mirror of
https://sourceware.org/git/binutils-gdb.git
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8106620887
first. * main.c (main, print_gnu_advertisement, print_gdb_version): Reformat legalese so it always prints, but acts as an "I'm here" message while symbols are being read. If any errors occur, print a few newlines to set off the message and start it at the left margin. Remove mention of "help" command, and don't yak about symbol reading. (catch_errors): Error string is now printed first in case of error, not last. * command.c (undef_cmd_error, lookup_cmd): On undefined command, suggest the "help" command. * Makefile.in (VERSION): Set to 4.0.2.
2136 lines
54 KiB
C
2136 lines
54 KiB
C
/* Top level for GDB, the GNU debugger.
|
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Copyright (C) 1986, 1987, 1988, 1989, 1990 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
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program 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 this program; if not, write to the Free Software
|
||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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||
int fclose ();
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#include "defs.h"
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#include "gdbcmd.h"
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#include "param.h"
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#include "symtab.h"
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#include "inferior.h"
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#include "signals.h"
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||
#include "target.h"
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#include "breakpoint.h"
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#include "getopt.h"
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/* readline include files */
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#include "readline.h"
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#include "history.h"
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/* readline defines this. */
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#undef savestring
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#ifdef USG
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <sys/file.h>
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#include <setjmp.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#ifdef SET_STACK_LIMIT_HUGE
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#include <sys/time.h>
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#include <sys/resource.h>
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int original_stack_limit;
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#endif
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/* If this definition isn't overridden by the header files, assume
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||
that isatty and fileno exist on this system. */
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#ifndef ISATTY
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#define ISATTY(FP) (isatty (fileno (FP)))
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#endif
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/* Initialization file name for gdb. This is overridden in some configs. */
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#ifndef GDBINIT_FILENAME
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#define GDBINIT_FILENAME ".gdbinit"
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#endif
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char gdbinit[] = GDBINIT_FILENAME;
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#define ALL_CLEANUPS ((struct cleanup *)0)
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||
/* Version number of GDB, as a string. */
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extern char *version;
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||
/* Message to be printed before the error message, when an error occurs. */
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extern char *error_pre_print;
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/* Flag for whether we want all the "from_tty" gubbish printed. */
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int caution = 1; /* Default is yes, sigh. */
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/*
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* Define all cmd_list_element's
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*/
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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 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 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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/* stdio stream that command input is being read from. */
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FILE *instream;
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/* Current working directory. */
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char *current_directory;
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/* The directory name is actually stored here (usually). */
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static char dirbuf[MAXPATHLEN];
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/* Function to call before reading a command, if nonzero.
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The function receives two args: an input stream,
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and a prompt string. */
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void (*window_hook) ();
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extern int frame_file_full_name;
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int epoch_interface;
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int xgdb_verbose;
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/* The external commands we call... */
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extern void init_source_path ();
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extern void directory_command ();
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extern void exec_file_command ();
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extern void symbol_file_command ();
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extern void core_file_command ();
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extern void tty_command ();
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extern void help_list ();
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extern void initialize_all_files ();
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extern void init_malloc ();
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||
/* Forward declarations for this file */
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||
void free_command_lines ();
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char *gdb_readline ();
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char *command_line_input ();
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static void initialize_main ();
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static void initialize_cmd_lists ();
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static void init_signals ();
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static void quit_command ();
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void command_loop ();
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static void source_command ();
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static void print_gdb_version ();
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static void print_gnu_advertisement ();
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static void float_handler ();
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static void cd_command ();
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static void read_command_file ();
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char *getenv ();
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/* gdb prints this when reading a command interactively */
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static char *prompt;
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/* Buffer used for reading command lines, and the size
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allocated for it so far. */
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char *line;
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int linesize = 100;
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/* Baud rate specified for talking to serial target systems. Default
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is left as a zero pointer, so targets can choose their own defaults. */
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char *baud_rate;
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/* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
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#ifndef STOP_SIGNAL
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#ifdef SIGTSTP
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#define STOP_SIGNAL SIGTSTP
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#endif
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#endif
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||
/* Some System V have job control but not sigsetmask(). */
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#if !defined (HAVE_SIGSETMASK)
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#define HAVE_SIGSETMASK !defined (USG)
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#endif
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#if !HAVE_SIGSETMASK
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#define sigsetmask(n)
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#endif
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/* This is how `error' returns to command level. */
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jmp_buf to_top_level;
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void
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return_to_top_level ()
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{
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quit_flag = 0;
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immediate_quit = 0;
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bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */
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clear_momentary_breakpoints ();
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disable_current_display ();
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do_cleanups (ALL_CLEANUPS);
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longjmp (to_top_level, 1);
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}
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/* Call FUNC with arg ARGS, catching any errors.
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If there is no error, return the value returned by FUNC.
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If there is an error, print ERRSTRING, print the specific error message,
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then return zero. */
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int
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catch_errors (func, args, errstring)
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int (*func) ();
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char *args;
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char *errstring;
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{
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jmp_buf saved;
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int val;
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struct cleanup *saved_cleanup_chain;
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char *saved_error_pre_print;
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saved_cleanup_chain = save_cleanups ();
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saved_error_pre_print = error_pre_print;
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bcopy (to_top_level, saved, sizeof (jmp_buf));
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error_pre_print = errstring;
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if (setjmp (to_top_level) == 0)
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val = (*func) (args);
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else
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val = 0;
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restore_cleanups (saved_cleanup_chain);
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error_pre_print = saved_error_pre_print;
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bcopy (saved, to_top_level, sizeof (jmp_buf));
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return val;
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}
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/* Handler for SIGHUP. */
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static void
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disconnect ()
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{
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kill_inferior_fast ();
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signal (SIGHUP, SIG_DFL);
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kill (getpid (), SIGHUP);
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}
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/* Clean up on error during a "source" command (or execution of a
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user-defined command). */
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static void
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source_cleanup (stream)
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FILE *stream;
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{
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/* Restore the previous input stream. */
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instream = stream;
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}
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/* Read commands from STREAM. */
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static void
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read_command_file (stream)
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FILE *stream;
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{
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struct cleanup *cleanups;
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cleanups = make_cleanup (source_cleanup, instream);
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instream = stream;
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command_loop ();
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do_cleanups (cleanups);
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int count;
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static int inhibit_gdbinit = 0;
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static int quiet = 0;
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static int batch = 0;
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/* Pointers to various arguments from command line. */
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char *symarg = NULL;
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char *execarg = NULL;
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char *corearg = NULL;
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char *cdarg = NULL;
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char *ttyarg = NULL;
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/* Pointers to all arguments of +command option. */
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char **cmdarg;
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/* Allocated size of cmdarg. */
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int cmdsize;
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/* Number of elements of cmdarg used. */
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int ncmd;
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/* Indices of all arguments of +directory option. */
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char **dirarg;
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/* Allocated size. */
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int dirsize;
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/* Number of elements used. */
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int ndir;
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register int i;
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/* This needs to happen before the first use of malloc. */
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init_malloc ();
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#if defined (ALIGN_STACK_ON_STARTUP)
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i = (int) &count & 0x3;
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if (i != 0)
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alloca (4 - i);
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#endif
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cmdsize = 1;
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cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));
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ncmd = 0;
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dirsize = 1;
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dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
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ndir = 0;
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quit_flag = 0;
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line = (char *) xmalloc (linesize);
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line[0] = '\0'; /* Terminate saved (now empty) cmd line */
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instream = stdin;
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getwd (dirbuf);
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current_directory = dirbuf;
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#ifdef SET_STACK_LIMIT_HUGE
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{
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struct rlimit rlim;
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/* Set the stack limit huge so that alloca (particularly stringtab
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* in dbxread.c) does not fail. */
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getrlimit (RLIMIT_STACK, &rlim);
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original_stack_limit = rlim.rlim_cur;
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rlim.rlim_cur = rlim.rlim_max;
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setrlimit (RLIMIT_STACK, &rlim);
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}
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#endif /* SET_STACK_LIMIT_HUGE */
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/* Parse arguments and options. */
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{
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int c;
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static int print_help;
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/* When var field is 0, use flag field to record the equivalent
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short option (or arbitrary numbers starting at 10 for those
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with no equivalent). */
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static struct option long_options[] =
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{
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{"quiet", 0, &quiet, 1},
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{"nx", 0, &inhibit_gdbinit, 1},
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{"batch", 0, &batch, 1},
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{"epoch", 0, &epoch_interface, 1},
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{"fullname", 0, &frame_file_full_name, 1},
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{"help", 0, &print_help, 1},
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{"se", 1, 0, 10},
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{"symbols", 1, 0, 's'},
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{"s", 1, 0, 's'},
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{"exec", 1, 0, 'e'},
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{"core", 1, 0, 'c'},
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{"c", 1, 0, 'c'},
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{"command", 1, 0, 'x'},
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{"x", 1, 0, 'x'},
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{"directory", 1, 0, 'd'},
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{"cd", 1, 0, 11},
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{"tty", 1, 0, 't'},
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{"b", 1, 0, 'b'},
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/* Allow machine descriptions to add more options... */
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#ifdef ADDITIONAL_OPTIONS
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ADDITIONAL_OPTIONS
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#endif
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{0, 0, 0, 0},
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};
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while (1)
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{
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c = getopt_long_only (argc, argv, "",
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long_options, &option_index);
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if (c == EOF)
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break;
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/* Long option that takes an argument. */
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if (c == 0 && long_options[option_index].flag == 0)
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c = long_options[option_index].val;
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switch (c)
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{
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case 0:
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/* Long option that just sets a flag. */
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break;
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case 10:
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symarg = optarg;
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execarg = optarg;
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break;
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case 11:
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cdarg = optarg;
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break;
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case 's':
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symarg = optarg;
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break;
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case 'e':
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execarg = optarg;
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break;
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case 'c':
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corearg = optarg;
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break;
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case 'x':
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cmdarg[ncmd++] = optarg;
|
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if (ncmd >= cmdsize)
|
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{
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cmdsize *= 2;
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cmdarg = (char **) xrealloc ((char *)cmdarg,
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cmdsize * sizeof (*cmdarg));
|
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}
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break;
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case 'd':
|
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dirarg[ndir++] = optarg;
|
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if (ndir >= dirsize)
|
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{
|
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dirsize *= 2;
|
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dirarg = (char **) xrealloc ((char *)dirarg,
|
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dirsize * sizeof (*dirarg));
|
||
}
|
||
break;
|
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case 't':
|
||
ttyarg = optarg;
|
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break;
|
||
case 'q':
|
||
quiet = 1;
|
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break;
|
||
case 'b':
|
||
baud_rate = optarg;
|
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break;
|
||
#ifdef ADDITIONAL_OPTION_CASES
|
||
ADDITIONAL_OPTION_CASES
|
||
#endif
|
||
case '?':
|
||
fprintf (stderr,
|
||
"Use `%s +help' for a complete list of options.\n",
|
||
argv[0]);
|
||
exit (1);
|
||
}
|
||
|
||
}
|
||
if (print_help)
|
||
{
|
||
fputs ("\
|
||
This is GDB, the GNU debugger. Use the command\n\
|
||
gdb [options] [executable [core-file]]\n\
|
||
to enter the debugger.\n\
|
||
\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\
|
||
-epoch Output information used by epoch 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\
|
||
-b BAUDRATE Set serial port baud rate used for remote debugging\n\
|
||
", stderr);
|
||
#ifdef ADDITIONAL_OPTION_HELP
|
||
fputs (ADDITIONAL_OPTION_HELP, stderr);
|
||
#endif
|
||
fputs ("\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. */
|
||
exit (0);
|
||
}
|
||
|
||
/* OK, that's all the options. The other arguments are filenames. */
|
||
count = 0;
|
||
for (; optind < argc; optind++)
|
||
switch (++count)
|
||
{
|
||
case 1:
|
||
symarg = argv[optind];
|
||
execarg = argv[optind];
|
||
break;
|
||
case 2:
|
||
corearg = argv[optind];
|
||
break;
|
||
case 3:
|
||
fprintf (stderr,
|
||
"Excess command line arguments ignored. (%s%s)\n",
|
||
argv[optind], (optind == argc - 1) ? "" : " ...");
|
||
break;
|
||
}
|
||
if (batch)
|
||
quiet = 1;
|
||
}
|
||
|
||
/* Run the init function of each source file */
|
||
|
||
initialize_cmd_lists (); /* This needs to be done first */
|
||
initialize_all_files ();
|
||
initialize_main (); /* But that omits this file! Do it now */
|
||
init_signals ();
|
||
|
||
if (!quiet)
|
||
{
|
||
/* Print all the junk at the top, with trailing "..." if we are about
|
||
to read a symbol file (possibly slowly). */
|
||
print_gnu_advertisement ();
|
||
print_gdb_version ();
|
||
if (symarg)
|
||
printf_filtered ("..");
|
||
wrap_here();
|
||
fflush (stdout); /* Force to screen during slow operations */
|
||
}
|
||
|
||
error_pre_print = "\n\n";
|
||
|
||
/* Now perform all the actions indicated by the arguments. */
|
||
if (cdarg != NULL)
|
||
{
|
||
if (!setjmp (to_top_level))
|
||
{
|
||
cd_command (cdarg, 0);
|
||
init_source_path ();
|
||
}
|
||
}
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
for (i = 0; i < ndir; i++)
|
||
if (!setjmp (to_top_level))
|
||
directory_command (dirarg[i], 0);
|
||
free (dirarg);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
if (execarg != NULL
|
||
&& symarg != NULL
|
||
&& strcmp (execarg, symarg) == 0)
|
||
{
|
||
/* The exec file and the symbol-file are the same. If we can't open
|
||
it, better only print one error message. */
|
||
if (!setjmp (to_top_level))
|
||
{
|
||
exec_file_command (execarg, !batch);
|
||
symbol_file_command (symarg, 0);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (execarg != NULL)
|
||
if (!setjmp (to_top_level))
|
||
exec_file_command (execarg, !batch);
|
||
if (symarg != NULL)
|
||
if (!setjmp (to_top_level))
|
||
symbol_file_command (symarg, 0);
|
||
}
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
/* After the symbol file has been read, print a newline to get us
|
||
beyond the copyright line... But errors should still set off
|
||
the error message with a (single) blank line. */
|
||
printf_filtered ("\n");
|
||
error_pre_print = "\n";
|
||
|
||
if (corearg != NULL)
|
||
if (!setjmp (to_top_level))
|
||
core_file_command (corearg, !batch);
|
||
else if (isdigit (corearg[0]) && !setjmp (to_top_level))
|
||
attach_command (corearg, !batch);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
if (ttyarg != NULL)
|
||
if (!setjmp (to_top_level))
|
||
tty_command (ttyarg, !batch);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
#ifdef ADDITIONAL_OPTION_HANDLER
|
||
ADDITIONAL_OPTION_HANDLER;
|
||
#endif
|
||
|
||
/* Error messages should no longer be distinguished with extra output. */
|
||
error_pre_print = 0;
|
||
|
||
{
|
||
struct stat homebuf, cwdbuf;
|
||
char *homedir, *homeinit;
|
||
|
||
/* Read init file, if it exists in home directory */
|
||
homedir = getenv ("HOME");
|
||
if (homedir)
|
||
{
|
||
homeinit = (char *) alloca (strlen (getenv ("HOME")) +
|
||
strlen (gdbinit) + 10);
|
||
strcpy (homeinit, getenv ("HOME"));
|
||
strcat (homeinit, "/");
|
||
strcat (homeinit, gdbinit);
|
||
if (!inhibit_gdbinit && access (homeinit, R_OK) == 0)
|
||
if (!setjmp (to_top_level))
|
||
source_command (homeinit, 0);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
/* Do stats; no need to do them elsewhere since we'll only
|
||
need them if homedir is set. Make sure that they are
|
||
zero in case one of them fails (this guarantees that they
|
||
won't match if either exists). */
|
||
|
||
bzero (&homebuf, sizeof (struct stat));
|
||
bzero (&cwdbuf, sizeof (struct stat));
|
||
|
||
stat (homeinit, &homebuf);
|
||
stat (gdbinit, &cwdbuf); /* We'll only need this if
|
||
homedir was set. */
|
||
}
|
||
|
||
/* Read the input file in the current directory, *if* it isn't
|
||
the same file (it should exist, also). */
|
||
|
||
if (!homedir
|
||
|| bcmp ((char *) &homebuf,
|
||
(char *) &cwdbuf,
|
||
sizeof (struct stat)))
|
||
if (!inhibit_gdbinit && access (gdbinit, R_OK) == 0)
|
||
if (!setjmp (to_top_level))
|
||
source_command (gdbinit, 0);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
}
|
||
|
||
for (i = 0; i < ncmd; i++)
|
||
if (!setjmp (to_top_level))
|
||
{
|
||
if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')
|
||
read_command_file (stdin);
|
||
else
|
||
source_command (cmdarg[i], !batch);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
}
|
||
free (cmdarg);
|
||
|
||
if (batch)
|
||
{
|
||
/* We have hit the end of the batch file. */
|
||
exit (0);
|
||
}
|
||
|
||
/* Do any host- or target-specific hacks. This is used for i960 targets
|
||
to force the user to set a nindy target and spec its parameters. */
|
||
|
||
#ifdef BEFORE_MAIN_LOOP_HOOK
|
||
BEFORE_MAIN_LOOP_HOOK;
|
||
#endif
|
||
|
||
/* The command loop. */
|
||
|
||
while (1)
|
||
{
|
||
if (!setjmp (to_top_level))
|
||
{
|
||
do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */
|
||
command_loop ();
|
||
quit_command ((char *)0, instream == stdin);
|
||
}
|
||
}
|
||
/* No exit -- exit is through quit_command. */
|
||
}
|
||
|
||
/* Execute the line P as a command.
|
||
Pass FROM_TTY as second argument to the defining function. */
|
||
|
||
void
|
||
execute_command (p, from_tty)
|
||
char *p;
|
||
int from_tty;
|
||
{
|
||
register struct cmd_list_element *c;
|
||
register struct command_line *cmdlines;
|
||
|
||
free_all_values ();
|
||
|
||
/* This can happen when command_line_input hits end of file. */
|
||
if (p == NULL)
|
||
return;
|
||
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
if (*p)
|
||
{
|
||
char *arg;
|
||
|
||
c = lookup_cmd (&p, cmdlist, "", 0, 1);
|
||
/* Pass null arg rather than an empty one. */
|
||
arg = *p ? p : 0;
|
||
if (c->class == class_user)
|
||
{
|
||
struct cleanup *old_chain;
|
||
|
||
if (*p)
|
||
error ("User-defined commands cannot take arguments.");
|
||
cmdlines = c->user_commands;
|
||
if (cmdlines == 0)
|
||
/* Null command */
|
||
return;
|
||
|
||
/* Set the instream to 0, indicating execution of a
|
||
user-defined function. */
|
||
old_chain = make_cleanup (source_cleanup, instream);
|
||
instream = (FILE *) 0;
|
||
while (cmdlines)
|
||
{
|
||
execute_command (cmdlines->line, 0);
|
||
cmdlines = cmdlines->next;
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
else if (c->type == set_cmd || c->type == show_cmd)
|
||
do_setshow_command (arg, from_tty & caution, c);
|
||
else if (c->function == NO_FUNCTION)
|
||
error ("That is not a command, just a help topic.");
|
||
else
|
||
(*c->function) (arg, from_tty & caution);
|
||
}
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
void
|
||
command_loop_marker (foo)
|
||
int foo;
|
||
{
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them
|
||
until end of file or error reading instream. */
|
||
void
|
||
command_loop ()
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *command;
|
||
int stdin_is_tty = ISATTY (stdin);
|
||
|
||
while (!feof (instream))
|
||
{
|
||
if (window_hook && instream == stdin)
|
||
(*window_hook) (instream, prompt);
|
||
|
||
quit_flag = 0;
|
||
if (instream == stdin && stdin_is_tty)
|
||
reinitialize_more_filter ();
|
||
old_chain = make_cleanup (command_loop_marker, 0);
|
||
command = command_line_input (instream == stdin ? prompt : 0,
|
||
instream == stdin);
|
||
if (command == 0)
|
||
return;
|
||
execute_command (command, instream == stdin);
|
||
/* Do any commands attached to breakpoint we stopped at. */
|
||
bpstat_do_actions (&stop_bpstat);
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
|
||
/* Commands call this if they do not want to be repeated by null lines. */
|
||
|
||
void
|
||
dont_repeat ()
|
||
{
|
||
/* 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. */
|
||
if (instream == stdin)
|
||
*line = 0;
|
||
}
|
||
|
||
/* Read a line from the stream "instream" without command line editing.
|
||
|
||
It prints PRROMPT once at the start.
|
||
Action is compatible with "readline", e.g. space for the result is
|
||
malloc'd and should be freed by the caller.
|
||
|
||
A NULL return means end of file. */
|
||
char *
|
||
gdb_readline (prrompt)
|
||
char *prrompt;
|
||
{
|
||
int c;
|
||
char *result;
|
||
int input_index = 0;
|
||
int result_size = 80;
|
||
|
||
if (prrompt)
|
||
{
|
||
printf (prrompt);
|
||
fflush (stdout);
|
||
}
|
||
|
||
result = (char *) xmalloc (result_size);
|
||
|
||
while (1)
|
||
{
|
||
/* Read from stdin if we are executing a user defined command.
|
||
This is the right thing for prompt_for_continue, at least. */
|
||
c = fgetc (instream ? instream : stdin);
|
||
|
||
if (c == EOF)
|
||
{
|
||
free (result);
|
||
return NULL;
|
||
}
|
||
|
||
if (c == '\n')
|
||
break;
|
||
|
||
result[input_index++] = c;
|
||
while (input_index >= result_size)
|
||
{
|
||
result_size *= 2;
|
||
result = (char *) xrealloc (result, result_size);
|
||
}
|
||
}
|
||
|
||
result[input_index++] = '\0';
|
||
return result;
|
||
}
|
||
|
||
/* Declaration for fancy readline with command line editing. */
|
||
char *readline ();
|
||
|
||
/* Variables which control command line editing and history
|
||
substitution. These variables are given default values at the end
|
||
of this file. */
|
||
static int command_editing_p;
|
||
static int history_expansion_p;
|
||
static int write_history_p;
|
||
static int history_size;
|
||
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. */
|
||
|
||
/* This can be used for functions which don't want to complete on symbols
|
||
but don't want to complete on anything else either. */
|
||
/* ARGSUSED */
|
||
char **
|
||
noop_completer (text)
|
||
char *text;
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
/* 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.
|
||
The result is NULL if there are no more completions, else a char
|
||
string which is a possible completion. */
|
||
char *
|
||
symbol_completion_function (text, state)
|
||
char *text;
|
||
int state;
|
||
{
|
||
static char **list = (char **)NULL;
|
||
static int index;
|
||
char *output;
|
||
extern char *rl_line_buffer;
|
||
extern int rl_point;
|
||
char *tmp_command, *p;
|
||
struct cmd_list_element *c, *result_list;
|
||
|
||
if (!state)
|
||
{
|
||
/* Free the storage used by LIST, but not by the strings inside. This is
|
||
because rl_complete_internal () frees the strings. */
|
||
if (list)
|
||
free (list);
|
||
list = 0;
|
||
index = 0;
|
||
|
||
/* Decide whether to complete on a list of gdb commands or on
|
||
symbols. */
|
||
tmp_command = (char *) alloca (rl_point + 1);
|
||
p = tmp_command;
|
||
|
||
strncpy (tmp_command, rl_line_buffer, rl_point);
|
||
tmp_command[rl_point] = '\0';
|
||
|
||
if (rl_point == 0)
|
||
{
|
||
/* An empty line we want to consider ambiguous; that is,
|
||
it could be any command. */
|
||
c = (struct cmd_list_element *) -1;
|
||
result_list = 0;
|
||
}
|
||
else
|
||
c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
|
||
|
||
/* Move p up to the next interesting thing. */
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
|
||
if (!c)
|
||
/* He's typed something unrecognizable. Sigh. */
|
||
list = (char **) 0;
|
||
else if (c == (struct cmd_list_element *) -1)
|
||
{
|
||
/* If we didn't recognize everything up to the thing that
|
||
needs completing, and we don't know what command it is
|
||
yet, we are in trouble. Part of the trouble might be
|
||
that the list of delimiters used by readline includes
|
||
'-', which we use in commands. Check for this. */
|
||
if (p + strlen(text) != tmp_command + rl_point) {
|
||
if (tmp_command[rl_point - strlen(text) - 1] == '-')
|
||
text = p;
|
||
else {
|
||
/* This really should not produce an error. Better would
|
||
be to pretend to hit RETURN here; this would produce a
|
||
response like "Ambiguous command: foo, foobar, etc",
|
||
and leave the line available for re-entry with ^P. Instead,
|
||
this error blows away the user's typed input without
|
||
any way to get it back. */
|
||
error (" Unrecognized command.");
|
||
}
|
||
}
|
||
|
||
/* He's typed something ambiguous. This is easier. */
|
||
if (result_list)
|
||
list = complete_on_cmdlist (*result_list->prefixlist, text);
|
||
else
|
||
list = complete_on_cmdlist (cmdlist, text);
|
||
}
|
||
else
|
||
{
|
||
/* 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
|
||
the command.
|
||
2) We need to complete the text of what comes after the
|
||
command. */
|
||
|
||
if (!*p && *text)
|
||
/* Always (might be longer versions of thie command). */
|
||
list = complete_on_cmdlist (result_list, text);
|
||
else if (!*p && !*text)
|
||
{
|
||
if (c->prefixlist)
|
||
list = complete_on_cmdlist (*c->prefixlist, "");
|
||
else
|
||
list = (*c->completer) ("");
|
||
}
|
||
else
|
||
{
|
||
if (c->prefixlist && !c->allow_unknown)
|
||
{
|
||
#if 0
|
||
/* Something like "info adsfkdj". But error() is not
|
||
the proper response; just return no completions
|
||
instead. */
|
||
*p = '\0';
|
||
error ("\"%s\" command requires a subcommand.",
|
||
tmp_command);
|
||
#else
|
||
list = NULL;
|
||
#endif
|
||
}
|
||
else
|
||
list = (*c->completer) (text);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If the debugged program wasn't compiled with symbols, or if we're
|
||
clearly completing on a command and no command matches, return
|
||
NULL. */
|
||
if (!list)
|
||
return ((char *)NULL);
|
||
|
||
output = list[index];
|
||
if (output)
|
||
index++;
|
||
|
||
return (output);
|
||
}
|
||
|
||
#ifdef STOP_SIGNAL
|
||
static void
|
||
stop_sig ()
|
||
{
|
||
#if STOP_SIGNAL == SIGTSTP
|
||
signal (SIGTSTP, SIG_DFL);
|
||
sigsetmask (0);
|
||
kill (getpid (), SIGTSTP);
|
||
signal (SIGTSTP, stop_sig);
|
||
#else
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
printf ("%s", prompt);
|
||
fflush (stdout);
|
||
|
||
/* Forget about any previous command -- null line now will do nothing. */
|
||
dont_repeat ();
|
||
}
|
||
#endif /* STOP_SIGNAL */
|
||
|
||
/* Initialize signal handlers. */
|
||
static void
|
||
do_nothing ()
|
||
{
|
||
}
|
||
|
||
static void
|
||
init_signals ()
|
||
{
|
||
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 can affect the
|
||
GDB process as well as the inferior (the signal handling tables
|
||
might be in memory, shared between the two). Since we establish
|
||
a handler for SIGQUIT, when we call exec it will set the signal
|
||
to SIG_DFL for us. */
|
||
signal (SIGQUIT, do_nothing);
|
||
if (signal (SIGHUP, do_nothing) != SIG_IGN)
|
||
signal (SIGHUP, disconnect);
|
||
signal (SIGFPE, float_handler);
|
||
}
|
||
|
||
/* Read one line from the command input stream `instream'
|
||
into the local static buffer `linebuffer' (whose current length
|
||
is `linelength').
|
||
The buffer is made bigger as necessary.
|
||
Returns the address of the start of the line.
|
||
|
||
NULL is returned for end of file.
|
||
|
||
*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. */
|
||
|
||
char *
|
||
command_line_input (prrompt, repeat)
|
||
char *prrompt;
|
||
int repeat;
|
||
{
|
||
static char *linebuffer = 0;
|
||
static int linelength = 0;
|
||
register char *p;
|
||
char *p1;
|
||
char *rl;
|
||
char *local_prompt = prrompt;
|
||
register int c;
|
||
char *nline;
|
||
char got_eof = 0;
|
||
|
||
if (linebuffer == 0)
|
||
{
|
||
linelength = 80;
|
||
linebuffer = (char *) xmalloc (linelength);
|
||
}
|
||
|
||
p = linebuffer;
|
||
|
||
/* Control-C quits instantly if typed while in this loop
|
||
since it should not wait until the user types a newline. */
|
||
immediate_quit++;
|
||
#ifdef STOP_SIGNAL
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
/* Reports are that some Sys V's don't flush stdout/err on reads
|
||
from stdin, when stdin/out are sockets rather than ttys. So we
|
||
have to do it ourselves, to make emacs-gdb and xxgdb work.
|
||
On other machines, doing this once per input should be a cheap nop. */
|
||
fflush (stdout);
|
||
fflush (stderr);
|
||
|
||
/* Don't use fancy stuff if not talking to stdin. */
|
||
if (command_editing_p && instream == stdin
|
||
&& ISATTY (instream))
|
||
rl = readline (local_prompt);
|
||
else
|
||
rl = gdb_readline (local_prompt);
|
||
|
||
if (!rl || rl == (char *) EOF)
|
||
{
|
||
got_eof = 1;
|
||
break;
|
||
}
|
||
if (strlen(rl) + 1 + (p - linebuffer) > linelength)
|
||
{
|
||
linelength = strlen(rl) + 1 + (p - linebuffer);
|
||
nline = (char *) xrealloc (linebuffer, linelength);
|
||
p += nline - linebuffer;
|
||
linebuffer = nline;
|
||
}
|
||
p1 = rl;
|
||
/* Copy line. Don't copy null at end. (Leaves line alone
|
||
if this was just a newline) */
|
||
while (*p1)
|
||
*p++ = *p1++;
|
||
|
||
free (rl); /* Allocated in readline. */
|
||
|
||
if (p == linebuffer || *(p - 1) != '\\')
|
||
break;
|
||
|
||
p--; /* Put on top of '\'. */
|
||
local_prompt = (char *) 0;
|
||
}
|
||
|
||
#ifdef STOP_SIGNAL
|
||
signal (SIGTSTP, SIG_DFL);
|
||
#endif
|
||
immediate_quit--;
|
||
|
||
if (got_eof)
|
||
return NULL;
|
||
|
||
/* Do history expansion if that is wished. */
|
||
if (history_expansion_p && instream == stdin
|
||
&& ISATTY (instream))
|
||
{
|
||
char *history_value;
|
||
int expanded;
|
||
|
||
*p = '\0'; /* Insert null now. */
|
||
expanded = history_expand (linebuffer, &history_value);
|
||
if (expanded)
|
||
{
|
||
/* Print the changes. */
|
||
printf ("%s\n", history_value);
|
||
|
||
/* If there was an error, call this function again. */
|
||
if (expanded < 0)
|
||
{
|
||
free (history_value);
|
||
return command_line_input (prrompt, repeat);
|
||
}
|
||
if (strlen (history_value) > linelength)
|
||
{
|
||
linelength = strlen (history_value) + 1;
|
||
linebuffer = (char *) xrealloc (linebuffer, linelength);
|
||
}
|
||
strcpy (linebuffer, history_value);
|
||
p = linebuffer + strlen(linebuffer);
|
||
free (history_value);
|
||
}
|
||
}
|
||
|
||
/* If we just got an empty line, and that is supposed
|
||
to repeat the previous command, return the value in the
|
||
global buffer. */
|
||
if (repeat)
|
||
{
|
||
if (p == linebuffer)
|
||
return line;
|
||
p1 = linebuffer;
|
||
while (*p1 == ' ' || *p1 == '\t')
|
||
p1++;
|
||
if (!*p1)
|
||
return line;
|
||
}
|
||
|
||
*p = 0;
|
||
|
||
/* Add line to history if appropriate. */
|
||
if (instream == stdin
|
||
&& ISATTY (stdin) && *linebuffer)
|
||
add_history (linebuffer);
|
||
|
||
/* Note: lines consisting soley of 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 '#'. The kill ring is probably better, but some
|
||
people are in the habit of commenting things out. */
|
||
p1 = linebuffer;
|
||
while ((c = *p1++) != '\0')
|
||
{
|
||
if (c == '"')
|
||
while ((c = *p1++) != '"')
|
||
{
|
||
/* Make sure an escaped '"' doesn't make us think the string
|
||
is ended. */
|
||
if (c == '\\')
|
||
parse_escape (&p1);
|
||
if (c == '\0')
|
||
break;
|
||
}
|
||
else if (c == '\'')
|
||
while ((c = *p1++) != '\'')
|
||
{
|
||
/* Make sure an escaped '\'' doesn't make us think the string
|
||
is ended. */
|
||
if (c == '\\')
|
||
parse_escape (&p1);
|
||
if (c == '\0')
|
||
break;
|
||
}
|
||
else if (c == '#')
|
||
{
|
||
/* Found a comment. */
|
||
p1[-1] = '\0';
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Save into global buffer if appropriate. */
|
||
if (repeat)
|
||
{
|
||
if (linelength > linesize)
|
||
{
|
||
line = xrealloc (line, linelength);
|
||
linesize = linelength;
|
||
}
|
||
strcpy (line, linebuffer);
|
||
return line;
|
||
}
|
||
|
||
return linebuffer;
|
||
}
|
||
|
||
/* Read lines from the input stream
|
||
and accumulate them in a chain of struct command_line's
|
||
which is then returned. */
|
||
|
||
struct command_line *
|
||
read_command_lines ()
|
||
{
|
||
struct command_line *first = 0;
|
||
register struct command_line *next, *tail = 0;
|
||
register char *p, *p1;
|
||
struct cleanup *old_chain = 0;
|
||
|
||
while (1)
|
||
{
|
||
dont_repeat ();
|
||
p = command_line_input (0, instream == stdin);
|
||
if (p == NULL)
|
||
/* Treat end of file like "end". */
|
||
break;
|
||
|
||
/* Remove leading and trailing blanks. */
|
||
while (*p == ' ' || *p == '\t') p++;
|
||
p1 = p + strlen (p);
|
||
while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) p1--;
|
||
|
||
/* Is this "end"? */
|
||
if (p1 - p == 3 && !strncmp (p, "end", 3))
|
||
break;
|
||
|
||
/* No => add this line to the chain of command lines. */
|
||
next = (struct command_line *) xmalloc (sizeof (struct command_line));
|
||
next->line = savestring (p, p1 - p);
|
||
next->next = 0;
|
||
if (tail)
|
||
{
|
||
tail->next = next;
|
||
}
|
||
else
|
||
{
|
||
/* We just read the first line.
|
||
From now on, arrange to throw away the lines we have
|
||
if we quit or get an error while inside this function. */
|
||
first = next;
|
||
old_chain = make_cleanup (free_command_lines, &first);
|
||
}
|
||
tail = next;
|
||
}
|
||
|
||
dont_repeat ();
|
||
|
||
/* Now we are about to return the chain to our caller,
|
||
so freeing it becomes his responsibility. */
|
||
if (first)
|
||
discard_cleanups (old_chain);
|
||
return first;
|
||
}
|
||
|
||
/* Free a chain of struct command_line's. */
|
||
|
||
void
|
||
free_command_lines (lptr)
|
||
struct command_line **lptr;
|
||
{
|
||
register struct command_line *l = *lptr;
|
||
register struct command_line *next;
|
||
|
||
while (l)
|
||
{
|
||
next = l->next;
|
||
free (l->line);
|
||
free (l);
|
||
l = next;
|
||
}
|
||
}
|
||
|
||
/* Add an element to the list of info subcommands. */
|
||
|
||
void
|
||
add_info (name, fun, doc)
|
||
char *name;
|
||
void (*fun) ();
|
||
char *doc;
|
||
{
|
||
add_cmd (name, no_class, fun, doc, &infolist);
|
||
}
|
||
|
||
/* Add an alias to the list of info subcommands. */
|
||
|
||
void
|
||
add_info_alias (name, oldname, abbrev_flag)
|
||
char *name;
|
||
char *oldname;
|
||
int 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. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
info_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
printf ("\"info\" must be followed by the name of an info command.\n");
|
||
help_list (infolist, "info ", -1, stdout);
|
||
}
|
||
|
||
/* The "show" command with no arguments shows all the settings. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
show_command (arg, from_tty)
|
||
char *arg;
|
||
int from_tty;
|
||
{
|
||
cmd_show_list (showlist, from_tty, "");
|
||
}
|
||
|
||
/* Add an element to the list of commands. */
|
||
|
||
void
|
||
add_com (name, class, fun, doc)
|
||
char *name;
|
||
enum command_class class;
|
||
void (*fun) ();
|
||
char *doc;
|
||
{
|
||
add_cmd (name, class, fun, doc, &cmdlist);
|
||
}
|
||
|
||
/* Add an alias or abbreviation command to the list of commands. */
|
||
|
||
void
|
||
add_com_alias (name, oldname, class, abbrev_flag)
|
||
char *name;
|
||
char *oldname;
|
||
enum command_class class;
|
||
int abbrev_flag;
|
||
{
|
||
add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
|
||
}
|
||
|
||
void
|
||
error_no_arg (why)
|
||
char *why;
|
||
{
|
||
error ("Argument required (%s).", why);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
help_command (command, from_tty)
|
||
char *command;
|
||
int from_tty; /* Ignored */
|
||
{
|
||
help_cmd (command, stdout);
|
||
}
|
||
|
||
static void
|
||
validate_comname (comname)
|
||
char *comname;
|
||
{
|
||
register char *p;
|
||
|
||
if (comname == 0)
|
||
error_no_arg ("name of command to define");
|
||
|
||
p = comname;
|
||
while (*p)
|
||
{
|
||
if (!(*p >= 'A' && *p <= 'Z')
|
||
&& !(*p >= 'a' && *p <= 'z')
|
||
&& !(*p >= '0' && *p <= '9')
|
||
&& *p != '-')
|
||
error ("Junk in argument list: \"%s\"", p);
|
||
p++;
|
||
}
|
||
}
|
||
|
||
static void
|
||
define_command (comname, from_tty)
|
||
char *comname;
|
||
int from_tty;
|
||
{
|
||
register struct command_line *cmds;
|
||
register struct cmd_list_element *c, *newc;
|
||
char *tem = comname;
|
||
extern void not_just_help_class_command ();
|
||
|
||
validate_comname (comname);
|
||
|
||
c = lookup_cmd (&tem, cmdlist, "", -1, 1);
|
||
if (c)
|
||
{
|
||
if (c->class == class_user || c->class == class_alias)
|
||
tem = "Redefine command \"%s\"? ";
|
||
else
|
||
tem = "Really redefine built-in command \"%s\"? ";
|
||
if (!query (tem, comname))
|
||
error ("Command \"%s\" not redefined.", comname);
|
||
}
|
||
|
||
if (from_tty)
|
||
{
|
||
printf ("Type commands for definition of \"%s\".\n\
|
||
End with a line saying just \"end\".\n", comname);
|
||
fflush (stdout);
|
||
}
|
||
comname = savestring (comname, strlen (comname));
|
||
|
||
cmds = read_command_lines ();
|
||
|
||
if (c && c->class == class_user)
|
||
free_command_lines (&c->user_commands);
|
||
|
||
newc = add_cmd (comname, class_user, not_just_help_class_command,
|
||
(c && c->class == class_user)
|
||
? c->doc : savestring ("User-defined.", 13), &cmdlist);
|
||
newc->user_commands = cmds;
|
||
}
|
||
|
||
static void
|
||
document_command (comname, from_tty)
|
||
char *comname;
|
||
int from_tty;
|
||
{
|
||
struct command_line *doclines;
|
||
register struct cmd_list_element *c;
|
||
char *tem = comname;
|
||
|
||
validate_comname (comname);
|
||
|
||
c = lookup_cmd (&tem, cmdlist, "", 0, 1);
|
||
|
||
if (c->class != class_user)
|
||
error ("Command \"%s\" is built-in.", comname);
|
||
|
||
if (from_tty)
|
||
printf ("Type documentation for \"%s\".\n\
|
||
End with a line saying just \"end\".\n", comname);
|
||
|
||
doclines = read_command_lines ();
|
||
|
||
if (c->doc) free (c->doc);
|
||
|
||
{
|
||
register struct command_line *cl1;
|
||
register int len = 0;
|
||
|
||
for (cl1 = doclines; cl1; cl1 = cl1->next)
|
||
len += strlen (cl1->line) + 1;
|
||
|
||
c->doc = (char *) xmalloc (len + 1);
|
||
*c->doc = 0;
|
||
|
||
for (cl1 = doclines; cl1; cl1 = cl1->next)
|
||
{
|
||
strcat (c->doc, cl1->line);
|
||
if (cl1->next)
|
||
strcat (c->doc, "\n");
|
||
}
|
||
}
|
||
|
||
free_command_lines (&doclines);
|
||
}
|
||
|
||
static void
|
||
print_gnu_advertisement()
|
||
{
|
||
printf ("\
|
||
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\
|
||
There is absolutely no warranty for GDB; type \"info warranty\" for details.\n\
|
||
");
|
||
}
|
||
|
||
static void
|
||
print_gdb_version ()
|
||
{
|
||
printf_filtered ("\
|
||
GDB %s, Copyright 1991 Free Software Foundation, Inc.",
|
||
version);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
show_version (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
immediate_quit++;
|
||
print_gnu_advertisement ();
|
||
print_gdb_version ();
|
||
printf_filtered ("\n");
|
||
immediate_quit--;
|
||
}
|
||
|
||
/* xgdb calls this to reprint the usual GDB prompt. */
|
||
|
||
void
|
||
print_prompt ()
|
||
{
|
||
printf ("%s", prompt);
|
||
fflush (stdout);
|
||
}
|
||
|
||
static void
|
||
quit_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
if (inferior_pid != 0 && target_has_execution)
|
||
{
|
||
if (query ("The program is running. Quit anyway? "))
|
||
{
|
||
target_kill (args, from_tty);
|
||
}
|
||
else
|
||
error ("Not confirmed.");
|
||
}
|
||
/* Save the history information if it is appropriate to do so. */
|
||
if (write_history_p && history_filename)
|
||
write_history (history_filename);
|
||
exit (0);
|
||
}
|
||
|
||
int
|
||
input_from_terminal_p ()
|
||
{
|
||
return (instream == stdin) & caution;
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
pwd_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
if (args) error ("The \"pwd\" command does not take an argument: %s", args);
|
||
getwd (dirbuf);
|
||
|
||
if (strcmp (dirbuf, current_directory))
|
||
printf ("Working directory %s\n (canonically %s).\n",
|
||
current_directory, dirbuf);
|
||
else
|
||
printf ("Working directory %s.\n", current_directory);
|
||
}
|
||
|
||
static void
|
||
cd_command (dir, from_tty)
|
||
char *dir;
|
||
int from_tty;
|
||
{
|
||
int len;
|
||
int change;
|
||
|
||
/* If the new directory is absolute, repeat is a no-op; if relative,
|
||
repeat might be useful but is more likely to be a mistake. */
|
||
dont_repeat ();
|
||
|
||
if (dir == 0)
|
||
error_no_arg ("new working directory");
|
||
|
||
dir = tilde_expand (dir);
|
||
make_cleanup (free, dir);
|
||
|
||
len = strlen (dir);
|
||
dir = savestring (dir, len - (len > 1 && dir[len-1] == '/'));
|
||
if (dir[0] == '/')
|
||
current_directory = dir;
|
||
else
|
||
{
|
||
current_directory = concat (current_directory, "/", dir);
|
||
free (dir);
|
||
}
|
||
|
||
/* Now simplify any occurrences of `.' and `..' in the pathname. */
|
||
|
||
change = 1;
|
||
while (change)
|
||
{
|
||
char *p;
|
||
change = 0;
|
||
|
||
for (p = current_directory; *p;)
|
||
{
|
||
if (!strncmp (p, "/./", 2)
|
||
&& (p[2] == 0 || p[2] == '/'))
|
||
strcpy (p, p + 2);
|
||
else if (!strncmp (p, "/..", 3)
|
||
&& (p[3] == 0 || p[3] == '/')
|
||
&& p != current_directory)
|
||
{
|
||
char *q = p;
|
||
while (q != current_directory && q[-1] != '/') q--;
|
||
if (q != current_directory)
|
||
{
|
||
strcpy (q-1, p+3);
|
||
p = q-1;
|
||
}
|
||
}
|
||
else p++;
|
||
}
|
||
}
|
||
|
||
if (chdir (dir) < 0)
|
||
perror_with_name (dir);
|
||
|
||
forget_cached_source_info ();
|
||
|
||
if (from_tty)
|
||
pwd_command ((char *) 0, 1);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
source_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
FILE *stream;
|
||
struct cleanup *cleanups;
|
||
char *file = args;
|
||
|
||
if (file == 0)
|
||
/* Let source without arguments read .gdbinit. */
|
||
file = gdbinit;
|
||
|
||
file = tilde_expand (file);
|
||
make_cleanup (free, file);
|
||
|
||
stream = fopen (file, "r");
|
||
if (stream == 0)
|
||
perror_with_name (file);
|
||
|
||
cleanups = make_cleanup (fclose, stream);
|
||
|
||
read_command_file (stream);
|
||
|
||
do_cleanups (cleanups);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
echo_command (text, from_tty)
|
||
char *text;
|
||
int from_tty;
|
||
{
|
||
char *p = text;
|
||
register int c;
|
||
|
||
if (text)
|
||
while (c = *p++)
|
||
{
|
||
if (c == '\\')
|
||
{
|
||
/* \ at end of argument is used after spaces
|
||
so they won't be lost. */
|
||
if (*p == 0)
|
||
return;
|
||
|
||
c = parse_escape (&p);
|
||
if (c >= 0)
|
||
fputc (c, stdout);
|
||
}
|
||
else
|
||
fputc (c, stdout);
|
||
}
|
||
fflush (stdout);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
dump_me_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
if (query ("Should GDB dump core? "))
|
||
{
|
||
signal (SIGQUIT, SIG_DFL);
|
||
kill (getpid (), SIGQUIT);
|
||
}
|
||
}
|
||
|
||
/* Functions to manipulate command line editing control variables. */
|
||
|
||
/* Number of commands to print in each call to show_commands. */
|
||
#define Hist_print 10
|
||
static void
|
||
show_commands (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
/* Index for history commands. Relative to history_base. */
|
||
int offset;
|
||
|
||
/* Number of the history entry which we are planning to display next.
|
||
Relative to history_base. */
|
||
static int num = 0;
|
||
|
||
/* 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. */
|
||
int hist_len;
|
||
|
||
struct _hist_entry *history_get();
|
||
extern int history_base;
|
||
|
||
#if 0
|
||
/* This is all reported by individual "show" commands. */
|
||
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",
|
||
history_size);
|
||
printf_filtered ("The name of the history record is \"%s\".\n\n",
|
||
history_filename ? history_filename : "");
|
||
#endif /* 0 */
|
||
|
||
/* Print out some of the commands from the command history. */
|
||
/* First determine the length of the history list. */
|
||
hist_len = history_size;
|
||
for (offset = 0; offset < history_size; offset++)
|
||
{
|
||
if (!history_get (history_base + offset))
|
||
{
|
||
hist_len = offset;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (args)
|
||
{
|
||
if (args[0] == '+' && args[1] == '\0')
|
||
/* "info editing +" should print from the stored position. */
|
||
;
|
||
else
|
||
/* "info editing <exp>" should print around command number <exp>. */
|
||
num = (parse_and_eval_address (args) - history_base) - Hist_print / 2;
|
||
}
|
||
/* "info editing" means print the last Hist_print commands. */
|
||
else
|
||
{
|
||
num = hist_len - Hist_print;
|
||
}
|
||
|
||
if (num < 0)
|
||
num = 0;
|
||
|
||
/* 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 < 0)
|
||
num = 0;
|
||
}
|
||
|
||
#if 0
|
||
/* No need for a header now that "info editing" only prints one thing. */
|
||
if (num == hist_len - Hist_print)
|
||
printf_filtered ("The list of the last %d commands is:\n\n", Hist_print);
|
||
else
|
||
printf_filtered ("Some of the stored commands are:\n\n");
|
||
#endif /* 0 */
|
||
|
||
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
|
||
displayed yet. */
|
||
num += Hist_print;
|
||
|
||
/* 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". */
|
||
if (from_tty && args)
|
||
{
|
||
args[0] = '+';
|
||
args[1] = '\0';
|
||
}
|
||
}
|
||
|
||
/* Called by do_setshow_command. */
|
||
/* ARGSUSED */
|
||
static void
|
||
set_history_size_command (args, from_tty, c)
|
||
char *args;
|
||
int from_tty;
|
||
struct cmd_list_element *c;
|
||
{
|
||
if (history_size == UINT_MAX)
|
||
unstifle_history ();
|
||
else
|
||
stifle_history (history_size);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
set_history (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
printf ("\"set history\" must be followed by the name of a history subcommand.\n");
|
||
help_list (sethistlist, "set history ", -1, stdout);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
show_history (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
cmd_show_list (showhistlist, from_tty, "");
|
||
}
|
||
|
||
int info_verbose = 0; /* Default verbose msgs off */
|
||
|
||
/* Called by do_setshow_command. An elaborate joke. */
|
||
/* ARGSUSED */
|
||
static void
|
||
set_verbose (args, from_tty, c)
|
||
char *args;
|
||
int from_tty;
|
||
struct cmd_list_element *c;
|
||
{
|
||
char *cmdname = "verbose";
|
||
struct cmd_list_element *showcmd;
|
||
|
||
showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
|
||
|
||
if (info_verbose)
|
||
{
|
||
c->doc = "Set verbose printing of informational messages.";
|
||
showcmd->doc = "Show verbose printing of informational messages.";
|
||
}
|
||
else
|
||
{
|
||
c->doc = "Set verbosity.";
|
||
showcmd->doc = "Show verbosity.";
|
||
}
|
||
}
|
||
|
||
static void
|
||
float_handler ()
|
||
{
|
||
/* This message is based on ANSI C, section 4.7. Note that integer
|
||
divide by zero causes this, so "float" is a misnomer. */
|
||
error ("Erroneous arithmetic operation.");
|
||
}
|
||
|
||
/* Return whether we are running a batch file or from terminal. */
|
||
int
|
||
batch_mode ()
|
||
{
|
||
return !(instream == stdin && ISATTY (stdin));
|
||
}
|
||
|
||
|
||
static void
|
||
initialize_cmd_lists ()
|
||
{
|
||
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;
|
||
showlist = NULL;
|
||
sethistlist = (struct cmd_list_element *) 0;
|
||
showhistlist = NULL;
|
||
unsethistlist = (struct cmd_list_element *) 0;
|
||
}
|
||
|
||
static void
|
||
initialize_main ()
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
char *tmpenv;
|
||
|
||
#ifdef DEFAULT_PROMPT
|
||
prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT));
|
||
#else
|
||
prompt = savestring ("(gdb) ", 6);
|
||
#endif
|
||
|
||
/* Set the important stuff up for command editing. */
|
||
command_editing_p = 1;
|
||
history_expansion_p = 0;
|
||
write_history_p = 0;
|
||
|
||
if (tmpenv = getenv ("HISTSIZE"))
|
||
history_size = atoi (tmpenv);
|
||
else
|
||
history_size = 256;
|
||
|
||
stifle_history (history_size);
|
||
|
||
if (tmpenv = getenv ("GDBHISTFILE"))
|
||
history_filename = savestring (tmpenv, strlen(tmpenv));
|
||
else
|
||
/* We include the current directory so that if the user changes
|
||
directories the file written will be the same as the one
|
||
that was read. */
|
||
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, 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);
|
||
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);
|
||
|
||
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_show_from_set
|
||
(add_set_cmd ("prompt", class_support, var_string, (char *)&prompt,
|
||
"Set gdb's prompt",
|
||
&setlist),
|
||
&showlist);
|
||
|
||
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.");
|
||
|
||
#ifdef __STDC__
|
||
add_com ("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.");
|
||
#else
|
||
/* Punt file name, we can't help it easily. */
|
||
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\
|
||
when gdb is started.");
|
||
#endif
|
||
|
||
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 = set_verbose;
|
||
set_verbose (NULL, 0, c);
|
||
|
||
add_com ("dump-me", class_obscure, dump_me_command,
|
||
"Get fatal error; make debugger dump its core.");
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p,
|
||
"Set 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),
|
||
&showlist);
|
||
|
||
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_show_from_set
|
||
(add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p,
|
||
"Set 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),
|
||
&showhistlist);
|
||
|
||
c = add_set_cmd ("size", no_class, var_uinteger, (char *)&history_size,
|
||
"Set the size of the command history, \n\
|
||
ie. the number of previous commands to keep a record of.", &sethistlist);
|
||
add_show_from_set (c, &showhistlist);
|
||
c->function = set_history_size_command;
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("filename", no_class, var_filename, (char *)&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),
|
||
&showhistlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("confirm", class_support, var_boolean,
|
||
(char *)&caution,
|
||
"Set whether to confirm potentially dangerous operations.",
|
||
&setlist),
|
||
&showlist);
|
||
|
||
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_prefix_cmd ("show", class_info, show_command,
|
||
"Generic command for showing things set with \"set\".",
|
||
&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, "Status of command editor.",
|
||
&showlist);
|
||
|
||
add_cmd ("version", no_class, show_version,
|
||
"Report what version of GDB this is.", &showlist);
|
||
}
|