802 lines
22 KiB
C
802 lines
22 KiB
C
/* GDB CLI commands.
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Copyright 2000, 2001 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "completer.h"
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#include "target.h" /* For baud_rate, remote_debug and remote_timeout */
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#include "gdb_wait.h" /* For shell escape implementation */
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#include "gnu-regex.h" /* Used by apropos_command */
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#ifdef UI_OUT
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#include "ui-out.h"
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#endif
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#include "top.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-script.h"
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#include "cli/cli-setshow.h"
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#include "cli/cli-cmds.h"
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#ifndef GDBINIT_FILENAME
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#define GDBINIT_FILENAME ".gdbinit"
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#endif
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/* FIXME: this should be auto-configured! */
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#ifdef __MSDOS__
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# define CANT_FORK
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#endif
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/* From gdb/top.c */
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extern void dont_repeat (void);
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extern void set_verbose (char *, int, struct cmd_list_element *);
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extern void show_history (char *, int);
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extern void set_history (char *, int);
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extern void show_commands (char *, int);
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/* Prototypes for local functions */
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static void complete_command (char *, int);
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static void echo_command (char *, int);
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static void pwd_command (char *, int);
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static void show_version (char *, int);
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static void validate_comname (char *);
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static void help_command (char *, int);
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static void show_command (char *, int);
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static void info_command (char *, int);
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static void show_debug (char *, int);
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static void set_debug (char *, int);
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static void show_user (char *, int);
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static void make_command (char *, int);
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static void shell_escape (char *, int);
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void apropos_command (char *, int);
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/* Define all cmd_list_elements. */
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/* Chain containing all defined commands. */
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struct cmd_list_element *cmdlist;
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/* Chain containing all defined info subcommands. */
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struct cmd_list_element *infolist;
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/* Chain containing all defined enable subcommands. */
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struct cmd_list_element *enablelist;
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/* Chain containing all defined disable subcommands. */
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struct cmd_list_element *disablelist;
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/* Chain containing all defined toggle subcommands. */
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struct cmd_list_element *togglelist;
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/* Chain containing all defined stop subcommands. */
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struct cmd_list_element *stoplist;
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/* Chain containing all defined delete subcommands. */
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struct cmd_list_element *deletelist;
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/* Chain containing all defined "enable breakpoint" subcommands. */
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struct cmd_list_element *enablebreaklist;
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/* Chain containing all defined set subcommands */
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struct cmd_list_element *setlist;
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/* Chain containing all defined unset subcommands */
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struct cmd_list_element *unsetlist;
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/* Chain containing all defined show subcommands. */
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struct cmd_list_element *showlist;
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/* Chain containing all defined \"set history\". */
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struct cmd_list_element *sethistlist;
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/* Chain containing all defined \"show history\". */
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struct cmd_list_element *showhistlist;
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/* Chain containing all defined \"unset history\". */
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struct cmd_list_element *unsethistlist;
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/* Chain containing all defined maintenance subcommands. */
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struct cmd_list_element *maintenancelist;
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/* Chain containing all defined "maintenance info" subcommands. */
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struct cmd_list_element *maintenanceinfolist;
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/* Chain containing all defined "maintenance print" subcommands. */
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struct cmd_list_element *maintenanceprintlist;
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struct cmd_list_element *setprintlist;
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struct cmd_list_element *showprintlist;
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struct cmd_list_element *setdebuglist;
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struct cmd_list_element *showdebuglist;
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struct cmd_list_element *setchecklist;
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struct cmd_list_element *showchecklist;
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/* Utility used everywhere when at least one argument is needed and
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none is supplied. */
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void
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error_no_arg (char *why)
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{
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error ("Argument required (%s).", why);
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}
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/* The "info" command is defined as a prefix, with allow_unknown = 0.
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Therefore, its own definition is called only for "info" with no args. */
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/* ARGSUSED */
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static void
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info_command (char *arg, int from_tty)
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{
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printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
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help_list (infolist, "info ", -1, gdb_stdout);
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}
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/* The "show" command with no arguments shows all the settings. */
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/* ARGSUSED */
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static void
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show_command (char *arg, int from_tty)
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{
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cmd_show_list (showlist, from_tty, "");
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}
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/* Provide documentation on command or list given by COMMAND. FROM_TTY
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is ignored. */
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/* ARGSUSED */
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static void
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help_command (char *command, int from_tty)
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{
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help_cmd (command, gdb_stdout);
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}
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/* The "complete" command is used by Emacs to implement completion. */
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/* ARGSUSED */
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static void
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complete_command (char *arg, int from_tty)
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{
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int i;
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int argpoint;
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char *completion;
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dont_repeat ();
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if (arg == NULL)
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arg = "";
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argpoint = strlen (arg);
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for (completion = line_completion_function (arg, i = 0, arg, argpoint);
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completion;
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completion = line_completion_function (arg, ++i, arg, argpoint))
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{
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printf_unfiltered ("%s\n", completion);
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xfree (completion);
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}
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}
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int is_complete_command (void (*func) (char *args, int from_tty))
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{
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return func == complete_command;
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}
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/* ARGSUSED */
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static void
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show_version (char *args, int from_tty)
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{
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immediate_quit++;
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print_gdb_version (gdb_stdout);
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printf_filtered ("\n");
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immediate_quit--;
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}
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/* Handle the quit command. */
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void
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quit_command (char *args, int from_tty)
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{
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if (!quit_confirm ())
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error ("Not confirmed.");
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quit_force (args, from_tty);
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}
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/* ARGSUSED */
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static void
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pwd_command (char *args, int from_tty)
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{
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if (args)
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error ("The \"pwd\" command does not take an argument: %s", args);
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getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
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if (!STREQ (gdb_dirbuf, current_directory))
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printf_unfiltered ("Working directory %s\n (canonically %s).\n",
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current_directory, gdb_dirbuf);
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else
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printf_unfiltered ("Working directory %s.\n", current_directory);
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}
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void
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cd_command (char *dir, int from_tty)
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{
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int len;
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/* Found something other than leading repetitions of "/..". */
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int found_real_path;
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char *p;
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/* If the new directory is absolute, repeat is a no-op; if relative,
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repeat might be useful but is more likely to be a mistake. */
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dont_repeat ();
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if (dir == 0)
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error_no_arg ("new working directory");
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dir = tilde_expand (dir);
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make_cleanup (xfree, dir);
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if (chdir (dir) < 0)
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perror_with_name (dir);
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#if defined(_WIN32) || defined(__MSDOS__)
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/* There's too much mess with DOSish names like "d:", "d:.",
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"d:./foo" etc. Instead of having lots of special #ifdef'ed code,
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simply get the canonicalized name of the current directory. */
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dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
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#endif
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len = strlen (dir);
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if (SLASH_P (dir[len - 1]))
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{
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/* Remove the trailing slash unless this is a root directory
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(including a drive letter on non-Unix systems). */
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if (!(len == 1) /* "/" */
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#if defined(_WIN32) || defined(__MSDOS__)
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&& !(!SLASH_P (*dir) && ROOTED_P (dir) && len <= 3) /* "d:/" */
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#endif
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)
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len--;
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}
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dir = savestring (dir, len);
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if (ROOTED_P (dir))
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current_directory = dir;
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else
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{
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if (SLASH_P (current_directory[strlen (current_directory) - 1]))
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current_directory = concat (current_directory, dir, NULL);
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else
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current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
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xfree (dir);
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}
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/* Now simplify any occurrences of `.' and `..' in the pathname. */
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found_real_path = 0;
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for (p = current_directory; *p;)
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{
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if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2])))
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strcpy (p, p + 2);
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else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.'
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&& (p[3] == 0 || SLASH_P (p[3])))
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{
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if (found_real_path)
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{
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/* Search backwards for the directory just before the "/.."
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and obliterate it and the "/..". */
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char *q = p;
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while (q != current_directory && !SLASH_P (q[-1]))
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--q;
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if (q == current_directory)
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/* current_directory is
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a relative pathname ("can't happen"--leave it alone). */
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++p;
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else
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{
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strcpy (q - 1, p + 3);
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p = q - 1;
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}
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}
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else
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/* We are dealing with leading repetitions of "/..", for example
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"/../..", which is the Mach super-root. */
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p += 3;
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}
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else
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{
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found_real_path = 1;
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++p;
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}
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}
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forget_cached_source_info ();
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if (from_tty)
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pwd_command ((char *) 0, 1);
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}
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void
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source_command (char *args, int from_tty)
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{
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FILE *stream;
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struct cleanup *old_cleanups;
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char *file = args;
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if (file == NULL)
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{
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error ("source command requires pathname of file to source.");
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}
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file = tilde_expand (file);
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old_cleanups = make_cleanup (xfree, file);
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stream = fopen (file, FOPEN_RT);
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if (!stream)
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{
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if (from_tty)
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perror_with_name (file);
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else
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return;
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}
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script_from_file (stream, file);
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do_cleanups (old_cleanups);
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}
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/* ARGSUSED */
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static void
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echo_command (char *text, int from_tty)
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{
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char *p = text;
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register int c;
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if (text)
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while ((c = *p++) != '\0')
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{
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if (c == '\\')
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{
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/* \ at end of argument is used after spaces
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so they won't be lost. */
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if (*p == 0)
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return;
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c = parse_escape (&p);
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if (c >= 0)
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printf_filtered ("%c", c);
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}
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else
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printf_filtered ("%c", c);
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}
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/* Force this output to appear now. */
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wrap_here ("");
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gdb_flush (gdb_stdout);
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}
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/* ARGSUSED */
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static void
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shell_escape (char *arg, int from_tty)
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{
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#ifdef CANT_FORK
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/* If ARG is NULL, they want an inferior shell, but `system' just
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reports if the shell is available when passed a NULL arg. */
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int rc = system (arg ? arg : "");
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if (!arg)
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arg = "inferior shell";
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if (rc == -1)
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{
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fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", arg,
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safe_strerror (errno));
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gdb_flush (gdb_stderr);
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}
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else if (rc)
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{
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fprintf_unfiltered (gdb_stderr, "%s exited with status %d\n", arg, rc);
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gdb_flush (gdb_stderr);
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}
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#ifdef __DJGPP__
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/* Make sure to return to the directory GDB thinks it is, in case the
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shell command we just ran changed it. */
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chdir (current_directory);
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#endif
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#else /* Can fork. */
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int rc, status, pid;
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char *p, *user_shell;
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if ((user_shell = (char *) getenv ("SHELL")) == NULL)
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user_shell = "/bin/sh";
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/* Get the name of the shell for arg0 */
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if ((p = strrchr (user_shell, '/')) == NULL)
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p = user_shell;
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else
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p++; /* Get past '/' */
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if ((pid = fork ()) == 0)
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{
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if (!arg)
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execl (user_shell, p, 0);
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else
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execl (user_shell, p, "-c", arg, 0);
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fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell,
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safe_strerror (errno));
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gdb_flush (gdb_stderr);
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_exit (0177);
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}
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if (pid != -1)
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while ((rc = wait (&status)) != pid && rc != -1)
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;
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else
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error ("Fork failed");
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#endif /* Can fork. */
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}
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static void
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make_command (char *arg, int from_tty)
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{
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char *p;
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if (arg == 0)
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p = "make";
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else
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{
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p = xmalloc (sizeof ("make ") + strlen (arg));
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strcpy (p, "make ");
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strcpy (p + sizeof ("make ") - 1, arg);
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}
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shell_escape (p, from_tty);
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}
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/* ARGSUSED */
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static void
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show_user (char *args, int from_tty)
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{
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struct cmd_list_element *c;
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extern struct cmd_list_element *cmdlist;
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if (args)
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{
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c = lookup_cmd (&args, cmdlist, "", 0, 1);
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if (c->class != class_user)
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error ("Not a user command.");
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show_user_1 (c, gdb_stdout);
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}
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else
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{
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for (c = cmdlist; c; c = c->next)
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{
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if (c->class == class_user)
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show_user_1 (c, gdb_stdout);
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}
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}
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}
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/* Search through names of commands and documentations for a certain
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regular expression.
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*/
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void
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apropos_command (char *searchstr, int from_tty)
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{
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extern struct cmd_list_element *cmdlist; /*This is the main command list*/
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regex_t pattern;
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char *pattern_fastmap;
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char errorbuffer[512];
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pattern_fastmap=calloc(256,sizeof(char));
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if (searchstr == NULL)
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error("REGEXP string is empty");
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if (regcomp(&pattern,searchstr,REG_ICASE) == 0)
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{
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pattern.fastmap=pattern_fastmap;
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re_compile_fastmap(&pattern);
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apropos_cmd (gdb_stdout,cmdlist,&pattern,"");
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}
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else
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{
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regerror(regcomp(&pattern,searchstr,REG_ICASE),NULL,errorbuffer,512);
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error("Error in regular expression:%s",errorbuffer);
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}
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xfree (pattern_fastmap);
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}
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static void
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set_debug (char *arg, int from_tty)
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{
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printf_unfiltered ("\"set debug\" must be followed by the name of a print subcommand.\n");
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help_list (setdebuglist, "set debug ", -1, gdb_stdout);
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}
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static void
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show_debug (char *args, int from_tty)
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{
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cmd_show_list (showdebuglist, from_tty, "");
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}
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void
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init_cmd_lists (void)
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{
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cmdlist = NULL;
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infolist = NULL;
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enablelist = NULL;
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disablelist = NULL;
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togglelist = NULL;
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stoplist = NULL;
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deletelist = NULL;
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enablebreaklist = NULL;
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setlist = NULL;
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unsetlist = NULL;
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showlist = NULL;
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sethistlist = NULL;
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showhistlist = NULL;
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unsethistlist = NULL;
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||
maintenancelist = NULL;
|
||
maintenanceinfolist = NULL;
|
||
maintenanceprintlist = NULL;
|
||
setprintlist = NULL;
|
||
showprintlist = NULL;
|
||
setchecklist = NULL;
|
||
showchecklist = NULL;
|
||
}
|
||
|
||
|
||
void
|
||
init_cli_cmds (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
/* Define the classes of commands.
|
||
They will appear in the help list in the reverse of this order. */
|
||
|
||
add_cmd ("internals", class_maintenance, NO_FUNCTION,
|
||
"Maintenance commands.\n\
|
||
Some gdb commands are provided just for use by gdb maintainers.\n\
|
||
These commands are subject to frequent change, and may not be as\n\
|
||
well documented as user commands.",
|
||
&cmdlist);
|
||
add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
|
||
add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
|
||
add_cmd ("user-defined", class_user, NO_FUNCTION, "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, NO_FUNCTION, "Support facilities.", &cmdlist);
|
||
if (!dbx_commands)
|
||
add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
|
||
add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
|
||
add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
|
||
add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
|
||
add_cmd ("stack", class_stack, NO_FUNCTION, "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.",
|
||
&cmdlist);
|
||
add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
|
||
|
||
/* Define general commands. */
|
||
|
||
add_com ("pwd", class_files, pwd_command,
|
||
"Print working directory. This is used for your program as well.");
|
||
c = add_cmd ("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.", &cmdlist);
|
||
c->completer = filename_completer;
|
||
|
||
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 may have up to ten arguments.");
|
||
|
||
#ifdef __STDC__
|
||
c = add_cmd ("source", class_support, source_command,
|
||
"Read commands from a file named FILE.\n\
|
||
Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
|
||
when gdb is started.", &cmdlist);
|
||
#else
|
||
/* Punt file name, we can't help it easily. */
|
||
c = add_cmd ("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\
|
||
when gdb is started.", &cmdlist);
|
||
#endif
|
||
c->completer = filename_completer;
|
||
|
||
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);
|
||
|
||
c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose,
|
||
"Set ",
|
||
&setlist),
|
||
add_show_from_set (c, &showlist);
|
||
c->function.sfunc = set_verbose;
|
||
set_verbose (NULL, 0, c);
|
||
|
||
add_prefix_cmd ("history", class_support, set_history,
|
||
"Generic command for setting command history parameters.",
|
||
&sethistlist, "set history ", 0, &setlist);
|
||
add_prefix_cmd ("history", class_support, show_history,
|
||
"Generic command for showing command history parameters.",
|
||
&showhistlist, "show history ", 0, &showlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p,
|
||
"Set history expansion on command input.\n\
|
||
Without an argument, history expansion is enabled.", &sethistlist),
|
||
&showhistlist);
|
||
|
||
add_prefix_cmd ("info", class_info, info_command,
|
||
"Generic command for showing things about the program being debugged.",
|
||
&infolist, "info ", 0, &cmdlist);
|
||
add_com_alias ("i", "info", class_info, 1);
|
||
|
||
add_com ("complete", class_obscure, complete_command,
|
||
"List the completions for the rest of the line as a command.");
|
||
|
||
add_prefix_cmd ("show", class_info, show_command,
|
||
"Generic command for showing things about the debugger.",
|
||
&showlist, "show ", 0, &cmdlist);
|
||
/* Another way to get at the same thing. */
|
||
add_info ("set", show_command, "Show all GDB settings.");
|
||
|
||
add_cmd ("commands", no_class, show_commands,
|
||
"Show the history of commands you typed.\n\
|
||
You can supply a command number to start with, or a `+' to start after\n\
|
||
the previous command number shown.",
|
||
&showlist);
|
||
|
||
add_cmd ("version", no_class, show_version,
|
||
"Show what version of GDB this is.", &showlist);
|
||
|
||
add_com ("while", class_support, while_command,
|
||
"Execute nested commands WHILE the conditional expression is non zero.\n\
|
||
The conditional expression must follow the word `while' and must in turn be\n\
|
||
followed by a new line. The nested commands must be entered one per line,\n\
|
||
and should be terminated by the word `end'.");
|
||
|
||
add_com ("if", class_support, if_command,
|
||
"Execute nested commands once IF the conditional expression is non zero.\n\
|
||
The conditional expression must follow the word `if' and must in turn be\n\
|
||
followed by a new line. The nested commands must be entered one per line,\n\
|
||
and should be terminated by the word 'else' or `end'. If an else clause\n\
|
||
is used, the same rules apply to its nested commands as to the first ones.");
|
||
|
||
/* If target is open when baud changes, it doesn't take effect until the
|
||
next open (I think, not sure). */
|
||
add_show_from_set (add_set_cmd ("remotebaud", no_class,
|
||
var_zinteger, (char *) &baud_rate,
|
||
"Set baud rate for remote serial I/O.\n\
|
||
This value is used to set the speed of the serial port when debugging\n\
|
||
using remote targets.", &setlist),
|
||
&showlist);
|
||
|
||
c = add_set_cmd ("remotedebug", no_class, var_zinteger,
|
||
(char *) &remote_debug,
|
||
"Set debugging of remote protocol.\n\
|
||
When enabled, each packet sent or received with the remote target\n\
|
||
is displayed.", &setlist);
|
||
deprecate_cmd (c, "set debug remote");
|
||
deprecate_cmd (add_show_from_set (c, &showlist), "show debug remote");
|
||
|
||
add_show_from_set (add_set_cmd ("remote", no_class, var_zinteger,
|
||
(char *) &remote_debug,
|
||
"Set debugging of remote protocol.\n\
|
||
When enabled, each packet sent or received with the remote target\n\
|
||
is displayed.", &setdebuglist),
|
||
&showdebuglist);
|
||
|
||
add_show_from_set (
|
||
add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout,
|
||
"Set timeout limit to wait for target to respond.\n\
|
||
This value is used to set the time limit for gdb to wait for a response\n\
|
||
from the target.", &setlist),
|
||
&showlist);
|
||
|
||
add_prefix_cmd ("debug", no_class, set_debug,
|
||
"Generic command for setting gdb debugging flags",
|
||
&setdebuglist, "set debug ", 0, &setlist);
|
||
|
||
add_prefix_cmd ("debug", no_class, show_debug,
|
||
"Generic command for showing gdb debugging flags",
|
||
&showdebuglist, "show debug ", 0, &showlist);
|
||
|
||
add_com ("shell", class_support, shell_escape,
|
||
"Execute the rest of the line as a shell command. \n\
|
||
With no arguments, run an inferior shell.");
|
||
|
||
/* NOTE: cagney/2000-03-20: Being able to enter ``(gdb) !ls'' would
|
||
be a really useful feature. Unfortunately, the below wont do
|
||
this. Instead it adds support for the form ``(gdb) ! ls''
|
||
(i.e. the space is required). If the ``!'' command below is
|
||
added the complains about no ``!'' command would be replaced by
|
||
complains about how the ``!'' command is broken :-) */
|
||
if (xdb_commands)
|
||
add_com_alias ("!", "shell", class_support, 0);
|
||
|
||
add_com ("make", class_support, make_command,
|
||
"Run the ``make'' program using the rest of the line as arguments.");
|
||
add_cmd ("user", no_class, show_user,
|
||
"Show definitions of user defined commands.\n\
|
||
Argument is the name of the user defined command.\n\
|
||
With no argument, show definitions of all user defined commands.", &showlist);
|
||
add_com ("apropos", class_support, apropos_command, "Search for commands matching a REGEXP");
|
||
}
|