1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
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 static void set_endian
PARAMS ((char *, int));
113 static void set_endian_big
PARAMS ((char *, int));
115 static void set_endian_little
PARAMS ((char *, int));
117 static void set_endian_auto
PARAMS ((char *, int));
119 static void show_endian
PARAMS ((char *, int));
121 static void set_architecture
PARAMS ((char *, int));
123 static void show_architecture
PARAMS ((char *, int));
125 static void info_architecture
PARAMS ((char *, int));
127 static void show_history
PARAMS ((char *, int));
129 static void set_history
PARAMS ((char *, int));
131 static void set_history_size_command
PARAMS ((char *, int,
132 struct cmd_list_element
*));
134 static void show_commands
PARAMS ((char *, int));
136 static void echo_command
PARAMS ((char *, int));
138 static void pwd_command
PARAMS ((char *, int));
140 static void show_version
PARAMS ((char *, int));
142 static void document_command
PARAMS ((char *, int));
144 static void define_command
PARAMS ((char *, int));
146 static void validate_comname
PARAMS ((char *));
148 static void help_command
PARAMS ((char *, int));
150 static void show_command
PARAMS ((char *, int));
152 static void info_command
PARAMS ((char *, int));
154 static void complete_command
PARAMS ((char *, int));
156 static void do_nothing
PARAMS ((int));
159 static int quit_cover
PARAMS ((char *));
161 static void disconnect
PARAMS ((int));
164 static void source_cleanup
PARAMS ((FILE *));
166 /* If this definition isn't overridden by the header files, assume
167 that isatty and fileno exist on this system. */
169 #define ISATTY(FP) (isatty (fileno (FP)))
172 /* Initialization file name for gdb. This is overridden in some configs. */
174 #ifndef GDBINIT_FILENAME
175 #define GDBINIT_FILENAME ".gdbinit"
177 char gdbinit
[] = GDBINIT_FILENAME
;
179 int inhibit_gdbinit
= 0;
181 /* If nonzero, and GDB has been configured to be able to use windows,
182 attempt to open them upon startup. */
186 /* Version number of GDB, as a string. */
188 extern char *version
;
190 /* Canonical host name as a string. */
192 extern char *host_name
;
194 /* Canonical target name as a string. */
196 extern char *target_name
;
198 extern char lang_frame_mismatch_warn
[]; /* language.c */
200 /* Flag for whether we want all the "from_tty" gubbish printed. */
202 int caution
= 1; /* Default is yes, sigh. */
204 /* Define all cmd_list_elements. */
206 /* Chain containing all defined commands. */
208 struct cmd_list_element
*cmdlist
;
210 /* Chain containing all defined info subcommands. */
212 struct cmd_list_element
*infolist
;
214 /* Chain containing all defined enable subcommands. */
216 struct cmd_list_element
*enablelist
;
218 /* Chain containing all defined disable subcommands. */
220 struct cmd_list_element
*disablelist
;
222 /* Chain containing all defined delete subcommands. */
224 struct cmd_list_element
*deletelist
;
226 /* Chain containing all defined "enable breakpoint" subcommands. */
228 struct cmd_list_element
*enablebreaklist
;
230 /* Chain containing all defined set subcommands */
232 struct cmd_list_element
*setlist
;
234 /* Chain containing all defined unset subcommands */
236 struct cmd_list_element
*unsetlist
;
238 /* Chain containing all defined show subcommands. */
240 struct cmd_list_element
*showlist
;
242 /* Chain containing the \"set endian\" commands. */
244 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 ((char *argv0
));
383 void (*ui_loop_hook
) PARAMS ((int));
386 /* Called instead of command_loop at top level. Can be invoked via
387 return_to_top_level. */
389 void (*command_loop_hook
) PARAMS ((void));
392 /* Called instead of fputs for all output. */
394 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
396 /* Called when the target says something to the host, which may
397 want to appear in a different window. */
399 void (*target_output_hook
) PARAMS ((char *));
401 /* Called from print_frame_info to list the line we stopped in. */
403 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
404 int stopline
, int noerror
));
405 /* Replaces most of query. */
407 int (*query_hook
) PARAMS ((const char *, va_list));
409 /* Replaces most of warning. */
411 void (*warning_hook
) PARAMS ((const char *, va_list));
413 /* Called from gdb_flush to flush output. */
415 void (*flush_hook
) PARAMS ((FILE *stream
));
417 /* These three functions support getting lines of text from the user. They
418 are used in sequence. First readline_begin_hook is called with a text
419 string that might be (for example) a message for the user to type in a
420 sequence of commands to be executed at a breakpoint. If this function
421 calls back to a GUI, it might take this opportunity to pop up a text
422 interaction window with this message. Next, readline_hook is called
423 with a prompt that is emitted prior to collecting the user input.
424 It can be called multiple times. Finally, readline_end_hook is called
425 to notify the GUI that we are done with the interaction window and it
428 void (*readline_begin_hook
) PARAMS ((char *, ...));
429 char * (*readline_hook
) PARAMS ((char *));
430 void (*readline_end_hook
) PARAMS ((void));
432 /* Called as appropriate to notify the interface of the specified breakpoint
435 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
436 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
437 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
439 /* Called during long calculations to allow GUI to repair window damage, and to
440 check for stop buttons, etc... */
442 void (*interactive_hook
) PARAMS ((void));
444 /* Called when the registers have changed, as a hint to a GUI
445 to minimize window update. */
447 void (*registers_changed_hook
) PARAMS ((void));
449 /* tell the GUI someone changed the PC */
450 void (*pc_changed_hook
) PARAMS ((void));
452 /* Called when going to wait for the target. Usually allows the GUI to run
453 while waiting for target events. */
455 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
457 /* Used by UI as a wrapper around command execution. May do various things
458 like enabling/disabling buttons, etc... */
460 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
463 /* Called when the current thread changes. Argument is thread id. */
465 void (*context_hook
) PARAMS ((int id
));
467 /* Takes control from error (). Typically used to prevent longjmps out of the
468 middle of the GUI. Usually used in conjunction with a catch routine. */
470 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
473 /* Where to go for return_to_top_level (RETURN_ERROR). */
474 SIGJMP_BUF error_return
;
475 /* Where to go for return_to_top_level (RETURN_QUIT). */
476 SIGJMP_BUF quit_return
;
478 /* Return for reason REASON. This generally gets back to the command
479 loop, but can be caught via catch_errors. */
482 return_to_top_level (reason
)
483 enum return_reason reason
;
488 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
489 I can think of a reason why that is vital, though). */
490 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
492 disable_current_display ();
493 do_cleanups (ALL_CLEANUPS
);
495 if (annotation_level
> 1)
506 (NORETURN
void) SIGLONGJMP
507 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
510 /* Call FUNC with arg ARGS, catching any errors. If there is no
511 error, return the value returned by FUNC. If there is an error,
512 print ERRSTRING, print the specific error message, then return
515 Must not be called with immediate_quit in effect (bad things might
516 happen, say we got a signal in the middle of a memcpy to quit_return).
517 This is an OK restriction; with very few exceptions immediate_quit can
518 be replaced by judicious use of QUIT.
520 MASK specifies what to catch; it is normally set to
521 RETURN_MASK_ALL, if for no other reason than that the code which
522 calls catch_errors might not be set up to deal with a quit which
523 isn't caught. But if the code can deal with it, it generally
524 should be RETURN_MASK_ERROR, unless for some reason it is more
525 useful to abort only the portion of the operation inside the
526 catch_errors. Note that quit should return to the command line
527 fairly quickly, even if some further processing is being done. */
530 catch_errors (func
, args
, errstring
, mask
)
531 int (*func
) PARAMS ((char *));
536 SIGJMP_BUF saved_error
;
537 SIGJMP_BUF saved_quit
;
540 struct cleanup
*saved_cleanup_chain
;
541 char *saved_error_pre_print
;
542 char *saved_quit_pre_print
;
544 saved_cleanup_chain
= save_cleanups ();
545 saved_error_pre_print
= error_pre_print
;
546 saved_quit_pre_print
= quit_pre_print
;
548 if (mask
& RETURN_MASK_ERROR
)
550 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (SIGJMP_BUF
));
551 error_pre_print
= errstring
;
553 if (mask
& RETURN_MASK_QUIT
)
555 memcpy (saved_quit
, quit_return
, sizeof (SIGJMP_BUF
));
556 quit_pre_print
= errstring
;
559 if (SIGSETJMP (tmp_jmp
) == 0)
561 if (mask
& RETURN_MASK_ERROR
)
562 memcpy (error_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
563 if (mask
& RETURN_MASK_QUIT
)
564 memcpy (quit_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
565 val
= (*func
) (args
);
570 restore_cleanups (saved_cleanup_chain
);
572 if (mask
& RETURN_MASK_ERROR
)
574 memcpy (error_return
, saved_error
, sizeof (SIGJMP_BUF
));
575 error_pre_print
= saved_error_pre_print
;
577 if (mask
& RETURN_MASK_QUIT
)
579 memcpy (quit_return
, saved_quit
, sizeof (SIGJMP_BUF
));
580 quit_pre_print
= saved_quit_pre_print
;
585 /* Handler for SIGHUP. */
592 catch_errors (quit_cover
, NULL
,
593 "Could not kill the program being debugged", RETURN_MASK_ALL
);
594 signal (SIGHUP
, SIG_DFL
);
595 kill (getpid (), SIGHUP
);
598 /* Just a little helper function for disconnect(). */
604 caution
= 0; /* Throw caution to the wind -- we're exiting.
605 This prevents asking the user dumb questions. */
606 quit_command((char *)0, 0);
609 #endif /* defined SIGHUP */
611 /* Line number we are currently in in a file which is being sourced. */
612 static int source_line_number
;
614 /* Name of the file we are sourcing. */
615 static char *source_file_name
;
617 /* Buffer containing the error_pre_print used by the source stuff.
619 static char *source_error
;
620 static int source_error_allocated
;
622 /* Something to glom on to the start of error_pre_print if source_file_name
624 static char *source_pre_error
;
626 /* Clean up on error during a "source" command (or execution of a
627 user-defined command). */
630 source_cleanup (stream
)
633 /* Restore the previous input stream. */
637 /* Read commands from STREAM. */
639 read_command_file (stream
)
642 struct cleanup
*cleanups
;
644 cleanups
= make_cleanup (source_cleanup
, instream
);
647 do_cleanups (cleanups
);
650 extern void init_proc
PARAMS ((void));
652 void (*pre_init_ui_hook
) PARAMS ((void));
658 if (pre_init_ui_hook
)
661 /* Run the init function of each source file */
663 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
664 current_directory
= gdb_dirbuf
;
666 init_cmd_lists (); /* This needs to be done first */
667 initialize_targets (); /* Setup target_terminal macros for utils.c */
668 initialize_utils (); /* Make errors and warnings possible */
669 initialize_all_files ();
670 init_main (); /* But that omits this file! Do it now */
675 /* We need a default language for parsing expressions, so simple things like
676 "set width 0" won't fail if no language is explicitly set in a config file
677 or implicitly set by reading an executable during startup. */
678 set_language (language_c
);
679 expected_language
= current_language
; /* don't warn about the change. */
682 init_ui_hook (argv0
);
685 /* Allocate, initialize a new command line structure for one of the
686 control commands (if/while). */
688 static struct command_line
*
689 build_command_line (type
, args
)
690 enum command_control_type type
;
693 struct command_line
*cmd
;
696 error ("if/while commands require arguments.\n");
698 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
700 cmd
->control_type
= type
;
704 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
706 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
707 cmd
->line
= savestring (args
, strlen (args
));
711 /* Build and return a new command structure for the control commands
712 such as "if" and "while". */
714 static struct command_line
*
715 get_command_line (type
, arg
)
716 enum command_control_type type
;
719 struct command_line
*cmd
;
720 struct cleanup
*old_chain
= NULL
;
722 /* Allocate and build a new command line structure. */
723 cmd
= build_command_line (type
, arg
);
725 old_chain
= make_cleanup (free_command_lines
, &cmd
);
727 /* Read in the body of this command. */
728 if (recurse_read_control_structure (cmd
) == invalid_control
)
730 warning ("error reading in control structure\n");
731 do_cleanups (old_chain
);
735 discard_cleanups (old_chain
);
739 /* Recursively print a command (including full control structures). */
741 print_command_line (cmd
, depth
)
742 struct command_line
*cmd
;
749 for (i
= 0; i
< depth
; i
++)
750 fputs_filtered (" ", gdb_stdout
);
753 /* A simple command, print it and return. */
754 if (cmd
->control_type
== simple_control
)
756 fputs_filtered (cmd
->line
, gdb_stdout
);
757 fputs_filtered ("\n", gdb_stdout
);
761 /* loop_continue to jump to the start of a while loop, print it
763 if (cmd
->control_type
== continue_control
)
765 fputs_filtered ("loop_continue\n", gdb_stdout
);
769 /* loop_break to break out of a while loop, print it and return. */
770 if (cmd
->control_type
== break_control
)
772 fputs_filtered ("loop_break\n", gdb_stdout
);
776 /* A while command. Recursively print its subcommands before returning. */
777 if (cmd
->control_type
== while_control
)
779 struct command_line
*list
;
780 fputs_filtered ("while ", gdb_stdout
);
781 fputs_filtered (cmd
->line
, gdb_stdout
);
782 fputs_filtered ("\n", gdb_stdout
);
783 list
= *cmd
->body_list
;
786 print_command_line (list
, depth
+ 1);
791 /* An if command. Recursively print both arms before returning. */
792 if (cmd
->control_type
== if_control
)
794 fputs_filtered ("if ", gdb_stdout
);
795 fputs_filtered (cmd
->line
, gdb_stdout
);
796 fputs_filtered ("\n", gdb_stdout
);
798 print_command_line (cmd
->body_list
[0], depth
+ 1);
800 /* Show the false arm if it exists. */
801 if (cmd
->body_count
== 2)
805 for (i
= 0; i
< depth
; i
++)
806 fputs_filtered (" ", gdb_stdout
);
808 fputs_filtered ("else\n", gdb_stdout
);
809 print_command_line (cmd
->body_list
[1], depth
+ 1);
813 for (i
= 0; i
< depth
; i
++)
814 fputs_filtered (" ", gdb_stdout
);
816 fputs_filtered ("end\n", gdb_stdout
);
820 /* Execute the command in CMD. */
822 enum command_control_type
823 execute_control_command (cmd
)
824 struct command_line
*cmd
;
826 struct expression
*expr
;
827 struct command_line
*current
;
828 struct cleanup
*old_chain
= 0;
832 enum command_control_type ret
;
835 switch (cmd
->control_type
)
838 /* A simple command, execute it and return. */
839 new_line
= insert_args (cmd
->line
);
841 return invalid_control
;
842 old_chain
= make_cleanup (free_current_contents
, &new_line
);
843 execute_command (new_line
, 0);
844 ret
= cmd
->control_type
;
847 case continue_control
:
849 /* Return for "continue", and "break" so we can either
850 continue the loop at the top, or break out. */
851 ret
= cmd
->control_type
;
856 /* Parse the loop control expression for the while statement. */
857 new_line
= insert_args (cmd
->line
);
859 return invalid_control
;
860 old_chain
= make_cleanup (free_current_contents
, &new_line
);
861 expr
= parse_expression (new_line
);
862 make_cleanup (free_current_contents
, &expr
);
864 ret
= simple_control
;
867 /* Keep iterating so long as the expression is true. */
874 /* Evaluate the expression. */
875 val_mark
= value_mark ();
876 val
= evaluate_expression (expr
);
877 cond_result
= value_true (val
);
878 value_free_to_mark (val_mark
);
880 /* If the value is false, then break out of the loop. */
884 /* Execute the body of the while statement. */
885 current
= *cmd
->body_list
;
888 ret
= execute_control_command (current
);
890 /* If we got an error, or a "break" command, then stop
892 if (ret
== invalid_control
|| ret
== break_control
)
898 /* If we got a "continue" command, then restart the loop
900 if (ret
== continue_control
)
903 /* Get the next statement. */
904 current
= current
->next
;
908 /* Reset RET so that we don't recurse the break all the way down. */
909 if (ret
== break_control
)
910 ret
= simple_control
;
917 new_line
= insert_args (cmd
->line
);
919 return invalid_control
;
920 old_chain
= make_cleanup (free_current_contents
, &new_line
);
921 /* Parse the conditional for the if statement. */
922 expr
= parse_expression (new_line
);
923 make_cleanup (free_current_contents
, &expr
);
926 ret
= simple_control
;
928 /* Evaluate the conditional. */
929 val_mark
= value_mark ();
930 val
= evaluate_expression (expr
);
932 /* Choose which arm to take commands from based on the value of the
933 conditional expression. */
934 if (value_true (val
))
935 current
= *cmd
->body_list
;
936 else if (cmd
->body_count
== 2)
937 current
= *(cmd
->body_list
+ 1);
938 value_free_to_mark (val_mark
);
940 /* Execute commands in the given arm. */
943 ret
= execute_control_command (current
);
945 /* If we got an error, get out. */
946 if (ret
!= simple_control
)
949 /* Get the next statement in the body. */
950 current
= current
->next
;
957 warning ("Invalid control type in command structure.");
958 return invalid_control
;
962 do_cleanups (old_chain
);
967 /* "while" command support. Executes a body of statements while the
968 loop condition is nonzero. */
971 while_command (arg
, from_tty
)
975 struct command_line
*command
= NULL
;
978 command
= get_command_line (while_control
, arg
);
983 execute_control_command (command
);
984 free_command_lines (&command
);
987 /* "if" command support. Execute either the true or false arm depending
988 on the value of the if conditional. */
991 if_command (arg
, from_tty
)
995 struct command_line
*command
= NULL
;
998 command
= get_command_line (if_control
, arg
);
1000 if (command
== NULL
)
1003 execute_control_command (command
);
1004 free_command_lines (&command
);
1011 struct user_args
*oargs
= user_args
;
1013 fatal ("Internal error, arg_cleanup called with no user args.\n");
1015 user_args
= user_args
->next
;
1019 /* Bind the incomming arguments for a user defined command to
1020 $arg0, $arg1 ... $argMAXUSERARGS. */
1022 static struct cleanup
*
1026 struct user_args
*args
;
1027 struct cleanup
*old_chain
;
1028 unsigned int arg_count
= 0;
1030 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1031 memset (args
, 0, sizeof (struct user_args
));
1033 args
->next
= user_args
;
1036 old_chain
= make_cleanup (arg_cleanup
, 0);
1048 if (arg_count
>= MAXUSERARGS
)
1050 error ("user defined function may only have %d arguments.\n",
1055 /* Strip whitespace. */
1056 while (*p
== ' ' || *p
== '\t')
1059 /* P now points to an argument. */
1061 user_args
->a
[arg_count
].arg
= p
;
1063 /* Get to the end of this argument. */
1066 if (((*p
== ' ' || *p
== '\t')) && !squote
&& !dquote
&& !bsquote
)
1072 else if (*p
== '\\')
1095 user_args
->a
[arg_count
].len
= p
- start_arg
;
1102 /* Given character string P, return a point to the first argument ($arg),
1103 or NULL if P contains no arguments. */
1109 while ((p
= strchr (p
, '$')))
1111 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1118 /* Insert the user defined arguments stored in user_arg into the $arg
1119 arguments found in line, with the updated copy being placed into nline. */
1125 char *p
, *save_line
, *new_line
;
1128 /* First we need to know how much memory to allocate for the new line. */
1131 while ((p
= locate_arg (line
)))
1136 if (i
>= user_args
->count
)
1138 error ("Missing argument %d in user function.\n", i
);
1141 len
+= user_args
->a
[i
].len
;
1145 /* Don't forget the tail. */
1146 len
+= strlen (line
);
1148 /* Allocate space for the new line and fill it in. */
1149 new_line
= (char *)xmalloc (len
+ 1);
1150 if (new_line
== NULL
)
1153 /* Restore pointer to beginning of old line. */
1156 /* Save pointer to beginning of new line. */
1157 save_line
= new_line
;
1159 while ((p
= locate_arg (line
)))
1163 memcpy (new_line
, line
, p
- line
);
1164 new_line
+= p
- line
;
1167 len
= user_args
->a
[i
].len
;
1170 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1175 /* Don't forget the tail. */
1176 strcpy (new_line
, line
);
1178 /* Return a pointer to the beginning of the new line. */
1183 execute_user_command (c
, args
)
1184 struct cmd_list_element
*c
;
1187 register struct command_line
*cmdlines
;
1188 struct cleanup
*old_chain
;
1189 enum command_control_type ret
;
1191 old_chain
= setup_user_args (args
);
1193 cmdlines
= c
->user_commands
;
1198 /* Set the instream to 0, indicating execution of a
1199 user-defined function. */
1200 old_chain
= make_cleanup (source_cleanup
, instream
);
1201 instream
= (FILE *) 0;
1204 ret
= execute_control_command (cmdlines
);
1205 if (ret
!= simple_control
&& ret
!= break_control
)
1207 warning ("Error in control structure.\n");
1210 cmdlines
= cmdlines
->next
;
1212 do_cleanups (old_chain
);
1215 /* Execute the line P as a command.
1216 Pass FROM_TTY as second argument to the defining function. */
1219 execute_command (p
, from_tty
)
1223 register struct cmd_list_element
*c
;
1224 register enum language flang
;
1225 static int warned
= 0;
1226 /* FIXME: These should really be in an appropriate header file */
1227 extern void serial_log_command
PARAMS ((const char *));
1231 /* Force cleanup of any alloca areas if using C alloca instead of
1232 a builtin alloca. */
1235 /* This can happen when command_line_input hits end of file. */
1239 serial_log_command (p
);
1241 while (*p
== ' ' || *p
== '\t') p
++;
1246 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1247 /* Pass null arg rather than an empty one. */
1250 /* Clear off trailing whitespace, except for set and complete command. */
1251 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1253 p
= arg
+ strlen (arg
) - 1;
1254 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1259 /* If this command has been hooked, run the hook first. */
1261 execute_user_command (c
->hook
, (char *)0);
1263 if (c
->class == class_user
)
1264 execute_user_command (c
, arg
);
1265 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1266 do_setshow_command (arg
, from_tty
& caution
, c
);
1267 else if (c
->function
.cfunc
== NO_FUNCTION
)
1268 error ("That is not a command, just a help topic.");
1269 else if (call_command_hook
)
1270 call_command_hook (c
, arg
, from_tty
& caution
);
1272 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1275 /* Tell the user if the language has changed (except first time). */
1276 if (current_language
!= expected_language
)
1278 if (language_mode
== language_mode_auto
) {
1279 language_info (1); /* Print what changed. */
1284 /* Warn the user if the working language does not match the
1285 language of the current frame. Only warn the user if we are
1286 actually running the program, i.e. there is a stack. */
1287 /* FIXME: This should be cacheing the frame and only running when
1288 the frame changes. */
1290 if (target_has_stack
)
1292 flang
= get_frame_language ();
1294 && flang
!= language_unknown
1295 && flang
!= current_language
->la_language
)
1297 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1305 command_loop_marker (foo
)
1310 /* Read commands from `instream' and execute them
1311 until end of file or error reading instream. */
1316 struct cleanup
*old_chain
;
1318 int stdin_is_tty
= ISATTY (stdin
);
1319 long time_at_cmd_start
;
1321 long space_at_cmd_start
;
1323 extern int display_time
;
1324 extern int display_space
;
1326 while (instream
&& !feof (instream
))
1328 if (window_hook
&& instream
== stdin
)
1329 (*window_hook
) (instream
, prompt
);
1332 if (instream
== stdin
&& stdin_is_tty
)
1333 reinitialize_more_filter ();
1334 old_chain
= make_cleanup (command_loop_marker
, 0);
1335 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1336 instream
== stdin
, "prompt");
1340 time_at_cmd_start
= get_run_time ();
1345 extern char **environ
;
1346 char *lim
= (char *) sbrk (0);
1348 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1352 execute_command (command
, instream
== stdin
);
1353 /* Do any commands attached to breakpoint we stopped at. */
1354 bpstat_do_actions (&stop_bpstat
);
1355 do_cleanups (old_chain
);
1359 long cmd_time
= get_run_time () - time_at_cmd_start
;
1361 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1362 cmd_time
/ 1000000, cmd_time
% 1000000);
1368 extern char **environ
;
1369 char *lim
= (char *) sbrk (0);
1370 long space_now
= lim
- (char *) &environ
;
1371 long space_diff
= space_now
- space_at_cmd_start
;
1373 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1375 (space_diff
>= 0 ? '+' : '-'),
1382 /* Commands call this if they do not want to be repeated by null lines. */
1390 /* If we aren't reading from standard input, we are saving the last
1391 thing read from stdin in line and don't want to delete it. Null lines
1392 won't repeat here in any case. */
1393 if (instream
== stdin
)
1397 /* Read a line from the stream "instream" without command line editing.
1399 It prints PRROMPT once at the start.
1400 Action is compatible with "readline", e.g. space for the result is
1401 malloc'd and should be freed by the caller.
1403 A NULL return means end of file. */
1405 gdb_readline (prrompt
)
1410 int input_index
= 0;
1411 int result_size
= 80;
1415 /* Don't use a _filtered function here. It causes the assumed
1416 character position to be off, since the newline we read from
1417 the user is not accounted for. */
1418 fputs_unfiltered (prrompt
, gdb_stdout
);
1420 /* Move to a new line so the entered line doesn't have a prompt
1421 on the front of it. */
1422 fputs_unfiltered ("\n", gdb_stdout
);
1424 gdb_flush (gdb_stdout
);
1427 result
= (char *) xmalloc (result_size
);
1431 /* Read from stdin if we are executing a user defined command.
1432 This is the right thing for prompt_for_continue, at least. */
1433 c
= fgetc (instream
? instream
: stdin
);
1437 if (input_index
> 0)
1438 /* The last line does not end with a newline. Return it, and
1439 if we are called again fgetc will still return EOF and
1440 we'll return NULL then. */
1449 result
[input_index
++] = c
;
1450 while (input_index
>= result_size
)
1453 result
= (char *) xrealloc (result
, result_size
);
1457 result
[input_index
++] = '\0';
1461 /* Variables which control command line editing and history
1462 substitution. These variables are given default values at the end
1464 static int command_editing_p
;
1465 static int history_expansion_p
;
1466 static int write_history_p
;
1467 static int history_size
;
1468 static char *history_filename
;
1470 /* readline uses the word breaks for two things:
1471 (1) In figuring out where to point the TEXT parameter to the
1472 rl_completion_entry_function. Since we don't use TEXT for much,
1473 it doesn't matter a lot what the word breaks are for this purpose, but
1474 it does affect how much stuff M-? lists.
1475 (2) If one of the matches contains a word break character, readline
1476 will quote it. That's why we switch between
1477 gdb_completer_word_break_characters and
1478 gdb_completer_command_word_break_characters. I'm not sure when
1479 we need this behavior (perhaps for funky characters in C++ symbols?). */
1481 /* Variables which are necessary for fancy command line editing. */
1482 char *gdb_completer_word_break_characters
=
1483 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1485 /* When completing on command names, we remove '-' from the list of
1486 word break characters, since we use it in command names. If the
1487 readline library sees one in any of the current completion strings,
1488 it thinks that the string needs to be quoted and automatically supplies
1490 char *gdb_completer_command_word_break_characters
=
1491 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1493 /* Characters that can be used to quote completion strings. Note that we
1494 can't include '"' because the gdb C parser treats such quoted sequences
1496 char *gdb_completer_quote_characters
=
1499 /* Functions that are used as part of the fancy command line editing. */
1501 /* This can be used for functions which don't want to complete on symbols
1502 but don't want to complete on anything else either. */
1505 noop_completer (text
, prefix
)
1512 /* Complete on filenames. */
1514 filename_completer (text
, word
)
1518 /* From readline. */
1519 extern char *filename_completion_function
PARAMS ((char *, int));
1520 int subsequent_name
;
1522 int return_val_used
;
1523 int return_val_alloced
;
1525 return_val_used
= 0;
1526 /* Small for testing. */
1527 return_val_alloced
= 1;
1528 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1530 subsequent_name
= 0;
1534 p
= filename_completion_function (text
, subsequent_name
);
1535 if (return_val_used
>= return_val_alloced
)
1537 return_val_alloced
*= 2;
1539 (char **) xrealloc (return_val
,
1540 return_val_alloced
* sizeof (char *));
1544 return_val
[return_val_used
++] = p
;
1547 /* Like emacs, don't complete on old versions. Especially useful
1548 in the "source" command. */
1549 if (p
[strlen (p
) - 1] == '~')
1555 /* Return exactly p. */
1556 return_val
[return_val_used
++] = p
;
1557 else if (word
> text
)
1559 /* Return some portion of p. */
1560 q
= xmalloc (strlen (p
) + 5);
1561 strcpy (q
, p
+ (word
- text
));
1562 return_val
[return_val_used
++] = q
;
1567 /* Return some of TEXT plus p. */
1568 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1569 strncpy (q
, word
, text
- word
);
1570 q
[text
- word
] = '\0';
1572 return_val
[return_val_used
++] = q
;
1576 subsequent_name
= 1;
1579 /* There is no way to do this just long enough to affect quote inserting
1580 without also affecting the next completion. This should be fixed in
1582 /* Insure that readline does the right thing
1583 with respect to inserting quotes. */
1584 rl_completer_word_break_characters
= "";
1589 /* Here are some useful test cases for completion. FIXME: These should
1590 be put in the test suite. They should be tested with both M-? and TAB.
1592 "show output-" "radix"
1593 "show output" "-radix"
1594 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1595 "p " ambiguous (all symbols)
1596 "info t foo" no completions
1597 "info t " no completions
1598 "info t" ambiguous ("info target", "info terminal", etc.)
1599 "info ajksdlfk" no completions
1600 "info ajksdlfk " no completions
1602 "info " ambiguous (all info commands)
1603 "p \"a" no completions (string constant)
1604 "p 'a" ambiguous (all symbols starting with a)
1605 "p b-a" ambiguous (all symbols starting with a)
1606 "p b-" ambiguous (all symbols)
1607 "file Make" "file" (word break hard to screw up here)
1608 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1611 /* Generate completions one by one for the completer. Each time we are
1612 called return another potential completion to the caller.
1613 line_completion just completes on commands or passes the buck to the
1614 command's completer function, the stuff specific to symbol completion
1615 is in make_symbol_completion_list.
1617 TEXT is the caller's idea of the "word" we are looking at.
1619 MATCHES is the number of matches that have currently been collected from
1620 calling this completion function. When zero, then we need to initialize,
1621 otherwise the initialization has already taken place and we can just
1622 return the next potential completion string.
1624 LINE_BUFFER is available to be looked at; it contains the entire text
1625 of the line. POINT is the offset in that line of the cursor. You
1626 should pretend that the line ends at POINT.
1628 Returns NULL if there are no more completions, else a pointer to a string
1629 which is a possible completion, it is the caller's responsibility to
1633 line_completion_function (text
, matches
, line_buffer
, point
)
1639 static char **list
= (char **)NULL
; /* Cache of completions */
1640 static int index
; /* Next cached completion */
1641 char *output
= NULL
;
1642 char *tmp_command
, *p
;
1643 /* Pointer within tmp_command which corresponds to text. */
1645 struct cmd_list_element
*c
, *result_list
;
1649 /* The caller is beginning to accumulate a new set of completions, so
1650 we need to find all of them now, and cache them for returning one at
1651 a time on future calls. */
1655 /* Free the storage used by LIST, but not by the strings inside.
1656 This is because rl_complete_internal () frees the strings. */
1662 /* Choose the default set of word break characters to break completions.
1663 If we later find out that we are doing completions on command strings
1664 (as opposed to strings supplied by the individual command completer
1665 functions, which can be any string) then we will switch to the
1666 special word break set for command strings, which leaves out the
1667 '-' character used in some commands. */
1669 rl_completer_word_break_characters
=
1670 gdb_completer_word_break_characters
;
1672 /* Decide whether to complete on a list of gdb commands or on symbols. */
1673 tmp_command
= (char *) alloca (point
+ 1);
1676 strncpy (tmp_command
, line_buffer
, point
);
1677 tmp_command
[point
] = '\0';
1678 /* Since text always contains some number of characters leading up
1679 to point, we can find the equivalent position in tmp_command
1680 by subtracting that many characters from the end of tmp_command. */
1681 word
= tmp_command
+ point
- strlen (text
);
1685 /* An empty line we want to consider ambiguous; that is, it
1686 could be any command. */
1687 c
= (struct cmd_list_element
*) -1;
1692 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1695 /* Move p up to the next interesting thing. */
1696 while (*p
== ' ' || *p
== '\t')
1703 /* It is an unrecognized command. So there are no
1704 possible completions. */
1707 else if (c
== (struct cmd_list_element
*) -1)
1711 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1712 doesn't advance over that thing itself. Do so now. */
1714 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1716 if (q
!= tmp_command
+ point
)
1718 /* There is something beyond the ambiguous
1719 command, so there are no possible completions. For
1720 example, "info t " or "info t foo" does not complete
1721 to anything, because "info t" can be "info target" or
1727 /* We're trying to complete on the command which was ambiguous.
1728 This we can deal with. */
1731 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1736 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1738 /* Insure that readline does the right thing with respect to
1739 inserting quotes. */
1740 rl_completer_word_break_characters
=
1741 gdb_completer_command_word_break_characters
;
1746 /* We've recognized a full command. */
1748 if (p
== tmp_command
+ point
)
1750 /* There is no non-whitespace in the line beyond the command. */
1752 if (p
[-1] == ' ' || p
[-1] == '\t')
1754 /* The command is followed by whitespace; we need to complete
1755 on whatever comes after command. */
1758 /* It is a prefix command; what comes after it is
1759 a subcommand (e.g. "info "). */
1760 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1762 /* Insure that readline does the right thing
1763 with respect to inserting quotes. */
1764 rl_completer_word_break_characters
=
1765 gdb_completer_command_word_break_characters
;
1769 list
= complete_on_enum (c
->enums
, p
, word
);
1770 rl_completer_word_break_characters
=
1771 gdb_completer_command_word_break_characters
;
1775 /* It is a normal command; what comes after it is
1776 completed by the command's completer function. */
1777 list
= (*c
->completer
) (p
, word
);
1782 /* The command is not followed by whitespace; we need to
1783 complete on the command itself. e.g. "p" which is a
1784 command itself but also can complete to "print", "ptype"
1788 /* Find the command we are completing on. */
1790 while (q
> tmp_command
)
1792 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1798 list
= complete_on_cmdlist (result_list
, q
, word
);
1800 /* Insure that readline does the right thing
1801 with respect to inserting quotes. */
1802 rl_completer_word_break_characters
=
1803 gdb_completer_command_word_break_characters
;
1808 /* There is non-whitespace beyond the command. */
1810 if (c
->prefixlist
&& !c
->allow_unknown
)
1812 /* It is an unrecognized subcommand of a prefix command,
1813 e.g. "info adsfkdj". */
1818 list
= complete_on_enum (c
->enums
, p
, word
);
1822 /* It is a normal command. */
1823 list
= (*c
->completer
) (p
, word
);
1829 /* If we found a list of potential completions during initialization then
1830 dole them out one at a time. The vector of completions is NULL
1831 terminated, so after returning the last one, return NULL (and continue
1832 to do so) each time we are called after that, until a new list is
1837 output
= list
[index
];
1845 /* Can't do this because readline hasn't yet checked the word breaks
1846 for figuring out whether to insert a quote. */
1848 /* Make sure the word break characters are set back to normal for the
1849 next time that readline tries to complete something. */
1850 rl_completer_word_break_characters
=
1851 gdb_completer_word_break_characters
;
1857 /* Line completion interface function for readline. */
1860 readline_line_completion_function (text
, matches
)
1864 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1867 /* Skip over a possibly quoted word (as defined by the quote characters
1868 and word break characters the completer uses). Returns pointer to the
1869 location after the "word". */
1875 char quote_char
= '\0';
1878 for (scan
= str
; *scan
!= '\0'; scan
++)
1880 if (quote_char
!= '\0')
1882 /* Ignore everything until the matching close quote char */
1883 if (*scan
== quote_char
)
1885 /* Found matching close quote. */
1890 else if (strchr (gdb_completer_quote_characters
, *scan
))
1892 /* Found start of a quoted string. */
1895 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1909 #if STOP_SIGNAL == SIGTSTP
1910 signal (SIGTSTP
, SIG_DFL
);
1912 kill (getpid (), SIGTSTP
);
1913 signal (SIGTSTP
, stop_sig
);
1915 signal (STOP_SIGNAL
, stop_sig
);
1917 printf_unfiltered ("%s", prompt
);
1918 gdb_flush (gdb_stdout
);
1920 /* Forget about any previous command -- null line now will do nothing. */
1923 #endif /* STOP_SIGNAL */
1925 /* Initialize signal handlers. */
1930 /* Under System V the default disposition of a signal is reinstated after
1931 the signal is caught and delivered to an application process. On such
1932 systems one must restore the replacement signal handler if one wishes
1933 to continue handling the signal in one's program. On BSD systems this
1934 is not needed but it is harmless, and it simplifies the code to just do
1935 it unconditionally. */
1936 signal (signo
, do_nothing
);
1942 signal (SIGINT
, request_quit
);
1944 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1945 to the inferior and breakpoints will be ignored. */
1947 signal (SIGTRAP
, SIG_DFL
);
1950 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1951 passed to the inferior, which we don't want. It would be
1952 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1953 on BSD4.3 systems using vfork, that can affect the
1954 GDB process as well as the inferior (the signal handling tables
1955 might be in memory, shared between the two). Since we establish
1956 a handler for SIGQUIT, when we call exec it will set the signal
1957 to SIG_DFL for us. */
1958 signal (SIGQUIT
, do_nothing
);
1960 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1961 signal (SIGHUP
, disconnect
);
1963 signal (SIGFPE
, float_handler
);
1965 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1966 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1970 /* Read one line from the command input stream `instream'
1971 into the local static buffer `linebuffer' (whose current length
1973 The buffer is made bigger as necessary.
1974 Returns the address of the start of the line.
1976 NULL is returned for end of file.
1978 *If* the instream == stdin & stdin is a terminal, the line read
1979 is copied into the file line saver (global var char *line,
1980 length linesize) so that it can be duplicated.
1982 This routine either uses fancy command line editing or
1983 simple input as the user has requested. */
1986 command_line_input (prrompt
, repeat
, annotation_suffix
)
1989 char *annotation_suffix
;
1991 static char *linebuffer
= 0;
1992 static unsigned linelength
= 0;
1996 char *local_prompt
= prrompt
;
2000 /* The annotation suffix must be non-NULL. */
2001 if (annotation_suffix
== NULL
)
2002 annotation_suffix
= "";
2004 if (annotation_level
> 1 && instream
== stdin
)
2006 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
2007 + strlen (annotation_suffix
) + 40);
2008 if (prrompt
== NULL
)
2009 local_prompt
[0] = '\0';
2011 strcpy (local_prompt
, prrompt
);
2012 strcat (local_prompt
, "\n\032\032");
2013 strcat (local_prompt
, annotation_suffix
);
2014 strcat (local_prompt
, "\n");
2017 if (linebuffer
== 0)
2020 linebuffer
= (char *) xmalloc (linelength
);
2025 /* Control-C quits instantly if typed while in this loop
2026 since it should not wait until the user types a newline. */
2030 signal (STOP_SIGNAL
, stop_sig
);
2035 /* Make sure that all output has been output. Some machines may let
2036 you get away with leaving out some of the gdb_flush, but not all. */
2038 gdb_flush (gdb_stdout
);
2039 gdb_flush (gdb_stderr
);
2041 if (source_file_name
!= NULL
)
2043 ++source_line_number
;
2044 sprintf (source_error
,
2045 "%s%s:%d: Error in sourced command file:\n",
2048 source_line_number
);
2049 error_pre_print
= source_error
;
2052 if (annotation_level
> 1 && instream
== stdin
)
2054 printf_unfiltered ("\n\032\032pre-");
2055 printf_unfiltered (annotation_suffix
);
2056 printf_unfiltered ("\n");
2059 /* Don't use fancy stuff if not talking to stdin. */
2060 if (readline_hook
&& instream
== NULL
)
2062 rl
= (*readline_hook
) (local_prompt
);
2064 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2066 rl
= readline (local_prompt
);
2070 rl
= gdb_readline (local_prompt
);
2073 if (annotation_level
> 1 && instream
== stdin
)
2075 printf_unfiltered ("\n\032\032post-");
2076 printf_unfiltered (annotation_suffix
);
2077 printf_unfiltered ("\n");
2080 if (!rl
|| rl
== (char *) EOF
)
2085 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2087 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2088 nline
= (char *) xrealloc (linebuffer
, linelength
);
2089 p
+= nline
- linebuffer
;
2093 /* Copy line. Don't copy null at end. (Leaves line alone
2094 if this was just a newline) */
2098 free (rl
); /* Allocated in readline. */
2100 if (p
== linebuffer
|| *(p
- 1) != '\\')
2103 p
--; /* Put on top of '\'. */
2104 local_prompt
= (char *) 0;
2109 signal (STOP_SIGNAL
, SIG_DFL
);
2116 #define SERVER_COMMAND_LENGTH 7
2118 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2119 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2122 /* Note that we don't set `line'. Between this and the check in
2123 dont_repeat, this insures that repeating will still do the
2126 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2129 /* Do history expansion if that is wished. */
2130 if (history_expansion_p
&& instream
== stdin
2131 && ISATTY (instream
))
2133 char *history_value
;
2136 *p
= '\0'; /* Insert null now. */
2137 expanded
= history_expand (linebuffer
, &history_value
);
2140 /* Print the changes. */
2141 printf_unfiltered ("%s\n", history_value
);
2143 /* If there was an error, call this function again. */
2146 free (history_value
);
2147 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2149 if (strlen (history_value
) > linelength
)
2151 linelength
= strlen (history_value
) + 1;
2152 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2154 strcpy (linebuffer
, history_value
);
2155 p
= linebuffer
+ strlen(linebuffer
);
2156 free (history_value
);
2160 /* If we just got an empty line, and that is supposed
2161 to repeat the previous command, return the value in the
2163 if (repeat
&& p
== linebuffer
)
2165 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2171 /* Add line to history if appropriate. */
2172 if (instream
== stdin
2173 && ISATTY (stdin
) && *linebuffer
)
2174 add_history (linebuffer
);
2176 /* Note: lines consisting solely of comments are added to the command
2177 history. This is useful when you type a command, and then
2178 realize you don't want to execute it quite yet. You can comment
2179 out the command and then later fetch it from the value history
2180 and remove the '#'. The kill ring is probably better, but some
2181 people are in the habit of commenting things out. */
2183 *p1
= '\0'; /* Found a comment. */
2185 /* Save into global buffer if appropriate. */
2188 if (linelength
> linesize
)
2190 line
= xrealloc (line
, linelength
);
2191 linesize
= linelength
;
2193 strcpy (line
, linebuffer
);
2201 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2202 code bodies. This is typically used when we encounter an "else"
2203 clause for an "if" command. */
2206 realloc_body_list (command
, new_length
)
2207 struct command_line
*command
;
2211 struct command_line
**body_list
;
2213 n
= command
->body_count
;
2215 /* Nothing to do? */
2216 if (new_length
<= n
)
2219 body_list
= (struct command_line
**)
2220 xmalloc (sizeof (struct command_line
*) * new_length
);
2222 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2224 free (command
->body_list
);
2225 command
->body_list
= body_list
;
2226 command
->body_count
= new_length
;
2229 /* Read one line from the input stream. If the command is an "else" or
2230 "end", return such an indication to the caller. */
2232 static enum misc_command_type
2233 read_next_line (command
)
2234 struct command_line
**command
;
2236 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2239 if (control_level
>= 254)
2240 error ("Control nesting too deep!\n");
2242 /* Set a prompt based on the nesting of the control commands. */
2243 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2245 for (i
= 0; i
< control_level
; i
++)
2246 control_prompt
[i
] = ' ';
2247 control_prompt
[i
] = '>';
2248 control_prompt
[i
+1] = '\0';
2249 prompt_ptr
= (char *)&control_prompt
[0];
2254 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2256 /* Not sure what to do here. */
2260 /* Strip leading and trailing whitespace. */
2261 while (*p
== ' ' || *p
== '\t')
2264 p1
= p
+ strlen (p
);
2265 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2268 /* Blanks and comments don't really do anything, but we need to
2269 distinguish them from else, end and other commands which can be
2271 if (p1
== p
|| p
[0] == '#')
2274 /* Is this the end of a simple, while, or if control structure? */
2275 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2278 /* Is the else clause of an if control structure? */
2279 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2280 return else_command
;
2282 /* Check for while, if, break, continue, etc and build a new command
2283 line structure for them. */
2284 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2285 *command
= build_command_line (while_control
, p
+ 6);
2286 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2287 *command
= build_command_line (if_control
, p
+ 3);
2288 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2290 *command
= (struct command_line
*)
2291 xmalloc (sizeof (struct command_line
));
2292 (*command
)->next
= NULL
;
2293 (*command
)->line
= NULL
;
2294 (*command
)->control_type
= break_control
;
2295 (*command
)->body_count
= 0;
2296 (*command
)->body_list
= NULL
;
2298 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2300 *command
= (struct command_line
*)
2301 xmalloc (sizeof (struct command_line
));
2302 (*command
)->next
= NULL
;
2303 (*command
)->line
= NULL
;
2304 (*command
)->control_type
= continue_control
;
2305 (*command
)->body_count
= 0;
2306 (*command
)->body_list
= NULL
;
2310 /* A normal command. */
2311 *command
= (struct command_line
*)
2312 xmalloc (sizeof (struct command_line
));
2313 (*command
)->next
= NULL
;
2314 (*command
)->line
= savestring (p
, p1
- p
);
2315 (*command
)->control_type
= simple_control
;
2316 (*command
)->body_count
= 0;
2317 (*command
)->body_list
= NULL
;
2320 /* Nothing special. */
2324 /* Recursively read in the control structures and create a command_line
2325 structure from them.
2327 The parent_control parameter is the control structure in which the
2328 following commands are nested. */
2330 static enum command_control_type
2331 recurse_read_control_structure (current_cmd
)
2332 struct command_line
*current_cmd
;
2334 int current_body
, i
;
2335 enum misc_command_type val
;
2336 enum command_control_type ret
;
2337 struct command_line
**body_ptr
, *child_tail
, *next
;
2342 /* Sanity checks. */
2343 if (current_cmd
->control_type
== simple_control
)
2345 error ("Recursed on a simple control type\n");
2346 return invalid_control
;
2349 if (current_body
> current_cmd
->body_count
)
2351 error ("Allocated body is smaller than this command type needs\n");
2352 return invalid_control
;
2355 /* Read lines from the input stream and build control structures. */
2361 val
= read_next_line (&next
);
2363 /* Just skip blanks and comments. */
2364 if (val
== nop_command
)
2367 if (val
== end_command
)
2369 if (current_cmd
->control_type
== while_control
2370 || current_cmd
->control_type
== if_control
)
2372 /* Success reading an entire control structure. */
2373 ret
= simple_control
;
2378 ret
= invalid_control
;
2383 /* Not the end of a control structure. */
2384 if (val
== else_command
)
2386 if (current_cmd
->control_type
== if_control
2387 && current_body
== 1)
2389 realloc_body_list (current_cmd
, 2);
2396 ret
= invalid_control
;
2403 child_tail
->next
= next
;
2407 body_ptr
= current_cmd
->body_list
;
2408 for (i
= 1; i
< current_body
; i
++)
2417 /* If the latest line is another control structure, then recurse
2419 if (next
->control_type
== while_control
2420 || next
->control_type
== if_control
)
2423 ret
= recurse_read_control_structure (next
);
2426 if (ret
!= simple_control
)
2436 /* Read lines from the input stream and accumulate them in a chain of
2437 struct command_line's, which is then returned. For input from a
2438 terminal, the special command "end" is used to mark the end of the
2439 input, and is not included in the returned chain of commands. */
2441 #define END_MESSAGE "End with a line saying just \"end\"."
2443 struct command_line
*
2444 read_command_lines (prompt
, from_tty
)
2448 struct command_line
*head
, *tail
, *next
;
2449 struct cleanup
*old_chain
;
2450 enum command_control_type ret
;
2451 enum misc_command_type val
;
2453 if (readline_begin_hook
)
2455 /* Note - intentional to merge messages with no newline */
2456 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2458 else if (from_tty
&& input_from_terminal_p ())
2460 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2461 gdb_flush (gdb_stdout
);
2469 val
= read_next_line (&next
);
2471 /* Ignore blank lines or comments. */
2472 if (val
== nop_command
)
2475 if (val
== end_command
)
2477 ret
= simple_control
;
2481 if (val
!= ok_command
)
2483 ret
= invalid_control
;
2487 if (next
->control_type
== while_control
2488 || next
->control_type
== if_control
)
2491 ret
= recurse_read_control_structure (next
);
2494 if (ret
== invalid_control
)
2505 old_chain
= make_cleanup (free_command_lines
, &head
);
2514 if (ret
!= invalid_control
)
2516 discard_cleanups (old_chain
);
2519 do_cleanups (old_chain
);
2522 if (readline_end_hook
)
2524 (*readline_end_hook
) ();
2529 /* Free a chain of struct command_line's. */
2532 free_command_lines (lptr
)
2533 struct command_line
**lptr
;
2535 register struct command_line
*l
= *lptr
;
2536 register struct command_line
*next
;
2537 struct command_line
**blist
;
2542 if (l
->body_count
> 0)
2544 blist
= l
->body_list
;
2545 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2546 free_command_lines (blist
);
2555 /* Add an element to the list of info subcommands. */
2558 add_info (name
, fun
, doc
)
2560 void (*fun
) PARAMS ((char *, int));
2563 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2566 /* Add an alias to the list of info subcommands. */
2569 add_info_alias (name
, oldname
, abbrev_flag
)
2574 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2577 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2578 Therefore, its own definition is called only for "info" with no args. */
2582 info_command (arg
, from_tty
)
2586 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2587 help_list (infolist
, "info ", -1, gdb_stdout
);
2590 /* The "complete" command is used by Emacs to implement completion. */
2594 complete_command (arg
, from_tty
)
2606 argpoint
= strlen (arg
);
2608 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2610 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2612 printf_unfiltered ("%s\n", completion
);
2617 /* The "show" command with no arguments shows all the settings. */
2621 show_command (arg
, from_tty
)
2625 cmd_show_list (showlist
, from_tty
, "");
2628 /* Add an element to the list of commands. */
2631 add_com (name
, class, fun
, doc
)
2633 enum command_class
class;
2634 void (*fun
) PARAMS ((char *, int));
2637 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2640 /* Add an alias or abbreviation command to the list of commands. */
2643 add_com_alias (name
, oldname
, class, abbrev_flag
)
2646 enum command_class
class;
2649 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2656 error ("Argument required (%s).", why
);
2661 help_command (command
, from_tty
)
2663 int from_tty
; /* Ignored */
2665 help_cmd (command
, gdb_stdout
);
2669 validate_comname (comname
)
2675 error_no_arg ("name of command to define");
2680 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2681 error ("Junk in argument list: \"%s\"", p
);
2686 /* This is just a placeholder in the command data structures. */
2688 user_defined_command (ignore
, from_tty
)
2695 define_command (comname
, from_tty
)
2699 register struct command_line
*cmds
;
2700 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2701 char *tem
= comname
;
2703 #define HOOK_STRING "hook-"
2706 validate_comname (comname
);
2708 /* Look it up, and verify that we got an exact match. */
2709 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2710 if (c
&& !STREQ (comname
, c
->name
))
2715 if (c
->class == class_user
|| c
->class == class_alias
)
2716 tem
= "Redefine command \"%s\"? ";
2718 tem
= "Really redefine built-in command \"%s\"? ";
2719 if (!query (tem
, c
->name
))
2720 error ("Command \"%s\" not redefined.", c
->name
);
2723 /* If this new command is a hook, then mark the command which it
2724 is hooking. Note that we allow hooking `help' commands, so that
2725 we can hook the `stop' pseudo-command. */
2727 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2729 /* Look up cmd it hooks, and verify that we got an exact match. */
2730 tem
= comname
+HOOK_LEN
;
2731 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2732 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2736 warning ("Your new `%s' command does not hook any existing command.",
2738 if (!query ("Proceed? "))
2739 error ("Not confirmed.");
2743 comname
= savestring (comname
, strlen (comname
));
2745 /* If the rest of the commands will be case insensitive, this one
2746 should behave in the same manner. */
2747 for (tem
= comname
; *tem
; tem
++)
2748 if (isupper(*tem
)) *tem
= tolower(*tem
);
2751 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2752 cmds
= read_command_lines (tmpbuf
, from_tty
);
2754 if (c
&& c
->class == class_user
)
2755 free_command_lines (&c
->user_commands
);
2757 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2758 (c
&& c
->class == class_user
)
2759 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2760 newc
->user_commands
= cmds
;
2762 /* If this new command is a hook, then mark both commands as being
2766 hookc
->hook
= newc
; /* Target gets hooked. */
2767 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2772 document_command (comname
, from_tty
)
2776 struct command_line
*doclines
;
2777 register struct cmd_list_element
*c
;
2778 char *tem
= comname
;
2781 validate_comname (comname
);
2783 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2785 if (c
->class != class_user
)
2786 error ("Command \"%s\" is built-in.", comname
);
2788 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2789 doclines
= read_command_lines (tmpbuf
, from_tty
);
2791 if (c
->doc
) free (c
->doc
);
2794 register struct command_line
*cl1
;
2795 register int len
= 0;
2797 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2798 len
+= strlen (cl1
->line
) + 1;
2800 c
->doc
= (char *) xmalloc (len
+ 1);
2803 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2805 strcat (c
->doc
, cl1
->line
);
2807 strcat (c
->doc
, "\n");
2811 free_command_lines (&doclines
);
2815 print_gdb_version (stream
)
2818 /* From GNU coding standards, first line is meant to be easy for a
2819 program to parse, and is just canonical program name and version
2820 number, which starts after last space. */
2822 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
2824 /* Second line is a copyright notice. */
2826 fprintf_filtered (stream
, "Copyright 1998 Free Software Foundation, Inc.\n");
2828 /* Following the copyright is a brief statement that the program is
2829 free software, that users are free to copy and change it on
2830 certain conditions, that it is covered by the GNU GPL, and that
2831 there is no warranty. */
2833 fprintf_filtered (stream
, "\
2834 GDB is free software, covered by the GNU General Public License, and you are\n\
2835 welcome to change it and/or distribute copies of it under certain conditions.\n\
2836 Type \"show copying\" to see the conditions.\n\
2837 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2839 /* After the required info we print the configuration information. */
2841 fprintf_filtered (stream
, "This GDB was configured as \"");
2842 if (!STREQ (host_name
, target_name
))
2844 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
2848 fprintf_filtered (stream
, "%s", host_name
);
2850 fprintf_filtered (stream
, "\".");
2855 show_version (args
, from_tty
)
2860 print_gdb_version (gdb_stdout
);
2861 printf_filtered ("\n");
2865 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2871 printf_unfiltered ("%s", prompt
);
2872 gdb_flush (gdb_stdout
);
2875 /* This replaces the above for the frontends: it returns a pointer
2883 /* If necessary, make the user confirm that we should quit. Return
2884 non-zero if we should quit, zero if we shouldn't. */
2889 if (inferior_pid
!= 0 && target_has_execution
)
2893 /* This is something of a hack. But there's no reliable way to
2894 see if a GUI is running. The `use_windows' variable doesn't
2897 s
= "A debugging session is active.\nDo you still want to close the debugger?";
2898 else if (attach_flag
)
2899 s
= "The program is running. Quit anyway (and detach it)? ";
2901 s
= "The program is running. Exit anyway? ";
2910 /* Quit without asking for confirmation. */
2913 quit_force (args
, from_tty
)
2919 /* An optional expression may be used to cause gdb to terminate with the
2920 value of that expression. */
2923 value_ptr val
= parse_and_eval (args
);
2925 exit_code
= (int) value_as_long (val
);
2928 if (inferior_pid
!= 0 && target_has_execution
)
2931 target_detach (args
, from_tty
);
2936 /* UDI wants this, to kill the TIP. */
2939 /* Save the history information if it is appropriate to do so. */
2940 if (write_history_p
&& history_filename
)
2941 write_history (history_filename
);
2943 do_final_cleanups(ALL_CLEANUPS
); /* Do any final cleanups before exiting */
2948 /* Handle the quit command. */
2951 quit_command (args
, from_tty
)
2955 if (! quit_confirm ())
2956 error ("Not confirmed.");
2957 quit_force (args
, from_tty
);
2960 /* Returns whether GDB is running on a terminal and whether the user
2961 desires that questions be asked of them on that terminal. */
2964 input_from_terminal_p ()
2966 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2971 pwd_command (args
, from_tty
)
2975 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2976 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2978 if (!STREQ (gdb_dirbuf
, current_directory
))
2979 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2980 current_directory
, gdb_dirbuf
);
2982 printf_unfiltered ("Working directory %s.\n", current_directory
);
2986 cd_command (dir
, from_tty
)
2991 /* Found something other than leading repetitions of "/..". */
2992 int found_real_path
;
2995 /* If the new directory is absolute, repeat is a no-op; if relative,
2996 repeat might be useful but is more likely to be a mistake. */
3000 error_no_arg ("new working directory");
3002 dir
= tilde_expand (dir
);
3003 make_cleanup (free
, dir
);
3005 if (chdir (dir
) < 0)
3006 perror_with_name (dir
);
3009 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
3011 current_directory
= dir
;
3014 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
3015 current_directory
= concat (current_directory
, dir
, NULL
);
3017 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
3021 /* Now simplify any occurrences of `.' and `..' in the pathname. */
3023 found_real_path
= 0;
3024 for (p
= current_directory
; *p
;)
3026 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
3028 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
3029 && (p
[3] == 0 || SLASH_P (p
[3])))
3031 if (found_real_path
)
3033 /* Search backwards for the directory just before the "/.."
3034 and obliterate it and the "/..". */
3036 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
3039 if (q
== current_directory
)
3040 /* current_directory is
3041 a relative pathname ("can't happen"--leave it alone). */
3045 strcpy (q
- 1, p
+ 3);
3050 /* We are dealing with leading repetitions of "/..", for example
3051 "/../..", which is the Mach super-root. */
3056 found_real_path
= 1;
3061 forget_cached_source_info ();
3064 pwd_command ((char *) 0, 1);
3067 struct source_cleanup_lines_args
{
3070 char *old_pre_error
;
3071 char *old_error_pre_print
;
3075 source_cleanup_lines (args
)
3078 struct source_cleanup_lines_args
*p
=
3079 (struct source_cleanup_lines_args
*)args
;
3080 source_line_number
= p
->old_line
;
3081 source_file_name
= p
->old_file
;
3082 source_pre_error
= p
->old_pre_error
;
3083 error_pre_print
= p
->old_error_pre_print
;
3088 source_command (args
, from_tty
)
3093 struct cleanup
*old_cleanups
;
3095 struct source_cleanup_lines_args old_lines
;
3100 error ("source command requires pathname of file to source.");
3103 file
= tilde_expand (file
);
3104 old_cleanups
= make_cleanup (free
, file
);
3106 stream
= fopen (file
, FOPEN_RT
);
3109 perror_with_name (file
);
3113 make_cleanup (fclose
, stream
);
3115 old_lines
.old_line
= source_line_number
;
3116 old_lines
.old_file
= source_file_name
;
3117 old_lines
.old_pre_error
= source_pre_error
;
3118 old_lines
.old_error_pre_print
= error_pre_print
;
3119 make_cleanup (source_cleanup_lines
, &old_lines
);
3120 source_line_number
= 0;
3121 source_file_name
= file
;
3122 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3123 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3124 make_cleanup (free
, source_pre_error
);
3125 /* This will get set every time we read a line. So it won't stay "" for
3127 error_pre_print
= "";
3129 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3130 if (source_error_allocated
< needed_length
)
3132 source_error_allocated
*= 2;
3133 if (source_error_allocated
< needed_length
)
3134 source_error_allocated
= needed_length
;
3135 if (source_error
== NULL
)
3136 source_error
= xmalloc (source_error_allocated
);
3138 source_error
= xrealloc (source_error
, source_error_allocated
);
3141 read_command_file (stream
);
3143 do_cleanups (old_cleanups
);
3148 echo_command (text
, from_tty
)
3156 while ((c
= *p
++) != '\0')
3160 /* \ at end of argument is used after spaces
3161 so they won't be lost. */
3165 c
= parse_escape (&p
);
3167 printf_filtered ("%c", c
);
3170 printf_filtered ("%c", c
);
3173 /* Force this output to appear now. */
3175 gdb_flush (gdb_stdout
);
3180 dont_repeat_command (ignored
, from_tty
)
3184 *line
= 0; /* Can't call dont_repeat here because we're not
3185 necessarily reading from stdin. */
3188 /* Functions to manipulate the endianness of the target. */
3190 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3191 #ifndef TARGET_BYTE_ORDER_DEFAULT
3192 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3194 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3195 int target_byte_order_auto
= 1;
3197 static int target_byte_order_auto
= 0;
3200 /* Called if the user enters ``set endian'' without an argument. */
3202 set_endian (args
, from_tty
)
3206 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3207 show_endian (args
, from_tty
);
3210 /* Called by ``set endian big''. */
3212 set_endian_big (args
, from_tty
)
3216 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3217 target_byte_order
= BIG_ENDIAN
;
3218 target_byte_order_auto
= 0;
3220 printf_unfiltered ("Byte order is not selectable.");
3221 show_endian (args
, from_tty
);
3225 /* Called by ``set endian little''. */
3227 set_endian_little (args
, from_tty
)
3231 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3232 target_byte_order
= LITTLE_ENDIAN
;
3233 target_byte_order_auto
= 0;
3235 printf_unfiltered ("Byte order is not selectable.");
3236 show_endian (args
, from_tty
);
3240 /* Called by ``set endian auto''. */
3242 set_endian_auto (args
, from_tty
)
3246 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3247 target_byte_order_auto
= 1;
3249 printf_unfiltered ("Byte order is not selectable.");
3250 show_endian (args
, from_tty
);
3254 /* Called by ``show endian''. */
3256 show_endian (args
, from_tty
)
3261 (target_byte_order_auto
3262 ? "The target endianness is set automatically (currently %s endian)\n"
3263 : "The target is assumed to be %s endian\n");
3264 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3267 /* Set the endianness from a BFD. */
3269 set_endian_from_file (abfd
)
3272 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3275 if (bfd_big_endian (abfd
))
3278 want
= LITTLE_ENDIAN
;
3279 if (target_byte_order_auto
)
3280 target_byte_order
= want
;
3281 else if (target_byte_order
!= want
)
3282 warning ("%s endian file does not match %s endian target.",
3283 want
== BIG_ENDIAN
? "big" : "little",
3284 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3286 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3288 if (bfd_big_endian (abfd
)
3289 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3290 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3291 warning ("%s endian file does not match %s endian target.",
3292 bfd_big_endian (abfd
) ? "big" : "little",
3293 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3295 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3298 /* Functions to manipulate the architecture of the target */
3300 int target_architecture_auto
= 1;
3301 extern const bfd_arch_info_type bfd_default_arch_struct
;
3302 const bfd_arch_info_type
*target_architecture
= &bfd_default_arch_struct
;
3303 int (*target_architecture_hook
) PARAMS ((const bfd_arch_info_type
*ap
));
3307 const bfd_arch_info_type
*arch
;
3309 /* FIXME: Is it compatible with gdb? */
3310 /* Check with the target on the setting */
3311 if (target_architecture_hook
!= NULL
3312 && !target_architecture_hook (arch
))
3313 printf_unfiltered ("Target does not support `%s' architecture.\n",
3314 arch
->printable_name
);
3317 target_architecture_auto
= 0;
3318 target_architecture
= arch
;
3323 /* Called if the user enters ``set architecture'' with or without an
3326 set_architecture (args
, from_tty
)
3332 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
3334 else if (strcmp (args
, "auto") == 0)
3336 target_architecture_auto
= 1;
3340 const bfd_arch_info_type
*arch
= bfd_scan_arch (args
);
3344 printf_unfiltered ("Architecture `%s' not reconized.\n", args
);
3348 /* Called if the user enters ``show architecture'' without an argument. */
3350 show_architecture (args
, from_tty
)
3355 arch
= target_architecture
->printable_name
;
3356 if (target_architecture_auto
)
3357 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
3359 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
3362 /* Called if the user enters ``info architecture'' without an argument. */
3364 info_architecture (args
, from_tty
)
3368 enum bfd_architecture a
;
3369 printf_filtered ("Available architectures are:\n");
3370 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
3372 const bfd_arch_info_type
*ap
= bfd_lookup_arch (a
, 0);
3377 printf_filtered (" %s", ap
->printable_name
);
3381 printf_filtered ("\n");
3386 /* Set the architecture from arch/machine */
3388 set_architecture_from_arch_mach (arch
, mach
)
3389 enum bfd_architecture arch
;
3392 const bfd_arch_info_type
*wanted
= bfd_lookup_arch (arch
, mach
);
3396 fatal ("hardwired architecture/machine not reconized");
3400 /* Set the architecture from a BFD */
3402 set_architecture_from_file (abfd
)
3405 const bfd_arch_info_type
*wanted
= bfd_get_arch_info (abfd
);
3406 if (target_architecture_auto
)
3408 if (target_architecture_hook
!= NULL
3409 && !target_architecture_hook (wanted
))
3410 warning ("Target may not support %s architecture",
3411 wanted
->printable_name
);
3412 target_architecture
= wanted
;
3414 else if (wanted
!= target_architecture
)
3416 warning ("%s architecture file may be incompatible with %s target.",
3417 wanted
->printable_name
,
3418 target_architecture
->printable_name
);
3422 /* Functions to manipulate command line editing control variables. */
3424 /* Number of commands to print in each call to show_commands. */
3425 #define Hist_print 10
3427 show_commands (args
, from_tty
)
3431 /* Index for history commands. Relative to history_base. */
3434 /* Number of the history entry which we are planning to display next.
3435 Relative to history_base. */
3438 /* The first command in the history which doesn't exist (i.e. one more
3439 than the number of the last command). Relative to history_base. */
3442 extern HIST_ENTRY
*history_get
PARAMS ((int));
3444 /* Print out some of the commands from the command history. */
3445 /* First determine the length of the history list. */
3446 hist_len
= history_size
;
3447 for (offset
= 0; offset
< history_size
; offset
++)
3449 if (!history_get (history_base
+ offset
))
3458 if (args
[0] == '+' && args
[1] == '\0')
3459 /* "info editing +" should print from the stored position. */
3462 /* "info editing <exp>" should print around command number <exp>. */
3463 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3465 /* "show commands" means print the last Hist_print commands. */
3468 num
= hist_len
- Hist_print
;
3474 /* If there are at least Hist_print commands, we want to display the last
3475 Hist_print rather than, say, the last 6. */
3476 if (hist_len
- num
< Hist_print
)
3478 num
= hist_len
- Hist_print
;
3483 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3485 printf_filtered ("%5d %s\n", history_base
+ offset
,
3486 (history_get (history_base
+ offset
))->line
);
3489 /* The next command we want to display is the next one that we haven't
3493 /* If the user repeats this command with return, it should do what
3494 "show commands +" does. This is unnecessary if arg is null,
3495 because "show commands +" is not useful after "show commands". */
3496 if (from_tty
&& args
)
3503 /* Called by do_setshow_command. */
3506 set_history_size_command (args
, from_tty
, c
)
3509 struct cmd_list_element
*c
;
3511 if (history_size
== INT_MAX
)
3512 unstifle_history ();
3513 else if (history_size
>= 0)
3514 stifle_history (history_size
);
3517 history_size
= INT_MAX
;
3518 error ("History size must be non-negative");
3524 set_history (args
, from_tty
)
3528 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3529 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3534 show_history (args
, from_tty
)
3538 cmd_show_list (showhistlist
, from_tty
, "");
3541 int info_verbose
= 0; /* Default verbose msgs off */
3543 /* Called by do_setshow_command. An elaborate joke. */
3546 set_verbose (args
, from_tty
, c
)
3549 struct cmd_list_element
*c
;
3551 char *cmdname
= "verbose";
3552 struct cmd_list_element
*showcmd
;
3554 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3558 c
->doc
= "Set verbose printing of informational messages.";
3559 showcmd
->doc
= "Show verbose printing of informational messages.";
3563 c
->doc
= "Set verbosity.";
3564 showcmd
->doc
= "Show verbosity.";
3569 float_handler (signo
)
3572 /* This message is based on ANSI C, section 4.7. Note that integer
3573 divide by zero causes this, so "float" is a misnomer. */
3574 signal (SIGFPE
, float_handler
);
3575 error ("Erroneous arithmetic operation.");
3587 enablebreaklist
= NULL
;
3593 showhistlist
= NULL
;
3594 unsethistlist
= NULL
;
3595 #if MAINTENANCE_CMDS
3596 maintenancelist
= NULL
;
3597 maintenanceinfolist
= NULL
;
3598 maintenanceprintlist
= NULL
;
3600 setprintlist
= NULL
;
3601 showprintlist
= NULL
;
3602 setchecklist
= NULL
;
3603 showchecklist
= NULL
;
3606 /* Init the history buffer. Note that we are called after the init file(s)
3607 * have been read so that the user can change the history file via his
3608 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3609 * overrides all of this.
3617 tmpenv
= getenv ("HISTSIZE");
3619 history_size
= atoi (tmpenv
);
3620 else if (!history_size
)
3623 stifle_history (history_size
);
3625 tmpenv
= getenv ("GDBHISTFILE");
3627 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3628 else if (!history_filename
) {
3629 /* We include the current directory so that if the user changes
3630 directories the file written will be the same as the one
3632 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3634 read_history (history_filename
);
3640 struct cmd_list_element
*c
;
3642 add_prefix_cmd ("endian", class_support
, set_endian
,
3643 "Set endianness of target.",
3644 &endianlist
, "set endian ", 0, &setlist
);
3645 add_cmd ("big", class_support
, set_endian_big
,
3646 "Set target as being big endian.", &endianlist
);
3647 add_cmd ("little", class_support
, set_endian_little
,
3648 "Set target as being little endian.", &endianlist
);
3649 add_cmd ("auto", class_support
, set_endian_auto
,
3650 "Select target endianness automatically.", &endianlist
);
3651 add_cmd ("endian", class_support
, show_endian
,
3652 "Show endianness of target.", &showlist
);
3654 add_cmd ("architecture", class_support
, set_architecture
,
3655 "Set architecture of target.", &setlist
);
3656 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
3657 add_cmd ("architecture", class_support
, show_architecture
,
3658 "Show architecture of target.", &showlist
);
3659 add_cmd ("architecture", class_support
, info_architecture
,
3660 "List supported target architectures", &infolist
);
3663 #ifdef DEFAULT_PROMPT
3664 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3666 prompt
= savestring ("(gdb) ", 6);
3669 /* Set the important stuff up for command editing. */
3670 command_editing_p
= 1;
3671 history_expansion_p
= 0;
3672 write_history_p
= 0;
3674 /* Setup important stuff for command line editing. */
3675 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3676 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3677 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3678 rl_readline_name
= "gdb";
3680 /* Define the classes of commands.
3681 They will appear in the help list in the reverse of this order. */
3683 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3684 "Maintenance commands.\n\
3685 Some gdb commands are provided just for use by gdb maintainers.\n\
3686 These commands are subject to frequent change, and may not be as\n\
3687 well documented as user commands.",
3689 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3690 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3691 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3692 The commands in this class are those defined by the user.\n\
3693 Use the \"define\" command to define a command.", &cmdlist
);
3694 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3695 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3696 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3697 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3698 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3699 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3700 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3701 counting from zero for the innermost (currently executing) frame.\n\n\
3702 At any time gdb identifies one frame as the \"selected\" frame.\n\
3703 Variable lookups are done with respect to the selected frame.\n\
3704 When the program being debugged stops, gdb selects the innermost frame.\n\
3705 The commands below can be used to select other frames by number or address.",
3707 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3709 add_com ("pwd", class_files
, pwd_command
,
3710 "Print working directory. This is used for your program as well.");
3711 c
= add_cmd ("cd", class_files
, cd_command
,
3712 "Set working directory to DIR for debugger and program being debugged.\n\
3713 The change does not take effect for the program being debugged\n\
3714 until the next time it is started.", &cmdlist
);
3715 c
->completer
= filename_completer
;
3718 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3723 add_com ("echo", class_support
, echo_command
,
3724 "Print a constant string. Give string as argument.\n\
3725 C escape sequences may be used in the argument.\n\
3726 No newline is added at the end of the argument;\n\
3727 use \"\\n\" if you want a newline to be printed.\n\
3728 Since leading and trailing whitespace are ignored in command arguments,\n\
3729 if you want to print some you must use \"\\\" before leading whitespace\n\
3730 to be printed or after trailing whitespace.");
3731 add_com ("document", class_support
, document_command
,
3732 "Document a user-defined command.\n\
3733 Give command name as argument. Give documentation on following lines.\n\
3734 End with a line of just \"end\".");
3735 add_com ("define", class_support
, define_command
,
3736 "Define a new command name. Command name is argument.\n\
3737 Definition appears on following lines, one command per line.\n\
3738 End with a line of just \"end\".\n\
3739 Use the \"document\" command to give documentation for the new command.\n\
3740 Commands defined in this way may have up to ten arguments.");
3743 c
= add_cmd ("source", class_support
, source_command
,
3744 "Read commands from a file named FILE.\n\
3745 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3746 when gdb is started.", &cmdlist
);
3748 /* Punt file name, we can't help it easily. */
3749 c
= add_cmd ("source", class_support
, source_command
,
3750 "Read commands from a file named FILE.\n\
3751 Note that the file \".gdbinit\" is read automatically in this way\n\
3752 when gdb is started.", &cmdlist
);
3754 c
->completer
= filename_completer
;
3756 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3757 add_com ("help", class_support
, help_command
, "Print list of commands.");
3758 add_com_alias ("q", "quit", class_support
, 1);
3759 add_com_alias ("h", "help", class_support
, 1);
3761 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3762 Primarily used inside of user-defined commands that should not be repeated when\n\
3765 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3768 add_show_from_set (c
, &showlist
);
3769 c
->function
.sfunc
= set_verbose
;
3770 set_verbose (NULL
, 0, c
);
3773 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3774 "Set editing of command lines as they are typed.\n\
3775 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
3776 Without an argument, command line editing is enabled. To edit, use\n\
3777 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3780 add_prefix_cmd ("history", class_support
, set_history
,
3781 "Generic command for setting command history parameters.",
3782 &sethistlist
, "set history ", 0, &setlist
);
3783 add_prefix_cmd ("history", class_support
, show_history
,
3784 "Generic command for showing command history parameters.",
3785 &showhistlist
, "show history ", 0, &showlist
);
3788 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3789 "Set history expansion on command input.\n\
3790 Without an argument, history expansion is enabled.", &sethistlist
),
3794 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3795 "Set saving of the history record on exit.\n\
3796 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
3797 Without an argument, saving is enabled.", &sethistlist
),
3800 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3801 "Set the size of the command history, \n\
3802 ie. the number of previous commands to keep a record of.", &sethistlist
);
3803 add_show_from_set (c
, &showhistlist
);
3804 c
->function
.sfunc
= set_history_size_command
;
3807 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3808 "Set the filename in which to record the command history\n\
3809 (the list of previous commands of which a record is kept).", &sethistlist
),
3813 (add_set_cmd ("confirm", class_support
, var_boolean
,
3815 "Set whether to confirm potentially dangerous operations.",
3819 add_prefix_cmd ("info", class_info
, info_command
,
3820 "Generic command for showing things about the program being debugged.",
3821 &infolist
, "info ", 0, &cmdlist
);
3822 add_com_alias ("i", "info", class_info
, 1);
3824 add_com ("complete", class_obscure
, complete_command
,
3825 "List the completions for the rest of the line as a command.");
3827 add_prefix_cmd ("show", class_info
, show_command
,
3828 "Generic command for showing things about the debugger.",
3829 &showlist
, "show ", 0, &cmdlist
);
3830 /* Another way to get at the same thing. */
3831 add_info ("set", show_command
, "Show all GDB settings.");
3833 add_cmd ("commands", no_class
, show_commands
,
3834 "Show the history of commands you typed.\n\
3835 You can supply a command number to start with, or a `+' to start after\n\
3836 the previous command number shown.",
3839 add_cmd ("version", no_class
, show_version
,
3840 "Show what version of GDB this is.", &showlist
);
3842 add_com ("while", class_support
, while_command
,
3843 "Execute nested commands WHILE the conditional expression is non zero.\n\
3844 The conditional expression must follow the word `while' and must in turn be\n\
3845 followed by a new line. The nested commands must be entered one per line,\n\
3846 and should be terminated by the word `end'.");
3848 add_com ("if", class_support
, if_command
,
3849 "Execute nested commands once IF the conditional expression is non zero.\n\
3850 The conditional expression must follow the word `if' and must in turn be\n\
3851 followed by a new line. The nested commands must be entered one per line,\n\
3852 and should be terminated by the word 'else' or `end'. If an else clause\n\
3853 is used, the same rules apply to its nested commands as to the first ones.");
3855 /* If target is open when baud changes, it doesn't take effect until the
3856 next open (I think, not sure). */
3857 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3858 var_zinteger
, (char *)&baud_rate
,
3859 "Set baud rate for remote serial I/O.\n\
3860 This value is used to set the speed of the serial port when debugging\n\
3861 using remote targets.", &setlist
),
3865 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3866 "Set debugging of remote protocol.\n\
3867 When enabled, each packet sent or received with the remote target\n\
3868 is displayed.", &setlist
),
3872 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3873 "Set timeout limit to wait for target to respond.\n\
3874 This value is used to set the time limit for gdb to wait for a response\n\
3875 from he target.", &setlist
),
3878 c
= add_set_cmd ("annotate", class_obscure
, var_zinteger
,
3879 (char *)&annotation_level
, "Set annotation_level.\n\
3880 0 == normal; 1 == fullname (for use when running under emacs)\n\
3881 2 == output annotated suitably for use by programs that control GDB.",
3883 c
= add_show_from_set (c
, &showlist
);