1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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>
50 #include "gdb_string.h"
54 #include <sys/param.h>
58 extern void initialize_targets
PARAMS ((void));
60 extern void initialize_utils
PARAMS ((void));
62 /* Prototypes for local functions */
64 static char * line_completion_function
PARAMS ((char *, int, char *, int));
66 static char * readline_line_completion_function
PARAMS ((char *, int));
68 static void command_loop_marker
PARAMS ((int));
70 static void while_command
PARAMS ((char *, int));
72 static void if_command
PARAMS ((char *, int));
74 static struct command_line
*
75 build_command_line
PARAMS ((enum command_control_type
, char *));
77 static struct command_line
*
78 get_command_line
PARAMS ((enum command_control_type
, char *));
80 static void realloc_body_list
PARAMS ((struct command_line
*, int));
82 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
84 static enum command_control_type
85 recurse_read_control_structure
PARAMS ((struct command_line
*));
87 static struct cleanup
* setup_user_args
PARAMS ((char *));
89 static char * locate_arg
PARAMS ((char *));
91 static char * insert_args
PARAMS ((char *));
93 static void arg_cleanup
PARAMS ((void));
95 static void init_main
PARAMS ((void));
97 static void init_cmd_lists
PARAMS ((void));
99 static void float_handler
PARAMS ((int));
101 static void init_signals
PARAMS ((void));
103 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
105 #ifdef TARGET_BYTE_ORDER_SELECTABLE
107 static void set_endian
PARAMS ((char *, int));
109 static void set_endian_big
PARAMS ((char *, int));
111 static void set_endian_little
PARAMS ((char *, int));
113 static void set_endian_auto
PARAMS ((char *, int));
115 static void show_endian
PARAMS ((char *, int));
119 static void show_history
PARAMS ((char *, int));
121 static void set_history
PARAMS ((char *, int));
123 static void set_history_size_command
PARAMS ((char *, int,
124 struct cmd_list_element
*));
126 static void show_commands
PARAMS ((char *, int));
128 static void echo_command
PARAMS ((char *, int));
130 static void pwd_command
PARAMS ((char *, int));
132 static void show_version
PARAMS ((char *, int));
134 static void document_command
PARAMS ((char *, int));
136 static void define_command
PARAMS ((char *, int));
138 static void validate_comname
PARAMS ((char *));
140 static void help_command
PARAMS ((char *, int));
142 static void show_command
PARAMS ((char *, int));
144 static void info_command
PARAMS ((char *, int));
146 static void complete_command
PARAMS ((char *, int));
148 static void do_nothing
PARAMS ((int));
150 static int quit_cover
PARAMS ((char *));
152 static void disconnect
PARAMS ((int));
154 static void source_cleanup
PARAMS ((FILE *));
156 /* If this definition isn't overridden by the header files, assume
157 that isatty and fileno exist on this system. */
159 #define ISATTY(FP) (isatty (fileno (FP)))
162 /* Initialization file name for gdb. This is overridden in some configs. */
164 #ifndef GDBINIT_FILENAME
165 #define GDBINIT_FILENAME ".gdbinit"
167 char gdbinit
[] = GDBINIT_FILENAME
;
169 int inhibit_gdbinit
= 0;
171 /* If nonzero, and GDB has been configured to be able to use windows,
172 attempt to open them upon startup. */
176 /* Version number of GDB, as a string. */
178 extern char *version
;
180 /* Canonical host name as a string. */
182 extern char *host_name
;
184 /* Canonical target name as a string. */
186 extern char *target_name
;
188 extern char lang_frame_mismatch_warn
[]; /* language.c */
190 /* Flag for whether we want all the "from_tty" gubbish printed. */
192 int caution
= 1; /* Default is yes, sigh. */
194 /* Define all cmd_list_elements. */
196 /* Chain containing all defined commands. */
198 struct cmd_list_element
*cmdlist
;
200 /* Chain containing all defined info subcommands. */
202 struct cmd_list_element
*infolist
;
204 /* Chain containing all defined enable subcommands. */
206 struct cmd_list_element
*enablelist
;
208 /* Chain containing all defined disable subcommands. */
210 struct cmd_list_element
*disablelist
;
212 /* Chain containing all defined delete subcommands. */
214 struct cmd_list_element
*deletelist
;
216 /* Chain containing all defined "enable breakpoint" subcommands. */
218 struct cmd_list_element
*enablebreaklist
;
220 /* Chain containing all defined set subcommands */
222 struct cmd_list_element
*setlist
;
224 /* Chain containing all defined unset subcommands */
226 struct cmd_list_element
*unsetlist
;
228 /* Chain containing all defined show subcommands. */
230 struct cmd_list_element
*showlist
;
232 #ifdef TARGET_BYTE_ORDER_SELECTABLE
233 /* Chain containing the \"set endian\" commands. */
235 struct cmd_list_element
*endianlist
;
238 /* Chain containing all defined \"set history\". */
240 struct cmd_list_element
*sethistlist
;
242 /* Chain containing all defined \"show history\". */
244 struct cmd_list_element
*showhistlist
;
246 /* Chain containing all defined \"unset history\". */
248 struct cmd_list_element
*unsethistlist
;
250 /* Chain containing all defined maintenance subcommands. */
253 struct cmd_list_element
*maintenancelist
;
256 /* Chain containing all defined "maintenance info" subcommands. */
259 struct cmd_list_element
*maintenanceinfolist
;
262 /* Chain containing all defined "maintenance print" subcommands. */
265 struct cmd_list_element
*maintenanceprintlist
;
268 struct cmd_list_element
*setprintlist
;
270 struct cmd_list_element
*showprintlist
;
272 struct cmd_list_element
*setchecklist
;
274 struct cmd_list_element
*showchecklist
;
276 /* stdio stream that command input is being read from. Set to stdin normally.
277 Set by source_command to the file we are sourcing. Set to NULL if we are
278 executing a user-defined command. */
282 /* Current working directory. */
284 char *current_directory
;
286 /* The directory name is actually stored here (usually). */
287 char gdb_dirbuf
[1024];
289 /* Function to call before reading a command, if nonzero.
290 The function receives two args: an input stream,
291 and a prompt string. */
293 void (*window_hook
) PARAMS ((FILE *, char *));
298 /* gdb prints this when reading a command interactively */
301 /* Buffer used for reading command lines, and the size
302 allocated for it so far. */
307 /* Nonzero if the current command is modified by "server ". This
308 affects things like recording into the command history, comamnds
309 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
310 whatever) can issue its own commands and also send along commands
311 from the user, and have the user not notice that the user interface
312 is issuing commands too. */
315 /* Baud rate specified for talking to serial target systems. Default
316 is left as -1, so targets can choose their own defaults. */
317 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
318 or (unsigned int)-1. This is a Bad User Interface. */
322 /* Non-zero tells remote* modules to output debugging info. */
324 int remote_debug
= 0;
326 /* Level of control structure. */
327 static int control_level
;
329 /* Structure for arguments to user defined functions. */
330 #define MAXUSERARGS 10
333 struct user_args
*next
;
342 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
346 #define STOP_SIGNAL SIGTSTP
347 static void stop_sig
PARAMS ((int));
351 /* Some System V have job control but not sigsetmask(). */
352 #if !defined (HAVE_SIGSETMASK)
354 #define HAVE_SIGSETMASK 1
356 #define HAVE_SIGSETMASK 0
360 #if 0 == (HAVE_SIGSETMASK)
361 #define sigsetmask(n)
364 /* Hooks for alternate command interfaces. */
366 /* Called after most modules have been initialized, but before taking users
369 void (*init_ui_hook
) PARAMS ((void));
371 /* Called instead of command_loop at top level. Can be invoked via
372 return_to_top_level. */
374 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 when the target says something to the host, which may
382 want to appear in a different window. */
384 void (*target_output_hook
) PARAMS ((char *));
386 /* Called from print_frame_info to list the line we stopped in. */
388 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
389 int stopline
, int noerror
));
390 /* Replaces most of query. */
392 int (*query_hook
) PARAMS (());
394 /* Called from gdb_flush to flush output. */
396 void (*flush_hook
) PARAMS ((FILE *stream
));
398 /* Called as appropriate to notify the interface of the specified breakpoint
401 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
402 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
403 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
405 /* Called during long calculations to allow GUI to repair window damage, and to
406 check for stop buttons, etc... */
408 void (*interactive_hook
) PARAMS ((void));
410 /* Called when the registers have changed, as a hint to a GUI
411 to minimize window update. */
413 void (*registers_changed_hook
) PARAMS ((void));
415 /* Called when going to wait for the target. Usually allows the GUI to run
416 while waiting for target events. */
418 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
420 /* Used by UI as a wrapper around command execution. May do various things
421 like enabling/disabling buttons, etc... */
423 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
427 /* Takes control from error (). Typically used to prevent longjmps out of the
428 middle of the GUI. Usually used in conjunction with a catch routine. */
430 NORETURN
void (*error_hook
) PARAMS (()) ATTR_NORETURN
;
433 /* Where to go for return_to_top_level (RETURN_ERROR). */
434 jmp_buf error_return
;
435 /* Where to go for return_to_top_level (RETURN_QUIT). */
438 /* Return for reason REASON. This generally gets back to the command
439 loop, but can be caught via catch_errors. */
442 return_to_top_level (reason
)
443 enum return_reason reason
;
448 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
449 I can think of a reason why that is vital, though). */
450 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
452 disable_current_display ();
453 do_cleanups (ALL_CLEANUPS
);
455 if (annotation_level
> 1)
466 (NORETURN
void) longjmp
467 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
470 /* Call FUNC with arg ARGS, catching any errors. If there is no
471 error, return the value returned by FUNC. If there is an error,
472 print ERRSTRING, print the specific error message, then return
475 Must not be called with immediate_quit in effect (bad things might
476 happen, say we got a signal in the middle of a memcpy to quit_return).
477 This is an OK restriction; with very few exceptions immediate_quit can
478 be replaced by judicious use of QUIT.
480 MASK specifies what to catch; it is normally set to
481 RETURN_MASK_ALL, if for no other reason than that the code which
482 calls catch_errors might not be set up to deal with a quit which
483 isn't caught. But if the code can deal with it, it generally
484 should be RETURN_MASK_ERROR, unless for some reason it is more
485 useful to abort only the portion of the operation inside the
486 catch_errors. Note that quit should return to the command line
487 fairly quickly, even if some further processing is being done. */
490 catch_errors (func
, args
, errstring
, mask
)
491 int (*func
) PARAMS ((char *));
500 struct cleanup
*saved_cleanup_chain
;
501 char *saved_error_pre_print
;
502 char *saved_quit_pre_print
;
504 saved_cleanup_chain
= save_cleanups ();
505 saved_error_pre_print
= error_pre_print
;
506 saved_quit_pre_print
= quit_pre_print
;
508 if (mask
& RETURN_MASK_ERROR
)
510 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
511 error_pre_print
= errstring
;
513 if (mask
& RETURN_MASK_QUIT
)
515 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
516 quit_pre_print
= errstring
;
519 if (setjmp (tmp_jmp
) == 0)
521 if (mask
& RETURN_MASK_ERROR
)
522 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
523 if (mask
& RETURN_MASK_QUIT
)
524 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
525 val
= (*func
) (args
);
530 restore_cleanups (saved_cleanup_chain
);
532 if (mask
& RETURN_MASK_ERROR
)
534 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
535 error_pre_print
= saved_error_pre_print
;
537 if (mask
& RETURN_MASK_QUIT
)
539 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
540 quit_pre_print
= saved_quit_pre_print
;
545 /* Handler for SIGHUP. */
551 catch_errors (quit_cover
, NULL
,
552 "Could not kill the program being debugged", RETURN_MASK_ALL
);
553 signal (SIGHUP
, SIG_DFL
);
554 kill (getpid (), SIGHUP
);
557 /* Just a little helper function for disconnect(). */
563 caution
= 0; /* Throw caution to the wind -- we're exiting.
564 This prevents asking the user dumb questions. */
565 quit_command((char *)0, 0);
569 /* Line number we are currently in in a file which is being sourced. */
570 static int source_line_number
;
572 /* Name of the file we are sourcing. */
573 static char *source_file_name
;
575 /* Buffer containing the error_pre_print used by the source stuff.
577 static char *source_error
;
578 static int source_error_allocated
;
580 /* Something to glom on to the start of error_pre_print if source_file_name
582 static char *source_pre_error
;
584 /* Clean up on error during a "source" command (or execution of a
585 user-defined command). */
588 source_cleanup (stream
)
591 /* Restore the previous input stream. */
595 /* Read commands from STREAM. */
597 read_command_file (stream
)
600 struct cleanup
*cleanups
;
602 cleanups
= make_cleanup (source_cleanup
, instream
);
605 do_cleanups (cleanups
);
608 extern void init_proc ();
610 void (*pre_init_ui_hook
) PARAMS ((void));
615 if (pre_init_ui_hook
)
618 /* Run the init function of each source file */
620 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
621 current_directory
= gdb_dirbuf
;
623 init_cmd_lists (); /* This needs to be done first */
624 initialize_targets (); /* Setup target_terminal macros for utils.c */
625 initialize_utils (); /* Make errors and warnings possible */
626 initialize_all_files ();
627 init_main (); /* But that omits this file! Do it now */
632 /* We need a default language for parsing expressions, so simple things like
633 "set width 0" won't fail if no language is explicitly set in a config file
634 or implicitly set by reading an executable during startup. */
635 set_language (language_c
);
636 expected_language
= current_language
; /* don't warn about the change. */
642 /* Allocate, initialize a new command line structure for one of the
643 control commands (if/while). */
645 static struct command_line
*
646 build_command_line (type
, args
)
647 enum command_control_type type
;
650 struct command_line
*cmd
;
653 error ("if/while commands require arguments.\n");
655 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
657 cmd
->control_type
= type
;
661 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
663 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
664 cmd
->line
= savestring (args
, strlen (args
));
668 /* Build and return a new command structure for the control commands
669 such as "if" and "while". */
671 static struct command_line
*
672 get_command_line (type
, arg
)
673 enum command_control_type type
;
676 struct command_line
*cmd
;
677 struct cleanup
*old_chain
= NULL
;
679 /* Allocate and build a new command line structure. */
680 cmd
= build_command_line (type
, arg
);
682 old_chain
= make_cleanup (free_command_lines
, &cmd
);
684 /* Read in the body of this command. */
685 if (recurse_read_control_structure (cmd
) == invalid_control
)
687 warning ("error reading in control structure\n");
688 do_cleanups (old_chain
);
692 discard_cleanups (old_chain
);
696 /* Recursively print a command (including full control structures). */
698 print_command_line (cmd
, depth
)
699 struct command_line
*cmd
;
706 for (i
= 0; i
< depth
; i
++)
707 fputs_filtered (" ", gdb_stdout
);
710 /* A simple command, print it and return. */
711 if (cmd
->control_type
== simple_control
)
713 fputs_filtered (cmd
->line
, gdb_stdout
);
714 fputs_filtered ("\n", gdb_stdout
);
718 /* loop_continue to jump to the start of a while loop, print it
720 if (cmd
->control_type
== continue_control
)
722 fputs_filtered ("loop_continue\n", gdb_stdout
);
726 /* loop_break to break out of a while loop, print it and return. */
727 if (cmd
->control_type
== break_control
)
729 fputs_filtered ("loop_break\n", gdb_stdout
);
733 /* A while command. Recursively print its subcommands before returning. */
734 if (cmd
->control_type
== while_control
)
736 struct command_line
*list
;
737 fputs_filtered ("while ", gdb_stdout
);
738 fputs_filtered (cmd
->line
, gdb_stdout
);
739 fputs_filtered ("\n", gdb_stdout
);
740 list
= *cmd
->body_list
;
743 print_command_line (list
, depth
+ 1);
748 /* An if command. Recursively print both arms before returning. */
749 if (cmd
->control_type
== if_control
)
751 fputs_filtered ("if ", gdb_stdout
);
752 fputs_filtered (cmd
->line
, gdb_stdout
);
753 fputs_filtered ("\n", gdb_stdout
);
755 print_command_line (cmd
->body_list
[0], depth
+ 1);
757 /* Show the false arm if it exists. */
758 if (cmd
->body_count
== 2)
762 for (i
= 0; i
< depth
; i
++)
763 fputs_filtered (" ", gdb_stdout
);
765 fputs_filtered ("else\n", gdb_stdout
);
766 print_command_line (cmd
->body_list
[1], depth
+ 1);
770 for (i
= 0; i
< depth
; i
++)
771 fputs_filtered (" ", gdb_stdout
);
773 fputs_filtered ("end\n", gdb_stdout
);
777 /* Execute the command in CMD. */
779 enum command_control_type
780 execute_control_command (cmd
)
781 struct command_line
*cmd
;
783 struct expression
*expr
;
784 struct command_line
*current
;
785 struct cleanup
*old_chain
= 0;
788 enum command_control_type ret
;
791 switch (cmd
->control_type
)
794 /* A simple command, execute it and return. */
795 new_line
= insert_args (cmd
->line
);
797 return invalid_control
;
798 old_chain
= make_cleanup (free_current_contents
, &new_line
);
799 execute_command (new_line
, 0);
800 ret
= cmd
->control_type
;
803 case continue_control
:
805 /* Return for "continue", and "break" so we can either
806 continue the loop at the top, or break out. */
807 ret
= cmd
->control_type
;
812 /* Parse the loop control expression for the while statement. */
813 new_line
= insert_args (cmd
->line
);
815 return invalid_control
;
816 old_chain
= make_cleanup (free_current_contents
, &new_line
);
817 expr
= parse_expression (new_line
);
818 make_cleanup (free_current_contents
, &expr
);
820 ret
= simple_control
;
823 /* Keep iterating so long as the expression is true. */
826 /* Evaluate the expression. */
827 val
= evaluate_expression (expr
);
829 /* If the value is false, then break out of the loop. */
830 if (!value_true (val
))
833 /* Execute the body of the while statement. */
834 current
= *cmd
->body_list
;
837 ret
= execute_control_command (current
);
839 /* If we got an error, or a "break" command, then stop
841 if (ret
== invalid_control
|| ret
== break_control
)
847 /* If we got a "continue" command, then restart the loop
849 if (ret
== continue_control
)
852 /* Get the next statement. */
853 current
= current
->next
;
857 /* Reset RET so that we don't recurse the break all the way down. */
858 if (ret
== break_control
)
859 ret
= simple_control
;
866 new_line
= insert_args (cmd
->line
);
868 return invalid_control
;
869 old_chain
= make_cleanup (free_current_contents
, &new_line
);
870 /* Parse the conditional for the if statement. */
871 expr
= parse_expression (new_line
);
872 make_cleanup (free_current_contents
, &expr
);
875 ret
= simple_control
;
877 /* Evaluate the conditional. */
878 val
= evaluate_expression (expr
);
880 /* Choose which arm to take commands from based on the value of the
881 conditional expression. */
882 if (value_true (val
))
883 current
= *cmd
->body_list
;
884 else if (cmd
->body_count
== 2)
885 current
= *(cmd
->body_list
+ 1);
887 /* Execute commands in the given arm. */
890 ret
= execute_control_command (current
);
892 /* If we got an error, get out. */
893 if (ret
!= simple_control
)
896 /* Get the next statement in the body. */
897 current
= current
->next
;
904 warning ("Invalid control type in command structure.");
905 return invalid_control
;
909 do_cleanups (old_chain
);
914 /* "while" command support. Executes a body of statements while the
915 loop condition is nonzero. */
918 while_command (arg
, from_tty
)
922 struct command_line
*command
= NULL
;
925 command
= get_command_line (while_control
, arg
);
930 execute_control_command (command
);
931 free_command_lines (&command
);
934 /* "if" command support. Execute either the true or false arm depending
935 on the value of the if conditional. */
938 if_command (arg
, from_tty
)
942 struct command_line
*command
= NULL
;
945 command
= get_command_line (if_control
, arg
);
950 execute_control_command (command
);
951 free_command_lines (&command
);
958 struct user_args
*oargs
= user_args
;
960 fatal ("Internal error, arg_cleanup called with no user args.\n");
962 user_args
= user_args
->next
;
966 /* Bind the incomming arguments for a user defined command to
967 $arg0, $arg1 ... $argMAXUSERARGS. */
969 static struct cleanup
*
973 struct user_args
*args
;
974 struct cleanup
*old_chain
;
975 unsigned int arg_count
= 0;
977 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
978 memset (args
, 0, sizeof (struct user_args
));
980 args
->next
= user_args
;
983 old_chain
= make_cleanup (arg_cleanup
, 0);
992 if (arg_count
>= MAXUSERARGS
)
994 error ("user defined function may only have %d arguments.\n",
999 /* Strip whitespace. */
1000 while (*p
== ' ' || *p
== '\t')
1003 /* P now points to an argument. */
1005 user_args
->a
[arg_count
].arg
= p
;
1007 /* Get to the end of this argument. */
1008 while (*p
&& *p
!= ' ' && *p
!= '\t')
1011 user_args
->a
[arg_count
].len
= p
- start_arg
;
1018 /* Given character string P, return a point to the first argument ($arg),
1019 or NULL if P contains no arguments. */
1025 while ((p
= strchr (p
, '$')))
1027 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1034 /* Insert the user defined arguments stored in user_arg into the $arg
1035 arguments found in line, with the updated copy being placed into nline. */
1041 char *p
, *save_line
, *new_line
;
1044 /* First we need to know how much memory to allocate for the new line. */
1047 while ((p
= locate_arg (line
)))
1052 if (i
>= user_args
->count
)
1054 error ("Missing argument %d in user function.\n", i
);
1057 len
+= user_args
->a
[i
].len
;
1061 /* Don't forget the tail. */
1062 len
+= strlen (line
);
1064 /* Allocate space for the new line and fill it in. */
1065 new_line
= (char *)xmalloc (len
+ 1);
1066 if (new_line
== NULL
)
1069 /* Restore pointer to beginning of old line. */
1072 /* Save pointer to beginning of new line. */
1073 save_line
= new_line
;
1075 while ((p
= locate_arg (line
)))
1079 memcpy (new_line
, line
, p
- line
);
1080 new_line
+= p
- line
;
1083 len
= user_args
->a
[i
].len
;
1086 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1091 /* Don't forget the tail. */
1092 strcpy (new_line
, line
);
1094 /* Return a pointer to the beginning of the new line. */
1099 execute_user_command (c
, args
)
1100 struct cmd_list_element
*c
;
1103 register struct command_line
*cmdlines
;
1104 struct cleanup
*old_chain
;
1105 enum command_control_type ret
;
1107 old_chain
= setup_user_args (args
);
1109 cmdlines
= c
->user_commands
;
1114 /* Set the instream to 0, indicating execution of a
1115 user-defined function. */
1116 old_chain
= make_cleanup (source_cleanup
, instream
);
1117 instream
= (FILE *) 0;
1120 ret
= execute_control_command (cmdlines
);
1121 if (ret
!= simple_control
&& ret
!= break_control
)
1123 warning ("Error in control structure.\n");
1126 cmdlines
= cmdlines
->next
;
1128 do_cleanups (old_chain
);
1131 /* Execute the line P as a command.
1132 Pass FROM_TTY as second argument to the defining function. */
1135 execute_command (p
, from_tty
)
1139 register struct cmd_list_element
*c
;
1140 register enum language flang
;
1141 static int warned
= 0;
1142 extern FILE *serial_logfp
;
1146 /* This can happen when command_line_input hits end of file. */
1150 if (serial_logfp
!= NULL
)
1151 serial_log_command (p
);
1153 while (*p
== ' ' || *p
== '\t') p
++;
1158 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1159 /* Pass null arg rather than an empty one. */
1162 /* Clear off trailing whitespace, except for set and complete command. */
1163 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1165 p
= arg
+ strlen (arg
) - 1;
1166 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1171 /* If this command has been hooked, run the hook first. */
1173 execute_user_command (c
->hook
, (char *)0);
1175 if (c
->class == class_user
)
1176 execute_user_command (c
, arg
);
1177 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1178 do_setshow_command (arg
, from_tty
& caution
, c
);
1179 else if (c
->function
.cfunc
== NO_FUNCTION
)
1180 error ("That is not a command, just a help topic.");
1181 else if (call_command_hook
)
1182 call_command_hook (c
, arg
, from_tty
& caution
);
1184 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1187 /* Tell the user if the language has changed (except first time). */
1188 if (current_language
!= expected_language
)
1190 if (language_mode
== language_mode_auto
) {
1191 language_info (1); /* Print what changed. */
1196 /* Warn the user if the working language does not match the
1197 language of the current frame. Only warn the user if we are
1198 actually running the program, i.e. there is a stack. */
1199 /* FIXME: This should be cacheing the frame and only running when
1200 the frame changes. */
1202 if (target_has_stack
)
1204 flang
= get_frame_language ();
1206 && flang
!= language_unknown
1207 && flang
!= current_language
->la_language
)
1209 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1217 command_loop_marker (foo
)
1222 /* Read commands from `instream' and execute them
1223 until end of file or error reading instream. */
1228 struct cleanup
*old_chain
;
1230 int stdin_is_tty
= ISATTY (stdin
);
1231 long time_at_cmd_start
;
1233 long space_at_cmd_start
;
1235 extern int display_time
;
1236 extern int display_space
;
1238 while (!feof (instream
))
1240 if (window_hook
&& instream
== stdin
)
1241 (*window_hook
) (instream
, prompt
);
1244 if (instream
== stdin
&& stdin_is_tty
)
1245 reinitialize_more_filter ();
1246 old_chain
= make_cleanup (command_loop_marker
, 0);
1247 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1248 instream
== stdin
, "prompt");
1252 time_at_cmd_start
= get_run_time ();
1257 extern char **environ
;
1258 char *lim
= (char *) sbrk (0);
1260 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1264 execute_command (command
, instream
== stdin
);
1265 /* Do any commands attached to breakpoint we stopped at. */
1266 bpstat_do_actions (&stop_bpstat
);
1267 do_cleanups (old_chain
);
1271 long cmd_time
= get_run_time () - time_at_cmd_start
;
1273 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1274 cmd_time
/ 1000000, cmd_time
% 1000000);
1280 extern char **environ
;
1281 char *lim
= (char *) sbrk (0);
1282 long space_now
= lim
- (char *) &environ
;
1283 long space_diff
= space_now
- space_at_cmd_start
;
1285 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1287 (space_diff
>= 0 ? '+' : '-'),
1294 /* Commands call this if they do not want to be repeated by null lines. */
1302 /* If we aren't reading from standard input, we are saving the last
1303 thing read from stdin in line and don't want to delete it. Null lines
1304 won't repeat here in any case. */
1305 if (instream
== stdin
)
1309 /* Read a line from the stream "instream" without command line editing.
1311 It prints PRROMPT once at the start.
1312 Action is compatible with "readline", e.g. space for the result is
1313 malloc'd and should be freed by the caller.
1315 A NULL return means end of file. */
1317 gdb_readline (prrompt
)
1322 int input_index
= 0;
1323 int result_size
= 80;
1327 /* Don't use a _filtered function here. It causes the assumed
1328 character position to be off, since the newline we read from
1329 the user is not accounted for. */
1330 fputs_unfiltered (prrompt
, gdb_stdout
);
1332 /* Move to a new line so the entered line doesn't have a prompt
1333 on the front of it. */
1334 fputs_unfiltered ("\n", gdb_stdout
);
1336 gdb_flush (gdb_stdout
);
1339 result
= (char *) xmalloc (result_size
);
1343 /* Read from stdin if we are executing a user defined command.
1344 This is the right thing for prompt_for_continue, at least. */
1345 c
= fgetc (instream
? instream
: stdin
);
1349 if (input_index
> 0)
1350 /* The last line does not end with a newline. Return it, and
1351 if we are called again fgetc will still return EOF and
1352 we'll return NULL then. */
1361 result
[input_index
++] = c
;
1362 while (input_index
>= result_size
)
1365 result
= (char *) xrealloc (result
, result_size
);
1369 result
[input_index
++] = '\0';
1373 /* Variables which control command line editing and history
1374 substitution. These variables are given default values at the end
1376 static int command_editing_p
;
1377 static int history_expansion_p
;
1378 static int write_history_p
;
1379 static int history_size
;
1380 static char *history_filename
;
1382 /* readline uses the word breaks for two things:
1383 (1) In figuring out where to point the TEXT parameter to the
1384 rl_completion_entry_function. Since we don't use TEXT for much,
1385 it doesn't matter a lot what the word breaks are for this purpose, but
1386 it does affect how much stuff M-? lists.
1387 (2) If one of the matches contains a word break character, readline
1388 will quote it. That's why we switch between
1389 gdb_completer_word_break_characters and
1390 gdb_completer_command_word_break_characters. I'm not sure when
1391 we need this behavior (perhaps for funky characters in C++ symbols?). */
1393 /* Variables which are necessary for fancy command line editing. */
1394 char *gdb_completer_word_break_characters
=
1395 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1397 /* When completing on command names, we remove '-' from the list of
1398 word break characters, since we use it in command names. If the
1399 readline library sees one in any of the current completion strings,
1400 it thinks that the string needs to be quoted and automatically supplies
1402 char *gdb_completer_command_word_break_characters
=
1403 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1405 /* Characters that can be used to quote completion strings. Note that we
1406 can't include '"' because the gdb C parser treats such quoted sequences
1408 char *gdb_completer_quote_characters
=
1411 /* Functions that are used as part of the fancy command line editing. */
1413 /* This can be used for functions which don't want to complete on symbols
1414 but don't want to complete on anything else either. */
1417 noop_completer (text
, prefix
)
1424 /* Complete on filenames. */
1426 filename_completer (text
, word
)
1430 /* From readline. */
1431 extern char *filename_completion_function ();
1432 int subsequent_name
;
1434 int return_val_used
;
1435 int return_val_alloced
;
1437 return_val_used
= 0;
1438 /* Small for testing. */
1439 return_val_alloced
= 1;
1440 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1442 subsequent_name
= 0;
1446 p
= filename_completion_function (text
, subsequent_name
);
1447 if (return_val_used
>= return_val_alloced
)
1449 return_val_alloced
*= 2;
1451 (char **) xrealloc (return_val
,
1452 return_val_alloced
* sizeof (char *));
1456 return_val
[return_val_used
++] = p
;
1459 /* Like emacs, don't complete on old versions. Especially useful
1460 in the "source" command. */
1461 if (p
[strlen (p
) - 1] == '~')
1467 /* Return exactly p. */
1468 return_val
[return_val_used
++] = p
;
1469 else if (word
> text
)
1471 /* Return some portion of p. */
1472 q
= xmalloc (strlen (p
) + 5);
1473 strcpy (q
, p
+ (word
- text
));
1474 return_val
[return_val_used
++] = q
;
1479 /* Return some of TEXT plus p. */
1480 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1481 strncpy (q
, word
, text
- word
);
1482 q
[text
- word
] = '\0';
1484 return_val
[return_val_used
++] = q
;
1488 subsequent_name
= 1;
1491 /* There is no way to do this just long enough to affect quote inserting
1492 without also affecting the next completion. This should be fixed in
1494 /* Insure that readline does the right thing
1495 with respect to inserting quotes. */
1496 rl_completer_word_break_characters
= "";
1501 /* Here are some useful test cases for completion. FIXME: These should
1502 be put in the test suite. They should be tested with both M-? and TAB.
1504 "show output-" "radix"
1505 "show output" "-radix"
1506 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1507 "p " ambiguous (all symbols)
1508 "info t foo" no completions
1509 "info t " no completions
1510 "info t" ambiguous ("info target", "info terminal", etc.)
1511 "info ajksdlfk" no completions
1512 "info ajksdlfk " no completions
1514 "info " ambiguous (all info commands)
1515 "p \"a" no completions (string constant)
1516 "p 'a" ambiguous (all symbols starting with a)
1517 "p b-a" ambiguous (all symbols starting with a)
1518 "p b-" ambiguous (all symbols)
1519 "file Make" "file" (word break hard to screw up here)
1520 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1523 /* Generate completions one by one for the completer. Each time we are
1524 called return another potential completion to the caller.
1525 line_completion just completes on commands or passes the buck to the
1526 command's completer function, the stuff specific to symbol completion
1527 is in make_symbol_completion_list.
1529 TEXT is the caller's idea of the "word" we are looking at.
1531 MATCHES is the number of matches that have currently been collected from
1532 calling this completion function. When zero, then we need to initialize,
1533 otherwise the initialization has already taken place and we can just
1534 return the next potential completion string.
1536 LINE_BUFFER is available to be looked at; it contains the entire text
1537 of the line. POINT is the offset in that line of the cursor. You
1538 should pretend that the line ends at POINT.
1540 Returns NULL if there are no more completions, else a pointer to a string
1541 which is a possible completion, it is the caller's responsibility to
1545 line_completion_function (text
, matches
, line_buffer
, point
)
1551 static char **list
= (char **)NULL
; /* Cache of completions */
1552 static int index
; /* Next cached completion */
1553 char *output
= NULL
;
1554 char *tmp_command
, *p
;
1555 /* Pointer within tmp_command which corresponds to text. */
1557 struct cmd_list_element
*c
, *result_list
;
1561 /* The caller is beginning to accumulate a new set of completions, so
1562 we need to find all of them now, and cache them for returning one at
1563 a time on future calls. */
1567 /* Free the storage used by LIST, but not by the strings inside.
1568 This is because rl_complete_internal () frees the strings. */
1574 /* Choose the default set of word break characters to break completions.
1575 If we later find out that we are doing completions on command strings
1576 (as opposed to strings supplied by the individual command completer
1577 functions, which can be any string) then we will switch to the
1578 special word break set for command strings, which leaves out the
1579 '-' character used in some commands. */
1581 rl_completer_word_break_characters
=
1582 gdb_completer_word_break_characters
;
1584 /* Decide whether to complete on a list of gdb commands or on symbols. */
1585 tmp_command
= (char *) alloca (point
+ 1);
1588 strncpy (tmp_command
, line_buffer
, point
);
1589 tmp_command
[point
] = '\0';
1590 /* Since text always contains some number of characters leading up
1591 to point, we can find the equivalent position in tmp_command
1592 by subtracting that many characters from the end of tmp_command. */
1593 word
= tmp_command
+ point
- strlen (text
);
1597 /* An empty line we want to consider ambiguous; that is, it
1598 could be any command. */
1599 c
= (struct cmd_list_element
*) -1;
1604 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1607 /* Move p up to the next interesting thing. */
1608 while (*p
== ' ' || *p
== '\t')
1615 /* It is an unrecognized command. So there are no
1616 possible completions. */
1619 else if (c
== (struct cmd_list_element
*) -1)
1623 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1624 doesn't advance over that thing itself. Do so now. */
1626 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1628 if (q
!= tmp_command
+ point
)
1630 /* There is something beyond the ambiguous
1631 command, so there are no possible completions. For
1632 example, "info t " or "info t foo" does not complete
1633 to anything, because "info t" can be "info target" or
1639 /* We're trying to complete on the command which was ambiguous.
1640 This we can deal with. */
1643 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1648 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1650 /* Insure that readline does the right thing with respect to
1651 inserting quotes. */
1652 rl_completer_word_break_characters
=
1653 gdb_completer_command_word_break_characters
;
1658 /* We've recognized a full command. */
1660 if (p
== tmp_command
+ point
)
1662 /* There is no non-whitespace in the line beyond the command. */
1664 if (p
[-1] == ' ' || p
[-1] == '\t')
1666 /* The command is followed by whitespace; we need to complete
1667 on whatever comes after command. */
1670 /* It is a prefix command; what comes after it is
1671 a subcommand (e.g. "info "). */
1672 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1674 /* Insure that readline does the right thing
1675 with respect to inserting quotes. */
1676 rl_completer_word_break_characters
=
1677 gdb_completer_command_word_break_characters
;
1681 list
= complete_on_enum (c
->enums
, p
, word
);
1682 rl_completer_word_break_characters
=
1683 gdb_completer_command_word_break_characters
;
1687 /* It is a normal command; what comes after it is
1688 completed by the command's completer function. */
1689 list
= (*c
->completer
) (p
, word
);
1694 /* The command is not followed by whitespace; we need to
1695 complete on the command itself. e.g. "p" which is a
1696 command itself but also can complete to "print", "ptype"
1700 /* Find the command we are completing on. */
1702 while (q
> tmp_command
)
1704 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1710 list
= complete_on_cmdlist (result_list
, q
, word
);
1712 /* Insure that readline does the right thing
1713 with respect to inserting quotes. */
1714 rl_completer_word_break_characters
=
1715 gdb_completer_command_word_break_characters
;
1720 /* There is non-whitespace beyond the command. */
1722 if (c
->prefixlist
&& !c
->allow_unknown
)
1724 /* It is an unrecognized subcommand of a prefix command,
1725 e.g. "info adsfkdj". */
1730 list
= complete_on_enum (c
->enums
, p
, word
);
1734 /* It is a normal command. */
1735 list
= (*c
->completer
) (p
, word
);
1741 /* If we found a list of potential completions during initialization then
1742 dole them out one at a time. The vector of completions is NULL
1743 terminated, so after returning the last one, return NULL (and continue
1744 to do so) each time we are called after that, until a new list is
1749 output
= list
[index
];
1757 /* Can't do this because readline hasn't yet checked the word breaks
1758 for figuring out whether to insert a quote. */
1760 /* Make sure the word break characters are set back to normal for the
1761 next time that readline tries to complete something. */
1762 rl_completer_word_break_characters
=
1763 gdb_completer_word_break_characters
;
1769 /* Line completion interface function for readline. */
1772 readline_line_completion_function (text
, matches
)
1776 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1779 /* Skip over a possibly quoted word (as defined by the quote characters
1780 and word break characters the completer uses). Returns pointer to the
1781 location after the "word". */
1787 char quote_char
= '\0';
1790 for (scan
= str
; *scan
!= '\0'; scan
++)
1792 if (quote_char
!= '\0')
1794 /* Ignore everything until the matching close quote char */
1795 if (*scan
== quote_char
)
1797 /* Found matching close quote. */
1802 else if (strchr (gdb_completer_quote_characters
, *scan
))
1804 /* Found start of a quoted string. */
1807 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1821 #if STOP_SIGNAL == SIGTSTP
1822 signal (SIGTSTP
, SIG_DFL
);
1824 kill (getpid (), SIGTSTP
);
1825 signal (SIGTSTP
, stop_sig
);
1827 signal (STOP_SIGNAL
, stop_sig
);
1829 printf_unfiltered ("%s", prompt
);
1830 gdb_flush (gdb_stdout
);
1832 /* Forget about any previous command -- null line now will do nothing. */
1835 #endif /* STOP_SIGNAL */
1837 /* Initialize signal handlers. */
1847 signal (SIGINT
, request_quit
);
1849 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1850 to the inferior and breakpoints will be ignored. */
1852 signal (SIGTRAP
, SIG_DFL
);
1855 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1856 passed to the inferior, which we don't want. It would be
1857 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1858 on BSD4.3 systems using vfork, that can affect the
1859 GDB process as well as the inferior (the signal handling tables
1860 might be in memory, shared between the two). Since we establish
1861 a handler for SIGQUIT, when we call exec it will set the signal
1862 to SIG_DFL for us. */
1863 signal (SIGQUIT
, do_nothing
);
1864 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1865 signal (SIGHUP
, disconnect
);
1866 signal (SIGFPE
, float_handler
);
1868 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1869 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1873 /* Read one line from the command input stream `instream'
1874 into the local static buffer `linebuffer' (whose current length
1876 The buffer is made bigger as necessary.
1877 Returns the address of the start of the line.
1879 NULL is returned for end of file.
1881 *If* the instream == stdin & stdin is a terminal, the line read
1882 is copied into the file line saver (global var char *line,
1883 length linesize) so that it can be duplicated.
1885 This routine either uses fancy command line editing or
1886 simple input as the user has requested. */
1889 command_line_input (prrompt
, repeat
, annotation_suffix
)
1892 char *annotation_suffix
;
1894 static char *linebuffer
= 0;
1895 static unsigned linelength
= 0;
1899 char *local_prompt
= prrompt
;
1903 /* The annotation suffix must be non-NULL. */
1904 if (annotation_suffix
== NULL
)
1905 annotation_suffix
= "";
1907 if (annotation_level
> 1 && instream
== stdin
)
1909 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1910 + strlen (annotation_suffix
) + 40);
1911 if (prrompt
== NULL
)
1912 local_prompt
[0] = '\0';
1914 strcpy (local_prompt
, prrompt
);
1915 strcat (local_prompt
, "\n\032\032");
1916 strcat (local_prompt
, annotation_suffix
);
1917 strcat (local_prompt
, "\n");
1920 if (linebuffer
== 0)
1923 linebuffer
= (char *) xmalloc (linelength
);
1928 /* Control-C quits instantly if typed while in this loop
1929 since it should not wait until the user types a newline. */
1933 signal (STOP_SIGNAL
, stop_sig
);
1938 /* Make sure that all output has been output. Some machines may let
1939 you get away with leaving out some of the gdb_flush, but not all. */
1941 gdb_flush (gdb_stdout
);
1942 gdb_flush (gdb_stderr
);
1944 if (source_file_name
!= NULL
)
1946 ++source_line_number
;
1947 sprintf (source_error
,
1948 "%s%s:%d: Error in sourced command file:\n",
1951 source_line_number
);
1952 error_pre_print
= source_error
;
1955 if (annotation_level
> 1 && instream
== stdin
)
1957 printf_unfiltered ("\n\032\032pre-");
1958 printf_unfiltered (annotation_suffix
);
1959 printf_unfiltered ("\n");
1962 /* Don't use fancy stuff if not talking to stdin. */
1963 if (command_editing_p
&& instream
== stdin
1964 && ISATTY (instream
))
1965 rl
= readline (local_prompt
);
1967 rl
= gdb_readline (local_prompt
);
1969 if (annotation_level
> 1 && instream
== stdin
)
1971 printf_unfiltered ("\n\032\032post-");
1972 printf_unfiltered (annotation_suffix
);
1973 printf_unfiltered ("\n");
1976 if (!rl
|| rl
== (char *) EOF
)
1981 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1983 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1984 nline
= (char *) xrealloc (linebuffer
, linelength
);
1985 p
+= nline
- linebuffer
;
1989 /* Copy line. Don't copy null at end. (Leaves line alone
1990 if this was just a newline) */
1994 free (rl
); /* Allocated in readline. */
1996 if (p
== linebuffer
|| *(p
- 1) != '\\')
1999 p
--; /* Put on top of '\'. */
2000 local_prompt
= (char *) 0;
2005 signal (STOP_SIGNAL
, SIG_DFL
);
2012 #define SERVER_COMMAND_LENGTH 7
2014 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2015 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2018 /* Note that we don't set `line'. Between this and the check in
2019 dont_repeat, this insures that repeating will still do the
2022 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2025 /* Do history expansion if that is wished. */
2026 if (history_expansion_p
&& instream
== stdin
2027 && ISATTY (instream
))
2029 char *history_value
;
2032 *p
= '\0'; /* Insert null now. */
2033 expanded
= history_expand (linebuffer
, &history_value
);
2036 /* Print the changes. */
2037 printf_unfiltered ("%s\n", history_value
);
2039 /* If there was an error, call this function again. */
2042 free (history_value
);
2043 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2045 if (strlen (history_value
) > linelength
)
2047 linelength
= strlen (history_value
) + 1;
2048 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2050 strcpy (linebuffer
, history_value
);
2051 p
= linebuffer
+ strlen(linebuffer
);
2052 free (history_value
);
2056 /* If we just got an empty line, and that is supposed
2057 to repeat the previous command, return the value in the
2059 if (repeat
&& p
== linebuffer
)
2061 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2067 /* Add line to history if appropriate. */
2068 if (instream
== stdin
2069 && ISATTY (stdin
) && *linebuffer
)
2070 add_history (linebuffer
);
2072 /* Note: lines consisting solely of comments are added to the command
2073 history. This is useful when you type a command, and then
2074 realize you don't want to execute it quite yet. You can comment
2075 out the command and then later fetch it from the value history
2076 and remove the '#'. The kill ring is probably better, but some
2077 people are in the habit of commenting things out. */
2079 *p1
= '\0'; /* Found a comment. */
2081 /* Save into global buffer if appropriate. */
2084 if (linelength
> linesize
)
2086 line
= xrealloc (line
, linelength
);
2087 linesize
= linelength
;
2089 strcpy (line
, linebuffer
);
2097 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2098 code bodies. This is typically used when we encounter an "else"
2099 clause for an "if" command. */
2102 realloc_body_list (command
, new_length
)
2103 struct command_line
*command
;
2107 struct command_line
**body_list
;
2109 n
= command
->body_count
;
2111 /* Nothing to do? */
2112 if (new_length
<= n
)
2115 body_list
= (struct command_line
**)
2116 xmalloc (sizeof (struct command_line
*) * new_length
);
2118 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2120 free (command
->body_list
);
2121 command
->body_list
= body_list
;
2122 command
->body_count
= new_length
;
2125 /* Read one line from the input stream. If the command is an "else" or
2126 "end", return such an indication to the caller. */
2128 static enum misc_command_type
2129 read_next_line (command
)
2130 struct command_line
**command
;
2132 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2135 if (control_level
>= 254)
2136 error ("Control nesting too deep!\n");
2138 /* Set a prompt based on the nesting of the control commands. */
2139 if (instream
== stdin
)
2141 for (i
= 0; i
< control_level
; i
++)
2142 control_prompt
[i
] = ' ';
2143 control_prompt
[i
] = '>';
2144 control_prompt
[i
+1] = '\0';
2145 prompt_ptr
= (char *)&control_prompt
[0];
2150 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2152 /* Not sure what to do here. */
2156 /* Strip leading and trailing whitespace. */
2157 while (*p
== ' ' || *p
== '\t')
2160 p1
= p
+ strlen (p
);
2161 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2164 /* Blanks and comments don't really do anything, but we need to
2165 distinguish them from else, end and other commands which can be
2167 if (p1
== p
|| p
[0] == '#')
2170 /* Is this the end of a simple, while, or if control structure? */
2171 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2174 /* Is the else clause of an if control structure? */
2175 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2176 return else_command
;
2178 /* Check for while, if, break, continue, etc and build a new command
2179 line structure for them. */
2180 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2181 *command
= build_command_line (while_control
, p
+ 6);
2182 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2183 *command
= build_command_line (if_control
, p
+ 3);
2184 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2186 *command
= (struct command_line
*)
2187 xmalloc (sizeof (struct command_line
));
2188 (*command
)->next
= NULL
;
2189 (*command
)->line
= NULL
;
2190 (*command
)->control_type
= break_control
;
2191 (*command
)->body_count
= 0;
2192 (*command
)->body_list
= NULL
;
2194 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2196 *command
= (struct command_line
*)
2197 xmalloc (sizeof (struct command_line
));
2198 (*command
)->next
= NULL
;
2199 (*command
)->line
= NULL
;
2200 (*command
)->control_type
= continue_control
;
2201 (*command
)->body_count
= 0;
2202 (*command
)->body_list
= NULL
;
2206 /* A normal command. */
2207 *command
= (struct command_line
*)
2208 xmalloc (sizeof (struct command_line
));
2209 (*command
)->next
= NULL
;
2210 (*command
)->line
= savestring (p
, p1
- p
);
2211 (*command
)->control_type
= simple_control
;
2212 (*command
)->body_count
= 0;
2213 (*command
)->body_list
= NULL
;
2216 /* Nothing special. */
2220 /* Recursively read in the control structures and create a command_line
2223 The parent_control parameter is the control structure in which the
2224 following commands are nested. */
2226 static enum command_control_type
2227 recurse_read_control_structure (current_cmd
)
2228 struct command_line
*current_cmd
;
2230 int current_body
, i
;
2231 enum misc_command_type val
;
2232 enum command_control_type ret
;
2233 struct command_line
**body_ptr
, *child_tail
, *next
;
2238 /* Sanity checks. */
2239 if (current_cmd
->control_type
== simple_control
)
2241 error ("Recursed on a simple control type\n");
2242 return invalid_control
;
2245 if (current_body
> current_cmd
->body_count
)
2247 error ("Allocated body is smaller than this command type needs\n");
2248 return invalid_control
;
2251 /* Read lines from the input stream and build control structures. */
2257 val
= read_next_line (&next
);
2259 /* Just skip blanks and comments. */
2260 if (val
== nop_command
)
2263 if (val
== end_command
)
2265 if (current_cmd
->control_type
== while_control
2266 || current_cmd
->control_type
== if_control
)
2268 /* Success reading an entire control structure. */
2269 ret
= simple_control
;
2274 ret
= invalid_control
;
2279 /* Not the end of a control structure. */
2280 if (val
== else_command
)
2282 if (current_cmd
->control_type
== if_control
2283 && current_body
== 1)
2285 realloc_body_list (current_cmd
, 2);
2292 ret
= invalid_control
;
2299 child_tail
->next
= next
;
2303 body_ptr
= current_cmd
->body_list
;
2304 for (i
= 1; i
< current_body
; i
++)
2313 /* If the latest line is another control structure, then recurse
2315 if (next
->control_type
== while_control
2316 || next
->control_type
== if_control
)
2319 ret
= recurse_read_control_structure (next
);
2322 if (ret
!= simple_control
)
2333 /* Read lines from the input stream
2334 and accumulate them in a chain of struct command_line's
2335 which is then returned. */
2337 struct command_line
*
2338 read_command_lines ()
2340 struct command_line
*head
, *tail
, *next
;
2341 struct cleanup
*old_chain
;
2342 enum command_control_type ret
;
2343 enum misc_command_type val
;
2350 val
= read_next_line (&next
);
2352 /* Ignore blank lines or comments. */
2353 if (val
== nop_command
)
2356 if (val
== end_command
)
2358 ret
= simple_control
;
2362 if (val
!= ok_command
)
2364 ret
= invalid_control
;
2368 if (next
->control_type
== while_control
2369 || next
->control_type
== if_control
)
2372 ret
= recurse_read_control_structure (next
);
2375 if (ret
== invalid_control
)
2386 old_chain
= make_cleanup (free_command_lines
, &head
);
2395 if (ret
!= invalid_control
)
2397 discard_cleanups (old_chain
);
2401 do_cleanups (old_chain
);
2407 /* Free a chain of struct command_line's. */
2410 free_command_lines (lptr
)
2411 struct command_line
**lptr
;
2413 register struct command_line
*l
= *lptr
;
2414 register struct command_line
*next
;
2415 struct command_line
**blist
;
2420 if (l
->body_count
> 0)
2422 blist
= l
->body_list
;
2423 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2424 free_command_lines (blist
);
2433 /* Add an element to the list of info subcommands. */
2436 add_info (name
, fun
, doc
)
2438 void (*fun
) PARAMS ((char *, int));
2441 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2444 /* Add an alias to the list of info subcommands. */
2447 add_info_alias (name
, oldname
, abbrev_flag
)
2452 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2455 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2456 Therefore, its own definition is called only for "info" with no args. */
2460 info_command (arg
, from_tty
)
2464 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2465 help_list (infolist
, "info ", -1, gdb_stdout
);
2468 /* The "complete" command is used by Emacs to implement completion. */
2472 complete_command (arg
, from_tty
)
2484 argpoint
= strlen (arg
);
2486 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2488 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2490 printf_unfiltered ("%s\n", completion
);
2495 /* The "show" command with no arguments shows all the settings. */
2499 show_command (arg
, from_tty
)
2503 cmd_show_list (showlist
, from_tty
, "");
2506 /* Add an element to the list of commands. */
2509 add_com (name
, class, fun
, doc
)
2511 enum command_class
class;
2512 void (*fun
) PARAMS ((char *, int));
2515 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2518 /* Add an alias or abbreviation command to the list of commands. */
2521 add_com_alias (name
, oldname
, class, abbrev_flag
)
2524 enum command_class
class;
2527 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2534 error ("Argument required (%s).", why
);
2539 help_command (command
, from_tty
)
2541 int from_tty
; /* Ignored */
2543 help_cmd (command
, gdb_stdout
);
2547 validate_comname (comname
)
2553 error_no_arg ("name of command to define");
2558 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2559 error ("Junk in argument list: \"%s\"", p
);
2564 /* This is just a placeholder in the command data structures. */
2566 user_defined_command (ignore
, from_tty
)
2573 define_command (comname
, from_tty
)
2577 register struct command_line
*cmds
;
2578 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2579 char *tem
= comname
;
2580 #define HOOK_STRING "hook-"
2583 validate_comname (comname
);
2585 /* Look it up, and verify that we got an exact match. */
2586 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2587 if (c
&& !STREQ (comname
, c
->name
))
2592 if (c
->class == class_user
|| c
->class == class_alias
)
2593 tem
= "Redefine command \"%s\"? ";
2595 tem
= "Really redefine built-in command \"%s\"? ";
2596 if (!query (tem
, c
->name
))
2597 error ("Command \"%s\" not redefined.", c
->name
);
2600 /* If this new command is a hook, then mark the command which it
2601 is hooking. Note that we allow hooking `help' commands, so that
2602 we can hook the `stop' pseudo-command. */
2604 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2606 /* Look up cmd it hooks, and verify that we got an exact match. */
2607 tem
= comname
+HOOK_LEN
;
2608 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2609 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2613 warning ("Your new `%s' command does not hook any existing command.",
2615 if (!query ("Proceed? "))
2616 error ("Not confirmed.");
2620 comname
= savestring (comname
, strlen (comname
));
2622 /* If the rest of the commands will be case insensitive, this one
2623 should behave in the same manner. */
2624 for (tem
= comname
; *tem
; tem
++)
2625 if (isupper(*tem
)) *tem
= tolower(*tem
);
2629 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2630 End with a line saying just \"end\".\n", comname
);
2631 gdb_flush (gdb_stdout
);
2635 cmds
= read_command_lines ();
2637 if (c
&& c
->class == class_user
)
2638 free_command_lines (&c
->user_commands
);
2640 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2641 (c
&& c
->class == class_user
)
2642 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2643 newc
->user_commands
= cmds
;
2645 /* If this new command is a hook, then mark both commands as being
2649 hookc
->hook
= newc
; /* Target gets hooked. */
2650 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2655 document_command (comname
, from_tty
)
2659 struct command_line
*doclines
;
2660 register struct cmd_list_element
*c
;
2661 char *tem
= comname
;
2663 validate_comname (comname
);
2665 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2667 if (c
->class != class_user
)
2668 error ("Command \"%s\" is built-in.", comname
);
2671 printf_unfiltered ("Type documentation for \"%s\".\n\
2672 End with a line saying just \"end\".\n", comname
);
2674 doclines
= read_command_lines ();
2676 if (c
->doc
) free (c
->doc
);
2679 register struct command_line
*cl1
;
2680 register int len
= 0;
2682 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2683 len
+= strlen (cl1
->line
) + 1;
2685 c
->doc
= (char *) xmalloc (len
+ 1);
2688 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2690 strcat (c
->doc
, cl1
->line
);
2692 strcat (c
->doc
, "\n");
2696 free_command_lines (&doclines
);
2700 print_gnu_advertisement ()
2702 printf_unfiltered ("\
2703 GDB is free software and you are welcome to distribute copies of it\n\
2704 under certain conditions; type \"show copying\" to see the conditions.\n\
2705 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2710 print_gdb_version (stream
)
2713 fprintf_filtered (stream
, "\
2714 GDB %s (%s", version
, host_name
);
2716 if (!STREQ (host_name
, target_name
))
2717 fprintf_filtered (stream
, " --target %s", target_name
);
2719 fprintf_filtered (stream
, "), ");
2721 fprintf_filtered (stream
, "Copyright 1996 Free Software Foundation, Inc.");
2726 show_version (args
, from_tty
)
2731 print_gnu_advertisement ();
2732 print_gdb_version (gdb_stdout
);
2733 printf_filtered ("\n");
2737 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2743 printf_unfiltered ("%s", prompt
);
2744 gdb_flush (gdb_stdout
);
2748 quit_command (args
, from_tty
)
2754 /* An optional expression may be used to cause gdb to terminate with the
2755 value of that expression. */
2758 value_ptr val
= parse_and_eval (args
);
2760 exit_code
= (int) value_as_long (val
);
2763 if (inferior_pid
!= 0 && target_has_execution
)
2767 if (query ("The program is running. Quit anyway (and detach it)? "))
2768 target_detach (args
, from_tty
);
2770 error ("Not confirmed.");
2774 if (query ("The program is running. Quit anyway (and kill it)? "))
2777 error ("Not confirmed.");
2780 /* UDI wants this, to kill the TIP. */
2783 /* Save the history information if it is appropriate to do so. */
2784 if (write_history_p
&& history_filename
)
2785 write_history (history_filename
);
2790 /* Returns whether GDB is running on a terminal and whether the user
2791 desires that questions be asked of them on that terminal. */
2794 input_from_terminal_p ()
2796 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2801 pwd_command (args
, from_tty
)
2805 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2806 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2808 if (!STREQ (gdb_dirbuf
, current_directory
))
2809 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2810 current_directory
, gdb_dirbuf
);
2812 printf_unfiltered ("Working directory %s.\n", current_directory
);
2816 cd_command (dir
, from_tty
)
2821 /* Found something other than leading repetitions of "/..". */
2822 int found_real_path
;
2825 /* If the new directory is absolute, repeat is a no-op; if relative,
2826 repeat might be useful but is more likely to be a mistake. */
2830 error_no_arg ("new working directory");
2832 dir
= tilde_expand (dir
);
2833 make_cleanup (free
, dir
);
2835 if (chdir (dir
) < 0)
2836 perror_with_name (dir
);
2839 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2841 current_directory
= dir
;
2844 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2845 current_directory
= concat (current_directory
, dir
, NULL
);
2847 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2851 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2853 found_real_path
= 0;
2854 for (p
= current_directory
; *p
;)
2856 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2858 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2859 && (p
[3] == 0 || SLASH_P (p
[3])))
2861 if (found_real_path
)
2863 /* Search backwards for the directory just before the "/.."
2864 and obliterate it and the "/..". */
2866 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2869 if (q
== current_directory
)
2870 /* current_directory is
2871 a relative pathname ("can't happen"--leave it alone). */
2875 strcpy (q
- 1, p
+ 3);
2880 /* We are dealing with leading repetitions of "/..", for example
2881 "/../..", which is the Mach super-root. */
2886 found_real_path
= 1;
2891 forget_cached_source_info ();
2894 pwd_command ((char *) 0, 1);
2897 struct source_cleanup_lines_args
{
2900 char *old_pre_error
;
2901 char *old_error_pre_print
;
2905 source_cleanup_lines (args
)
2908 struct source_cleanup_lines_args
*p
=
2909 (struct source_cleanup_lines_args
*)args
;
2910 source_line_number
= p
->old_line
;
2911 source_file_name
= p
->old_file
;
2912 source_pre_error
= p
->old_pre_error
;
2913 error_pre_print
= p
->old_error_pre_print
;
2918 source_command (args
, from_tty
)
2923 struct cleanup
*old_cleanups
;
2925 struct source_cleanup_lines_args old_lines
;
2930 error ("source command requires pathname of file to source.");
2933 file
= tilde_expand (file
);
2934 old_cleanups
= make_cleanup (free
, file
);
2936 stream
= fopen (file
, FOPEN_RT
);
2938 perror_with_name (file
);
2940 make_cleanup (fclose
, stream
);
2942 old_lines
.old_line
= source_line_number
;
2943 old_lines
.old_file
= source_file_name
;
2944 old_lines
.old_pre_error
= source_pre_error
;
2945 old_lines
.old_error_pre_print
= error_pre_print
;
2946 make_cleanup (source_cleanup_lines
, &old_lines
);
2947 source_line_number
= 0;
2948 source_file_name
= file
;
2949 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2950 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2951 make_cleanup (free
, source_pre_error
);
2952 /* This will get set every time we read a line. So it won't stay "" for
2954 error_pre_print
= "";
2956 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2957 if (source_error_allocated
< needed_length
)
2959 source_error_allocated
*= 2;
2960 if (source_error_allocated
< needed_length
)
2961 source_error_allocated
= needed_length
;
2962 if (source_error
== NULL
)
2963 source_error
= xmalloc (source_error_allocated
);
2965 source_error
= xrealloc (source_error
, source_error_allocated
);
2968 read_command_file (stream
);
2970 do_cleanups (old_cleanups
);
2975 echo_command (text
, from_tty
)
2983 while ((c
= *p
++) != '\0')
2987 /* \ at end of argument is used after spaces
2988 so they won't be lost. */
2992 c
= parse_escape (&p
);
2994 printf_filtered ("%c", c
);
2997 printf_filtered ("%c", c
);
3000 /* Force this output to appear now. */
3002 gdb_flush (gdb_stdout
);
3007 dont_repeat_command (ignored
, from_tty
)
3011 *line
= 0; /* Can't call dont_repeat here because we're not
3012 necessarily reading from stdin. */
3015 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3017 /* Functions to manipulate the endianness of the target. */
3019 #ifndef TARGET_BYTE_ORDER_DEFAULT
3020 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3023 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3025 static int target_byte_order_auto
= 1;
3027 /* Called if the user enters ``set endian'' without an argument. */
3029 set_endian (args
, from_tty
)
3033 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3034 show_endian (args
, from_tty
);
3037 /* Called by ``set endian big''. */
3039 set_endian_big (args
, from_tty
)
3043 target_byte_order
= BIG_ENDIAN
;
3044 target_byte_order_auto
= 0;
3047 /* Called by ``set endian little''. */
3049 set_endian_little (args
, from_tty
)
3053 target_byte_order
= LITTLE_ENDIAN
;
3054 target_byte_order_auto
= 0;
3057 /* Called by ``set endian auto''. */
3059 set_endian_auto (args
, from_tty
)
3063 target_byte_order_auto
= 1;
3066 /* Called by ``show endian''. */
3068 show_endian (args
, from_tty
)
3073 (target_byte_order_auto
3074 ? "The target endianness is set automatically (currently %s endian)\n"
3075 : "The target is assumed to be %s endian\n");
3076 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3079 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3081 /* Set the endianness from a BFD. */
3083 set_endian_from_file (abfd
)
3086 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3089 if (bfd_big_endian (abfd
))
3092 want
= LITTLE_ENDIAN
;
3093 if (target_byte_order_auto
)
3094 target_byte_order
= want
;
3095 else if (target_byte_order
!= want
)
3096 warning ("%s endian file does not match %s endian target.",
3097 want
== BIG_ENDIAN
? "big" : "little",
3098 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3100 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3102 if (bfd_big_endian (abfd
)
3103 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3104 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3105 warning ("%s endian file does not match %s endian target.",
3106 bfd_big_endian (abfd
) ? "big" : "little",
3107 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3109 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3112 /* Functions to manipulate command line editing control variables. */
3114 /* Number of commands to print in each call to show_commands. */
3115 #define Hist_print 10
3117 show_commands (args
, from_tty
)
3121 /* Index for history commands. Relative to history_base. */
3124 /* Number of the history entry which we are planning to display next.
3125 Relative to history_base. */
3128 /* The first command in the history which doesn't exist (i.e. one more
3129 than the number of the last command). Relative to history_base. */
3132 extern HIST_ENTRY
*history_get
PARAMS ((int));
3134 /* Print out some of the commands from the command history. */
3135 /* First determine the length of the history list. */
3136 hist_len
= history_size
;
3137 for (offset
= 0; offset
< history_size
; offset
++)
3139 if (!history_get (history_base
+ offset
))
3148 if (args
[0] == '+' && args
[1] == '\0')
3149 /* "info editing +" should print from the stored position. */
3152 /* "info editing <exp>" should print around command number <exp>. */
3153 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3155 /* "show commands" means print the last Hist_print commands. */
3158 num
= hist_len
- Hist_print
;
3164 /* If there are at least Hist_print commands, we want to display the last
3165 Hist_print rather than, say, the last 6. */
3166 if (hist_len
- num
< Hist_print
)
3168 num
= hist_len
- Hist_print
;
3173 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3175 printf_filtered ("%5d %s\n", history_base
+ offset
,
3176 (history_get (history_base
+ offset
))->line
);
3179 /* The next command we want to display is the next one that we haven't
3183 /* If the user repeats this command with return, it should do what
3184 "show commands +" does. This is unnecessary if arg is null,
3185 because "show commands +" is not useful after "show commands". */
3186 if (from_tty
&& args
)
3193 /* Called by do_setshow_command. */
3196 set_history_size_command (args
, from_tty
, c
)
3199 struct cmd_list_element
*c
;
3201 if (history_size
== INT_MAX
)
3202 unstifle_history ();
3203 else if (history_size
>= 0)
3204 stifle_history (history_size
);
3207 history_size
= INT_MAX
;
3208 error ("History size must be non-negative");
3214 set_history (args
, from_tty
)
3218 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3219 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3224 show_history (args
, from_tty
)
3228 cmd_show_list (showhistlist
, from_tty
, "");
3231 int info_verbose
= 0; /* Default verbose msgs off */
3233 /* Called by do_setshow_command. An elaborate joke. */
3236 set_verbose (args
, from_tty
, c
)
3239 struct cmd_list_element
*c
;
3241 char *cmdname
= "verbose";
3242 struct cmd_list_element
*showcmd
;
3244 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3248 c
->doc
= "Set verbose printing of informational messages.";
3249 showcmd
->doc
= "Show verbose printing of informational messages.";
3253 c
->doc
= "Set verbosity.";
3254 showcmd
->doc
= "Show verbosity.";
3259 float_handler (signo
)
3262 /* This message is based on ANSI C, section 4.7. Note that integer
3263 divide by zero causes this, so "float" is a misnomer. */
3264 signal (SIGFPE
, float_handler
);
3265 error ("Erroneous arithmetic operation.");
3277 enablebreaklist
= NULL
;
3281 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3285 showhistlist
= NULL
;
3286 unsethistlist
= NULL
;
3287 #if MAINTENANCE_CMDS
3288 maintenancelist
= NULL
;
3289 maintenanceinfolist
= NULL
;
3290 maintenanceprintlist
= NULL
;
3292 setprintlist
= NULL
;
3293 showprintlist
= NULL
;
3294 setchecklist
= NULL
;
3295 showchecklist
= NULL
;
3298 /* Init the history buffer. Note that we are called after the init file(s)
3299 * have been read so that the user can change the history file via his
3300 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3301 * overrides all of this.
3309 tmpenv
= getenv ("HISTSIZE");
3311 history_size
= atoi (tmpenv
);
3312 else if (!history_size
)
3315 stifle_history (history_size
);
3317 tmpenv
= getenv ("GDBHISTFILE");
3319 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3320 else if (!history_filename
) {
3321 /* We include the current directory so that if the user changes
3322 directories the file written will be the same as the one
3324 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3326 read_history (history_filename
);
3332 struct cmd_list_element
*c
;
3334 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3336 add_prefix_cmd ("endian", class_support
, set_endian
,
3337 "Set endianness of target.",
3338 &endianlist
, "set endian ", 0, &setlist
);
3339 add_cmd ("big", class_support
, set_endian_big
,
3340 "Set target as being big endian.", &endianlist
);
3341 add_cmd ("little", class_support
, set_endian_little
,
3342 "Set target as being little endian.", &endianlist
);
3343 add_cmd ("auto", class_support
, set_endian_auto
,
3344 "Select target endianness automatically.", &endianlist
);
3345 add_cmd ("endian", class_support
, show_endian
,
3346 "Show endianness of target.", &showlist
);
3348 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3350 #ifdef DEFAULT_PROMPT
3351 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3353 prompt
= savestring ("(gdb) ", 6);
3356 /* Set the important stuff up for command editing. */
3357 command_editing_p
= 1;
3358 history_expansion_p
= 0;
3359 write_history_p
= 0;
3361 /* Setup important stuff for command line editing. */
3362 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3363 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3364 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3365 rl_readline_name
= "gdb";
3367 /* Define the classes of commands.
3368 They will appear in the help list in the reverse of this order. */
3370 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3371 "Maintenance commands.\n\
3372 Some gdb commands are provided just for use by gdb maintainers.\n\
3373 These commands are subject to frequent change, and may not be as\n\
3374 well documented as user commands.",
3376 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3377 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3378 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3379 The commands in this class are those defined by the user.\n\
3380 Use the \"define\" command to define a command.", &cmdlist
);
3381 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3382 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3383 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3384 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3385 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3386 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3387 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3388 counting from zero for the innermost (currently executing) frame.\n\n\
3389 At any time gdb identifies one frame as the \"selected\" frame.\n\
3390 Variable lookups are done with respect to the selected frame.\n\
3391 When the program being debugged stops, gdb selects the innermost frame.\n\
3392 The commands below can be used to select other frames by number or address.",
3394 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3396 add_com ("pwd", class_files
, pwd_command
,
3397 "Print working directory. This is used for your program as well.");
3398 c
= add_cmd ("cd", class_files
, cd_command
,
3399 "Set working directory to DIR for debugger and program being debugged.\n\
3400 The change does not take effect for the program being debugged\n\
3401 until the next time it is started.", &cmdlist
);
3402 c
->completer
= filename_completer
;
3405 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3410 add_com ("echo", class_support
, echo_command
,
3411 "Print a constant string. Give string as argument.\n\
3412 C escape sequences may be used in the argument.\n\
3413 No newline is added at the end of the argument;\n\
3414 use \"\\n\" if you want a newline to be printed.\n\
3415 Since leading and trailing whitespace are ignored in command arguments,\n\
3416 if you want to print some you must use \"\\\" before leading whitespace\n\
3417 to be printed or after trailing whitespace.");
3418 add_com ("document", class_support
, document_command
,
3419 "Document a user-defined command.\n\
3420 Give command name as argument. Give documentation on following lines.\n\
3421 End with a line of just \"end\".");
3422 add_com ("define", class_support
, define_command
,
3423 "Define a new command name. Command name is argument.\n\
3424 Definition appears on following lines, one command per line.\n\
3425 End with a line of just \"end\".\n\
3426 Use the \"document\" command to give documentation for the new command.\n\
3427 Commands defined in this way may have up to ten arguments.");
3430 c
= add_cmd ("source", class_support
, source_command
,
3431 "Read commands from a file named FILE.\n\
3432 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3433 when gdb is started.", &cmdlist
);
3435 /* Punt file name, we can't help it easily. */
3436 c
= add_cmd ("source", class_support
, source_command
,
3437 "Read commands from a file named FILE.\n\
3438 Note that the file \".gdbinit\" is read automatically in this way\n\
3439 when gdb is started.", &cmdlist
);
3441 c
->completer
= filename_completer
;
3443 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3444 add_com ("help", class_support
, help_command
, "Print list of commands.");
3445 add_com_alias ("q", "quit", class_support
, 1);
3446 add_com_alias ("h", "help", class_support
, 1);
3448 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3449 Primarily used inside of user-defined commands that should not be repeated when\n\
3452 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3455 add_show_from_set (c
, &showlist
);
3456 c
->function
.sfunc
= set_verbose
;
3457 set_verbose (NULL
, 0, c
);
3460 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3461 "Set editing of command lines as they are typed.\n\
3462 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3463 Without an argument, command line editing is enabled. To edit, use\n\
3464 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3467 add_prefix_cmd ("history", class_support
, set_history
,
3468 "Generic command for setting command history parameters.",
3469 &sethistlist
, "set history ", 0, &setlist
);
3470 add_prefix_cmd ("history", class_support
, show_history
,
3471 "Generic command for showing command history parameters.",
3472 &showhistlist
, "show history ", 0, &showlist
);
3475 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3476 "Set history expansion on command input.\n\
3477 Without an argument, history expansion is enabled.", &sethistlist
),
3481 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3482 "Set saving of the history record on exit.\n\
3483 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3484 Without an argument, saving is enabled.", &sethistlist
),
3487 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3488 "Set the size of the command history, \n\
3489 ie. the number of previous commands to keep a record of.", &sethistlist
);
3490 add_show_from_set (c
, &showhistlist
);
3491 c
->function
.sfunc
= set_history_size_command
;
3494 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3495 "Set the filename in which to record the command history\n\
3496 (the list of previous commands of which a record is kept).", &sethistlist
),
3500 (add_set_cmd ("confirm", class_support
, var_boolean
,
3502 "Set whether to confirm potentially dangerous operations.",
3506 add_prefix_cmd ("info", class_info
, info_command
,
3507 "Generic command for showing things about the program being debugged.",
3508 &infolist
, "info ", 0, &cmdlist
);
3509 add_com_alias ("i", "info", class_info
, 1);
3511 add_com ("complete", class_obscure
, complete_command
,
3512 "List the completions for the rest of the line as a command.");
3514 add_prefix_cmd ("show", class_info
, show_command
,
3515 "Generic command for showing things about the debugger.",
3516 &showlist
, "show ", 0, &cmdlist
);
3517 /* Another way to get at the same thing. */
3518 add_info ("set", show_command
, "Show all GDB settings.");
3520 add_cmd ("commands", no_class
, show_commands
,
3521 "Show the history of commands you typed.\n\
3522 You can supply a command number to start with, or a `+' to start after\n\
3523 the previous command number shown.",
3526 add_cmd ("version", no_class
, show_version
,
3527 "Show what version of GDB this is.", &showlist
);
3529 add_com ("while", class_support
, while_command
,
3530 "Execute nested commands WHILE the conditional expression is non zero.\n\
3531 The conditional expression must follow the word `while' and must in turn be\n\
3532 followed by a new line. The nested commands must be entered one per line,\n\
3533 and should be terminated by the word `end'.");
3535 add_com ("if", class_support
, if_command
,
3536 "Execute nested commands once IF the conditional expression is non zero.\n\
3537 The conditional expression must follow the word `if' and must in turn be\n\
3538 followed by a new line. The nested commands must be entered one per line,\n\
3539 and should be terminated by the word 'else' or `end'. If an else clause\n\
3540 is used, the same rules apply to its nested commands as to the first ones.");
3542 /* If target is open when baud changes, it doesn't take effect until the
3543 next open (I think, not sure). */
3544 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3545 var_zinteger
, (char *)&baud_rate
,
3546 "Set baud rate for remote serial I/O.\n\
3547 This value is used to set the speed of the serial port when debugging\n\
3548 using remote targets.", &setlist
),
3552 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3553 "Set debugging of remote protocol.\n\
3554 When enabled, each packet sent or received with the remote target\n\
3555 is displayed.", &setlist
),