1705 lines
49 KiB
C
1705 lines
49 KiB
C
/* Top level stuff for GDB, the GNU debugger.
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
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2008 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 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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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 "cli/cli-cmds.h"
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#include "cli/cli-script.h"
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#include "cli/cli-setshow.h"
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#include "cli/cli-decode.h"
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#include "symtab.h"
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#include "inferior.h"
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#include "exceptions.h"
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#include <signal.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 "value.h"
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#include "language.h"
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#include "terminal.h" /* For job_control. */
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#include "annotate.h"
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#include "completer.h"
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#include "top.h"
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#include "version.h"
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#include "serial.h"
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#include "doublest.h"
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#include "gdb_assert.h"
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#include "main.h"
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#include "event-loop.h"
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/* readline include files */
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#include "readline/readline.h"
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#include "readline/history.h"
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/* readline defines this. */
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#undef savestring
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#include <sys/types.h>
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#include "event-top.h"
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#include "gdb_string.h"
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#include "gdb_stat.h"
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#include <ctype.h>
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#include "ui-out.h"
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#include "cli-out.h"
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/* Default command line prompt. This is overriden in some configs. */
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#ifndef DEFAULT_PROMPT
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#define DEFAULT_PROMPT "(gdb) "
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#endif
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/* Initialization file name for gdb. This is overridden in some configs. */
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#ifndef PATH_MAX
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# ifdef FILENAME_MAX
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# define PATH_MAX FILENAME_MAX
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# else
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# define PATH_MAX 512
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# endif
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#endif
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#ifndef GDBINIT_FILENAME
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#define GDBINIT_FILENAME ".gdbinit"
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#endif
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char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME;
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int inhibit_gdbinit = 0;
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/* If nonzero, and GDB has been configured to be able to use windows,
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attempt to open them upon startup. */
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int use_windows = 0;
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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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static void
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show_caution (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("\
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Whether to confirm potentially dangerous operations is %s.\n"),
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value);
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}
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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 or interacting via a GUI. */
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FILE *instream;
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/* Flag to indicate whether a user defined command is currently running. */
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int in_user_command;
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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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char gdb_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) (FILE *, char *);
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int epoch_interface;
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int xgdb_verbose;
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/* gdb prints this when reading a command interactively */
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static char *gdb_prompt_string; /* the global prompt string */
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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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/* Nonzero if the current command is modified by "server ". This
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affects things like recording into the command history, commands
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repeating on RETURN, etc. This is so a user interface (emacs, GUI,
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whatever) can issue its own commands and also send along commands
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from the user, and have the user not notice that the user interface
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is issuing commands too. */
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int server_command;
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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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/* FIXME: This means that "show remotebaud" and gr_files_info can print -1
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or (unsigned int)-1. This is a Bad User Interface. */
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int baud_rate = -1;
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/* Timeout limit for response from target. */
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/* The default value has been changed many times over the years. It
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was originally 5 seconds. But that was thought to be a long time
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to sit and wait, so it was changed to 2 seconds. That was thought
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to be plenty unless the connection was going through some terminal
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server or multiplexer or other form of hairy serial connection.
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In mid-1996, remote_timeout was moved from remote.c to top.c and
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it began being used in other remote-* targets. It appears that the
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default was changed to 20 seconds at that time, perhaps because the
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Renesas E7000 ICE didn't always respond in a timely manner.
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But if 5 seconds is a long time to sit and wait for retransmissions,
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20 seconds is far worse. This demonstrates the difficulty of using
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a single variable for all protocol timeouts.
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As remote.c is used much more than remote-e7000.c, it was changed
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back to 2 seconds in 1999. */
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int remote_timeout = 2;
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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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/* Non-zero means the target is running. Note: this is different from
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saying that there is an active target and we are stopped at a
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breakpoint, for instance. This is a real indicator whether the
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target is off and running, which gdb is doing something else. */
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int target_executing = 0;
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/* Sbrk location on entry to main. Used for statistics only. */
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#ifdef HAVE_SBRK
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char *lim_at_start;
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#endif
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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 (int);
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#endif
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#endif
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/* Hooks for alternate command interfaces. */
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/* Called after most modules have been initialized, but before taking users
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command file.
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If the UI fails to initialize and it wants GDB to continue
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using the default UI, then it should clear this hook before returning. */
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void (*deprecated_init_ui_hook) (char *argv0);
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/* This hook is called from within gdb's many mini-event loops which could
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steal control from a real user interface's event loop. It returns
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non-zero if the user is requesting a detach, zero otherwise. */
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int (*deprecated_ui_loop_hook) (int);
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/* Called instead of command_loop at top level. Can be invoked via
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throw_exception(). */
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void (*deprecated_command_loop_hook) (void);
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/* Called from print_frame_info to list the line we stopped in. */
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void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, int line,
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int stopline, int noerror);
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/* Replaces most of query. */
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int (*deprecated_query_hook) (const char *, va_list);
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/* Replaces most of warning. */
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void (*deprecated_warning_hook) (const char *, va_list);
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/* These three functions support getting lines of text from the user.
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They are used in sequence. First deprecated_readline_begin_hook is
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called with a text string that might be (for example) a message for
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the user to type in a sequence of commands to be executed at a
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breakpoint. If this function calls back to a GUI, it might take
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this opportunity to pop up a text interaction window with this
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message. Next, deprecated_readline_hook is called with a prompt
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that is emitted prior to collecting the user input. It can be
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called multiple times. Finally, deprecated_readline_end_hook is
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called to notify the GUI that we are done with the interaction
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window and it can close it. */
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void (*deprecated_readline_begin_hook) (char *, ...);
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char *(*deprecated_readline_hook) (char *);
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void (*deprecated_readline_end_hook) (void);
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/* Called as appropriate to notify the interface of the specified breakpoint
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conditions. */
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void (*deprecated_create_breakpoint_hook) (struct breakpoint * bpt);
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void (*deprecated_delete_breakpoint_hook) (struct breakpoint * bpt);
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void (*deprecated_modify_breakpoint_hook) (struct breakpoint * bpt);
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/* Called as appropriate to notify the interface that we have attached
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to or detached from an already running process. */
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void (*deprecated_attach_hook) (void);
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void (*deprecated_detach_hook) (void);
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/* Called during long calculations to allow GUI to repair window damage, and to
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check for stop buttons, etc... */
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void (*deprecated_interactive_hook) (void);
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/* Tell the GUI someone changed the register REGNO. -1 means
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that the caller does not know which register changed or
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that several registers have changed (see value_assign). */
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void (*deprecated_register_changed_hook) (int regno);
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/* Tell the GUI someone changed LEN bytes of memory at ADDR */
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void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
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/* Called when going to wait for the target. Usually allows the GUI to run
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while waiting for target events. */
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ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
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struct target_waitstatus * status);
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/* Used by UI as a wrapper around command execution. May do various things
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like enabling/disabling buttons, etc... */
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void (*deprecated_call_command_hook) (struct cmd_list_element * c, char *cmd,
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int from_tty);
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/* Called after a `set' command has finished. Is only run if the
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`set' command succeeded. */
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void (*deprecated_set_hook) (struct cmd_list_element * c);
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/* Called when the current thread changes. Argument is thread id. */
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void (*deprecated_context_hook) (int id);
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/* Takes control from error (). Typically used to prevent longjmps out of the
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middle of the GUI. Usually used in conjunction with a catch routine. */
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void (*deprecated_error_hook) (void);
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/* Handler for SIGHUP. */
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#ifdef SIGHUP
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/* NOTE 1999-04-29: This function will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c */
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/* static */ int
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quit_cover (void *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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#endif /* defined SIGHUP */
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/* Line number we are currently in in a file which is being sourced. */
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/* NOTE 1999-04-29: This variable will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c */
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/* static */ int source_line_number;
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/* Name of the file we are sourcing. */
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/* NOTE 1999-04-29: This variable will be static again, once we modify
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gdb to use the event loop as the default command loop and we merge
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event-top.c into this file, top.c */
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/* static */ char *source_file_name;
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/* Clean up on error during a "source" command (or execution of a
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user-defined command). */
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void
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do_restore_instream_cleanup (void *stream)
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{
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/* Restore the previous input stream. */
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instream = stream;
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}
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/* Read commands from STREAM. */
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void
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read_command_file (FILE *stream)
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{
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struct cleanup *cleanups;
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cleanups = make_cleanup (do_restore_instream_cleanup, instream);
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instream = stream;
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command_loop ();
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do_cleanups (cleanups);
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}
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void (*pre_init_ui_hook) (void);
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#ifdef __MSDOS__
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void
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do_chdir_cleanup (void *old_dir)
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{
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chdir (old_dir);
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xfree (old_dir);
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}
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#endif
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/* Do any commands attached to breakpoint we stopped at. Only if we
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are always running synchronously. Or if we have just executed a
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command that doesn't start the target. */
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static void
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command_line_handler_continuation (struct continuation_arg *arg)
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{
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extern int display_time;
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extern int display_space;
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long time_at_cmd_start = arg->data.longint;
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long space_at_cmd_start = arg->next->data.longint;
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bpstat_do_actions (&stop_bpstat);
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if (display_time)
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{
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long cmd_time = get_run_time () - time_at_cmd_start;
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printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
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cmd_time / 1000000, cmd_time % 1000000);
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}
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if (display_space)
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{
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#ifdef HAVE_SBRK
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char *lim = (char *) sbrk (0);
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long space_now = lim - lim_at_start;
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long space_diff = space_now - space_at_cmd_start;
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printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"),
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space_now,
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(space_diff >= 0 ? '+' : '-'),
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space_diff);
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#endif
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}
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}
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/* Execute the line P as a command.
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Pass FROM_TTY as second argument to the defining function. */
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void
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execute_command (char *p, int from_tty)
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{
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struct cmd_list_element *c;
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enum language flang;
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static int warned = 0;
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char *line;
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struct continuation_arg *arg1;
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struct continuation_arg *arg2;
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long time_at_cmd_start = 0;
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#ifdef HAVE_SBRK
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long space_at_cmd_start = 0;
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#endif
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extern int display_time;
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extern int display_space;
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if (target_can_async_p ())
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{
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time_at_cmd_start = get_run_time ();
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if (display_space)
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{
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#ifdef HAVE_SBRK
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char *lim = (char *) sbrk (0);
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space_at_cmd_start = lim - lim_at_start;
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||
#endif
|
||
}
|
||
}
|
||
|
||
free_all_values ();
|
||
|
||
/* Force cleanup of any alloca areas if using C alloca instead of
|
||
a builtin alloca. */
|
||
alloca (0);
|
||
|
||
/* This can happen when command_line_input hits end of file. */
|
||
if (p == NULL)
|
||
return;
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||
|
||
target_log_command (p);
|
||
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
if (*p)
|
||
{
|
||
char *arg;
|
||
line = p;
|
||
|
||
/* If trace-commands is set then this will print this command. */
|
||
print_command_trace (p);
|
||
|
||
c = lookup_cmd (&p, cmdlist, "", 0, 1);
|
||
|
||
/* If the target is running, we allow only a limited set of
|
||
commands. */
|
||
if (target_can_async_p () && target_executing)
|
||
if (strcmp (c->name, "help") != 0
|
||
&& strcmp (c->name, "pwd") != 0
|
||
&& strcmp (c->name, "show") != 0
|
||
&& strcmp (c->name, "info") != 0
|
||
&& strcmp (c->name, "interrupt") != 0)
|
||
error (_("Cannot execute this command while the target is running."));
|
||
|
||
/* Pass null arg rather than an empty one. */
|
||
arg = *p ? p : 0;
|
||
|
||
/* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
|
||
while the is_complete_command(cfunc) test is just plain
|
||
bogus. They should both be replaced by a test of the form
|
||
c->strip_trailing_white_space_p. */
|
||
/* NOTE: cagney/2002-02-02: The function.cfunc in the below
|
||
can't be replaced with func. This is because it is the
|
||
cfunc, and not the func, that has the value that the
|
||
is_complete_command hack is testing for. */
|
||
/* Clear off trailing whitespace, except for set and complete
|
||
command. */
|
||
if (arg
|
||
&& c->type != set_cmd
|
||
&& !is_complete_command (c))
|
||
{
|
||
p = arg + strlen (arg) - 1;
|
||
while (p >= arg && (*p == ' ' || *p == '\t'))
|
||
p--;
|
||
*(p + 1) = '\0';
|
||
}
|
||
|
||
/* If this command has been pre-hooked, run the hook first. */
|
||
execute_cmd_pre_hook (c);
|
||
|
||
if (c->flags & DEPRECATED_WARN_USER)
|
||
deprecated_cmd_warning (&line);
|
||
|
||
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 (!cmd_func_p (c))
|
||
error (_("That is not a command, just a help topic."));
|
||
else if (deprecated_call_command_hook)
|
||
deprecated_call_command_hook (c, arg, from_tty & caution);
|
||
else
|
||
cmd_func (c, arg, from_tty & caution);
|
||
|
||
/* If this command has been post-hooked, run the hook last. */
|
||
execute_cmd_post_hook (c);
|
||
|
||
}
|
||
|
||
/* 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_executing && 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;
|
||
}
|
||
}
|
||
|
||
/* Set things up for this function to be compete later, once the
|
||
execution has completed, if we are doing an execution command,
|
||
otherwise, just go ahead and finish. */
|
||
if (target_can_async_p () && target_executing)
|
||
{
|
||
arg1 =
|
||
(struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
|
||
arg2 =
|
||
(struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
|
||
arg1->next = arg2;
|
||
arg2->next = NULL;
|
||
arg1->data.longint = time_at_cmd_start;
|
||
#ifdef HAVE_SBRK
|
||
arg2->data.longint = space_at_cmd_start;
|
||
#endif
|
||
add_continuation (command_line_handler_continuation, arg1);
|
||
}
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them
|
||
until end of file or error reading instream. */
|
||
|
||
void
|
||
command_loop (void)
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *command;
|
||
int stdin_is_tty = ISATTY (stdin);
|
||
long time_at_cmd_start;
|
||
#ifdef HAVE_SBRK
|
||
long space_at_cmd_start = 0;
|
||
#endif
|
||
extern int display_time;
|
||
extern int display_space;
|
||
|
||
while (instream && !feof (instream))
|
||
{
|
||
if (window_hook && instream == stdin)
|
||
(*window_hook) (instream, get_prompt ());
|
||
|
||
quit_flag = 0;
|
||
if (instream == stdin && stdin_is_tty)
|
||
reinitialize_more_filter ();
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Get a command-line. This calls the readline package. */
|
||
command = command_line_input (instream == stdin ?
|
||
get_prompt () : (char *) NULL,
|
||
instream == stdin, "prompt");
|
||
if (command == 0)
|
||
return;
|
||
|
||
time_at_cmd_start = get_run_time ();
|
||
|
||
if (display_space)
|
||
{
|
||
#ifdef HAVE_SBRK
|
||
char *lim = (char *) sbrk (0);
|
||
space_at_cmd_start = lim - lim_at_start;
|
||
#endif
|
||
}
|
||
|
||
execute_command (command, instream == stdin);
|
||
/* Do any commands attached to breakpoint we stopped at. */
|
||
bpstat_do_actions (&stop_bpstat);
|
||
do_cleanups (old_chain);
|
||
|
||
if (display_time)
|
||
{
|
||
long cmd_time = get_run_time () - time_at_cmd_start;
|
||
|
||
printf_unfiltered (_("Command execution time: %ld.%06ld\n"),
|
||
cmd_time / 1000000, cmd_time % 1000000);
|
||
}
|
||
|
||
if (display_space)
|
||
{
|
||
#ifdef HAVE_SBRK
|
||
char *lim = (char *) sbrk (0);
|
||
long space_now = lim - lim_at_start;
|
||
long space_diff = space_now - space_at_cmd_start;
|
||
|
||
printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"),
|
||
space_now,
|
||
(space_diff >= 0 ? "+" : ""),
|
||
space_diff);
|
||
#endif
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Commands call this if they do not want to be repeated by null lines. */
|
||
|
||
void
|
||
dont_repeat (void)
|
||
{
|
||
if (server_command)
|
||
return;
|
||
|
||
/* 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 PROMPT_ARG 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 (char *prompt_arg)
|
||
{
|
||
int c;
|
||
char *result;
|
||
int input_index = 0;
|
||
int result_size = 80;
|
||
|
||
if (prompt_arg)
|
||
{
|
||
/* 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 (prompt_arg, 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;
|
||
xfree (result);
|
||
return NULL;
|
||
}
|
||
|
||
if (c == '\n')
|
||
{
|
||
if (input_index > 0 && result[input_index - 1] == '\r')
|
||
input_index--;
|
||
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;
|
||
|
||
/* NOTE 1999-04-29: This variable will be static again, once we modify
|
||
gdb to use the event loop as the default command loop and we merge
|
||
event-top.c into this file, top.c */
|
||
|
||
/* static */ int history_expansion_p;
|
||
|
||
static int write_history_p;
|
||
static void
|
||
show_write_history_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
static int history_size;
|
||
static void
|
||
show_history_size (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("The size of the command history is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
static char *history_filename;
|
||
static void
|
||
show_history_filename (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("\
|
||
The filename in which to record the command history is \"%s\".\n"),
|
||
value);
|
||
}
|
||
|
||
/* This is like readline(), but it has some gdb-specific behavior.
|
||
gdb may want readline in both the synchronous and async modes during
|
||
a single gdb invocation. At the ordinary top-level prompt we might
|
||
be using the async readline. That means we can't use
|
||
rl_pre_input_hook, since it doesn't work properly in async mode.
|
||
However, for a secondary prompt (" >", such as occurs during a
|
||
`define'), gdb wants a synchronous response.
|
||
|
||
We used to call readline() directly, running it in synchronous
|
||
mode. But mixing modes this way is not supported, and as of
|
||
readline 5.x it no longer works; the arrow keys come unbound during
|
||
the synchronous call. So we make a nested call into the event
|
||
loop. That's what gdb_readline_wrapper is for. */
|
||
|
||
/* A flag set as soon as gdb_readline_wrapper_line is called; we can't
|
||
rely on gdb_readline_wrapper_result, which might still be NULL if
|
||
the user types Control-D for EOF. */
|
||
static int gdb_readline_wrapper_done;
|
||
|
||
/* The result of the current call to gdb_readline_wrapper, once a newline
|
||
is seen. */
|
||
static char *gdb_readline_wrapper_result;
|
||
|
||
/* Any intercepted hook. Operate-and-get-next sets this, expecting it
|
||
to be called after the newline is processed (which will redisplay
|
||
the prompt). But in gdb_readline_wrapper we will not get a new
|
||
prompt until the next call, or until we return to the event loop.
|
||
So we disable this hook around the newline and restore it before we
|
||
return. */
|
||
static void (*saved_after_char_processing_hook) (void);
|
||
|
||
/* This function is called when readline has seen a complete line of
|
||
text. */
|
||
|
||
static void
|
||
gdb_readline_wrapper_line (char *line)
|
||
{
|
||
gdb_assert (!gdb_readline_wrapper_done);
|
||
gdb_readline_wrapper_result = line;
|
||
gdb_readline_wrapper_done = 1;
|
||
|
||
/* Prevent operate-and-get-next from acting too early. */
|
||
saved_after_char_processing_hook = after_char_processing_hook;
|
||
after_char_processing_hook = NULL;
|
||
|
||
/* Prevent parts of the prompt from being redisplayed if annotations
|
||
are enabled, and readline's state getting out of sync. */
|
||
if (async_command_editing_p)
|
||
rl_callback_handler_remove ();
|
||
}
|
||
|
||
struct gdb_readline_wrapper_cleanup
|
||
{
|
||
void (*handler_orig) (char *);
|
||
int already_prompted_orig;
|
||
};
|
||
|
||
static void
|
||
gdb_readline_wrapper_cleanup (void *arg)
|
||
{
|
||
struct gdb_readline_wrapper_cleanup *cleanup = arg;
|
||
|
||
rl_already_prompted = cleanup->already_prompted_orig;
|
||
|
||
gdb_assert (input_handler == gdb_readline_wrapper_line);
|
||
input_handler = cleanup->handler_orig;
|
||
gdb_readline_wrapper_result = NULL;
|
||
gdb_readline_wrapper_done = 0;
|
||
|
||
after_char_processing_hook = saved_after_char_processing_hook;
|
||
saved_after_char_processing_hook = NULL;
|
||
|
||
xfree (cleanup);
|
||
}
|
||
|
||
char *
|
||
gdb_readline_wrapper (char *prompt)
|
||
{
|
||
struct cleanup *back_to;
|
||
struct gdb_readline_wrapper_cleanup *cleanup;
|
||
char *retval;
|
||
|
||
cleanup = xmalloc (sizeof (*cleanup));
|
||
cleanup->handler_orig = input_handler;
|
||
input_handler = gdb_readline_wrapper_line;
|
||
|
||
cleanup->already_prompted_orig = rl_already_prompted;
|
||
|
||
back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
|
||
|
||
/* Display our prompt and prevent double prompt display. */
|
||
display_gdb_prompt (prompt);
|
||
rl_already_prompted = 1;
|
||
|
||
if (after_char_processing_hook)
|
||
(*after_char_processing_hook) ();
|
||
gdb_assert (after_char_processing_hook == NULL);
|
||
|
||
/* gdb_do_one_event argument is unused. */
|
||
while (gdb_do_one_event (NULL) >= 0)
|
||
if (gdb_readline_wrapper_done)
|
||
break;
|
||
|
||
retval = gdb_readline_wrapper_result;
|
||
do_cleanups (back_to);
|
||
return retval;
|
||
}
|
||
|
||
|
||
#ifdef STOP_SIGNAL
|
||
static void
|
||
stop_sig (int signo)
|
||
{
|
||
#if STOP_SIGNAL == SIGTSTP
|
||
signal (SIGTSTP, SIG_DFL);
|
||
#if HAVE_SIGPROCMASK
|
||
{
|
||
sigset_t zero;
|
||
|
||
sigemptyset (&zero);
|
||
sigprocmask (SIG_SETMASK, &zero, 0);
|
||
}
|
||
#elif HAVE_SIGSETMASK
|
||
sigsetmask (0);
|
||
#endif
|
||
kill (getpid (), SIGTSTP);
|
||
signal (SIGTSTP, stop_sig);
|
||
#else
|
||
signal (STOP_SIGNAL, stop_sig);
|
||
#endif
|
||
printf_unfiltered ("%s", get_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
|
||
float_handler (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."));
|
||
}
|
||
|
||
static void
|
||
do_nothing (int signo)
|
||
{
|
||
/* Under System V the default disposition of a signal is reinstated after
|
||
the signal is caught and delivered to an application process. On such
|
||
systems one must restore the replacement signal handler if one wishes
|
||
to continue handling the signal in one's program. On BSD systems this
|
||
is not needed but it is harmless, and it simplifies the code to just do
|
||
it unconditionally. */
|
||
signal (signo, do_nothing);
|
||
}
|
||
|
||
/* The current saved history number from operate-and-get-next.
|
||
This is -1 if not valid. */
|
||
static int operate_saved_history = -1;
|
||
|
||
/* This is put on the appropriate hook and helps operate-and-get-next
|
||
do its work. */
|
||
static void
|
||
gdb_rl_operate_and_get_next_completion (void)
|
||
{
|
||
int delta = where_history () - operate_saved_history;
|
||
/* The `key' argument to rl_get_previous_history is ignored. */
|
||
rl_get_previous_history (delta, 0);
|
||
operate_saved_history = -1;
|
||
|
||
/* readline doesn't automatically update the display for us. */
|
||
rl_redisplay ();
|
||
|
||
after_char_processing_hook = NULL;
|
||
rl_pre_input_hook = NULL;
|
||
}
|
||
|
||
/* This is a gdb-local readline command handler. It accepts the
|
||
current command line (like RET does) and, if this command was taken
|
||
from the history, arranges for the next command in the history to
|
||
appear on the command line when the prompt returns.
|
||
We ignore the arguments. */
|
||
static int
|
||
gdb_rl_operate_and_get_next (int count, int key)
|
||
{
|
||
int where;
|
||
|
||
/* Use the async hook. */
|
||
after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
|
||
|
||
/* Find the current line, and find the next line to use. */
|
||
where = where_history();
|
||
|
||
/* FIXME: kettenis/20020817: max_input_history is renamed into
|
||
history_max_entries in readline-4.2. When we do a new readline
|
||
import, we should probably change it here too, even though
|
||
readline maintains backwards compatibility for now by still
|
||
defining max_input_history. */
|
||
if ((history_is_stifled () && (history_length >= max_input_history)) ||
|
||
(where >= history_length - 1))
|
||
operate_saved_history = where;
|
||
else
|
||
operate_saved_history = where + 1;
|
||
|
||
return rl_newline (1, key);
|
||
}
|
||
|
||
/* 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 (char *prompt_arg, int repeat, char *annotation_suffix)
|
||
{
|
||
static char *linebuffer = 0;
|
||
static unsigned linelength = 0;
|
||
char *p;
|
||
char *p1;
|
||
char *rl;
|
||
char *local_prompt = prompt_arg;
|
||
char *nline;
|
||
char got_eof = 0;
|
||
|
||
/* The annotation suffix must be non-NULL. */
|
||
if (annotation_suffix == NULL)
|
||
annotation_suffix = "";
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg))
|
||
+ strlen (annotation_suffix) + 40);
|
||
if (prompt_arg == NULL)
|
||
local_prompt[0] = '\0';
|
||
else
|
||
strcpy (local_prompt, prompt_arg);
|
||
strcat (local_prompt, "\n\032\032");
|
||
strcat (local_prompt, annotation_suffix);
|
||
strcat (local_prompt, "\n");
|
||
}
|
||
|
||
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, handle_stop_sig);
|
||
#endif
|
||
|
||
while (1)
|
||
{
|
||
/* Make sure that all output has been output. Some machines may let
|
||
you get away with leaving out some of the gdb_flush, but not all. */
|
||
wrap_here ("");
|
||
gdb_flush (gdb_stdout);
|
||
gdb_flush (gdb_stderr);
|
||
|
||
if (source_file_name != NULL)
|
||
++source_line_number;
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
puts_unfiltered ("\n\032\032pre-");
|
||
puts_unfiltered (annotation_suffix);
|
||
puts_unfiltered ("\n");
|
||
}
|
||
|
||
/* Don't use fancy stuff if not talking to stdin. */
|
||
if (deprecated_readline_hook && input_from_terminal_p ())
|
||
{
|
||
rl = (*deprecated_readline_hook) (local_prompt);
|
||
}
|
||
else if (command_editing_p && input_from_terminal_p ())
|
||
{
|
||
rl = gdb_readline_wrapper (local_prompt);
|
||
}
|
||
else
|
||
{
|
||
rl = gdb_readline (local_prompt);
|
||
}
|
||
|
||
if (annotation_level > 1 && instream == stdin)
|
||
{
|
||
puts_unfiltered ("\n\032\032post-");
|
||
puts_unfiltered (annotation_suffix);
|
||
puts_unfiltered ("\n");
|
||
}
|
||
|
||
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++;
|
||
|
||
xfree (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;
|
||
|
||
#define SERVER_COMMAND_LENGTH 7
|
||
server_command =
|
||
(p - linebuffer > SERVER_COMMAND_LENGTH)
|
||
&& strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
|
||
if (server_command)
|
||
{
|
||
/* Note that we don't set `line'. Between this and the check in
|
||
dont_repeat, this insures that repeating will still do the
|
||
right thing. */
|
||
*p = '\0';
|
||
return linebuffer + SERVER_COMMAND_LENGTH;
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
xfree (history_value);
|
||
return command_line_input (prompt_arg, repeat, annotation_suffix);
|
||
}
|
||
if (strlen (history_value) > linelength)
|
||
{
|
||
linelength = strlen (history_value) + 1;
|
||
linebuffer = (char *) xrealloc (linebuffer, linelength);
|
||
}
|
||
strcpy (linebuffer, history_value);
|
||
p = linebuffer + strlen (linebuffer);
|
||
}
|
||
xfree (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 && p == linebuffer)
|
||
return line;
|
||
for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
|
||
if (repeat && !*p1)
|
||
return line;
|
||
|
||
*p = 0;
|
||
|
||
/* Add line to history if appropriate. */
|
||
if (instream == stdin
|
||
&& ISATTY (stdin) && *linebuffer)
|
||
add_history (linebuffer);
|
||
|
||
/* Note: lines consisting solely 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. */
|
||
if (*p1 == '#')
|
||
*p1 = '\0'; /* Found a comment. */
|
||
|
||
/* Save into global buffer if appropriate. */
|
||
if (repeat)
|
||
{
|
||
if (linelength > linesize)
|
||
{
|
||
line = xrealloc (line, linelength);
|
||
linesize = linelength;
|
||
}
|
||
strcpy (line, linebuffer);
|
||
return line;
|
||
}
|
||
|
||
return linebuffer;
|
||
}
|
||
|
||
/* Print the GDB banner. */
|
||
void
|
||
print_gdb_version (struct ui_file *stream)
|
||
{
|
||
/* From GNU coding standards, first line is meant to be easy for a
|
||
program to parse, and is just canonical program name and version
|
||
number, which starts after last space. */
|
||
|
||
fprintf_filtered (stream, "GNU gdb %s\n", version);
|
||
|
||
/* Second line is a copyright notice. */
|
||
|
||
fprintf_filtered (stream, "Copyright (C) 2008 Free Software Foundation, Inc.\n");
|
||
|
||
/* Following the copyright is a brief statement that the program is
|
||
free software, that users are free to copy and change it on
|
||
certain conditions, that it is covered by the GNU GPL, and that
|
||
there is no warranty. */
|
||
|
||
fprintf_filtered (stream, "\
|
||
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
|
||
This is free software: you are free to change and redistribute it.\n\
|
||
There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\
|
||
and \"show warranty\" for details.\n");
|
||
|
||
/* After the required info we print the configuration information. */
|
||
|
||
fprintf_filtered (stream, "This GDB was configured as \"");
|
||
if (strcmp (host_name, target_name) != 0)
|
||
{
|
||
fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name);
|
||
}
|
||
else
|
||
{
|
||
fprintf_filtered (stream, "%s", host_name);
|
||
}
|
||
fprintf_filtered (stream, "\".");
|
||
}
|
||
|
||
/* get_prompt: access method for the GDB prompt string. */
|
||
|
||
char *
|
||
get_prompt (void)
|
||
{
|
||
return PROMPT (0);
|
||
}
|
||
|
||
void
|
||
set_prompt (char *s)
|
||
{
|
||
/* ??rehrauer: I don't know why this fails, since it looks as though
|
||
assignments to prompt are wrapped in calls to savestring...
|
||
if (prompt != NULL)
|
||
xfree (prompt);
|
||
*/
|
||
PROMPT (0) = savestring (s, strlen (s));
|
||
}
|
||
|
||
|
||
/* If necessary, make the user confirm that we should quit. Return
|
||
non-zero if we should quit, zero if we shouldn't. */
|
||
|
||
int
|
||
quit_confirm (void)
|
||
{
|
||
if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
|
||
{
|
||
char *s;
|
||
|
||
/* This is something of a hack. But there's no reliable way to
|
||
see if a GUI is running. The `use_windows' variable doesn't
|
||
cut it. */
|
||
if (deprecated_init_ui_hook)
|
||
s = "A debugging session is active.\nDo you still want to close the debugger?";
|
||
else if (attach_flag)
|
||
s = "The program is running. Quit anyway (and detach it)? ";
|
||
else
|
||
s = "The program is running. Exit anyway? ";
|
||
|
||
if (!query ("%s", s))
|
||
return 0;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Helper routine for quit_force that requires error handling. */
|
||
|
||
struct qt_args
|
||
{
|
||
char *args;
|
||
int from_tty;
|
||
};
|
||
|
||
static int
|
||
quit_target (void *arg)
|
||
{
|
||
struct qt_args *qt = (struct qt_args *)arg;
|
||
|
||
if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
|
||
{
|
||
if (attach_flag)
|
||
target_detach (qt->args, qt->from_tty);
|
||
else
|
||
target_kill ();
|
||
}
|
||
|
||
/* UDI wants this, to kill the TIP. */
|
||
target_close (¤t_target, 1);
|
||
|
||
/* Save the history information if it is appropriate to do so. */
|
||
if (write_history_p && history_filename)
|
||
write_history (history_filename);
|
||
|
||
do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Quit without asking for confirmation. */
|
||
|
||
void
|
||
quit_force (char *args, int from_tty)
|
||
{
|
||
int exit_code = 0;
|
||
struct qt_args qt;
|
||
|
||
/* An optional expression may be used to cause gdb to terminate with the
|
||
value of that expression. */
|
||
if (args)
|
||
{
|
||
struct value *val = parse_and_eval (args);
|
||
|
||
exit_code = (int) value_as_long (val);
|
||
}
|
||
else if (return_child_result)
|
||
exit_code = return_child_result_value;
|
||
|
||
qt.args = args;
|
||
qt.from_tty = from_tty;
|
||
|
||
/* We want to handle any quit errors and exit regardless. */
|
||
catch_errors (quit_target, &qt,
|
||
"Quitting: ", RETURN_MASK_ALL);
|
||
|
||
exit (exit_code);
|
||
}
|
||
|
||
/* Returns whether GDB is running on a terminal and input is
|
||
currently coming from that terminal. */
|
||
|
||
int
|
||
input_from_terminal_p (void)
|
||
{
|
||
if (gdb_has_a_terminal () && instream == stdin)
|
||
return 1;
|
||
|
||
/* If INSTREAM is unset, and we are not in a user command, we
|
||
must be in Insight. That's like having a terminal, for our
|
||
purposes. */
|
||
if (instream == NULL && !in_user_command)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dont_repeat_command (char *ignored, int from_tty)
|
||
{
|
||
*line = 0; /* Can't call dont_repeat here because we're not
|
||
necessarily reading from stdin. */
|
||
}
|
||
|
||
/* Functions to manipulate command line editing control variables. */
|
||
|
||
/* Number of commands to print in each call to show_commands. */
|
||
#define Hist_print 10
|
||
void
|
||
show_commands (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;
|
||
|
||
/* 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_long (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. */
|
||
static void
|
||
set_history_size_command (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"));
|
||
}
|
||
}
|
||
|
||
void
|
||
set_history (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);
|
||
}
|
||
|
||
void
|
||
show_history (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. */
|
||
void
|
||
set_verbose (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.";
|
||
}
|
||
}
|
||
|
||
/* 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.
|
||
*/
|
||
|
||
void
|
||
init_history (void)
|
||
{
|
||
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. */
|
||
#ifdef __MSDOS__
|
||
/* No leading dots in file names are allowed on MSDOS. */
|
||
history_filename = concat (current_directory, "/_gdb_history",
|
||
(char *)NULL);
|
||
#else
|
||
history_filename = concat (current_directory, "/.gdb_history",
|
||
(char *)NULL);
|
||
#endif
|
||
}
|
||
read_history (history_filename);
|
||
}
|
||
|
||
static void
|
||
show_new_async_prompt (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
|
||
}
|
||
|
||
static void
|
||
show_async_command_editing_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("\
|
||
Editing of command lines as they are typed is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
static void
|
||
show_annotation_level (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
|
||
}
|
||
|
||
static void
|
||
show_exec_done_display_p (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("\
|
||
Notification of completion for asynchronous execution commands is %s.\n"),
|
||
value);
|
||
}
|
||
static void
|
||
init_main (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
/* initialize the prompt stack to a simple "(gdb) " prompt or to
|
||
whatever the DEFAULT_PROMPT is. */
|
||
the_prompts.top = 0;
|
||
PREFIX (0) = "";
|
||
PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT));
|
||
SUFFIX (0) = "";
|
||
/* Set things up for annotation_level > 1, if the user ever decides
|
||
to use it. */
|
||
async_annotation_suffix = "prompt";
|
||
/* Set the variable associated with the setshow prompt command. */
|
||
new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0)));
|
||
|
||
/* If gdb was started with --annotate=2, this is equivalent to the
|
||
user entering the command 'set annotate 2' at the gdb prompt, so
|
||
we need to do extra processing. */
|
||
if (annotation_level > 1)
|
||
set_async_annotation_level (NULL, 0, NULL);
|
||
|
||
/* 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 = readline_line_completion_function;
|
||
rl_completer_word_break_characters = default_word_break_characters ();
|
||
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
|
||
rl_readline_name = "gdb";
|
||
rl_terminal_name = getenv ("TERM");
|
||
|
||
/* The name for this defun comes from Bash, where it originated.
|
||
15 is Control-o, the same binding this function has in Bash. */
|
||
rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
|
||
|
||
add_setshow_string_cmd ("prompt", class_support,
|
||
&new_async_prompt, _("\
|
||
Set gdb's prompt"), _("\
|
||
Show gdb's prompt"), NULL,
|
||
set_async_prompt,
|
||
show_new_async_prompt,
|
||
&setlist, &showlist);
|
||
|
||
add_com ("dont-repeat", class_support, dont_repeat_command, _("\
|
||
Don't repeat this command.\n\
|
||
Primarily used inside of user-defined commands that should not be repeated when\n\
|
||
hitting return."));
|
||
|
||
add_setshow_boolean_cmd ("editing", class_support,
|
||
&async_command_editing_p, _("\
|
||
Set editing of command lines as they are typed."), _("\
|
||
Show editing of command lines as they are typed."), _("\
|
||
Use \"on\" 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."),
|
||
set_async_editing_command,
|
||
show_async_command_editing_p,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
|
||
Set saving of the history record on exit."), _("\
|
||
Show saving of the history record on exit."), _("\
|
||
Use \"on\" to enable the saving, and \"off\" to disable it.\n\
|
||
Without an argument, saving is enabled."),
|
||
NULL,
|
||
show_write_history_p,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_integer_cmd ("size", no_class, &history_size, _("\
|
||
Set the size of the command history,"), _("\
|
||
Show the size of the command history,"), _("\
|
||
ie. the number of previous commands to keep a record of."),
|
||
set_history_size_command,
|
||
show_history_size,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
|
||
Set the filename in which to record the command history"), _("\
|
||
Show the filename in which to record the command history"), _("\
|
||
(the list of previous commands of which a record is kept)."),
|
||
NULL,
|
||
show_history_filename,
|
||
&sethistlist, &showhistlist);
|
||
|
||
add_setshow_boolean_cmd ("confirm", class_support, &caution, _("\
|
||
Set whether to confirm potentially dangerous operations."), _("\
|
||
Show whether to confirm potentially dangerous operations."), NULL,
|
||
NULL,
|
||
show_caution,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
|
||
Set annotation_level."), _("\
|
||
Show annotation_level."), _("\
|
||
0 == normal; 1 == fullname (for use when running under emacs)\n\
|
||
2 == output annotated suitably for use by programs that control GDB."),
|
||
set_async_annotation_level,
|
||
show_annotation_level,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("exec-done-display", class_support,
|
||
&exec_done_display_p, _("\
|
||
Set notification of completion for asynchronous execution commands."), _("\
|
||
Show notification of completion for asynchronous execution commands."), _("\
|
||
Use \"on\" to enable the notification, and \"off\" to disable it."),
|
||
NULL,
|
||
show_exec_done_display_p,
|
||
&setlist, &showlist);
|
||
}
|
||
|
||
void
|
||
gdb_init (char *argv0)
|
||
{
|
||
if (pre_init_ui_hook)
|
||
pre_init_ui_hook ();
|
||
|
||
/* Run the init function of each source file */
|
||
|
||
getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
|
||
current_directory = gdb_dirbuf;
|
||
|
||
#ifdef __MSDOS__
|
||
/* Make sure we return to the original directory upon exit, come
|
||
what may, since the OS doesn't do that for us. */
|
||
make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
|
||
#endif
|
||
|
||
init_cmd_lists (); /* This needs to be done first */
|
||
initialize_targets (); /* Setup target_terminal macros for utils.c */
|
||
initialize_utils (); /* Make errors and warnings possible */
|
||
initialize_all_files ();
|
||
initialize_current_architecture ();
|
||
init_cli_cmds();
|
||
init_main (); /* But that omits this file! Do it now */
|
||
|
||
initialize_stdin_serial ();
|
||
|
||
async_init_signals ();
|
||
|
||
/* 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. */
|
||
|
||
/* Allow another UI to initialize. If the UI fails to initialize,
|
||
and it wants GDB to revert to the CLI, it should clear
|
||
deprecated_init_ui_hook. */
|
||
if (deprecated_init_ui_hook)
|
||
deprecated_init_ui_hook (argv0);
|
||
}
|