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 /* Where to go for return_to_top_level (RETURN_ERROR). */
422 jmp_buf error_return
;
423 /* Where to go for return_to_top_level (RETURN_QUIT). */
426 /* Return for reason REASON. This generally gets back to the command
427 loop, but can be caught via catch_errors. */
430 return_to_top_level (reason
)
431 enum return_reason reason
;
436 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
437 I can think of a reason why that is vital, though). */
438 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
440 disable_current_display ();
441 do_cleanups (ALL_CLEANUPS
);
443 if (annotation_level
> 1)
454 (NORETURN
void) longjmp
455 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
458 /* Call FUNC with arg ARGS, catching any errors. If there is no
459 error, return the value returned by FUNC. If there is an error,
460 print ERRSTRING, print the specific error message, then return
463 Must not be called with immediate_quit in effect (bad things might
464 happen, say we got a signal in the middle of a memcpy to quit_return).
465 This is an OK restriction; with very few exceptions immediate_quit can
466 be replaced by judicious use of QUIT.
468 MASK specifies what to catch; it is normally set to
469 RETURN_MASK_ALL, if for no other reason than that the code which
470 calls catch_errors might not be set up to deal with a quit which
471 isn't caught. But if the code can deal with it, it generally
472 should be RETURN_MASK_ERROR, unless for some reason it is more
473 useful to abort only the portion of the operation inside the
474 catch_errors. Note that quit should return to the command line
475 fairly quickly, even if some further processing is being done. */
478 catch_errors (func
, args
, errstring
, mask
)
479 int (*func
) PARAMS ((char *));
488 struct cleanup
*saved_cleanup_chain
;
489 char *saved_error_pre_print
;
490 char *saved_quit_pre_print
;
492 saved_cleanup_chain
= save_cleanups ();
493 saved_error_pre_print
= error_pre_print
;
494 saved_quit_pre_print
= quit_pre_print
;
496 if (mask
& RETURN_MASK_ERROR
)
498 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
499 error_pre_print
= errstring
;
501 if (mask
& RETURN_MASK_QUIT
)
503 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
504 quit_pre_print
= errstring
;
507 if (setjmp (tmp_jmp
) == 0)
509 if (mask
& RETURN_MASK_ERROR
)
510 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
511 if (mask
& RETURN_MASK_QUIT
)
512 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
513 val
= (*func
) (args
);
518 restore_cleanups (saved_cleanup_chain
);
520 if (mask
& RETURN_MASK_ERROR
)
522 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
523 error_pre_print
= saved_error_pre_print
;
525 if (mask
& RETURN_MASK_QUIT
)
527 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
528 quit_pre_print
= saved_quit_pre_print
;
533 /* Handler for SIGHUP. */
539 catch_errors (quit_cover
, NULL
,
540 "Could not kill the program being debugged", RETURN_MASK_ALL
);
541 signal (SIGHUP
, SIG_DFL
);
542 kill (getpid (), SIGHUP
);
545 /* Just a little helper function for disconnect(). */
551 caution
= 0; /* Throw caution to the wind -- we're exiting.
552 This prevents asking the user dumb questions. */
553 quit_command((char *)0, 0);
557 /* Line number we are currently in in a file which is being sourced. */
558 static int source_line_number
;
560 /* Name of the file we are sourcing. */
561 static char *source_file_name
;
563 /* Buffer containing the error_pre_print used by the source stuff.
565 static char *source_error
;
566 static int source_error_allocated
;
568 /* Something to glom on to the start of error_pre_print if source_file_name
570 static char *source_pre_error
;
572 /* Clean up on error during a "source" command (or execution of a
573 user-defined command). */
576 source_cleanup (stream
)
579 /* Restore the previous input stream. */
583 /* Read commands from STREAM. */
585 read_command_file (stream
)
588 struct cleanup
*cleanups
;
590 cleanups
= make_cleanup (source_cleanup
, instream
);
593 do_cleanups (cleanups
);
596 extern void init_proc ();
598 void (*pre_init_ui_hook
) PARAMS ((void));
603 if (pre_init_ui_hook
)
606 /* Run the init function of each source file */
608 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
609 current_directory
= gdb_dirbuf
;
611 init_cmd_lists (); /* This needs to be done first */
612 initialize_targets (); /* Setup target_terminal macros for utils.c */
613 initialize_utils (); /* Make errors and warnings possible */
614 initialize_all_files ();
615 init_main (); /* But that omits this file! Do it now */
620 /* We need a default language for parsing expressions, so simple things like
621 "set width 0" won't fail if no language is explicitly set in a config file
622 or implicitly set by reading an executable during startup. */
623 set_language (language_c
);
624 expected_language
= current_language
; /* don't warn about the change. */
630 /* Allocate, initialize a new command line structure for one of the
631 control commands (if/while). */
633 static struct command_line
*
634 build_command_line (type
, args
)
635 enum command_control_type type
;
638 struct command_line
*cmd
;
640 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
642 cmd
->control_type
= type
;
646 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
648 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
649 cmd
->line
= savestring (args
, strlen (args
));
653 /* Build and return a new command structure for the control commands
654 such as "if" and "while". */
656 static struct command_line
*
657 get_command_line (type
, arg
)
658 enum command_control_type type
;
661 struct command_line
*cmd
;
662 struct cleanup
*old_chain
= NULL
;
664 /* Allocate and build a new command line structure. */
665 cmd
= build_command_line (type
, arg
);
667 old_chain
= make_cleanup (free_command_lines
, &cmd
);
669 /* Read in the body of this command. */
670 if (recurse_read_control_structure (cmd
) == invalid_control
)
672 warning ("error reading in control structure\n");
673 do_cleanups (old_chain
);
677 discard_cleanups (old_chain
);
681 /* Recursively print a command (including full control structures). */
683 print_command_line (cmd
, depth
)
684 struct command_line
*cmd
;
691 for (i
= 0; i
< depth
; i
++)
692 fputs_filtered (" ", gdb_stdout
);
695 /* A simple command, print it and return. */
696 if (cmd
->control_type
== simple_control
)
698 fputs_filtered (cmd
->line
, gdb_stdout
);
699 fputs_filtered ("\n", gdb_stdout
);
703 /* loop_continue to jump to the start of a while loop, print it
705 if (cmd
->control_type
== continue_control
)
707 fputs_filtered ("loop_continue\n", gdb_stdout
);
711 /* loop_break to break out of a while loop, print it and return. */
712 if (cmd
->control_type
== break_control
)
714 fputs_filtered ("loop_break\n", gdb_stdout
);
718 /* A while command. Recursively print its subcommands before returning. */
719 if (cmd
->control_type
== while_control
)
721 struct command_line
*list
;
722 fputs_filtered ("while ", gdb_stdout
);
723 fputs_filtered (cmd
->line
, gdb_stdout
);
724 fputs_filtered ("\n", gdb_stdout
);
725 list
= *cmd
->body_list
;
728 print_command_line (list
, depth
+ 1);
733 /* An if command. Recursively print both arms before returning. */
734 if (cmd
->control_type
== if_control
)
736 fputs_filtered ("if ", gdb_stdout
);
737 fputs_filtered (cmd
->line
, gdb_stdout
);
738 fputs_filtered ("\n", gdb_stdout
);
740 print_command_line (cmd
->body_list
[0], depth
+ 1);
742 /* Show the false arm if it exists. */
743 if (cmd
->body_count
== 2)
747 for (i
= 0; i
< depth
; i
++)
748 fputs_filtered (" ", gdb_stdout
);
750 fputs_filtered ("else\n", gdb_stdout
);
751 print_command_line (cmd
->body_list
[1], depth
+ 1);
755 for (i
= 0; i
< depth
; i
++)
756 fputs_filtered (" ", gdb_stdout
);
758 fputs_filtered ("end\n", gdb_stdout
);
762 /* Execute the command in CMD. */
764 enum command_control_type
765 execute_control_command (cmd
)
766 struct command_line
*cmd
;
768 struct expression
*expr
;
769 struct command_line
*current
;
770 struct cleanup
*old_chain
= 0;
773 enum command_control_type ret
;
776 switch (cmd
->control_type
)
779 /* A simple command, execute it and return. */
780 new_line
= insert_args (cmd
->line
);
782 return invalid_control
;
783 old_chain
= make_cleanup (free_current_contents
, &new_line
);
784 execute_command (new_line
, 0);
785 ret
= cmd
->control_type
;
788 case continue_control
:
790 /* Return for "continue", and "break" so we can either
791 continue the loop at the top, or break out. */
792 ret
= cmd
->control_type
;
797 /* Parse the loop control expression for the while statement. */
798 new_line
= insert_args (cmd
->line
);
800 return invalid_control
;
801 old_chain
= make_cleanup (free_current_contents
, &new_line
);
802 expr
= parse_expression (new_line
);
803 make_cleanup (free_current_contents
, &expr
);
805 ret
= simple_control
;
808 /* Keep iterating so long as the expression is true. */
811 /* Evaluate the expression. */
812 val
= evaluate_expression (expr
);
814 /* If the value is false, then break out of the loop. */
815 if (!value_true (val
))
818 /* Execute the body of the while statement. */
819 current
= *cmd
->body_list
;
822 ret
= execute_control_command (current
);
824 /* If we got an error, or a "break" command, then stop
826 if (ret
== invalid_control
|| ret
== break_control
)
832 /* If we got a "continue" command, then restart the loop
834 if (ret
== continue_control
)
837 /* Get the next statement. */
838 current
= current
->next
;
842 /* Reset RET so that we don't recurse the break all the way down. */
843 if (ret
== break_control
)
844 ret
= simple_control
;
851 new_line
= insert_args (cmd
->line
);
853 return invalid_control
;
854 old_chain
= make_cleanup (free_current_contents
, &new_line
);
855 /* Parse the conditional for the if statement. */
856 expr
= parse_expression (new_line
);
857 make_cleanup (free_current_contents
, &expr
);
860 ret
= simple_control
;
862 /* Evaluate the conditional. */
863 val
= evaluate_expression (expr
);
865 /* Choose which arm to take commands from based on the value of the
866 conditional expression. */
867 if (value_true (val
))
868 current
= *cmd
->body_list
;
869 else if (cmd
->body_count
== 2)
870 current
= *(cmd
->body_list
+ 1);
872 /* Execute commands in the given arm. */
875 ret
= execute_control_command (current
);
877 /* If we got an error, get out. */
878 if (ret
!= simple_control
)
881 /* Get the next statement in the body. */
882 current
= current
->next
;
889 warning ("Invalid control type in command structure.");
890 return invalid_control
;
894 do_cleanups (old_chain
);
899 /* "while" command support. Executes a body of statements while the
900 loop condition is nonzero. */
903 while_command (arg
, from_tty
)
907 struct command_line
*command
= NULL
;
910 command
= get_command_line (while_control
, arg
);
915 execute_control_command (command
);
916 free_command_lines (&command
);
919 /* "if" command support. Execute either the true or false arm depending
920 on the value of the if conditional. */
923 if_command (arg
, from_tty
)
927 struct command_line
*command
= NULL
;
930 command
= get_command_line (if_control
, arg
);
935 execute_control_command (command
);
936 free_command_lines (&command
);
943 struct user_args
*oargs
= user_args
;
945 fatal ("Internal error, arg_cleanup called with no user args.\n");
947 user_args
= user_args
->next
;
951 /* Bind the incomming arguments for a user defined command to
952 $arg0, $arg1 ... $argMAXUSERARGS. */
954 static struct cleanup
*
958 struct user_args
*args
;
959 struct cleanup
*old_chain
;
960 unsigned int arg_count
= 0;
962 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
963 memset (args
, 0, sizeof (struct user_args
));
965 args
->next
= user_args
;
968 old_chain
= make_cleanup (arg_cleanup
, 0);
977 if (arg_count
>= MAXUSERARGS
)
979 error ("user defined function may only have %d arguments.\n",
984 /* Strip whitespace. */
985 while (*p
== ' ' || *p
== '\t')
988 /* P now points to an argument. */
990 user_args
->a
[arg_count
].arg
= p
;
992 /* Get to the end of this argument. */
993 while (*p
&& *p
!= ' ' && *p
!= '\t')
996 user_args
->a
[arg_count
].len
= p
- start_arg
;
1003 /* Given character string P, return a point to the first argument ($arg),
1004 or NULL if P contains no arguments. */
1010 while ((p
= strchr (p
, '$')))
1012 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1019 /* Insert the user defined arguments stored in user_arg into the $arg
1020 arguments found in line, with the updated copy being placed into nline. */
1026 char *p
, *save_line
, *new_line
;
1029 /* First we need to know how much memory to allocate for the new line. */
1032 while ((p
= locate_arg (line
)))
1037 if (i
>= user_args
->count
)
1039 error ("Missing argument %d in user function.\n", i
);
1042 len
+= user_args
->a
[i
].len
;
1046 /* Don't forget the tail. */
1047 len
+= strlen (line
);
1049 /* Allocate space for the new line and fill it in. */
1050 new_line
= (char *)xmalloc (len
+ 1);
1051 if (new_line
== NULL
)
1054 /* Restore pointer to beginning of old line. */
1057 /* Save pointer to beginning of new line. */
1058 save_line
= new_line
;
1060 while ((p
= locate_arg (line
)))
1064 memcpy (new_line
, line
, p
- line
);
1065 new_line
+= p
- line
;
1068 len
= user_args
->a
[i
].len
;
1071 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1076 /* Don't forget the tail. */
1077 strcpy (new_line
, line
);
1079 /* Return a pointer to the beginning of the new line. */
1084 execute_user_command (c
, args
)
1085 struct cmd_list_element
*c
;
1088 register struct command_line
*cmdlines
;
1089 struct cleanup
*old_chain
;
1090 enum command_control_type ret
;
1092 old_chain
= setup_user_args (args
);
1094 cmdlines
= c
->user_commands
;
1099 /* Set the instream to 0, indicating execution of a
1100 user-defined function. */
1101 old_chain
= make_cleanup (source_cleanup
, instream
);
1102 instream
= (FILE *) 0;
1105 ret
= execute_control_command (cmdlines
);
1106 if (ret
!= simple_control
&& ret
!= break_control
)
1108 warning ("Error in control structure.\n");
1111 cmdlines
= cmdlines
->next
;
1113 do_cleanups (old_chain
);
1116 /* Execute the line P as a command.
1117 Pass FROM_TTY as second argument to the defining function. */
1120 execute_command (p
, from_tty
)
1124 register struct cmd_list_element
*c
;
1125 register enum language flang
;
1126 static int warned
= 0;
1130 /* This can happen when command_line_input hits end of file. */
1134 while (*p
== ' ' || *p
== '\t') p
++;
1139 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1140 /* Pass null arg rather than an empty one. */
1143 /* If this command has been hooked, run the hook first. */
1145 execute_user_command (c
->hook
, (char *)0);
1147 if (c
->class == class_user
)
1148 execute_user_command (c
, arg
);
1149 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1150 do_setshow_command (arg
, from_tty
& caution
, c
);
1151 else if (c
->function
.cfunc
== NO_FUNCTION
)
1152 error ("That is not a command, just a help topic.");
1153 else if (call_command_hook
)
1154 call_command_hook (c
, arg
, from_tty
& caution
);
1156 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1159 /* Tell the user if the language has changed (except first time). */
1160 if (current_language
!= expected_language
)
1162 if (language_mode
== language_mode_auto
) {
1163 language_info (1); /* Print what changed. */
1168 /* Warn the user if the working language does not match the
1169 language of the current frame. Only warn the user if we are
1170 actually running the program, i.e. there is a stack. */
1171 /* FIXME: This should be cacheing the frame and only running when
1172 the frame changes. */
1174 if (target_has_stack
)
1176 flang
= get_frame_language ();
1178 && flang
!= language_unknown
1179 && flang
!= current_language
->la_language
)
1181 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1189 command_loop_marker (foo
)
1194 /* Read commands from `instream' and execute them
1195 until end of file or error reading instream. */
1200 struct cleanup
*old_chain
;
1202 int stdin_is_tty
= ISATTY (stdin
);
1203 long time_at_cmd_start
;
1204 long space_at_cmd_start
;
1205 extern int display_time
;
1206 extern int display_space
;
1208 while (!feof (instream
))
1210 if (window_hook
&& instream
== stdin
)
1211 (*window_hook
) (instream
, prompt
);
1214 if (instream
== stdin
&& stdin_is_tty
)
1215 reinitialize_more_filter ();
1216 old_chain
= make_cleanup (command_loop_marker
, 0);
1217 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1218 instream
== stdin
, "prompt");
1222 time_at_cmd_start
= get_run_time ();
1226 extern char **environ
;
1227 char *lim
= (char *) sbrk (0);
1229 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1232 execute_command (command
, instream
== stdin
);
1233 /* Do any commands attached to breakpoint we stopped at. */
1234 bpstat_do_actions (&stop_bpstat
);
1235 do_cleanups (old_chain
);
1239 long cmd_time
= get_run_time () - time_at_cmd_start
;
1241 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1242 cmd_time
/ 1000000, cmd_time
% 1000000);
1247 extern char **environ
;
1248 char *lim
= (char *) sbrk (0);
1249 long space_now
= lim
- (char *) &environ
;
1250 long space_diff
= space_now
- space_at_cmd_start
;
1252 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1254 (space_diff
>= 0 ? '+' : '-'),
1260 /* Commands call this if they do not want to be repeated by null lines. */
1268 /* If we aren't reading from standard input, we are saving the last
1269 thing read from stdin in line and don't want to delete it. Null lines
1270 won't repeat here in any case. */
1271 if (instream
== stdin
)
1275 /* Read a line from the stream "instream" without command line editing.
1277 It prints PRROMPT once at the start.
1278 Action is compatible with "readline", e.g. space for the result is
1279 malloc'd and should be freed by the caller.
1281 A NULL return means end of file. */
1283 gdb_readline (prrompt
)
1288 int input_index
= 0;
1289 int result_size
= 80;
1293 /* Don't use a _filtered function here. It causes the assumed
1294 character position to be off, since the newline we read from
1295 the user is not accounted for. */
1296 fputs_unfiltered (prrompt
, gdb_stdout
);
1298 /* Move to a new line so the entered line doesn't have a prompt
1299 on the front of it. */
1300 fputs_unfiltered ("\n", gdb_stdout
);
1302 gdb_flush (gdb_stdout
);
1305 result
= (char *) xmalloc (result_size
);
1309 /* Read from stdin if we are executing a user defined command.
1310 This is the right thing for prompt_for_continue, at least. */
1311 c
= fgetc (instream
? instream
: stdin
);
1315 if (input_index
> 0)
1316 /* The last line does not end with a newline. Return it, and
1317 if we are called again fgetc will still return EOF and
1318 we'll return NULL then. */
1327 result
[input_index
++] = c
;
1328 while (input_index
>= result_size
)
1331 result
= (char *) xrealloc (result
, result_size
);
1335 result
[input_index
++] = '\0';
1339 /* Variables which control command line editing and history
1340 substitution. These variables are given default values at the end
1342 static int command_editing_p
;
1343 static int history_expansion_p
;
1344 static int write_history_p
;
1345 static int history_size
;
1346 static char *history_filename
;
1348 /* readline uses the word breaks for two things:
1349 (1) In figuring out where to point the TEXT parameter to the
1350 rl_completion_entry_function. Since we don't use TEXT for much,
1351 it doesn't matter a lot what the word breaks are for this purpose, but
1352 it does affect how much stuff M-? lists.
1353 (2) If one of the matches contains a word break character, readline
1354 will quote it. That's why we switch between
1355 gdb_completer_word_break_characters and
1356 gdb_completer_command_word_break_characters. I'm not sure when
1357 we need this behavior (perhaps for funky characters in C++ symbols?). */
1359 /* Variables which are necessary for fancy command line editing. */
1360 char *gdb_completer_word_break_characters
=
1361 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1363 /* When completing on command names, we remove '-' from the list of
1364 word break characters, since we use it in command names. If the
1365 readline library sees one in any of the current completion strings,
1366 it thinks that the string needs to be quoted and automatically supplies
1368 char *gdb_completer_command_word_break_characters
=
1369 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1371 /* Characters that can be used to quote completion strings. Note that we
1372 can't include '"' because the gdb C parser treats such quoted sequences
1374 char *gdb_completer_quote_characters
=
1377 /* Functions that are used as part of the fancy command line editing. */
1379 /* This can be used for functions which don't want to complete on symbols
1380 but don't want to complete on anything else either. */
1383 noop_completer (text
, prefix
)
1390 /* Complete on filenames. */
1392 filename_completer (text
, word
)
1396 /* From readline. */
1397 extern char *filename_completion_function ();
1398 int subsequent_name
;
1400 int return_val_used
;
1401 int return_val_alloced
;
1403 return_val_used
= 0;
1404 /* Small for testing. */
1405 return_val_alloced
= 1;
1406 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1408 subsequent_name
= 0;
1412 p
= filename_completion_function (text
, subsequent_name
);
1413 if (return_val_used
>= return_val_alloced
)
1415 return_val_alloced
*= 2;
1417 (char **) xrealloc (return_val
,
1418 return_val_alloced
* sizeof (char *));
1422 return_val
[return_val_used
++] = p
;
1425 /* Like emacs, don't complete on old versions. Especially useful
1426 in the "source" command. */
1427 if (p
[strlen (p
) - 1] == '~')
1433 /* Return exactly p. */
1434 return_val
[return_val_used
++] = p
;
1435 else if (word
> text
)
1437 /* Return some portion of p. */
1438 q
= xmalloc (strlen (p
) + 5);
1439 strcpy (q
, p
+ (word
- text
));
1440 return_val
[return_val_used
++] = q
;
1445 /* Return some of TEXT plus p. */
1446 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1447 strncpy (q
, word
, text
- word
);
1448 q
[text
- word
] = '\0';
1450 return_val
[return_val_used
++] = q
;
1454 subsequent_name
= 1;
1457 /* There is no way to do this just long enough to affect quote inserting
1458 without also affecting the next completion. This should be fixed in
1460 /* Insure that readline does the right thing
1461 with respect to inserting quotes. */
1462 rl_completer_word_break_characters
= "";
1467 /* Here are some useful test cases for completion. FIXME: These should
1468 be put in the test suite. They should be tested with both M-? and TAB.
1470 "show output-" "radix"
1471 "show output" "-radix"
1472 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1473 "p " ambiguous (all symbols)
1474 "info t foo" no completions
1475 "info t " no completions
1476 "info t" ambiguous ("info target", "info terminal", etc.)
1477 "info ajksdlfk" no completions
1478 "info ajksdlfk " no completions
1480 "info " ambiguous (all info commands)
1481 "p \"a" no completions (string constant)
1482 "p 'a" ambiguous (all symbols starting with a)
1483 "p b-a" ambiguous (all symbols starting with a)
1484 "p b-" ambiguous (all symbols)
1485 "file Make" "file" (word break hard to screw up here)
1486 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1489 /* Generate completions one by one for the completer. Each time we are
1490 called return another potential completion to the caller.
1491 line_completion just completes on commands or passes the buck to the
1492 command's completer function, the stuff specific to symbol completion
1493 is in make_symbol_completion_list.
1495 TEXT is the caller's idea of the "word" we are looking at.
1497 MATCHES is the number of matches that have currently been collected from
1498 calling this completion function. When zero, then we need to initialize,
1499 otherwise the initialization has already taken place and we can just
1500 return the next potential completion string.
1502 LINE_BUFFER is available to be looked at; it contains the entire text
1503 of the line. POINT is the offset in that line of the cursor. You
1504 should pretend that the line ends at POINT.
1506 Returns NULL if there are no more completions, else a pointer to a string
1507 which is a possible completion, it is the caller's responsibility to
1511 line_completion_function (text
, matches
, line_buffer
, point
)
1517 static char **list
= (char **)NULL
; /* Cache of completions */
1518 static int index
; /* Next cached completion */
1519 char *output
= NULL
;
1520 char *tmp_command
, *p
;
1521 /* Pointer within tmp_command which corresponds to text. */
1523 struct cmd_list_element
*c
, *result_list
;
1527 /* The caller is beginning to accumulate a new set of completions, so
1528 we need to find all of them now, and cache them for returning one at
1529 a time on future calls. */
1533 /* Free the storage used by LIST, but not by the strings inside.
1534 This is because rl_complete_internal () frees the strings. */
1540 /* Choose the default set of word break characters to break completions.
1541 If we later find out that we are doing completions on command strings
1542 (as opposed to strings supplied by the individual command completer
1543 functions, which can be any string) then we will switch to the
1544 special word break set for command strings, which leaves out the
1545 '-' character used in some commands. */
1547 rl_completer_word_break_characters
=
1548 gdb_completer_word_break_characters
;
1550 /* Decide whether to complete on a list of gdb commands or on symbols. */
1551 tmp_command
= (char *) alloca (point
+ 1);
1554 strncpy (tmp_command
, line_buffer
, point
);
1555 tmp_command
[point
] = '\0';
1556 /* Since text always contains some number of characters leading up
1557 to point, we can find the equivalent position in tmp_command
1558 by subtracting that many characters from the end of tmp_command. */
1559 word
= tmp_command
+ point
- strlen (text
);
1563 /* An empty line we want to consider ambiguous; that is, it
1564 could be any command. */
1565 c
= (struct cmd_list_element
*) -1;
1570 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1573 /* Move p up to the next interesting thing. */
1574 while (*p
== ' ' || *p
== '\t')
1581 /* It is an unrecognized command. So there are no
1582 possible completions. */
1585 else if (c
== (struct cmd_list_element
*) -1)
1589 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1590 doesn't advance over that thing itself. Do so now. */
1592 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1594 if (q
!= tmp_command
+ point
)
1596 /* There is something beyond the ambiguous
1597 command, so there are no possible completions. For
1598 example, "info t " or "info t foo" does not complete
1599 to anything, because "info t" can be "info target" or
1605 /* We're trying to complete on the command which was ambiguous.
1606 This we can deal with. */
1609 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1614 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1616 /* Insure that readline does the right thing with respect to
1617 inserting quotes. */
1618 rl_completer_word_break_characters
=
1619 gdb_completer_command_word_break_characters
;
1624 /* We've recognized a full command. */
1626 if (p
== tmp_command
+ point
)
1628 /* There is no non-whitespace in the line beyond the command. */
1630 if (p
[-1] == ' ' || p
[-1] == '\t')
1632 /* The command is followed by whitespace; we need to complete
1633 on whatever comes after command. */
1636 /* It is a prefix command; what comes after it is
1637 a subcommand (e.g. "info "). */
1638 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1640 /* Insure that readline does the right thing
1641 with respect to inserting quotes. */
1642 rl_completer_word_break_characters
=
1643 gdb_completer_command_word_break_characters
;
1647 list
= complete_on_enum (c
->enums
, p
, word
);
1648 rl_completer_word_break_characters
=
1649 gdb_completer_command_word_break_characters
;
1653 /* It is a normal command; what comes after it is
1654 completed by the command's completer function. */
1655 list
= (*c
->completer
) (p
, word
);
1660 /* The command is not followed by whitespace; we need to
1661 complete on the command itself. e.g. "p" which is a
1662 command itself but also can complete to "print", "ptype"
1666 /* Find the command we are completing on. */
1668 while (q
> tmp_command
)
1670 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1676 list
= complete_on_cmdlist (result_list
, q
, word
);
1678 /* Insure that readline does the right thing
1679 with respect to inserting quotes. */
1680 rl_completer_word_break_characters
=
1681 gdb_completer_command_word_break_characters
;
1686 /* There is non-whitespace beyond the command. */
1688 if (c
->prefixlist
&& !c
->allow_unknown
)
1690 /* It is an unrecognized subcommand of a prefix command,
1691 e.g. "info adsfkdj". */
1696 list
= complete_on_enum (c
->enums
, p
, word
);
1700 /* It is a normal command. */
1701 list
= (*c
->completer
) (p
, word
);
1707 /* If we found a list of potential completions during initialization then
1708 dole them out one at a time. The vector of completions is NULL
1709 terminated, so after returning the last one, return NULL (and continue
1710 to do so) each time we are called after that, until a new list is
1715 output
= list
[index
];
1723 /* Can't do this because readline hasn't yet checked the word breaks
1724 for figuring out whether to insert a quote. */
1726 /* Make sure the word break characters are set back to normal for the
1727 next time that readline tries to complete something. */
1728 rl_completer_word_break_characters
=
1729 gdb_completer_word_break_characters
;
1735 /* Line completion interface function for readline. */
1738 readline_line_completion_function (text
, matches
)
1742 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1745 /* Skip over a possibly quoted word (as defined by the quote characters
1746 and word break characters the completer uses). Returns pointer to the
1747 location after the "word". */
1753 char quote_char
= '\0';
1756 for (scan
= str
; *scan
!= '\0'; scan
++)
1758 if (quote_char
!= '\0')
1760 /* Ignore everything until the matching close quote char */
1761 if (*scan
== quote_char
)
1763 /* Found matching close quote. */
1768 else if (strchr (gdb_completer_quote_characters
, *scan
))
1770 /* Found start of a quoted string. */
1773 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1787 #if STOP_SIGNAL == SIGTSTP
1788 signal (SIGTSTP
, SIG_DFL
);
1790 kill (getpid (), SIGTSTP
);
1791 signal (SIGTSTP
, stop_sig
);
1793 signal (STOP_SIGNAL
, stop_sig
);
1795 printf_unfiltered ("%s", prompt
);
1796 gdb_flush (gdb_stdout
);
1798 /* Forget about any previous command -- null line now will do nothing. */
1801 #endif /* STOP_SIGNAL */
1803 /* Initialize signal handlers. */
1813 signal (SIGINT
, request_quit
);
1815 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1816 passed to the inferior, which we don't want. It would be
1817 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1818 on BSD4.3 systems using vfork, that can affect the
1819 GDB process as well as the inferior (the signal handling tables
1820 might be in memory, shared between the two). Since we establish
1821 a handler for SIGQUIT, when we call exec it will set the signal
1822 to SIG_DFL for us. */
1823 signal (SIGQUIT
, do_nothing
);
1824 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1825 signal (SIGHUP
, disconnect
);
1826 signal (SIGFPE
, float_handler
);
1828 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1829 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1833 /* Read one line from the command input stream `instream'
1834 into the local static buffer `linebuffer' (whose current length
1836 The buffer is made bigger as necessary.
1837 Returns the address of the start of the line.
1839 NULL is returned for end of file.
1841 *If* the instream == stdin & stdin is a terminal, the line read
1842 is copied into the file line saver (global var char *line,
1843 length linesize) so that it can be duplicated.
1845 This routine either uses fancy command line editing or
1846 simple input as the user has requested. */
1849 command_line_input (prrompt
, repeat
, annotation_suffix
)
1852 char *annotation_suffix
;
1854 static char *linebuffer
= 0;
1855 static unsigned linelength
= 0;
1859 char *local_prompt
= prrompt
;
1864 /* The annotation suffix must be non-NULL. */
1865 if (annotation_suffix
== NULL
)
1866 annotation_suffix
= "";
1868 if (annotation_level
> 1 && instream
== stdin
)
1870 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1871 + strlen (annotation_suffix
) + 40);
1872 if (prrompt
== NULL
)
1873 local_prompt
[0] = '\0';
1875 strcpy (local_prompt
, prrompt
);
1876 strcat (local_prompt
, "\n\032\032");
1877 strcat (local_prompt
, annotation_suffix
);
1878 strcat (local_prompt
, "\n");
1881 if (linebuffer
== 0)
1884 linebuffer
= (char *) xmalloc (linelength
);
1889 /* Control-C quits instantly if typed while in this loop
1890 since it should not wait until the user types a newline. */
1894 signal (STOP_SIGNAL
, stop_sig
);
1899 /* Make sure that all output has been output. Some machines may let
1900 you get away with leaving out some of the gdb_flush, but not all. */
1902 gdb_flush (gdb_stdout
);
1903 gdb_flush (gdb_stderr
);
1905 if (source_file_name
!= NULL
)
1907 ++source_line_number
;
1908 sprintf (source_error
,
1909 "%s%s:%d: Error in sourced command file:\n",
1912 source_line_number
);
1913 error_pre_print
= source_error
;
1916 if (annotation_level
> 1 && instream
== stdin
)
1918 printf_unfiltered ("\n\032\032pre-");
1919 printf_unfiltered (annotation_suffix
);
1920 printf_unfiltered ("\n");
1923 /* Don't use fancy stuff if not talking to stdin. */
1924 if (command_editing_p
&& instream
== stdin
1925 && ISATTY (instream
))
1926 rl
= readline (local_prompt
);
1928 rl
= gdb_readline (local_prompt
);
1930 if (annotation_level
> 1 && instream
== stdin
)
1932 printf_unfiltered ("\n\032\032post-");
1933 printf_unfiltered (annotation_suffix
);
1934 printf_unfiltered ("\n");
1937 if (!rl
|| rl
== (char *) EOF
)
1942 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1944 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1945 nline
= (char *) xrealloc (linebuffer
, linelength
);
1946 p
+= nline
- linebuffer
;
1950 /* Copy line. Don't copy null at end. (Leaves line alone
1951 if this was just a newline) */
1955 free (rl
); /* Allocated in readline. */
1957 if (p
== linebuffer
|| *(p
- 1) != '\\')
1960 p
--; /* Put on top of '\'. */
1961 local_prompt
= (char *) 0;
1966 signal (STOP_SIGNAL
, SIG_DFL
);
1973 #define SERVER_COMMAND_LENGTH 7
1975 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1976 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1979 /* Note that we don't set `line'. Between this and the check in
1980 dont_repeat, this insures that repeating will still do the
1983 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1986 /* Do history expansion if that is wished. */
1987 if (history_expansion_p
&& instream
== stdin
1988 && ISATTY (instream
))
1990 char *history_value
;
1993 *p
= '\0'; /* Insert null now. */
1994 expanded
= history_expand (linebuffer
, &history_value
);
1997 /* Print the changes. */
1998 printf_unfiltered ("%s\n", history_value
);
2000 /* If there was an error, call this function again. */
2003 free (history_value
);
2004 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2006 if (strlen (history_value
) > linelength
)
2008 linelength
= strlen (history_value
) + 1;
2009 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2011 strcpy (linebuffer
, history_value
);
2012 p
= linebuffer
+ strlen(linebuffer
);
2013 free (history_value
);
2017 /* If we just got an empty line, and that is supposed
2018 to repeat the previous command, return the value in the
2022 if (p
== linebuffer
)
2025 while (*p1
== ' ' || *p1
== '\t')
2033 /* Add line to history if appropriate. */
2034 if (instream
== stdin
2035 && ISATTY (stdin
) && *linebuffer
)
2036 add_history (linebuffer
);
2038 /* Note: lines consisting solely of comments are added to the command
2039 history. This is useful when you type a command, and then
2040 realize you don't want to execute it quite yet. You can comment
2041 out the command and then later fetch it from the value history
2042 and remove the '#'. The kill ring is probably better, but some
2043 people are in the habit of commenting things out. */
2045 while ((c
= *p1
++) != '\0')
2048 while ((c
= *p1
++) != '"')
2050 /* Make sure an escaped '"' doesn't make us think the string
2058 while ((c
= *p1
++) != '\'')
2060 /* Make sure an escaped '\'' doesn't make us think the string
2069 /* Found a comment. */
2075 /* Save into global buffer if appropriate. */
2078 if (linelength
> linesize
)
2080 line
= xrealloc (line
, linelength
);
2081 linesize
= linelength
;
2083 strcpy (line
, linebuffer
);
2091 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2092 code bodies. This is typically used when we encounter an "else"
2093 clause for an "if" command. */
2096 realloc_body_list (command
, new_length
)
2097 struct command_line
*command
;
2101 struct command_line
**body_list
;
2103 n
= command
->body_count
;
2105 /* Nothing to do? */
2106 if (new_length
<= n
)
2109 body_list
= (struct command_line
**)
2110 xmalloc (sizeof (struct command_line
*) * new_length
);
2112 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2114 free (command
->body_list
);
2115 command
->body_list
= body_list
;
2116 command
->body_count
= new_length
;
2119 /* Read one line from the input stream. If the command is an "else" or
2120 "end", return such an indication to the caller. */
2122 static enum misc_command_type
2123 read_next_line (command
)
2124 struct command_line
**command
;
2126 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2129 if (control_level
>= 254)
2130 error ("Control nesting too deep!\n");
2132 /* Set a prompt based on the nesting of the control commands. */
2133 if (instream
== stdin
)
2135 for (i
= 0; i
< control_level
; i
++)
2136 control_prompt
[i
] = ' ';
2137 control_prompt
[i
] = '>';
2138 control_prompt
[i
+1] = '\0';
2139 prompt_ptr
= (char *)&control_prompt
[0];
2144 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2146 /* Not sure what to do here. */
2150 /* Strip leading and trailing whitespace. */
2151 while (*p
== ' ' || *p
== '\t')
2154 p1
= p
+ strlen (p
);
2155 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2158 /* Blanks and comments don't really do anything, but we need to
2159 distinguish them from else, end and other commands which can be
2161 if (p1
== p
|| p
[0] == '#')
2164 /* Is this the end of a simple, while, or if control structure? */
2165 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2168 /* Is the else clause of an if control structure? */
2169 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2170 return else_command
;
2172 /* Check for while, if, break, continue, etc and build a new command
2173 line structure for them. */
2174 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2175 *command
= build_command_line (while_control
, p
+ 6);
2176 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2177 *command
= build_command_line (if_control
, p
+ 3);
2178 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2180 *command
= (struct command_line
*)
2181 xmalloc (sizeof (struct command_line
));
2182 (*command
)->next
= NULL
;
2183 (*command
)->line
= NULL
;
2184 (*command
)->control_type
= break_control
;
2185 (*command
)->body_count
= 0;
2186 (*command
)->body_list
= NULL
;
2188 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2190 *command
= (struct command_line
*)
2191 xmalloc (sizeof (struct command_line
));
2192 (*command
)->next
= NULL
;
2193 (*command
)->line
= NULL
;
2194 (*command
)->control_type
= continue_control
;
2195 (*command
)->body_count
= 0;
2196 (*command
)->body_list
= NULL
;
2200 /* A normal command. */
2201 *command
= (struct command_line
*)
2202 xmalloc (sizeof (struct command_line
));
2203 (*command
)->next
= NULL
;
2204 (*command
)->line
= savestring (p
, p1
- p
);
2205 (*command
)->control_type
= simple_control
;
2206 (*command
)->body_count
= 0;
2207 (*command
)->body_list
= NULL
;
2210 /* Nothing special. */
2214 /* Recursively read in the control structures and create a command_line
2217 The parent_control parameter is the control structure in which the
2218 following commands are nested. */
2220 static enum command_control_type
2221 recurse_read_control_structure (current_cmd
)
2222 struct command_line
*current_cmd
;
2224 int current_body
, i
;
2225 enum misc_command_type val
;
2226 enum command_control_type ret
;
2227 struct command_line
**body_ptr
, *child_tail
, *next
;
2228 struct cleanup
*old_chains
, *tmp_chains
;
2234 /* Sanity checks. */
2235 if (current_cmd
->control_type
== simple_control
)
2237 error ("Recursed on a simple control type\n");
2238 return invalid_control
;
2241 if (current_body
> current_cmd
->body_count
)
2243 error ("Allocated body is smaller than this command type needs\n");
2244 return invalid_control
;
2247 /* Read lines from the input stream and build control structures. */
2253 val
= read_next_line (&next
);
2255 /* Just skip blanks and comments. */
2256 if (val
== nop_command
)
2259 if (val
== end_command
)
2261 if (current_cmd
->control_type
== while_control
2262 || current_cmd
->control_type
== if_control
)
2264 /* Success reading an entire control structure. */
2265 ret
= simple_control
;
2270 ret
= invalid_control
;
2275 /* Not the end of a control structure. */
2276 if (val
== else_command
)
2278 if (current_cmd
->control_type
== if_control
2279 && current_body
== 1)
2281 realloc_body_list (current_cmd
, 2);
2288 ret
= invalid_control
;
2295 child_tail
->next
= next
;
2299 /* We have just read the first line of the child's control
2300 structure. From now on, arrange to throw away the line
2301 we have if we quit or get an error. */
2302 body_ptr
= current_cmd
->body_list
;
2303 for (i
= 1; i
< current_body
; i
++)
2308 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2311 old_chains
= tmp_chains
;
2316 /* If the latest line is another control structure, then recurse
2318 if (next
->control_type
== while_control
2319 || next
->control_type
== if_control
)
2322 ret
= recurse_read_control_structure (next
);
2325 if (ret
!= simple_control
)
2331 if (ret
== invalid_control
&& old_chains
)
2332 do_cleanups (old_chains
);
2333 else if (old_chains
)
2334 discard_cleanups (old_chains
);
2340 /* Read lines from the input stream
2341 and accumulate them in a chain of struct command_line's
2342 which is then returned. */
2344 struct command_line
*
2345 read_command_lines ()
2347 struct command_line
*head
, *tail
, *next
;
2348 struct cleanup
*old_chain
;
2349 enum command_control_type ret
;
2350 enum misc_command_type val
;
2357 val
= read_next_line (&next
);
2359 /* Ignore blank lines or comments. */
2360 if (val
== nop_command
)
2363 if (val
== end_command
)
2365 ret
= simple_control
;
2369 if (val
!= ok_command
)
2371 ret
= invalid_control
;
2375 if (next
->control_type
== while_control
2376 || next
->control_type
== if_control
)
2379 ret
= recurse_read_control_structure (next
);
2382 if (ret
== invalid_control
)
2393 old_chain
= make_cleanup (free_command_lines
, &head
);
2402 if (ret
!= invalid_control
)
2404 discard_cleanups (old_chain
);
2408 do_cleanups (old_chain
);
2414 /* Free a chain of struct command_line's. */
2417 free_command_lines (lptr
)
2418 struct command_line
**lptr
;
2420 register struct command_line
*l
= *lptr
;
2421 register struct command_line
*next
;
2422 struct command_line
**blist
;
2427 if (l
->body_count
> 0)
2429 blist
= l
->body_list
;
2430 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2431 free_command_lines (blist
);
2440 /* Add an element to the list of info subcommands. */
2443 add_info (name
, fun
, doc
)
2445 void (*fun
) PARAMS ((char *, int));
2448 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2451 /* Add an alias to the list of info subcommands. */
2454 add_info_alias (name
, oldname
, abbrev_flag
)
2459 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2462 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2463 Therefore, its own definition is called only for "info" with no args. */
2467 info_command (arg
, from_tty
)
2471 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2472 help_list (infolist
, "info ", -1, gdb_stdout
);
2475 /* The "complete" command is used by Emacs to implement completion. */
2479 complete_command (arg
, from_tty
)
2491 argpoint
= strlen (arg
);
2493 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2495 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2497 printf_unfiltered ("%s\n", completion
);
2502 /* The "show" command with no arguments shows all the settings. */
2506 show_command (arg
, from_tty
)
2510 cmd_show_list (showlist
, from_tty
, "");
2513 /* Add an element to the list of commands. */
2516 add_com (name
, class, fun
, doc
)
2518 enum command_class
class;
2519 void (*fun
) PARAMS ((char *, int));
2522 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2525 /* Add an alias or abbreviation command to the list of commands. */
2528 add_com_alias (name
, oldname
, class, abbrev_flag
)
2531 enum command_class
class;
2534 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2541 error ("Argument required (%s).", why
);
2546 help_command (command
, from_tty
)
2548 int from_tty
; /* Ignored */
2550 help_cmd (command
, gdb_stdout
);
2554 validate_comname (comname
)
2560 error_no_arg ("name of command to define");
2565 if (!isalnum(*p
) && *p
!= '-')
2566 error ("Junk in argument list: \"%s\"", p
);
2571 /* This is just a placeholder in the command data structures. */
2573 user_defined_command (ignore
, from_tty
)
2580 define_command (comname
, from_tty
)
2584 register struct command_line
*cmds
;
2585 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2586 char *tem
= comname
;
2587 #define HOOK_STRING "hook-"
2590 validate_comname (comname
);
2592 /* Look it up, and verify that we got an exact match. */
2593 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2594 if (c
&& !STREQ (comname
, c
->name
))
2599 if (c
->class == class_user
|| c
->class == class_alias
)
2600 tem
= "Redefine command \"%s\"? ";
2602 tem
= "Really redefine built-in command \"%s\"? ";
2603 if (!query (tem
, c
->name
))
2604 error ("Command \"%s\" not redefined.", c
->name
);
2607 /* If this new command is a hook, then mark the command which it
2608 is hooking. Note that we allow hooking `help' commands, so that
2609 we can hook the `stop' pseudo-command. */
2611 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2613 /* Look up cmd it hooks, and verify that we got an exact match. */
2614 tem
= comname
+HOOK_LEN
;
2615 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2616 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2620 warning ("Your new `%s' command does not hook any existing command.",
2622 if (!query ("Proceed? "))
2623 error ("Not confirmed.");
2627 comname
= savestring (comname
, strlen (comname
));
2629 /* If the rest of the commands will be case insensitive, this one
2630 should behave in the same manner. */
2631 for (tem
= comname
; *tem
; tem
++)
2632 if (isupper(*tem
)) *tem
= tolower(*tem
);
2636 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2637 End with a line saying just \"end\".\n", comname
);
2638 gdb_flush (gdb_stdout
);
2642 cmds
= read_command_lines ();
2644 if (c
&& c
->class == class_user
)
2645 free_command_lines (&c
->user_commands
);
2647 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2648 (c
&& c
->class == class_user
)
2649 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2650 newc
->user_commands
= cmds
;
2652 /* If this new command is a hook, then mark both commands as being
2656 hookc
->hook
= newc
; /* Target gets hooked. */
2657 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2662 document_command (comname
, from_tty
)
2666 struct command_line
*doclines
;
2667 register struct cmd_list_element
*c
;
2668 char *tem
= comname
;
2670 validate_comname (comname
);
2672 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2674 if (c
->class != class_user
)
2675 error ("Command \"%s\" is built-in.", comname
);
2678 printf_unfiltered ("Type documentation for \"%s\".\n\
2679 End with a line saying just \"end\".\n", comname
);
2681 doclines
= read_command_lines ();
2683 if (c
->doc
) free (c
->doc
);
2686 register struct command_line
*cl1
;
2687 register int len
= 0;
2689 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2690 len
+= strlen (cl1
->line
) + 1;
2692 c
->doc
= (char *) xmalloc (len
+ 1);
2695 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2697 strcat (c
->doc
, cl1
->line
);
2699 strcat (c
->doc
, "\n");
2703 free_command_lines (&doclines
);
2707 print_gnu_advertisement ()
2709 printf_unfiltered ("\
2710 GDB is free software and you are welcome to distribute copies of it\n\
2711 under certain conditions; type \"show copying\" to see the conditions.\n\
2712 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2717 print_gdb_version (stream
)
2720 fprintf_filtered (stream
, "\
2721 GDB %s (%s", version
, host_name
);
2723 if (!STREQ (host_name
, target_name
))
2724 fprintf_filtered (stream
, " --target %s", target_name
);
2726 fprintf_filtered (stream
, "), ");
2728 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2733 show_version (args
, from_tty
)
2738 print_gnu_advertisement ();
2739 print_gdb_version (gdb_stdout
);
2740 printf_filtered ("\n");
2744 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2750 printf_unfiltered ("%s", prompt
);
2751 gdb_flush (gdb_stdout
);
2755 quit_command (args
, from_tty
)
2759 if (inferior_pid
!= 0 && target_has_execution
)
2763 if (query ("The program is running. Quit anyway (and detach it)? "))
2764 target_detach (args
, from_tty
);
2766 error ("Not confirmed.");
2770 if (query ("The program is running. Quit anyway (and kill it)? "))
2773 error ("Not confirmed.");
2776 /* UDI wants this, to kill the TIP. */
2779 /* Save the history information if it is appropriate to do so. */
2780 if (write_history_p
&& history_filename
)
2781 write_history (history_filename
);
2786 /* Returns whether GDB is running on a terminal and whether the user
2787 desires that questions be asked of them on that terminal. */
2790 input_from_terminal_p ()
2792 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2797 pwd_command (args
, from_tty
)
2801 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2802 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2804 if (!STREQ (gdb_dirbuf
, current_directory
))
2805 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2806 current_directory
, gdb_dirbuf
);
2808 printf_unfiltered ("Working directory %s.\n", current_directory
);
2812 cd_command (dir
, from_tty
)
2817 /* Found something other than leading repetitions of "/..". */
2818 int found_real_path
;
2821 /* If the new directory is absolute, repeat is a no-op; if relative,
2822 repeat might be useful but is more likely to be a mistake. */
2826 error_no_arg ("new working directory");
2828 dir
= tilde_expand (dir
);
2829 make_cleanup (free
, dir
);
2831 if (chdir (dir
) < 0)
2832 perror_with_name (dir
);
2835 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2837 current_directory
= dir
;
2840 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2841 current_directory
= concat (current_directory
, dir
, NULL
);
2843 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2847 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2849 found_real_path
= 0;
2850 for (p
= current_directory
; *p
;)
2852 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2854 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2855 && (p
[3] == 0 || SLASH_P (p
[3])))
2857 if (found_real_path
)
2859 /* Search backwards for the directory just before the "/.."
2860 and obliterate it and the "/..". */
2862 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2865 if (q
== current_directory
)
2866 /* current_directory is
2867 a relative pathname ("can't happen"--leave it alone). */
2871 strcpy (q
- 1, p
+ 3);
2876 /* We are dealing with leading repetitions of "/..", for example
2877 "/../..", which is the Mach super-root. */
2882 found_real_path
= 1;
2887 forget_cached_source_info ();
2890 pwd_command ((char *) 0, 1);
2893 struct source_cleanup_lines_args
{
2896 char *old_pre_error
;
2897 char *old_error_pre_print
;
2901 source_cleanup_lines (args
)
2904 struct source_cleanup_lines_args
*p
=
2905 (struct source_cleanup_lines_args
*)args
;
2906 source_line_number
= p
->old_line
;
2907 source_file_name
= p
->old_file
;
2908 source_pre_error
= p
->old_pre_error
;
2909 error_pre_print
= p
->old_error_pre_print
;
2914 source_command (args
, from_tty
)
2919 struct cleanup
*old_cleanups
;
2921 struct source_cleanup_lines_args old_lines
;
2926 error ("source command requires pathname of file to source.");
2929 file
= tilde_expand (file
);
2930 old_cleanups
= make_cleanup (free
, file
);
2932 stream
= fopen (file
, FOPEN_RT
);
2934 perror_with_name (file
);
2936 make_cleanup (fclose
, stream
);
2938 old_lines
.old_line
= source_line_number
;
2939 old_lines
.old_file
= source_file_name
;
2940 old_lines
.old_pre_error
= source_pre_error
;
2941 old_lines
.old_error_pre_print
= error_pre_print
;
2942 make_cleanup (source_cleanup_lines
, &old_lines
);
2943 source_line_number
= 0;
2944 source_file_name
= file
;
2945 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2946 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2947 make_cleanup (free
, source_pre_error
);
2948 /* This will get set every time we read a line. So it won't stay "" for
2950 error_pre_print
= "";
2952 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2953 if (source_error_allocated
< needed_length
)
2955 source_error_allocated
*= 2;
2956 if (source_error_allocated
< needed_length
)
2957 source_error_allocated
= needed_length
;
2958 if (source_error
== NULL
)
2959 source_error
= xmalloc (source_error_allocated
);
2961 source_error
= xrealloc (source_error
, source_error_allocated
);
2964 read_command_file (stream
);
2966 do_cleanups (old_cleanups
);
2971 echo_command (text
, from_tty
)
2979 while ((c
= *p
++) != '\0')
2983 /* \ at end of argument is used after spaces
2984 so they won't be lost. */
2988 c
= parse_escape (&p
);
2990 printf_filtered ("%c", c
);
2993 printf_filtered ("%c", c
);
2996 /* Force this output to appear now. */
2998 gdb_flush (gdb_stdout
);
3002 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3004 /* Functions to manipulate the endianness of the target. */
3006 #ifndef TARGET_BYTE_ORDER_DEFAULT
3007 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3010 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3012 static int target_byte_order_auto
= 1;
3014 /* Called if the user enters ``set endian'' without an argument. */
3016 set_endian (args
, from_tty
)
3020 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3021 show_endian (args
, from_tty
);
3024 /* Called by ``set endian big''. */
3026 set_endian_big (args
, from_tty
)
3030 target_byte_order
= BIG_ENDIAN
;
3031 target_byte_order_auto
= 0;
3034 /* Called by ``set endian little''. */
3036 set_endian_little (args
, from_tty
)
3040 target_byte_order
= LITTLE_ENDIAN
;
3041 target_byte_order_auto
= 0;
3044 /* Called by ``set endian auto''. */
3046 set_endian_auto (args
, from_tty
)
3050 target_byte_order_auto
= 1;
3053 /* Called by ``show endian''. */
3055 show_endian (args
, from_tty
)
3060 (target_byte_order_auto
3061 ? "The target endianness is set automatically (currently %s endian)\n"
3062 : "The target is assumed to be %s endian\n");
3063 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3066 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3068 /* Set the endianness from a BFD. */
3070 set_endian_from_file (abfd
)
3073 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3076 if (abfd
->xvec
->byteorder_big_p
)
3079 want
= LITTLE_ENDIAN
;
3080 if (target_byte_order_auto
)
3081 target_byte_order
= want
;
3082 else if (target_byte_order
!= want
)
3083 warning ("%s endian file does not match %s endian target.",
3084 want
== BIG_ENDIAN
? "big" : "little",
3085 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3087 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3089 if (abfd
->xvec
->byteorder_big_p
3090 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3091 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3092 warning ("%s endian file does not match %s endian target.",
3093 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3094 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3096 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3099 /* Functions to manipulate command line editing control variables. */
3101 /* Number of commands to print in each call to show_commands. */
3102 #define Hist_print 10
3104 show_commands (args
, from_tty
)
3108 /* Index for history commands. Relative to history_base. */
3111 /* Number of the history entry which we are planning to display next.
3112 Relative to history_base. */
3115 /* The first command in the history which doesn't exist (i.e. one more
3116 than the number of the last command). Relative to history_base. */
3119 extern HIST_ENTRY
*history_get
PARAMS ((int));
3121 /* Print out some of the commands from the command history. */
3122 /* First determine the length of the history list. */
3123 hist_len
= history_size
;
3124 for (offset
= 0; offset
< history_size
; offset
++)
3126 if (!history_get (history_base
+ offset
))
3135 if (args
[0] == '+' && args
[1] == '\0')
3136 /* "info editing +" should print from the stored position. */
3139 /* "info editing <exp>" should print around command number <exp>. */
3140 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3142 /* "show commands" means print the last Hist_print commands. */
3145 num
= hist_len
- Hist_print
;
3151 /* If there are at least Hist_print commands, we want to display the last
3152 Hist_print rather than, say, the last 6. */
3153 if (hist_len
- num
< Hist_print
)
3155 num
= hist_len
- Hist_print
;
3160 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3162 printf_filtered ("%5d %s\n", history_base
+ offset
,
3163 (history_get (history_base
+ offset
))->line
);
3166 /* The next command we want to display is the next one that we haven't
3170 /* If the user repeats this command with return, it should do what
3171 "show commands +" does. This is unnecessary if arg is null,
3172 because "show commands +" is not useful after "show commands". */
3173 if (from_tty
&& args
)
3180 /* Called by do_setshow_command. */
3183 set_history_size_command (args
, from_tty
, c
)
3186 struct cmd_list_element
*c
;
3188 if (history_size
== INT_MAX
)
3189 unstifle_history ();
3190 else if (history_size
>= 0)
3191 stifle_history (history_size
);
3194 history_size
= INT_MAX
;
3195 error ("History size must be non-negative");
3201 set_history (args
, from_tty
)
3205 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3206 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3211 show_history (args
, from_tty
)
3215 cmd_show_list (showhistlist
, from_tty
, "");
3218 int info_verbose
= 0; /* Default verbose msgs off */
3220 /* Called by do_setshow_command. An elaborate joke. */
3223 set_verbose (args
, from_tty
, c
)
3226 struct cmd_list_element
*c
;
3228 char *cmdname
= "verbose";
3229 struct cmd_list_element
*showcmd
;
3231 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3235 c
->doc
= "Set verbose printing of informational messages.";
3236 showcmd
->doc
= "Show verbose printing of informational messages.";
3240 c
->doc
= "Set verbosity.";
3241 showcmd
->doc
= "Show verbosity.";
3246 float_handler (signo
)
3249 /* This message is based on ANSI C, section 4.7. Note that integer
3250 divide by zero causes this, so "float" is a misnomer. */
3251 signal (SIGFPE
, float_handler
);
3252 error ("Erroneous arithmetic operation.");
3264 enablebreaklist
= NULL
;
3268 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3272 showhistlist
= NULL
;
3273 unsethistlist
= NULL
;
3274 #if MAINTENANCE_CMDS
3275 maintenancelist
= NULL
;
3276 maintenanceinfolist
= NULL
;
3277 maintenanceprintlist
= NULL
;
3279 setprintlist
= NULL
;
3280 showprintlist
= NULL
;
3281 setchecklist
= NULL
;
3282 showchecklist
= NULL
;
3285 /* Init the history buffer. Note that we are called after the init file(s)
3286 * have been read so that the user can change the history file via his
3287 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3288 * overrides all of this.
3296 tmpenv
= getenv ("HISTSIZE");
3298 history_size
= atoi (tmpenv
);
3299 else if (!history_size
)
3302 stifle_history (history_size
);
3304 tmpenv
= getenv ("GDBHISTFILE");
3306 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3307 else if (!history_filename
) {
3308 /* We include the current directory so that if the user changes
3309 directories the file written will be the same as the one
3311 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3313 read_history (history_filename
);
3319 struct cmd_list_element
*c
;
3321 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3323 add_prefix_cmd ("endian", class_support
, set_endian
,
3324 "Set endianness of target.",
3325 &endianlist
, "set endian ", 0, &setlist
);
3326 add_cmd ("big", class_support
, set_endian_big
,
3327 "Set target as being big endian.", &endianlist
);
3328 add_cmd ("little", class_support
, set_endian_little
,
3329 "Set target as being little endian.", &endianlist
);
3330 add_cmd ("auto", class_support
, set_endian_auto
,
3331 "Select target endianness automatically.", &endianlist
);
3332 add_cmd ("endian", class_support
, show_endian
,
3333 "Show endianness of target.", &showlist
);
3335 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3337 #ifdef DEFAULT_PROMPT
3338 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3340 prompt
= savestring ("(gdb) ", 6);
3343 /* Set the important stuff up for command editing. */
3344 command_editing_p
= 1;
3345 history_expansion_p
= 0;
3346 write_history_p
= 0;
3348 /* Setup important stuff for command line editing. */
3349 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3350 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3351 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3352 rl_readline_name
= "gdb";
3354 /* Define the classes of commands.
3355 They will appear in the help list in the reverse of this order. */
3357 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3358 "Maintenance commands.\n\
3359 Some gdb commands are provided just for use by gdb maintainers.\n\
3360 These commands are subject to frequent change, and may not be as\n\
3361 well documented as user commands.",
3363 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3364 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3365 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3366 The commands in this class are those defined by the user.\n\
3367 Use the \"define\" command to define a command.", &cmdlist
);
3368 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3369 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3370 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3371 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3372 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3373 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3374 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3375 counting from zero for the innermost (currently executing) frame.\n\n\
3376 At any time gdb identifies one frame as the \"selected\" frame.\n\
3377 Variable lookups are done with respect to the selected frame.\n\
3378 When the program being debugged stops, gdb selects the innermost frame.\n\
3379 The commands below can be used to select other frames by number or address.",
3381 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3383 add_com ("pwd", class_files
, pwd_command
,
3384 "Print working directory. This is used for your program as well.");
3385 c
= add_cmd ("cd", class_files
, cd_command
,
3386 "Set working directory to DIR for debugger and program being debugged.\n\
3387 The change does not take effect for the program being debugged\n\
3388 until the next time it is started.", &cmdlist
);
3389 c
->completer
= filename_completer
;
3392 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3397 add_com ("echo", class_support
, echo_command
,
3398 "Print a constant string. Give string as argument.\n\
3399 C escape sequences may be used in the argument.\n\
3400 No newline is added at the end of the argument;\n\
3401 use \"\\n\" if you want a newline to be printed.\n\
3402 Since leading and trailing whitespace are ignored in command arguments,\n\
3403 if you want to print some you must use \"\\\" before leading whitespace\n\
3404 to be printed or after trailing whitespace.");
3405 add_com ("document", class_support
, document_command
,
3406 "Document a user-defined command.\n\
3407 Give command name as argument. Give documentation on following lines.\n\
3408 End with a line of just \"end\".");
3409 add_com ("define", class_support
, define_command
,
3410 "Define a new command name. Command name is argument.\n\
3411 Definition appears on following lines, one command per line.\n\
3412 End with a line of just \"end\".\n\
3413 Use the \"document\" command to give documentation for the new command.\n\
3414 Commands defined in this way may have up to ten arguments.");
3417 c
= add_cmd ("source", class_support
, source_command
,
3418 "Read commands from a file named FILE.\n\
3419 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3420 when gdb is started.", &cmdlist
);
3422 /* Punt file name, we can't help it easily. */
3423 c
= add_cmd ("source", class_support
, source_command
,
3424 "Read commands from a file named FILE.\n\
3425 Note that the file \".gdbinit\" is read automatically in this way\n\
3426 when gdb is started.", &cmdlist
);
3428 c
->completer
= filename_completer
;
3430 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3431 add_com ("help", class_support
, help_command
, "Print list of commands.");
3432 add_com_alias ("q", "quit", class_support
, 1);
3433 add_com_alias ("h", "help", class_support
, 1);
3436 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3439 add_show_from_set (c
, &showlist
);
3440 c
->function
.sfunc
= set_verbose
;
3441 set_verbose (NULL
, 0, c
);
3444 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3445 "Set editing of command lines as they are typed.\n\
3446 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3447 Without an argument, command line editing is enabled. To edit, use\n\
3448 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3451 add_prefix_cmd ("history", class_support
, set_history
,
3452 "Generic command for setting command history parameters.",
3453 &sethistlist
, "set history ", 0, &setlist
);
3454 add_prefix_cmd ("history", class_support
, show_history
,
3455 "Generic command for showing command history parameters.",
3456 &showhistlist
, "show history ", 0, &showlist
);
3459 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3460 "Set history expansion on command input.\n\
3461 Without an argument, history expansion is enabled.", &sethistlist
),
3465 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3466 "Set saving of the history record on exit.\n\
3467 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3468 Without an argument, saving is enabled.", &sethistlist
),
3471 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3472 "Set the size of the command history, \n\
3473 ie. the number of previous commands to keep a record of.", &sethistlist
);
3474 add_show_from_set (c
, &showhistlist
);
3475 c
->function
.sfunc
= set_history_size_command
;
3478 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3479 "Set the filename in which to record the command history\n\
3480 (the list of previous commands of which a record is kept).", &sethistlist
),
3484 (add_set_cmd ("confirm", class_support
, var_boolean
,
3486 "Set whether to confirm potentially dangerous operations.",
3490 add_prefix_cmd ("info", class_info
, info_command
,
3491 "Generic command for showing things about the program being debugged.",
3492 &infolist
, "info ", 0, &cmdlist
);
3493 add_com_alias ("i", "info", class_info
, 1);
3495 add_com ("complete", class_obscure
, complete_command
,
3496 "List the completions for the rest of the line as a command.");
3498 add_prefix_cmd ("show", class_info
, show_command
,
3499 "Generic command for showing things about the debugger.",
3500 &showlist
, "show ", 0, &cmdlist
);
3501 /* Another way to get at the same thing. */
3502 add_info ("set", show_command
, "Show all GDB settings.");
3504 add_cmd ("commands", no_class
, show_commands
,
3505 "Show the history of commands you typed.\n\
3506 You can supply a command number to start with, or a `+' to start after\n\
3507 the previous command number shown.",
3510 add_cmd ("version", no_class
, show_version
,
3511 "Show what version of GDB this is.", &showlist
);
3513 add_com ("while", class_support
, while_command
,
3514 "Execute nested commands WHILE the conditional expression is non zero.\n\
3515 The conditional expression must follow the word `while' and must in turn be\n\
3516 followed by a new line. The nested commands must be entered one per line,\n\
3517 and should be terminated by the word `end'.");
3519 add_com ("if", class_support
, if_command
,
3520 "Execute nested commands once IF the conditional expression is non zero.\n\
3521 The conditional expression must follow the word `if' and must in turn be\n\
3522 followed by a new line. The nested commands must be entered one per line,\n\
3523 and should be terminated by the word 'else' or `end'. If an else clause\n\
3524 is used, the same rules apply to its nested commands as to the first ones.");
3526 /* If target is open when baud changes, it doesn't take effect until the
3527 next open (I think, not sure). */
3528 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3529 var_zinteger
, (char *)&baud_rate
,
3530 "Set baud rate for remote serial I/O.\n\
3531 This value is used to set the speed of the serial port when debugging\n\
3532 using remote targets.", &setlist
),
3536 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3537 "Set debugging of remote protocol.\n\
3538 When enabled, each packet sent or received with the remote target\n\
3539 is displayed.", &setlist
),