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
)
694 /* Don't use *_filtered or warning() (which relies on
695 current_target) until after initialize_all_files(). */
699 "warning: could not set baud rate to `%s'.\n", optarg
);
705 #ifdef ADDITIONAL_OPTION_CASES
706 ADDITIONAL_OPTION_CASES
709 fprintf_unfiltered (gdb_stderr
,
710 "Use `%s --help' for a complete list of options.\n",
716 /* OK, that's all the options. The other arguments are filenames. */
718 for (; optind
< argc
; optind
++)
722 symarg
= argv
[optind
];
723 execarg
= argv
[optind
];
726 corearg
= argv
[optind
];
729 fprintf_unfiltered (gdb_stderr
,
730 "Excess command line arguments ignored. (%s%s)\n",
731 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
738 /* Run the init function of each source file */
740 init_cmd_lists (); /* This needs to be done first */
741 initialize_all_files ();
742 init_main (); /* But that omits this file! Do it now */
745 /* Do these (and anything which might call wrap_here or *_filtered)
746 after initialize_all_files. */
749 print_gdb_version (gdb_stdout
);
751 printf_filtered ("\n");
757 /* --version is intentionally not documented here, because we
758 are printing the version here, and the help is long enough
761 print_gdb_version (gdb_stdout
);
762 /* Make sure the output gets printed. */
764 printf_filtered ("\n");
766 /* But don't use *_filtered here. We don't want to prompt for continue
767 no matter how small the screen or how much we're going to print. */
769 This is the GNU debugger. Usage:\n\
770 gdb [options] [executable-file [core-file or process-id]]\n\
772 --help Print this message.\n\
773 --quiet Do not print version number on startup.\n\
774 --fullname Output information used by emacs-GDB interface.\n\
775 --epoch Output information used by epoch emacs-GDB interface.\n\
776 --batch Exit after processing options.\n\
777 --nx Do not read .gdbinit file.\n\
778 --tty=TTY Use TTY for input/output by the program being debugged.\n\
779 --cd=DIR Change current directory to DIR.\n\
780 --directory=DIR Search for source files in DIR.\n\
781 --command=FILE Execute GDB commands from FILE.\n\
782 --symbols=SYMFILE Read symbols from SYMFILE.\n\
783 --exec=EXECFILE Use EXECFILE as the executable.\n\
784 --se=FILE Use FILE as symbol file and executable file.\n\
785 --core=COREFILE Analyze the core dump COREFILE.\n\
786 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
787 --mapped Use mapped symbol files if supported on this system.\n\
788 --readnow Fully read symbol files on first access.\n\
790 #ifdef ADDITIONAL_OPTION_HELP
791 fputs_unfiltered (ADDITIONAL_OPTION_HELP
, gdb_stdout
);
793 fputs_unfiltered ("\n\
794 For more information, type \"help\" from within GDB, or consult the\n\
795 GDB manual (available as on-line info or a printed manual).\n", gdb_stdout
);
801 /* Print all the junk at the top, with trailing "..." if we are about
802 to read a symbol file (possibly slowly). */
803 print_gnu_advertisement ();
804 print_gdb_version (gdb_stdout
);
806 printf_filtered ("..");
808 gdb_flush (gdb_stdout
); /* Force to screen during slow operations */
811 error_pre_print
= "\n\n";
812 /* We may get more than one warning, don't double space all of them... */
813 warning_pre_print
= "\nwarning: ";
815 /* We need a default language for parsing expressions, so simple things like
816 "set width 0" won't fail if no language is explicitly set in a config file
817 or implicitly set by reading an executable during startup. */
818 set_language (language_c
);
819 expected_language
= current_language
; /* don't warn about the change. */
821 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
822 *before* all the command line arguments are processed; it sets
823 global parameters, which are independent of what file you are
824 debugging or what directory you are in. */
825 homedir
= getenv ("HOME");
828 homeinit
= (char *) alloca (strlen (getenv ("HOME")) +
829 strlen (gdbinit
) + 10);
830 strcpy (homeinit
, getenv ("HOME"));
831 strcat (homeinit
, "/");
832 strcat (homeinit
, gdbinit
);
833 if (!inhibit_gdbinit
&& access (homeinit
, R_OK
) == 0)
835 if (!SET_TOP_LEVEL ())
836 source_command (homeinit
, 0);
838 do_cleanups (ALL_CLEANUPS
);
840 /* Do stats; no need to do them elsewhere since we'll only
841 need them if homedir is set. Make sure that they are
842 zero in case one of them fails (this guarantees that they
843 won't match if either exists). */
845 memset (&homebuf
, 0, sizeof (struct stat
));
846 memset (&cwdbuf
, 0, sizeof (struct stat
));
848 stat (homeinit
, &homebuf
);
849 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
853 /* Now perform all the actions indicated by the arguments. */
856 if (!SET_TOP_LEVEL ())
858 cd_command (cdarg
, 0);
862 do_cleanups (ALL_CLEANUPS
);
864 for (i
= 0; i
< ndir
; i
++)
865 if (!SET_TOP_LEVEL ())
866 directory_command (dirarg
[i
], 0);
868 do_cleanups (ALL_CLEANUPS
);
872 && STREQ (execarg
, symarg
))
874 /* The exec file and the symbol-file are the same. If we can't open
875 it, better only print one error message. */
876 if (!SET_TOP_LEVEL ())
878 exec_file_command (execarg
, !batch
);
879 symbol_file_command (symarg
, 0);
885 if (!SET_TOP_LEVEL ())
886 exec_file_command (execarg
, !batch
);
888 if (!SET_TOP_LEVEL ())
889 symbol_file_command (symarg
, 0);
891 do_cleanups (ALL_CLEANUPS
);
893 /* After the symbol file has been read, print a newline to get us
894 beyond the copyright line... But errors should still set off
895 the error message with a (single) blank line. */
897 printf_filtered ("\n");
898 error_pre_print
= "\n";
899 warning_pre_print
= "\nwarning: ";
902 if (!SET_TOP_LEVEL ())
903 core_file_command (corearg
, !batch
);
904 else if (isdigit (corearg
[0]) && !SET_TOP_LEVEL ())
905 attach_command (corearg
, !batch
);
906 do_cleanups (ALL_CLEANUPS
);
909 if (!SET_TOP_LEVEL ())
910 tty_command (ttyarg
, !batch
);
911 do_cleanups (ALL_CLEANUPS
);
913 #ifdef ADDITIONAL_OPTION_HANDLER
914 ADDITIONAL_OPTION_HANDLER
;
917 /* Error messages should no longer be distinguished with extra output. */
919 warning_pre_print
= "warning: ";
921 /* Read the .gdbinit file in the current directory, *if* it isn't
922 the same as the $HOME/.gdbinit file (it should exist, also). */
925 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
, sizeof (struct stat
)))
926 if (!inhibit_gdbinit
&& access (gdbinit
, R_OK
) == 0)
928 if (!SET_TOP_LEVEL ())
929 source_command (gdbinit
, 0);
931 do_cleanups (ALL_CLEANUPS
);
933 for (i
= 0; i
< ncmd
; i
++)
935 if (!SET_TOP_LEVEL ())
937 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
938 read_command_file (stdin
);
940 source_command (cmdarg
[i
], !batch
);
941 do_cleanups (ALL_CLEANUPS
);
946 /* Read in the old history after all the command files have been read. */
951 /* We have hit the end of the batch file. */
955 /* Do any host- or target-specific hacks. This is used for i960 targets
956 to force the user to set a nindy target and spec its parameters. */
958 #ifdef BEFORE_MAIN_LOOP_HOOK
959 BEFORE_MAIN_LOOP_HOOK
;
962 /* The command loop. */
966 if (!SET_TOP_LEVEL ())
968 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
970 quit_command ((char *)0, instream
== stdin
);
973 /* No exit -- exit is through quit_command. */
977 execute_user_command (c
, args
)
978 struct cmd_list_element
*c
;
981 register struct command_line
*cmdlines
;
982 struct cleanup
*old_chain
;
985 error ("User-defined commands cannot take arguments.");
987 cmdlines
= c
->user_commands
;
992 /* Set the instream to 0, indicating execution of a
993 user-defined function. */
994 old_chain
= make_cleanup (source_cleanup
, instream
);
995 instream
= (FILE *) 0;
998 execute_command (cmdlines
->line
, 0);
999 cmdlines
= cmdlines
->next
;
1001 do_cleanups (old_chain
);
1004 /* Execute the line P as a command.
1005 Pass FROM_TTY as second argument to the defining function. */
1008 execute_command (p
, from_tty
)
1012 register struct cmd_list_element
*c
;
1013 register enum language flang
;
1014 static int warned
= 0;
1018 /* This can happen when command_line_input hits end of file. */
1022 while (*p
== ' ' || *p
== '\t') p
++;
1027 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1028 /* Pass null arg rather than an empty one. */
1031 /* If this command has been hooked, run the hook first. */
1033 execute_user_command (c
->hook
, (char *)0);
1035 if (c
->class == class_user
)
1036 execute_user_command (c
, arg
);
1037 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1038 do_setshow_command (arg
, from_tty
& caution
, c
);
1039 else if (c
->function
.cfunc
== NO_FUNCTION
)
1040 error ("That is not a command, just a help topic.");
1042 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1045 /* Tell the user if the language has changed (except first time). */
1046 if (current_language
!= expected_language
)
1048 if (language_mode
== language_mode_auto
) {
1049 language_info (1); /* Print what changed. */
1054 /* Warn the user if the working language does not match the
1055 language of the current frame. Only warn the user if we are
1056 actually running the program, i.e. there is a stack. */
1057 /* FIXME: This should be cacheing the frame and only running when
1058 the frame changes. */
1059 if (target_has_stack
)
1061 flang
= get_frame_language ();
1063 && flang
!= language_unknown
1064 && flang
!= current_language
->la_language
)
1066 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1074 command_loop_marker (foo
)
1079 /* Read commands from `instream' and execute them
1080 until end of file or error reading instream. */
1084 struct cleanup
*old_chain
;
1086 int stdin_is_tty
= ISATTY (stdin
);
1088 while (!feof (instream
))
1090 if (window_hook
&& instream
== stdin
)
1091 (*window_hook
) (instream
, prompt
);
1094 if (instream
== stdin
&& stdin_is_tty
)
1095 reinitialize_more_filter ();
1096 old_chain
= make_cleanup (command_loop_marker
, 0);
1097 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1101 execute_command (command
, instream
== stdin
);
1102 /* Do any commands attached to breakpoint we stopped at. */
1103 bpstat_do_actions (&stop_bpstat
);
1104 do_cleanups (old_chain
);
1108 /* Commands call this if they do not want to be repeated by null lines. */
1113 /* If we aren't reading from standard input, we are saving the last
1114 thing read from stdin in line and don't want to delete it. Null lines
1115 won't repeat here in any case. */
1116 if (instream
== stdin
)
1120 /* Read a line from the stream "instream" without command line editing.
1122 It prints PRROMPT once at the start.
1123 Action is compatible with "readline", e.g. space for the result is
1124 malloc'd and should be freed by the caller.
1126 A NULL return means end of file. */
1128 gdb_readline (prrompt
)
1133 int input_index
= 0;
1134 int result_size
= 80;
1138 /* Don't use a _filtered function here. It causes the assumed
1139 character position to be off, since the newline we read from
1140 the user is not accounted for. */
1141 fputs_unfiltered (prrompt
, gdb_stdout
);
1142 gdb_flush (gdb_stdout
);
1145 result
= (char *) xmalloc (result_size
);
1149 /* Read from stdin if we are executing a user defined command.
1150 This is the right thing for prompt_for_continue, at least. */
1151 c
= fgetc (instream
? instream
: stdin
);
1155 if (input_index
> 0)
1156 /* The last line does not end with a newline. Return it, and
1157 if we are called again fgetc will still return EOF and
1158 we'll return NULL then. */
1167 result
[input_index
++] = c
;
1168 while (input_index
>= result_size
)
1171 result
= (char *) xrealloc (result
, result_size
);
1175 result
[input_index
++] = '\0';
1179 /* Variables which control command line editing and history
1180 substitution. These variables are given default values at the end
1182 static int command_editing_p
;
1183 static int history_expansion_p
;
1184 static int write_history_p
;
1185 static int history_size
;
1186 static char *history_filename
;
1188 /* readline uses the word breaks for two things:
1189 (1) In figuring out where to point the TEXT parameter to the
1190 rl_completion_entry_function. Since we don't use TEXT for much,
1191 it doesn't matter a lot what the word breaks are for this purpose, but
1192 it does affect how much stuff M-? lists.
1193 (2) If one of the matches contains a word break character, readline
1194 will quote it. That's why we switch between
1195 gdb_completer_word_break_characters and
1196 gdb_completer_command_word_break_characters. I'm not sure when
1197 we need this behavior (perhaps for funky characters in C++ symbols?). */
1199 /* Variables which are necessary for fancy command line editing. */
1200 char *gdb_completer_word_break_characters
=
1201 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1203 /* When completing on command names, we remove '-' from the list of
1204 word break characters, since we use it in command names. If the
1205 readline library sees one in any of the current completion strings,
1206 it thinks that the string needs to be quoted and automatically supplies
1208 char *gdb_completer_command_word_break_characters
=
1209 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1211 /* Characters that can be used to quote completion strings. Note that we
1212 can't include '"' because the gdb C parser treats such quoted sequences
1214 char *gdb_completer_quote_characters
=
1217 /* Functions that are used as part of the fancy command line editing. */
1219 /* This can be used for functions which don't want to complete on symbols
1220 but don't want to complete on anything else either. */
1223 noop_completer (text
, prefix
)
1230 /* Complete on filenames. */
1232 filename_completer (text
, word
)
1236 /* From readline. */
1237 extern char *filename_completion_function ();
1238 int subsequent_name
;
1240 int return_val_used
;
1241 int return_val_alloced
;
1243 return_val_used
= 0;
1244 /* Small for testing. */
1245 return_val_alloced
= 1;
1246 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1248 subsequent_name
= 0;
1252 p
= filename_completion_function (text
, subsequent_name
);
1253 if (return_val_used
>= return_val_alloced
)
1255 return_val_alloced
*= 2;
1257 (char **) xrealloc (return_val
,
1258 return_val_alloced
* sizeof (char *));
1262 return_val
[return_val_used
++] = p
;
1265 /* Like emacs, don't complete on old versions. Especially useful
1266 in the "source" command. */
1267 if (p
[strlen (p
) - 1] == '~')
1273 /* Return exactly p. */
1274 return_val
[return_val_used
++] = p
;
1275 else if (word
> text
)
1277 /* Return some portion of p. */
1278 q
= xmalloc (strlen (p
) + 5);
1279 strcpy (q
, p
+ (word
- text
));
1280 return_val
[return_val_used
++] = q
;
1285 /* Return some of TEXT plus p. */
1286 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1287 strncpy (q
, word
, text
- word
);
1288 q
[text
- word
] = '\0';
1290 return_val
[return_val_used
++] = q
;
1294 subsequent_name
= 1;
1297 /* There is no way to do this just long enough to affect quote inserting
1298 without also affecting the next completion. This should be fixed in
1300 /* Insure that readline does the right thing
1301 with respect to inserting quotes. */
1302 rl_completer_word_break_characters
= "";
1307 /* Here are some useful test cases for completion. FIXME: These should
1308 be put in the test suite. They should be tested with both M-? and TAB.
1310 "show output-" "radix"
1311 "show output" "-radix"
1312 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1313 "p " ambiguous (all symbols)
1314 "info t foo" no completions
1315 "info t " no completions
1316 "info t" ambiguous ("info target", "info terminal", etc.)
1317 "info ajksdlfk" no completions
1318 "info ajksdlfk " no completions
1320 "info " ambiguous (all info commands)
1321 "p \"a" no completions (string constant)
1322 "p 'a" ambiguous (all symbols starting with a)
1323 "p b-a" ambiguous (all symbols starting with a)
1324 "p b-" ambiguous (all symbols)
1325 "file Make" "file" (word break hard to screw up here)
1326 "file ../gdb.stabs/wi" "erd" (needs to not break word at slash)
1329 /* Generate completions one by one for the completer. Each time we are
1330 called return another potential completion to the caller. The function
1331 is misnamed; it just completes on commands or passes the buck to the
1332 command's completer function; the stuff specific to symbol completion
1333 is in make_symbol_completion_list.
1335 TEXT is readline's idea of the "word" we are looking at; we don't really
1336 like readline's ideas about word breaking so we ignore it.
1338 MATCHES is the number of matches that have currently been collected from
1339 calling this completion function. When zero, then we need to initialize,
1340 otherwise the initialization has already taken place and we can just
1341 return the next potential completion string.
1343 Returns NULL if there are no more completions, else a pointer to a string
1344 which is a possible completion.
1346 RL_LINE_BUFFER is available to be looked at; it contains the entire text
1347 of the line. RL_POINT is the offset in that line of the cursor. You
1348 should pretend that the line ends at RL_POINT. */
1351 symbol_completion_function (text
, matches
)
1355 static char **list
= (char **)NULL
; /* Cache of completions */
1356 static int index
; /* Next cached completion */
1357 char *output
= NULL
;
1358 char *tmp_command
, *p
;
1359 /* Pointer within tmp_command which corresponds to text. */
1361 struct cmd_list_element
*c
, *result_list
;
1362 extern char *rl_line_buffer
;
1363 extern int rl_point
;
1367 /* The caller is beginning to accumulate a new set of completions, so
1368 we need to find all of them now, and cache them for returning one at
1369 a time on future calls. */
1373 /* Free the storage used by LIST, but not by the strings inside.
1374 This is because rl_complete_internal () frees the strings. */
1380 /* Choose the default set of word break characters to break completions.
1381 If we later find out that we are doing completions on command strings
1382 (as opposed to strings supplied by the individual command completer
1383 functions, which can be any string) then we will switch to the
1384 special word break set for command strings, which leaves out the
1385 '-' character used in some commands. */
1387 rl_completer_word_break_characters
=
1388 gdb_completer_word_break_characters
;
1390 /* Decide whether to complete on a list of gdb commands or on symbols. */
1391 tmp_command
= (char *) alloca (rl_point
+ 1);
1394 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
1395 tmp_command
[rl_point
] = '\0';
1396 /* Since text always contains some number of characters leading up
1397 to rl_point, we can find the equivalent position in tmp_command
1398 by subtracting that many characters from the end of tmp_command. */
1399 word
= tmp_command
+ rl_point
- strlen (text
);
1403 /* An empty line we want to consider ambiguous; that is, it
1404 could be any command. */
1405 c
= (struct cmd_list_element
*) -1;
1410 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1413 /* Move p up to the next interesting thing. */
1414 while (*p
== ' ' || *p
== '\t')
1421 /* It is an unrecognized command. So there are no
1422 possible completions. */
1425 else if (c
== (struct cmd_list_element
*) -1)
1429 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1430 doesn't advance over that thing itself. Do so now. */
1432 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1434 if (q
!= tmp_command
+ rl_point
)
1436 /* There is something beyond the ambiguous
1437 command, so there are no possible completions. For
1438 example, "info t " or "info t foo" does not complete
1439 to anything, because "info t" can be "info target" or
1445 /* We're trying to complete on the command which was ambiguous.
1446 This we can deal with. */
1449 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1454 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1456 /* Insure that readline does the right thing with respect to
1457 inserting quotes. */
1458 rl_completer_word_break_characters
=
1459 gdb_completer_command_word_break_characters
;
1464 /* We've recognized a full command. */
1466 if (p
== tmp_command
+ rl_point
)
1468 /* There is no non-whitespace in the line beyond the command. */
1470 if (p
[-1] == ' ' || p
[-1] == '\t')
1472 /* The command is followed by whitespace; we need to complete
1473 on whatever comes after command. */
1476 /* It is a prefix command; what comes after it is
1477 a subcommand (e.g. "info "). */
1478 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1480 /* Insure that readline does the right thing
1481 with respect to inserting quotes. */
1482 rl_completer_word_break_characters
=
1483 gdb_completer_command_word_break_characters
;
1487 /* It is a normal command; what comes after it is
1488 completed by the command's completer function. */
1489 list
= (*c
->completer
) (p
, word
);
1494 /* The command is not followed by whitespace; we need to
1495 complete on the command itself. e.g. "p" which is a
1496 command itself but also can complete to "print", "ptype"
1500 /* Find the command we are completing on. */
1502 while (q
> tmp_command
)
1504 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1510 list
= complete_on_cmdlist (result_list
, q
, word
);
1512 /* Insure that readline does the right thing
1513 with respect to inserting quotes. */
1514 rl_completer_word_break_characters
=
1515 gdb_completer_command_word_break_characters
;
1520 /* There is non-whitespace beyond the command. */
1522 if (c
->prefixlist
&& !c
->allow_unknown
)
1524 /* It is an unrecognized subcommand of a prefix command,
1525 e.g. "info adsfkdj". */
1530 /* It is a normal command. */
1531 list
= (*c
->completer
) (p
, word
);
1537 /* If we found a list of potential completions during initialization then
1538 dole them out one at a time. The vector of completions is NULL
1539 terminated, so after returning the last one, return NULL (and continue
1540 to do so) each time we are called after that, until a new list is
1545 output
= list
[index
];
1553 /* Can't do this because readline hasn't yet checked the word breaks
1554 for figuring out whether to insert a quote. */
1556 /* Make sure the word break characters are set back to normal for the
1557 next time that readline tries to complete something. */
1558 rl_completer_word_break_characters
=
1559 gdb_completer_word_break_characters
;
1565 /* Skip over a possibly quoted word (as defined by the quote characters
1566 and word break characters the completer uses). Returns pointer to the
1567 location after the "word". */
1573 char quote_char
= '\0';
1576 for (scan
= str
; *scan
!= '\0'; scan
++)
1578 if (quote_char
!= '\0')
1580 /* Ignore everything until the matching close quote char */
1581 if (*scan
== quote_char
)
1583 /* Found matching close quote. */
1588 else if (strchr (gdb_completer_quote_characters
, *scan
))
1590 /* Found start of a quoted string. */
1593 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1607 #if STOP_SIGNAL == SIGTSTP
1608 signal (SIGTSTP
, SIG_DFL
);
1610 kill (getpid (), SIGTSTP
);
1611 signal (SIGTSTP
, stop_sig
);
1613 signal (STOP_SIGNAL
, stop_sig
);
1615 printf_unfiltered ("%s", prompt
);
1616 gdb_flush (gdb_stdout
);
1618 /* Forget about any previous command -- null line now will do nothing. */
1621 #endif /* STOP_SIGNAL */
1623 /* Initialize signal handlers. */
1633 signal (SIGINT
, request_quit
);
1635 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1636 passed to the inferior, which we don't want. It would be
1637 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1638 on BSD4.3 systems using vfork, that can affect the
1639 GDB process as well as the inferior (the signal handling tables
1640 might be in memory, shared between the two). Since we establish
1641 a handler for SIGQUIT, when we call exec it will set the signal
1642 to SIG_DFL for us. */
1643 signal (SIGQUIT
, do_nothing
);
1644 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1645 signal (SIGHUP
, disconnect
);
1646 signal (SIGFPE
, float_handler
);
1648 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1649 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1653 /* Read one line from the command input stream `instream'
1654 into the local static buffer `linebuffer' (whose current length
1656 The buffer is made bigger as necessary.
1657 Returns the address of the start of the line.
1659 NULL is returned for end of file.
1661 *If* the instream == stdin & stdin is a terminal, the line read
1662 is copied into the file line saver (global var char *line,
1663 length linesize) so that it can be duplicated.
1665 This routine either uses fancy command line editing or
1666 simple input as the user has requested. */
1669 command_line_input (prrompt
, repeat
)
1673 static char *linebuffer
= 0;
1674 static unsigned linelength
= 0;
1678 char *local_prompt
= prrompt
;
1683 if (linebuffer
== 0)
1686 linebuffer
= (char *) xmalloc (linelength
);
1691 /* Control-C quits instantly if typed while in this loop
1692 since it should not wait until the user types a newline. */
1696 signal (STOP_SIGNAL
, stop_sig
);
1701 /* Reports are that some Sys V's don't flush gdb_stdout/err on reads
1702 from stdin, when stdin/out are sockets rather than ttys. So we
1703 have to do it ourselves, to make emacs-gdb and xxgdb work.
1704 On other machines, doing this once per input should be a cheap nop. */
1705 gdb_flush (gdb_stdout
);
1706 gdb_flush (gdb_stderr
);
1708 if (source_file_name
!= NULL
)
1710 ++source_line_number
;
1711 sprintf (source_error
,
1712 "%s%s:%d: Error in sourced command file:\n",
1715 source_line_number
);
1716 error_pre_print
= source_error
;
1719 /* Don't use fancy stuff if not talking to stdin. */
1720 if (command_editing_p
&& instream
== stdin
1721 && ISATTY (instream
))
1722 rl
= readline (local_prompt
);
1724 rl
= gdb_readline (local_prompt
);
1726 if (!rl
|| rl
== (char *) EOF
)
1731 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1733 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1734 nline
= (char *) xrealloc (linebuffer
, linelength
);
1735 p
+= nline
- linebuffer
;
1739 /* Copy line. Don't copy null at end. (Leaves line alone
1740 if this was just a newline) */
1744 free (rl
); /* Allocated in readline. */
1746 if (p
== linebuffer
|| *(p
- 1) != '\\')
1749 p
--; /* Put on top of '\'. */
1750 local_prompt
= (char *) 0;
1755 signal (STOP_SIGNAL
, SIG_DFL
);
1762 /* Do history expansion if that is wished. */
1763 if (history_expansion_p
&& instream
== stdin
1764 && ISATTY (instream
))
1766 char *history_value
;
1769 *p
= '\0'; /* Insert null now. */
1770 expanded
= history_expand (linebuffer
, &history_value
);
1773 /* Print the changes. */
1774 printf_unfiltered ("%s\n", history_value
);
1776 /* If there was an error, call this function again. */
1779 free (history_value
);
1780 return command_line_input (prrompt
, repeat
);
1782 if (strlen (history_value
) > linelength
)
1784 linelength
= strlen (history_value
) + 1;
1785 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1787 strcpy (linebuffer
, history_value
);
1788 p
= linebuffer
+ strlen(linebuffer
);
1789 free (history_value
);
1793 /* If we just got an empty line, and that is supposed
1794 to repeat the previous command, return the value in the
1798 if (p
== linebuffer
)
1801 while (*p1
== ' ' || *p1
== '\t')
1809 /* Add line to history if appropriate. */
1810 if (instream
== stdin
1811 && ISATTY (stdin
) && *linebuffer
)
1812 add_history (linebuffer
);
1814 /* Note: lines consisting soley of comments are added to the command
1815 history. This is useful when you type a command, and then
1816 realize you don't want to execute it quite yet. You can comment
1817 out the command and then later fetch it from the value history
1818 and remove the '#'. The kill ring is probably better, but some
1819 people are in the habit of commenting things out. */
1821 while ((c
= *p1
++) != '\0')
1824 while ((c
= *p1
++) != '"')
1826 /* Make sure an escaped '"' doesn't make us think the string
1834 while ((c
= *p1
++) != '\'')
1836 /* Make sure an escaped '\'' doesn't make us think the string
1845 /* Found a comment. */
1851 /* Save into global buffer if appropriate. */
1854 if (linelength
> linesize
)
1856 line
= xrealloc (line
, linelength
);
1857 linesize
= linelength
;
1859 strcpy (line
, linebuffer
);
1866 /* Read lines from the input stream
1867 and accumulate them in a chain of struct command_line's
1868 which is then returned. */
1870 struct command_line
*
1871 read_command_lines ()
1873 struct command_line
*first
= 0;
1874 register struct command_line
*next
, *tail
= 0;
1875 register char *p
, *p1
;
1876 struct cleanup
*old_chain
= 0;
1881 p
= command_line_input ((char *) NULL
, instream
== stdin
);
1883 /* Treat end of file like "end". */
1886 /* Remove leading and trailing blanks. */
1887 while (*p
== ' ' || *p
== '\t') p
++;
1888 p1
= p
+ strlen (p
);
1889 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1891 /* Is this "end"? */
1892 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1895 /* No => add this line to the chain of command lines. */
1896 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1897 next
->line
= savestring (p
, p1
- p
);
1905 /* We just read the first line.
1906 From now on, arrange to throw away the lines we have
1907 if we quit or get an error while inside this function. */
1909 old_chain
= make_cleanup (free_command_lines
, &first
);
1916 /* Now we are about to return the chain to our caller,
1917 so freeing it becomes his responsibility. */
1919 discard_cleanups (old_chain
);
1923 /* Free a chain of struct command_line's. */
1926 free_command_lines (lptr
)
1927 struct command_line
**lptr
;
1929 register struct command_line
*l
= *lptr
;
1930 register struct command_line
*next
;
1941 /* Add an element to the list of info subcommands. */
1944 add_info (name
, fun
, doc
)
1946 void (*fun
) PARAMS ((char *, int));
1949 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1952 /* Add an alias to the list of info subcommands. */
1955 add_info_alias (name
, oldname
, abbrev_flag
)
1960 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1963 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1964 Therefore, its own definition is called only for "info" with no args. */
1968 info_command (arg
, from_tty
)
1972 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
1973 help_list (infolist
, "info ", -1, gdb_stdout
);
1976 /* The "show" command with no arguments shows all the settings. */
1980 show_command (arg
, from_tty
)
1984 cmd_show_list (showlist
, from_tty
, "");
1987 /* Add an element to the list of commands. */
1990 add_com (name
, class, fun
, doc
)
1992 enum command_class
class;
1993 void (*fun
) PARAMS ((char *, int));
1996 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1999 /* Add an alias or abbreviation command to the list of commands. */
2002 add_com_alias (name
, oldname
, class, abbrev_flag
)
2005 enum command_class
class;
2008 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2015 error ("Argument required (%s).", why
);
2020 help_command (command
, from_tty
)
2022 int from_tty
; /* Ignored */
2024 help_cmd (command
, gdb_stdout
);
2028 validate_comname (comname
)
2034 error_no_arg ("name of command to define");
2039 if (!isalnum(*p
) && *p
!= '-')
2040 error ("Junk in argument list: \"%s\"", p
);
2045 /* This is just a placeholder in the command data structures. */
2047 user_defined_command (ignore
, from_tty
)
2054 define_command (comname
, from_tty
)
2058 register struct command_line
*cmds
;
2059 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2060 char *tem
= comname
;
2061 #define HOOK_STRING "hook-"
2064 validate_comname (comname
);
2066 /* Look it up, and verify that we got an exact match. */
2067 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2068 if (c
&& !STREQ (comname
, c
->name
))
2073 if (c
->class == class_user
|| c
->class == class_alias
)
2074 tem
= "Redefine command \"%s\"? ";
2076 tem
= "Really redefine built-in command \"%s\"? ";
2077 if (!query (tem
, c
->name
))
2078 error ("Command \"%s\" not redefined.", c
->name
);
2081 /* If this new command is a hook, then mark the command which it
2082 is hooking. Note that we allow hooking `help' commands, so that
2083 we can hook the `stop' pseudo-command. */
2085 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2087 /* Look up cmd it hooks, and verify that we got an exact match. */
2088 tem
= comname
+HOOK_LEN
;
2089 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2090 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2094 warning ("Your new `%s' command does not hook any existing command.",
2096 if (!query ("Proceed? ", (char *)0))
2097 error ("Not confirmed.");
2101 comname
= savestring (comname
, strlen (comname
));
2103 /* If the rest of the commands will be case insensitive, this one
2104 should behave in the same manner. */
2105 for (tem
= comname
; *tem
; tem
++)
2106 if (isupper(*tem
)) *tem
= tolower(*tem
);
2110 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2111 End with a line saying just \"end\".\n", comname
);
2112 gdb_flush (gdb_stdout
);
2115 cmds
= read_command_lines ();
2117 if (c
&& c
->class == class_user
)
2118 free_command_lines (&c
->user_commands
);
2120 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2121 (c
&& c
->class == class_user
)
2122 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2123 newc
->user_commands
= cmds
;
2125 /* If this new command is a hook, then mark both commands as being
2129 hookc
->hook
= newc
; /* Target gets hooked. */
2130 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2135 document_command (comname
, from_tty
)
2139 struct command_line
*doclines
;
2140 register struct cmd_list_element
*c
;
2141 char *tem
= comname
;
2143 validate_comname (comname
);
2145 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2147 if (c
->class != class_user
)
2148 error ("Command \"%s\" is built-in.", comname
);
2151 printf_unfiltered ("Type documentation for \"%s\".\n\
2152 End with a line saying just \"end\".\n", comname
);
2154 doclines
= read_command_lines ();
2156 if (c
->doc
) free (c
->doc
);
2159 register struct command_line
*cl1
;
2160 register int len
= 0;
2162 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2163 len
+= strlen (cl1
->line
) + 1;
2165 c
->doc
= (char *) xmalloc (len
+ 1);
2168 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2170 strcat (c
->doc
, cl1
->line
);
2172 strcat (c
->doc
, "\n");
2176 free_command_lines (&doclines
);
2180 print_gnu_advertisement()
2182 printf_unfiltered ("\
2183 GDB is free software and you are welcome to distribute copies of it\n\
2184 under certain conditions; type \"show copying\" to see the conditions.\n\
2185 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2190 print_gdb_version (stream
)
2193 fprintf_filtered (stream
, "\
2194 GDB %s (%s", version
, host_name
);
2196 if (!STREQ (host_name
, target_name
))
2197 fprintf_filtered (stream
, " --target %s", target_name
);
2199 fprintf_filtered (stream
, "), ");
2201 fprintf_filtered (stream
, "Copyright 1994 Free Software Foundation, Inc.");
2206 show_version (args
, from_tty
)
2211 print_gnu_advertisement ();
2212 print_gdb_version (gdb_stdout
);
2213 printf_filtered ("\n");
2217 /* xgdb calls this to reprint the usual GDB prompt. */
2222 printf_unfiltered ("%s", prompt
);
2223 gdb_flush (gdb_stdout
);
2227 quit_command (args
, from_tty
)
2231 if (inferior_pid
!= 0 && target_has_execution
)
2235 if (query ("The program is running. Quit anyway (and detach it)? "))
2236 target_detach (args
, from_tty
);
2238 error ("Not confirmed.");
2242 if (query ("The program is running. Quit anyway (and kill it)? "))
2245 error ("Not confirmed.");
2248 /* UDI wants this, to kill the TIP. */
2251 /* Save the history information if it is appropriate to do so. */
2252 if (write_history_p
&& history_filename
)
2253 write_history (history_filename
);
2258 /* Returns whether GDB is running on a terminal and whether the user
2259 desires that questions be asked of them on that terminal. */
2262 input_from_terminal_p ()
2264 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2269 pwd_command (args
, from_tty
)
2273 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2274 getcwd (dirbuf
, sizeof (dirbuf
));
2276 if (!STREQ (dirbuf
, current_directory
))
2277 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2278 current_directory
, dirbuf
);
2280 printf_unfiltered ("Working directory %s.\n", current_directory
);
2284 cd_command (dir
, from_tty
)
2289 /* Found something other than leading repetitions of "/..". */
2290 int found_real_path
;
2293 /* If the new directory is absolute, repeat is a no-op; if relative,
2294 repeat might be useful but is more likely to be a mistake. */
2298 error_no_arg ("new working directory");
2300 dir
= tilde_expand (dir
);
2301 make_cleanup (free
, dir
);
2303 if (chdir (dir
) < 0)
2304 perror_with_name (dir
);
2307 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2309 current_directory
= dir
;
2312 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2313 current_directory
= concat (current_directory
, dir
, NULL
);
2315 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2319 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2321 found_real_path
= 0;
2322 for (p
= current_directory
; *p
;)
2324 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2326 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2327 && (p
[3] == 0 || p
[3] == '/'))
2329 if (found_real_path
)
2331 /* Search backwards for the directory just before the "/.."
2332 and obliterate it and the "/..". */
2334 while (q
!= current_directory
&& q
[-1] != '/')
2337 if (q
== current_directory
)
2338 /* current_directory is
2339 a relative pathname ("can't happen"--leave it alone). */
2343 strcpy (q
- 1, p
+ 3);
2348 /* We are dealing with leading repetitions of "/..", for example
2349 "/../..", which is the Mach super-root. */
2354 found_real_path
= 1;
2359 forget_cached_source_info ();
2362 pwd_command ((char *) 0, 1);
2365 struct source_cleanup_lines_args
{
2368 char *old_pre_error
;
2369 char *old_error_pre_print
;
2373 source_cleanup_lines (args
)
2376 struct source_cleanup_lines_args
*p
=
2377 (struct source_cleanup_lines_args
*)args
;
2378 source_line_number
= p
->old_line
;
2379 source_file_name
= p
->old_file
;
2380 source_pre_error
= p
->old_pre_error
;
2381 error_pre_print
= p
->old_error_pre_print
;
2386 source_command (args
, from_tty
)
2391 struct cleanup
*old_cleanups
;
2393 struct source_cleanup_lines_args old_lines
;
2398 error ("source command requires pathname of file to source.");
2401 file
= tilde_expand (file
);
2402 old_cleanups
= make_cleanup (free
, file
);
2404 stream
= fopen (file
, FOPEN_RT
);
2406 perror_with_name (file
);
2408 make_cleanup (fclose
, stream
);
2410 old_lines
.old_line
= source_line_number
;
2411 old_lines
.old_file
= source_file_name
;
2412 old_lines
.old_pre_error
= source_pre_error
;
2413 old_lines
.old_error_pre_print
= error_pre_print
;
2414 make_cleanup (source_cleanup_lines
, &old_lines
);
2415 source_line_number
= 0;
2416 source_file_name
= file
;
2417 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2418 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2419 make_cleanup (free
, source_pre_error
);
2420 /* This will get set every time we read a line. So it won't stay "" for
2422 error_pre_print
= "";
2424 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2425 if (source_error_allocated
< needed_length
)
2427 source_error_allocated
*= 2;
2428 if (source_error_allocated
< needed_length
)
2429 source_error_allocated
= needed_length
;
2430 if (source_error
== NULL
)
2431 source_error
= xmalloc (source_error_allocated
);
2433 source_error
= xrealloc (source_error
, source_error_allocated
);
2436 read_command_file (stream
);
2438 do_cleanups (old_cleanups
);
2443 echo_command (text
, from_tty
)
2451 while ((c
= *p
++) != '\0')
2455 /* \ at end of argument is used after spaces
2456 so they won't be lost. */
2460 c
= parse_escape (&p
);
2462 printf_filtered ("%c", c
);
2465 printf_filtered ("%c", c
);
2468 /* Force this output to appear now. */
2470 gdb_flush (gdb_stdout
);
2474 /* Functions to manipulate command line editing control variables. */
2476 /* Number of commands to print in each call to show_commands. */
2477 #define Hist_print 10
2479 show_commands (args
, from_tty
)
2483 /* Index for history commands. Relative to history_base. */
2486 /* Number of the history entry which we are planning to display next.
2487 Relative to history_base. */
2490 /* The first command in the history which doesn't exist (i.e. one more
2491 than the number of the last command). Relative to history_base. */
2494 extern HIST_ENTRY
*history_get
PARAMS ((int));
2495 extern int history_base
;
2497 /* Print out some of the commands from the command history. */
2498 /* First determine the length of the history list. */
2499 hist_len
= history_size
;
2500 for (offset
= 0; offset
< history_size
; offset
++)
2502 if (!history_get (history_base
+ offset
))
2511 if (args
[0] == '+' && args
[1] == '\0')
2512 /* "info editing +" should print from the stored position. */
2515 /* "info editing <exp>" should print around command number <exp>. */
2516 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2518 /* "show commands" means print the last Hist_print commands. */
2521 num
= hist_len
- Hist_print
;
2527 /* If there are at least Hist_print commands, we want to display the last
2528 Hist_print rather than, say, the last 6. */
2529 if (hist_len
- num
< Hist_print
)
2531 num
= hist_len
- Hist_print
;
2536 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2538 printf_filtered ("%5d %s\n", history_base
+ offset
,
2539 (history_get (history_base
+ offset
))->line
);
2542 /* The next command we want to display is the next one that we haven't
2546 /* If the user repeats this command with return, it should do what
2547 "show commands +" does. This is unnecessary if arg is null,
2548 because "show commands +" is not useful after "show commands". */
2549 if (from_tty
&& args
)
2556 /* Called by do_setshow_command. */
2559 set_history_size_command (args
, from_tty
, c
)
2562 struct cmd_list_element
*c
;
2564 if (history_size
== INT_MAX
)
2565 unstifle_history ();
2566 else if (history_size
>= 0)
2567 stifle_history (history_size
);
2570 history_size
= INT_MAX
;
2571 error ("History size must be non-negative");
2577 set_history (args
, from_tty
)
2581 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2582 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2587 show_history (args
, from_tty
)
2591 cmd_show_list (showhistlist
, from_tty
, "");
2594 int info_verbose
= 0; /* Default verbose msgs off */
2596 /* Called by do_setshow_command. An elaborate joke. */
2599 set_verbose (args
, from_tty
, c
)
2602 struct cmd_list_element
*c
;
2604 char *cmdname
= "verbose";
2605 struct cmd_list_element
*showcmd
;
2607 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2611 c
->doc
= "Set verbose printing of informational messages.";
2612 showcmd
->doc
= "Show verbose printing of informational messages.";
2616 c
->doc
= "Set verbosity.";
2617 showcmd
->doc
= "Show verbosity.";
2622 float_handler (signo
)
2625 /* This message is based on ANSI C, section 4.7. Note that integer
2626 divide by zero causes this, so "float" is a misnomer. */
2627 signal (SIGFPE
, float_handler
);
2628 error ("Erroneous arithmetic operation.");
2631 /* Return whether we are running a batch file or from terminal. */
2635 return !(instream
== stdin
&& ISATTY (stdin
));
2647 enablebreaklist
= NULL
;
2652 showhistlist
= NULL
;
2653 unsethistlist
= NULL
;
2654 #if MAINTENANCE_CMDS
2655 maintenancelist
= NULL
;
2656 maintenanceinfolist
= NULL
;
2657 maintenanceprintlist
= NULL
;
2659 setprintlist
= NULL
;
2660 showprintlist
= NULL
;
2661 setchecklist
= NULL
;
2662 showchecklist
= NULL
;
2665 /* Init the history buffer. Note that we are called after the init file(s)
2666 * have been read so that the user can change the history file via his
2667 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2668 * overrides all of this.
2676 tmpenv
= getenv ("HISTSIZE");
2678 history_size
= atoi (tmpenv
);
2679 else if (!history_size
)
2682 stifle_history (history_size
);
2684 tmpenv
= getenv ("GDBHISTFILE");
2686 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2687 else if (!history_filename
) {
2688 /* We include the current directory so that if the user changes
2689 directories the file written will be the same as the one
2691 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2693 read_history (history_filename
);
2699 struct cmd_list_element
*c
;
2701 #ifdef DEFAULT_PROMPT
2702 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2704 prompt
= savestring ("(gdb) ", 6);
2707 /* Set the important stuff up for command editing. */
2708 command_editing_p
= 1;
2709 history_expansion_p
= 0;
2710 write_history_p
= 0;
2712 /* Setup important stuff for command line editing. */
2713 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2714 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2715 rl_completer_quote_characters
= gdb_completer_quote_characters
;
2716 rl_readline_name
= "gdb";
2718 /* Define the classes of commands.
2719 They will appear in the help list in the reverse of this order. */
2721 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
2722 "Maintenance commands.\n\
2723 Some gdb commands are provided just for use by gdb maintainers.\n\
2724 These commands are subject to frequent change, and may not be as\n\
2725 well documented as user commands.",
2727 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2728 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2729 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2730 The commands in this class are those defined by the user.\n\
2731 Use the \"define\" command to define a command.", &cmdlist
);
2732 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2733 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2734 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2735 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2736 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2737 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2738 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2739 counting from zero for the innermost (currently executing) frame.\n\n\
2740 At any time gdb identifies one frame as the \"selected\" frame.\n\
2741 Variable lookups are done with respect to the selected frame.\n\
2742 When the program being debugged stops, gdb selects the innermost frame.\n\
2743 The commands below can be used to select other frames by number or address.",
2745 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2747 add_com ("pwd", class_files
, pwd_command
,
2748 "Print working directory. This is used for your program as well.");
2749 c
= add_cmd ("cd", class_files
, cd_command
,
2750 "Set working directory to DIR for debugger and program being debugged.\n\
2751 The change does not take effect for the program being debugged\n\
2752 until the next time it is started.", &cmdlist
);
2753 c
->completer
= filename_completer
;
2756 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2761 add_com ("echo", class_support
, echo_command
,
2762 "Print a constant string. Give string as argument.\n\
2763 C escape sequences may be used in the argument.\n\
2764 No newline is added at the end of the argument;\n\
2765 use \"\\n\" if you want a newline to be printed.\n\
2766 Since leading and trailing whitespace are ignored in command arguments,\n\
2767 if you want to print some you must use \"\\\" before leading whitespace\n\
2768 to be printed or after trailing whitespace.");
2769 add_com ("document", class_support
, document_command
,
2770 "Document a user-defined command.\n\
2771 Give command name as argument. Give documentation on following lines.\n\
2772 End with a line of just \"end\".");
2773 add_com ("define", class_support
, define_command
,
2774 "Define a new command name. Command name is argument.\n\
2775 Definition appears on following lines, one command per line.\n\
2776 End with a line of just \"end\".\n\
2777 Use the \"document\" command to give documentation for the new command.\n\
2778 Commands defined in this way do not take arguments.");
2781 c
= add_cmd ("source", class_support
, source_command
,
2782 "Read commands from a file named FILE.\n\
2783 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2784 when gdb is started.", &cmdlist
);
2786 /* Punt file name, we can't help it easily. */
2787 c
= add_cmd ("source", class_support
, source_command
,
2788 "Read commands from a file named FILE.\n\
2789 Note that the file \".gdbinit\" is read automatically in this way\n\
2790 when gdb is started.", &cmdlist
);
2792 c
->completer
= filename_completer
;
2794 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2795 add_com ("help", class_support
, help_command
, "Print list of commands.");
2796 add_com_alias ("q", "quit", class_support
, 1);
2797 add_com_alias ("h", "help", class_support
, 1);
2800 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2803 add_show_from_set (c
, &showlist
);
2804 c
->function
.sfunc
= set_verbose
;
2805 set_verbose (NULL
, 0, c
);
2808 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2809 "Set editing of command lines as they are typed.\n\
2810 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2811 Without an argument, command line editing is enabled. To edit, use\n\
2812 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2815 add_prefix_cmd ("history", class_support
, set_history
,
2816 "Generic command for setting command history parameters.",
2817 &sethistlist
, "set history ", 0, &setlist
);
2818 add_prefix_cmd ("history", class_support
, show_history
,
2819 "Generic command for showing command history parameters.",
2820 &showhistlist
, "show history ", 0, &showlist
);
2823 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2824 "Set history expansion on command input.\n\
2825 Without an argument, history expansion is enabled.", &sethistlist
),
2829 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2830 "Set saving of the history record on exit.\n\
2831 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2832 Without an argument, saving is enabled.", &sethistlist
),
2835 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
2836 "Set the size of the command history, \n\
2837 ie. the number of previous commands to keep a record of.", &sethistlist
);
2838 add_show_from_set (c
, &showhistlist
);
2839 c
->function
.sfunc
= set_history_size_command
;
2842 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2843 "Set the filename in which to record the command history\n\
2844 (the list of previous commands of which a record is kept).", &sethistlist
),
2848 (add_set_cmd ("confirm", class_support
, var_boolean
,
2850 "Set whether to confirm potentially dangerous operations.",
2854 add_prefix_cmd ("info", class_info
, info_command
,
2855 "Generic command for showing things about the program being debugged.",
2856 &infolist
, "info ", 0, &cmdlist
);
2857 add_com_alias ("i", "info", class_info
, 1);
2859 add_prefix_cmd ("show", class_info
, show_command
,
2860 "Generic command for showing things about the debugger.",
2861 &showlist
, "show ", 0, &cmdlist
);
2862 /* Another way to get at the same thing. */
2863 add_info ("set", show_command
, "Show all GDB settings.");
2865 add_cmd ("commands", no_class
, show_commands
,
2866 "Show the the history of commands you typed.\n\
2867 You can supply a command number to start with, or a `+' to start after\n\
2868 the previous command number shown.",
2871 add_cmd ("version", no_class
, show_version
,
2872 "Show what version of GDB this is.", &showlist
);
2874 /* If target is open when baud changes, it doesn't take effect until the
2875 next open (I think, not sure). */
2876 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
2877 var_zinteger
, (char *)&baud_rate
,
2878 "Set baud rate for remote serial I/O.\n\
2879 This value is used to set the speed of the serial port when debugging\n\
2880 using remote targets.", &setlist
),
2884 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
2885 "Set debugging of remote protocol.\n\
2886 When enabled, each packet sent or received with the remote target\n\
2887 is displayed.", &setlist
),