1 /* Top level `main' program for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "call-cmds.h"
28 #include "breakpoint.h"
30 #include "expression.h"
32 #include "terminal.h" /* For job_control. */
36 /* readline include files */
40 /* readline defines this. */
44 #include <sys/types.h>
53 #include <sys/param.h>
57 #ifdef SET_STACK_LIMIT_HUGE
59 #include <sys/resource.h>
61 int original_stack_limit
;
64 /* Prototypes for local functions */
67 symbol_completion_function
PARAMS ((char *, int));
70 command_loop
PARAMS ((void));
73 command_loop_marker
PARAMS ((int));
76 print_gdb_version
PARAMS ((GDB_FILE
*));
79 quit_command
PARAMS ((char *, int));
82 init_main
PARAMS ((void));
85 init_history
PARAMS ((void));
88 init_cmd_lists
PARAMS ((void));
91 float_handler
PARAMS ((int));
94 source_command
PARAMS ((char *, int));
96 static void cd_command
PARAMS ((char *, int));
99 print_gnu_advertisement
PARAMS ((void));
102 init_signals
PARAMS ((void));
105 read_command_file
PARAMS ((FILE *));
108 set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
111 show_history
PARAMS ((char *, int));
114 set_history
PARAMS ((char *, int));
117 set_history_size_command
PARAMS ((char *, int, struct cmd_list_element
*));
120 show_commands
PARAMS ((char *, int));
123 echo_command
PARAMS ((char *, int));
126 pwd_command
PARAMS ((char *, int));
129 show_version
PARAMS ((char *, int));
132 document_command
PARAMS ((char *, int));
135 define_command
PARAMS ((char *, int));
138 validate_comname
PARAMS ((char *));
141 help_command
PARAMS ((char *, int));
144 show_command
PARAMS ((char *, int));
147 info_command
PARAMS ((char *, int));
150 do_nothing
PARAMS ((int));
153 quit_cover
PARAMS ((char *));
156 disconnect
PARAMS ((int));
159 source_cleanup
PARAMS ((FILE *));
161 /* If this definition isn't overridden by the header files, assume
162 that isatty and fileno exist on this system. */
164 #define ISATTY(FP) (isatty (fileno (FP)))
167 /* Initialization file name for gdb. This is overridden in some configs. */
169 #ifndef GDBINIT_FILENAME
170 #define GDBINIT_FILENAME ".gdbinit"
172 static char gdbinit
[] = GDBINIT_FILENAME
;
173 static int inhibit_gdbinit
= 0;
175 #define ALL_CLEANUPS ((struct cleanup *)0)
177 /* Version number of GDB, as a string. */
179 extern char *version
;
181 /* Canonical host name as a string. */
183 extern char *host_name
;
185 /* Canonical target name as a string. */
187 extern char *target_name
;
189 extern char lang_frame_mismatch_warn
[]; /* language.c */
191 /* Flag for whether we want all the "from_tty" gubbish printed. */
193 int caution
= 1; /* Default is yes, sigh. */
196 * Define all cmd_list_element's
199 /* Chain containing all defined commands. */
201 struct cmd_list_element
*cmdlist
;
203 /* Chain containing all defined info subcommands. */
205 struct cmd_list_element
*infolist
;
207 /* Chain containing all defined enable subcommands. */
209 struct cmd_list_element
*enablelist
;
211 /* Chain containing all defined disable subcommands. */
213 struct cmd_list_element
*disablelist
;
215 /* Chain containing all defined delete subcommands. */
217 struct cmd_list_element
*deletelist
;
219 /* Chain containing all defined "enable breakpoint" subcommands. */
221 struct cmd_list_element
*enablebreaklist
;
223 /* Chain containing all defined set subcommands */
225 struct cmd_list_element
*setlist
;
227 /* Chain containing all defined unset subcommands */
229 struct cmd_list_element
*unsetlist
;
231 /* Chain containing all defined show subcommands. */
233 struct cmd_list_element
*showlist
;
235 /* Chain containing all defined \"set history\". */
237 struct cmd_list_element
*sethistlist
;
239 /* Chain containing all defined \"show history\". */
241 struct cmd_list_element
*showhistlist
;
243 /* Chain containing all defined \"unset history\". */
245 struct cmd_list_element
*unsethistlist
;
247 /* Chain containing all defined maintenance subcommands. */
250 struct cmd_list_element
*maintenancelist
;
253 /* Chain containing all defined "maintenance info" subcommands. */
256 struct cmd_list_element
*maintenanceinfolist
;
259 /* Chain containing all defined "maintenance print" subcommands. */
262 struct cmd_list_element
*maintenanceprintlist
;
265 struct cmd_list_element
*setprintlist
;
267 struct cmd_list_element
*showprintlist
;
269 struct cmd_list_element
*setchecklist
;
271 struct cmd_list_element
*showchecklist
;
273 /* stdio stream that command input is being read from. Set to stdin normally.
274 Set by source_command to the file we are sourcing. Set to NULL if we are
275 executing a user-defined command. */
279 /* Current working directory. */
281 char *current_directory
;
283 /* The directory name is actually stored here (usually). */
284 static char dirbuf
[1024];
286 /* Function to call before reading a command, if nonzero.
287 The function receives two args: an input stream,
288 and a prompt string. */
290 void (*window_hook
) PARAMS ((FILE *, char *));
292 extern int mapped_symbol_files
;
293 extern int readnow_symbol_files
;
298 /* gdb prints this when reading a command interactively */
301 /* Buffer used for reading command lines, and the size
302 allocated for it so far. */
307 /* Baud rate specified for talking to serial target systems. Default
308 is left as -1, so targets can choose their own defaults. */
309 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
310 or (unsigned int)-1. This is a Bad User Interface. */
314 /* Non-zero tells remote* modules to output debugging info. */
316 int remote_debug
= 0;
318 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
322 #define STOP_SIGNAL SIGTSTP
323 static void stop_sig
PARAMS ((int));
327 /* Some System V have job control but not sigsetmask(). */
328 #if !defined (HAVE_SIGSETMASK)
330 #define HAVE_SIGSETMASK 1
332 #define HAVE_SIGSETMASK 0
336 #if 0 == (HAVE_SIGSETMASK)
337 #define sigsetmask(n)
340 /* Where to go for return_to_top_level (RETURN_ERROR). */
341 static jmp_buf error_return
;
342 /* Where to go for return_to_top_level (RETURN_QUIT). */
343 static jmp_buf quit_return
;
345 /* Temporary variable for SET_TOP_LEVEL. */
346 static int top_level_val
;
348 /* Do a setjmp on error_return and quit_return. catch_errors is
349 generally a cleaner way to do this, but main() would look pretty
350 ugly if it had to use catch_errors each time. */
352 #define SET_TOP_LEVEL() \
353 (((top_level_val = setjmp (error_return)) \
354 ? (PTR) 0 : (PTR) memcpy (quit_return, error_return, sizeof (jmp_buf))) \
357 /* Return for reason REASON. This generally gets back to the command
358 loop, but can be caught via catch_errors. */
361 return_to_top_level (reason
)
362 enum return_reason reason
;
367 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
368 I can think of a reason why that is vital, though). */
369 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
371 disable_current_display ();
372 do_cleanups (ALL_CLEANUPS
);
373 (NORETURN
void) longjmp
374 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
377 /* Call FUNC with arg ARGS, catching any errors. If there is no
378 error, return the value returned by FUNC. If there is an error,
379 print ERRSTRING, print the specific error message, then return
382 Must not be called with immediate_quit in effect (bad things might
383 happen, say we got a signal in the middle of a memcpy to quit_return).
384 This is an OK restriction; with very few exceptions immediate_quit can
385 be replaced by judicious use of QUIT.
387 MASK specifies what to catch; it is normally set to
388 RETURN_MASK_ALL, if for no other reason than that the code which
389 calls catch_errors might not be set up to deal with a quit which
390 isn't caught. But if the code can deal with it, it generally
391 should be RETURN_MASK_ERROR, unless for some reason it is more
392 useful to abort only the portion of the operation inside the
393 catch_errors. Note that quit should return to the command line
394 fairly quickly, even if some further processing is being done. */
397 catch_errors (func
, args
, errstring
, mask
)
398 int (*func
) PARAMS ((char *));
407 struct cleanup
*saved_cleanup_chain
;
408 char *saved_error_pre_print
;
410 saved_cleanup_chain
= save_cleanups ();
411 saved_error_pre_print
= error_pre_print
;
413 if (mask
& RETURN_MASK_ERROR
)
414 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
415 if (mask
& RETURN_MASK_QUIT
)
416 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
417 error_pre_print
= errstring
;
419 if (setjmp (tmp_jmp
) == 0)
421 if (mask
& RETURN_MASK_ERROR
)
422 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
423 if (mask
& RETURN_MASK_QUIT
)
424 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
425 val
= (*func
) (args
);
430 restore_cleanups (saved_cleanup_chain
);
432 error_pre_print
= saved_error_pre_print
;
433 if (mask
& RETURN_MASK_ERROR
)
434 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
435 if (mask
& RETURN_MASK_QUIT
)
436 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
440 /* Handler for SIGHUP. */
446 catch_errors (quit_cover
, NULL
,
447 "Could not kill the program being debugged", RETURN_MASK_ALL
);
448 signal (SIGHUP
, SIG_DFL
);
449 kill (getpid (), SIGHUP
);
452 /* Just a little helper function for disconnect(). */
458 caution
= 0; /* Throw caution to the wind -- we're exiting.
459 This prevents asking the user dumb questions. */
460 quit_command((char *)0, 0);
464 /* Line number we are currently in in a file which is being sourced. */
465 static int source_line_number
;
467 /* Name of the file we are sourcing. */
468 static char *source_file_name
;
470 /* Buffer containing the error_pre_print used by the source stuff.
472 static char *source_error
;
473 static int source_error_allocated
;
475 /* Something to glom on to the start of error_pre_print if source_file_name
477 static char *source_pre_error
;
479 /* Clean up on error during a "source" command (or execution of a
480 user-defined command). */
483 source_cleanup (stream
)
486 /* Restore the previous input stream. */
490 /* Read commands from STREAM. */
492 read_command_file (stream
)
495 struct cleanup
*cleanups
;
497 cleanups
= make_cleanup (source_cleanup
, instream
);
500 do_cleanups (cleanups
);
509 static int quiet
= 0;
510 static int batch
= 0;
512 /* Pointers to various arguments from command line. */
514 char *execarg
= NULL
;
515 char *corearg
= NULL
;
519 /* These are static so that we can take their address in an initializer. */
520 static int print_help
;
521 static int print_version
;
523 /* Pointers to all arguments of --command option. */
525 /* Allocated size of cmdarg. */
527 /* Number of elements of cmdarg used. */
530 /* Indices of all arguments of --directory option. */
532 /* Allocated size. */
534 /* Number of elements used. */
537 struct stat homebuf
, cwdbuf
;
538 char *homedir
, *homeinit
;
542 /* This needs to happen before the first use of malloc. */
543 init_malloc ((PTR
) NULL
);
545 #if defined (ALIGN_STACK_ON_STARTUP)
546 i
= (int) &count
& 0x3;
551 /* If error() is called from initialization code, just exit */
552 if (SET_TOP_LEVEL ()) {
557 cmdarg
= (char **) xmalloc (cmdsize
* sizeof (*cmdarg
));
560 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
564 line
= (char *) xmalloc (linesize
);
565 line
[0] = '\0'; /* Terminate saved (now empty) cmd line */
568 getcwd (dirbuf
, sizeof (dirbuf
));
569 current_directory
= dirbuf
;
571 #ifdef SET_STACK_LIMIT_HUGE
575 /* Set the stack limit huge so that alloca (particularly stringtab
576 * in dbxread.c) does not fail. */
577 getrlimit (RLIMIT_STACK
, &rlim
);
578 original_stack_limit
= rlim
.rlim_cur
;
579 rlim
.rlim_cur
= rlim
.rlim_max
;
580 setrlimit (RLIMIT_STACK
, &rlim
);
582 #endif /* SET_STACK_LIMIT_HUGE */
584 /* Parse arguments and options. */
587 /* When var field is 0, use flag field to record the equivalent
588 short option (or arbitrary numbers starting at 10 for those
589 with no equivalent). */
590 static struct option long_options
[] =
592 {"readnow", no_argument
, &readnow_symbol_files
, 1},
593 {"r", no_argument
, &readnow_symbol_files
, 1},
594 {"mapped", no_argument
, &mapped_symbol_files
, 1},
595 {"m", no_argument
, &mapped_symbol_files
, 1},
596 {"quiet", no_argument
, &quiet
, 1},
597 {"q", no_argument
, &quiet
, 1},
598 {"silent", no_argument
, &quiet
, 1},
599 {"nx", no_argument
, &inhibit_gdbinit
, 1},
600 {"n", no_argument
, &inhibit_gdbinit
, 1},
601 {"batch", no_argument
, &batch
, 1},
602 {"epoch", no_argument
, &epoch_interface
, 1},
603 {"fullname", no_argument
, &frame_file_full_name
, 1},
604 {"f", no_argument
, &frame_file_full_name
, 1},
605 {"help", no_argument
, &print_help
, 1},
606 {"se", required_argument
, 0, 10},
607 {"symbols", required_argument
, 0, 's'},
608 {"s", required_argument
, 0, 's'},
609 {"exec", required_argument
, 0, 'e'},
610 {"e", required_argument
, 0, 'e'},
611 {"core", required_argument
, 0, 'c'},
612 {"c", required_argument
, 0, 'c'},
613 {"command", required_argument
, 0, 'x'},
614 {"version", no_argument
, &print_version
, 1},
615 {"x", required_argument
, 0, 'x'},
616 {"directory", required_argument
, 0, 'd'},
617 {"cd", required_argument
, 0, 11},
618 {"tty", required_argument
, 0, 't'},
619 {"baud", required_argument
, 0, 'b'},
620 {"b", required_argument
, 0, 'b'},
621 /* Allow machine descriptions to add more options... */
622 #ifdef ADDITIONAL_OPTIONS
625 {0, no_argument
, 0, 0},
632 c
= getopt_long_only (argc
, argv
, "",
633 long_options
, &option_index
);
637 /* Long option that takes an argument. */
638 if (c
== 0 && long_options
[option_index
].flag
== 0)
639 c
= long_options
[option_index
].val
;
644 /* Long option that just sets a flag. */
663 cmdarg
[ncmd
++] = optarg
;
667 cmdarg
= (char **) xrealloc ((char *)cmdarg
,
668 cmdsize
* sizeof (*cmdarg
));
672 dirarg
[ndir
++] = optarg
;
676 dirarg
= (char **) xrealloc ((char *)dirarg
,
677 dirsize
* sizeof (*dirarg
));
691 i
= strtol (optarg
, &p
, 0);
692 if (i
== 0 && p
== optarg
)
693 warning ("Could not set baud rate to `%s'.\n", optarg
);
699 #ifdef ADDITIONAL_OPTION_CASES
700 ADDITIONAL_OPTION_CASES
703 fprintf_unfiltered (gdb_stderr
,
704 "Use `%s --help' for a complete list of options.\n",
710 /* OK, that's all the options. The other arguments are filenames. */
712 for (; optind
< argc
; optind
++)
716 symarg
= argv
[optind
];
717 execarg
= argv
[optind
];
720 corearg
= argv
[optind
];
723 fprintf_unfiltered (gdb_stderr
,
724 "Excess command line arguments ignored. (%s%s)\n",
725 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
732 /* Run the init function of each source file */
734 init_cmd_lists (); /* This needs to be done first */
735 initialize_all_files ();
736 init_main (); /* But that omits this file! Do it now */
739 /* Do these (and anything which might call wrap_here or *_filtered)
740 after initialize_all_files. */
743 print_gdb_version (gdb_stdout
);
745 printf_filtered ("\n");
751 /* --version is intentionally not documented here, because we
752 are printing the version here, and the help is long enough
755 print_gdb_version (gdb_stdout
);
756 /* Make sure the output gets printed. */
758 printf_filtered ("\n");
760 /* But don't use *_filtered here. We don't want to prompt for continue
761 no matter how small the screen or how much we're going to print. */
763 This is the GNU debugger. Usage:\n\
764 gdb [options] [executable-file [core-file or process-id]]\n\
766 --help Print this message.\n\
767 --quiet Do not print version number on startup.\n\
768 --fullname Output information used by emacs-GDB interface.\n\
769 --epoch Output information used by epoch emacs-GDB interface.\n\
770 --batch Exit after processing options.\n\
771 --nx Do not read .gdbinit file.\n\
772 --tty=TTY Use TTY for input/output by the program being debugged.\n\
773 --cd=DIR Change current directory to DIR.\n\
774 --directory=DIR Search for source files in DIR.\n\
775 --command=FILE Execute GDB commands from FILE.\n\
776 --symbols=SYMFILE Read symbols from SYMFILE.\n\
777 --exec=EXECFILE Use EXECFILE as the executable.\n\
778 --se=FILE Use FILE as symbol file and executable file.\n\
779 --core=COREFILE Analyze the core dump COREFILE.\n\
780 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
781 --mapped Use mapped symbol files if supported on this system.\n\
782 --readnow Fully read symbol files on first access.\n\
784 #ifdef ADDITIONAL_OPTION_HELP
785 fputs_unfiltered (ADDITIONAL_OPTION_HELP
, gdb_stdout
);
787 fputs_unfiltered ("\n\
788 For more information, type \"help\" from within GDB, or consult the\n\
789 GDB manual (available as on-line info or a printed manual).\n", gdb_stdout
);
795 /* Print all the junk at the top, with trailing "..." if we are about
796 to read a symbol file (possibly slowly). */
797 print_gnu_advertisement ();
798 print_gdb_version (gdb_stdout
);
800 printf_filtered ("..");
802 gdb_flush (gdb_stdout
); /* Force to screen during slow operations */
805 error_pre_print
= "\n\n";
806 /* We may get more than one warning, don't double space all of them... */
807 warning_pre_print
= "\nwarning: ";
809 /* We need a default language for parsing expressions, so simple things like
810 "set width 0" won't fail if no language is explicitly set in a config file
811 or implicitly set by reading an executable during startup. */
812 set_language (language_c
);
813 expected_language
= current_language
; /* don't warn about the change. */
815 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
816 *before* all the command line arguments are processed; it sets
817 global parameters, which are independent of what file you are
818 debugging or what directory you are in. */
819 homedir
= getenv ("HOME");
822 homeinit
= (char *) alloca (strlen (getenv ("HOME")) +
823 strlen (gdbinit
) + 10);
824 strcpy (homeinit
, getenv ("HOME"));
825 strcat (homeinit
, "/");
826 strcat (homeinit
, gdbinit
);
827 if (!inhibit_gdbinit
&& access (homeinit
, R_OK
) == 0)
829 if (!SET_TOP_LEVEL ())
830 source_command (homeinit
, 0);
832 do_cleanups (ALL_CLEANUPS
);
834 /* Do stats; no need to do them elsewhere since we'll only
835 need them if homedir is set. Make sure that they are
836 zero in case one of them fails (this guarantees that they
837 won't match if either exists). */
839 memset (&homebuf
, 0, sizeof (struct stat
));
840 memset (&cwdbuf
, 0, sizeof (struct stat
));
842 stat (homeinit
, &homebuf
);
843 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
847 /* Now perform all the actions indicated by the arguments. */
850 if (!SET_TOP_LEVEL ())
852 cd_command (cdarg
, 0);
856 do_cleanups (ALL_CLEANUPS
);
858 for (i
= 0; i
< ndir
; i
++)
859 if (!SET_TOP_LEVEL ())
860 directory_command (dirarg
[i
], 0);
862 do_cleanups (ALL_CLEANUPS
);
866 && STREQ (execarg
, symarg
))
868 /* The exec file and the symbol-file are the same. If we can't open
869 it, better only print one error message. */
870 if (!SET_TOP_LEVEL ())
872 exec_file_command (execarg
, !batch
);
873 symbol_file_command (symarg
, 0);
879 if (!SET_TOP_LEVEL ())
880 exec_file_command (execarg
, !batch
);
882 if (!SET_TOP_LEVEL ())
883 symbol_file_command (symarg
, 0);
885 do_cleanups (ALL_CLEANUPS
);
887 /* After the symbol file has been read, print a newline to get us
888 beyond the copyright line... But errors should still set off
889 the error message with a (single) blank line. */
891 printf_filtered ("\n");
892 error_pre_print
= "\n";
893 warning_pre_print
= "\nwarning: ";
896 if (!SET_TOP_LEVEL ())
897 core_file_command (corearg
, !batch
);
898 else if (isdigit (corearg
[0]) && !SET_TOP_LEVEL ())
899 attach_command (corearg
, !batch
);
900 do_cleanups (ALL_CLEANUPS
);
903 if (!SET_TOP_LEVEL ())
904 tty_command (ttyarg
, !batch
);
905 do_cleanups (ALL_CLEANUPS
);
907 #ifdef ADDITIONAL_OPTION_HANDLER
908 ADDITIONAL_OPTION_HANDLER
;
911 /* Error messages should no longer be distinguished with extra output. */
913 warning_pre_print
= "warning: ";
915 /* Read the .gdbinit file in the current directory, *if* it isn't
916 the same as the $HOME/.gdbinit file (it should exist, also). */
919 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
, sizeof (struct stat
)))
920 if (!inhibit_gdbinit
&& access (gdbinit
, R_OK
) == 0)
922 if (!SET_TOP_LEVEL ())
923 source_command (gdbinit
, 0);
925 do_cleanups (ALL_CLEANUPS
);
927 for (i
= 0; i
< ncmd
; i
++)
929 if (!SET_TOP_LEVEL ())
931 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
932 read_command_file (stdin
);
934 source_command (cmdarg
[i
], !batch
);
935 do_cleanups (ALL_CLEANUPS
);
940 /* Read in the old history after all the command files have been read. */
945 /* We have hit the end of the batch file. */
949 /* Do any host- or target-specific hacks. This is used for i960 targets
950 to force the user to set a nindy target and spec its parameters. */
952 #ifdef BEFORE_MAIN_LOOP_HOOK
953 BEFORE_MAIN_LOOP_HOOK
;
956 /* The command loop. */
960 if (!SET_TOP_LEVEL ())
962 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
964 quit_command ((char *)0, instream
== stdin
);
967 /* No exit -- exit is through quit_command. */
971 execute_user_command (c
, args
)
972 struct cmd_list_element
*c
;
975 register struct command_line
*cmdlines
;
976 struct cleanup
*old_chain
;
979 error ("User-defined commands cannot take arguments.");
981 cmdlines
= c
->user_commands
;
986 /* Set the instream to 0, indicating execution of a
987 user-defined function. */
988 old_chain
= make_cleanup (source_cleanup
, instream
);
989 instream
= (FILE *) 0;
992 execute_command (cmdlines
->line
, 0);
993 cmdlines
= cmdlines
->next
;
995 do_cleanups (old_chain
);
998 /* Execute the line P as a command.
999 Pass FROM_TTY as second argument to the defining function. */
1002 execute_command (p
, from_tty
)
1006 register struct cmd_list_element
*c
;
1007 register enum language flang
;
1008 static int warned
= 0;
1012 /* This can happen when command_line_input hits end of file. */
1016 while (*p
== ' ' || *p
== '\t') p
++;
1021 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1022 /* Pass null arg rather than an empty one. */
1025 /* If this command has been hooked, run the hook first. */
1027 execute_user_command (c
->hook
, (char *)0);
1029 if (c
->class == class_user
)
1030 execute_user_command (c
, arg
);
1031 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1032 do_setshow_command (arg
, from_tty
& caution
, c
);
1033 else if (c
->function
.cfunc
== NO_FUNCTION
)
1034 error ("That is not a command, just a help topic.");
1036 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1039 /* Tell the user if the language has changed (except first time). */
1040 if (current_language
!= expected_language
)
1042 if (language_mode
== language_mode_auto
) {
1043 language_info (1); /* Print what changed. */
1048 /* Warn the user if the working language does not match the
1049 language of the current frame. Only warn the user if we are
1050 actually running the program, i.e. there is a stack. */
1051 /* FIXME: This should be cacheing the frame and only running when
1052 the frame changes. */
1053 if (target_has_stack
)
1055 flang
= get_frame_language ();
1057 && flang
!= language_unknown
1058 && flang
!= current_language
->la_language
)
1060 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1068 command_loop_marker (foo
)
1073 /* Read commands from `instream' and execute them
1074 until end of file or error reading instream. */
1078 struct cleanup
*old_chain
;
1080 int stdin_is_tty
= ISATTY (stdin
);
1082 while (!feof (instream
))
1084 if (window_hook
&& instream
== stdin
)
1085 (*window_hook
) (instream
, prompt
);
1088 if (instream
== stdin
&& stdin_is_tty
)
1089 reinitialize_more_filter ();
1090 old_chain
= make_cleanup (command_loop_marker
, 0);
1091 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1095 execute_command (command
, instream
== stdin
);
1096 /* Do any commands attached to breakpoint we stopped at. */
1097 bpstat_do_actions (&stop_bpstat
);
1098 do_cleanups (old_chain
);
1102 /* Commands call this if they do not want to be repeated by null lines. */
1107 /* If we aren't reading from standard input, we are saving the last
1108 thing read from stdin in line and don't want to delete it. Null lines
1109 won't repeat here in any case. */
1110 if (instream
== stdin
)
1114 /* Read a line from the stream "instream" without command line editing.
1116 It prints PRROMPT once at the start.
1117 Action is compatible with "readline", e.g. space for the result is
1118 malloc'd and should be freed by the caller.
1120 A NULL return means end of file. */
1122 gdb_readline (prrompt
)
1127 int input_index
= 0;
1128 int result_size
= 80;
1132 /* Don't use a _filtered function here. It causes the assumed
1133 character position to be off, since the newline we read from
1134 the user is not accounted for. */
1135 fputs_unfiltered (prrompt
, gdb_stdout
);
1136 gdb_flush (gdb_stdout
);
1139 result
= (char *) xmalloc (result_size
);
1143 /* Read from stdin if we are executing a user defined command.
1144 This is the right thing for prompt_for_continue, at least. */
1145 c
= fgetc (instream
? instream
: stdin
);
1149 if (input_index
> 0)
1150 /* The last line does not end with a newline. Return it, and
1151 if we are called again fgetc will still return EOF and
1152 we'll return NULL then. */
1161 result
[input_index
++] = c
;
1162 while (input_index
>= result_size
)
1165 result
= (char *) xrealloc (result
, result_size
);
1169 result
[input_index
++] = '\0';
1173 /* Variables which control command line editing and history
1174 substitution. These variables are given default values at the end
1176 static int command_editing_p
;
1177 static int history_expansion_p
;
1178 static int write_history_p
;
1179 static int history_size
;
1180 static char *history_filename
;
1182 /* readline uses the word breaks for two things:
1183 (1) In figuring out where to point the TEXT parameter to the
1184 rl_completion_entry_function. Since we don't use TEXT for much,
1185 it doesn't matter a lot what the word breaks are for this purpose, but
1186 it does affect how much stuff M-? lists.
1187 (2) If one of the matches contains a word break character, readline
1188 will quote it. That's why we switch between
1189 gdb_completer_word_break_characters and
1190 gdb_completer_command_word_break_characters. I'm not sure when
1191 we need this behavior (perhaps for funky characters in C++ symbols?). */
1193 /* Variables which are necessary for fancy command line editing. */
1194 char *gdb_completer_word_break_characters
=
1195 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1197 /* When completing on command names, we remove '-' from the list of
1198 word break characters, since we use it in command names. If the
1199 readline library sees one in any of the current completion strings,
1200 it thinks that the string needs to be quoted and automatically supplies
1202 char *gdb_completer_command_word_break_characters
=
1203 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1205 /* Characters that can be used to quote completion strings. Note that we
1206 can't include '"' because the gdb C parser treats such quoted sequences
1208 char *gdb_completer_quote_characters
=
1211 /* Functions that are used as part of the fancy command line editing. */
1213 /* This can be used for functions which don't want to complete on symbols
1214 but don't want to complete on anything else either. */
1217 noop_completer (text
, prefix
)
1224 /* Complete on filenames. */
1226 filename_completer (text
, word
)
1230 /* From readline. */
1231 extern char *filename_completion_function ();
1232 int subsequent_name
;
1234 int return_val_used
;
1235 int return_val_alloced
;
1237 return_val_used
= 0;
1238 /* Small for testing. */
1239 return_val_alloced
= 1;
1240 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1242 subsequent_name
= 0;
1246 p
= filename_completion_function (text
, subsequent_name
);
1247 if (return_val_used
>= return_val_alloced
)
1249 return_val_alloced
*= 2;
1251 (char **) xrealloc (return_val
,
1252 return_val_alloced
* sizeof (char *));
1256 return_val
[return_val_used
++] = p
;
1259 /* Like emacs, don't complete on old versions. Especially useful
1260 in the "source" command. */
1261 if (p
[strlen (p
) - 1] == '~')
1267 /* Return exactly p. */
1268 return_val
[return_val_used
++] = p
;
1269 else if (word
> text
)
1271 /* Return some portion of p. */
1272 q
= xmalloc (strlen (p
) + 5);
1273 strcpy (q
, p
+ (word
- text
));
1274 return_val
[return_val_used
++] = q
;
1279 /* Return some of TEXT plus p. */
1280 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1281 strncpy (q
, word
, text
- word
);
1282 q
[text
- word
] = '\0';
1284 return_val
[return_val_used
++] = q
;
1288 subsequent_name
= 1;
1291 /* There is no way to do this just long enough to affect quote inserting
1292 without also affecting the next completion. This should be fixed in
1294 /* Insure that readline does the right thing
1295 with respect to inserting quotes. */
1296 rl_completer_word_break_characters
= "";
1301 /* Here are some useful test cases for completion. FIXME: These should
1302 be put in the test suite. They should be tested with both M-? and TAB.
1304 "show output-" "radix"
1305 "show output" "-radix"
1306 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1307 "p " ambiguous (all symbols)
1308 "info t foo" no completions
1309 "info t " no completions
1310 "info t" ambiguous ("info target", "info terminal", etc.)
1311 "info ajksdlfk" no completions
1312 "info ajksdlfk " no completions
1314 "info " ambiguous (all info commands)
1315 "p \"a" no completions (string constant)
1316 "p 'a" ambiguous (all symbols starting with a)
1317 "p b-a" ambiguous (all symbols starting with a)
1318 "p b-" ambiguous (all symbols)
1319 "file Make" "file" (word break hard to screw up here)
1320 "file ../gdb.stabs/wi" "erd" (needs to not break word at slash)
1323 /* Generate completions one by one for the completer. Each time we are
1324 called return another potential completion to the caller. The function
1325 is misnamed; it just completes on commands or passes the buck to the
1326 command's completer function; the stuff specific to symbol completion
1327 is in make_symbol_completion_list.
1329 TEXT is readline's idea of the "word" we are looking at; we don't really
1330 like readline's ideas about word breaking so we ignore it.
1332 MATCHES is the number of matches that have currently been collected from
1333 calling this completion function. When zero, then we need to initialize,
1334 otherwise the initialization has already taken place and we can just
1335 return the next potential completion string.
1337 Returns NULL if there are no more completions, else a pointer to a string
1338 which is a possible completion.
1340 RL_LINE_BUFFER is available to be looked at; it contains the entire text
1341 of the line. RL_POINT is the offset in that line of the cursor. You
1342 should pretend that the line ends at RL_POINT. */
1345 symbol_completion_function (text
, matches
)
1349 static char **list
= (char **)NULL
; /* Cache of completions */
1350 static int index
; /* Next cached completion */
1351 char *output
= NULL
;
1352 char *tmp_command
, *p
;
1353 /* Pointer within tmp_command which corresponds to text. */
1355 struct cmd_list_element
*c
, *result_list
;
1356 extern char *rl_line_buffer
;
1357 extern int rl_point
;
1361 /* The caller is beginning to accumulate a new set of completions, so
1362 we need to find all of them now, and cache them for returning one at
1363 a time on future calls. */
1367 /* Free the storage used by LIST, but not by the strings inside.
1368 This is because rl_complete_internal () frees the strings. */
1374 /* Choose the default set of word break characters to break completions.
1375 If we later find out that we are doing completions on command strings
1376 (as opposed to strings supplied by the individual command completer
1377 functions, which can be any string) then we will switch to the
1378 special word break set for command strings, which leaves out the
1379 '-' character used in some commands. */
1381 rl_completer_word_break_characters
=
1382 gdb_completer_word_break_characters
;
1384 /* Decide whether to complete on a list of gdb commands or on symbols. */
1385 tmp_command
= (char *) alloca (rl_point
+ 1);
1388 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
1389 tmp_command
[rl_point
] = '\0';
1390 /* Since text always contains some number of characters leading up
1391 to rl_point, we can find the equivalent position in tmp_command
1392 by subtracting that many characters from the end of tmp_command. */
1393 word
= tmp_command
+ rl_point
- strlen (text
);
1397 /* An empty line we want to consider ambiguous; that is, it
1398 could be any command. */
1399 c
= (struct cmd_list_element
*) -1;
1404 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1407 /* Move p up to the next interesting thing. */
1408 while (*p
== ' ' || *p
== '\t')
1415 /* It is an unrecognized command. So there are no
1416 possible completions. */
1419 else if (c
== (struct cmd_list_element
*) -1)
1423 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1424 doesn't advance over that thing itself. Do so now. */
1426 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1428 if (q
!= tmp_command
+ rl_point
)
1430 /* There is something beyond the ambiguous
1431 command, so there are no possible completions. For
1432 example, "info t " or "info t foo" does not complete
1433 to anything, because "info t" can be "info target" or
1439 /* We're trying to complete on the command which was ambiguous.
1440 This we can deal with. */
1443 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1448 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1450 /* Insure that readline does the right thing with respect to
1451 inserting quotes. */
1452 rl_completer_word_break_characters
=
1453 gdb_completer_command_word_break_characters
;
1458 /* We've recognized a full command. */
1460 if (p
== tmp_command
+ rl_point
)
1462 /* There is no non-whitespace in the line beyond the command. */
1464 if (p
[-1] == ' ' || p
[-1] == '\t')
1466 /* The command is followed by whitespace; we need to complete
1467 on whatever comes after command. */
1470 /* It is a prefix command; what comes after it is
1471 a subcommand (e.g. "info "). */
1472 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1474 /* Insure that readline does the right thing
1475 with respect to inserting quotes. */
1476 rl_completer_word_break_characters
=
1477 gdb_completer_command_word_break_characters
;
1481 /* It is a normal command; what comes after it is
1482 completed by the command's completer function. */
1483 list
= (*c
->completer
) (p
, word
);
1488 /* The command is not followed by whitespace; we need to
1489 complete on the command itself. e.g. "p" which is a
1490 command itself but also can complete to "print", "ptype"
1494 /* Find the command we are completing on. */
1496 while (q
> tmp_command
)
1498 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1504 list
= complete_on_cmdlist (result_list
, q
, word
);
1506 /* Insure that readline does the right thing
1507 with respect to inserting quotes. */
1508 rl_completer_word_break_characters
=
1509 gdb_completer_command_word_break_characters
;
1514 /* There is non-whitespace beyond the command. */
1516 if (c
->prefixlist
&& !c
->allow_unknown
)
1518 /* It is an unrecognized subcommand of a prefix command,
1519 e.g. "info adsfkdj". */
1524 /* It is a normal command. */
1525 list
= (*c
->completer
) (p
, word
);
1531 /* If we found a list of potential completions during initialization then
1532 dole them out one at a time. The vector of completions is NULL
1533 terminated, so after returning the last one, return NULL (and continue
1534 to do so) each time we are called after that, until a new list is
1539 output
= list
[index
];
1547 /* Can't do this because readline hasn't yet checked the word breaks
1548 for figuring out whether to insert a quote. */
1550 /* Make sure the word break characters are set back to normal for the
1551 next time that readline tries to complete something. */
1552 rl_completer_word_break_characters
=
1553 gdb_completer_word_break_characters
;
1559 /* Skip over a possibly quoted word (as defined by the quote characters
1560 and word break characters the completer uses). Returns pointer to the
1561 location after the "word". */
1567 char quote_char
= '\0';
1570 for (scan
= str
; *scan
!= '\0'; scan
++)
1572 if (quote_char
!= '\0')
1574 /* Ignore everything until the matching close quote char */
1575 if (*scan
== quote_char
)
1577 /* Found matching close quote. */
1582 else if (strchr (gdb_completer_quote_characters
, *scan
))
1584 /* Found start of a quoted string. */
1587 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1601 #if STOP_SIGNAL == SIGTSTP
1602 signal (SIGTSTP
, SIG_DFL
);
1604 kill (getpid (), SIGTSTP
);
1605 signal (SIGTSTP
, stop_sig
);
1607 signal (STOP_SIGNAL
, stop_sig
);
1609 printf_unfiltered ("%s", prompt
);
1610 gdb_flush (gdb_stdout
);
1612 /* Forget about any previous command -- null line now will do nothing. */
1615 #endif /* STOP_SIGNAL */
1617 /* Initialize signal handlers. */
1627 signal (SIGINT
, request_quit
);
1629 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1630 passed to the inferior, which we don't want. It would be
1631 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1632 on BSD4.3 systems using vfork, that can affect the
1633 GDB process as well as the inferior (the signal handling tables
1634 might be in memory, shared between the two). Since we establish
1635 a handler for SIGQUIT, when we call exec it will set the signal
1636 to SIG_DFL for us. */
1637 signal (SIGQUIT
, do_nothing
);
1638 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1639 signal (SIGHUP
, disconnect
);
1640 signal (SIGFPE
, float_handler
);
1642 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1643 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1647 /* Read one line from the command input stream `instream'
1648 into the local static buffer `linebuffer' (whose current length
1650 The buffer is made bigger as necessary.
1651 Returns the address of the start of the line.
1653 NULL is returned for end of file.
1655 *If* the instream == stdin & stdin is a terminal, the line read
1656 is copied into the file line saver (global var char *line,
1657 length linesize) so that it can be duplicated.
1659 This routine either uses fancy command line editing or
1660 simple input as the user has requested. */
1663 command_line_input (prrompt
, repeat
)
1667 static char *linebuffer
= 0;
1668 static unsigned linelength
= 0;
1672 char *local_prompt
= prrompt
;
1677 if (linebuffer
== 0)
1680 linebuffer
= (char *) xmalloc (linelength
);
1685 /* Control-C quits instantly if typed while in this loop
1686 since it should not wait until the user types a newline. */
1690 signal (STOP_SIGNAL
, stop_sig
);
1695 /* Reports are that some Sys V's don't flush gdb_stdout/err on reads
1696 from stdin, when stdin/out are sockets rather than ttys. So we
1697 have to do it ourselves, to make emacs-gdb and xxgdb work.
1698 On other machines, doing this once per input should be a cheap nop. */
1699 gdb_flush (gdb_stdout
);
1700 gdb_flush (gdb_stderr
);
1702 if (source_file_name
!= NULL
)
1704 ++source_line_number
;
1705 sprintf (source_error
,
1706 "%s%s:%d: Error in sourced command file:\n",
1709 source_line_number
);
1710 error_pre_print
= source_error
;
1713 /* Don't use fancy stuff if not talking to stdin. */
1714 if (command_editing_p
&& instream
== stdin
1715 && ISATTY (instream
))
1716 rl
= readline (local_prompt
);
1718 rl
= gdb_readline (local_prompt
);
1720 if (!rl
|| rl
== (char *) EOF
)
1725 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1727 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1728 nline
= (char *) xrealloc (linebuffer
, linelength
);
1729 p
+= nline
- linebuffer
;
1733 /* Copy line. Don't copy null at end. (Leaves line alone
1734 if this was just a newline) */
1738 free (rl
); /* Allocated in readline. */
1740 if (p
== linebuffer
|| *(p
- 1) != '\\')
1743 p
--; /* Put on top of '\'. */
1744 local_prompt
= (char *) 0;
1749 signal (STOP_SIGNAL
, SIG_DFL
);
1756 /* Do history expansion if that is wished. */
1757 if (history_expansion_p
&& instream
== stdin
1758 && ISATTY (instream
))
1760 char *history_value
;
1763 *p
= '\0'; /* Insert null now. */
1764 expanded
= history_expand (linebuffer
, &history_value
);
1767 /* Print the changes. */
1768 printf_unfiltered ("%s\n", history_value
);
1770 /* If there was an error, call this function again. */
1773 free (history_value
);
1774 return command_line_input (prrompt
, repeat
);
1776 if (strlen (history_value
) > linelength
)
1778 linelength
= strlen (history_value
) + 1;
1779 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1781 strcpy (linebuffer
, history_value
);
1782 p
= linebuffer
+ strlen(linebuffer
);
1783 free (history_value
);
1787 /* If we just got an empty line, and that is supposed
1788 to repeat the previous command, return the value in the
1792 if (p
== linebuffer
)
1795 while (*p1
== ' ' || *p1
== '\t')
1803 /* Add line to history if appropriate. */
1804 if (instream
== stdin
1805 && ISATTY (stdin
) && *linebuffer
)
1806 add_history (linebuffer
);
1808 /* Note: lines consisting soley of comments are added to the command
1809 history. This is useful when you type a command, and then
1810 realize you don't want to execute it quite yet. You can comment
1811 out the command and then later fetch it from the value history
1812 and remove the '#'. The kill ring is probably better, but some
1813 people are in the habit of commenting things out. */
1815 while ((c
= *p1
++) != '\0')
1818 while ((c
= *p1
++) != '"')
1820 /* Make sure an escaped '"' doesn't make us think the string
1828 while ((c
= *p1
++) != '\'')
1830 /* Make sure an escaped '\'' doesn't make us think the string
1839 /* Found a comment. */
1845 /* Save into global buffer if appropriate. */
1848 if (linelength
> linesize
)
1850 line
= xrealloc (line
, linelength
);
1851 linesize
= linelength
;
1853 strcpy (line
, linebuffer
);
1860 /* Read lines from the input stream
1861 and accumulate them in a chain of struct command_line's
1862 which is then returned. */
1864 struct command_line
*
1865 read_command_lines ()
1867 struct command_line
*first
= 0;
1868 register struct command_line
*next
, *tail
= 0;
1869 register char *p
, *p1
;
1870 struct cleanup
*old_chain
= 0;
1875 p
= command_line_input ((char *) NULL
, instream
== stdin
);
1877 /* Treat end of file like "end". */
1880 /* Remove leading and trailing blanks. */
1881 while (*p
== ' ' || *p
== '\t') p
++;
1882 p1
= p
+ strlen (p
);
1883 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1885 /* Is this "end"? */
1886 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1889 /* No => add this line to the chain of command lines. */
1890 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1891 next
->line
= savestring (p
, p1
- p
);
1899 /* We just read the first line.
1900 From now on, arrange to throw away the lines we have
1901 if we quit or get an error while inside this function. */
1903 old_chain
= make_cleanup (free_command_lines
, &first
);
1910 /* Now we are about to return the chain to our caller,
1911 so freeing it becomes his responsibility. */
1913 discard_cleanups (old_chain
);
1917 /* Free a chain of struct command_line's. */
1920 free_command_lines (lptr
)
1921 struct command_line
**lptr
;
1923 register struct command_line
*l
= *lptr
;
1924 register struct command_line
*next
;
1935 /* Add an element to the list of info subcommands. */
1938 add_info (name
, fun
, doc
)
1940 void (*fun
) PARAMS ((char *, int));
1943 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1946 /* Add an alias to the list of info subcommands. */
1949 add_info_alias (name
, oldname
, abbrev_flag
)
1954 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1957 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1958 Therefore, its own definition is called only for "info" with no args. */
1962 info_command (arg
, from_tty
)
1966 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
1967 help_list (infolist
, "info ", -1, gdb_stdout
);
1970 /* The "show" command with no arguments shows all the settings. */
1974 show_command (arg
, from_tty
)
1978 cmd_show_list (showlist
, from_tty
, "");
1981 /* Add an element to the list of commands. */
1984 add_com (name
, class, fun
, doc
)
1986 enum command_class
class;
1987 void (*fun
) PARAMS ((char *, int));
1990 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1993 /* Add an alias or abbreviation command to the list of commands. */
1996 add_com_alias (name
, oldname
, class, abbrev_flag
)
1999 enum command_class
class;
2002 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2009 error ("Argument required (%s).", why
);
2014 help_command (command
, from_tty
)
2016 int from_tty
; /* Ignored */
2018 help_cmd (command
, gdb_stdout
);
2022 validate_comname (comname
)
2028 error_no_arg ("name of command to define");
2033 if (!isalnum(*p
) && *p
!= '-')
2034 error ("Junk in argument list: \"%s\"", p
);
2039 /* This is just a placeholder in the command data structures. */
2041 user_defined_command (ignore
, from_tty
)
2048 define_command (comname
, from_tty
)
2052 register struct command_line
*cmds
;
2053 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2054 char *tem
= comname
;
2055 #define HOOK_STRING "hook-"
2058 validate_comname (comname
);
2060 /* Look it up, and verify that we got an exact match. */
2061 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2062 if (c
&& !STREQ (comname
, c
->name
))
2067 if (c
->class == class_user
|| c
->class == class_alias
)
2068 tem
= "Redefine command \"%s\"? ";
2070 tem
= "Really redefine built-in command \"%s\"? ";
2071 if (!query (tem
, c
->name
))
2072 error ("Command \"%s\" not redefined.", c
->name
);
2075 /* If this new command is a hook, then mark the command which it
2076 is hooking. Note that we allow hooking `help' commands, so that
2077 we can hook the `stop' pseudo-command. */
2079 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2081 /* Look up cmd it hooks, and verify that we got an exact match. */
2082 tem
= comname
+HOOK_LEN
;
2083 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2084 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2088 warning ("Your new `%s' command does not hook any existing command.",
2090 if (!query ("Proceed? ", (char *)0))
2091 error ("Not confirmed.");
2095 comname
= savestring (comname
, strlen (comname
));
2097 /* If the rest of the commands will be case insensitive, this one
2098 should behave in the same manner. */
2099 for (tem
= comname
; *tem
; tem
++)
2100 if (isupper(*tem
)) *tem
= tolower(*tem
);
2104 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2105 End with a line saying just \"end\".\n", comname
);
2106 gdb_flush (gdb_stdout
);
2109 cmds
= read_command_lines ();
2111 if (c
&& c
->class == class_user
)
2112 free_command_lines (&c
->user_commands
);
2114 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2115 (c
&& c
->class == class_user
)
2116 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2117 newc
->user_commands
= cmds
;
2119 /* If this new command is a hook, then mark both commands as being
2123 hookc
->hook
= newc
; /* Target gets hooked. */
2124 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2129 document_command (comname
, from_tty
)
2133 struct command_line
*doclines
;
2134 register struct cmd_list_element
*c
;
2135 char *tem
= comname
;
2137 validate_comname (comname
);
2139 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2141 if (c
->class != class_user
)
2142 error ("Command \"%s\" is built-in.", comname
);
2145 printf_unfiltered ("Type documentation for \"%s\".\n\
2146 End with a line saying just \"end\".\n", comname
);
2148 doclines
= read_command_lines ();
2150 if (c
->doc
) free (c
->doc
);
2153 register struct command_line
*cl1
;
2154 register int len
= 0;
2156 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2157 len
+= strlen (cl1
->line
) + 1;
2159 c
->doc
= (char *) xmalloc (len
+ 1);
2162 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2164 strcat (c
->doc
, cl1
->line
);
2166 strcat (c
->doc
, "\n");
2170 free_command_lines (&doclines
);
2174 print_gnu_advertisement()
2176 printf_unfiltered ("\
2177 GDB is free software and you are welcome to distribute copies of it\n\
2178 under certain conditions; type \"show copying\" to see the conditions.\n\
2179 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2184 print_gdb_version (stream
)
2187 fprintf_filtered (stream
, "\
2188 GDB %s (%s", version
, host_name
);
2190 if (!STREQ (host_name
, target_name
))
2191 fprintf_filtered (stream
, " --target %s", target_name
);
2193 fprintf_filtered (stream
, "), ");
2195 fprintf_filtered (stream
, "Copyright 1994 Free Software Foundation, Inc.");
2200 show_version (args
, from_tty
)
2205 print_gnu_advertisement ();
2206 print_gdb_version (gdb_stdout
);
2207 printf_filtered ("\n");
2211 /* xgdb calls this to reprint the usual GDB prompt. */
2216 printf_unfiltered ("%s", prompt
);
2217 gdb_flush (gdb_stdout
);
2221 quit_command (args
, from_tty
)
2225 if (inferior_pid
!= 0 && target_has_execution
)
2229 if (query ("The program is running. Quit anyway (and detach it)? "))
2230 target_detach (args
, from_tty
);
2232 error ("Not confirmed.");
2236 if (query ("The program is running. Quit anyway (and kill it)? "))
2239 error ("Not confirmed.");
2242 /* Save the history information if it is appropriate to do so. */
2243 if (write_history_p
&& history_filename
)
2244 write_history (history_filename
);
2248 /* Returns whether GDB is running on a terminal and whether the user
2249 desires that questions be asked of them on that terminal. */
2252 input_from_terminal_p ()
2254 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2259 pwd_command (args
, from_tty
)
2263 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2264 getcwd (dirbuf
, sizeof (dirbuf
));
2266 if (!STREQ (dirbuf
, current_directory
))
2267 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2268 current_directory
, dirbuf
);
2270 printf_unfiltered ("Working directory %s.\n", current_directory
);
2274 cd_command (dir
, from_tty
)
2279 /* Found something other than leading repetitions of "/..". */
2280 int found_real_path
;
2283 /* If the new directory is absolute, repeat is a no-op; if relative,
2284 repeat might be useful but is more likely to be a mistake. */
2288 error_no_arg ("new working directory");
2290 dir
= tilde_expand (dir
);
2291 make_cleanup (free
, dir
);
2293 if (chdir (dir
) < 0)
2294 perror_with_name (dir
);
2297 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2299 current_directory
= dir
;
2302 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2303 current_directory
= concat (current_directory
, dir
, NULL
);
2305 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2309 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2311 found_real_path
= 0;
2312 for (p
= current_directory
; *p
;)
2314 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2316 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2317 && (p
[3] == 0 || p
[3] == '/'))
2319 if (found_real_path
)
2321 /* Search backwards for the directory just before the "/.."
2322 and obliterate it and the "/..". */
2324 while (q
!= current_directory
&& q
[-1] != '/')
2327 if (q
== current_directory
)
2328 /* current_directory is
2329 a relative pathname ("can't happen"--leave it alone). */
2333 strcpy (q
- 1, p
+ 3);
2338 /* We are dealing with leading repetitions of "/..", for example
2339 "/../..", which is the Mach super-root. */
2344 found_real_path
= 1;
2349 forget_cached_source_info ();
2352 pwd_command ((char *) 0, 1);
2355 struct source_cleanup_lines_args
{
2358 char *old_pre_error
;
2359 char *old_error_pre_print
;
2363 source_cleanup_lines (args
)
2366 struct source_cleanup_lines_args
*p
=
2367 (struct source_cleanup_lines_args
*)args
;
2368 source_line_number
= p
->old_line
;
2369 source_file_name
= p
->old_file
;
2370 source_pre_error
= p
->old_pre_error
;
2371 error_pre_print
= p
->old_error_pre_print
;
2376 source_command (args
, from_tty
)
2381 struct cleanup
*old_cleanups
;
2383 struct source_cleanup_lines_args old_lines
;
2388 error ("source command requires pathname of file to source.");
2391 file
= tilde_expand (file
);
2392 old_cleanups
= make_cleanup (free
, file
);
2394 stream
= fopen (file
, FOPEN_RT
);
2396 perror_with_name (file
);
2398 make_cleanup (fclose
, stream
);
2400 old_lines
.old_line
= source_line_number
;
2401 old_lines
.old_file
= source_file_name
;
2402 old_lines
.old_pre_error
= source_pre_error
;
2403 old_lines
.old_error_pre_print
= error_pre_print
;
2404 make_cleanup (source_cleanup_lines
, &old_lines
);
2405 source_line_number
= 0;
2406 source_file_name
= file
;
2407 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2408 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2409 make_cleanup (free
, source_pre_error
);
2410 /* This will get set every time we read a line. So it won't stay "" for
2412 error_pre_print
= "";
2414 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2415 if (source_error_allocated
< needed_length
)
2417 source_error_allocated
*= 2;
2418 if (source_error_allocated
< needed_length
)
2419 source_error_allocated
= needed_length
;
2420 if (source_error
== NULL
)
2421 source_error
= xmalloc (source_error_allocated
);
2423 source_error
= xrealloc (source_error
, source_error_allocated
);
2426 read_command_file (stream
);
2428 do_cleanups (old_cleanups
);
2433 echo_command (text
, from_tty
)
2441 while ((c
= *p
++) != '\0')
2445 /* \ at end of argument is used after spaces
2446 so they won't be lost. */
2450 c
= parse_escape (&p
);
2452 printf_filtered ("%c", c
);
2455 printf_filtered ("%c", c
);
2458 /* Force this output to appear now. */
2460 gdb_flush (gdb_stdout
);
2464 /* Functions to manipulate command line editing control variables. */
2466 /* Number of commands to print in each call to show_commands. */
2467 #define Hist_print 10
2469 show_commands (args
, from_tty
)
2473 /* Index for history commands. Relative to history_base. */
2476 /* Number of the history entry which we are planning to display next.
2477 Relative to history_base. */
2480 /* The first command in the history which doesn't exist (i.e. one more
2481 than the number of the last command). Relative to history_base. */
2484 extern HIST_ENTRY
*history_get
PARAMS ((int));
2485 extern int history_base
;
2487 /* Print out some of the commands from the command history. */
2488 /* First determine the length of the history list. */
2489 hist_len
= history_size
;
2490 for (offset
= 0; offset
< history_size
; offset
++)
2492 if (!history_get (history_base
+ offset
))
2501 if (args
[0] == '+' && args
[1] == '\0')
2502 /* "info editing +" should print from the stored position. */
2505 /* "info editing <exp>" should print around command number <exp>. */
2506 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2508 /* "show commands" means print the last Hist_print commands. */
2511 num
= hist_len
- Hist_print
;
2517 /* If there are at least Hist_print commands, we want to display the last
2518 Hist_print rather than, say, the last 6. */
2519 if (hist_len
- num
< Hist_print
)
2521 num
= hist_len
- Hist_print
;
2526 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2528 printf_filtered ("%5d %s\n", history_base
+ offset
,
2529 (history_get (history_base
+ offset
))->line
);
2532 /* The next command we want to display is the next one that we haven't
2536 /* If the user repeats this command with return, it should do what
2537 "show commands +" does. This is unnecessary if arg is null,
2538 because "show commands +" is not useful after "show commands". */
2539 if (from_tty
&& args
)
2546 /* Called by do_setshow_command. */
2549 set_history_size_command (args
, from_tty
, c
)
2552 struct cmd_list_element
*c
;
2554 if (history_size
== INT_MAX
)
2555 unstifle_history ();
2556 else if (history_size
>= 0)
2557 stifle_history (history_size
);
2560 history_size
= INT_MAX
;
2561 error ("History size must be non-negative");
2567 set_history (args
, from_tty
)
2571 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2572 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2577 show_history (args
, from_tty
)
2581 cmd_show_list (showhistlist
, from_tty
, "");
2584 int info_verbose
= 0; /* Default verbose msgs off */
2586 /* Called by do_setshow_command. An elaborate joke. */
2589 set_verbose (args
, from_tty
, c
)
2592 struct cmd_list_element
*c
;
2594 char *cmdname
= "verbose";
2595 struct cmd_list_element
*showcmd
;
2597 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2601 c
->doc
= "Set verbose printing of informational messages.";
2602 showcmd
->doc
= "Show verbose printing of informational messages.";
2606 c
->doc
= "Set verbosity.";
2607 showcmd
->doc
= "Show verbosity.";
2612 float_handler (signo
)
2615 /* This message is based on ANSI C, section 4.7. Note that integer
2616 divide by zero causes this, so "float" is a misnomer. */
2617 signal (SIGFPE
, float_handler
);
2618 error ("Erroneous arithmetic operation.");
2621 /* Return whether we are running a batch file or from terminal. */
2625 return !(instream
== stdin
&& ISATTY (stdin
));
2637 enablebreaklist
= NULL
;
2642 showhistlist
= NULL
;
2643 unsethistlist
= NULL
;
2644 #if MAINTENANCE_CMDS
2645 maintenancelist
= NULL
;
2646 maintenanceinfolist
= NULL
;
2647 maintenanceprintlist
= NULL
;
2649 setprintlist
= NULL
;
2650 showprintlist
= NULL
;
2651 setchecklist
= NULL
;
2652 showchecklist
= NULL
;
2655 /* Init the history buffer. Note that we are called after the init file(s)
2656 * have been read so that the user can change the history file via his
2657 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2658 * overrides all of this.
2666 tmpenv
= getenv ("HISTSIZE");
2668 history_size
= atoi (tmpenv
);
2669 else if (!history_size
)
2672 stifle_history (history_size
);
2674 tmpenv
= getenv ("GDBHISTFILE");
2676 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2677 else if (!history_filename
) {
2678 /* We include the current directory so that if the user changes
2679 directories the file written will be the same as the one
2681 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2683 read_history (history_filename
);
2689 struct cmd_list_element
*c
;
2691 #ifdef DEFAULT_PROMPT
2692 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2694 prompt
= savestring ("(gdb) ", 6);
2697 /* Set the important stuff up for command editing. */
2698 command_editing_p
= 1;
2699 history_expansion_p
= 0;
2700 write_history_p
= 0;
2702 /* Setup important stuff for command line editing. */
2703 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2704 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2705 rl_completer_quote_characters
= gdb_completer_quote_characters
;
2706 rl_readline_name
= "gdb";
2708 /* Define the classes of commands.
2709 They will appear in the help list in the reverse of this order. */
2711 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
2712 "Maintenance commands.\n\
2713 Some gdb commands are provided just for use by gdb maintainers.\n\
2714 These commands are subject to frequent change, and may not be as\n\
2715 well documented as user commands.",
2717 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2718 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2719 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2720 The commands in this class are those defined by the user.\n\
2721 Use the \"define\" command to define a command.", &cmdlist
);
2722 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2723 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2724 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2725 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2726 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2727 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2728 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2729 counting from zero for the innermost (currently executing) frame.\n\n\
2730 At any time gdb identifies one frame as the \"selected\" frame.\n\
2731 Variable lookups are done with respect to the selected frame.\n\
2732 When the program being debugged stops, gdb selects the innermost frame.\n\
2733 The commands below can be used to select other frames by number or address.",
2735 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2737 add_com ("pwd", class_files
, pwd_command
,
2738 "Print working directory. This is used for your program as well.");
2739 c
= add_cmd ("cd", class_files
, cd_command
,
2740 "Set working directory to DIR for debugger and program being debugged.\n\
2741 The change does not take effect for the program being debugged\n\
2742 until the next time it is started.", &cmdlist
);
2743 c
->completer
= filename_completer
;
2746 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2751 add_com ("echo", class_support
, echo_command
,
2752 "Print a constant string. Give string as argument.\n\
2753 C escape sequences may be used in the argument.\n\
2754 No newline is added at the end of the argument;\n\
2755 use \"\\n\" if you want a newline to be printed.\n\
2756 Since leading and trailing whitespace are ignored in command arguments,\n\
2757 if you want to print some you must use \"\\\" before leading whitespace\n\
2758 to be printed or after trailing whitespace.");
2759 add_com ("document", class_support
, document_command
,
2760 "Document a user-defined command.\n\
2761 Give command name as argument. Give documentation on following lines.\n\
2762 End with a line of just \"end\".");
2763 add_com ("define", class_support
, define_command
,
2764 "Define a new command name. Command name is argument.\n\
2765 Definition appears on following lines, one command per line.\n\
2766 End with a line of just \"end\".\n\
2767 Use the \"document\" command to give documentation for the new command.\n\
2768 Commands defined in this way do not take arguments.");
2771 c
= add_cmd ("source", class_support
, source_command
,
2772 "Read commands from a file named FILE.\n\
2773 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2774 when gdb is started.", &cmdlist
);
2776 /* Punt file name, we can't help it easily. */
2777 c
= add_cmd ("source", class_support
, source_command
,
2778 "Read commands from a file named FILE.\n\
2779 Note that the file \".gdbinit\" is read automatically in this way\n\
2780 when gdb is started.", &cmdlist
);
2782 c
->completer
= filename_completer
;
2784 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2785 add_com ("help", class_support
, help_command
, "Print list of commands.");
2786 add_com_alias ("q", "quit", class_support
, 1);
2787 add_com_alias ("h", "help", class_support
, 1);
2790 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2793 add_show_from_set (c
, &showlist
);
2794 c
->function
.sfunc
= set_verbose
;
2795 set_verbose (NULL
, 0, c
);
2798 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2799 "Set editing of command lines as they are typed.\n\
2800 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2801 Without an argument, command line editing is enabled. To edit, use\n\
2802 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2805 add_prefix_cmd ("history", class_support
, set_history
,
2806 "Generic command for setting command history parameters.",
2807 &sethistlist
, "set history ", 0, &setlist
);
2808 add_prefix_cmd ("history", class_support
, show_history
,
2809 "Generic command for showing command history parameters.",
2810 &showhistlist
, "show history ", 0, &showlist
);
2813 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2814 "Set history expansion on command input.\n\
2815 Without an argument, history expansion is enabled.", &sethistlist
),
2819 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2820 "Set saving of the history record on exit.\n\
2821 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2822 Without an argument, saving is enabled.", &sethistlist
),
2825 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
2826 "Set the size of the command history, \n\
2827 ie. the number of previous commands to keep a record of.", &sethistlist
);
2828 add_show_from_set (c
, &showhistlist
);
2829 c
->function
.sfunc
= set_history_size_command
;
2832 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2833 "Set the filename in which to record the command history\n\
2834 (the list of previous commands of which a record is kept).", &sethistlist
),
2838 (add_set_cmd ("confirm", class_support
, var_boolean
,
2840 "Set whether to confirm potentially dangerous operations.",
2844 add_prefix_cmd ("info", class_info
, info_command
,
2845 "Generic command for showing things about the program being debugged.",
2846 &infolist
, "info ", 0, &cmdlist
);
2847 add_com_alias ("i", "info", class_info
, 1);
2849 add_prefix_cmd ("show", class_info
, show_command
,
2850 "Generic command for showing things about the debugger.",
2851 &showlist
, "show ", 0, &cmdlist
);
2852 /* Another way to get at the same thing. */
2853 add_info ("set", show_command
, "Show all GDB settings.");
2855 add_cmd ("commands", no_class
, show_commands
,
2856 "Show the the history of commands you typed.\n\
2857 You can supply a command number to start with, or a `+' to start after\n\
2858 the previous command number shown.",
2861 add_cmd ("version", no_class
, show_version
,
2862 "Show what version of GDB this is.", &showlist
);
2864 /* If target is open when baud changes, it doesn't take effect until the
2865 next open (I think, not sure). */
2866 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
2867 var_zinteger
, (char *)&baud_rate
,
2868 "Set baud rate for remote serial I/O.\n\
2869 This value is used to set the speed of the serial port when debugging\n\
2870 using remote targets.", &setlist
),
2874 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
2875 "Set debugging of remote protocol.\n\
2876 When enabled, each packet sent or received with the remote target\n\
2877 is displayed.", &setlist
),