* This code is derived from software copyrighted by the Free Software
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
* Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
static char sccsid
[] = "@(#)main.c 6.6 (Berkeley) 5/13/91";
/* Top level for GDB, the GNU debugger.
Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc.
This file is part of GDB.
GDB is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
GDB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GDB; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef SET_STACK_LIMIT_HUGE
#include <sys/resource.h>
int original_stack_limit
;
/* If this definition isn't overridden by the header files, assume
that isatty and fileno exist on this system. */
#define ISATTY(FP) (isatty (fileno (FP)))
/* Version number of GDB, as a string. */
* Declare all cmd_list_element's
/* Chain containing all defined commands. */
struct cmd_list_element
*cmdlist
;
/* Chain containing all defined info subcommands. */
struct cmd_list_element
*infolist
;
/* Chain containing all defined enable subcommands. */
struct cmd_list_element
*enablelist
;
/* Chain containing all defined disable subcommands. */
struct cmd_list_element
*disablelist
;
/* Chain containing all defined delete subcommands. */
struct cmd_list_element
*deletelist
;
/* Chain containing all defined "enable breakpoint" subcommands. */
struct cmd_list_element
*enablebreaklist
;
/* Chain containing all defined set subcommands */
struct cmd_list_element
*setlist
;
/* Chain containing all defined \"set history\". */
struct cmd_list_element
*sethistlist
;
/* Chain containing all defined \"unset history\". */
struct cmd_list_element
*unsethistlist
;
/* stdio stream that command input is being read from. */
/* Current working directory. */
/* The directory name is actually stored here (usually). */
static char dirbuf
[MAXPATHLEN
];
/* Nonzero if we're debugging /dev/mem or a kernel crash dump */
/* Nonzero to inhibit confirmation of quitting or restarting
/* Nonzero if we can write in text or core file */
/* The number of lines on a page, and the number of spaces
/* Nonzero if we should refrain from using an X window. */
/* Function to call before reading a command, if nonzero.
The function receives two args: an input stream,
extern int frame_file_full_name
;
void free_command_lines ();
char *command_line_input ();
static void initialize_main ();
static void initialize_cmd_lists ();
static void source_command ();
static void print_gdb_version ();
static void float_handler ();
static void cd_command ();
/* gdb prints this when reading a command interactively */
/* Buffer used for reading command lines, and the size
allocated for it so far. */
/* This is how `error' returns to command level. */
clear_breakpoint_commands ();
clear_momentary_breakpoints ();
disable_current_display ();
longjmp (to_top_level
, 1);
/* Call FUNC with arg ARG, catching any errors.
If there is no error, return the value returned by FUNC.
If there is an error, return zero after printing ERRSTRING
(which is in addition to the specific error message already printed). */
catch_errors (func
, arg
, errstring
)
struct cleanup
*saved_cleanup_chain
;
saved_cleanup_chain
= save_cleanups ();
bcopy (to_top_level
, saved
, sizeof (jmp_buf));
if (setjmp (to_top_level
) == 0)
fprintf (stderr
, "%s\n", errstring
);
restore_cleanups (saved_cleanup_chain
);
bcopy (saved
, to_top_level
, sizeof (jmp_buf));
/* Handler for SIGHUP. */
signal (SIGHUP
, SIG_DFL
);
kill (getpid (), SIGHUP
);
/* Clean up on error during a "source" command (or execution of a
Close the file opened by the command
and restore the previous input stream. */
/* Instream may be 0; set to it when executing user-defined command. */
* Source $HOME/.gdbinit and $cwd/.gdbinit.
* If X is enabled, also $HOME/.xgdbinit and $cwd/.xgdbinit.source
char *homedir
, initfile
[256];
/* Read init file, if it exists in home directory */
homedir
= getenv ("HOME");
struct stat homebuf
, cwdbuf
;
sprintf(initfile
, "%s/.gdbinit", homedir
);
if (access (initfile
, R_OK
) == 0)
if (!setjmp (to_top_level
))
source_command (initfile
);
sprintf(initfile
, "%s/.xgdbinit", homedir
);
if (access (initfile
, R_OK
) == 0)
if (!setjmp (to_top_level
))
source_command (initfile
);
/* Determine if current directory is the same as the home
directory, so we don't source the same file twice. */
bzero (&homebuf
, sizeof (struct stat
));
bzero (&cwdbuf
, sizeof (struct stat
));
samedir
= bcmp(&homebuf
, &cwdbuf
, sizeof(struct stat
)) == 0;
/* Read the input file in the current directory, *if* it isn't
the same file (it should exist, also). */
if (access (".gdbinit", R_OK
) == 0)
if (!setjmp (to_top_level
))
source_command (".gdbinit");
if (access (".xgdbinit", R_OK
) == 0)
if (!setjmp (to_top_level
))
source_command (".xgdbinit");
/* XXX Windows only for xgdb. */
if (cp
= strrchr(argv
[0], '/'))
#if defined (ALIGN_STACK_ON_STARTUP)
line
= (char *) xmalloc (linesize
);
current_directory
= dirbuf
;
#ifdef SET_STACK_LIMIT_HUGE
/* Set the stack limit huge so that alloca (particularly stringtab
* in dbxread.c) does not fail. */
getrlimit (RLIMIT_STACK
, &rlim
);
original_stack_limit
= rlim
.rlim_cur
;
rlim
.rlim_cur
= rlim
.rlim_max
;
setrlimit (RLIMIT_STACK
, &rlim
);
#endif /* SET_STACK_LIMIT_HUGE */
/* Look for flag arguments. */
for (i
= 1; i
< argc
; i
++)
if (!strcmp (argv
[i
], "-q") || !strcmp (argv
[i
], "-quiet"))
else if (!strcmp (argv
[i
], "-nx"))
else if (!strcmp (argv
[i
], "-nw"))
else if (!strcmp (argv
[i
], "-batch"))
else if (!strcmp (argv
[i
], "-fullname"))
frame_file_full_name
= 1;
else if (!strcmp (argv
[i
], "-xgdb_verbose"))
/* -help: print a summary of command line switches. */
else if (!strcmp (argv
[i
], "-help"))
This is GDB, the GNU debugger. Use the command\n\
gdb [options] [executable [core-file]]\n\
to enter the debugger.\n\
Options available are:\n\
-help Print this message.\n\
-quiet Do not print version number on startup.\n\
-fullname Output information used by emacs-GDB interface.\n\
-batch Exit after processing options.\n\
-nx Do not read .gdbinit file.\n\
-tty TTY Use TTY for input/output by the program being debugged.\n\
-cd DIR Change current directory to DIR.\n\
-directory DIR Search for source files in DIR.\n\
-command FILE Execute GDB commands from FILE.\n\
-symbols SYMFILE Read symbols from SYMFILE.\n\
-exec EXECFILE Use EXECFILE as the executable.\n\
-se FILE Use FILE as symbol file and executable file.\n\
-core COREFILE Analyze the core dump COREFILE.\n\
-v Print GNU message and version number on startup.\n\
-nc Don't confirm quit or run commands.\n\
For more information, type \"help\" from within GDB, or consult the\n\
GDB manual (available as on-line info or a printed manual).\n", stderr
);
/* Exiting after printing this message seems like
the most useful thing to do. */
else if (!strcmp (argv
[i
], "-k"))
else if (!strcmp (argv
[i
], "-w"))
else if (!strcmp (argv
[i
], "-v"))
else if (!strcmp (argv
[i
], "-nc"))
else if (argv
[i
][0] == '-')
/* Other options take arguments, so don't confuse an
argument with an option. */
/* Run the init function of each source file */
initialize_cmd_lists (); /* This needs to be done first */
initialize_main (); /* But that omits this file! Do it now */
/* Process the command line arguments. */
for (i
= 1; i
< argc
; i
++)
extern void exec_file_command (), symbol_file_command ();
extern void core_file_command ();
register char *arg
= argv
[i
];
/* Args starting with - say what to do with the following arg
extern void tty_command (), directory_command ();
if (!strcmp (arg
, "-q") || !strcmp (arg
, "-nx")
|| !strcmp (arg
, "-quiet") || !strcmp (arg
, "-batch")
|| !strcmp (arg
, "-fullname") || !strcmp (arg
, "-nw")
|| !strcmp (arg
, "-xgdb_verbose")
|| !strcmp (arg
, "-help")
/* Already processed above */
fprintf (stderr
, "No argument follows \"%s\".\n", arg
);
if (!setjmp (to_top_level
))
/* -s foo: get syms from foo. -e foo: execute foo.
-se foo: do both with foo. -c foo: use foo as core dump. */
if (!strcmp (arg
, "-se"))
exec_file_command (argv
[i
], !batch
);
symbol_file_command (argv
[i
], !batch
);
else if (!strcmp (arg
, "-s") || !strcmp (arg
, "-symbols"))
symbol_file_command (argv
[i
], !batch
);
else if (!strcmp (arg
, "-e") || !strcmp (arg
, "-exec"))
exec_file_command (argv
[i
], !batch
);
else if (!strcmp (arg
, "-c") || !strcmp (arg
, "-core"))
core_file_command (argv
[i
], !batch
);
/* -x foo: execute commands from foo. */
else if (!strcmp (arg
, "-x") || !strcmp (arg
, "-command")
|| !strcmp (arg
, "-commands"))
source_command (argv
[i
]);
/* -d foo: add directory `foo' to source-file directory
else if (!strcmp (arg
, "-d") || !strcmp (arg
, "-dir")
|| !strcmp (arg
, "-directory"))
directory_command (argv
[i
], 0);
/* -cd FOO: specify current directory as FOO.
GDB remembers the precise string FOO as the dirname. */
else if (!strcmp (arg
, "-cd"))
/* -t /def/ttyp1: use /dev/ttyp1 for inferior I/O. */
else if (!strcmp (arg
, "-t") || !strcmp (arg
, "-tty"))
tty_command (argv
[i
], 0);
error ("Unknown command-line switch: \"%s\"\n", arg
);
/* Args not thus accounted for
are treated as, first, the symbol/executable file
and, second, the core dump file. */
if (!setjmp (to_top_level
))
exec_file_command (arg
, !batch
);
symbol_file_command (arg
, !batch
);
core_file_command (arg
, !batch
);
fprintf (stderr
, "Excess command line args ignored. (%s%s)\n",
arg
, (i
== argc
- 1) ? "" : " ...");
fatal ("Attempt to read commands from stdin in batch mode.");
/* We have hit the end of the batch file. */
printf ("Type \"help\" for a list of commands.\n");
if (!setjmp (to_top_level
))
clearerr (stdin
); /* Don't get hung if C-d is typed. */
else if (feof(instream
)) /* Avoid endless loops for redirected stdin */
/* Read commands from `instream' and execute them
struct cleanup
*old_chain
;
register int toplevel
= (instream
== stdin
);
register int interactive
= (toplevel
&& ISATTY(stdin
));
reinitialize_more_filter ();
old_chain
= make_cleanup (do_nothing
, 0);
cmd_line
= command_line_input (prompt
, toplevel
);
execute_command (cmd_line
, toplevel
);
/* Do any commands attached to breakpoint we stopped at. */
do_breakpoint_commands ();
/* Commands call this if they do not want to be repeated by null lines. */
/* If we aren't reading from standard input, we are saving the last
thing read from stdin in line and don't want to delete it. Null lines
won't repeat here in any case. */
/* Read a line from the stream "instream" without command line editing.
It prints PROMPT once at the start.
Action is compatible with "readline" (i.e., space for typing is
malloced & should be freed by caller). */
result
= (char *) xmalloc (result_size
);
c
= fgetc (instream
? instream
: stdin
);
result
[input_index
++] = c
;
if (input_index
>= result_size
)
result
= (char *)xrealloc(result
, result_size
);
result
[input_index
++] = '\0';
/* Declaration for fancy readline with command line editing. */
/* Variables which control command line editing and history
substitution. These variables are given default values at the end
static int command_editing_p
;
static int history_expansion_p
;
static int write_history_p
;
static char *history_filename
;
/* Variables which are necessary for fancy command line editing. */
char *gdb_completer_word_break_characters
=
" \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,";
/* Functions that are used as part of the fancy command line editing. */
/* Generate symbol names one by one for the completer. If STATE is
zero, then we need to initialize, otherwise the initialization has
already taken place. TEXT is what we expect the symbol to start
with. RL_LINE_BUFFER is available to be looked at; it contains the
entire text of the line. RL_POINT is the offset in that line of
the cursor. You should pretend that the line ends at RL_POINT. */
symbol_completion_function (text
, state
)
char **make_symbol_completion_list ();
static char **list
= (char **)NULL
;
extern char *rl_line_buffer
;
struct cmd_list_element
*c
, *result_list
;
/* Free the storage used by LIST, but not by the strings inside. This is
because rl_complete_internal () frees the strings. */
/* Decide whether to complete on a list of gdb commands or on
tmp_command
= (char *) alloca (rl_point
+ 1);
strncpy (tmp_command
, rl_line_buffer
, rl_point
);
tmp_command
[rl_point
] = '\0';
/* An empty line we want to consider ambiguous; that is,
it could be any command. */
c
= (struct cmd_list_element
*) -1;
c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
/* Move p up to the next interesting thing. */
while (*p
== ' ' || *p
== '\t')
/* He's typed something unrecognizable. Sigh. */
else if (c
== (struct cmd_list_element
*) -1)
if (p
+ strlen(text
) != tmp_command
+ rl_point
)
error ("Unrecognized command.");
/* He's typed something ambiguous. This is easier. */
list
= complete_on_cmdlist (*result_list
->prefixlist
, text
);
list
= complete_on_cmdlist (cmdlist
, text
);
/* If we've gotten this far, gdb has recognized a full
command. There are several possibilities:
1) We need to complete on the command.
2) We need to complete on the possibilities coming after
2) We need to complete the text of what comes after the
/* Always (might be longer versions of thie command). */
list
= complete_on_cmdlist (result_list
, text
);
list
= complete_on_cmdlist (*c
->prefixlist
, "");
list
= make_symbol_completion_list ("");
if (c
->prefixlist
&& !c
->allow_unknown
)
error ("\"%s\" command requires a subcommand.",
list
= make_symbol_completion_list (text
);
/* If the debugged program wasn't compiled with symbols, or if we're
clearly completing on a command and no command matches, return
static struct termio norm_tty
;
ioctl(tty
, TCGETA
, &cur_tty
);
ioctl(tty
, TCSETAW
, &norm_tty
);
signal(SIGTSTP
, SIG_DFL
);
* we've just been resumed -- current tty params become new
* 'normal' params (in case tset/stty was done while we were
* suspended). Merge values that readline might have changed
* into new params, then restore term mode.
ioctl(tty
, TCGETA
, &norm_tty
);
cur_tty
.c_lflag
= (cur_tty
.c_lflag
& (ICANON
|ECHO
|ISIG
)) |
(norm_tty
.c_lflag
&~ (ICANON
|ECHO
|ISIG
));
cur_tty
.c_iflag
= (cur_tty
.c_iflag
& (IXON
|ISTRIP
|INPCK
)) |
(norm_tty
.c_iflag
&~ (IXON
|ISTRIP
|INPCK
));
ioctl(tty
, TCSETAW
, &cur_tty
);
signal(SIGTSTP
, suspend_sig
);
* Forget about any previous command -- null line now will do
static struct sgttyb norm_tty
;
static struct tchars norm_tchars
;
static struct ltchars norm_ltchars
;
#define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK|PASS8)
#define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK)
struct tchars cur_tchars
;
struct ltchars cur_ltchars
;
ioctl(tty
, TIOCGETP
, &cur_tty
);
ioctl(tty
, TIOCGETC
, &cur_tchars
);
ioctl(tty
, TIOCLGET
, &cur_lflags
);
ioctl(tty
, TIOCGLTC
, &cur_ltchars
);
ioctl(tty
, TIOCSETP
, &norm_tty
);
ioctl(tty
, TIOCSETC
, &norm_tchars
);
ioctl(tty
, TIOCLSET
, &norm_lflags
);
ioctl(tty
, TIOCSLTC
, &norm_ltchars
);
signal(SIGTSTP
, SIG_DFL
);
* we've just been resumed -- current tty params become new
* 'normal' params (in case tset/stty was done while we were
* suspended). Merge values that readline might have changed
* into new params, then restore term mode.
ioctl(tty
, TIOCGETP
, &norm_tty
);
cur_flags
= cur_tty
.sg_flags
;
cur_tty
.sg_flags
= (cur_tty
.sg_flags
&~ RL_TFLAGS
)
| (cur_flags
& RL_TFLAGS
);
ioctl(tty
, TIOCLGET
, &norm_lflags
);
cur_lflags
= (cur_lflags
&~ LPASS8
) | (cur_flags
& LPASS8
);
ioctl(tty
, TIOCGETC
, &norm_tchars
);
ioctl(tty
, TIOCGLTC
, &norm_ltchars
);
ioctl(tty
, TIOCSETP
, &cur_tty
);
ioctl(tty
, TIOCSETC
, &cur_tchars
);
ioctl(tty
, TIOCLSET
, &cur_lflags
);
ioctl(tty
, TIOCSLTC
, &cur_ltchars
);
signal(SIGTSTP
, suspend_sig
);
* Forget about any previous command -- null line now will do
/* Initialize signal handlers. */
extern void request_quit ();
signal (SIGINT
, request_quit
);
/* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
passed to the inferior, which we don't want. It would be
possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
on BSD4.3 systems using vfork, that will (apparently) affect the
GDB process as well as the inferior (the signal handling tables
being shared between the two, apparently). Since we establish
a handler for SIGQUIT, when we call exec it will set the signal
signal (SIGQUIT
, do_nothing
);
if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
signal (SIGHUP
, disconnect
);
signal (SIGFPE
, float_handler
);
ioctl(tty
, TIOCGETP
, &norm_tty
);
ioctl(tty
, TIOCLGET
, &norm_lflags
);
ioctl(tty
, TIOCGETC
, &norm_tchars
);
ioctl(tty
, TIOCGLTC
, &norm_ltchars
);
signal(SIGTSTP
, suspend_sig
);
finish_command_input(inputline
, repeat
, interactive
)
register char *inputline
;
/* Do history expansion if that is wished. */
if (interactive
&& history_expansion_p
) {
expanded
= history_expand(inputline
, &do_free
);
/* An error acts like no input. */
/* get rid of any leading whitespace */
while (isspace(*inputline
))
* If we just got an empty line, and that is supposed to repeat the
* previous command, return the value in the global buffer.
* If line is a comment, clear it out.
* Note: comments are added to the command history. This is useful
* when you type a command, and then realize you don't want to
* execute it quite yet. You can comment out the command and then
* later fetch it from the value history and remove the '#'.
/* Save into global buffer. */
register int i
= strlen(inputline
) + 1;
line
= xrealloc(line
, i
);
get_a_cmd_line(prompt
, interactive
)
/* Control-C quits instantly if typed while reading input. */
if (interactive
&& command_editing_p
) {
extern void (*rl_event_hook
)();
rl_event_hook
= window_hook
;
cp
= gdb_readline(prompt
);
/* Read one line from the command input stream `instream'
Returns the address of the start of the line.
*If* the instream == stdin & stdin is a terminal, the line read
is copied into the file line saver (global var char *line,
length linesize) so that it can be duplicated.
This routine either uses fancy command line editing or
simple input as the user has requested. */
command_line_input(prompt
, repeat
)
register int interactive
= (instream
== stdin
&& ISATTY(instream
));
cp
= get_a_cmd_line(prompt
, interactive
);
* handle continued lines (this loop is not particularly
* efficient because it's rare).
while (cp
&& cp
[i
= strlen(cp
) - 1] == '\\') {
register char *np
= get_a_cmd_line(prompt
, interactive
);
cp
= xrealloc(cp
, i
+ j
+ 1);
return (finish_command_input(cp
, repeat
, interactive
));
static struct user_args
{
static struct user_args
*user_arg
= uargs
;
/* Bind arguments $arg0, $arg1, ..., for a user defined command. */
struct cleanup
*old_chain
= make_cleanup(arg_cleanup
, user_arg
);
if (++user_arg
>= &uargs
[MAX_USER_ARGS
])
error("user defined functions nested too deeply\n");
bzero(user_arg
, sizeof(*user_arg
));
while (*p
&& ! isspace(*p
))
user_arg
->a
[i
].len
= p
- user_arg
->a
[i
].arg
;
while (cp
= index(cp
, '$')) {
if (strncmp(cp
, "$arg", 4) == 0 && isdigit(cp
[4]))
/* expand arguments from "line" into "new" */
register char *line
, *new;
register char *cp
= findarg(line
);
while (cp
= findarg(line
)) {
bcopy(line
, new, cp
- line
);
if (len
= user_arg
->a
[i
].len
) {
bcopy(user_arg
->a
[i
].arg
, new, len
);
/* expand any arguments in "line" then execute the result */
expand_and_execute(line
, from_tty
)
execute_command(line
, from_tty
);
execute_command(new, from_tty
);
read_one_command_line(prompt
, from_tty
)
p
= command_line_input(prompt
, from_tty
);
/* Remove trailing blanks. */
while (--p1
> p
&& (*p1
== ' ' || *p1
== '\t'))
static char cmd_prompt
[] = " > ";
parse_control_structure(rootcmd
, from_tty
, level
)
struct command_line
*rootcmd
;
struct command_line
*cmd
= (struct command_line
*)xmalloc(sizeof(*cmd
));
prompt
= from_tty
? &cmd_prompt
[sizeof(cmd_prompt
) - 1 - 2*level
] :
bzero(cmd
, sizeof(*cmd
));
char *p
= read_one_command_line(prompt
, from_tty
);
p
= savestring(p
, strlen(p
));
if (!strncmp(p
, "while ", 6)) {
if (parse_control_structure(cmd
, from_tty
, level
))
} else if (!strncmp(p
, "if ", 3)) {
if (parse_control_structure(cmd
, from_tty
, level
)) {
struct command_line
*tmp
;
cmd
->elsebody
= cmd
->body
;
stat
= parse_control_structure(cmd
, from_tty
,
cmd
->elsebody
= cmd
->body
;
} else if (!strcmp(p
, "else")) {
} else if (!strcmp(p
, "end")) {
} else if (!strcmp(p
, "exitloop")) {
cmd
->next
= (struct command_line
*)xmalloc(sizeof(*cmd
));
bzero(cmd
, sizeof(*cmd
));
execute_control_structure(cmd
)
register struct command_line
*cmd
;
expand_and_execute(cmd
->line
, 0);
expand_args(cmd
->line
+ 6, expn
);
cond
= parse_c_expression(expn
);
while (breakpoint_cond_eval(cond
) == 0)
if (execute_control_structure(cmd
->body
))
expand_args(cmd
->line
+ 3, expn
);
cond
= parse_c_expression(expn
);
stat
= breakpoint_cond_eval(cond
);
if (execute_control_structure(cmd
->body
))
} else if (cmd
->elsebody
) {
if (execute_control_structure(cmd
->elsebody
))
execute_command_lines(cmd
)
struct command_line
*cmd
;
struct cleanup
*old_chain
= make_cleanup(source_cleanup
, instream
);
* Set the instream to 0, indicating execution of a user-defined
(void)execute_control_structure(cmd
);
/* do following command lines if expression true */
struct cleanup
*old_chain
;
struct command_line
*cmd
= (struct command_line
*)xmalloc(sizeof(*cmd
));
sprintf(buf
, "if %s", p
);
bzero(cmd
, sizeof(*cmd
));
old_chain
= make_cleanup(free_command_lines
, cmd
);
cmd
->line
= savestring(buf
, strlen(buf
));
if (parse_control_structure(cmd
, from_tty
, 0)) {
struct command_line
*tmp
;
cmd
->elsebody
= cmd
->body
;
(void) parse_control_structure(cmd
, from_tty
, 0);
cmd
->elsebody
= cmd
->body
;
(void) execute_command_lines(cmd
);
/* do following command lines while expression true */
while_command(p
, from_tty
)
struct cleanup
*old_chain
;
struct command_line
*cmd
= (struct command_line
*)xmalloc(sizeof(*cmd
));
sprintf(buf
, "while %s", p
);
bzero(cmd
, sizeof(*cmd
));
old_chain
= make_cleanup(free_command_lines
, cmd
);
cmd
->line
= savestring(buf
, strlen(buf
));
(void)parse_control_structure(cmd
, from_tty
, 0);
(void)execute_command_lines(cmd
);
* Execute the line P as a command.
* Pass FROM_TTY as second argument to the defining function.
execute_command (p
, from_tty
)
register struct cmd_list_element
*c
;
register struct command_line
*cmdlines
;
c
= lookup_cmd(&p
, cmdlist
, "", 0, 1);
error("That is not a command, just a help topic.");
else if (c
->class == (int) class_user
) {
struct cleanup
*old_chain
= setup_user_args(p
);
cmdlines
= (struct command_line
*) c
->function
;
(void)execute_command_lines(cmdlines
);
/* Pass null arg rather than an empty one. */
(*c
->function
) (*p
? p
: 0, from_tty
);
* Read lines from the input stream and accumulate them in a chain of struct
* command_line's which is then returned.
read_command_lines(from_tty
)
struct cleanup
*old_chain
;
struct command_line
*cmd
= (struct command_line
*)xmalloc(sizeof(*cmd
));
struct command_line
*next
;
bzero(cmd
, sizeof(*cmd
));
old_chain
= make_cleanup(free_command_lines
, cmd
);
(void)parse_control_structure(cmd
, from_tty
, 0);
discard_cleanups(old_chain
);
/* Free a chain of struct command_line's. */
struct command_line
*cmds
;
struct command_line
*next
;
/* Add an element to the list of info subcommands. */
add_info (name
, fun
, doc
)
add_cmd (name
, no_class
, fun
, doc
, &infolist
);
/* Add an alias to the list of info subcommands. */
add_info_alias (name
, oldname
, abbrev_flag
)
add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
/* The "info" command is defined as a prefix, with allow_unknown = 0.
Therefore, its own definition is called only for "info" with no args. */
printf ("\"info\" must be followed by the name of an info command.\n");
help_list (infolist
, "info ", -1, stdout
);
/* Add an element to the list of commands. */
add_com (name
, class, fun
, doc
)
add_cmd (name
, class, fun
, doc
, &cmdlist
);
/* Add an alias or abbreviation command to the list of commands. */
add_com_alias (name
, oldname
, class, abbrev_flag
)
add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
error ("Argument required (%s).", why
);
help_command (command
, from_tty
)
int from_tty
; /* Ignored */
help_cmd (command
, stdout
);
validate_comname (comname
)
error_no_arg ("name of command to define");
if (!(*p
>= 'A' && *p
<= 'Z')
&& !(*p
>= 'a' && *p
<= 'z')
&& !(*p
>= '0' && *p
<= '9')
error ("Junk in argument list: \"%s\"", p
);
define_command (comname
, from_tty
)
register struct command_line
*cmds
;
register struct cmd_list_element
*c
;
validate_comname (comname
);
c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
if (c
->class == (int) class_user
|| c
->class == (int) class_alias
)
tem
= "Redefine command \"%s\"? ";
tem
= "Really redefine built-in command \"%s\"? ";
if (!query (tem
, comname
))
error ("Command \"%s\" not redefined.", comname
);
printf ("Type commands for definition of \"%s\".\n\
End with a line saying just \"end\".\n", comname
);
comname
= savestring (comname
, strlen (comname
));
cmds
= read_command_lines (from_tty
);
if (c
&& c
->class == (int) class_user
)
free_command_lines (c
->function
);
add_com (comname
, class_user
, cmds
,
(c
&& c
->class == (int) class_user
)
? c
->doc
: savestring ("User-defined.", 13));
document_command (comname
, from_tty
)
register struct cmd_list_element
*c
;
validate_comname (comname
);
c
= lookup_cmd (&tmp
, cmdlist
, "", 0, 1);
if (c
->class != (int) class_user
)
error ("Command \"%s\" is built-in.", comname
);
printf ("Type documentation for \"%s\". \
End with a line saying just \"end\".\n", comname
);
while (p
= read_one_command_line(from_tty
? "> " : 0, from_tty
))
if (strcmp(p
, "end") == 0)
doc
= xrealloc(doc
, i
+ len
);
printf ("GDB %s, Copyright (C) 1989 Free Software Foundation, Inc.\n\
There is ABSOLUTELY NO WARRANTY for GDB; type \"info warranty\" for details.\n\
GDB is free software and you are welcome to distribute copies of it\n\
under certain conditions; type \"info copying\" to see the conditions.\n",
/* Command to specify a prompt string instead of "(gdb) ". */
set_prompt_command (text
)
error_no_arg ("string to which to set prompt");
new = (char *) xmalloc (strlen (text
) + 2);
/* \ at end of argument is used after spaces
so they won't be lost. */
new = (char *) xrealloc (new, q
- new);
extern void exec_file_command ();
if (inhibit_confirm
|| query ("The program is running. Quit anyway? "))
/* Prevent any warning message from reopen_exec_file, in case
we have a core file that's inconsistent with the exec file. */
exec_file_command (0, 0);
error ("Not confirmed.");
/* Save the history information if it is appropriate to do so. */
if (write_history_p
&& history_filename
)
write_history (history_filename
);
return instream
== stdin
;
pwd_command (arg
, from_tty
)
if (arg
) error ("The \"pwd\" command does not take an argument: %s", arg
);
if (strcmp (dirbuf
, current_directory
))
printf ("Working directory %s\n (canonically %s).\n",
current_directory
, dirbuf
);
printf ("Working directory %s.\n", current_directory
);
cd_command (dir
, from_tty
)
error_no_arg ("new working directory");
dir
= tilde_expand (dir
);
make_cleanup (free
, dir
);
dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
current_directory
= concat (current_directory
, "/", dir
);
/* Now simplify any occurrences of `.' and `..' in the pathname. */
for (p
= current_directory
; *p
;)
if (!strncmp (p
, "/./", 2)
&& (p
[2] == 0 || p
[2] == '/'))
else if (!strncmp (p
, "/..", 3)
&& (p
[3] == 0 || p
[3] == '/')
&& p
!= current_directory
)
while (q
!= current_directory
&& q
[-1] != '/') q
--;
if (q
!= current_directory
)
pwd_command ((char *) 0, 1);
source_command (arg
, from_tty
)
struct cleanup
*cleanups
;
/* Let source without arguments read .gdbinit. */
file
= tilde_expand (file
);
make_cleanup (free
, file
);
if (path
= getenv(kernel_debugging
? "KGDBPATH" : "GDBPATH"))
if (path
= getenv("GDBPATH"))
int fd
= openp(path
, 1, file
, O_RDONLY
, 0, 0);
stream
= fdopen(fd
, "r");
stream
= fopen (file
, "r");
cleanups
= make_cleanup (source_cleanup
, instream
);
/* \ at end of argument is used after spaces
so they won't be lost. */
if (query ("Should GDB dump core? "))
signal (SIGQUIT
, SIG_DFL
);
kill (getpid (), SIGQUIT
);
parse_binary_operation (caller
, arg
)
while (arg
[length
- 1] == ' ' || arg
[length
- 1] == '\t')
if (!strncmp (arg
, "on", length
)
|| !strncmp (arg
, "1", length
)
|| !strncmp (arg
, "yes", length
))
if (!strncmp (arg
, "off", length
)
|| !strncmp (arg
, "0", length
)
|| !strncmp (arg
, "no", length
))
error ("\"%s\" not given a binary valued argument.", caller
);
/* Functions to manipulate command line editing control variables. */
set_editing (arg
, from_tty
)
command_editing_p
= parse_binary_operation ("set command-editing", arg
);
/* Number of commands to print in each call to editing_info. */
editing_info (arg
, from_tty
)
/* Index for history commands. Relative to history_base. */
/* Number of the history entry which we are planning to display next.
Relative to history_base. */
/* The first command in the history which doesn't exist (i.e. one more
than the number of the last command). Relative to history_base. */
printf_filtered ("Interactive command editing is %s.\n",
command_editing_p
? "on" : "off");
printf_filtered ("History expansion of command input is %s.\n",
history_expansion_p
? "on" : "off");
printf_filtered ("Writing of a history record upon exit is %s.\n",
write_history_p
? "enabled" : "disabled");
printf_filtered ("The size of the history list (number of stored commands) is %d.\n",
printf_filtered ("The name of the history record is \"%s\".\n\n",
history_filename
? history_filename
: "");
/* Print out some of the commands from the command history. */
/* First determine the length of the history list. */
for (offset
= 0; offset
< history_size
; offset
++)
if (!history_get (history_base
+ offset
))
if (arg
[0] == '+' && arg
[1] == '\0')
/* "info editing +" should print from the stored position. */
/* "info editing <exp>" should print around command number <exp>. */
num
= (parse_and_eval_address (arg
) - history_base
) - Hist_print
/ 2;
/* "info editing" means print the last Hist_print commands. */
num
= hist_len
- Hist_print
;
/* If there are at least Hist_print commands, we want to display the last
Hist_print rather than, say, the last 6. */
if (hist_len
- num
< Hist_print
)
num
= hist_len
- Hist_print
;
if (num
== hist_len
- Hist_print
)
printf_filtered ("The list of the last %d commands is:\n\n", Hist_print
);
printf_filtered ("Some of the stored commands are:\n\n");
for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
printf_filtered ("%5d %s\n", history_base
+ offset
,
(history_get (history_base
+ offset
))->line
);
/* The next command we want to display is the next one that we haven't
/* If the user repeats this command with return, it should do what
"info editing +" does. This is unnecessary if arg is null,
because "info editing +" is not useful after "info editing". */
set_history_expansion (arg
, from_tty
)
history_expansion_p
= parse_binary_operation ("set history expansion", arg
);
set_history_write (arg
, from_tty
)
write_history_p
= parse_binary_operation ("set history write", arg
);
set_history (arg
, from_tty
)
printf ("\"set history\" must be followed by the name of a history subcommand.\n");
help_list (sethistlist
, "set history ", -1, stdout
);
set_history_size (arg
, from_tty
)
error_no_arg ("set history size");
history_size
= atoi (arg
);
set_history_filename (arg
, from_tty
)
error_no_arg ("history file name");
arg
= tilde_expand (arg
);
make_cleanup (free
, arg
);
while (i
> 0 && (arg
[i
] == ' ' || arg
[i
] == '\t'))
history_filename
= (char *) 0;
history_filename
= savestring (arg
, i
+ 1);
history_filename
[i
] = '\0';
set_verbose_command (arg
, from_tty
)
info_verbose
= parse_binary_operation ("set verbose", arg
);
verbose_info (arg
, from_tty
)
error ("\"info verbose\" does not take any arguments.\n");
printf ("Verbose printing of information is %s.\n",
info_verbose
? "on" : "off");
error ("Invalid floating value encountered or computed.");
cmdlist
= (struct cmd_list_element
*) 0;
infolist
= (struct cmd_list_element
*) 0;
enablelist
= (struct cmd_list_element
*) 0;
disablelist
= (struct cmd_list_element
*) 0;
deletelist
= (struct cmd_list_element
*) 0;
enablebreaklist
= (struct cmd_list_element
*) 0;
setlist
= (struct cmd_list_element
*) 0;
sethistlist
= (struct cmd_list_element
*) 0;
unsethistlist
= (struct cmd_list_element
*) 0;
/* Command line editing externals. */
extern int (*rl_completion_entry_function
)();
extern char *rl_completer_word_break_characters
;
extern char *rl_readline_name
;
/* Set default verbose mode on. */
prompt
= savestring ("(kgdb) ", 7);
prompt
= savestring ("(gdb) ", 6);
/* Set the important stuff up for command editing. */
if (tmpenv
= getenv ("HISTSIZE"))
history_size
= atoi (tmpenv
);
stifle_history (history_size
);
if (tmpenv
= getenv ("GDBHISTFILE"))
history_filename
= savestring (tmpenv
, strlen(tmpenv
));
/* We include the current directory so that if the user changes
directories the file written will be the same as the one
history_filename
= concat (current_directory
, "/.gdb_history", "");
read_history (history_filename
);
/* Setup important stuff for command line editing. */
rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
rl_readline_name
= "gdb";
/* Define the classes of commands.
They will appear in the help list in the reverse of this order. */
add_cmd ("obscure", class_obscure
, 0, "Obscure features.", &cmdlist
);
add_cmd ("alias", class_alias
, 0, "Aliases of other commands.", &cmdlist
);
add_cmd ("user", class_user
, 0, "User-defined commands.\n\
The commands in this class are those defined by the user.\n\
Use the \"define\" command to define a command.", &cmdlist
);
add_cmd ("support", class_support
, 0, "Support facilities.", &cmdlist
);
add_cmd ("status", class_info
, 0, "Status inquiries.", &cmdlist
);
add_cmd ("files", class_files
, 0, "Specifying and examining files.", &cmdlist
);
add_cmd ("breakpoints", class_breakpoint
, 0, "Making program stop at certain points.", &cmdlist
);
add_cmd ("data", class_vars
, 0, "Examining data.", &cmdlist
);
add_cmd ("stack", class_stack
, 0, "Examining the stack.\n\
The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
counting from zero for the innermost (currently executing) frame.\n\n\
At any time gdb identifies one frame as the \"selected\" frame.\n\
Variable lookups are done with respect to the selected frame.\n\
When the program being debugged stops, gdb selects the innermost frame.\n\
The commands below can be used to select other frames by number or address.",
add_cmd ("running", class_run
, 0, "Running the program.", &cmdlist
);
add_com ("pwd", class_files
, pwd_command
,
"Print working directory. This is used for your program as well.");
add_com ("cd", class_files
, cd_command
,
"Set working directory to DIR for debugger and program being debugged.\n\
The change does not take effect for the program being debugged\n\
until the next time it is started.");
add_cmd ("prompt", class_support
, set_prompt_command
,
"Change gdb's prompt from the default of \"(gdb)\"",
add_com ("echo", class_support
, echo_command
,
"Print a constant string. Give string as argument.\n\
C escape sequences may be used in the argument.\n\
No newline is added at the end of the argument;\n\
use \"\\n\" if you want a newline to be printed.\n\
Since leading and trailing whitespace are ignored in command arguments,\n\
if you want to print some you must use \"\\\" before leading whitespace\n\
to be printed or after trailing whitespace.");
add_com ("document", class_support
, document_command
,
"Document a user-defined command.\n\
Give command name as argument. Give documentation on following lines.\n\
End with a line of just \"end\".");
add_com ("define", class_support
, define_command
,
"Define a new command name. Command name is argument.\n\
Definition appears on following lines, one command per line.\n\
End with a line of just \"end\".\n\
Use the \"document\" command to give documentation for the new command.\n\
Commands defined in this way do not take arguments.");
add_com ("source", class_support
, source_command
,
"Read commands from a file named FILE.\n\
Note that the file \".gdbinit\" is read automatically in this way\n\
add_com ("quit", class_support
, quit_command
, "Exit gdb.");
add_com ("help", class_support
, help_command
, "Print list of commands.");
add_com_alias ("q", "quit", class_support
, 1);
add_com_alias ("h", "help", class_support
, 1);
add_com ("while", class_support
, while_command
,
"execute following commands while condition is true.\n\
Expression for condition follows \"while\" keyword.");
add_com ("if", class_support
, if_command
,
"execute following commands if condition is true.\n\
Expression for condition follows \"if\" keyword.");
add_cmd ("verbose", class_support
, set_verbose_command
,
"Change the number of informational messages gdb prints.",
add_info ("verbose", verbose_info
,
"Status of gdb's verbose printing option.\n");
add_com ("dump-me", class_obscure
, dump_me_command
,
"Get fatal error; make debugger dump its core.");
add_cmd ("editing", class_support
, set_editing
,
"Enable or disable command line editing.\n\
Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
Without an argument, command line editing is enabled.", &setlist
);
add_prefix_cmd ("history", class_support
, set_history
,
"Generic command for setting command history parameters.",
&sethistlist
, "set history ", 0, &setlist
);
add_cmd ("expansion", no_class
, set_history_expansion
,
"Enable or disable history expansion on command input.\n\
Without an argument, history expansion is enabled.", &sethistlist
);
add_cmd ("write", no_class
, set_history_write
,
"Enable or disable saving of the history record on exit.\n\
Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
Without an argument, saving is enabled.", &sethistlist
);
add_cmd ("size", no_class
, set_history_size
,
"Set the size of the command history, \n\
ie. the number of previous commands to keep a record of.", &sethistlist
);
add_cmd ("filename", no_class
, set_history_filename
,
"Set the filename in which to record the command history\n\
(the list of previous commands of which a record is kept).", &sethistlist
);
add_prefix_cmd ("info", class_info
, info_command
,
"Generic command for printing status.",
&infolist
, "info ", 0, &cmdlist
);
add_com_alias ("i", "info", class_info
, 1);
add_info ("editing", editing_info
, "Status of command editor.");
add_info ("version", version_info
, "Report what version of GDB this is.");