1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 1997
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 extern void initialize_utils
PARAMS ((void));
56 /* Prototypes for local functions */
58 static void dont_repeat_command
PARAMS ((char *, int));
60 static void source_cleanup_lines
PARAMS ((PTR
));
62 static void user_defined_command
PARAMS ((char *, int));
64 static void init_signals
PARAMS ((void));
67 static void stop_sig
PARAMS ((int));
70 static char * line_completion_function
PARAMS ((char *, int, char *, int));
72 static char * readline_line_completion_function
PARAMS ((char *, int));
74 static void command_loop_marker
PARAMS ((int));
76 static void while_command
PARAMS ((char *, int));
78 static void if_command
PARAMS ((char *, int));
80 static struct command_line
*
81 build_command_line
PARAMS ((enum command_control_type
, char *));
83 static struct command_line
*
84 get_command_line
PARAMS ((enum command_control_type
, char *));
86 static void realloc_body_list
PARAMS ((struct command_line
*, int));
88 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
90 static enum command_control_type
91 recurse_read_control_structure
PARAMS ((struct command_line
*));
93 static struct cleanup
* setup_user_args
PARAMS ((char *));
95 static char * locate_arg
PARAMS ((char *));
97 static char * insert_args
PARAMS ((char *));
99 static void arg_cleanup
PARAMS ((void));
101 static void init_main
PARAMS ((void));
103 static void init_cmd_lists
PARAMS ((void));
105 static void float_handler
PARAMS ((int));
107 static void init_signals
PARAMS ((void));
109 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
111 #ifdef TARGET_BYTE_ORDER_SELECTABLE
113 static void set_endian
PARAMS ((char *, int));
115 static void set_endian_big
PARAMS ((char *, int));
117 static void set_endian_little
PARAMS ((char *, int));
119 static void set_endian_auto
PARAMS ((char *, int));
121 static void show_endian
PARAMS ((char *, int));
125 static void show_history
PARAMS ((char *, int));
127 static void set_history
PARAMS ((char *, int));
129 static void set_history_size_command
PARAMS ((char *, int,
130 struct cmd_list_element
*));
132 static void show_commands
PARAMS ((char *, int));
134 static void echo_command
PARAMS ((char *, int));
136 static void pwd_command
PARAMS ((char *, int));
138 static void show_version
PARAMS ((char *, int));
140 static void document_command
PARAMS ((char *, int));
142 static void define_command
PARAMS ((char *, int));
144 static void validate_comname
PARAMS ((char *));
146 static void help_command
PARAMS ((char *, int));
148 static void show_command
PARAMS ((char *, int));
150 static void info_command
PARAMS ((char *, int));
152 static void complete_command
PARAMS ((char *, int));
154 static void do_nothing
PARAMS ((int));
157 static int quit_cover
PARAMS ((char *));
159 static void disconnect
PARAMS ((int));
162 static void source_cleanup
PARAMS ((FILE *));
164 /* If this definition isn't overridden by the header files, assume
165 that isatty and fileno exist on this system. */
167 #define ISATTY(FP) (isatty (fileno (FP)))
170 /* Initialization file name for gdb. This is overridden in some configs. */
172 #ifndef GDBINIT_FILENAME
173 #define GDBINIT_FILENAME ".gdbinit"
175 char gdbinit
[] = GDBINIT_FILENAME
;
177 int inhibit_gdbinit
= 0;
179 /* If nonzero, and GDB has been configured to be able to use windows,
180 attempt to open them upon startup. */
184 /* Version number of GDB, as a string. */
186 extern char *version
;
188 /* Canonical host name as a string. */
190 extern char *host_name
;
192 /* Canonical target name as a string. */
194 extern char *target_name
;
196 extern char lang_frame_mismatch_warn
[]; /* language.c */
198 /* Flag for whether we want all the "from_tty" gubbish printed. */
200 int caution
= 1; /* Default is yes, sigh. */
202 /* Define all cmd_list_elements. */
204 /* Chain containing all defined commands. */
206 struct cmd_list_element
*cmdlist
;
208 /* Chain containing all defined info subcommands. */
210 struct cmd_list_element
*infolist
;
212 /* Chain containing all defined enable subcommands. */
214 struct cmd_list_element
*enablelist
;
216 /* Chain containing all defined disable subcommands. */
218 struct cmd_list_element
*disablelist
;
220 /* Chain containing all defined delete subcommands. */
222 struct cmd_list_element
*deletelist
;
224 /* Chain containing all defined "enable breakpoint" subcommands. */
226 struct cmd_list_element
*enablebreaklist
;
228 /* Chain containing all defined set subcommands */
230 struct cmd_list_element
*setlist
;
232 /* Chain containing all defined unset subcommands */
234 struct cmd_list_element
*unsetlist
;
236 /* Chain containing all defined show subcommands. */
238 struct cmd_list_element
*showlist
;
240 #ifdef TARGET_BYTE_ORDER_SELECTABLE
241 /* Chain containing the \"set endian\" commands. */
243 struct cmd_list_element
*endianlist
;
246 /* Chain containing all defined \"set history\". */
248 struct cmd_list_element
*sethistlist
;
250 /* Chain containing all defined \"show history\". */
252 struct cmd_list_element
*showhistlist
;
254 /* Chain containing all defined \"unset history\". */
256 struct cmd_list_element
*unsethistlist
;
258 /* Chain containing all defined maintenance subcommands. */
261 struct cmd_list_element
*maintenancelist
;
264 /* Chain containing all defined "maintenance info" subcommands. */
267 struct cmd_list_element
*maintenanceinfolist
;
270 /* Chain containing all defined "maintenance print" subcommands. */
273 struct cmd_list_element
*maintenanceprintlist
;
276 struct cmd_list_element
*setprintlist
;
278 struct cmd_list_element
*showprintlist
;
280 struct cmd_list_element
*setchecklist
;
282 struct cmd_list_element
*showchecklist
;
284 /* stdio stream that command input is being read from. Set to stdin normally.
285 Set by source_command to the file we are sourcing. Set to NULL if we are
286 executing a user-defined command or interacting via a GUI. */
290 /* Current working directory. */
292 char *current_directory
;
294 /* The directory name is actually stored here (usually). */
295 char gdb_dirbuf
[1024];
297 /* Function to call before reading a command, if nonzero.
298 The function receives two args: an input stream,
299 and a prompt string. */
301 void (*window_hook
) PARAMS ((FILE *, char *));
306 /* gdb prints this when reading a command interactively */
309 /* Buffer used for reading command lines, and the size
310 allocated for it so far. */
315 /* Nonzero if the current command is modified by "server ". This
316 affects things like recording into the command history, comamnds
317 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
318 whatever) can issue its own commands and also send along commands
319 from the user, and have the user not notice that the user interface
320 is issuing commands too. */
323 /* Baud rate specified for talking to serial target systems. Default
324 is left as -1, so targets can choose their own defaults. */
325 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
326 or (unsigned int)-1. This is a Bad User Interface. */
330 /* Timeout limit for response from target. */
332 int remote_timeout
= 20; /* Set default to 20 */
334 /* Non-zero tells remote* modules to output debugging info. */
336 int remote_debug
= 0;
338 /* Level of control structure. */
339 static int control_level
;
341 /* Structure for arguments to user defined functions. */
342 #define MAXUSERARGS 10
345 struct user_args
*next
;
354 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
358 #define STOP_SIGNAL SIGTSTP
359 static void stop_sig
PARAMS ((int));
363 /* Some System V have job control but not sigsetmask(). */
364 #if !defined (HAVE_SIGSETMASK)
366 #define HAVE_SIGSETMASK 1
368 #define HAVE_SIGSETMASK 0
372 #if 0 == (HAVE_SIGSETMASK)
373 #define sigsetmask(n)
376 /* Hooks for alternate command interfaces. */
378 /* Called after most modules have been initialized, but before taking users
381 void (*init_ui_hook
) PARAMS ((void));
383 /* Called instead of command_loop at top level. Can be invoked via
384 return_to_top_level. */
386 void (*command_loop_hook
) PARAMS ((void));
389 /* Called instead of fputs for all output. */
391 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
393 /* Called when the target says something to the host, which may
394 want to appear in a different window. */
396 void (*target_output_hook
) PARAMS ((char *));
398 /* Called from print_frame_info to list the line we stopped in. */
400 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
401 int stopline
, int noerror
));
402 /* Replaces most of query. */
404 int (*query_hook
) PARAMS ((const char *, va_list));
406 /* Called from gdb_flush to flush output. */
408 void (*flush_hook
) PARAMS ((FILE *stream
));
410 /* These three functions support getting lines of text from the user. They
411 are used in sequence. First readline_begin_hook is called with a text
412 string that might be (for example) a message for the user to type in a
413 sequence of commands to be executed at a breakpoint. If this function
414 calls back to a GUI, it might take this opportunity to pop up a text
415 interaction window with this message. Next, readline_hook is called
416 with a prompt that is emitted prior to collecting the user input.
417 It can be called multiple times. Finally, readline_end_hook is called
418 to notify the GUI that we are done with the interaction window and it
421 void (*readline_begin_hook
) PARAMS ((char *, ...));
422 char * (*readline_hook
) PARAMS ((char *));
423 void (*readline_end_hook
) PARAMS ((void));
425 /* Called as appropriate to notify the interface of the specified breakpoint
428 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
429 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
430 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
432 /* Called during long calculations to allow GUI to repair window damage, and to
433 check for stop buttons, etc... */
435 void (*interactive_hook
) PARAMS ((void));
437 /* Called when the registers have changed, as a hint to a GUI
438 to minimize window update. */
440 void (*registers_changed_hook
) PARAMS ((void));
442 /* Called when going to wait for the target. Usually allows the GUI to run
443 while waiting for target events. */
445 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
447 /* Used by UI as a wrapper around command execution. May do various things
448 like enabling/disabling buttons, etc... */
450 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
454 /* Takes control from error (). Typically used to prevent longjmps out of the
455 middle of the GUI. Usually used in conjunction with a catch routine. */
457 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
460 /* Where to go for return_to_top_level (RETURN_ERROR). */
461 jmp_buf error_return
;
462 /* Where to go for return_to_top_level (RETURN_QUIT). */
465 /* Return for reason REASON. This generally gets back to the command
466 loop, but can be caught via catch_errors. */
469 return_to_top_level (reason
)
470 enum return_reason reason
;
475 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
476 I can think of a reason why that is vital, though). */
477 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
479 disable_current_display ();
480 do_cleanups (ALL_CLEANUPS
);
482 if (annotation_level
> 1)
493 (NORETURN
void) longjmp
494 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
497 /* Call FUNC with arg ARGS, catching any errors. If there is no
498 error, return the value returned by FUNC. If there is an error,
499 print ERRSTRING, print the specific error message, then return
502 Must not be called with immediate_quit in effect (bad things might
503 happen, say we got a signal in the middle of a memcpy to quit_return).
504 This is an OK restriction; with very few exceptions immediate_quit can
505 be replaced by judicious use of QUIT.
507 MASK specifies what to catch; it is normally set to
508 RETURN_MASK_ALL, if for no other reason than that the code which
509 calls catch_errors might not be set up to deal with a quit which
510 isn't caught. But if the code can deal with it, it generally
511 should be RETURN_MASK_ERROR, unless for some reason it is more
512 useful to abort only the portion of the operation inside the
513 catch_errors. Note that quit should return to the command line
514 fairly quickly, even if some further processing is being done. */
517 catch_errors (func
, args
, errstring
, mask
)
518 int (*func
) PARAMS ((char *));
527 struct cleanup
*saved_cleanup_chain
;
528 char *saved_error_pre_print
;
529 char *saved_quit_pre_print
;
531 saved_cleanup_chain
= save_cleanups ();
532 saved_error_pre_print
= error_pre_print
;
533 saved_quit_pre_print
= quit_pre_print
;
535 if (mask
& RETURN_MASK_ERROR
)
537 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
538 error_pre_print
= errstring
;
540 if (mask
& RETURN_MASK_QUIT
)
542 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
543 quit_pre_print
= errstring
;
546 if (setjmp (tmp_jmp
) == 0)
548 if (mask
& RETURN_MASK_ERROR
)
549 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
550 if (mask
& RETURN_MASK_QUIT
)
551 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
552 val
= (*func
) (args
);
557 restore_cleanups (saved_cleanup_chain
);
559 if (mask
& RETURN_MASK_ERROR
)
561 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
562 error_pre_print
= saved_error_pre_print
;
564 if (mask
& RETURN_MASK_QUIT
)
566 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
567 quit_pre_print
= saved_quit_pre_print
;
572 /* Handler for SIGHUP. */
579 catch_errors (quit_cover
, NULL
,
580 "Could not kill the program being debugged", RETURN_MASK_ALL
);
581 signal (SIGHUP
, SIG_DFL
);
582 kill (getpid (), SIGHUP
);
585 /* Just a little helper function for disconnect(). */
591 caution
= 0; /* Throw caution to the wind -- we're exiting.
592 This prevents asking the user dumb questions. */
593 quit_command((char *)0, 0);
596 #endif /* defined SIGHUP */
598 /* Line number we are currently in in a file which is being sourced. */
599 static int source_line_number
;
601 /* Name of the file we are sourcing. */
602 static char *source_file_name
;
604 /* Buffer containing the error_pre_print used by the source stuff.
606 static char *source_error
;
607 static int source_error_allocated
;
609 /* Something to glom on to the start of error_pre_print if source_file_name
611 static char *source_pre_error
;
613 /* Clean up on error during a "source" command (or execution of a
614 user-defined command). */
617 source_cleanup (stream
)
620 /* Restore the previous input stream. */
624 /* Read commands from STREAM. */
626 read_command_file (stream
)
629 struct cleanup
*cleanups
;
631 cleanups
= make_cleanup (source_cleanup
, instream
);
634 do_cleanups (cleanups
);
637 extern void init_proc
PARAMS ((void));
639 void (*pre_init_ui_hook
) PARAMS ((void));
644 if (pre_init_ui_hook
)
647 /* Run the init function of each source file */
649 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
650 current_directory
= gdb_dirbuf
;
652 init_cmd_lists (); /* This needs to be done first */
653 initialize_targets (); /* Setup target_terminal macros for utils.c */
654 initialize_utils (); /* Make errors and warnings possible */
655 initialize_all_files ();
656 init_main (); /* But that omits this file! Do it now */
661 /* We need a default language for parsing expressions, so simple things like
662 "set width 0" won't fail if no language is explicitly set in a config file
663 or implicitly set by reading an executable during startup. */
664 set_language (language_c
);
665 expected_language
= current_language
; /* don't warn about the change. */
671 /* Allocate, initialize a new command line structure for one of the
672 control commands (if/while). */
674 static struct command_line
*
675 build_command_line (type
, args
)
676 enum command_control_type type
;
679 struct command_line
*cmd
;
682 error ("if/while commands require arguments.\n");
684 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
686 cmd
->control_type
= type
;
690 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
692 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
693 cmd
->line
= savestring (args
, strlen (args
));
697 /* Build and return a new command structure for the control commands
698 such as "if" and "while". */
700 static struct command_line
*
701 get_command_line (type
, arg
)
702 enum command_control_type type
;
705 struct command_line
*cmd
;
706 struct cleanup
*old_chain
= NULL
;
708 /* Allocate and build a new command line structure. */
709 cmd
= build_command_line (type
, arg
);
711 old_chain
= make_cleanup (free_command_lines
, &cmd
);
713 /* Read in the body of this command. */
714 if (recurse_read_control_structure (cmd
) == invalid_control
)
716 warning ("error reading in control structure\n");
717 do_cleanups (old_chain
);
721 discard_cleanups (old_chain
);
725 /* Recursively print a command (including full control structures). */
727 print_command_line (cmd
, depth
)
728 struct command_line
*cmd
;
735 for (i
= 0; i
< depth
; i
++)
736 fputs_filtered (" ", gdb_stdout
);
739 /* A simple command, print it and return. */
740 if (cmd
->control_type
== simple_control
)
742 fputs_filtered (cmd
->line
, gdb_stdout
);
743 fputs_filtered ("\n", gdb_stdout
);
747 /* loop_continue to jump to the start of a while loop, print it
749 if (cmd
->control_type
== continue_control
)
751 fputs_filtered ("loop_continue\n", gdb_stdout
);
755 /* loop_break to break out of a while loop, print it and return. */
756 if (cmd
->control_type
== break_control
)
758 fputs_filtered ("loop_break\n", gdb_stdout
);
762 /* A while command. Recursively print its subcommands before returning. */
763 if (cmd
->control_type
== while_control
)
765 struct command_line
*list
;
766 fputs_filtered ("while ", gdb_stdout
);
767 fputs_filtered (cmd
->line
, gdb_stdout
);
768 fputs_filtered ("\n", gdb_stdout
);
769 list
= *cmd
->body_list
;
772 print_command_line (list
, depth
+ 1);
777 /* An if command. Recursively print both arms before returning. */
778 if (cmd
->control_type
== if_control
)
780 fputs_filtered ("if ", gdb_stdout
);
781 fputs_filtered (cmd
->line
, gdb_stdout
);
782 fputs_filtered ("\n", gdb_stdout
);
784 print_command_line (cmd
->body_list
[0], depth
+ 1);
786 /* Show the false arm if it exists. */
787 if (cmd
->body_count
== 2)
791 for (i
= 0; i
< depth
; i
++)
792 fputs_filtered (" ", gdb_stdout
);
794 fputs_filtered ("else\n", gdb_stdout
);
795 print_command_line (cmd
->body_list
[1], depth
+ 1);
799 for (i
= 0; i
< depth
; i
++)
800 fputs_filtered (" ", gdb_stdout
);
802 fputs_filtered ("end\n", gdb_stdout
);
806 /* Execute the command in CMD. */
808 enum command_control_type
809 execute_control_command (cmd
)
810 struct command_line
*cmd
;
812 struct expression
*expr
;
813 struct command_line
*current
;
814 struct cleanup
*old_chain
= 0;
818 enum command_control_type ret
;
821 switch (cmd
->control_type
)
824 /* A simple command, execute it and return. */
825 new_line
= insert_args (cmd
->line
);
827 return invalid_control
;
828 old_chain
= make_cleanup (free_current_contents
, &new_line
);
829 execute_command (new_line
, 0);
830 ret
= cmd
->control_type
;
833 case continue_control
:
835 /* Return for "continue", and "break" so we can either
836 continue the loop at the top, or break out. */
837 ret
= cmd
->control_type
;
842 /* Parse the loop control expression for the while statement. */
843 new_line
= insert_args (cmd
->line
);
845 return invalid_control
;
846 old_chain
= make_cleanup (free_current_contents
, &new_line
);
847 expr
= parse_expression (new_line
);
848 make_cleanup (free_current_contents
, &expr
);
850 ret
= simple_control
;
853 /* Keep iterating so long as the expression is true. */
860 /* Evaluate the expression. */
861 val_mark
= value_mark ();
862 val
= evaluate_expression (expr
);
863 cond_result
= value_true (val
);
864 value_free_to_mark (val_mark
);
866 /* If the value is false, then break out of the loop. */
870 /* Execute the body of the while statement. */
871 current
= *cmd
->body_list
;
874 ret
= execute_control_command (current
);
876 /* If we got an error, or a "break" command, then stop
878 if (ret
== invalid_control
|| ret
== break_control
)
884 /* If we got a "continue" command, then restart the loop
886 if (ret
== continue_control
)
889 /* Get the next statement. */
890 current
= current
->next
;
894 /* Reset RET so that we don't recurse the break all the way down. */
895 if (ret
== break_control
)
896 ret
= simple_control
;
903 new_line
= insert_args (cmd
->line
);
905 return invalid_control
;
906 old_chain
= make_cleanup (free_current_contents
, &new_line
);
907 /* Parse the conditional for the if statement. */
908 expr
= parse_expression (new_line
);
909 make_cleanup (free_current_contents
, &expr
);
912 ret
= simple_control
;
914 /* Evaluate the conditional. */
915 val_mark
= value_mark ();
916 val
= evaluate_expression (expr
);
918 /* Choose which arm to take commands from based on the value of the
919 conditional expression. */
920 if (value_true (val
))
921 current
= *cmd
->body_list
;
922 else if (cmd
->body_count
== 2)
923 current
= *(cmd
->body_list
+ 1);
924 value_free_to_mark (val_mark
);
926 /* Execute commands in the given arm. */
929 ret
= execute_control_command (current
);
931 /* If we got an error, get out. */
932 if (ret
!= simple_control
)
935 /* Get the next statement in the body. */
936 current
= current
->next
;
943 warning ("Invalid control type in command structure.");
944 return invalid_control
;
948 do_cleanups (old_chain
);
953 /* "while" command support. Executes a body of statements while the
954 loop condition is nonzero. */
957 while_command (arg
, from_tty
)
961 struct command_line
*command
= NULL
;
964 command
= get_command_line (while_control
, arg
);
969 execute_control_command (command
);
970 free_command_lines (&command
);
973 /* "if" command support. Execute either the true or false arm depending
974 on the value of the if conditional. */
977 if_command (arg
, from_tty
)
981 struct command_line
*command
= NULL
;
984 command
= get_command_line (if_control
, arg
);
989 execute_control_command (command
);
990 free_command_lines (&command
);
997 struct user_args
*oargs
= user_args
;
999 fatal ("Internal error, arg_cleanup called with no user args.\n");
1001 user_args
= user_args
->next
;
1005 /* Bind the incomming arguments for a user defined command to
1006 $arg0, $arg1 ... $argMAXUSERARGS. */
1008 static struct cleanup
*
1012 struct user_args
*args
;
1013 struct cleanup
*old_chain
;
1014 unsigned int arg_count
= 0;
1016 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1017 memset (args
, 0, sizeof (struct user_args
));
1019 args
->next
= user_args
;
1022 old_chain
= make_cleanup (arg_cleanup
, 0);
1034 if (arg_count
>= MAXUSERARGS
)
1036 error ("user defined function may only have %d arguments.\n",
1041 /* Strip whitespace. */
1042 while (*p
== ' ' || *p
== '\t')
1045 /* P now points to an argument. */
1047 user_args
->a
[arg_count
].arg
= p
;
1049 /* Get to the end of this argument. */
1052 if (((*p
== ' ' || *p
== '\t')) && !squote
&& !dquote
&& !bsquote
)
1058 else if (*p
== '\\')
1081 user_args
->a
[arg_count
].len
= p
- start_arg
;
1088 /* Given character string P, return a point to the first argument ($arg),
1089 or NULL if P contains no arguments. */
1095 while ((p
= strchr (p
, '$')))
1097 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1104 /* Insert the user defined arguments stored in user_arg into the $arg
1105 arguments found in line, with the updated copy being placed into nline. */
1111 char *p
, *save_line
, *new_line
;
1114 /* First we need to know how much memory to allocate for the new line. */
1117 while ((p
= locate_arg (line
)))
1122 if (i
>= user_args
->count
)
1124 error ("Missing argument %d in user function.\n", i
);
1127 len
+= user_args
->a
[i
].len
;
1131 /* Don't forget the tail. */
1132 len
+= strlen (line
);
1134 /* Allocate space for the new line and fill it in. */
1135 new_line
= (char *)xmalloc (len
+ 1);
1136 if (new_line
== NULL
)
1139 /* Restore pointer to beginning of old line. */
1142 /* Save pointer to beginning of new line. */
1143 save_line
= new_line
;
1145 while ((p
= locate_arg (line
)))
1149 memcpy (new_line
, line
, p
- line
);
1150 new_line
+= p
- line
;
1153 len
= user_args
->a
[i
].len
;
1156 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1161 /* Don't forget the tail. */
1162 strcpy (new_line
, line
);
1164 /* Return a pointer to the beginning of the new line. */
1169 execute_user_command (c
, args
)
1170 struct cmd_list_element
*c
;
1173 register struct command_line
*cmdlines
;
1174 struct cleanup
*old_chain
;
1175 enum command_control_type ret
;
1177 old_chain
= setup_user_args (args
);
1179 cmdlines
= c
->user_commands
;
1184 /* Set the instream to 0, indicating execution of a
1185 user-defined function. */
1186 old_chain
= make_cleanup (source_cleanup
, instream
);
1187 instream
= (FILE *) 0;
1190 ret
= execute_control_command (cmdlines
);
1191 if (ret
!= simple_control
&& ret
!= break_control
)
1193 warning ("Error in control structure.\n");
1196 cmdlines
= cmdlines
->next
;
1198 do_cleanups (old_chain
);
1201 /* Execute the line P as a command.
1202 Pass FROM_TTY as second argument to the defining function. */
1205 execute_command (p
, from_tty
)
1209 register struct cmd_list_element
*c
;
1210 register enum language flang
;
1211 static int warned
= 0;
1212 /* FIXME: These should really be in an appropriate header file */
1213 extern void serial_log_command
PARAMS ((const char *));
1217 /* This can happen when command_line_input hits end of file. */
1221 serial_log_command (p
);
1223 while (*p
== ' ' || *p
== '\t') p
++;
1228 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1229 /* Pass null arg rather than an empty one. */
1232 /* Clear off trailing whitespace, except for set and complete command. */
1233 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1235 p
= arg
+ strlen (arg
) - 1;
1236 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1241 /* If this command has been hooked, run the hook first. */
1243 execute_user_command (c
->hook
, (char *)0);
1245 if (c
->class == class_user
)
1246 execute_user_command (c
, arg
);
1247 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1248 do_setshow_command (arg
, from_tty
& caution
, c
);
1249 else if (c
->function
.cfunc
== NO_FUNCTION
)
1250 error ("That is not a command, just a help topic.");
1251 else if (call_command_hook
)
1252 call_command_hook (c
, arg
, from_tty
& caution
);
1254 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1257 /* Tell the user if the language has changed (except first time). */
1258 if (current_language
!= expected_language
)
1260 if (language_mode
== language_mode_auto
) {
1261 language_info (1); /* Print what changed. */
1266 /* Warn the user if the working language does not match the
1267 language of the current frame. Only warn the user if we are
1268 actually running the program, i.e. there is a stack. */
1269 /* FIXME: This should be cacheing the frame and only running when
1270 the frame changes. */
1272 if (target_has_stack
)
1274 flang
= get_frame_language ();
1276 && flang
!= language_unknown
1277 && flang
!= current_language
->la_language
)
1279 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1287 command_loop_marker (foo
)
1292 /* Read commands from `instream' and execute them
1293 until end of file or error reading instream. */
1298 struct cleanup
*old_chain
;
1300 int stdin_is_tty
= ISATTY (stdin
);
1301 long time_at_cmd_start
;
1303 long space_at_cmd_start
;
1305 extern int display_time
;
1306 extern int display_space
;
1308 while (instream
&& !feof (instream
))
1310 if (window_hook
&& instream
== stdin
)
1311 (*window_hook
) (instream
, prompt
);
1314 if (instream
== stdin
&& stdin_is_tty
)
1315 reinitialize_more_filter ();
1316 old_chain
= make_cleanup (command_loop_marker
, 0);
1317 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1318 instream
== stdin
, "prompt");
1322 time_at_cmd_start
= get_run_time ();
1327 extern char **environ
;
1328 char *lim
= (char *) sbrk (0);
1330 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1334 execute_command (command
, instream
== stdin
);
1335 /* Do any commands attached to breakpoint we stopped at. */
1336 bpstat_do_actions (&stop_bpstat
);
1337 do_cleanups (old_chain
);
1341 long cmd_time
= get_run_time () - time_at_cmd_start
;
1343 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1344 cmd_time
/ 1000000, cmd_time
% 1000000);
1350 extern char **environ
;
1351 char *lim
= (char *) sbrk (0);
1352 long space_now
= lim
- (char *) &environ
;
1353 long space_diff
= space_now
- space_at_cmd_start
;
1355 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1357 (space_diff
>= 0 ? '+' : '-'),
1364 /* Commands call this if they do not want to be repeated by null lines. */
1372 /* If we aren't reading from standard input, we are saving the last
1373 thing read from stdin in line and don't want to delete it. Null lines
1374 won't repeat here in any case. */
1375 if (instream
== stdin
)
1379 /* Read a line from the stream "instream" without command line editing.
1381 It prints PRROMPT once at the start.
1382 Action is compatible with "readline", e.g. space for the result is
1383 malloc'd and should be freed by the caller.
1385 A NULL return means end of file. */
1387 gdb_readline (prrompt
)
1392 int input_index
= 0;
1393 int result_size
= 80;
1397 /* Don't use a _filtered function here. It causes the assumed
1398 character position to be off, since the newline we read from
1399 the user is not accounted for. */
1400 fputs_unfiltered (prrompt
, gdb_stdout
);
1402 /* Move to a new line so the entered line doesn't have a prompt
1403 on the front of it. */
1404 fputs_unfiltered ("\n", gdb_stdout
);
1406 gdb_flush (gdb_stdout
);
1409 result
= (char *) xmalloc (result_size
);
1413 /* Read from stdin if we are executing a user defined command.
1414 This is the right thing for prompt_for_continue, at least. */
1415 c
= fgetc (instream
? instream
: stdin
);
1419 if (input_index
> 0)
1420 /* The last line does not end with a newline. Return it, and
1421 if we are called again fgetc will still return EOF and
1422 we'll return NULL then. */
1431 result
[input_index
++] = c
;
1432 while (input_index
>= result_size
)
1435 result
= (char *) xrealloc (result
, result_size
);
1439 result
[input_index
++] = '\0';
1443 /* Variables which control command line editing and history
1444 substitution. These variables are given default values at the end
1446 static int command_editing_p
;
1447 static int history_expansion_p
;
1448 static int write_history_p
;
1449 static int history_size
;
1450 static char *history_filename
;
1452 /* readline uses the word breaks for two things:
1453 (1) In figuring out where to point the TEXT parameter to the
1454 rl_completion_entry_function. Since we don't use TEXT for much,
1455 it doesn't matter a lot what the word breaks are for this purpose, but
1456 it does affect how much stuff M-? lists.
1457 (2) If one of the matches contains a word break character, readline
1458 will quote it. That's why we switch between
1459 gdb_completer_word_break_characters and
1460 gdb_completer_command_word_break_characters. I'm not sure when
1461 we need this behavior (perhaps for funky characters in C++ symbols?). */
1463 /* Variables which are necessary for fancy command line editing. */
1464 char *gdb_completer_word_break_characters
=
1465 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1467 /* When completing on command names, we remove '-' from the list of
1468 word break characters, since we use it in command names. If the
1469 readline library sees one in any of the current completion strings,
1470 it thinks that the string needs to be quoted and automatically supplies
1472 char *gdb_completer_command_word_break_characters
=
1473 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1475 /* Characters that can be used to quote completion strings. Note that we
1476 can't include '"' because the gdb C parser treats such quoted sequences
1478 char *gdb_completer_quote_characters
=
1481 /* Functions that are used as part of the fancy command line editing. */
1483 /* This can be used for functions which don't want to complete on symbols
1484 but don't want to complete on anything else either. */
1487 noop_completer (text
, prefix
)
1494 /* Complete on filenames. */
1496 filename_completer (text
, word
)
1500 /* From readline. */
1501 extern char *filename_completion_function
PARAMS ((char *, int));
1502 int subsequent_name
;
1504 int return_val_used
;
1505 int return_val_alloced
;
1507 return_val_used
= 0;
1508 /* Small for testing. */
1509 return_val_alloced
= 1;
1510 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1512 subsequent_name
= 0;
1516 p
= filename_completion_function (text
, subsequent_name
);
1517 if (return_val_used
>= return_val_alloced
)
1519 return_val_alloced
*= 2;
1521 (char **) xrealloc (return_val
,
1522 return_val_alloced
* sizeof (char *));
1526 return_val
[return_val_used
++] = p
;
1529 /* Like emacs, don't complete on old versions. Especially useful
1530 in the "source" command. */
1531 if (p
[strlen (p
) - 1] == '~')
1537 /* Return exactly p. */
1538 return_val
[return_val_used
++] = p
;
1539 else if (word
> text
)
1541 /* Return some portion of p. */
1542 q
= xmalloc (strlen (p
) + 5);
1543 strcpy (q
, p
+ (word
- text
));
1544 return_val
[return_val_used
++] = q
;
1549 /* Return some of TEXT plus p. */
1550 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1551 strncpy (q
, word
, text
- word
);
1552 q
[text
- word
] = '\0';
1554 return_val
[return_val_used
++] = q
;
1558 subsequent_name
= 1;
1561 /* There is no way to do this just long enough to affect quote inserting
1562 without also affecting the next completion. This should be fixed in
1564 /* Insure that readline does the right thing
1565 with respect to inserting quotes. */
1566 rl_completer_word_break_characters
= "";
1571 /* Here are some useful test cases for completion. FIXME: These should
1572 be put in the test suite. They should be tested with both M-? and TAB.
1574 "show output-" "radix"
1575 "show output" "-radix"
1576 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1577 "p " ambiguous (all symbols)
1578 "info t foo" no completions
1579 "info t " no completions
1580 "info t" ambiguous ("info target", "info terminal", etc.)
1581 "info ajksdlfk" no completions
1582 "info ajksdlfk " no completions
1584 "info " ambiguous (all info commands)
1585 "p \"a" no completions (string constant)
1586 "p 'a" ambiguous (all symbols starting with a)
1587 "p b-a" ambiguous (all symbols starting with a)
1588 "p b-" ambiguous (all symbols)
1589 "file Make" "file" (word break hard to screw up here)
1590 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1593 /* Generate completions one by one for the completer. Each time we are
1594 called return another potential completion to the caller.
1595 line_completion just completes on commands or passes the buck to the
1596 command's completer function, the stuff specific to symbol completion
1597 is in make_symbol_completion_list.
1599 TEXT is the caller's idea of the "word" we are looking at.
1601 MATCHES is the number of matches that have currently been collected from
1602 calling this completion function. When zero, then we need to initialize,
1603 otherwise the initialization has already taken place and we can just
1604 return the next potential completion string.
1606 LINE_BUFFER is available to be looked at; it contains the entire text
1607 of the line. POINT is the offset in that line of the cursor. You
1608 should pretend that the line ends at POINT.
1610 Returns NULL if there are no more completions, else a pointer to a string
1611 which is a possible completion, it is the caller's responsibility to
1615 line_completion_function (text
, matches
, line_buffer
, point
)
1621 static char **list
= (char **)NULL
; /* Cache of completions */
1622 static int index
; /* Next cached completion */
1623 char *output
= NULL
;
1624 char *tmp_command
, *p
;
1625 /* Pointer within tmp_command which corresponds to text. */
1627 struct cmd_list_element
*c
, *result_list
;
1631 /* The caller is beginning to accumulate a new set of completions, so
1632 we need to find all of them now, and cache them for returning one at
1633 a time on future calls. */
1637 /* Free the storage used by LIST, but not by the strings inside.
1638 This is because rl_complete_internal () frees the strings. */
1644 /* Choose the default set of word break characters to break completions.
1645 If we later find out that we are doing completions on command strings
1646 (as opposed to strings supplied by the individual command completer
1647 functions, which can be any string) then we will switch to the
1648 special word break set for command strings, which leaves out the
1649 '-' character used in some commands. */
1651 rl_completer_word_break_characters
=
1652 gdb_completer_word_break_characters
;
1654 /* Decide whether to complete on a list of gdb commands or on symbols. */
1655 tmp_command
= (char *) alloca (point
+ 1);
1658 strncpy (tmp_command
, line_buffer
, point
);
1659 tmp_command
[point
] = '\0';
1660 /* Since text always contains some number of characters leading up
1661 to point, we can find the equivalent position in tmp_command
1662 by subtracting that many characters from the end of tmp_command. */
1663 word
= tmp_command
+ point
- strlen (text
);
1667 /* An empty line we want to consider ambiguous; that is, it
1668 could be any command. */
1669 c
= (struct cmd_list_element
*) -1;
1674 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1677 /* Move p up to the next interesting thing. */
1678 while (*p
== ' ' || *p
== '\t')
1685 /* It is an unrecognized command. So there are no
1686 possible completions. */
1689 else if (c
== (struct cmd_list_element
*) -1)
1693 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1694 doesn't advance over that thing itself. Do so now. */
1696 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1698 if (q
!= tmp_command
+ point
)
1700 /* There is something beyond the ambiguous
1701 command, so there are no possible completions. For
1702 example, "info t " or "info t foo" does not complete
1703 to anything, because "info t" can be "info target" or
1709 /* We're trying to complete on the command which was ambiguous.
1710 This we can deal with. */
1713 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1718 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1720 /* Insure that readline does the right thing with respect to
1721 inserting quotes. */
1722 rl_completer_word_break_characters
=
1723 gdb_completer_command_word_break_characters
;
1728 /* We've recognized a full command. */
1730 if (p
== tmp_command
+ point
)
1732 /* There is no non-whitespace in the line beyond the command. */
1734 if (p
[-1] == ' ' || p
[-1] == '\t')
1736 /* The command is followed by whitespace; we need to complete
1737 on whatever comes after command. */
1740 /* It is a prefix command; what comes after it is
1741 a subcommand (e.g. "info "). */
1742 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1744 /* Insure that readline does the right thing
1745 with respect to inserting quotes. */
1746 rl_completer_word_break_characters
=
1747 gdb_completer_command_word_break_characters
;
1751 list
= complete_on_enum (c
->enums
, p
, word
);
1752 rl_completer_word_break_characters
=
1753 gdb_completer_command_word_break_characters
;
1757 /* It is a normal command; what comes after it is
1758 completed by the command's completer function. */
1759 list
= (*c
->completer
) (p
, word
);
1764 /* The command is not followed by whitespace; we need to
1765 complete on the command itself. e.g. "p" which is a
1766 command itself but also can complete to "print", "ptype"
1770 /* Find the command we are completing on. */
1772 while (q
> tmp_command
)
1774 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1780 list
= complete_on_cmdlist (result_list
, q
, word
);
1782 /* Insure that readline does the right thing
1783 with respect to inserting quotes. */
1784 rl_completer_word_break_characters
=
1785 gdb_completer_command_word_break_characters
;
1790 /* There is non-whitespace beyond the command. */
1792 if (c
->prefixlist
&& !c
->allow_unknown
)
1794 /* It is an unrecognized subcommand of a prefix command,
1795 e.g. "info adsfkdj". */
1800 list
= complete_on_enum (c
->enums
, p
, word
);
1804 /* It is a normal command. */
1805 list
= (*c
->completer
) (p
, word
);
1811 /* If we found a list of potential completions during initialization then
1812 dole them out one at a time. The vector of completions is NULL
1813 terminated, so after returning the last one, return NULL (and continue
1814 to do so) each time we are called after that, until a new list is
1819 output
= list
[index
];
1827 /* Can't do this because readline hasn't yet checked the word breaks
1828 for figuring out whether to insert a quote. */
1830 /* Make sure the word break characters are set back to normal for the
1831 next time that readline tries to complete something. */
1832 rl_completer_word_break_characters
=
1833 gdb_completer_word_break_characters
;
1839 /* Line completion interface function for readline. */
1842 readline_line_completion_function (text
, matches
)
1846 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1849 /* Skip over a possibly quoted word (as defined by the quote characters
1850 and word break characters the completer uses). Returns pointer to the
1851 location after the "word". */
1857 char quote_char
= '\0';
1860 for (scan
= str
; *scan
!= '\0'; scan
++)
1862 if (quote_char
!= '\0')
1864 /* Ignore everything until the matching close quote char */
1865 if (*scan
== quote_char
)
1867 /* Found matching close quote. */
1872 else if (strchr (gdb_completer_quote_characters
, *scan
))
1874 /* Found start of a quoted string. */
1877 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1891 #if STOP_SIGNAL == SIGTSTP
1892 signal (SIGTSTP
, SIG_DFL
);
1894 kill (getpid (), SIGTSTP
);
1895 signal (SIGTSTP
, stop_sig
);
1897 signal (STOP_SIGNAL
, stop_sig
);
1899 printf_unfiltered ("%s", prompt
);
1900 gdb_flush (gdb_stdout
);
1902 /* Forget about any previous command -- null line now will do nothing. */
1905 #endif /* STOP_SIGNAL */
1907 /* Initialize signal handlers. */
1917 signal (SIGINT
, request_quit
);
1919 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1920 to the inferior and breakpoints will be ignored. */
1922 signal (SIGTRAP
, SIG_DFL
);
1925 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1926 passed to the inferior, which we don't want. It would be
1927 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1928 on BSD4.3 systems using vfork, that can affect the
1929 GDB process as well as the inferior (the signal handling tables
1930 might be in memory, shared between the two). Since we establish
1931 a handler for SIGQUIT, when we call exec it will set the signal
1932 to SIG_DFL for us. */
1933 signal (SIGQUIT
, do_nothing
);
1935 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1936 signal (SIGHUP
, disconnect
);
1938 signal (SIGFPE
, float_handler
);
1940 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1941 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1945 /* Read one line from the command input stream `instream'
1946 into the local static buffer `linebuffer' (whose current length
1948 The buffer is made bigger as necessary.
1949 Returns the address of the start of the line.
1951 NULL is returned for end of file.
1953 *If* the instream == stdin & stdin is a terminal, the line read
1954 is copied into the file line saver (global var char *line,
1955 length linesize) so that it can be duplicated.
1957 This routine either uses fancy command line editing or
1958 simple input as the user has requested. */
1961 command_line_input (prrompt
, repeat
, annotation_suffix
)
1964 char *annotation_suffix
;
1966 static char *linebuffer
= 0;
1967 static unsigned linelength
= 0;
1971 char *local_prompt
= prrompt
;
1975 /* The annotation suffix must be non-NULL. */
1976 if (annotation_suffix
== NULL
)
1977 annotation_suffix
= "";
1979 if (annotation_level
> 1 && instream
== stdin
)
1981 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1982 + strlen (annotation_suffix
) + 40);
1983 if (prrompt
== NULL
)
1984 local_prompt
[0] = '\0';
1986 strcpy (local_prompt
, prrompt
);
1987 strcat (local_prompt
, "\n\032\032");
1988 strcat (local_prompt
, annotation_suffix
);
1989 strcat (local_prompt
, "\n");
1992 if (linebuffer
== 0)
1995 linebuffer
= (char *) xmalloc (linelength
);
2000 /* Control-C quits instantly if typed while in this loop
2001 since it should not wait until the user types a newline. */
2005 signal (STOP_SIGNAL
, stop_sig
);
2010 /* Make sure that all output has been output. Some machines may let
2011 you get away with leaving out some of the gdb_flush, but not all. */
2013 gdb_flush (gdb_stdout
);
2014 gdb_flush (gdb_stderr
);
2016 if (source_file_name
!= NULL
)
2018 ++source_line_number
;
2019 sprintf (source_error
,
2020 "%s%s:%d: Error in sourced command file:\n",
2023 source_line_number
);
2024 error_pre_print
= source_error
;
2027 if (annotation_level
> 1 && instream
== stdin
)
2029 printf_unfiltered ("\n\032\032pre-");
2030 printf_unfiltered (annotation_suffix
);
2031 printf_unfiltered ("\n");
2034 /* Don't use fancy stuff if not talking to stdin. */
2035 if (readline_hook
&& instream
== NULL
)
2037 rl
= (*readline_hook
) (local_prompt
);
2039 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2041 rl
= readline (local_prompt
);
2045 rl
= gdb_readline (local_prompt
);
2048 if (annotation_level
> 1 && instream
== stdin
)
2050 printf_unfiltered ("\n\032\032post-");
2051 printf_unfiltered (annotation_suffix
);
2052 printf_unfiltered ("\n");
2055 if (!rl
|| rl
== (char *) EOF
)
2060 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2062 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2063 nline
= (char *) xrealloc (linebuffer
, linelength
);
2064 p
+= nline
- linebuffer
;
2068 /* Copy line. Don't copy null at end. (Leaves line alone
2069 if this was just a newline) */
2073 free (rl
); /* Allocated in readline. */
2075 if (p
== linebuffer
|| *(p
- 1) != '\\')
2078 p
--; /* Put on top of '\'. */
2079 local_prompt
= (char *) 0;
2084 signal (STOP_SIGNAL
, SIG_DFL
);
2091 #define SERVER_COMMAND_LENGTH 7
2093 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2094 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2097 /* Note that we don't set `line'. Between this and the check in
2098 dont_repeat, this insures that repeating will still do the
2101 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2104 /* Do history expansion if that is wished. */
2105 if (history_expansion_p
&& instream
== stdin
2106 && ISATTY (instream
))
2108 char *history_value
;
2111 *p
= '\0'; /* Insert null now. */
2112 expanded
= history_expand (linebuffer
, &history_value
);
2115 /* Print the changes. */
2116 printf_unfiltered ("%s\n", history_value
);
2118 /* If there was an error, call this function again. */
2121 free (history_value
);
2122 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2124 if (strlen (history_value
) > linelength
)
2126 linelength
= strlen (history_value
) + 1;
2127 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2129 strcpy (linebuffer
, history_value
);
2130 p
= linebuffer
+ strlen(linebuffer
);
2131 free (history_value
);
2135 /* If we just got an empty line, and that is supposed
2136 to repeat the previous command, return the value in the
2138 if (repeat
&& p
== linebuffer
)
2140 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2146 /* Add line to history if appropriate. */
2147 if (instream
== stdin
2148 && ISATTY (stdin
) && *linebuffer
)
2149 add_history (linebuffer
);
2151 /* Note: lines consisting solely of comments are added to the command
2152 history. This is useful when you type a command, and then
2153 realize you don't want to execute it quite yet. You can comment
2154 out the command and then later fetch it from the value history
2155 and remove the '#'. The kill ring is probably better, but some
2156 people are in the habit of commenting things out. */
2158 *p1
= '\0'; /* Found a comment. */
2160 /* Save into global buffer if appropriate. */
2163 if (linelength
> linesize
)
2165 line
= xrealloc (line
, linelength
);
2166 linesize
= linelength
;
2168 strcpy (line
, linebuffer
);
2176 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2177 code bodies. This is typically used when we encounter an "else"
2178 clause for an "if" command. */
2181 realloc_body_list (command
, new_length
)
2182 struct command_line
*command
;
2186 struct command_line
**body_list
;
2188 n
= command
->body_count
;
2190 /* Nothing to do? */
2191 if (new_length
<= n
)
2194 body_list
= (struct command_line
**)
2195 xmalloc (sizeof (struct command_line
*) * new_length
);
2197 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2199 free (command
->body_list
);
2200 command
->body_list
= body_list
;
2201 command
->body_count
= new_length
;
2204 /* Read one line from the input stream. If the command is an "else" or
2205 "end", return such an indication to the caller. */
2207 static enum misc_command_type
2208 read_next_line (command
)
2209 struct command_line
**command
;
2211 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2214 if (control_level
>= 254)
2215 error ("Control nesting too deep!\n");
2217 /* Set a prompt based on the nesting of the control commands. */
2218 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2220 for (i
= 0; i
< control_level
; i
++)
2221 control_prompt
[i
] = ' ';
2222 control_prompt
[i
] = '>';
2223 control_prompt
[i
+1] = '\0';
2224 prompt_ptr
= (char *)&control_prompt
[0];
2229 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2231 /* Not sure what to do here. */
2235 /* Strip leading and trailing whitespace. */
2236 while (*p
== ' ' || *p
== '\t')
2239 p1
= p
+ strlen (p
);
2240 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2243 /* Blanks and comments don't really do anything, but we need to
2244 distinguish them from else, end and other commands which can be
2246 if (p1
== p
|| p
[0] == '#')
2249 /* Is this the end of a simple, while, or if control structure? */
2250 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2253 /* Is the else clause of an if control structure? */
2254 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2255 return else_command
;
2257 /* Check for while, if, break, continue, etc and build a new command
2258 line structure for them. */
2259 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2260 *command
= build_command_line (while_control
, p
+ 6);
2261 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2262 *command
= build_command_line (if_control
, p
+ 3);
2263 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2265 *command
= (struct command_line
*)
2266 xmalloc (sizeof (struct command_line
));
2267 (*command
)->next
= NULL
;
2268 (*command
)->line
= NULL
;
2269 (*command
)->control_type
= break_control
;
2270 (*command
)->body_count
= 0;
2271 (*command
)->body_list
= NULL
;
2273 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2275 *command
= (struct command_line
*)
2276 xmalloc (sizeof (struct command_line
));
2277 (*command
)->next
= NULL
;
2278 (*command
)->line
= NULL
;
2279 (*command
)->control_type
= continue_control
;
2280 (*command
)->body_count
= 0;
2281 (*command
)->body_list
= NULL
;
2285 /* A normal command. */
2286 *command
= (struct command_line
*)
2287 xmalloc (sizeof (struct command_line
));
2288 (*command
)->next
= NULL
;
2289 (*command
)->line
= savestring (p
, p1
- p
);
2290 (*command
)->control_type
= simple_control
;
2291 (*command
)->body_count
= 0;
2292 (*command
)->body_list
= NULL
;
2295 /* Nothing special. */
2299 /* Recursively read in the control structures and create a command_line
2300 structure from them.
2302 The parent_control parameter is the control structure in which the
2303 following commands are nested. */
2305 static enum command_control_type
2306 recurse_read_control_structure (current_cmd
)
2307 struct command_line
*current_cmd
;
2309 int current_body
, i
;
2310 enum misc_command_type val
;
2311 enum command_control_type ret
;
2312 struct command_line
**body_ptr
, *child_tail
, *next
;
2317 /* Sanity checks. */
2318 if (current_cmd
->control_type
== simple_control
)
2320 error ("Recursed on a simple control type\n");
2321 return invalid_control
;
2324 if (current_body
> current_cmd
->body_count
)
2326 error ("Allocated body is smaller than this command type needs\n");
2327 return invalid_control
;
2330 /* Read lines from the input stream and build control structures. */
2336 val
= read_next_line (&next
);
2338 /* Just skip blanks and comments. */
2339 if (val
== nop_command
)
2342 if (val
== end_command
)
2344 if (current_cmd
->control_type
== while_control
2345 || current_cmd
->control_type
== if_control
)
2347 /* Success reading an entire control structure. */
2348 ret
= simple_control
;
2353 ret
= invalid_control
;
2358 /* Not the end of a control structure. */
2359 if (val
== else_command
)
2361 if (current_cmd
->control_type
== if_control
2362 && current_body
== 1)
2364 realloc_body_list (current_cmd
, 2);
2371 ret
= invalid_control
;
2378 child_tail
->next
= next
;
2382 body_ptr
= current_cmd
->body_list
;
2383 for (i
= 1; i
< current_body
; i
++)
2392 /* If the latest line is another control structure, then recurse
2394 if (next
->control_type
== while_control
2395 || next
->control_type
== if_control
)
2398 ret
= recurse_read_control_structure (next
);
2401 if (ret
!= simple_control
)
2411 /* Read lines from the input stream and accumulate them in a chain of
2412 struct command_line's, which is then returned. For input from a
2413 terminal, the special command "end" is used to mark the end of the
2414 input, and is not included in the returned chain of commands. */
2416 #define END_MESSAGE "End with a line saying just \"end\"."
2418 struct command_line
*
2419 read_command_lines (prompt
, from_tty
)
2423 struct command_line
*head
, *tail
, *next
;
2424 struct cleanup
*old_chain
;
2425 enum command_control_type ret
;
2426 enum misc_command_type val
;
2428 if (readline_begin_hook
)
2430 /* Note - intentional to merge messages with no newline */
2431 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2433 else if (from_tty
&& input_from_terminal_p ())
2435 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2436 gdb_flush (gdb_stdout
);
2444 val
= read_next_line (&next
);
2446 /* Ignore blank lines or comments. */
2447 if (val
== nop_command
)
2450 if (val
== end_command
)
2452 ret
= simple_control
;
2456 if (val
!= ok_command
)
2458 ret
= invalid_control
;
2462 if (next
->control_type
== while_control
2463 || next
->control_type
== if_control
)
2466 ret
= recurse_read_control_structure (next
);
2469 if (ret
== invalid_control
)
2480 old_chain
= make_cleanup (free_command_lines
, &head
);
2489 if (ret
!= invalid_control
)
2491 discard_cleanups (old_chain
);
2494 do_cleanups (old_chain
);
2497 if (readline_end_hook
)
2499 (*readline_end_hook
) ();
2504 /* Free a chain of struct command_line's. */
2507 free_command_lines (lptr
)
2508 struct command_line
**lptr
;
2510 register struct command_line
*l
= *lptr
;
2511 register struct command_line
*next
;
2512 struct command_line
**blist
;
2517 if (l
->body_count
> 0)
2519 blist
= l
->body_list
;
2520 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2521 free_command_lines (blist
);
2530 /* Add an element to the list of info subcommands. */
2533 add_info (name
, fun
, doc
)
2535 void (*fun
) PARAMS ((char *, int));
2538 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2541 /* Add an alias to the list of info subcommands. */
2544 add_info_alias (name
, oldname
, abbrev_flag
)
2549 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2552 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2553 Therefore, its own definition is called only for "info" with no args. */
2557 info_command (arg
, from_tty
)
2561 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2562 help_list (infolist
, "info ", -1, gdb_stdout
);
2565 /* The "complete" command is used by Emacs to implement completion. */
2569 complete_command (arg
, from_tty
)
2581 argpoint
= strlen (arg
);
2583 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2585 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2587 printf_unfiltered ("%s\n", completion
);
2592 /* The "show" command with no arguments shows all the settings. */
2596 show_command (arg
, from_tty
)
2600 cmd_show_list (showlist
, from_tty
, "");
2603 /* Add an element to the list of commands. */
2606 add_com (name
, class, fun
, doc
)
2608 enum command_class
class;
2609 void (*fun
) PARAMS ((char *, int));
2612 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2615 /* Add an alias or abbreviation command to the list of commands. */
2618 add_com_alias (name
, oldname
, class, abbrev_flag
)
2621 enum command_class
class;
2624 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2631 error ("Argument required (%s).", why
);
2636 help_command (command
, from_tty
)
2638 int from_tty
; /* Ignored */
2640 help_cmd (command
, gdb_stdout
);
2644 validate_comname (comname
)
2650 error_no_arg ("name of command to define");
2655 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2656 error ("Junk in argument list: \"%s\"", p
);
2661 /* This is just a placeholder in the command data structures. */
2663 user_defined_command (ignore
, from_tty
)
2670 define_command (comname
, from_tty
)
2674 register struct command_line
*cmds
;
2675 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2676 char *tem
= comname
;
2678 #define HOOK_STRING "hook-"
2681 validate_comname (comname
);
2683 /* Look it up, and verify that we got an exact match. */
2684 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2685 if (c
&& !STREQ (comname
, c
->name
))
2690 if (c
->class == class_user
|| c
->class == class_alias
)
2691 tem
= "Redefine command \"%s\"? ";
2693 tem
= "Really redefine built-in command \"%s\"? ";
2694 if (!query (tem
, c
->name
))
2695 error ("Command \"%s\" not redefined.", c
->name
);
2698 /* If this new command is a hook, then mark the command which it
2699 is hooking. Note that we allow hooking `help' commands, so that
2700 we can hook the `stop' pseudo-command. */
2702 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2704 /* Look up cmd it hooks, and verify that we got an exact match. */
2705 tem
= comname
+HOOK_LEN
;
2706 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2707 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2711 warning ("Your new `%s' command does not hook any existing command.",
2713 if (!query ("Proceed? "))
2714 error ("Not confirmed.");
2718 comname
= savestring (comname
, strlen (comname
));
2720 /* If the rest of the commands will be case insensitive, this one
2721 should behave in the same manner. */
2722 for (tem
= comname
; *tem
; tem
++)
2723 if (isupper(*tem
)) *tem
= tolower(*tem
);
2726 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2727 cmds
= read_command_lines (tmpbuf
, from_tty
);
2729 if (c
&& c
->class == class_user
)
2730 free_command_lines (&c
->user_commands
);
2732 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2733 (c
&& c
->class == class_user
)
2734 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2735 newc
->user_commands
= cmds
;
2737 /* If this new command is a hook, then mark both commands as being
2741 hookc
->hook
= newc
; /* Target gets hooked. */
2742 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2747 document_command (comname
, from_tty
)
2751 struct command_line
*doclines
;
2752 register struct cmd_list_element
*c
;
2753 char *tem
= comname
;
2756 validate_comname (comname
);
2758 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2760 if (c
->class != class_user
)
2761 error ("Command \"%s\" is built-in.", comname
);
2763 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2764 doclines
= read_command_lines (tmpbuf
, from_tty
);
2766 if (c
->doc
) free (c
->doc
);
2769 register struct command_line
*cl1
;
2770 register int len
= 0;
2772 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2773 len
+= strlen (cl1
->line
) + 1;
2775 c
->doc
= (char *) xmalloc (len
+ 1);
2778 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2780 strcat (c
->doc
, cl1
->line
);
2782 strcat (c
->doc
, "\n");
2786 free_command_lines (&doclines
);
2790 print_gdb_version (stream
)
2793 /* From GNU coding standards, first line is meant to be easy for a
2794 program to parse, and is just canonical program name and version
2795 number, which starts after last space. */
2797 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
2799 /* Second line is a copyright notice. */
2801 fprintf_filtered (stream
, "Copyright 1997 Free Software Foundation, Inc.\n");
2803 /* Following the copyright is a brief statement that the program is
2804 free software, that users are free to copy and change it on
2805 certain conditions, that it is covered by the GNU GPL, and that
2806 there is no warranty. */
2808 fprintf_filtered (stream
, "\
2809 GDB is free software, covered by the GNU General Public License, and you are\n\
2810 welcome to change it and/or distribute copies of it under certain conditions.\n\
2811 Type \"show copying\" to see the conditions.\n\
2812 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2814 /* After the required info we print the configuration information. */
2816 fprintf_filtered (stream
, "This GDB was configured as \"");
2817 if (!STREQ (host_name
, target_name
))
2819 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
2823 fprintf_filtered (stream
, "%s", host_name
);
2825 fprintf_filtered (stream
, "\".");
2830 show_version (args
, from_tty
)
2835 print_gdb_version (gdb_stdout
);
2836 printf_filtered ("\n");
2840 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2846 printf_unfiltered ("%s", prompt
);
2847 gdb_flush (gdb_stdout
);
2851 quit_command (args
, from_tty
)
2857 /* An optional expression may be used to cause gdb to terminate with the
2858 value of that expression. */
2861 value_ptr val
= parse_and_eval (args
);
2863 exit_code
= (int) value_as_long (val
);
2866 if (inferior_pid
!= 0 && target_has_execution
)
2870 if (query ("The program is running. Quit anyway (and detach it)? "))
2871 target_detach (args
, from_tty
);
2873 error ("Not confirmed.");
2877 if (query ("The program is running. Quit anyway (and kill it)? "))
2880 error ("Not confirmed.");
2883 /* UDI wants this, to kill the TIP. */
2886 /* Save the history information if it is appropriate to do so. */
2887 if (write_history_p
&& history_filename
)
2888 write_history (history_filename
);
2890 do_final_cleanups(ALL_CLEANUPS
); /* Do any final cleanups before exiting */
2895 /* Returns whether GDB is running on a terminal and whether the user
2896 desires that questions be asked of them on that terminal. */
2899 input_from_terminal_p ()
2901 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2906 pwd_command (args
, from_tty
)
2910 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2911 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2913 if (!STREQ (gdb_dirbuf
, current_directory
))
2914 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2915 current_directory
, gdb_dirbuf
);
2917 printf_unfiltered ("Working directory %s.\n", current_directory
);
2921 cd_command (dir
, from_tty
)
2926 /* Found something other than leading repetitions of "/..". */
2927 int found_real_path
;
2930 /* If the new directory is absolute, repeat is a no-op; if relative,
2931 repeat might be useful but is more likely to be a mistake. */
2935 error_no_arg ("new working directory");
2937 dir
= tilde_expand (dir
);
2938 make_cleanup (free
, dir
);
2940 if (chdir (dir
) < 0)
2941 perror_with_name (dir
);
2944 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2946 current_directory
= dir
;
2949 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2950 current_directory
= concat (current_directory
, dir
, NULL
);
2952 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2956 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2958 found_real_path
= 0;
2959 for (p
= current_directory
; *p
;)
2961 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2963 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2964 && (p
[3] == 0 || SLASH_P (p
[3])))
2966 if (found_real_path
)
2968 /* Search backwards for the directory just before the "/.."
2969 and obliterate it and the "/..". */
2971 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2974 if (q
== current_directory
)
2975 /* current_directory is
2976 a relative pathname ("can't happen"--leave it alone). */
2980 strcpy (q
- 1, p
+ 3);
2985 /* We are dealing with leading repetitions of "/..", for example
2986 "/../..", which is the Mach super-root. */
2991 found_real_path
= 1;
2996 forget_cached_source_info ();
2999 pwd_command ((char *) 0, 1);
3002 struct source_cleanup_lines_args
{
3005 char *old_pre_error
;
3006 char *old_error_pre_print
;
3010 source_cleanup_lines (args
)
3013 struct source_cleanup_lines_args
*p
=
3014 (struct source_cleanup_lines_args
*)args
;
3015 source_line_number
= p
->old_line
;
3016 source_file_name
= p
->old_file
;
3017 source_pre_error
= p
->old_pre_error
;
3018 error_pre_print
= p
->old_error_pre_print
;
3023 source_command (args
, from_tty
)
3028 struct cleanup
*old_cleanups
;
3030 struct source_cleanup_lines_args old_lines
;
3035 error ("source command requires pathname of file to source.");
3038 file
= tilde_expand (file
);
3039 old_cleanups
= make_cleanup (free
, file
);
3041 stream
= fopen (file
, FOPEN_RT
);
3044 perror_with_name (file
);
3048 make_cleanup (fclose
, stream
);
3050 old_lines
.old_line
= source_line_number
;
3051 old_lines
.old_file
= source_file_name
;
3052 old_lines
.old_pre_error
= source_pre_error
;
3053 old_lines
.old_error_pre_print
= error_pre_print
;
3054 make_cleanup (source_cleanup_lines
, &old_lines
);
3055 source_line_number
= 0;
3056 source_file_name
= file
;
3057 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3058 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3059 make_cleanup (free
, source_pre_error
);
3060 /* This will get set every time we read a line. So it won't stay "" for
3062 error_pre_print
= "";
3064 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3065 if (source_error_allocated
< needed_length
)
3067 source_error_allocated
*= 2;
3068 if (source_error_allocated
< needed_length
)
3069 source_error_allocated
= needed_length
;
3070 if (source_error
== NULL
)
3071 source_error
= xmalloc (source_error_allocated
);
3073 source_error
= xrealloc (source_error
, source_error_allocated
);
3076 read_command_file (stream
);
3078 do_cleanups (old_cleanups
);
3083 echo_command (text
, from_tty
)
3091 while ((c
= *p
++) != '\0')
3095 /* \ at end of argument is used after spaces
3096 so they won't be lost. */
3100 c
= parse_escape (&p
);
3102 printf_filtered ("%c", c
);
3105 printf_filtered ("%c", c
);
3108 /* Force this output to appear now. */
3110 gdb_flush (gdb_stdout
);
3115 dont_repeat_command (ignored
, from_tty
)
3119 *line
= 0; /* Can't call dont_repeat here because we're not
3120 necessarily reading from stdin. */
3123 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3125 /* Functions to manipulate the endianness of the target. */
3127 #ifndef TARGET_BYTE_ORDER_DEFAULT
3128 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3131 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3133 static int target_byte_order_auto
= 1;
3135 /* Called if the user enters ``set endian'' without an argument. */
3137 set_endian (args
, from_tty
)
3141 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3142 show_endian (args
, from_tty
);
3145 /* Called by ``set endian big''. */
3147 set_endian_big (args
, from_tty
)
3151 target_byte_order
= BIG_ENDIAN
;
3152 target_byte_order_auto
= 0;
3155 /* Called by ``set endian little''. */
3157 set_endian_little (args
, from_tty
)
3161 target_byte_order
= LITTLE_ENDIAN
;
3162 target_byte_order_auto
= 0;
3165 /* Called by ``set endian auto''. */
3167 set_endian_auto (args
, from_tty
)
3171 target_byte_order_auto
= 1;
3174 /* Called by ``show endian''. */
3176 show_endian (args
, from_tty
)
3181 (target_byte_order_auto
3182 ? "The target endianness is set automatically (currently %s endian)\n"
3183 : "The target is assumed to be %s endian\n");
3184 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3187 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3189 /* Set the endianness from a BFD. */
3191 set_endian_from_file (abfd
)
3194 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3197 if (bfd_big_endian (abfd
))
3200 want
= LITTLE_ENDIAN
;
3201 if (target_byte_order_auto
)
3202 target_byte_order
= want
;
3203 else if (target_byte_order
!= want
)
3204 warning ("%s endian file does not match %s endian target.",
3205 want
== BIG_ENDIAN
? "big" : "little",
3206 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3208 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3210 if (bfd_big_endian (abfd
)
3211 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3212 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3213 warning ("%s endian file does not match %s endian target.",
3214 bfd_big_endian (abfd
) ? "big" : "little",
3215 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3217 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3220 /* Functions to manipulate command line editing control variables. */
3222 /* Number of commands to print in each call to show_commands. */
3223 #define Hist_print 10
3225 show_commands (args
, from_tty
)
3229 /* Index for history commands. Relative to history_base. */
3232 /* Number of the history entry which we are planning to display next.
3233 Relative to history_base. */
3236 /* The first command in the history which doesn't exist (i.e. one more
3237 than the number of the last command). Relative to history_base. */
3240 extern HIST_ENTRY
*history_get
PARAMS ((int));
3242 /* Print out some of the commands from the command history. */
3243 /* First determine the length of the history list. */
3244 hist_len
= history_size
;
3245 for (offset
= 0; offset
< history_size
; offset
++)
3247 if (!history_get (history_base
+ offset
))
3256 if (args
[0] == '+' && args
[1] == '\0')
3257 /* "info editing +" should print from the stored position. */
3260 /* "info editing <exp>" should print around command number <exp>. */
3261 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3263 /* "show commands" means print the last Hist_print commands. */
3266 num
= hist_len
- Hist_print
;
3272 /* If there are at least Hist_print commands, we want to display the last
3273 Hist_print rather than, say, the last 6. */
3274 if (hist_len
- num
< Hist_print
)
3276 num
= hist_len
- Hist_print
;
3281 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3283 printf_filtered ("%5d %s\n", history_base
+ offset
,
3284 (history_get (history_base
+ offset
))->line
);
3287 /* The next command we want to display is the next one that we haven't
3291 /* If the user repeats this command with return, it should do what
3292 "show commands +" does. This is unnecessary if arg is null,
3293 because "show commands +" is not useful after "show commands". */
3294 if (from_tty
&& args
)
3301 /* Called by do_setshow_command. */
3304 set_history_size_command (args
, from_tty
, c
)
3307 struct cmd_list_element
*c
;
3309 if (history_size
== INT_MAX
)
3310 unstifle_history ();
3311 else if (history_size
>= 0)
3312 stifle_history (history_size
);
3315 history_size
= INT_MAX
;
3316 error ("History size must be non-negative");
3322 set_history (args
, from_tty
)
3326 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3327 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3332 show_history (args
, from_tty
)
3336 cmd_show_list (showhistlist
, from_tty
, "");
3339 int info_verbose
= 0; /* Default verbose msgs off */
3341 /* Called by do_setshow_command. An elaborate joke. */
3344 set_verbose (args
, from_tty
, c
)
3347 struct cmd_list_element
*c
;
3349 char *cmdname
= "verbose";
3350 struct cmd_list_element
*showcmd
;
3352 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3356 c
->doc
= "Set verbose printing of informational messages.";
3357 showcmd
->doc
= "Show verbose printing of informational messages.";
3361 c
->doc
= "Set verbosity.";
3362 showcmd
->doc
= "Show verbosity.";
3367 float_handler (signo
)
3370 /* This message is based on ANSI C, section 4.7. Note that integer
3371 divide by zero causes this, so "float" is a misnomer. */
3372 signal (SIGFPE
, float_handler
);
3373 error ("Erroneous arithmetic operation.");
3385 enablebreaklist
= NULL
;
3389 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3393 showhistlist
= NULL
;
3394 unsethistlist
= NULL
;
3395 #if MAINTENANCE_CMDS
3396 maintenancelist
= NULL
;
3397 maintenanceinfolist
= NULL
;
3398 maintenanceprintlist
= NULL
;
3400 setprintlist
= NULL
;
3401 showprintlist
= NULL
;
3402 setchecklist
= NULL
;
3403 showchecklist
= NULL
;
3406 /* Init the history buffer. Note that we are called after the init file(s)
3407 * have been read so that the user can change the history file via his
3408 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3409 * overrides all of this.
3417 tmpenv
= getenv ("HISTSIZE");
3419 history_size
= atoi (tmpenv
);
3420 else if (!history_size
)
3423 stifle_history (history_size
);
3425 tmpenv
= getenv ("GDBHISTFILE");
3427 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3428 else if (!history_filename
) {
3429 /* We include the current directory so that if the user changes
3430 directories the file written will be the same as the one
3432 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3434 read_history (history_filename
);
3440 struct cmd_list_element
*c
;
3442 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3444 add_prefix_cmd ("endian", class_support
, set_endian
,
3445 "Set endianness of target.",
3446 &endianlist
, "set endian ", 0, &setlist
);
3447 add_cmd ("big", class_support
, set_endian_big
,
3448 "Set target as being big endian.", &endianlist
);
3449 add_cmd ("little", class_support
, set_endian_little
,
3450 "Set target as being little endian.", &endianlist
);
3451 add_cmd ("auto", class_support
, set_endian_auto
,
3452 "Select target endianness automatically.", &endianlist
);
3453 add_cmd ("endian", class_support
, show_endian
,
3454 "Show endianness of target.", &showlist
);
3456 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3458 #ifdef DEFAULT_PROMPT
3459 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3461 prompt
= savestring ("(gdb) ", 6);
3464 /* Set the important stuff up for command editing. */
3465 command_editing_p
= 1;
3466 history_expansion_p
= 0;
3467 write_history_p
= 0;
3469 /* Setup important stuff for command line editing. */
3470 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3471 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3472 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3473 rl_readline_name
= "gdb";
3475 /* Define the classes of commands.
3476 They will appear in the help list in the reverse of this order. */
3478 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3479 "Maintenance commands.\n\
3480 Some gdb commands are provided just for use by gdb maintainers.\n\
3481 These commands are subject to frequent change, and may not be as\n\
3482 well documented as user commands.",
3484 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3485 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3486 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3487 The commands in this class are those defined by the user.\n\
3488 Use the \"define\" command to define a command.", &cmdlist
);
3489 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3490 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3491 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3492 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3493 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3494 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3495 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3496 counting from zero for the innermost (currently executing) frame.\n\n\
3497 At any time gdb identifies one frame as the \"selected\" frame.\n\
3498 Variable lookups are done with respect to the selected frame.\n\
3499 When the program being debugged stops, gdb selects the innermost frame.\n\
3500 The commands below can be used to select other frames by number or address.",
3502 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3504 add_com ("pwd", class_files
, pwd_command
,
3505 "Print working directory. This is used for your program as well.");
3506 c
= add_cmd ("cd", class_files
, cd_command
,
3507 "Set working directory to DIR for debugger and program being debugged.\n\
3508 The change does not take effect for the program being debugged\n\
3509 until the next time it is started.", &cmdlist
);
3510 c
->completer
= filename_completer
;
3513 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3518 add_com ("echo", class_support
, echo_command
,
3519 "Print a constant string. Give string as argument.\n\
3520 C escape sequences may be used in the argument.\n\
3521 No newline is added at the end of the argument;\n\
3522 use \"\\n\" if you want a newline to be printed.\n\
3523 Since leading and trailing whitespace are ignored in command arguments,\n\
3524 if you want to print some you must use \"\\\" before leading whitespace\n\
3525 to be printed or after trailing whitespace.");
3526 add_com ("document", class_support
, document_command
,
3527 "Document a user-defined command.\n\
3528 Give command name as argument. Give documentation on following lines.\n\
3529 End with a line of just \"end\".");
3530 add_com ("define", class_support
, define_command
,
3531 "Define a new command name. Command name is argument.\n\
3532 Definition appears on following lines, one command per line.\n\
3533 End with a line of just \"end\".\n\
3534 Use the \"document\" command to give documentation for the new command.\n\
3535 Commands defined in this way may have up to ten arguments.");
3538 c
= add_cmd ("source", class_support
, source_command
,
3539 "Read commands from a file named FILE.\n\
3540 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3541 when gdb is started.", &cmdlist
);
3543 /* Punt file name, we can't help it easily. */
3544 c
= add_cmd ("source", class_support
, source_command
,
3545 "Read commands from a file named FILE.\n\
3546 Note that the file \".gdbinit\" is read automatically in this way\n\
3547 when gdb is started.", &cmdlist
);
3549 c
->completer
= filename_completer
;
3551 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3552 add_com ("help", class_support
, help_command
, "Print list of commands.");
3553 add_com_alias ("q", "quit", class_support
, 1);
3554 add_com_alias ("h", "help", class_support
, 1);
3556 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3557 Primarily used inside of user-defined commands that should not be repeated when\n\
3560 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3563 add_show_from_set (c
, &showlist
);
3564 c
->function
.sfunc
= set_verbose
;
3565 set_verbose (NULL
, 0, c
);
3568 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3569 "Set editing of command lines as they are typed.\n\
3570 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
3571 Without an argument, command line editing is enabled. To edit, use\n\
3572 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3575 add_prefix_cmd ("history", class_support
, set_history
,
3576 "Generic command for setting command history parameters.",
3577 &sethistlist
, "set history ", 0, &setlist
);
3578 add_prefix_cmd ("history", class_support
, show_history
,
3579 "Generic command for showing command history parameters.",
3580 &showhistlist
, "show history ", 0, &showlist
);
3583 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3584 "Set history expansion on command input.\n\
3585 Without an argument, history expansion is enabled.", &sethistlist
),
3589 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3590 "Set saving of the history record on exit.\n\
3591 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
3592 Without an argument, saving is enabled.", &sethistlist
),
3595 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3596 "Set the size of the command history, \n\
3597 ie. the number of previous commands to keep a record of.", &sethistlist
);
3598 add_show_from_set (c
, &showhistlist
);
3599 c
->function
.sfunc
= set_history_size_command
;
3602 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3603 "Set the filename in which to record the command history\n\
3604 (the list of previous commands of which a record is kept).", &sethistlist
),
3608 (add_set_cmd ("confirm", class_support
, var_boolean
,
3610 "Set whether to confirm potentially dangerous operations.",
3614 add_prefix_cmd ("info", class_info
, info_command
,
3615 "Generic command for showing things about the program being debugged.",
3616 &infolist
, "info ", 0, &cmdlist
);
3617 add_com_alias ("i", "info", class_info
, 1);
3619 add_com ("complete", class_obscure
, complete_command
,
3620 "List the completions for the rest of the line as a command.");
3622 add_prefix_cmd ("show", class_info
, show_command
,
3623 "Generic command for showing things about the debugger.",
3624 &showlist
, "show ", 0, &cmdlist
);
3625 /* Another way to get at the same thing. */
3626 add_info ("set", show_command
, "Show all GDB settings.");
3628 add_cmd ("commands", no_class
, show_commands
,
3629 "Show the history of commands you typed.\n\
3630 You can supply a command number to start with, or a `+' to start after\n\
3631 the previous command number shown.",
3634 add_cmd ("version", no_class
, show_version
,
3635 "Show what version of GDB this is.", &showlist
);
3637 add_com ("while", class_support
, while_command
,
3638 "Execute nested commands WHILE the conditional expression is non zero.\n\
3639 The conditional expression must follow the word `while' and must in turn be\n\
3640 followed by a new line. The nested commands must be entered one per line,\n\
3641 and should be terminated by the word `end'.");
3643 add_com ("if", class_support
, if_command
,
3644 "Execute nested commands once IF the conditional expression is non zero.\n\
3645 The conditional expression must follow the word `if' and must in turn be\n\
3646 followed by a new line. The nested commands must be entered one per line,\n\
3647 and should be terminated by the word 'else' or `end'. If an else clause\n\
3648 is used, the same rules apply to its nested commands as to the first ones.");
3650 /* If target is open when baud changes, it doesn't take effect until the
3651 next open (I think, not sure). */
3652 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3653 var_zinteger
, (char *)&baud_rate
,
3654 "Set baud rate for remote serial I/O.\n\
3655 This value is used to set the speed of the serial port when debugging\n\
3656 using remote targets.", &setlist
),
3660 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3661 "Set debugging of remote protocol.\n\
3662 When enabled, each packet sent or received with the remote target\n\
3663 is displayed.", &setlist
),
3667 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3668 "Set timeout limit to wait for target to respond.\n\
3669 This value is used to set the time limit for gdb to wait for a response\n\
3670 from he target.", &setlist
),
3673 c
= add_set_cmd ("annotate", class_obscure
, var_zinteger
,
3674 (char *)&annotation_level
, "Set annotation_level.\n\
3675 0 == normal; 1 == fullname (for use when running under emacs)\n\
3676 2 == output annotated suitably for use by programs that control GDB.",
3678 c
= add_show_from_set (c
, &showlist
);