mirror of
https://sourceware.org/git/binutils-gdb.git
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96e5f16150
* remote-mips.c: Use it instead of error() most places. * remote-mips.c (mips_receive_packet): New arg throw_error. (mips_initialize): Use it not catch_errors. * defs.h: Declare error_pre_print and warning_pre_print here... * main.c: ...not here.
2874 lines
76 KiB
C
2874 lines
76 KiB
C
/* Top level `main' program for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
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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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||
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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
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
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||
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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "gdbcmd.h"
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#include "call-cmds.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 "gdbtypes.h"
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||
#include "expression.h"
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||
#include "language.h"
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#include "terminal.h" /* For job_control. */
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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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||
#ifndef NO_SYS_FILE
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#include <sys/file.h>
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#endif
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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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||
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int original_stack_limit;
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#endif
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||
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||
/* Prototypes for local functions */
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||
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||
static char *
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||
symbol_completion_function PARAMS ((char *, int));
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static void
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command_loop PARAMS ((void));
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static void
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command_loop_marker PARAMS ((int));
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static void
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print_gdb_version PARAMS ((GDB_FILE *));
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static void
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quit_command PARAMS ((char *, int));
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static void
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||
init_main PARAMS ((void));
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static void
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init_history PARAMS ((void));
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static void
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init_cmd_lists PARAMS ((void));
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static void
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float_handler PARAMS ((int));
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|
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static void
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source_command PARAMS ((char *, int));
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static void cd_command PARAMS ((char *, int));
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static void
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print_gnu_advertisement PARAMS ((void));
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||
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static void
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init_signals PARAMS ((void));
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static void
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read_command_file PARAMS ((FILE *));
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static void
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set_verbose PARAMS ((char *, int, struct cmd_list_element *));
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static void
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show_history PARAMS ((char *, int));
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static void
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set_history PARAMS ((char *, int));
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static void
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set_history_size_command PARAMS ((char *, int, struct cmd_list_element *));
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static void
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show_commands PARAMS ((char *, int));
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static void
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echo_command PARAMS ((char *, int));
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static void
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pwd_command PARAMS ((char *, int));
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static void
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||
show_version PARAMS ((char *, int));
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|
||
static void
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||
document_command PARAMS ((char *, int));
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static void
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||
define_command PARAMS ((char *, int));
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|
||
static void
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||
validate_comname PARAMS ((char *));
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|
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static void
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||
help_command PARAMS ((char *, int));
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static void
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show_command PARAMS ((char *, int));
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static void
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info_command PARAMS ((char *, int));
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static void
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do_nothing PARAMS ((int));
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static int
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quit_cover PARAMS ((char *));
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static void
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disconnect PARAMS ((int));
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static void
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source_cleanup PARAMS ((FILE *));
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|
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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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||
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#ifndef GDBINIT_FILENAME
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#define GDBINIT_FILENAME ".gdbinit"
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#endif
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static char gdbinit[] = GDBINIT_FILENAME;
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static int inhibit_gdbinit = 0;
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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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||
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extern char *version;
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|
||
/* Canonical host name as a string. */
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||
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extern char *host_canonical;
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|
||
/* Canonical target name as a string. */
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extern char *target_canonical;
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extern char lang_frame_mismatch_warn[]; /* language.c */
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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 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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#if MAINTENANCE_CMDS
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struct cmd_list_element *maintenancelist;
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#endif
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/* Chain containing all defined "maintenance info" subcommands. */
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||
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#if MAINTENANCE_CMDS
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struct cmd_list_element *maintenanceinfolist;
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#endif
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/* Chain containing all defined "maintenance print" subcommands. */
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#if MAINTENANCE_CMDS
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struct cmd_list_element *maintenanceprintlist;
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#endif
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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 *setchecklist;
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struct cmd_list_element *showchecklist;
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/* stdio stream that command input is being read from. Set to stdin normally.
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Set by source_command to the file we are sourcing. Set to NULL if we are
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executing a user-defined command. */
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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[1024];
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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) PARAMS ((FILE *, char *));
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extern int mapped_symbol_files;
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extern int readnow_symbol_files;
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int epoch_interface;
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int xgdb_verbose;
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|
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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 -1, so targets can choose their own defaults. */
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int baud_rate = -1;
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/* Non-zero tells remote* modules to output debugging info. */
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int remote_debug = 0;
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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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static void stop_sig PARAMS ((int));
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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 0 == (HAVE_SIGSETMASK)
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#define sigsetmask(n)
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#endif
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/* Where to go for return_to_top_level (RETURN_ERROR). */
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static jmp_buf error_return;
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/* Where to go for return_to_top_level (RETURN_QUIT). */
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static jmp_buf quit_return;
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/* Temporary variable for SET_TOP_LEVEL. */
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static int top_level_val;
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/* Do a setjmp on error_return and quit_return. catch_errors is
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generally a cleaner way to do this, but main() would look pretty
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ugly if it had to use catch_errors each time. */
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#define SET_TOP_LEVEL() \
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(((top_level_val = setjmp (error_return)) \
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? (PTR) 0 : (PTR) memcpy (quit_return, error_return, sizeof (jmp_buf))) \
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, top_level_val)
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/* Return for reason REASON. This generally gets back to the command
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loop, but can be caught via catch_errors. */
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NORETURN void
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return_to_top_level (reason)
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enum return_reason reason;
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{
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quit_flag = 0;
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immediate_quit = 0;
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/* Perhaps it would be cleaner to do this via the cleanup chain (not sure
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I can think of a reason why that is vital, though). */
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bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */
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disable_current_display ();
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do_cleanups (ALL_CLEANUPS);
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(NORETURN void) longjmp
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(reason == RETURN_ERROR ? error_return : quit_return, 1);
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}
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/* Call FUNC with arg ARGS, catching any errors. If there is no
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error, return the value returned by FUNC. If there is an error,
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print ERRSTRING, print the specific error message, then return
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zero.
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Must not be called with immediate_quit in effect (bad things might
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happen, say we got a signal in the middle of a memcpy to quit_return).
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This is an OK restriction; with very few exceptions immediate_quit can
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be replaced by judicious use of QUIT.
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MASK specifies what to catch; it is normally set to
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RETURN_MASK_ALL, if for no other reason than that the code which
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calls catch_errors might not be set up to deal with a quit which
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isn't caught. But if the code can deal with it, it generally
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should be RETURN_MASK_ERROR, unless for some reason it is more
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useful to abort only the portion of the operation inside the
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catch_errors. Note that quit should return to the command line
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fairly quickly, even if some further processing is being done. */
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int
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catch_errors (func, args, errstring, mask)
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int (*func) PARAMS ((char *));
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PTR args;
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char *errstring;
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return_mask mask;
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{
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jmp_buf saved_error;
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jmp_buf saved_quit;
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jmp_buf tmp_jmp;
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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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if (mask & RETURN_MASK_ERROR)
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memcpy ((char *)saved_error, (char *)error_return, sizeof (jmp_buf));
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if (mask & RETURN_MASK_QUIT)
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memcpy (saved_quit, quit_return, sizeof (jmp_buf));
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error_pre_print = errstring;
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if (setjmp (tmp_jmp) == 0)
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{
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if (mask & RETURN_MASK_ERROR)
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memcpy (error_return, tmp_jmp, sizeof (jmp_buf));
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if (mask & RETURN_MASK_QUIT)
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memcpy (quit_return, tmp_jmp, sizeof (jmp_buf));
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val = (*func) (args);
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}
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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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if (mask & RETURN_MASK_ERROR)
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memcpy (error_return, saved_error, sizeof (jmp_buf));
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if (mask & RETURN_MASK_QUIT)
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memcpy (quit_return, saved_quit, 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 (signo)
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int signo;
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{
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catch_errors (quit_cover, NULL,
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"Could not kill the program being debugged", RETURN_MASK_ALL);
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signal (SIGHUP, SIG_DFL);
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kill (getpid (), SIGHUP);
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}
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/* Just a little helper function for disconnect(). */
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static int
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quit_cover (s)
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char *s;
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{
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caution = 0; /* Throw caution to the wind -- we're exiting.
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This prevents asking the user dumb questions. */
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quit_command((char *)0, 0);
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return 0;
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}
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|
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/* Line number we are currently in in a file which is being sourced. */
|
||
static int source_line_number;
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/* Name of the file we are sourcing. */
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static char *source_file_name;
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/* Buffer containing the error_pre_print used by the source stuff.
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Malloc'd. */
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static char *source_error;
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static int source_error_allocated;
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||
|
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/* Something to glom on to the start of error_pre_print if source_file_name
|
||
is set. */
|
||
static char *source_pre_error;
|
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|
||
/* Clean up on error during a "source" command (or execution of a
|
||
user-defined command). */
|
||
|
||
static void
|
||
source_cleanup (stream)
|
||
FILE *stream;
|
||
{
|
||
/* Restore the previous input stream. */
|
||
instream = stream;
|
||
}
|
||
|
||
/* Read commands from STREAM. */
|
||
static void
|
||
read_command_file (stream)
|
||
FILE *stream;
|
||
{
|
||
struct cleanup *cleanups;
|
||
|
||
cleanups = make_cleanup (source_cleanup, instream);
|
||
instream = stream;
|
||
command_loop ();
|
||
do_cleanups (cleanups);
|
||
}
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int count;
|
||
static int quiet = 0;
|
||
static int batch = 0;
|
||
|
||
/* Pointers to various arguments from command line. */
|
||
char *symarg = NULL;
|
||
char *execarg = NULL;
|
||
char *corearg = NULL;
|
||
char *cdarg = NULL;
|
||
char *ttyarg = NULL;
|
||
|
||
/* These are static so that we can take their address in an initializer. */
|
||
static int print_help;
|
||
static int print_version;
|
||
|
||
/* Pointers to all arguments of --command option. */
|
||
char **cmdarg;
|
||
/* Allocated size of cmdarg. */
|
||
int cmdsize;
|
||
/* Number of elements of cmdarg used. */
|
||
int ncmd;
|
||
|
||
/* Indices of all arguments of --directory option. */
|
||
char **dirarg;
|
||
/* Allocated size. */
|
||
int dirsize;
|
||
/* Number of elements used. */
|
||
int ndir;
|
||
|
||
struct stat homebuf, cwdbuf;
|
||
char *homedir, *homeinit;
|
||
|
||
register int i;
|
||
|
||
/* This needs to happen before the first use of malloc. */
|
||
init_malloc ((PTR) NULL);
|
||
|
||
#if defined (ALIGN_STACK_ON_STARTUP)
|
||
i = (int) &count & 0x3;
|
||
if (i != 0)
|
||
alloca (4 - i);
|
||
#endif
|
||
|
||
/* If error() is called from initialization code, just exit */
|
||
if (SET_TOP_LEVEL ()) {
|
||
exit(1);
|
||
}
|
||
|
||
cmdsize = 1;
|
||
cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));
|
||
ncmd = 0;
|
||
dirsize = 1;
|
||
dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
|
||
ndir = 0;
|
||
|
||
quit_flag = 0;
|
||
line = (char *) xmalloc (linesize);
|
||
line[0] = '\0'; /* Terminate saved (now empty) cmd line */
|
||
instream = stdin;
|
||
|
||
getcwd (dirbuf, sizeof (dirbuf));
|
||
current_directory = dirbuf;
|
||
|
||
#ifdef SET_STACK_LIMIT_HUGE
|
||
{
|
||
struct rlimit rlim;
|
||
|
||
/* Set the stack limit huge so that alloca (particularly stringtab
|
||
* in dbxread.c) does not fail. */
|
||
getrlimit (RLIMIT_STACK, &rlim);
|
||
original_stack_limit = rlim.rlim_cur;
|
||
rlim.rlim_cur = rlim.rlim_max;
|
||
setrlimit (RLIMIT_STACK, &rlim);
|
||
}
|
||
#endif /* SET_STACK_LIMIT_HUGE */
|
||
|
||
/* Parse arguments and options. */
|
||
{
|
||
int c;
|
||
/* When var field is 0, use flag field to record the equivalent
|
||
short option (or arbitrary numbers starting at 10 for those
|
||
with no equivalent). */
|
||
static struct option long_options[] =
|
||
{
|
||
{"readnow", no_argument, &readnow_symbol_files, 1},
|
||
{"r", no_argument, &readnow_symbol_files, 1},
|
||
{"mapped", no_argument, &mapped_symbol_files, 1},
|
||
{"m", no_argument, &mapped_symbol_files, 1},
|
||
{"quiet", no_argument, &quiet, 1},
|
||
{"q", no_argument, &quiet, 1},
|
||
{"silent", no_argument, &quiet, 1},
|
||
{"nx", no_argument, &inhibit_gdbinit, 1},
|
||
{"n", no_argument, &inhibit_gdbinit, 1},
|
||
{"batch", no_argument, &batch, 1},
|
||
{"epoch", no_argument, &epoch_interface, 1},
|
||
{"fullname", no_argument, &frame_file_full_name, 1},
|
||
{"f", no_argument, &frame_file_full_name, 1},
|
||
{"help", no_argument, &print_help, 1},
|
||
{"se", required_argument, 0, 10},
|
||
{"symbols", required_argument, 0, 's'},
|
||
{"s", required_argument, 0, 's'},
|
||
{"exec", required_argument, 0, 'e'},
|
||
{"e", required_argument, 0, 'e'},
|
||
{"core", required_argument, 0, 'c'},
|
||
{"c", required_argument, 0, 'c'},
|
||
{"command", required_argument, 0, 'x'},
|
||
{"version", no_argument, &print_version, 1},
|
||
{"x", required_argument, 0, 'x'},
|
||
{"directory", required_argument, 0, 'd'},
|
||
{"cd", required_argument, 0, 11},
|
||
{"tty", required_argument, 0, 't'},
|
||
{"baud", required_argument, 0, 'b'},
|
||
{"b", required_argument, 0, 'b'},
|
||
/* Allow machine descriptions to add more options... */
|
||
#ifdef ADDITIONAL_OPTIONS
|
||
ADDITIONAL_OPTIONS
|
||
#endif
|
||
{0, no_argument, 0, 0},
|
||
};
|
||
|
||
while (1)
|
||
{
|
||
int option_index;
|
||
|
||
c = getopt_long_only (argc, argv, "",
|
||
long_options, &option_index);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
/* Long option that takes an argument. */
|
||
if (c == 0 && long_options[option_index].flag == 0)
|
||
c = long_options[option_index].val;
|
||
|
||
switch (c)
|
||
{
|
||
case 0:
|
||
/* Long option that just sets a flag. */
|
||
break;
|
||
case 10:
|
||
symarg = optarg;
|
||
execarg = optarg;
|
||
break;
|
||
case 11:
|
||
cdarg = optarg;
|
||
break;
|
||
case 's':
|
||
symarg = optarg;
|
||
break;
|
||
case 'e':
|
||
execarg = optarg;
|
||
break;
|
||
case 'c':
|
||
corearg = optarg;
|
||
break;
|
||
case 'x':
|
||
cmdarg[ncmd++] = optarg;
|
||
if (ncmd >= cmdsize)
|
||
{
|
||
cmdsize *= 2;
|
||
cmdarg = (char **) xrealloc ((char *)cmdarg,
|
||
cmdsize * sizeof (*cmdarg));
|
||
}
|
||
break;
|
||
case 'd':
|
||
dirarg[ndir++] = optarg;
|
||
if (ndir >= dirsize)
|
||
{
|
||
dirsize *= 2;
|
||
dirarg = (char **) xrealloc ((char *)dirarg,
|
||
dirsize * sizeof (*dirarg));
|
||
}
|
||
break;
|
||
case 't':
|
||
ttyarg = optarg;
|
||
break;
|
||
case 'q':
|
||
quiet = 1;
|
||
break;
|
||
case 'b':
|
||
{
|
||
int i;
|
||
char *p;
|
||
|
||
i = strtol (optarg, &p, 0);
|
||
if (i == 0 && p == optarg)
|
||
warning ("Could not set baud rate to `%s'.\n", optarg);
|
||
else
|
||
baud_rate = i;
|
||
}
|
||
break;
|
||
|
||
#ifdef ADDITIONAL_OPTION_CASES
|
||
ADDITIONAL_OPTION_CASES
|
||
#endif
|
||
case '?':
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"Use `%s --help' for a complete list of options.\n",
|
||
argv[0]);
|
||
exit (1);
|
||
}
|
||
}
|
||
|
||
/* 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_unfiltered (gdb_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 */
|
||
|
||
init_cmd_lists (); /* This needs to be done first */
|
||
initialize_all_files ();
|
||
init_main (); /* But that omits this file! Do it now */
|
||
init_signals ();
|
||
|
||
/* Do these (and anything which might call wrap_here or *_filtered)
|
||
after initialize_all_files. */
|
||
if (print_version)
|
||
{
|
||
print_gdb_version (gdb_stdout);
|
||
wrap_here ("");
|
||
printf_filtered ("\n");
|
||
exit (0);
|
||
}
|
||
|
||
if (print_help)
|
||
{
|
||
/* --version is intentionally not documented here, because we
|
||
are printing the version here, and the help is long enough
|
||
already. */
|
||
|
||
print_gdb_version (gdb_stdout);
|
||
/* Make sure the output gets printed. */
|
||
wrap_here ("");
|
||
printf_filtered ("\n");
|
||
|
||
/* But don't use *_filtered here. We don't want to prompt for continue
|
||
no matter how small the screen or how much we're going to print. */
|
||
fputs_unfiltered ("\
|
||
This is the GNU debugger. Usage:\n\
|
||
gdb [options] [executable-file [core-file or process-id]]\n\
|
||
Options:\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\
|
||
--mapped Use mapped symbol files if supported on this system.\n\
|
||
--readnow Fully read symbol files on first access.\n\
|
||
", gdb_stdout);
|
||
#ifdef ADDITIONAL_OPTION_HELP
|
||
fputs_unfiltered (ADDITIONAL_OPTION_HELP, gdb_stdout);
|
||
#endif
|
||
fputs_unfiltered ("\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", gdb_stdout);
|
||
exit (0);
|
||
}
|
||
|
||
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 (gdb_stdout);
|
||
if (symarg)
|
||
printf_filtered ("..");
|
||
wrap_here("");
|
||
gdb_flush (gdb_stdout); /* Force to screen during slow operations */
|
||
}
|
||
|
||
error_pre_print = "\n\n";
|
||
/* We may get more than one warning, don't double space all of them... */
|
||
warning_pre_print = "\nwarning: ";
|
||
|
||
/* We need a default language for parsing expressions, so simple things like
|
||
"set width 0" won't fail if no language is explicitly set in a config file
|
||
or implicitly set by reading an executable during startup. */
|
||
set_language (language_c);
|
||
expected_language = current_language; /* don't warn about the change. */
|
||
|
||
/* Read and execute $HOME/.gdbinit file, if it exists. This is done
|
||
*before* all the command line arguments are processed; it sets
|
||
global parameters, which are independent of what file you are
|
||
debugging or what directory you are in. */
|
||
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 (!SET_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). */
|
||
|
||
memset (&homebuf, 0, sizeof (struct stat));
|
||
memset (&cwdbuf, 0, sizeof (struct stat));
|
||
|
||
stat (homeinit, &homebuf);
|
||
stat (gdbinit, &cwdbuf); /* We'll only need this if
|
||
homedir was set. */
|
||
}
|
||
|
||
/* Now perform all the actions indicated by the arguments. */
|
||
if (cdarg != NULL)
|
||
{
|
||
if (!SET_TOP_LEVEL ())
|
||
{
|
||
cd_command (cdarg, 0);
|
||
init_source_path ();
|
||
}
|
||
}
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
for (i = 0; i < ndir; i++)
|
||
if (!SET_TOP_LEVEL ())
|
||
directory_command (dirarg[i], 0);
|
||
free ((PTR)dirarg);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
if (execarg != NULL
|
||
&& symarg != NULL
|
||
&& STREQ (execarg, symarg))
|
||
{
|
||
/* The exec file and the symbol-file are the same. If we can't open
|
||
it, better only print one error message. */
|
||
if (!SET_TOP_LEVEL ())
|
||
{
|
||
exec_file_command (execarg, !batch);
|
||
symbol_file_command (symarg, 0);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (execarg != NULL)
|
||
if (!SET_TOP_LEVEL ())
|
||
exec_file_command (execarg, !batch);
|
||
if (symarg != NULL)
|
||
if (!SET_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. */
|
||
if (!quiet)
|
||
printf_filtered ("\n");
|
||
error_pre_print = "\n";
|
||
warning_pre_print = "\nwarning: ";
|
||
|
||
if (corearg != NULL)
|
||
if (!SET_TOP_LEVEL ())
|
||
core_file_command (corearg, !batch);
|
||
else if (isdigit (corearg[0]) && !SET_TOP_LEVEL ())
|
||
attach_command (corearg, !batch);
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
if (ttyarg != NULL)
|
||
if (!SET_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;
|
||
warning_pre_print = "warning: ";
|
||
|
||
/* Read the .gdbinit file in the current directory, *if* it isn't
|
||
the same as the $HOME/.gdbinit file (it should exist, also). */
|
||
|
||
if (!homedir
|
||
|| memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
|
||
if (!inhibit_gdbinit && access (gdbinit, R_OK) == 0)
|
||
{
|
||
if (!SET_TOP_LEVEL ())
|
||
source_command (gdbinit, 0);
|
||
}
|
||
do_cleanups (ALL_CLEANUPS);
|
||
|
||
for (i = 0; i < ncmd; i++)
|
||
{
|
||
if (!SET_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 ((PTR)cmdarg);
|
||
|
||
/* Read in the old history after all the command files have been read. */
|
||
init_history();
|
||
|
||
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 (!SET_TOP_LEVEL ())
|
||
{
|
||
do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */
|
||
command_loop ();
|
||
quit_command ((char *)0, instream == stdin);
|
||
}
|
||
}
|
||
/* No exit -- exit is through quit_command. */
|
||
}
|
||
|
||
void
|
||
execute_user_command (c, args)
|
||
struct cmd_list_element *c;
|
||
char *args;
|
||
{
|
||
register struct command_line *cmdlines;
|
||
struct cleanup *old_chain;
|
||
|
||
if (args)
|
||
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);
|
||
}
|
||
|
||
/* 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 enum language flang;
|
||
static int warned = 0;
|
||
|
||
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 this command has been hooked, run the hook first. */
|
||
if (c->hook)
|
||
execute_user_command (c->hook, (char *)0);
|
||
|
||
if (c->class == class_user)
|
||
execute_user_command (c, arg);
|
||
else if (c->type == set_cmd || c->type == show_cmd)
|
||
do_setshow_command (arg, from_tty & caution, c);
|
||
else if (c->function.cfunc == NO_FUNCTION)
|
||
error ("That is not a command, just a help topic.");
|
||
else
|
||
(*c->function.cfunc) (arg, from_tty & caution);
|
||
}
|
||
|
||
/* Tell the user if the language has changed (except first time). */
|
||
if (current_language != expected_language)
|
||
{
|
||
if (language_mode == language_mode_auto) {
|
||
language_info (1); /* Print what changed. */
|
||
}
|
||
warned = 0;
|
||
}
|
||
|
||
/* Warn the user if the working language does not match the
|
||
language of the current frame. Only warn the user if we are
|
||
actually running the program, i.e. there is a stack. */
|
||
/* FIXME: This should be cacheing the frame and only running when
|
||
the frame changes. */
|
||
if (target_has_stack)
|
||
{
|
||
flang = get_frame_language ();
|
||
if (!warned
|
||
&& flang != language_unknown
|
||
&& flang != current_language->la_language)
|
||
{
|
||
printf_filtered ("%s\n", lang_frame_mismatch_warn);
|
||
warned = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
command_loop_marker (foo)
|
||
int foo;
|
||
{
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them
|
||
until end of file or error reading instream. */
|
||
static 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 : (char *) NULL,
|
||
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)
|
||
{
|
||
/* Don't use a _filtered function here. It causes the assumed
|
||
character position to be off, since the newline we read from
|
||
the user is not accounted for. */
|
||
fputs_unfiltered (prrompt, gdb_stdout);
|
||
gdb_flush (gdb_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)
|
||
{
|
||
if (input_index > 0)
|
||
/* The last line does not end with a newline. Return it, and
|
||
if we are called again fgetc will still return EOF and
|
||
we'll return NULL then. */
|
||
break;
|
||
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;
|
||
}
|
||
|
||
/* 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;
|
||
|
||
/* readline uses the word breaks for two things:
|
||
(1) In figuring out where to point the TEXT parameter to the
|
||
rl_completion_entry_function. Since we don't use TEXT for much,
|
||
it doesn't matter a lot what the word breaks are for this purpose, but
|
||
it does affect how much stuff M-? lists.
|
||
(2) If one of the matches contains a word break character, readline
|
||
will quote it. That's why we switch between
|
||
gdb_completer_word_break_characters and
|
||
gdb_completer_command_word_break_characters. I'm not sure when
|
||
we need this behavior (perhaps for funky characters in C++ symbols?). */
|
||
|
||
/* Variables which are necessary for fancy command line editing. */
|
||
char *gdb_completer_word_break_characters =
|
||
" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
|
||
|
||
/* When completing on command names, we remove '-' from the list of
|
||
word break characters, since we use it in command names. If the
|
||
readline library sees one in any of the current completion strings,
|
||
it thinks that the string needs to be quoted and automatically supplies
|
||
a leading quote. */
|
||
char *gdb_completer_command_word_break_characters =
|
||
" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
|
||
|
||
/* Characters that can be used to quote completion strings. Note that we
|
||
can't include '"' because the gdb C parser treats such quoted sequences
|
||
as strings. */
|
||
char *gdb_completer_quote_characters =
|
||
"'";
|
||
|
||
/* 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, prefix)
|
||
char *text;
|
||
char *prefix;
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
/* Complete on filenames. */
|
||
char **
|
||
filename_completer (text, word)
|
||
char *text;
|
||
char *word;
|
||
{
|
||
/* From readline. */
|
||
extern char *filename_completion_function ();
|
||
int subsequent_name;
|
||
char **return_val;
|
||
int return_val_used;
|
||
int return_val_alloced;
|
||
|
||
return_val_used = 0;
|
||
/* Small for testing. */
|
||
return_val_alloced = 1;
|
||
return_val = (char **) xmalloc (return_val_alloced * sizeof (char *));
|
||
|
||
subsequent_name = 0;
|
||
while (1)
|
||
{
|
||
char *p;
|
||
p = filename_completion_function (text, subsequent_name);
|
||
if (return_val_used >= return_val_alloced)
|
||
{
|
||
return_val_alloced *= 2;
|
||
return_val =
|
||
(char **) xrealloc (return_val,
|
||
return_val_alloced * sizeof (char *));
|
||
}
|
||
if (p == NULL)
|
||
{
|
||
return_val[return_val_used++] = p;
|
||
break;
|
||
}
|
||
/* Like emacs, don't complete on old versions. Especially useful
|
||
in the "source" command. */
|
||
if (p[strlen (p) - 1] == '~')
|
||
continue;
|
||
|
||
{
|
||
char *q;
|
||
if (word == text)
|
||
/* Return exactly p. */
|
||
return_val[return_val_used++] = p;
|
||
else if (word > text)
|
||
{
|
||
/* Return some portion of p. */
|
||
q = xmalloc (strlen (p) + 5);
|
||
strcpy (q, p + (word - text));
|
||
return_val[return_val_used++] = q;
|
||
free (p);
|
||
}
|
||
else
|
||
{
|
||
/* Return some of TEXT plus p. */
|
||
q = xmalloc (strlen (p) + (text - word) + 5);
|
||
strncpy (q, word, text - word);
|
||
q[text - word] = '\0';
|
||
strcat (q, p);
|
||
return_val[return_val_used++] = q;
|
||
free (p);
|
||
}
|
||
}
|
||
subsequent_name = 1;
|
||
}
|
||
#if 0
|
||
/* There is no way to do this just long enough to affect quote inserting
|
||
without also affecting the next completion. This should be fixed in
|
||
readline. FIXME. */
|
||
/* Insure that readline does the right thing
|
||
with respect to inserting quotes. */
|
||
rl_completer_word_break_characters = "";
|
||
#endif
|
||
return return_val;
|
||
}
|
||
|
||
/* Here are some useful test cases for completion. FIXME: These should
|
||
be put in the test suite. They should be tested with both M-? and TAB.
|
||
|
||
"show output-" "radix"
|
||
"show output" "-radix"
|
||
"p" ambiguous (commands starting with p--path, print, printf, etc.)
|
||
"p " ambiguous (all symbols)
|
||
"info t foo" no completions
|
||
"info t " no completions
|
||
"info t" ambiguous ("info target", "info terminal", etc.)
|
||
"info ajksdlfk" no completions
|
||
"info ajksdlfk " no completions
|
||
"info" " "
|
||
"info " ambiguous (all info commands)
|
||
"p \"a" no completions (string constant)
|
||
"p 'a" ambiguous (all symbols starting with a)
|
||
"p b-a" ambiguous (all symbols starting with a)
|
||
"p b-" ambiguous (all symbols)
|
||
"file Make" "file" (word break hard to screw up here)
|
||
"file ../gdb.stabs/wi" "erd" (needs to not break word at slash)
|
||
*/
|
||
|
||
/* Generate completions one by one for the completer. Each time we are
|
||
called return another potential completion to the caller. The function
|
||
is misnamed; it just completes on commands or passes the buck to the
|
||
command's completer function; the stuff specific to symbol completion
|
||
is in make_symbol_completion_list.
|
||
|
||
TEXT is readline's idea of the "word" we are looking at; we don't really
|
||
like readline's ideas about word breaking so we ignore it.
|
||
|
||
MATCHES is the number of matches that have currently been collected from
|
||
calling this completion function. When zero, then we need to initialize,
|
||
otherwise the initialization has already taken place and we can just
|
||
return the next potential completion string.
|
||
|
||
Returns NULL if there are no more completions, else a pointer to a string
|
||
which is a possible completion.
|
||
|
||
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. */
|
||
|
||
static char *
|
||
symbol_completion_function (text, matches)
|
||
char *text;
|
||
int matches;
|
||
{
|
||
static char **list = (char **)NULL; /* Cache of completions */
|
||
static int index; /* Next cached completion */
|
||
char *output = NULL;
|
||
char *tmp_command, *p;
|
||
/* Pointer within tmp_command which corresponds to text. */
|
||
char *word;
|
||
struct cmd_list_element *c, *result_list;
|
||
extern char *rl_line_buffer;
|
||
extern int rl_point;
|
||
|
||
if (matches == 0)
|
||
{
|
||
/* The caller is beginning to accumulate a new set of completions, so
|
||
we need to find all of them now, and cache them for returning one at
|
||
a time on future calls. */
|
||
|
||
if (list)
|
||
{
|
||
/* Free the storage used by LIST, but not by the strings inside.
|
||
This is because rl_complete_internal () frees the strings. */
|
||
free ((PTR)list);
|
||
}
|
||
list = 0;
|
||
index = 0;
|
||
|
||
/* Choose the default set of word break characters to break completions.
|
||
If we later find out that we are doing completions on command strings
|
||
(as opposed to strings supplied by the individual command completer
|
||
functions, which can be any string) then we will switch to the
|
||
special word break set for command strings, which leaves out the
|
||
'-' character used in some commands. */
|
||
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_word_break_characters;
|
||
|
||
/* 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';
|
||
/* Since text always contains some number of characters leading up
|
||
to rl_point, we can find the equivalent position in tmp_command
|
||
by subtracting that many characters from the end of tmp_command. */
|
||
word = tmp_command + rl_point - strlen (text);
|
||
|
||
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)
|
||
{
|
||
/* It is an unrecognized command. So there are no
|
||
possible completions. */
|
||
list = NULL;
|
||
}
|
||
else if (c == (struct cmd_list_element *) -1)
|
||
{
|
||
char *q;
|
||
|
||
/* lookup_cmd_1 advances p up to the first ambiguous thing, but
|
||
doesn't advance over that thing itself. Do so now. */
|
||
q = p;
|
||
while (*q && (isalnum (*q) || *q == '-' || *q == '_'))
|
||
++q;
|
||
if (q != tmp_command + rl_point)
|
||
{
|
||
/* There is something beyond the ambiguous
|
||
command, so there are no possible completions. For
|
||
example, "info t " or "info t foo" does not complete
|
||
to anything, because "info t" can be "info target" or
|
||
"info terminal". */
|
||
list = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* We're trying to complete on the command which was ambiguous.
|
||
This we can deal with. */
|
||
if (result_list)
|
||
{
|
||
list = complete_on_cmdlist (*result_list->prefixlist, p,
|
||
word);
|
||
}
|
||
else
|
||
{
|
||
list = complete_on_cmdlist (cmdlist, p, word);
|
||
}
|
||
/* Insure that readline does the right thing with respect to
|
||
inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We've recognized a full command. */
|
||
|
||
if (p == tmp_command + rl_point)
|
||
{
|
||
/* There is no non-whitespace in the line beyond the command. */
|
||
|
||
if (p[-1] == ' ' || p[-1] == '\t')
|
||
{
|
||
/* The command is followed by whitespace; we need to complete
|
||
on whatever comes after command. */
|
||
if (c->prefixlist)
|
||
{
|
||
/* It is a prefix command; what comes after it is
|
||
a subcommand (e.g. "info "). */
|
||
list = complete_on_cmdlist (*c->prefixlist, p, word);
|
||
|
||
/* Insure that readline does the right thing
|
||
with respect to inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
else
|
||
{
|
||
/* It is a normal command; what comes after it is
|
||
completed by the command's completer function. */
|
||
list = (*c->completer) (p, word);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* The command is not followed by whitespace; we need to
|
||
complete on the command itself. e.g. "p" which is a
|
||
command itself but also can complete to "print", "ptype"
|
||
etc. */
|
||
char *q;
|
||
|
||
/* Find the command we are completing on. */
|
||
q = p;
|
||
while (q > tmp_command)
|
||
{
|
||
if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_')
|
||
--q;
|
||
else
|
||
break;
|
||
}
|
||
|
||
list = complete_on_cmdlist (result_list, q, word);
|
||
|
||
/* Insure that readline does the right thing
|
||
with respect to inserting quotes. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_command_word_break_characters;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* There is non-whitespace beyond the command. */
|
||
|
||
if (c->prefixlist && !c->allow_unknown)
|
||
{
|
||
/* It is an unrecognized subcommand of a prefix command,
|
||
e.g. "info adsfkdj". */
|
||
list = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* It is a normal command. */
|
||
list = (*c->completer) (p, word);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If we found a list of potential completions during initialization then
|
||
dole them out one at a time. The vector of completions is NULL
|
||
terminated, so after returning the last one, return NULL (and continue
|
||
to do so) each time we are called after that, until a new list is
|
||
available. */
|
||
|
||
if (list)
|
||
{
|
||
output = list[index];
|
||
if (output)
|
||
{
|
||
index++;
|
||
}
|
||
}
|
||
|
||
#if 0
|
||
/* Can't do this because readline hasn't yet checked the word breaks
|
||
for figuring out whether to insert a quote. */
|
||
if (output == NULL)
|
||
/* Make sure the word break characters are set back to normal for the
|
||
next time that readline tries to complete something. */
|
||
rl_completer_word_break_characters =
|
||
gdb_completer_word_break_characters;
|
||
#endif
|
||
|
||
return (output);
|
||
}
|
||
|
||
/* Skip over a possibly quoted word (as defined by the quote characters
|
||
and word break characters the completer uses). Returns pointer to the
|
||
location after the "word". */
|
||
|
||
char *
|
||
skip_quoted (str)
|
||
char *str;
|
||
{
|
||
char quote_char = '\0';
|
||
char *scan;
|
||
|
||
for (scan = str; *scan != '\0'; scan++)
|
||
{
|
||
if (quote_char != '\0')
|
||
{
|
||
/* Ignore everything until the matching close quote char */
|
||
if (*scan == quote_char)
|
||
{
|
||
/* Found matching close quote. */
|
||
scan++;
|
||
break;
|
||
}
|
||
}
|
||
else if (strchr (gdb_completer_quote_characters, *scan))
|
||
{
|
||
/* Found start of a quoted string. */
|
||
quote_char = *scan;
|
||
}
|
||
else if (strchr (gdb_completer_word_break_characters, *scan))
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
return (scan);
|
||
}
|
||
|
||
|
||
#ifdef STOP_SIGNAL
|
||
static void
|
||
stop_sig (signo)
|
||
int signo;
|
||
{
|
||
#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_unfiltered ("%s", prompt);
|
||
gdb_flush (gdb_stdout);
|
||
|
||
/* Forget about any previous command -- null line now will do nothing. */
|
||
dont_repeat ();
|
||
}
|
||
#endif /* STOP_SIGNAL */
|
||
|
||
/* Initialize signal handlers. */
|
||
static void
|
||
do_nothing (signo)
|
||
int signo;
|
||
{
|
||
}
|
||
|
||
static void
|
||
init_signals ()
|
||
{
|
||
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);
|
||
|
||
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
|
||
signal (SIGWINCH, SIGWINCH_HANDLER);
|
||
#endif
|
||
}
|
||
|
||
/* 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 unsigned 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
|
||
if (job_control)
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
/* Reports are that some Sys V's don't flush gdb_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. */
|
||
gdb_flush (gdb_stdout);
|
||
gdb_flush (gdb_stderr);
|
||
|
||
if (source_file_name != NULL)
|
||
{
|
||
++source_line_number;
|
||
sprintf (source_error,
|
||
"%s%s:%d: Error in sourced command file:\n",
|
||
source_pre_error,
|
||
source_file_name,
|
||
source_line_number);
|
||
error_pre_print = source_error;
|
||
}
|
||
|
||
/* 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
|
||
if (job_control)
|
||
signal (STOP_SIGNAL, 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_unfiltered ("%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 ((char *) NULL, 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 ((PTR)l);
|
||
l = next;
|
||
}
|
||
}
|
||
|
||
/* Add an element to the list of info subcommands. */
|
||
|
||
void
|
||
add_info (name, fun, doc)
|
||
char *name;
|
||
void (*fun) PARAMS ((char *, int));
|
||
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_unfiltered ("\"info\" must be followed by the name of an info command.\n");
|
||
help_list (infolist, "info ", -1, gdb_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) PARAMS ((char *, int));
|
||
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, gdb_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 (!isalnum(*p) && *p != '-')
|
||
error ("Junk in argument list: \"%s\"", p);
|
||
p++;
|
||
}
|
||
}
|
||
|
||
/* This is just a placeholder in the command data structures. */
|
||
static void
|
||
user_defined_command (ignore, from_tty)
|
||
char *ignore;
|
||
int from_tty;
|
||
{
|
||
}
|
||
|
||
static void
|
||
define_command (comname, from_tty)
|
||
char *comname;
|
||
int from_tty;
|
||
{
|
||
register struct command_line *cmds;
|
||
register struct cmd_list_element *c, *newc, *hookc = 0;
|
||
char *tem = comname;
|
||
#define HOOK_STRING "hook-"
|
||
#define HOOK_LEN 5
|
||
|
||
validate_comname (comname);
|
||
|
||
/* Look it up, and verify that we got an exact match. */
|
||
c = lookup_cmd (&tem, cmdlist, "", -1, 1);
|
||
if (c && !STREQ (comname, c->name))
|
||
c = 0;
|
||
|
||
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, c->name))
|
||
error ("Command \"%s\" not redefined.", c->name);
|
||
}
|
||
|
||
/* If this new command is a hook, then mark the command which it
|
||
is hooking. Note that we allow hooking `help' commands, so that
|
||
we can hook the `stop' pseudo-command. */
|
||
|
||
if (!strncmp (comname, HOOK_STRING, HOOK_LEN))
|
||
{
|
||
/* Look up cmd it hooks, and verify that we got an exact match. */
|
||
tem = comname+HOOK_LEN;
|
||
hookc = lookup_cmd (&tem, cmdlist, "", -1, 0);
|
||
if (hookc && !STREQ (comname+HOOK_LEN, hookc->name))
|
||
hookc = 0;
|
||
if (!hookc)
|
||
{
|
||
warning ("Your new `%s' command does not hook any existing command.",
|
||
comname);
|
||
if (!query ("Proceed? ", (char *)0))
|
||
error ("Not confirmed.");
|
||
}
|
||
}
|
||
|
||
comname = savestring (comname, strlen (comname));
|
||
|
||
/* If the rest of the commands will be case insensitive, this one
|
||
should behave in the same manner. */
|
||
for (tem = comname; *tem; tem++)
|
||
if (isupper(*tem)) *tem = tolower(*tem);
|
||
|
||
if (from_tty)
|
||
{
|
||
printf_unfiltered ("Type commands for definition of \"%s\".\n\
|
||
End with a line saying just \"end\".\n", comname);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
cmds = read_command_lines ();
|
||
|
||
if (c && c->class == class_user)
|
||
free_command_lines (&c->user_commands);
|
||
|
||
newc = add_cmd (comname, class_user, user_defined_command,
|
||
(c && c->class == class_user)
|
||
? c->doc : savestring ("User-defined.", 13), &cmdlist);
|
||
newc->user_commands = cmds;
|
||
|
||
/* If this new command is a hook, then mark both commands as being
|
||
tied. */
|
||
if (hookc)
|
||
{
|
||
hookc->hook = newc; /* Target gets hooked. */
|
||
newc->hookee = hookc; /* We are marked as hooking target cmd. */
|
||
}
|
||
}
|
||
|
||
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_unfiltered ("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_unfiltered ("\
|
||
GDB is free software and you are welcome to distribute copies of it\n\
|
||
under certain conditions; type \"show copying\" to see the conditions.\n\
|
||
There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
|
||
");
|
||
}
|
||
|
||
static void
|
||
print_gdb_version (stream)
|
||
GDB_FILE *stream;
|
||
{
|
||
fprintf_filtered (stream, "\
|
||
GDB %s (%s", version, host_canonical);
|
||
|
||
if (strcmp(host_canonical, target_canonical))
|
||
fprintf_filtered (stream, " --target %s", target_canonical);
|
||
|
||
fprintf_filtered (stream, "), ");
|
||
wrap_here("");
|
||
fprintf_filtered (stream, "Copyright 1993 Free Software Foundation, Inc.");
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
show_version (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
immediate_quit++;
|
||
print_gnu_advertisement ();
|
||
print_gdb_version (gdb_stdout);
|
||
printf_filtered ("\n");
|
||
immediate_quit--;
|
||
}
|
||
|
||
/* xgdb calls this to reprint the usual GDB prompt. */
|
||
|
||
void
|
||
print_prompt ()
|
||
{
|
||
printf_unfiltered ("%s", prompt);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
quit_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
if (inferior_pid != 0 && target_has_execution)
|
||
{
|
||
if (attach_flag)
|
||
{
|
||
if (query ("The program is running. Quit anyway (and detach it)? "))
|
||
target_detach (args, from_tty);
|
||
else
|
||
error ("Not confirmed.");
|
||
}
|
||
else
|
||
{
|
||
if (query ("The program is running. Quit anyway (and kill it)? "))
|
||
target_kill ();
|
||
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);
|
||
}
|
||
|
||
/* Returns whether GDB is running on a terminal and whether the user
|
||
desires that questions be asked of them on that terminal. */
|
||
|
||
int
|
||
input_from_terminal_p ()
|
||
{
|
||
return gdb_has_a_terminal () && (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);
|
||
getcwd (dirbuf, sizeof (dirbuf));
|
||
|
||
if (!STREQ (dirbuf, current_directory))
|
||
printf_unfiltered ("Working directory %s\n (canonically %s).\n",
|
||
current_directory, dirbuf);
|
||
else
|
||
printf_unfiltered ("Working directory %s.\n", current_directory);
|
||
}
|
||
|
||
static void
|
||
cd_command (dir, from_tty)
|
||
char *dir;
|
||
int from_tty;
|
||
{
|
||
int len;
|
||
/* Found something other than leading repetitions of "/..". */
|
||
int found_real_path;
|
||
char *p;
|
||
|
||
/* 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);
|
||
|
||
if (chdir (dir) < 0)
|
||
perror_with_name (dir);
|
||
|
||
len = strlen (dir);
|
||
dir = savestring (dir, len - (len > 1 && dir[len-1] == '/'));
|
||
if (dir[0] == '/')
|
||
current_directory = dir;
|
||
else
|
||
{
|
||
if (current_directory[0] == '/' && current_directory[1] == '\0')
|
||
current_directory = concat (current_directory, dir, NULL);
|
||
else
|
||
current_directory = concat (current_directory, "/", dir, NULL);
|
||
free (dir);
|
||
}
|
||
|
||
/* Now simplify any occurrences of `.' and `..' in the pathname. */
|
||
|
||
found_real_path = 0;
|
||
for (p = current_directory; *p;)
|
||
{
|
||
if (p[0] == '/' && p[1] == '.' && (p[2] == 0 || p[2] == '/'))
|
||
strcpy (p, p + 2);
|
||
else if (p[0] == '/' && p[1] == '.' && p[2] == '.'
|
||
&& (p[3] == 0 || p[3] == '/'))
|
||
{
|
||
if (found_real_path)
|
||
{
|
||
/* Search backwards for the directory just before the "/.."
|
||
and obliterate it and the "/..". */
|
||
char *q = p;
|
||
while (q != current_directory && q[-1] != '/')
|
||
--q;
|
||
|
||
if (q == current_directory)
|
||
/* current_directory is
|
||
a relative pathname ("can't happen"--leave it alone). */
|
||
++p;
|
||
else
|
||
{
|
||
strcpy (q - 1, p + 3);
|
||
p = q - 1;
|
||
}
|
||
}
|
||
else
|
||
/* We are dealing with leading repetitions of "/..", for example
|
||
"/../..", which is the Mach super-root. */
|
||
p += 3;
|
||
}
|
||
else
|
||
{
|
||
found_real_path = 1;
|
||
++p;
|
||
}
|
||
}
|
||
|
||
forget_cached_source_info ();
|
||
|
||
if (from_tty)
|
||
pwd_command ((char *) 0, 1);
|
||
}
|
||
|
||
struct source_cleanup_lines_args {
|
||
int old_line;
|
||
char *old_file;
|
||
char *old_pre_error;
|
||
char *old_error_pre_print;
|
||
};
|
||
|
||
static void
|
||
source_cleanup_lines (args)
|
||
PTR args;
|
||
{
|
||
struct source_cleanup_lines_args *p =
|
||
(struct source_cleanup_lines_args *)args;
|
||
source_line_number = p->old_line;
|
||
source_file_name = p->old_file;
|
||
source_pre_error = p->old_pre_error;
|
||
error_pre_print = p->old_error_pre_print;
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
source_command (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
FILE *stream;
|
||
struct cleanup *old_cleanups;
|
||
char *file = args;
|
||
struct source_cleanup_lines_args old_lines;
|
||
int needed_length;
|
||
|
||
if (file == NULL)
|
||
{
|
||
error ("source command requires pathname of file to source.");
|
||
}
|
||
|
||
file = tilde_expand (file);
|
||
old_cleanups = make_cleanup (free, file);
|
||
|
||
stream = fopen (file, FOPEN_RT);
|
||
if (stream == 0)
|
||
perror_with_name (file);
|
||
|
||
make_cleanup (fclose, stream);
|
||
|
||
old_lines.old_line = source_line_number;
|
||
old_lines.old_file = source_file_name;
|
||
old_lines.old_pre_error = source_pre_error;
|
||
old_lines.old_error_pre_print = error_pre_print;
|
||
make_cleanup (source_cleanup_lines, &old_lines);
|
||
source_line_number = 0;
|
||
source_file_name = file;
|
||
source_pre_error = error_pre_print == NULL ? "" : error_pre_print;
|
||
source_pre_error = savestring (source_pre_error, strlen (source_pre_error));
|
||
make_cleanup (free, source_pre_error);
|
||
/* This will get set every time we read a line. So it won't stay "" for
|
||
long. */
|
||
error_pre_print = "";
|
||
|
||
needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80;
|
||
if (source_error_allocated < needed_length)
|
||
{
|
||
source_error_allocated *= 2;
|
||
if (source_error_allocated < needed_length)
|
||
source_error_allocated = needed_length;
|
||
if (source_error == NULL)
|
||
source_error = xmalloc (source_error_allocated);
|
||
else
|
||
source_error = xrealloc (source_error, source_error_allocated);
|
||
}
|
||
|
||
read_command_file (stream);
|
||
|
||
do_cleanups (old_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++) != '\0')
|
||
{
|
||
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)
|
||
printf_filtered ("%c", c);
|
||
}
|
||
else
|
||
printf_filtered ("%c", c);
|
||
}
|
||
|
||
/* Force this output to appear now. */
|
||
wrap_here ("");
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
|
||
/* 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;
|
||
|
||
extern struct _hist_entry *history_get PARAMS ((int));
|
||
extern int history_base;
|
||
|
||
/* 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;
|
||
}
|
||
/* "show commands" 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;
|
||
}
|
||
|
||
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
|
||
"show commands +" does. This is unnecessary if arg is null,
|
||
because "show commands +" is not useful after "show commands". */
|
||
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 == INT_MAX)
|
||
unstifle_history ();
|
||
else if (history_size >= 0)
|
||
stifle_history (history_size);
|
||
else
|
||
{
|
||
history_size = INT_MAX;
|
||
error ("History size must be non-negative");
|
||
}
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
set_history (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
|
||
help_list (sethistlist, "set history ", -1, gdb_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 (signo)
|
||
int signo;
|
||
{
|
||
/* This message is based on ANSI C, section 4.7. Note that integer
|
||
divide by zero causes this, so "float" is a misnomer. */
|
||
signal (SIGFPE, float_handler);
|
||
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
|
||
init_cmd_lists ()
|
||
{
|
||
cmdlist = NULL;
|
||
infolist = NULL;
|
||
enablelist = NULL;
|
||
disablelist = NULL;
|
||
deletelist = NULL;
|
||
enablebreaklist = NULL;
|
||
setlist = NULL;
|
||
unsetlist = NULL;
|
||
showlist = NULL;
|
||
sethistlist = NULL;
|
||
showhistlist = NULL;
|
||
unsethistlist = NULL;
|
||
#if MAINTENANCE_CMDS
|
||
maintenancelist = NULL;
|
||
maintenanceinfolist = NULL;
|
||
maintenanceprintlist = NULL;
|
||
#endif
|
||
setprintlist = NULL;
|
||
showprintlist = NULL;
|
||
setchecklist = NULL;
|
||
showchecklist = NULL;
|
||
}
|
||
|
||
/* Init the history buffer. Note that we are called after the init file(s)
|
||
* have been read so that the user can change the history file via his
|
||
* .gdbinit file (for instance). The GDBHISTFILE environment variable
|
||
* overrides all of this.
|
||
*/
|
||
|
||
static void
|
||
init_history()
|
||
{
|
||
char *tmpenv;
|
||
|
||
tmpenv = getenv ("HISTSIZE");
|
||
if (tmpenv)
|
||
history_size = atoi (tmpenv);
|
||
else if (!history_size)
|
||
history_size = 256;
|
||
|
||
stifle_history (history_size);
|
||
|
||
tmpenv = getenv ("GDBHISTFILE");
|
||
if (tmpenv)
|
||
history_filename = savestring (tmpenv, strlen(tmpenv));
|
||
else if (!history_filename) {
|
||
/* 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", NULL);
|
||
}
|
||
read_history (history_filename);
|
||
}
|
||
|
||
static void
|
||
init_main ()
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
#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;
|
||
|
||
/* 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_completer_quote_characters = gdb_completer_quote_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 ("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);
|
||
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.");
|
||
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_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__
|
||
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_show_from_set
|
||
(add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p,
|
||
"Set editing of command lines as they are typed.\n\
|
||
Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
|
||
Without an argument, command line editing is enabled. To edit, use\n\
|
||
EMACS-like or VI-like commands like control-P or ESC.", &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_integer, (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.sfunc = 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 showing things about the program being debugged.",
|
||
&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 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 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);
|
||
|
||
/* 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);
|
||
|
||
add_show_from_set (
|
||
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),
|
||
&showlist);
|
||
}
|