mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
9a4105ab85
* annotate.h (deprecated_annotate_starting_hook) (deprecated_annotate_stopped_hook) (deprecated_annotate_exited_hook) (deprecated_annotate_signal_hook) (deprecated_annotate_signalled_hook): Deprecate. * tracepoint.h (deprecated_create_tracepoint_hook) (deprecated_delete_tracepoint_hook) (deprecated_modify_tracepoint_hook) (deprecated_trace_find_hook) (deprecated_trace_start_stop_hook): Deprecate. * target.h (deprecated_target_new_objfile_hook): Deprecate. * remote.h (deprecated_target_resume_hook) (deprecated_target_wait_loop_hook): Deprecate. * gdbcore.h (deprecated_exec_file_display_hook) (deprecated_file_changed_hook): Deprecate. * frame.h (deprecated_selected_frame_level_changed_hook): Deprecate. * defs.h (deprecated_modify_breakpoint_hook) (deprecated_command_loop_hook, deprecated_show_load_progress) (deprecated_print_frame_info_listing_hook) (deprecated_query_hook, deprecated_warning_hook) (deprecated_flush_hook, deprecated_create_breakpoint_hook) (deprecated_delete_breakpoint_hook) (deprecated_interactive_hook, deprecated_registers_changed_hook) (deprecated_readline_begin_hook, deprecated_readline_hook) (deprecated_readline_end_hook, deprecated_register_changed_hook) (deprecated_memory_changed_hook, deprecated_init_ui_hook) (deprecated_context_hook, deprecated_target_wait_hook) (deprecated_attach_hook, deprecated_detach_hook) (deprecated_call_command_hook, deprecated_set_hook) (deprecated_error_hook, deprecated_error_begin_hook) (deprecated_ui_load_progress_hook): Deprecate. * valops.c, uw-thread.c, utils.c, tui/tui-io.c: Update. * tui/tui-hooks.c, tracepoint.c, top.c, thread-db.c: Update. * target.c, symfile.c, stack.c, sol-thread.c, rs6000-nat.c: Update. * remote.c, remote-mips.c, regcache.c, mi/mi-interp.c: Update. * main.c, interps.c, infcmd.c, hpux-thread.c, frame.c: Update. * exec.c, dsrec.c, d10v-tdep.c, corefile.c, complaints.c: Update. * cli/cli-script.c, cli/cli-setshow.c, breakpoint.c: Update. * annotate.c, aix-thread.c: Update.
1915 lines
56 KiB
C
1915 lines
56 KiB
C
/* Top level stuff for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
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1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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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
|
||
(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,
|
||
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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You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "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 <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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/* 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 <setjmp.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 GDBINIT_FILENAME
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#define GDBINIT_FILENAME ".gdbinit"
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#endif
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char gdbinit[] = GDBINIT_FILENAME;
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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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/* 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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/* 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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/* Level of control structure. */
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static int control_level;
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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 (*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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/* Called when the registers have changed, as a hint to a GUI
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to minimize window update. */
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void (*deprecated_registers_changed_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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NORETURN void (*deprecated_error_hook) (void) ATTR_NORETURN;
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/* One should use catch_errors rather than manipulating these
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directly. */
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#if defined(HAVE_SIGSETJMP)
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#define SIGJMP_BUF sigjmp_buf
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#define SIGSETJMP(buf) sigsetjmp((buf), 1)
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#define SIGLONGJMP(buf,val) siglongjmp((buf), (val))
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#else
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#define SIGJMP_BUF jmp_buf
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#define SIGSETJMP(buf) setjmp(buf)
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#define SIGLONGJMP(buf,val) longjmp((buf), (val))
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#endif
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/* Where to go for throw_exception(). */
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static SIGJMP_BUF *catch_return;
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/* Return for reason REASON to the nearest containing catch_errors(). */
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NORETURN void
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throw_exception (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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if (event_loop_p && target_can_async_p () && !target_executing)
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do_exec_cleanups (ALL_CLEANUPS);
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if (event_loop_p && sync_execution)
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do_exec_error_cleanups (ALL_CLEANUPS);
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if (annotation_level > 1)
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switch (reason)
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{
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case RETURN_QUIT:
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annotate_quit ();
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break;
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case RETURN_ERROR:
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annotate_error ();
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break;
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}
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/* Jump to the containing catch_errors() call, communicating REASON
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to that call via setjmp's return value. Note that REASON can't
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be zero, by definition in defs.h. */
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(NORETURN void) SIGLONGJMP (*catch_return, (int) reason);
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}
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/* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any
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errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the
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function is aborted (using throw_exception() or zero if the
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function returns normally. Set FUNC_VAL to the value returned by
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the function or 0 if the function was aborted.
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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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/* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with
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error() et.al. could maintain a set of flags that indicate the the
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current state of each of the longjmp buffers. This would give the
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longjmp code the chance to detect a longjmp botch (before it gets
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to longjmperror()). Prior to 1999-11-05 this wasn't possible as
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code also randomly used a SET_TOP_LEVEL macro that directly
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initialize the longjmp buffers. */
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/* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code
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be consolidated into a single file instead of being distributed
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between utils.c and top.c? */
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static void
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catcher (catch_exceptions_ftype *func,
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struct ui_out *func_uiout,
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void *func_args,
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int *func_val,
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enum return_reason *func_caught,
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char *errstring,
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char **gdberrmsg,
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return_mask mask)
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{
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SIGJMP_BUF *saved_catch;
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SIGJMP_BUF catch;
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struct cleanup *saved_cleanup_chain;
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char *saved_error_pre_print;
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char *saved_quit_pre_print;
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struct ui_out *saved_uiout;
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/* Return value from SIGSETJMP(): enum return_reason if error or
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quit caught, 0 otherwise. */
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int caught;
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/* Return value from FUNC(): Hopefully non-zero. Explicitly set to
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zero if an error quit was caught. */
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int val;
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/* Override error/quit messages during FUNC. */
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saved_error_pre_print = error_pre_print;
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saved_quit_pre_print = quit_pre_print;
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if (mask & RETURN_MASK_ERROR)
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error_pre_print = errstring;
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if (mask & RETURN_MASK_QUIT)
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quit_pre_print = errstring;
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||
|
||
/* Override the global ``struct ui_out'' builder. */
|
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saved_uiout = uiout;
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uiout = func_uiout;
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|
||
/* Prevent error/quit during FUNC from calling cleanups established
|
||
prior to here. */
|
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|
||
saved_cleanup_chain = save_cleanups ();
|
||
|
||
/* Call FUNC, catching error/quit events. */
|
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|
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saved_catch = catch_return;
|
||
catch_return = &catch;
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||
caught = SIGSETJMP (catch);
|
||
if (!caught)
|
||
val = (*func) (func_uiout, func_args);
|
||
else
|
||
{
|
||
val = 0;
|
||
/* If caller wants a copy of the low-level error message, make one.
|
||
This is used in the case of a silent error whereby the caller
|
||
may optionally want to issue the message. */
|
||
if (gdberrmsg)
|
||
*gdberrmsg = error_last_message ();
|
||
}
|
||
catch_return = saved_catch;
|
||
|
||
/* FIXME: cagney/1999-11-05: A correct FUNC implementation will
|
||
clean things up (restoring the cleanup chain) to the state they
|
||
were just prior to the call. Unfortunately, many FUNC's are not
|
||
that well behaved. This could be fixed by adding either a
|
||
do_cleanups call (to cover the problem) or an assertion check to
|
||
detect bad FUNCs code. */
|
||
|
||
/* Restore the cleanup chain, the error/quit messages, and the uiout
|
||
builder, to their original states. */
|
||
|
||
restore_cleanups (saved_cleanup_chain);
|
||
|
||
uiout = saved_uiout;
|
||
|
||
if (mask & RETURN_MASK_QUIT)
|
||
quit_pre_print = saved_quit_pre_print;
|
||
if (mask & RETURN_MASK_ERROR)
|
||
error_pre_print = saved_error_pre_print;
|
||
|
||
/* Return normally if no error/quit event occurred or this catcher
|
||
can handle this exception. The caller analyses the func return
|
||
values. */
|
||
|
||
if (!caught || (mask & RETURN_MASK (caught)))
|
||
{
|
||
*func_val = val;
|
||
*func_caught = caught;
|
||
return;
|
||
}
|
||
|
||
/* The caller didn't request that the event be caught, relay the
|
||
event to the next containing catch_errors(). */
|
||
|
||
throw_exception (caught);
|
||
}
|
||
|
||
int
|
||
catch_exceptions (struct ui_out *uiout,
|
||
catch_exceptions_ftype *func,
|
||
void *func_args,
|
||
char *errstring,
|
||
return_mask mask)
|
||
{
|
||
int val;
|
||
enum return_reason caught;
|
||
catcher (func, uiout, func_args, &val, &caught, errstring, NULL, mask);
|
||
gdb_assert (val >= 0);
|
||
gdb_assert (caught <= 0);
|
||
if (caught < 0)
|
||
return caught;
|
||
return val;
|
||
}
|
||
|
||
int
|
||
catch_exceptions_with_msg (struct ui_out *uiout,
|
||
catch_exceptions_ftype *func,
|
||
void *func_args,
|
||
char *errstring,
|
||
char **gdberrmsg,
|
||
return_mask mask)
|
||
{
|
||
int val;
|
||
enum return_reason caught;
|
||
catcher (func, uiout, func_args, &val, &caught, errstring, gdberrmsg, mask);
|
||
gdb_assert (val >= 0);
|
||
gdb_assert (caught <= 0);
|
||
if (caught < 0)
|
||
return caught;
|
||
return val;
|
||
}
|
||
|
||
struct catch_errors_args
|
||
{
|
||
catch_errors_ftype *func;
|
||
void *func_args;
|
||
};
|
||
|
||
static int
|
||
do_catch_errors (struct ui_out *uiout, void *data)
|
||
{
|
||
struct catch_errors_args *args = data;
|
||
return args->func (args->func_args);
|
||
}
|
||
|
||
int
|
||
catch_errors (catch_errors_ftype *func, void *func_args, char *errstring,
|
||
return_mask mask)
|
||
{
|
||
int val;
|
||
enum return_reason caught;
|
||
struct catch_errors_args args;
|
||
args.func = func;
|
||
args.func_args = func_args;
|
||
catcher (do_catch_errors, uiout, &args, &val, &caught, errstring,
|
||
NULL, mask);
|
||
if (caught != 0)
|
||
return 0;
|
||
return val;
|
||
}
|
||
|
||
struct captured_command_args
|
||
{
|
||
catch_command_errors_ftype *command;
|
||
char *arg;
|
||
int from_tty;
|
||
};
|
||
|
||
static int
|
||
do_captured_command (void *data)
|
||
{
|
||
struct captured_command_args *context = data;
|
||
context->command (context->arg, context->from_tty);
|
||
/* FIXME: cagney/1999-11-07: Technically this do_cleanups() call
|
||
isn't needed. Instead an assertion check could be made that
|
||
simply confirmed that the called function correctly cleaned up
|
||
after itself. Unfortunately, old code (prior to 1999-11-04) in
|
||
main.c was calling SET_TOP_LEVEL(), calling the command function,
|
||
and then *always* calling do_cleanups(). For the moment we
|
||
remain ``bug compatible'' with that old code.. */
|
||
do_cleanups (ALL_CLEANUPS);
|
||
return 1;
|
||
}
|
||
|
||
int
|
||
catch_command_errors (catch_command_errors_ftype * command,
|
||
char *arg, int from_tty, return_mask mask)
|
||
{
|
||
struct captured_command_args args;
|
||
args.command = command;
|
||
args.arg = arg;
|
||
args.from_tty = from_tty;
|
||
return catch_errors (do_captured_command, &args, "", mask);
|
||
}
|
||
|
||
|
||
/* Handler for SIGHUP. */
|
||
|
||
#ifdef SIGHUP
|
||
/* Just a little helper function for disconnect(). */
|
||
|
||
/* NOTE 1999-04-29: This function 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
|
||
quit_cover (void *s)
|
||
{
|
||
caution = 0; /* Throw caution to the wind -- we're exiting.
|
||
This prevents asking the user dumb questions. */
|
||
quit_command ((char *) 0, 0);
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
disconnect (int signo)
|
||
{
|
||
catch_errors (quit_cover, NULL,
|
||
"Could not kill the program being debugged", RETURN_MASK_ALL);
|
||
signal (SIGHUP, SIG_DFL);
|
||
kill (getpid (), SIGHUP);
|
||
}
|
||
#endif /* defined SIGHUP */
|
||
|
||
/* Line number we are currently in in a file which is being sourced. */
|
||
/* 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 source_line_number;
|
||
|
||
/* Name of the file we are sourcing. */
|
||
/* 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 */ char *source_file_name;
|
||
|
||
/* Buffer containing the error_pre_print used by the source stuff.
|
||
Malloc'd. */
|
||
/* 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 */ char *source_error;
|
||
static int source_error_allocated;
|
||
|
||
/* Something to glom on to the start of error_pre_print if source_file_name
|
||
is set. */
|
||
/* 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 */ char *source_pre_error;
|
||
|
||
/* Clean up on error during a "source" command (or execution of a
|
||
user-defined command). */
|
||
|
||
void
|
||
do_restore_instream_cleanup (void *stream)
|
||
{
|
||
/* Restore the previous input stream. */
|
||
instream = stream;
|
||
}
|
||
|
||
/* Read commands from STREAM. */
|
||
void
|
||
read_command_file (FILE *stream)
|
||
{
|
||
struct cleanup *cleanups;
|
||
|
||
cleanups = make_cleanup (do_restore_instream_cleanup, instream);
|
||
instream = stream;
|
||
command_loop ();
|
||
do_cleanups (cleanups);
|
||
}
|
||
|
||
void (*pre_init_ui_hook) (void);
|
||
|
||
#ifdef __MSDOS__
|
||
void
|
||
do_chdir_cleanup (void *old_dir)
|
||
{
|
||
chdir (old_dir);
|
||
xfree (old_dir);
|
||
}
|
||
#endif
|
||
|
||
/* Execute the line P as a command.
|
||
Pass FROM_TTY as second argument to the defining function. */
|
||
|
||
void
|
||
execute_command (char *p, int from_tty)
|
||
{
|
||
struct cmd_list_element *c;
|
||
enum language flang;
|
||
static int warned = 0;
|
||
char *line;
|
||
|
||
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;
|
||
|
||
serial_log_command (p);
|
||
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
if (*p)
|
||
{
|
||
char *arg;
|
||
line = p;
|
||
|
||
c = lookup_cmd (&p, cmdlist, "", 0, 1);
|
||
|
||
/* If the target is running, we allow only a limited set of
|
||
commands. */
|
||
if (event_loop_p && 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, "stop") != 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_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;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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 (%c%ld for this command)\n",
|
||
space_now,
|
||
(space_diff >= 0 ? '+' : '-'),
|
||
space_diff);
|
||
#endif
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Read commands from `instream' and execute them until end of file or
|
||
error reading instream. This command loop doesnt care about any
|
||
such things as displaying time and space usage. If the user asks
|
||
for those, they won't work. */
|
||
void
|
||
simplified_command_loop (char *(*read_input_func) (char *),
|
||
void (*execute_command_func) (char *, int))
|
||
{
|
||
struct cleanup *old_chain;
|
||
char *command;
|
||
int stdin_is_tty = ISATTY (stdin);
|
||
|
||
while (instream && !feof (instream))
|
||
{
|
||
quit_flag = 0;
|
||
if (instream == stdin && stdin_is_tty)
|
||
reinitialize_more_filter ();
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Get a command-line. */
|
||
command = (*read_input_func) (instream == stdin ?
|
||
get_prompt () : (char *) NULL);
|
||
|
||
if (command == 0)
|
||
return;
|
||
|
||
(*execute_command_func) (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 (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')
|
||
#ifndef CRLF_SOURCE_FILES
|
||
break;
|
||
#else
|
||
{
|
||
if (input_index > 0 && result[input_index - 1] == '\r')
|
||
input_index--;
|
||
break;
|
||
}
|
||
#endif
|
||
|
||
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 int history_size;
|
||
static char *history_filename;
|
||
|
||
/* This is like readline(), but it has some gdb-specific behavior.
|
||
gdb can use 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 just calls readline() directly, running it in
|
||
synchronous mode. So for operate-and-get-next to work in this
|
||
situation, we have to switch the hooks around. That is what
|
||
gdb_readline_wrapper is for. */
|
||
char *
|
||
gdb_readline_wrapper (char *prompt)
|
||
{
|
||
/* Set the hook that works in this case. */
|
||
if (event_loop_p && after_char_processing_hook)
|
||
{
|
||
rl_pre_input_hook = (Function *) after_char_processing_hook;
|
||
after_char_processing_hook = NULL;
|
||
}
|
||
|
||
return readline (prompt);
|
||
}
|
||
|
||
|
||
#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);
|
||
}
|
||
|
||
static void
|
||
init_signals (void)
|
||
{
|
||
signal (SIGINT, request_quit);
|
||
|
||
/* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
|
||
to the inferior and breakpoints will be ignored. */
|
||
#ifdef SIGTRAP
|
||
signal (SIGTRAP, SIG_DFL);
|
||
#endif
|
||
|
||
/* 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);
|
||
#ifdef SIGHUP
|
||
if (signal (SIGHUP, do_nothing) != SIG_IGN)
|
||
signal (SIGHUP, disconnect);
|
||
#endif
|
||
signal (SIGFPE, float_handler);
|
||
|
||
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
|
||
signal (SIGWINCH, SIGWINCH_HANDLER);
|
||
#endif
|
||
}
|
||
|
||
/* 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;
|
||
|
||
if (event_loop_p)
|
||
{
|
||
/* Use the async hook. */
|
||
after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
|
||
}
|
||
else
|
||
{
|
||
/* This hook only works correctly when we are using the
|
||
synchronous readline. */
|
||
rl_pre_input_hook = (Function *) 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)
|
||
{
|
||
if (event_loop_p)
|
||
signal (STOP_SIGNAL, handle_stop_sig);
|
||
else
|
||
signal (STOP_SIGNAL, 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;
|
||
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;
|
||
}
|
||
|
||
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 && instream == NULL)
|
||
{
|
||
rl = (*deprecated_readline_hook) (local_prompt);
|
||
}
|
||
else if (command_editing_p && instream == stdin && ISATTY (instream))
|
||
{
|
||
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 2004 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, "\
|
||
GDB is free software, covered by the GNU General Public License, and you are\n\
|
||
welcome to change it and/or distribute copies of it under certain conditions.\n\
|
||
Type \"show copying\" to see the conditions.\n\
|
||
There is absolutely no warranty for GDB. Type \"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)
|
||
{
|
||
if (event_loop_p)
|
||
return PROMPT (0);
|
||
else
|
||
return gdb_prompt_string;
|
||
}
|
||
|
||
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);
|
||
*/
|
||
if (event_loop_p)
|
||
PROMPT (0) = savestring (s, strlen (s));
|
||
else
|
||
gdb_prompt_string = 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);
|
||
}
|
||
|
||
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 whether the user
|
||
desires that questions be asked of them on that terminal. */
|
||
|
||
int
|
||
input_from_terminal_p (void)
|
||
{
|
||
return gdb_has_a_terminal () && (instream == stdin) & caution;
|
||
}
|
||
|
||
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", NULL);
|
||
#else
|
||
history_filename = concat (current_directory, "/.gdb_history", NULL);
|
||
#endif
|
||
}
|
||
read_history (history_filename);
|
||
}
|
||
|
||
static void
|
||
init_main (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
/* If we are running the asynchronous version,
|
||
we initialize the prompts differently. */
|
||
if (!event_loop_p)
|
||
{
|
||
gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT));
|
||
}
|
||
else
|
||
{
|
||
/* 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);
|
||
|
||
/* The set prompt command is different depending whether or not the
|
||
async version is run. NOTE: this difference is going to
|
||
disappear as we make the event loop be the default engine of
|
||
gdb. */
|
||
if (!event_loop_p)
|
||
{
|
||
add_show_from_set
|
||
(add_set_cmd ("prompt", class_support, var_string,
|
||
(char *) &gdb_prompt_string, "Set gdb's prompt",
|
||
&setlist),
|
||
&showlist);
|
||
}
|
||
else
|
||
{
|
||
c = add_set_cmd ("prompt", class_support, var_string,
|
||
(char *) &new_async_prompt, "Set gdb's prompt",
|
||
&setlist);
|
||
add_show_from_set (c, &showlist);
|
||
set_cmd_sfunc (c, set_async_prompt);
|
||
}
|
||
|
||
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.");
|
||
|
||
/* The set editing command is different depending whether or not the
|
||
async version is run. NOTE: this difference is going to disappear
|
||
as we make the event loop be the default engine of gdb. */
|
||
if (!event_loop_p)
|
||
{
|
||
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 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);
|
||
}
|
||
else
|
||
{
|
||
c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p,
|
||
"Set editing of command lines as they are typed.\n\
|
||
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.", &setlist);
|
||
|
||
add_show_from_set (c, &showlist);
|
||
set_cmd_sfunc (c, set_async_editing_command);
|
||
}
|
||
|
||
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 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);
|
||
set_cmd_sfunc (c, set_history_size_command);
|
||
|
||
c = 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);
|
||
set_cmd_completer (c, filename_completer);
|
||
add_show_from_set (c, &showhistlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("confirm", class_support, var_boolean,
|
||
(char *) &caution,
|
||
"Set whether to confirm potentially dangerous operations.",
|
||
&setlist),
|
||
&showlist);
|
||
|
||
/* The set annotate command is different depending whether or not
|
||
the async version is run. NOTE: this difference is going to
|
||
disappear as we make the event loop be the default engine of
|
||
gdb. */
|
||
if (!event_loop_p)
|
||
{
|
||
c = add_set_cmd ("annotate", class_obscure, var_zinteger,
|
||
(char *) &annotation_level, "Set annotation_level.\n\
|
||
0 == normal; 1 == fullname (for use when running under emacs)\n\
|
||
2 == output annotated suitably for use by programs that control GDB.",
|
||
&setlist);
|
||
c = add_show_from_set (c, &showlist);
|
||
}
|
||
else
|
||
{
|
||
c = add_set_cmd ("annotate", class_obscure, var_zinteger,
|
||
(char *) &annotation_level, "Set annotation_level.\n\
|
||
0 == normal; 1 == fullname (for use when running under emacs)\n\
|
||
2 == output annotated suitably for use by programs that control GDB.",
|
||
&setlist);
|
||
add_show_from_set (c, &showlist);
|
||
set_cmd_sfunc (c, set_async_annotation_level);
|
||
}
|
||
if (event_loop_p)
|
||
{
|
||
add_show_from_set
|
||
(add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p,
|
||
"Set notification of completion for asynchronous execution commands.\n\
|
||
Use \"on\" to enable the notification, and \"off\" to disable it.", &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 */
|
||
|
||
/* The signal handling mechanism is different depending whether or
|
||
not the async version is run. NOTE: in the future we plan to make
|
||
the event loop be the default engine of gdb, and this difference
|
||
will disappear. */
|
||
if (event_loop_p)
|
||
async_init_signals ();
|
||
else
|
||
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);
|
||
}
|