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/* CLI Definitions for GDB, the GNU debugger.
Copyright (C) 2002-2014 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "interps.h"
#include "event-top.h"
#include "ui-out.h"
#include "cli-out.h"
#include "top.h" /* for "execute_command" */
#include <string.h>
#include "exceptions.h"
#include "infrun.h"
#include "observer.h"
/* These are the ui_out and the interpreter for the console
interpreter. */
struct ui_out *cli_uiout;
static struct interp *cli_interp;
/* Longjmp-safe wrapper for "execute_command". */
static struct gdb_exception safe_execute_command (struct ui_out *uiout,
char *command,
int from_tty);
/* Observers for several run control events. If the interpreter is
quiet (i.e., another interpreter is being run with
interpreter-exec), print nothing. */
/* Observer for the signal_received notification. */
static void
cli_on_signal_received (enum gdb_signal siggnal)
{
if (!interp_quiet_p (cli_interp))
print_signal_received_reason (cli_uiout, siggnal);
}
/* Observer for the end_stepping_range notification. */
static void
cli_on_end_stepping_range (void)
{
if (!interp_quiet_p (cli_interp))
print_end_stepping_range_reason (cli_uiout);
}
/* Observer for the signalled notification. */
static void
cli_on_signal_exited (enum gdb_signal siggnal)
{
if (!interp_quiet_p (cli_interp))
print_signal_exited_reason (cli_uiout, siggnal);
}
/* Observer for the exited notification. */
static void
cli_on_exited (int exitstatus)
{
if (!interp_quiet_p (cli_interp))
print_exited_reason (cli_uiout, exitstatus);
}
/* Observer for the no_history notification. */
static void
cli_on_no_history (void)
{
if (!interp_quiet_p (cli_interp))
print_no_history_reason (cli_uiout);
}
/* These implement the cli out interpreter: */
static void *
cli_interpreter_init (struct interp *self, int top_level)
{
/* If changing this, remember to update tui-interp.c as well. */
observer_attach_end_stepping_range (cli_on_end_stepping_range);
observer_attach_signal_received (cli_on_signal_received);
observer_attach_signal_exited (cli_on_signal_exited);
observer_attach_exited (cli_on_exited);
observer_attach_no_history (cli_on_no_history);
return NULL;
}
static int
cli_interpreter_resume (void *data)
{
struct ui_file *stream;
/*sync_execution = 1; */
/* gdb_setup_readline will change gdb_stdout. If the CLI was
previously writing to gdb_stdout, then set it to the new
gdb_stdout afterwards. */
stream = cli_out_set_stream (cli_uiout, gdb_stdout);
if (stream != gdb_stdout)
{
cli_out_set_stream (cli_uiout, stream);
stream = NULL;
}
gdb_setup_readline ();
if (stream != NULL)
cli_out_set_stream (cli_uiout, gdb_stdout);
return 1;
}
static int
cli_interpreter_suspend (void *data)
{
gdb_disable_readline ();
return 1;
}
/* Don't display the prompt if we are set quiet. */
static int
cli_interpreter_display_prompt_p (void *data)
{
if (interp_quiet_p (NULL))
return 0;
else
return 1;
}
static struct gdb_exception
cli_interpreter_exec (void *data, const char *command_str)
{
struct ui_file *old_stream;
struct gdb_exception result;
/* FIXME: cagney/2003-02-01: Need to const char *propogate
safe_execute_command. */
char *str = strcpy (alloca (strlen (command_str) + 1), command_str);
/* gdb_stdout could change between the time cli_uiout was
initialized and now. Since we're probably using a different
interpreter which has a new ui_file for gdb_stdout, use that one
instead of the default.
It is important that it gets reset everytime, since the user
could set gdb to use a different interpreter. */
old_stream = cli_out_set_stream (cli_uiout, gdb_stdout);
result = safe_execute_command (cli_uiout, str, 1);
cli_out_set_stream (cli_uiout, old_stream);
return result;
}
static struct gdb_exception
safe_execute_command (struct ui_out *command_uiout, char *command, int from_tty)
{
volatile struct gdb_exception e;
struct ui_out *saved_uiout;
/* Save and override the global ``struct ui_out'' builder. */
saved_uiout = current_uiout;
current_uiout = command_uiout;
TRY_CATCH (e, RETURN_MASK_ALL)
{
execute_command (command, from_tty);
}
/* Restore the global builder. */
current_uiout = saved_uiout;
/* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the
caller should print the exception. */
exception_print (gdb_stderr, e);
return e;
}
static struct ui_out *
cli_ui_out (struct interp *self)
{
return cli_uiout;
}
/* Standard gdb initialization hook. */
extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */
void
_initialize_cli_interp (void)
{
static const struct interp_procs procs = {
cli_interpreter_init, /* init_proc */
cli_interpreter_resume, /* resume_proc */
cli_interpreter_suspend, /* suspend_proc */
cli_interpreter_exec, /* exec_proc */
cli_interpreter_display_prompt_p, /* prompt_proc_p */
cli_ui_out, /* ui_out_proc */
NULL, /* set_logging_proc */
cli_command_loop /* command_loop_proc */
};
/* Create a default uiout builder for the CLI. */
cli_uiout = cli_out_new (gdb_stdout);
cli_interp = interp_new (INTERP_CONSOLE, &procs);
interp_add (cli_interp);
}
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