This is overridden in some configs. */
165 #ifndef GDBINIT_FILENAME
166 #define GDBINIT_FILENAME ".gdbinit"
168 char gdbinit
[] = GDBINIT_FILENAME
;
170 int inhibit_gdbinit
= 0;
172 /* If nonzero, and GDB has been configured to be able to use windows,
173 attempt to open them upon startup. */
177 /* Version number of GDB, as a string. */
179 extern char *version
;
181 /* Canonical host name as a string. */
183 extern char *host_name
;
185 /* Canonical target name as a string. */
187 extern char *target_name
;
189 extern char lang_frame_mismatch_warn
[]; /* language.c */
191 /* Flag for whether we want all the "from_tty" gubbish printed. */
193 int caution
= 1; /* Default is yes, sigh. */
195 /* Define all cmd_list_elements. */
197 /* Chain containing all defined commands. */
199 struct cmd_list_element
*cmdlist
;
201 /* Chain containing all defined info subcommands. */
203 struct cmd_list_element
*infolist
;
205 /* Chain containing all defined enable subcommands. */
207 struct cmd_list_element
*enablelist
;
209 /* Chain containing all defined disable subcommands. */
211 struct cmd_list_element
*disablelist
;
213 /* Chain containing all defined delete subcommands. */
215 struct cmd_list_element
*deletelist
;
217 /* Chain containing all defined "enable breakpoint" subcommands. */
219 struct cmd_list_element
*enablebreaklist
;
221 /* Chain containing all defined set subcommands */
223 struct cmd_list_element
*setlist
;
225 /* Chain containing all defined unset subcommands */
227 struct cmd_list_element
*unsetlist
;
229 /* Chain containing all defined show subcommands. */
231 struct cmd_list_element
*showlist
;
233 #ifdef TARGET_BYTE_ORDER_SELECTABLE
234 /* Chain containing the \"set endian\" commands. */
236 struct cmd_list_element
*endianlist
;
239 /* Chain containing all defined \"set history\". */
241 struct cmd_list_element
*sethistlist
;
243 /* Chain containing all defined \"show history\". */
245 struct cmd_list_element
*showhistlist
;
247 /* Chain containing all defined \"unset history\". */
249 struct cmd_list_element
*unsethistlist
;
251 /* Chain containing all defined maintenance subcommands. */
254 struct cmd_list_element
*maintenancelist
;
257 /* Chain containing all defined "maintenance info" subcommands. */
260 struct cmd_list_element
*maintenanceinfolist
;
263 /* Chain containing all defined "maintenance print" subcommands. */
266 struct cmd_list_element
*maintenanceprintlist
;
269 struct cmd_list_element
*setprintlist
;
271 struct cmd_list_element
*showprintlist
;
273 struct cmd_list_element
*setchecklist
;
275 struct cmd_list_element
*showchecklist
;
277 /* stdio stream that command input is being read from. Set to stdin normally.
278 Set by source_command to the file we are sourcing. Set to NULL if we are
279 executing a user-defined command. */
283 /* Current working directory. */
285 char *current_directory
;
287 /* The directory name is actually stored here (usually). */
288 char gdb_dirbuf
[1024];
290 /* Function to call before reading a command, if nonzero.
291 The function receives two args: an input stream,
292 and a prompt string. */
294 void (*window_hook
) PARAMS ((FILE *, char *));
299 /* gdb prints this when reading a command interactively */
302 /* Buffer used for reading command lines, and the size
303 allocated for it so far. */
308 /* Nonzero if the current command is modified by "server ". This
309 affects things like recording into the command history, comamnds
310 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
311 whatever) can issue its own commands and also send along commands
312 from the user, and have the user not notice that the user interface
313 is issuing commands too. */
316 /* Baud rate specified for talking to serial target systems. Default
317 is left as -1, so targets can choose their own defaults. */
318 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
319 or (unsigned int)-1. This is a Bad User Interface. */
323 /* Non-zero tells remote* modules to output debugging info. */
325 int remote_debug
= 0;
327 /* Level of control structure. */
328 static int control_level
;
330 /* Structure for arguments to user defined functions. */
331 #define MAXUSERARGS 10
334 struct user_args
*next
;
343 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
347 #define STOP_SIGNAL SIGTSTP
348 static void stop_sig
PARAMS ((int));
352 /* Some System V have job control but not sigsetmask(). */
353 #if !defined (HAVE_SIGSETMASK)
355 #define HAVE_SIGSETMASK 1
357 #define HAVE_SIGSETMASK 0
361 #if 0 == (HAVE_SIGSETMASK)
362 #define sigsetmask(n)
365 /* Hooks for alternate command interfaces. */
367 /* Called after most modules have been initialized, but before taking users
370 void (*init_ui_hook
) PARAMS ((void));
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));
377 /* Called instead of fputs for all output. */
379 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
381 /* Called from print_frame_info to list the line we stopped in. */
383 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
384 int stopline
, int noerror
));
385 /* Replaces most of query. */
387 int (*query_hook
) PARAMS (());
389 /* Called from gdb_flush to flush output. */
391 void (*flush_hook
) PARAMS ((FILE *stream
));
393 /* Called as appropriate to notify the interface of the specified breakpoint
396 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
397 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
398 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
400 /* Called during long calculations to allow GUI to repair window damage, and to
401 check for stop buttons, etc... */
403 void (*interactive_hook
) PARAMS ((void));
405 /* Called when the registers have changed, as a hint to a GUI
406 to minimize window update. */
408 void (*registers_changed_hook
) PARAMS ((void));
410 /* Called when going to wait for the target. Usually allows the GUI to run
411 while waiting for target events. */
413 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
415 /* Used by UI as a wrapper around command execution. May do various things
416 like enabling/disabling buttons, etc... */
418 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
421 /* Takes control from error (). Typically used to prevent longjmps out of the
422 middle of the GUI. Usually used in conjunction with a catch routine. */
424 NORETURN
void (*error_hook
) PARAMS (());
427 /* Where to go for return_to_top_level (RETURN_ERROR). */
428 jmp_buf error_return
;
429 /* Where to go for return_to_top_level (RETURN_QUIT). */
432 /* Return for reason REASON. This generally gets back to the command
433 loop, but can be caught via catch_errors. */
436 return_to_top_level (reason
)
437 enum return_reason reason
;
442 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
443 I can think of a reason why that is vital, though). */
444 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
446 disable_current_display ();
447 do_cleanups (ALL_CLEANUPS
);
449 if (annotation_level
> 1)
460 (NORETURN
void) longjmp
461 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
464 /* Call FUNC with arg ARGS, catching any errors. If there is no
465 error, return the value returned by FUNC. If there is an error,
466 print ERRSTRING, print the specific error message, then return
469 Must not be called with immediate_quit in effect (bad things might
470 happen, say we got a signal in the middle of a memcpy to quit_return).
471 This is an OK restriction; with very few exceptions immediate_quit can
472 be replaced by judicious use of QUIT.
474 MASK specifies what to catch; it is normally set to
475 RETURN_MASK_ALL, if for no other reason than that the code which
476 calls catch_errors might not be set up to deal with a quit which
477 isn't caught. But if the code can deal with it, it generally
478 should be RETURN_MASK_ERROR, unless for some reason it is more
479 useful to abort only the portion of the operation inside the
480 catch_errors. Note that quit should return to the command line
481 fairly quickly, even if some further processing is being done. */
484 catch_errors (func
, args
, errstring
, mask
)
485 int (*func
) PARAMS ((char *));
494 struct cleanup
*saved_cleanup_chain
;
495 char *saved_error_pre_print
;
496 char *saved_quit_pre_print
;
498 saved_cleanup_chain
= save_cleanups ();
499 saved_error_pre_print
= error_pre_print
;
500 saved_quit_pre_print
= quit_pre_print
;
502 if (mask
& RETURN_MASK_ERROR
)
504 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
505 error_pre_print
= errstring
;
507 if (mask
& RETURN_MASK_QUIT
)
509 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
510 quit_pre_print
= errstring
;
513 if (setjmp (tmp_jmp
) == 0)
515 if (mask
& RETURN_MASK_ERROR
)
516 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
517 if (mask
& RETURN_MASK_QUIT
)
518 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
519 val
= (*func
) (args
);
524 restore_cleanups (saved_cleanup_chain
);
526 if (mask
& RETURN_MASK_ERROR
)
528 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
529 error_pre_print
= saved_error_pre_print
;
531 if (mask
& RETURN_MASK_QUIT
)
533 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
534 quit_pre_print
= saved_quit_pre_print
;
539 /* Handler for SIGHUP. */
545 catch_errors (quit_cover
, NULL
,
546 "Could not kill the program being debugged", RETURN_MASK_ALL
);
547 signal (SIGHUP
, SIG_DFL
);
548 kill (getpid (), SIGHUP
);
551 /* Just a little helper function for disconnect(). */
557 caution
= 0; /* Throw caution to the wind -- we're exiting.
558 This prevents asking the user dumb questions. */
559 quit_command((char *)0, 0);
563 /* Line number we are currently in in a file which is being sourced. */
564 static int source_line_number
;
566 /* Name of the file we are sourcing. */
567 static char *source_file_name
;
569 /* Buffer containing the error_pre_print used by the source stuff.
571 static char *source_error
;
572 static int source_error_allocated
;
574 /* Something to glom on to the start of error_pre_print if source_file_name
576 static char *source_pre_error
;
578 /* Clean up on error during a "source" command (or execution of a
579 user-defined command). */
582 source_cleanup (stream
)
585 /* Restore the previous input stream. */
589 /* Read commands from STREAM. */
591 read_command_file (stream
)
594 struct cleanup
*cleanups
;
596 cleanups
= make_cleanup (source_cleanup
, instream
);
599 do_cleanups (cleanups
);
602 extern void init_proc ();
604 void (*pre_init_ui_hook
) PARAMS ((void));
609 if (pre_init_ui_hook
)
612 /* Run the init function of each source file */
614 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
615 current_directory
= gdb_dirbuf
;
617 init_cmd_lists (); /* This needs to be done first */
618 initialize_targets (); /* Setup target_terminal macros for utils.c */
619 initialize_utils (); /* Make errors and warnings possible */
620 initialize_all_files ();
621 init_main (); /* But that omits this file! Do it now */
626 /* We need a default language for parsing expressions, so simple things like
627 "set width 0" won't fail if no language is explicitly set in a config file
628 or implicitly set by reading an executable during startup. */
629 set_language (language_c
);
630 expected_language
= current_language
; /* don't warn about the change. */
636 /* Allocate, initialize a new command line structure for one of the
637 control commands (if/while). */
639 static struct command_line
*
640 build_command_line (type
, args
)
641 enum command_control_type type
;
644 struct command_line
*cmd
;
646 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
648 cmd
->control_type
= type
;
652 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
654 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
655 cmd
->line
= savestring (args
, strlen (args
));
659 /* Build and return a new command structure for the control commands
660 such as "if" and "while". */
662 static struct command_line
*
663 get_command_line (type
, arg
)
664 enum command_control_type type
;
667 struct command_line
*cmd
;
668 struct cleanup
*old_chain
= NULL
;
670 /* Allocate and build a new command line structure. */
671 cmd
= build_command_line (type
, arg
);
673 old_chain
= make_cleanup (free_command_lines
, &cmd
);
675 /* Read in the body of this command. */
676 if (recurse_read_control_structure (cmd
) == invalid_control
)
678 warning ("error reading in control structure\n");
679 do_cleanups (old_chain
);
683 discard_cleanups (old_chain
);
687 /* Recursively print a command (including full control structures). */
689 print_command_line (cmd
, depth
)
690 struct command_line
*cmd
;
697 for (i
= 0; i
< depth
; i
++)
698 fputs_filtered (" ", gdb_stdout
);
701 /* A simple command, print it and return. */
702 if (cmd
->control_type
== simple_control
)
704 fputs_filtered (cmd
->line
, gdb_stdout
);
705 fputs_filtered ("\n", gdb_stdout
);
709 /* loop_continue to jump to the start of a while loop, print it
711 if (cmd
->control_type
== continue_control
)
713 fputs_filtered ("loop_continue\n", gdb_stdout
);
717 /* loop_break to break out of a while loop, print it and return. */
718 if (cmd
->control_type
== break_control
)
720 fputs_filtered ("loop_break\n", gdb_stdout
);
724 /* A while command. Recursively print its subcommands before returning. */
725 if (cmd
->control_type
== while_control
)
727 struct command_line
*list
;
728 fputs_filtered ("while ", gdb_stdout
);
729 fputs_filtered (cmd
->line
, gdb_stdout
);
730 fputs_filtered ("\n", gdb_stdout
);
731 list
= *cmd
->body_list
;
734 print_command_line (list
, depth
+ 1);
739 /* An if command. Recursively print both arms before returning. */
740 if (cmd
->control_type
== if_control
)
742 fputs_filtered ("if ", gdb_stdout
);
743 fputs_filtered (cmd
->line
, gdb_stdout
);
744 fputs_filtered ("\n", gdb_stdout
);
746 print_command_line (cmd
->body_list
[0], depth
+ 1);
748 /* Show the false arm if it exists. */
749 if (cmd
->body_count
== 2)
753 for (i
= 0; i
< depth
; i
++)
754 fputs_filtered (" ", gdb_stdout
);
756 fputs_filtered ("else\n", gdb_stdout
);
757 print_command_line (cmd
->body_list
[1], depth
+ 1);
761 for (i
= 0; i
< depth
; i
++)
762 fputs_filtered (" ", gdb_stdout
);
764 fputs_filtered ("end\n", gdb_stdout
);
768 /* Execute the command in CMD. */
770 enum command_control_type
771 execute_control_command (cmd
)
772 struct command_line
*cmd
;
774 struct expression
*expr
;
775 struct command_line
*current
;
776 struct cleanup
*old_chain
= 0;
779 enum command_control_type ret
;
782 switch (cmd
->control_type
)
785 /* A simple command, execute it and return. */
786 new_line
= insert_args (cmd
->line
);
788 return invalid_control
;
789 old_chain
= make_cleanup (free_current_contents
, &new_line
);
790 execute_command (new_line
, 0);
791 ret
= cmd
->control_type
;
794 case continue_control
:
796 /* Return for "continue", and "break" so we can either
797 continue the loop at the top, or break out. */
798 ret
= cmd
->control_type
;
803 /* Parse the loop control expression for the while statement. */
804 new_line
= insert_args (cmd
->line
);
806 return invalid_control
;
807 old_chain
= make_cleanup (free_current_contents
, &new_line
);
808 expr
= parse_expression (new_line
);
809 make_cleanup (free_current_contents
, &expr
);
811 ret
= simple_control
;
814 /* Keep iterating so long as the expression is true. */
817 /* Evaluate the expression. */
818 val
= evaluate_expression (expr
);
820 /* If the value is false, then break out of the loop. */
821 if (!value_true (val
))
824 /* Execute the body of the while statement. */
825 current
= *cmd
->body_list
;
828 ret
= execute_control_command (current
);
830 /* If we got an error, or a "break" command, then stop
832 if (ret
== invalid_control
|| ret
== break_control
)
838 /* If we got a "continue" command, then restart the loop
840 if (ret
== continue_control
)
843 /* Get the next statement. */
844 current
= current
->next
;
848 /* Reset RET so that we don't recurse the break all the way down. */
849 if (ret
== break_control
)
850 ret
= simple_control
;
857 new_line
= insert_args (cmd
->line
);
859 return invalid_control
;
860 old_chain
= make_cleanup (free_current_contents
, &new_line
);
861 /* Parse the conditional for the if statement. */
862 expr
= parse_expression (new_line
);
863 make_cleanup (free_current_contents
, &expr
);
866 ret
= simple_control
;
868 /* Evaluate the conditional. */
869 val
= evaluate_expression (expr
);
871 /* Choose which arm to take commands from based on the value of the
872 conditional expression. */
873 if (value_true (val
))
874 current
= *cmd
->body_list
;
875 else if (cmd
->body_count
== 2)
876 current
= *(cmd
->body_list
+ 1);
878 /* Execute commands in the given arm. */
881 ret
= execute_control_command (current
);
883 /* If we got an error, get out. */
884 if (ret
!= simple_control
)
887 /* Get the next statement in the body. */
888 current
= current
->next
;
895 warning ("Invalid control type in command structure.");
896 return invalid_control
;
900 do_cleanups (old_chain
);
905 /* "while" command support. Executes a body of statements while the
906 loop condition is nonzero. */
909 while_command (arg
, from_tty
)
913 struct command_line
*command
= NULL
;
916 command
= get_command_line (while_control
, arg
);
921 execute_control_command (command
);
922 free_command_lines (&command
);
925 /* "if" command support. Execute either the true or false arm depending
926 on the value of the if conditional. */
929 if_command (arg
, from_tty
)
933 struct command_line
*command
= NULL
;
936 command
= get_command_line (if_control
, arg
);
941 execute_control_command (command
);
942 free_command_lines (&command
);
949 struct user_args
*oargs
= user_args
;
951 fatal ("Internal error, arg_cleanup called with no user args.\n");
953 user_args
= user_args
->next
;
957 /* Bind the incomming arguments for a user defined command to
958 $arg0, $arg1 ... $argMAXUSERARGS. */
960 static struct cleanup
*
964 struct user_args
*args
;
965 struct cleanup
*old_chain
;
966 unsigned int arg_count
= 0;
968 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
969 memset (args
, 0, sizeof (struct user_args
));
971 args
->next
= user_args
;
974 old_chain
= make_cleanup (arg_cleanup
, 0);
983 if (arg_count
>= MAXUSERARGS
)
985 error ("user defined function may only have %d arguments.\n",
990 /* Strip whitespace. */
991 while (*p
== ' ' || *p
== '\t')
994 /* P now points to an argument. */
996 user_args
->a
[arg_count
].arg
= p
;
998 /* Get to the end of this argument. */
999 while (*p
&& *p
!= ' ' && *p
!= '\t')
1002 user_args
->a
[arg_count
].len
= p
- start_arg
;
1009 /* Given character string P, return a point to the first argument ($arg),
1010 or NULL if P contains no arguments. */
1016 while ((p
= strchr (p
, '$')))
1018 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1025 /* Insert the user defined arguments stored in user_arg into the $arg
1026 arguments found in line, with the updated copy being placed into nline. */
1032 char *p
, *save_line
, *new_line
;
1035 /* First we need to know how much memory to allocate for the new line. */
1038 while ((p
= locate_arg (line
)))
1043 if (i
>= user_args
->count
)
1045 error ("Missing argument %d in user function.\n", i
);
1048 len
+= user_args
->a
[i
].len
;
1052 /* Don't forget the tail. */
1053 len
+= strlen (line
);
1055 /* Allocate space for the new line and fill it in. */
1056 new_line
= (char *)xmalloc (len
+ 1);
1057 if (new_line
== NULL
)
1060 /* Restore pointer to beginning of old line. */
1063 /* Save pointer to beginning of new line. */
1064 save_line
= new_line
;
1066 while ((p
= locate_arg (line
)))
1070 memcpy (new_line
, line
, p
- line
);
1071 new_line
+= p
- line
;
1074 len
= user_args
->a
[i
].len
;
1077 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1082 /* Don't forget the tail. */
1083 strcpy (new_line
, line
);
1085 /* Return a pointer to the beginning of the new line. */
1090 execute_user_command (c
, args
)
1091 struct cmd_list_element
*c
;
1094 register struct command_line
*cmdlines
;
1095 struct cleanup
*old_chain
;
1096 enum command_control_type ret
;
1098 old_chain
= setup_user_args (args
);
1100 cmdlines
= c
->user_commands
;
1105 /* Set the instream to 0, indicating execution of a
1106 user-defined function. */
1107 old_chain
= make_cleanup (source_cleanup
, instream
);
1108 instream
= (FILE *) 0;
1111 ret
= execute_control_command (cmdlines
);
1112 if (ret
!= simple_control
&& ret
!= break_control
)
1114 warning ("Error in control structure.\n");
1117 cmdlines
= cmdlines
->next
;
1119 do_cleanups (old_chain
);
1122 /* Execute the line P as a command.
1123 Pass FROM_TTY as second argument to the defining function. */
1126 execute_command (p
, from_tty
)
1130 register struct cmd_list_element
*c
;
1131 register enum language flang
;
1132 static int warned
= 0;
1136 /* This can happen when command_line_input hits end of file. */
1140 while (*p
== ' ' || *p
== '\t') p
++;
1145 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1146 /* Pass null arg rather than an empty one. */
1149 /* If this command has been hooked, run the hook first. */
1151 execute_user_command (c
->hook
, (char *)0);
1153 if (c
->class == class_user
)
1154 execute_user_command (c
, arg
);
1155 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1156 do_setshow_command (arg
, from_tty
& caution
, c
);
1157 else if (c
->function
.cfunc
== NO_FUNCTION
)
1158 error ("That is not a command, just a help topic.");
1159 else if (call_command_hook
)
1160 call_command_hook (c
, arg
, from_tty
& caution
);
1162 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1165 /* Tell the user if the language has changed (except first time). */
1166 if (current_language
!= expected_language
)
1168 if (language_mode
== language_mode_auto
) {
1169 language_info (1); /* Print what changed. */
1174 /* Warn the user if the working language does not match the
1175 language of the current frame. Only warn the user if we are
1176 actually running the program, i.e. there is a stack. */
1177 /* FIXME: This should be cacheing the frame and only running when
1178 the frame changes. */
1180 if (target_has_stack
)
1182 flang
= get_frame_language ();
1184 && flang
!= language_unknown
1185 && flang
!= current_language
->la_language
)
1187 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1195 command_loop_marker (foo
)
1200 /* Read commands from `instream' and execute them
1201 until end of file or error reading instream. */
1206 struct cleanup
*old_chain
;
1208 int stdin_is_tty
= ISATTY (stdin
);
1209 long time_at_cmd_start
;
1210 long space_at_cmd_start
;
1211 extern int display_time
;
1212 extern int display_space
;
1214 while (!feof (instream
))
1216 if (window_hook
&& instream
== stdin
)
1217 (*window_hook
) (instream
, prompt
);
1220 if (instream
== stdin
&& stdin_is_tty
)
1221 reinitialize_more_filter ();
1222 old_chain
= make_cleanup (command_loop_marker
, 0);
1223 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1224 instream
== stdin
, "prompt");
1228 time_at_cmd_start
= get_run_time ();
1232 extern char **environ
;
1233 char *lim
= (char *) sbrk (0);
1235 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1238 execute_command (command
, instream
== stdin
);
1239 /* Do any commands attached to breakpoint we stopped at. */
1240 bpstat_do_actions (&stop_bpstat
);
1241 do_cleanups (old_chain
);
1245 long cmd_time
= get_run_time () - time_at_cmd_start
;
1247 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1248 cmd_time
/ 1000000, cmd_time
% 1000000);
1253 extern char **environ
;
1254 char *lim
= (char *) sbrk (0);
1255 long space_now
= lim
- (char *) &environ
;
1256 long space_diff
= space_now
- space_at_cmd_start
;
1258 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1260 (space_diff
>= 0 ? '+' : '-'),
1266 /* Commands call this if they do not want to be repeated by null lines. */
1274 /* If we aren't reading from standard input, we are saving the last
1275 thing read from stdin in line and don't want to delete it. Null lines
1276 won't repeat here in any case. */
1277 if (instream
== stdin
)
1281 /* Read a line from the stream "instream" without command line editing.
1283 It prints PRROMPT once at the start.
1284 Action is compatible with "readline", e.g. space for the result is
1285 malloc'd and should be freed by the caller.
1287 A NULL return means end of file. */
1289 gdb_readline (prrompt
)
1294 int input_index
= 0;
1295 int result_size
= 80;
1299 /* Don't use a _filtered function here. It causes the assumed
1300 character position to be off, since the newline we read from
1301 the user is not accounted for. */
1302 fputs_unfiltered (prrompt
, gdb_stdout
);
1303 /* start-sanitize-mpw */
1305 /* Move to a new line so the entered line doesn't have a prompt
1306 on the front of it. */
1307 fputs_unfiltered ("\n", gdb_stdout
);
1309 /* end-sanitize-mpw */
1310 gdb_flush (gdb_stdout
);
1313 result
= (char *) xmalloc (result_size
);
1317 /* Read from stdin if we are executing a user defined command.
1318 This is the right thing for prompt_for_continue, at least. */
1319 c
= fgetc (instream
? instream
: stdin
);
1323 if (input_index
> 0)
1324 /* The last line does not end with a newline. Return it, and
1325 if we are called again fgetc will still return EOF and
1326 we'll return NULL then. */
1335 result
[input_index
++] = c
;
1336 while (input_index
>= result_size
)
1339 result
= (char *) xrealloc (result
, result_size
);
1343 result
[input_index
++] = '\0';
1347 /* Variables which control command line editing and history
1348 substitution. These variables are given default values at the end
1350 static int command_editing_p
;
1351 static int history_expansion_p
;
1352 static int write_history_p
;
1353 static int history_size
;
1354 static char *history_filename
;
1356 /* readline uses the word breaks for two things:
1357 (1) In figuring out where to point the TEXT parameter to the
1358 rl_completion_entry_function. Since we don't use TEXT for much,
1359 it doesn't matter a lot what the word breaks are for this purpose, but
1360 it does affect how much stuff M-? lists.
1361 (2) If one of the matches contains a word break character, readline
1362 will quote it. That's why we switch between
1363 gdb_completer_word_break_characters and
1364 gdb_completer_command_word_break_characters. I'm not sure when
1365 we need this behavior (perhaps for funky characters in C++ symbols?). */
1367 /* Variables which are necessary for fancy command line editing. */
1368 char *gdb_completer_word_break_characters
=
1369 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1371 /* When completing on command names, we remove '-' from the list of
1372 word break characters, since we use it in command names. If the
1373 readline library sees one in any of the current completion strings,
1374 it thinks that the string needs to be quoted and automatically supplies
1376 char *gdb_completer_command_word_break_characters
=
1377 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1379 /* Characters that can be used to quote completion strings. Note that we
1380 can't include '"' because the gdb C parser treats such quoted sequences
1382 char *gdb_completer_quote_characters
=
1385 /* Functions that are used as part of the fancy command line editing. */
1387 /* This can be used for functions which don't want to complete on symbols
1388 but don't want to complete on anything else either. */
1391 noop_completer (text
, prefix
)
1398 /* Complete on filenames. */
1400 filename_completer (text
, word
)
1404 /* From readline. */
1405 extern char *filename_completion_function ();
1406 int subsequent_name
;
1408 int return_val_used
;
1409 int return_val_alloced
;
1411 return_val_used
= 0;
1412 /* Small for testing. */
1413 return_val_alloced
= 1;
1414 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1416 subsequent_name
= 0;
1420 p
= filename_completion_function (text
, subsequent_name
);
1421 if (return_val_used
>= return_val_alloced
)
1423 return_val_alloced
*= 2;
1425 (char **) xrealloc (return_val
,
1426 return_val_alloced
* sizeof (char *));
1430 return_val
[return_val_used
++] = p
;
1433 /* Like emacs, don't complete on old versions. Especially useful
1434 in the "source" command. */
1435 if (p
[strlen (p
) - 1] == '~')
1441 /* Return exactly p. */
1442 return_val
[return_val_used
++] = p
;
1443 else if (word
> text
)
1445 /* Return some portion of p. */
1446 q
= xmalloc (strlen (p
) + 5);
1447 strcpy (q
, p
+ (word
- text
));
1448 return_val
[return_val_used
++] = q
;
1453 /* Return some of TEXT plus p. */
1454 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1455 strncpy (q
, word
, text
- word
);
1456 q
[text
- word
] = '\0';
1458 return_val
[return_val_used
++] = q
;
1462 subsequent_name
= 1;
1465 /* There is no way to do this just long enough to affect quote inserting
1466 without also affecting the next completion. This should be fixed in
1468 /* Insure that readline does the right thing
1469 with respect to inserting quotes. */
1470 rl_completer_word_break_characters
= "";
1475 /* Here are some useful test cases for completion. FIXME: These should
1476 be put in the test suite. They should be tested with both M-? and TAB.
1478 "show output-" "radix"
1479 "show output" "-radix"
1480 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1481 "p " ambiguous (all symbols)
1482 "info t foo" no completions
1483 "info t " no completions
1484 "info t" ambiguous ("info target", "info terminal", etc.)
1485 "info ajksdlfk" no completions
1486 "info ajksdlfk " no completions
1488 "info " ambiguous (all info commands)
1489 "p \"a" no completions (string constant)
1490 "p 'a" ambiguous (all symbols starting with a)
1491 "p b-a" ambiguous (all symbols starting with a)
1492 "p b-" ambiguous (all symbols)
1493 "file Make" "file" (word break hard to screw up here)
1494 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1497 /* Generate completions one by one for the completer. Each time we are
1498 called return another potential completion to the caller.
1499 line_completion just completes on commands or passes the buck to the
1500 command's completer function, the stuff specific to symbol completion
1501 is in make_symbol_completion_list.
1503 TEXT is the caller's idea of the "word" we are looking at.
1505 MATCHES is the number of matches that have currently been collected from
1506 calling this completion function. When zero, then we need to initialize,
1507 otherwise the initialization has already taken place and we can just
1508 return the next potential completion string.
1510 LINE_BUFFER is available to be looked at; it contains the entire text
1511 of the line. POINT is the offset in that line of the cursor. You
1512 should pretend that the line ends at POINT.
1514 Returns NULL if there are no more completions, else a pointer to a string
1515 which is a possible completion, it is the caller's responsibility to
1519 line_completion_function (text
, matches
, line_buffer
, point
)
1525 static char **list
= (char **)NULL
; /* Cache of completions */
1526 static int index
; /* Next cached completion */
1527 char *output
= NULL
;
1528 char *tmp_command
, *p
;
1529 /* Pointer within tmp_command which corresponds to text. */
1531 struct cmd_list_element
*c
, *result_list
;
1535 /* The caller is beginning to accumulate a new set of completions, so
1536 we need to find all of them now, and cache them for returning one at
1537 a time on future calls. */
1541 /* Free the storage used by LIST, but not by the strings inside.
1542 This is because rl_complete_internal () frees the strings. */
1548 /* Choose the default set of word break characters to break completions.
1549 If we later find out that we are doing completions on command strings
1550 (as opposed to strings supplied by the individual command completer
1551 functions, which can be any string) then we will switch to the
1552 special word break set for command strings, which leaves out the
1553 '-' character used in some commands. */
1555 rl_completer_word_break_characters
=
1556 gdb_completer_word_break_characters
;
1558 /* Decide whether to complete on a list of gdb commands or on symbols. */
1559 tmp_command
= (char *) alloca (point
+ 1);
1562 strncpy (tmp_command
, line_buffer
, point
);
1563 tmp_command
[point
] = '\0';
1564 /* Since text always contains some number of characters leading up
1565 to point, we can find the equivalent position in tmp_command
1566 by subtracting that many characters from the end of tmp_command. */
1567 word
= tmp_command
+ point
- strlen (text
);
1571 /* An empty line we want to consider ambiguous; that is, it
1572 could be any command. */
1573 c
= (struct cmd_list_element
*) -1;
1578 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1581 /* Move p up to the next interesting thing. */
1582 while (*p
== ' ' || *p
== '\t')
1589 /* It is an unrecognized command. So there are no
1590 possible completions. */
1593 else if (c
== (struct cmd_list_element
*) -1)
1597 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1598 doesn't advance over that thing itself. Do so now. */
1600 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1602 if (q
!= tmp_command
+ point
)
1604 /* There is something beyond the ambiguous
1605 command, so there are no possible completions. For
1606 example, "info t " or "info t foo" does not complete
1607 to anything, because "info t" can be "info target" or
1613 /* We're trying to complete on the command which was ambiguous.
1614 This we can deal with. */
1617 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1622 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1624 /* Insure that readline does the right thing with respect to
1625 inserting quotes. */
1626 rl_completer_word_break_characters
=
1627 gdb_completer_command_word_break_characters
;
1632 /* We've recognized a full command. */
1634 if (p
== tmp_command
+ point
)
1636 /* There is no non-whitespace in the line beyond the command. */
1638 if (p
[-1] == ' ' || p
[-1] == '\t')
1640 /* The command is followed by whitespace; we need to complete
1641 on whatever comes after command. */
1644 /* It is a prefix command; what comes after it is
1645 a subcommand (e.g. "info "). */
1646 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1648 /* Insure that readline does the right thing
1649 with respect to inserting quotes. */
1650 rl_completer_word_break_characters
=
1651 gdb_completer_command_word_break_characters
;
1655 list
= complete_on_enum (c
->enums
, p
, word
);
1656 rl_completer_word_break_characters
=
1657 gdb_completer_command_word_break_characters
;
1661 /* It is a normal command; what comes after it is
1662 completed by the command's completer function. */
1663 list
= (*c
->completer
) (p
, word
);
1668 /* The command is not followed by whitespace; we need to
1669 complete on the command itself. e.g. "p" which is a
1670 command itself but also can complete to "print", "ptype"
1674 /* Find the command we are completing on. */
1676 while (q
> tmp_command
)
1678 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1684 list
= complete_on_cmdlist (result_list
, q
, word
);
1686 /* Insure that readline does the right thing
1687 with respect to inserting quotes. */
1688 rl_completer_word_break_characters
=
1689 gdb_completer_command_word_break_characters
;
1694 /* There is non-whitespace beyond the command. */
1696 if (c
->prefixlist
&& !c
->allow_unknown
)
1698 /* It is an unrecognized subcommand of a prefix command,
1699 e.g. "info adsfkdj". */
1704 list
= complete_on_enum (c
->enums
, p
, word
);
1708 /* It is a normal command. */
1709 list
= (*c
->completer
) (p
, word
);
1715 /* If we found a list of potential completions during initialization then
1716 dole them out one at a time. The vector of completions is NULL
1717 terminated, so after returning the last one, return NULL (and continue
1718 to do so) each time we are called after that, until a new list is
1723 output
= list
[index
];
1731 /* Can't do this because readline hasn't yet checked the word breaks
1732 for figuring out whether to insert a quote. */
1734 /* Make sure the word break characters are set back to normal for the
1735 next time that readline tries to complete something. */
1736 rl_completer_word_break_characters
=
1737 gdb_completer_word_break_characters
;
1743 /* Line completion interface function for readline. */
1746 readline_line_completion_function (text
, matches
)
1750 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1753 /* Skip over a possibly quoted word (as defined by the quote characters
1754 and word break characters the completer uses). Returns pointer to the
1755 location after the "word". */
1761 char quote_char
= '\0';
1764 for (scan
= str
; *scan
!= '\0'; scan
++)
1766 if (quote_char
!= '\0')
1768 /* Ignore everything until the matching close quote char */
1769 if (*scan
== quote_char
)
1771 /* Found matching close quote. */
1776 else if (strchr (gdb_completer_quote_characters
, *scan
))
1778 /* Found start of a quoted string. */
1781 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1795 #if STOP_SIGNAL == SIGTSTP
1796 signal (SIGTSTP
, SIG_DFL
);
1798 kill (getpid (), SIGTSTP
);
1799 signal (SIGTSTP
, stop_sig
);
1801 signal (STOP_SIGNAL
, stop_sig
);
1803 printf_unfiltered ("%s", prompt
);
1804 gdb_flush (gdb_stdout
);
1806 /* Forget about any previous command -- null line now will do nothing. */
1809 #endif /* STOP_SIGNAL */
1811 /* Initialize signal handlers. */
1821 signal (SIGINT
, request_quit
);
1823 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1824 passed to the inferior, which we don't want. It would be
1825 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1826 on BSD4.3 systems using vfork, that can affect the
1827 GDB process as well as the inferior (the signal handling tables
1828 might be in memory, shared between the two). Since we establish
1829 a handler for SIGQUIT, when we call exec it will set the signal
1830 to SIG_DFL for us. */
1831 signal (SIGQUIT
, do_nothing
);
1832 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1833 signal (SIGHUP
, disconnect
);
1834 signal (SIGFPE
, float_handler
);
1836 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1837 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1841 /* Read one line from the command input stream `instream'
1842 into the local static buffer `linebuffer' (whose current length
1844 The buffer is made bigger as necessary.
1845 Returns the address of the start of the line.
1847 NULL is returned for end of file.
1849 *If* the instream == stdin & stdin is a terminal, the line read
1850 is copied into the file line saver (global var char *line,
1851 length linesize) so that it can be duplicated.
1853 This routine either uses fancy command line editing or
1854 simple input as the user has requested. */
1857 command_line_input (prrompt
, repeat
, annotation_suffix
)
1860 char *annotation_suffix
;
1862 static char *linebuffer
= 0;
1863 static unsigned linelength
= 0;
1867 char *local_prompt
= prrompt
;
1872 /* The annotation suffix must be non-NULL. */
1873 if (annotation_suffix
== NULL
)
1874 annotation_suffix
= "";
1876 if (annotation_level
> 1 && instream
== stdin
)
1878 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1879 + strlen (annotation_suffix
) + 40);
1880 if (prrompt
== NULL
)
1881 local_prompt
[0] = '\0';
1883 strcpy (local_prompt
, prrompt
);
1884 strcat (local_prompt
, "\n\032\032");
1885 strcat (local_prompt
, annotation_suffix
);
1886 strcat (local_prompt
, "\n");
1889 if (linebuffer
== 0)
1892 linebuffer
= (char *) xmalloc (linelength
);
1897 /* Control-C quits instantly if typed while in this loop
1898 since it should not wait until the user types a newline. */
1902 signal (STOP_SIGNAL
, stop_sig
);
1907 /* Make sure that all output has been output. Some machines may let
1908 you get away with leaving out some of the gdb_flush, but not all. */
1910 gdb_flush (gdb_stdout
);
1911 gdb_flush (gdb_stderr
);
1913 if (source_file_name
!= NULL
)
1915 ++source_line_number
;
1916 sprintf (source_error
,
1917 "%s%s:%d: Error in sourced command file:\n",
1920 source_line_number
);
1921 error_pre_print
= source_error
;
1924 if (annotation_level
> 1 && instream
== stdin
)
1926 printf_unfiltered ("\n\032\032pre-");
1927 printf_unfiltered (annotation_suffix
);
1928 printf_unfiltered ("\n");
1931 /* Don't use fancy stuff if not talking to stdin. */
1932 if (command_editing_p
&& instream
== stdin
1933 && ISATTY (instream
))
1934 rl
= readline (local_prompt
);
1936 rl
= gdb_readline (local_prompt
);
1938 if (annotation_level
> 1 && instream
== stdin
)
1940 printf_unfiltered ("\n\032\032post-");
1941 printf_unfiltered (annotation_suffix
);
1942 printf_unfiltered ("\n");
1945 if (!rl
|| rl
== (char *) EOF
)
1950 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1952 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1953 nline
= (char *) xrealloc (linebuffer
, linelength
);
1954 p
+= nline
- linebuffer
;
1958 /* Copy line. Don't copy null at end. (Leaves line alone
1959 if this was just a newline) */
1963 free (rl
); /* Allocated in readline. */
1965 if (p
== linebuffer
|| *(p
- 1) != '\\')
1968 p
--; /* Put on top of '\'. */
1969 local_prompt
= (char *) 0;
1974 signal (STOP_SIGNAL
, SIG_DFL
);
1981 #define SERVER_COMMAND_LENGTH 7
1983 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1984 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1987 /* Note that we don't set `line'. Between this and the check in
1988 dont_repeat, this insures that repeating will still do the
1991 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1994 /* Do history expansion if that is wished. */
1995 if (history_expansion_p
&& instream
== stdin
1996 && ISATTY (instream
))
1998 char *history_value
;
2001 *p
= '\0'; /* Insert null now. */
2002 expanded
= history_expand (linebuffer
, &history_value
);
2005 /* Print the changes. */
2006 printf_unfiltered ("%s\n", history_value
);
2008 /* If there was an error, call this function again. */
2011 free (history_value
);
2012 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2014 if (strlen (history_value
) > linelength
)
2016 linelength
= strlen (history_value
) + 1;
2017 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2019 strcpy (linebuffer
, history_value
);
2020 p
= linebuffer
+ strlen(linebuffer
);
2021 free (history_value
);
2025 /* If we just got an empty line, and that is supposed
2026 to repeat the previous command, return the value in the
2030 if (p
== linebuffer
)
2033 while (*p1
== ' ' || *p1
== '\t')
2041 /* Add line to history if appropriate. */
2042 if (instream
== stdin
2043 && ISATTY (stdin
) && *linebuffer
)
2044 add_history (linebuffer
);
2046 /* Note: lines consisting solely of comments are added to the command
2047 history. This is useful when you type a command, and then
2048 realize you don't want to execute it quite yet. You can comment
2049 out the command and then later fetch it from the value history
2050 and remove the '#'. The kill ring is probably better, but some
2051 people are in the habit of commenting things out. */
2053 while ((c
= *p1
++) != '\0')
2056 while ((c
= *p1
++) != '"')
2058 /* Make sure an escaped '"' doesn't make us think the string
2066 while ((c
= *p1
++) != '\'')
2068 /* Make sure an escaped '\'' doesn't make us think the string
2077 /* Found a comment. */
2083 /* Save into global buffer if appropriate. */
2086 if (linelength
> linesize
)
2088 line
= xrealloc (line
, linelength
);
2089 linesize
= linelength
;
2091 strcpy (line
, linebuffer
);
2099 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2100 code bodies. This is typically used when we encounter an "else"
2101 clause for an "if" command. */
2104 realloc_body_list (command
, new_length
)
2105 struct command_line
*command
;
2109 struct command_line
**body_list
;
2111 n
= command
->body_count
;
2113 /* Nothing to do? */
2114 if (new_length
<= n
)
2117 body_list
= (struct command_line
**)
2118 xmalloc (sizeof (struct command_line
*) * new_length
);
2120 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2122 free (command
->body_list
);
2123 command
->body_list
= body_list
;
2124 command
->body_count
= new_length
;
2127 /* Read one line from the input stream. If the command is an "else" or
2128 "end", return such an indication to the caller. */
2130 static enum misc_command_type
2131 read_next_line (command
)
2132 struct command_line
**command
;
2134 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2137 if (control_level
>= 254)
2138 error ("Control nesting too deep!\n");
2140 /* Set a prompt based on the nesting of the control commands. */
2141 if (instream
== stdin
)
2143 for (i
= 0; i
< control_level
; i
++)
2144 control_prompt
[i
] = ' ';
2145 control_prompt
[i
] = '>';
2146 control_prompt
[i
+1] = '\0';
2147 prompt_ptr
= (char *)&control_prompt
[0];
2152 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2154 /* Not sure what to do here. */
2158 /* Strip leading and trailing whitespace. */
2159 while (*p
== ' ' || *p
== '\t')
2162 p1
= p
+ strlen (p
);
2163 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2166 /* Blanks and comments don't really do anything, but we need to
2167 distinguish them from else, end and other commands which can be
2169 if (p1
== p
|| p
[0] == '#')
2172 /* Is this the end of a simple, while, or if control structure? */
2173 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2176 /* Is the else clause of an if control structure? */
2177 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2178 return else_command
;
2180 /* Check for while, if, break, continue, etc and build a new command
2181 line structure for them. */
2182 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2183 *command
= build_command_line (while_control
, p
+ 6);
2184 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2185 *command
= build_command_line (if_control
, p
+ 3);
2186 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2188 *command
= (struct command_line
*)
2189 xmalloc (sizeof (struct command_line
));
2190 (*command
)->next
= NULL
;
2191 (*command
)->line
= NULL
;
2192 (*command
)->control_type
= break_control
;
2193 (*command
)->body_count
= 0;
2194 (*command
)->body_list
= NULL
;
2196 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2198 *command
= (struct command_line
*)
2199 xmalloc (sizeof (struct command_line
));
2200 (*command
)->next
= NULL
;
2201 (*command
)->line
= NULL
;
2202 (*command
)->control_type
= continue_control
;
2203 (*command
)->body_count
= 0;
2204 (*command
)->body_list
= NULL
;
2208 /* A normal command. */
2209 *command
= (struct command_line
*)
2210 xmalloc (sizeof (struct command_line
));
2211 (*command
)->next
= NULL
;
2212 (*command
)->line
= savestring (p
, p1
- p
);
2213 (*command
)->control_type
= simple_control
;
2214 (*command
)->body_count
= 0;
2215 (*command
)->body_list
= NULL
;
2218 /* Nothing special. */
2222 /* Recursively read in the control structures and create a command_line
2225 The parent_control parameter is the control structure in which the
2226 following commands are nested. */
2228 static enum command_control_type
2229 recurse_read_control_structure (current_cmd
)
2230 struct command_line
*current_cmd
;
2232 int current_body
, i
;
2233 enum misc_command_type val
;
2234 enum command_control_type ret
;
2235 struct command_line
**body_ptr
, *child_tail
, *next
;
2236 struct cleanup
*old_chains
, *tmp_chains
;
2242 /* Sanity checks. */
2243 if (current_cmd
->control_type
== simple_control
)
2245 error ("Recursed on a simple control type\n");
2246 return invalid_control
;
2249 if (current_body
> current_cmd
->body_count
)
2251 error ("Allocated body is smaller than this command type needs\n");
2252 return invalid_control
;
2255 /* Read lines from the input stream and build control structures. */
2261 val
= read_next_line (&next
);
2263 /* Just skip blanks and comments. */
2264 if (val
== nop_command
)
2267 if (val
== end_command
)
2269 if (current_cmd
->control_type
== while_control
2270 || current_cmd
->control_type
== if_control
)
2272 /* Success reading an entire control structure. */
2273 ret
= simple_control
;
2278 ret
= invalid_control
;
2283 /* Not the end of a control structure. */
2284 if (val
== else_command
)
2286 if (current_cmd
->control_type
== if_control
2287 && current_body
== 1)
2289 realloc_body_list (current_cmd
, 2);
2296 ret
= invalid_control
;
2303 child_tail
->next
= next
;
2307 /* We have just read the first line of the child's control
2308 structure. From now on, arrange to throw away the line
2309 we have if we quit or get an error. */
2310 body_ptr
= current_cmd
->body_list
;
2311 for (i
= 1; i
< current_body
; i
++)
2316 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2319 old_chains
= tmp_chains
;
2324 /* If the latest line is another control structure, then recurse
2326 if (next
->control_type
== while_control
2327 || next
->control_type
== if_control
)
2330 ret
= recurse_read_control_structure (next
);
2333 if (ret
!= simple_control
)
2339 if (ret
== invalid_control
&& old_chains
)
2340 do_cleanups (old_chains
);
2341 else if (old_chains
)
2342 discard_cleanups (old_chains
);
2348 /* Read lines from the input stream
2349 and accumulate them in a chain of struct command_line's
2350 which is then returned. */
2352 struct command_line
*
2353 read_command_lines ()
2355 struct command_line
*head
, *tail
, *next
;
2356 struct cleanup
*old_chain
;
2357 enum command_control_type ret
;
2358 enum misc_command_type val
;
2365 val
= read_next_line (&next
);
2367 /* Ignore blank lines or comments. */
2368 if (val
== nop_command
)
2371 if (val
== end_command
)
2373 ret
= simple_control
;
2377 if (val
!= ok_command
)
2379 ret
= invalid_control
;
2383 if (next
->control_type
== while_control
2384 || next
->control_type
== if_control
)
2387 ret
= recurse_read_control_structure (next
);
2390 if (ret
== invalid_control
)
2401 old_chain
= make_cleanup (free_command_lines
, &head
);
2410 if (ret
!= invalid_control
)
2412 discard_cleanups (old_chain
);
2416 do_cleanups (old_chain
);
2422 /* Free a chain of struct command_line's. */
2425 free_command_lines (lptr
)
2426 struct command_line
**lptr
;
2428 register struct command_line
*l
= *lptr
;
2429 register struct command_line
*next
;
2430 struct command_line
**blist
;
2435 if (l
->body_count
> 0)
2437 blist
= l
->body_list
;
2438 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2439 free_command_lines (blist
);
2448 /* Add an element to the list of info subcommands. */
2451 add_info (name
, fun
, doc
)
2453 void (*fun
) PARAMS ((char *, int));
2456 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2459 /* Add an alias to the list of info subcommands. */
2462 add_info_alias (name
, oldname
, abbrev_flag
)
2467 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2470 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2471 Therefore, its own definition is called only for "info" with no args. */
2475 info_command (arg
, from_tty
)
2479 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2480 help_list (infolist
, "info ", -1, gdb_stdout
);
2483 /* The "complete" command is used by Emacs to implement completion. */
2487 complete_command (arg
, from_tty
)
2499 argpoint
= strlen (arg
);
2501 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2503 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2505 printf_unfiltered ("%s\n", completion
);
2510 /* The "show" command with no arguments shows all the settings. */
2514 show_command (arg
, from_tty
)
2518 cmd_show_list (showlist
, from_tty
, "");
2521 /* Add an element to the list of commands. */
2524 add_com (name
, class, fun
, doc
)
2526 enum command_class
class;
2527 void (*fun
) PARAMS ((char *, int));
2530 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2533 /* Add an alias or abbreviation command to the list of commands. */
2536 add_com_alias (name
, oldname
, class, abbrev_flag
)
2539 enum command_class
class;
2542 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2549 error ("Argument required (%s).", why
);
2554 help_command (command
, from_tty
)
2556 int from_tty
; /* Ignored */
2558 help_cmd (command
, gdb_stdout
);
2562 validate_comname (comname
)
2568 error_no_arg ("name of command to define");
2573 if (!isalnum(*p
) && *p
!= '-')
2574 error ("Junk in argument list: \"%s\"", p
);
2579 /* This is just a placeholder in the command data structures. */
2581 user_defined_command (ignore
, from_tty
)
2588 define_command (comname
, from_tty
)
2592 register struct command_line
*cmds
;
2593 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2594 char *tem
= comname
;
2595 #define HOOK_STRING "hook-"
2598 validate_comname (comname
);
2600 /* Look it up, and verify that we got an exact match. */
2601 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2602 if (c
&& !STREQ (comname
, c
->name
))
2607 if (c
->class == class_user
|| c
->class == class_alias
)
2608 tem
= "Redefine command \"%s\"? ";
2610 tem
= "Really redefine built-in command \"%s\"? ";
2611 if (!query (tem
, c
->name
))
2612 error ("Command \"%s\" not redefined.", c
->name
);
2615 /* If this new command is a hook, then mark the command which it
2616 is hooking. Note that we allow hooking `help' commands, so that
2617 we can hook the `stop' pseudo-command. */
2619 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2621 /* Look up cmd it hooks, and verify that we got an exact match. */
2622 tem
= comname
+HOOK_LEN
;
2623 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2624 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2628 warning ("Your new `%s' command does not hook any existing command.",
2630 if (!query ("Proceed? ", (char *)0))
2631 error ("Not confirmed.");
2635 comname
= savestring (comname
, strlen (comname
));
2637 /* If the rest of the commands will be case insensitive, this one
2638 should behave in the same manner. */
2639 for (tem
= comname
; *tem
; tem
++)
2640 if (isupper(*tem
)) *tem
= tolower(*tem
);
2644 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2645 End with a line saying just \"end\".\n", comname
);
2646 gdb_flush (gdb_stdout
);
2650 cmds
= read_command_lines ();
2652 if (c
&& c
->class == class_user
)
2653 free_command_lines (&c
->user_commands
);
2655 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2656 (c
&& c
->class == class_user
)
2657 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2658 newc
->user_commands
= cmds
;
2660 /* If this new command is a hook, then mark both commands as being
2664 hookc
->hook
= newc
; /* Target gets hooked. */
2665 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2670 document_command (comname
, from_tty
)
2674 struct command_line
*doclines
;
2675 register struct cmd_list_element
*c
;
2676 char *tem
= comname
;
2678 validate_comname (comname
);
2680 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2682 if (c
->class != class_user
)
2683 error ("Command \"%s\" is built-in.", comname
);
2686 printf_unfiltered ("Type documentation for \"%s\".\n\
2687 End with a line saying just \"end\".\n", comname
);
2689 doclines
= read_command_lines ();
2691 if (c
->doc
) free (c
->doc
);
2694 register struct command_line
*cl1
;
2695 register int len
= 0;
2697 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2698 len
+= strlen (cl1
->line
) + 1;
2700 c
->doc
= (char *) xmalloc (len
+ 1);
2703 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2705 strcat (c
->doc
, cl1
->line
);
2707 strcat (c
->doc
, "\n");
2711 free_command_lines (&doclines
);
2715 print_gnu_advertisement ()
2717 printf_unfiltered ("\
2718 GDB is free software and you are welcome to distribute copies of it\n\
2719 under certain conditions; type \"show copying\" to see the conditions.\n\
2720 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2725 print_gdb_version (stream
)
2728 fprintf_filtered (stream
, "\
2729 GDB %s (%s", version
, host_name
);
2731 if (!STREQ (host_name
, target_name
))
2732 fprintf_filtered (stream
, " --target %s", target_name
);
2734 fprintf_filtered (stream
, "), ");
2736 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2741 show_version (args
, from_tty
)
2746 print_gnu_advertisement ();
2747 print_gdb_version (gdb_stdout
);
2748 printf_filtered ("\n");
2752 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2758 printf_unfiltered ("%s", prompt
);
2759 gdb_flush (gdb_stdout
);
2763 quit_command (args
, from_tty
)
2767 if (inferior_pid
!= 0 && target_has_execution
)
2771 if (query ("The program is running. Quit anyway (and detach it)? "))
2772 target_detach (args
, from_tty
);
2774 error ("Not confirmed.");
2778 if (query ("The program is running. Quit anyway (and kill it)? "))
2781 error ("Not confirmed.");
2784 /* UDI wants this, to kill the TIP. */
2787 /* Save the history information if it is appropriate to do so. */
2788 if (write_history_p
&& history_filename
)
2789 write_history (history_filename
);
2794 /* Returns whether GDB is running on a terminal and whether the user
2795 desires that questions be asked of them on that terminal. */
2798 input_from_terminal_p ()
2800 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2805 pwd_command (args
, from_tty
)
2809 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2810 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2812 if (!STREQ (gdb_dirbuf
, current_directory
))
2813 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2814 current_directory
, gdb_dirbuf
);
2816 printf_unfiltered ("Working directory %s.\n", current_directory
);
2820 cd_command (dir
, from_tty
)
2825 /* Found something other than leading repetitions of "/..". */
2826 int found_real_path
;
2829 /* If the new directory is absolute, repeat is a no-op; if relative,
2830 repeat might be useful but is more likely to be a mistake. */
2834 error_no_arg ("new working directory");
2836 dir
= tilde_expand (dir
);
2837 make_cleanup (free
, dir
);
2839 if (chdir (dir
) < 0)
2840 perror_with_name (dir
);
2843 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2845 current_directory
= dir
;
2848 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2849 current_directory
= concat (current_directory
, dir
, NULL
);
2851 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2855 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2857 found_real_path
= 0;
2858 for (p
= current_directory
; *p
;)
2860 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2862 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2863 && (p
[3] == 0 || p
[3] == '/'))
2865 if (found_real_path
)
2867 /* Search backwards for the directory just before the "/.."
2868 and obliterate it and the "/..". */
2870 while (q
!= current_directory
&& q
[-1] != '/')
2873 if (q
== current_directory
)
2874 /* current_directory is
2875 a relative pathname ("can't happen"--leave it alone). */
2879 strcpy (q
- 1, p
+ 3);
2884 /* We are dealing with leading repetitions of "/..", for example
2885 "/../..", which is the Mach super-root. */
2890 found_real_path
= 1;
2895 forget_cached_source_info ();
2898 pwd_command ((char *) 0, 1);
2901 struct source_cleanup_lines_args
{
2904 char *old_pre_error
;
2905 char *old_error_pre_print
;
2909 source_cleanup_lines (args
)
2912 struct source_cleanup_lines_args
*p
=
2913 (struct source_cleanup_lines_args
*)args
;
2914 source_line_number
= p
->old_line
;
2915 source_file_name
= p
->old_file
;
2916 source_pre_error
= p
->old_pre_error
;
2917 error_pre_print
= p
->old_error_pre_print
;
2922 source_command (args
, from_tty
)
2927 struct cleanup
*old_cleanups
;
2929 struct source_cleanup_lines_args old_lines
;
2934 error ("source command requires pathname of file to source.");
2937 file
= tilde_expand (file
);
2938 old_cleanups
= make_cleanup (free
, file
);
2940 stream
= fopen (file
, FOPEN_RT
);
2942 perror_with_name (file
);
2944 make_cleanup (fclose
, stream
);
2946 old_lines
.old_line
= source_line_number
;
2947 old_lines
.old_file
= source_file_name
;
2948 old_lines
.old_pre_error
= source_pre_error
;
2949 old_lines
.old_error_pre_print
= error_pre_print
;
2950 make_cleanup (source_cleanup_lines
, &old_lines
);
2951 source_line_number
= 0;
2952 source_file_name
= file
;
2953 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2954 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2955 make_cleanup (free
, source_pre_error
);
2956 /* This will get set every time we read a line. So it won't stay "" for
2958 error_pre_print
= "";
2960 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2961 if (source_error_allocated
< needed_length
)
2963 source_error_allocated
*= 2;
2964 if (source_error_allocated
< needed_length
)
2965 source_error_allocated
= needed_length
;
2966 if (source_error
== NULL
)
2967 source_error
= xmalloc (source_error_allocated
);
2969 source_error
= xrealloc (source_error
, source_error_allocated
);
2972 read_command_file (stream
);
2974 do_cleanups (old_cleanups
);
2979 echo_command (text
, from_tty
)
2987 while ((c
= *p
++) != '\0')
2991 /* \ at end of argument is used after spaces
2992 so they won't be lost. */
2996 c
= parse_escape (&p
);
2998 printf_filtered ("%c", c
);
3001 printf_filtered ("%c", c
);
3004 /* Force this output to appear now. */
3006 gdb_flush (gdb_stdout
);
3010 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3012 /* Functions to manipulate the endianness of the target. */
3014 #ifndef TARGET_BYTE_ORDER_DEFAULT
3015 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3018 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3020 static int target_byte_order_auto
= 1;
3022 /* Called if the user enters ``set endian'' without an argument. */
3024 set_endian (args
, from_tty
)
3028 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3029 show_endian (args
, from_tty
);
3032 /* Called by ``set endian big''. */
3034 set_endian_big (args
, from_tty
)
3038 target_byte_order
= BIG_ENDIAN
;
3039 target_byte_order_auto
= 0;
3042 /* Called by ``set endian little''. */
3044 set_endian_little (args
, from_tty
)
3048 target_byte_order
= LITTLE_ENDIAN
;
3049 target_byte_order_auto
= 0;
3052 /* Called by ``set endian auto''. */
3054 set_endian_auto (args
, from_tty
)
3058 target_byte_order_auto
= 1;
3061 /* Called by ``show endian''. */
3063 show_endian (args
, from_tty
)
3068 (target_byte_order_auto
3069 ? "The target endianness is set automatically (currently %s endian)\n"
3070 : "The target is assumed to be %s endian\n");
3071 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3074 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3076 /* Set the endianness from a BFD. */
3078 set_endian_from_file (abfd
)
3081 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3084 if (abfd
->xvec
->byteorder_big_p
)
3087 want
= LITTLE_ENDIAN
;
3088 if (target_byte_order_auto
)
3089 target_byte_order
= want
;
3090 else if (target_byte_order
!= want
)
3091 warning ("%s endian file does not match %s endian target.",
3092 want
== BIG_ENDIAN
? "big" : "little",
3093 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3095 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3097 if (abfd
->xvec
->byteorder_big_p
3098 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3099 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3100 warning ("%s endian file does not match %s endian target.",
3101 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3102 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3104 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3107 /* Functions to manipulate command line editing control variables. */
3109 /* Number of commands to print in each call to show_commands. */
3110 #define Hist_print 10
3112 show_commands (args
, from_tty
)
3116 /* Index for history commands. Relative to history_base. */
3119 /* Number of the history entry which we are planning to display next.
3120 Relative to history_base. */
3123 /* The first command in the history which doesn't exist (i.e. one more
3124 than the number of the last command). Relative to history_base. */
3127 extern HIST_ENTRY
*history_get
PARAMS ((int));
3129 /* Print out some of the commands from the command history. */
3130 /* First determine the length of the history list. */
3131 hist_len
= history_size
;
3132 for (offset
= 0; offset
< history_size
; offset
++)
3134 if (!history_get (history_base
+ offset
))
3143 if (args
[0] == '+' && args
[1] == '\0')
3144 /* "info editing +" should print from the stored position. */
3147 /* "info editing <exp>" should print around command number <exp>. */
3148 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3150 /* "show commands" means print the last Hist_print commands. */
3153 num
= hist_len
- Hist_print
;
3159 /* If there are at least Hist_print commands, we want to display the last
3160 Hist_print rather than, say, the last 6. */
3161 if (hist_len
- num
< Hist_print
)
3163 num
= hist_len
- Hist_print
;
3168 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3170 printf_filtered ("%5d %s\n", history_base
+ offset
,
3171 (history_get (history_base
+ offset
))->line
);
3174 /* The next command we want to display is the next one that we haven't
3178 /* If the user repeats this command with return, it should do what
3179 "show commands +" does. This is unnecessary if arg is null,
3180 because "show commands +" is not useful after "show commands". */
3181 if (from_tty
&& args
)
3188 /* Called by do_setshow_command. */
3191 set_history_size_command (args
, from_tty
, c
)
3194 struct cmd_list_element
*c
;
3196 if (history_size
== INT_MAX
)
3197 unstifle_history ();
3198 else if (history_size
>= 0)
3199 stifle_history (history_size
);
3202 history_size
= INT_MAX
;
3203 error ("History size must be non-negative");
3209 set_history (args
, from_tty
)
3213 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3214 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3219 show_history (args
, from_tty
)
3223 cmd_show_list (showhistlist
, from_tty
, "");
3226 int info_verbose
= 0; /* Default verbose msgs off */
3228 /* Called by do_setshow_command. An elaborate joke. */
3231 set_verbose (args
, from_tty
, c
)
3234 struct cmd_list_element
*c
;
3236 char *cmdname
= "verbose";
3237 struct cmd_list_element
*showcmd
;
3239 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3243 c
->doc
= "Set verbose printing of informational messages.";
3244 showcmd
->doc
= "Show verbose printing of informational messages.";
3248 c
->doc
= "Set verbosity.";
3249 showcmd
->doc
= "Show verbosity.";
3254 float_handler (signo
)
3257 /* This message is based on ANSI C, section 4.7. Note that integer
3258 divide by zero causes this, so "float" is a misnomer. */
3259 signal (SIGFPE
, float_handler
);
3260 error ("Erroneous arithmetic operation.");
3272 enablebreaklist
= NULL
;
3276 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3280 showhistlist
= NULL
;
3281 unsethistlist
= NULL
;
3282 #if MAINTENANCE_CMDS
3283 maintenancelist
= NULL
;
3284 maintenanceinfolist
= NULL
;
3285 maintenanceprintlist
= NULL
;
3287 setprintlist
= NULL
;
3288 showprintlist
= NULL
;
3289 setchecklist
= NULL
;
3290 showchecklist
= NULL
;
3293 /* Init the history buffer. Note that we are called after the init file(s)
3294 * have been read so that the user can change the history file via his
3295 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3296 * overrides all of this.
3304 tmpenv
= getenv ("HISTSIZE");
3306 history_size
= atoi (tmpenv
);
3307 else if (!history_size
)
3310 stifle_history (history_size
);
3312 tmpenv
= getenv ("GDBHISTFILE");
3314 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3315 else if (!history_filename
) {
3316 /* We include the current directory so that if the user changes
3317 directories the file written will be the same as the one
3319 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3321 read_history (history_filename
);
3327 struct cmd_list_element
*c
;
3329 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3331 add_prefix_cmd ("endian", class_support
, set_endian
,
3332 "Set endianness of target.",
3333 &endianlist
, "set endian ", 0, &setlist
);
3334 add_cmd ("big", class_support
, set_endian_big
,
3335 "Set target as being big endian.", &endianlist
);
3336 add_cmd ("little", class_support
, set_endian_little
,
3337 "Set target as being little endian.", &endianlist
);
3338 add_cmd ("auto", class_support
, set_endian_auto
,
3339 "Select target endianness automatically.", &endianlist
);
3340 add_cmd ("endian", class_support
, show_endian
,
3341 "Show endianness of target.", &showlist
);
3343 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3345 #ifdef DEFAULT_PROMPT
3346 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3348 prompt
= savestring ("(gdb) ", 6);
3351 /* Set the important stuff up for command editing. */
3352 command_editing_p
= 1;
3353 history_expansion_p
= 0;
3354 write_history_p
= 0;
3356 /* Setup important stuff for command line editing. */
3357 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3358 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3359 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3360 rl_readline_name
= "gdb";
3362 /* Define the classes of commands.
3363 They will appear in the help list in the reverse of this order. */
3365 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3366 "Maintenance commands.\n\
3367 Some gdb commands are provided just for use by gdb maintainers.\n\
3368 These commands are subject to frequent change, and may not be as\n\
3369 well documented as user commands.",
3371 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3372 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3373 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3374 The commands in this class are those defined by the user.\n\
3375 Use the \"define\" command to define a command.", &cmdlist
);
3376 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3377 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3378 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3379 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3380 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3381 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3382 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3383 counting from zero for the innermost (currently executing) frame.\n\n\
3384 At any time gdb identifies one frame as the \"selected\" frame.\n\
3385 Variable lookups are done with respect to the selected frame.\n\
3386 When the program being debugged stops, gdb selects the innermost frame.\n\
3387 The commands below can be used to select other frames by number or address.",
3389 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3391 add_com ("pwd", class_files
, pwd_command
,
3392 "Print working directory. This is used for your program as well.");
3393 c
= add_cmd ("cd", class_files
, cd_command
,
3394 "Set working directory to DIR for debugger and program being debugged.\n\
3395 The change does not take effect for the program being debugged\n\
3396 until the next time it is started.", &cmdlist
);
3397 c
->completer
= filename_completer
;
3400 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3405 add_com ("echo", class_support
, echo_command
,
3406 "Print a constant string. Give string as argument.\n\
3407 C escape sequences may be used in the argument.\n\
3408 No newline is added at the end of the argument;\n\
3409 use \"\\n\" if you want a newline to be printed.\n\
3410 Since leading and trailing whitespace are ignored in command arguments,\n\
3411 if you want to print some you must use \"\\\" before leading whitespace\n\
3412 to be printed or after trailing whitespace.");
3413 add_com ("document", class_support
, document_command
,
3414 "Document a user-defined command.\n\
3415 Give command name as argument. Give documentation on following lines.\n\
3416 End with a line of just \"end\".");
3417 add_com ("define", class_support
, define_command
,
3418 "Define a new command name. Command name is argument.\n\
3419 Definition appears on following lines, one command per line.\n\
3420 End with a line of just \"end\".\n\
3421 Use the \"document\" command to give documentation for the new command.\n\
3422 Commands defined in this way may have up to ten arguments.");
3425 c
= add_cmd ("source", class_support
, source_command
,
3426 "Read commands from a file named FILE.\n\
3427 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3428 when gdb is started.", &cmdlist
);
3430 /* Punt file name, we can't help it easily. */
3431 c
= add_cmd ("source", class_support
, source_command
,
3432 "Read commands from a file named FILE.\n\
3433 Note that the file \".gdbinit\" is read automatically in this way\n\
3434 when gdb is started.", &cmdlist
);
3436 c
->completer
= filename_completer
;
3438 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3439 add_com ("help", class_support
, help_command
, "Print list of commands.");
3440 add_com_alias ("q", "quit", class_support
, 1);
3441 add_com_alias ("h", "help", class_support
, 1);
3444 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3447 add_show_from_set (c
, &showlist
);
3448 c
->function
.sfunc
= set_verbose
;
3449 set_verbose (NULL
, 0, c
);
3452 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3453 "Set editing of command lines as they are typed.\n\
3454 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3455 Without an argument, command line editing is enabled. To edit, use\n\
3456 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3459 add_prefix_cmd ("history", class_support
, set_history
,
3460 "Generic command for setting command history parameters.",
3461 &sethistlist
, "set history ", 0, &setlist
);
3462 add_prefix_cmd ("history", class_support
, show_history
,
3463 "Generic command for showing command history parameters.",
3464 &showhistlist
, "show history ", 0, &showlist
);
3467 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3468 "Set history expansion on command input.\n\
3469 Without an argument, history expansion is enabled.", &sethistlist
),
3473 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3474 "Set saving of the history record on exit.\n\
3475 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3476 Without an argument, saving is enabled.", &sethistlist
),
3479 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3480 "Set the size of the command history, \n\
3481 ie. the number of previous commands to keep a record of.", &sethistlist
);
3482 add_show_from_set (c
, &showhistlist
);
3483 c
->function
.sfunc
= set_history_size_command
;
3486 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3487 "Set the filename in which to record the command history\n\
3488 (the list of previous commands of which a record is kept).", &sethistlist
),
3492 (add_set_cmd ("confirm", class_support
, var_boolean
,
3494 "Set whether to confirm potentially dangerous operations.",
3498 add_prefix_cmd ("info", class_info
, info_command
,
3499 "Generic command for showing things about the program being debugged.",
3500 &infolist
, "info ", 0, &cmdlist
);
3501 add_com_alias ("i", "info", class_info
, 1);
3503 add_com ("complete", class_obscure
, complete_command
,
3504 "List the completions for the rest of the line as a command.");
3506 add_prefix_cmd ("show", class_info
, show_command
,
3507 "Generic command for showing things about the debugger.",
3508 &showlist
, "show ", 0, &cmdlist
);
3509 /* Another way to get at the same thing. */
3510 add_info ("set", show_command
, "Show all GDB settings.");
3512 add_cmd ("commands", no_class
, show_commands
,
3513 "Show the the history of commands you typed.\n\
3514 You can supply a command number to start with, or a `+' to start after\n\
3515 the previous command number shown.",
3518 add_cmd ("version", no_class
, show_version
,
3519 "Show what version of GDB this is.", &showlist
);
3521 add_com ("while", class_support
, while_command
,
3522 "Execute nested commands WHILE the conditional expression is non zero.\n\
3523 The conditional expression must follow the word `while' and must in turn be\
3524 followed by a new line. The nested commands must be entered one per line,\
3525 and should be terminated by the word `end'.");
3527 add_com ("if", class_support
, if_command
,
3528 "Execute nested commands once IF the conditional expression is non zero.\n\
3529 The conditional expression must follow the word `if' and must in turn be\
3530 followed by a new line. The nested commands must be entered one per line,\
3531 and should be terminated by the word 'else' or `end'. If an else clause\
3532 is used, the same rules apply to its nested commands as to the first ones.");
3534 /* If target is open when baud changes, it doesn't take effect until the
3535 next open (I think, not sure). */
3536 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3537 var_zinteger
, (char *)&baud_rate
,
3538 "Set baud rate for remote serial I/O.\n\
3539 This value is used to set the speed of the serial port when debugging\n\
3540 using remote targets.", &setlist
),
3544 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3545 "Set debugging of remote protocol.\n\
3546 When enabled, each packet sent or received with the remote target\n\
3547 is displayed.", &setlist
),