456 lines
11 KiB
C
456 lines
11 KiB
C
/* GDB hooks for TUI.
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Copyright 2001, 2002 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* FIXME: cagney/2002-02-28: The GDB coding standard indicates that
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"defs.h" should be included first. Unfortunatly some systems
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(currently Debian GNU/Linux) include the <stdbool.h> via <curses.h>
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and they clash with "bfd.h"'s definiton of true/false. The correct
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fix is to remove true/false from "bfd.h", however, until that
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happens, hack around it by including "config.h" and <curses.h>
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first. */
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#include "config.h"
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#ifdef HAVE_NCURSES_H
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#include <ncurses.h>
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#else
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#ifdef HAVE_CURSES_H
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#include <curses.h>
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#endif
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#endif
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#include "defs.h"
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#include "symtab.h"
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#include "inferior.h"
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#include "command.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "event-loop.h"
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#include "event-top.h"
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#include "frame.h"
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#include "breakpoint.h"
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#include "gdb-events.h"
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#include "ui-out.h"
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#include "top.h"
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#include <readline/readline.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "tui.h"
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#include "tuiData.h"
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#include "tuiLayout.h"
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#include "tuiIO.h"
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#include "tuiRegs.h"
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#include "tuiWin.h"
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#include "tuiStack.h"
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#include "tuiDataWin.h"
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#include "tuiSourceWin.h"
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int tui_target_has_run = 0;
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static void (* tui_target_new_objfile_chain) (struct objfile*);
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static void tui_event_loop (void);
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static void tui_command_loop (void);
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static void
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tui_new_objfile_hook (struct objfile* objfile)
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{
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if (tui_active)
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tui_display_main ();
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if (tui_target_new_objfile_chain)
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tui_target_new_objfile_chain (objfile);
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}
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static int
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tui_query_hook (const char * msg, va_list argp)
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{
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int retval;
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int ans2;
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int answer;
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/* Automatically answer "yes" if input is not from a terminal. */
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if (!input_from_terminal_p ())
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return 1;
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echo ();
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while (1)
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{
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wrap_here (""); /* Flush any buffered output */
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gdb_flush (gdb_stdout);
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vfprintf_filtered (gdb_stdout, msg, argp);
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printf_filtered ("(y or n) ");
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wrap_here ("");
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gdb_flush (gdb_stdout);
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answer = tui_getc (stdin);
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clearerr (stdin); /* in case of C-d */
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if (answer == EOF) /* C-d */
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{
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retval = 1;
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break;
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}
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/* Eat rest of input line, to EOF or newline */
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if (answer != '\n')
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do
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{
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ans2 = tui_getc (stdin);
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clearerr (stdin);
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}
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while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
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if (answer >= 'a')
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answer -= 040;
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if (answer == 'Y')
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{
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retval = 1;
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break;
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}
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if (answer == 'N')
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{
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retval = 0;
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break;
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}
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printf_filtered ("Please answer y or n.\n");
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}
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noecho ();
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return retval;
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}
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/* Prevent recursion of registers_changed_hook(). */
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static int tui_refreshing_registers = 0;
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static void
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tui_registers_changed_hook (void)
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{
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struct frame_info *fi;
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fi = selected_frame;
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if (fi && tui_refreshing_registers == 0)
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{
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tui_refreshing_registers = 1;
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#if 0
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tuiCheckDataValues (fi);
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#endif
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tui_refreshing_registers = 0;
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}
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}
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static void
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tui_register_changed_hook (int regno)
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{
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struct frame_info *fi;
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fi = selected_frame;
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if (fi && tui_refreshing_registers == 0)
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{
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tui_refreshing_registers = 1;
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tuiCheckDataValues (fi);
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tui_refreshing_registers = 0;
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}
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}
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/* Breakpoint creation hook.
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Update the screen to show the new breakpoint. */
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static void
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tui_event_create_breakpoint (int number)
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{
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tui_update_all_breakpoint_info ();
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}
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/* Breakpoint deletion hook.
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Refresh the screen to update the breakpoint marks. */
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static void
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tui_event_delete_breakpoint (int number)
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{
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tui_update_all_breakpoint_info ();
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}
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static void
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tui_event_modify_breakpoint (int number)
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{
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tui_update_all_breakpoint_info ();
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}
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static void
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tui_event_default (int number)
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{
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;
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}
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static struct gdb_events *tui_old_event_hooks;
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static struct gdb_events tui_event_hooks =
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{
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tui_event_create_breakpoint,
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tui_event_delete_breakpoint,
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tui_event_modify_breakpoint,
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tui_event_default,
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tui_event_default,
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tui_event_default
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};
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/* Called when going to wait for the target.
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Leave curses mode and setup program mode. */
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static ptid_t
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tui_target_wait_hook (ptid_t pid, struct target_waitstatus *status)
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{
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ptid_t res;
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/* Leave tui mode (optional). */
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#if 0
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if (tui_active)
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{
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target_terminal_ours ();
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endwin ();
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target_terminal_inferior ();
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}
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#endif
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tui_target_has_run = 1;
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res = target_wait (pid, status);
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if (tui_active)
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{
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/* TODO: need to refresh (optional). */
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}
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return res;
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}
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/* The selected frame has changed. This is happens after a target
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stop or when the user explicitly changes the frame (up/down/thread/...). */
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static void
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tui_selected_frame_level_changed_hook (int level)
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{
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struct frame_info *fi;
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fi = selected_frame;
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/* Ensure that symbols for this frame are read in. Also, determine the
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source language of this frame, and switch to it if desired. */
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if (fi)
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{
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struct symtab *s;
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s = find_pc_symtab (fi->pc);
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/* elz: this if here fixes the problem with the pc not being displayed
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in the tui asm layout, with no debug symbols. The value of s
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would be 0 here, and select_source_symtab would abort the
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command by calling the 'error' function */
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if (s)
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select_source_symtab (s);
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/* Display the frame position (even if there is no symbols). */
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tuiShowFrameInfo (fi);
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/* Refresh the register window if it's visible. */
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if (tui_is_window_visible (DATA_WIN))
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{
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tui_refreshing_registers = 1;
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tuiCheckDataValues (fi);
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tui_refreshing_registers = 0;
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}
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}
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}
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/* Called from print_frame_info to list the line we stopped in. */
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static void
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tui_print_frame_info_listing_hook (struct symtab *s, int line,
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int stopline, int noerror)
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{
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select_source_symtab (s);
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tuiShowFrameInfo (selected_frame);
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}
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/* Called when the target process died or is detached.
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Update the status line. */
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static void
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tui_detach_hook (void)
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{
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tuiShowFrameInfo (0);
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tui_display_main ();
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}
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/* Install the TUI specific hooks. */
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void
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tui_install_hooks (void)
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{
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target_wait_hook = tui_target_wait_hook;
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selected_frame_level_changed_hook = tui_selected_frame_level_changed_hook;
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print_frame_info_listing_hook = tui_print_frame_info_listing_hook;
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query_hook = tui_query_hook;
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/* Install the event hooks. */
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tui_old_event_hooks = set_gdb_event_hooks (&tui_event_hooks);
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registers_changed_hook = tui_registers_changed_hook;
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register_changed_hook = tui_register_changed_hook;
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detach_hook = tui_detach_hook;
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}
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/* Remove the TUI specific hooks. */
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void
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tui_remove_hooks (void)
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{
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target_wait_hook = 0;
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selected_frame_level_changed_hook = 0;
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print_frame_info_listing_hook = 0;
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query_hook = 0;
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registers_changed_hook = 0;
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register_changed_hook = 0;
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detach_hook = 0;
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/* Restore the previous event hooks. */
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set_gdb_event_hooks (tui_old_event_hooks);
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}
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/* Cleanup the tui before exiting. */
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static void
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tui_exit (void)
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{
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/* Disable the tui. Curses mode is left leaving the screen
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in a clean state (see endwin()). */
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tui_disable ();
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}
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/* Initialize all the necessary variables, start the event loop,
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register readline, and stdin, start the loop. */
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static void
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tui_command_loop (void)
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{
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int length;
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char *a_prompt;
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char *gdb_prompt = get_prompt ();
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/* If we are using readline, set things up and display the first
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prompt, otherwise just print the prompt. */
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if (async_command_editing_p)
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{
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/* Tell readline what the prompt to display is and what function it
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will need to call after a whole line is read. This also displays
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the first prompt. */
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length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
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a_prompt = (char *) xmalloc (length);
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strcpy (a_prompt, PREFIX (0));
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strcat (a_prompt, gdb_prompt);
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strcat (a_prompt, SUFFIX (0));
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rl_callback_handler_install (a_prompt, input_handler);
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}
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else
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display_gdb_prompt (0);
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/* Now it's time to start the event loop. */
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tui_event_loop ();
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}
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/* Start up the event loop. This is the entry point to the event loop
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from the command loop. */
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static void
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tui_event_loop (void)
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{
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/* Loop until there is nothing to do. This is the entry point to the
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event loop engine. gdb_do_one_event, called via catch_errors()
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will process one event for each invocation. It blocks waits for
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an event and then processes it. >0 when an event is processed, 0
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when catch_errors() caught an error and <0 when there are no
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longer any event sources registered. */
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while (1)
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{
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int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
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if (result < 0)
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break;
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/* Update gdb output according to TUI mode. Since catch_errors
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preserves the uiout from changing, this must be done at top
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level of event loop. */
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if (tui_active)
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uiout = tui_out;
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else
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uiout = tui_old_uiout;
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if (result == 0)
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{
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/* FIXME: this should really be a call to a hook that is
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interface specific, because interfaces can display the
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prompt in their own way. */
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display_gdb_prompt (0);
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/* This call looks bizarre, but it is required. If the user
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entered a command that caused an error,
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after_char_processing_hook won't be called from
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rl_callback_read_char_wrapper. Using a cleanup there
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won't work, since we want this function to be called
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after a new prompt is printed. */
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if (after_char_processing_hook)
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(*after_char_processing_hook) ();
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/* Maybe better to set a flag to be checked somewhere as to
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whether display the prompt or not. */
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}
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}
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/* We are done with the event loop. There are no more event sources
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to listen to. So we exit GDB. */
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return;
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}
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/* Initialize the tui by installing several gdb hooks, initializing
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the tui IO and preparing the readline with the kind binding. */
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static void
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tui_init_hook (char *argv0)
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{
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/* Don't enable the TUI if a specific interpreter is installed. */
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if (interpreter_p)
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return;
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/* Install exit handler to leave the screen in a good shape. */
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atexit (tui_exit);
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initializeStaticData ();
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/* Install the permanent hooks. */
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tui_target_new_objfile_chain = target_new_objfile_hook;
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target_new_objfile_hook = tui_new_objfile_hook;
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tui_initialize_io ();
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tui_initialize_readline ();
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/* Tell gdb to use the tui_command_loop as the main loop. */
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command_loop_hook = tui_command_loop;
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/* Decide in which mode to start using GDB (based on -tui). */
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if (tui_version)
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{
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tui_enable ();
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}
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}
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/* Initialize the tui. */
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void
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_initialize_tui (void)
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{
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/* Setup initialization hook. */
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init_ui_hook = tui_init_hook;
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}
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