212 lines
5.7 KiB
C
212 lines
5.7 KiB
C
/* TUI Interpreter definitions for GDB, the GNU debugger.
|
|
|
|
Copyright 2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "interps.h"
|
|
#include "top.h"
|
|
#include "event-top.h"
|
|
#include "event-loop.h"
|
|
#include "ui-out.h"
|
|
#include "cli-out.h"
|
|
#include "tui/tui-data.h"
|
|
#include "readline/readline.h"
|
|
#include "tui/tui-win.h"
|
|
#include "tui/tui.h"
|
|
#include "tui/tui-io.h"
|
|
#include "exceptions.h"
|
|
|
|
/* Set to 1 when the TUI mode must be activated when we first start gdb. */
|
|
static int tui_start_enabled = 0;
|
|
|
|
/* Cleanup the tui before exiting. */
|
|
|
|
static void
|
|
tui_exit (void)
|
|
{
|
|
/* Disable the tui. Curses mode is left leaving the screen
|
|
in a clean state (see endwin()). */
|
|
tui_disable ();
|
|
}
|
|
|
|
/* These implement the TUI interpreter. */
|
|
|
|
static void *
|
|
tui_init (void)
|
|
{
|
|
/* Install exit handler to leave the screen in a good shape. */
|
|
atexit (tui_exit);
|
|
|
|
tui_initialize_static_data ();
|
|
|
|
tui_initialize_io ();
|
|
tui_initialize_readline ();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
tui_resume (void *data)
|
|
{
|
|
struct ui_file *stream;
|
|
|
|
/* gdb_setup_readline will change gdb_stdout. If the TUI was previously
|
|
writing to gdb_stdout, then set it to the new gdb_stdout afterwards. */
|
|
|
|
stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
|
|
if (stream != gdb_stdout)
|
|
{
|
|
cli_out_set_stream (tui_old_uiout, stream);
|
|
stream = NULL;
|
|
}
|
|
|
|
gdb_setup_readline ();
|
|
|
|
if (stream != NULL)
|
|
cli_out_set_stream (tui_old_uiout, gdb_stdout);
|
|
|
|
if (tui_start_enabled)
|
|
tui_enable ();
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
tui_suspend (void *data)
|
|
{
|
|
tui_start_enabled = tui_active;
|
|
tui_disable ();
|
|
return 1;
|
|
}
|
|
|
|
/* Display the prompt if we are silent. */
|
|
|
|
static int
|
|
tui_display_prompt_p (void *data)
|
|
{
|
|
if (interp_quiet_p (NULL))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static struct gdb_exception
|
|
tui_exec (void *data, const char *command_str)
|
|
{
|
|
internal_error (__FILE__, __LINE__, _("tui_exec called"));
|
|
}
|
|
|
|
|
|
/* Initialize all the necessary variables, start the event loop,
|
|
register readline, and stdin, start the loop. */
|
|
|
|
static void
|
|
tui_command_loop (void *data)
|
|
{
|
|
int length;
|
|
char *a_prompt;
|
|
char *gdb_prompt = get_prompt ();
|
|
|
|
/* If we are using readline, set things up and display the first
|
|
prompt, otherwise just print the prompt. */
|
|
if (async_command_editing_p)
|
|
{
|
|
/* Tell readline what the prompt to display is and what function
|
|
it will need to call after a whole line is read. This also
|
|
displays the first prompt. */
|
|
length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
|
|
a_prompt = (char *) xmalloc (length);
|
|
strcpy (a_prompt, PREFIX (0));
|
|
strcat (a_prompt, gdb_prompt);
|
|
strcat (a_prompt, SUFFIX (0));
|
|
rl_callback_handler_install (a_prompt, input_handler);
|
|
}
|
|
else
|
|
display_gdb_prompt (0);
|
|
|
|
/* Loop until there is nothing to do. This is the entry point to the
|
|
event loop engine. gdb_do_one_event, called via catch_errors()
|
|
will process one event for each invocation. It blocks waits for
|
|
an event and then processes it. >0 when an event is processed, 0
|
|
when catch_errors() caught an error and <0 when there are no
|
|
longer any event sources registered. */
|
|
while (1)
|
|
{
|
|
int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
|
|
if (result < 0)
|
|
break;
|
|
|
|
/* Update gdb output according to TUI mode. Since catch_errors
|
|
preserves the uiout from changing, this must be done at top
|
|
level of event loop. */
|
|
if (tui_active)
|
|
uiout = tui_out;
|
|
else
|
|
uiout = tui_old_uiout;
|
|
|
|
if (result == 0)
|
|
{
|
|
/* FIXME: this should really be a call to a hook that is
|
|
interface specific, because interfaces can display the
|
|
prompt in their own way. */
|
|
display_gdb_prompt (0);
|
|
/* This call looks bizarre, but it is required. If the user
|
|
entered a command that caused an error,
|
|
after_char_processing_hook won't be called from
|
|
rl_callback_read_char_wrapper. Using a cleanup there
|
|
won't work, since we want this function to be called
|
|
after a new prompt is printed. */
|
|
if (after_char_processing_hook)
|
|
(*after_char_processing_hook) ();
|
|
/* Maybe better to set a flag to be checked somewhere as to
|
|
whether display the prompt or not. */
|
|
}
|
|
}
|
|
|
|
/* We are done with the event loop. There are no more event sources
|
|
to listen to. So we exit GDB. */
|
|
return;
|
|
}
|
|
|
|
void
|
|
_initialize_tui_interp (void)
|
|
{
|
|
static const struct interp_procs procs = {
|
|
tui_init,
|
|
tui_resume,
|
|
tui_suspend,
|
|
tui_exec,
|
|
tui_display_prompt_p,
|
|
tui_command_loop,
|
|
};
|
|
struct interp *tui_interp;
|
|
|
|
/* Create a default uiout builder for the TUI. */
|
|
tui_out = tui_out_new (gdb_stdout);
|
|
interp_add (interp_new (INTERP_TUI, NULL, tui_out, &procs));
|
|
if (interpreter_p && strcmp (interpreter_p, INTERP_TUI) == 0)
|
|
tui_start_enabled = 1;
|
|
|
|
if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
|
|
{
|
|
xfree (interpreter_p);
|
|
interpreter_p = xstrdup (INTERP_TUI);
|
|
}
|
|
}
|