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/* MI Interpreter Definitions and Commands for GDB, the GNU debugger.

   Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008

   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 "gdb_string.h"

#include "interps.h"

#include "event-top.h"

#include "event-loop.h"

#include "inferior.h"

#include "ui-out.h"

#include "top.h"

#include "exceptions.h"

#include "mi-main.h"

#include "mi-cmds.h"

#include "mi-out.h"

#include "mi-console.h"

struct mi_interp

{

  /* MI's output channels */

  struct ui_file *out;

  struct ui_file *err;

  struct ui_file *log;

  struct ui_file *targ;

  struct ui_file *event_channel;

  /* This is the interpreter for the mi... */

  struct interp *mi2_interp;

  struct interp *mi1_interp;

  struct interp *mi_interp;

};

/* These are the interpreter setup, etc. functions for the MI interpreter */

static void mi_execute_command_wrapper (char *cmd);

static void mi_command_loop (int mi_version);

/* These are hooks that we put in place while doing interpreter_exec

   so we can report interesting things that happened "behind the mi's

   back" in this command */

static int mi_interp_query_hook (const char *ctlstr, va_list ap)

     ATTR_FORMAT (printf, 1, 0);

static void mi3_command_loop (void);

static void mi2_command_loop (void);

static void mi1_command_loop (void);

static void mi_insert_notify_hooks (void);

static void mi_remove_notify_hooks (void);

static void *

mi_interpreter_init (void)

{

  struct mi_interp *mi = XMALLOC (struct mi_interp);

  /* HACK: We need to force stdout/stderr to point at the console.  This avoids

     any potential side effects caused by legacy code that is still

     using the TUI / fputs_unfiltered_hook.  So we set up output channels for

     this now, and swap them in when we are run. */

  raw_stdout = stdio_fileopen (stdout);

  /* Create MI channels */

  mi->out = mi_console_file_new (raw_stdout, "~", '"');

  mi->err = mi_console_file_new (raw_stdout, "&", '"');

  mi->log = mi->err;

  mi->targ = mi_console_file_new (raw_stdout, "@", '"');

  mi->event_channel = mi_console_file_new (raw_stdout, "=", 0);

  return mi;

}

static int

mi_interpreter_resume (void *data)

{

  struct mi_interp *mi = data;

  /* As per hack note in mi_interpreter_init, swap in the output channels... */

  gdb_setup_readline ();

  /* These overwrite some of the initialization done in

     _intialize_event_loop.  */

  call_readline = gdb_readline2;

  input_handler = mi_execute_command_wrapper;

  add_file_handler (input_fd, stdin_event_handler, 0);

  async_command_editing_p = 0;

  /* FIXME: This is a total hack for now.  PB's use of the MI

     implicitly relies on a bug in the async support which allows

     asynchronous commands to leak through the commmand loop.  The bug

     involves (but is not limited to) the fact that sync_execution was

     erroneously initialized to 0.  Duplicate by initializing it thus

     here...  */

  sync_execution = 0;

  gdb_stdout = mi->out;

  /* Route error and log output through the MI */

  gdb_stderr = mi->err;

  gdb_stdlog = mi->log;

  /* Route target output through the MI. */

  gdb_stdtarg = mi->targ;

  /* Route target error through the MI as well. */

  gdb_stdtargerr = mi->targ;

  /* Replace all the hooks that we know about.  There really needs to

     be a better way of doing this... */

  clear_interpreter_hooks ();

  deprecated_show_load_progress = mi_load_progress;

  /* If we're _the_ interpreter, take control. */

  if (current_interp_named_p (INTERP_MI1))

    deprecated_command_loop_hook = mi1_command_loop;

  else if (current_interp_named_p (INTERP_MI2))

    deprecated_command_loop_hook = mi2_command_loop;

  else if (current_interp_named_p (INTERP_MI3))

    deprecated_command_loop_hook = mi3_command_loop;

  else

    deprecated_command_loop_hook = mi2_command_loop;

  return 1;

}

static int

mi_interpreter_suspend (void *data)

{

  gdb_disable_readline ();

  return 1;

}

static struct gdb_exception

mi_interpreter_exec (void *data, const char *command)

{

  static struct gdb_exception ok;

  char *tmp = alloca (strlen (command) + 1);

  strcpy (tmp, command);

  mi_execute_command_wrapper (tmp);

  return exception_none;

}

/* Never display the default gdb prompt in mi case.  */

static int

mi_interpreter_prompt_p (void *data)

{

  return 0;

}

static void

mi_interpreter_exec_continuation (struct continuation_arg *arg)

{

  bpstat_do_actions (&stop_bpstat);

  if (!target_executing)

    {

      fputs_unfiltered ("*stopped", raw_stdout);

      mi_out_put (uiout, raw_stdout);

      fputs_unfiltered ("\n", raw_stdout);

      fputs_unfiltered ("(gdb) \n", raw_stdout);

      gdb_flush (raw_stdout);

      do_exec_cleanups (ALL_CLEANUPS);

    }

  else if (target_can_async_p ())

    {

      add_continuation (mi_interpreter_exec_continuation, NULL);

    }

}

enum mi_cmd_result

mi_cmd_interpreter_exec (char *command, char **argv, int argc)

{

  struct interp *interp_to_use;

  enum mi_cmd_result result = MI_CMD_DONE;

  int i;

  struct interp_procs *procs;

  if (argc < 2)

    {

      mi_error_message = xstrprintf ("mi_cmd_interpreter_exec: Usage: -interpreter-exec interp command");

      return MI_CMD_ERROR;

    }

  interp_to_use = interp_lookup (argv[0]);

  if (interp_to_use == NULL)

    {

      mi_error_message = xstrprintf ("mi_cmd_interpreter_exec: could not find interpreter \"%s\"", argv[0]);

      return MI_CMD_ERROR;

    }

  if (!interp_exec_p (interp_to_use))

    {

      mi_error_message = xstrprintf ("mi_cmd_interpreter_exec: interpreter \"%s\" does not support command execution",

                                     argv[0]);

      return MI_CMD_ERROR;

    }

  /* Insert the MI out hooks, making sure to also call the interpreter's hooks

     if it has any. */

  /* KRS: We shouldn't need this... Events should be installed and they should

     just ALWAYS fire something out down the MI channel... */

  mi_insert_notify_hooks ();

  /* Now run the code... */

  for (i = 1; i < argc; i++)

    {

      /* We had to set sync_execution = 0 for the mi (well really for Project

         Builder's use of the mi - particularly so interrupting would work.

         But for console commands to work, we need to initialize it to 1 -

         since that is what the cli expects - before running the command,

         and then set it back to 0 when we are done. */

      sync_execution = 1;

      {

        struct gdb_exception e = interp_exec (interp_to_use, argv[i]);

        if (e.reason < 0)

          {

            mi_error_message = xstrdup (e.message);

            result = MI_CMD_ERROR;

            break;

          }

      }

      do_exec_error_cleanups (ALL_CLEANUPS);

      sync_execution = 0;

    }

  mi_remove_notify_hooks ();

  /* Okay, now let's see if the command set the inferior going...

     Tricky point - have to do this AFTER resetting the interpreter, since

     changing the interpreter will clear out all the continuations for

     that interpreter... */

  if (target_can_async_p () && target_executing)

    {

      fputs_unfiltered ("^running\n", raw_stdout);

      add_continuation (mi_interpreter_exec_continuation, NULL);

    }

  return result;

}

/*

 * mi_insert_notify_hooks - This inserts a number of hooks that are meant to produce

 * async-notify ("=") MI messages while running commands in another interpreter

 * using mi_interpreter_exec.  The canonical use for this is to allow access to

 * the gdb CLI interpreter from within the MI, while still producing MI style output

 * when actions in the CLI command change gdb's state.

*/

static void

mi_insert_notify_hooks (void)

{

  deprecated_query_hook = mi_interp_query_hook;

}

static void

mi_remove_notify_hooks (void)

{

  deprecated_query_hook = NULL;

}

static int

mi_interp_query_hook (const char *ctlstr, va_list ap)

{

  return 1;

}

static void

mi_execute_command_wrapper (char *cmd)

{

  mi_execute_command (cmd, stdin == instream);

}

static void

mi1_command_loop (void)

{

  mi_command_loop (1);

}

static void

mi2_command_loop (void)

{

  mi_command_loop (2);

}

static void

mi3_command_loop (void)

{

  mi_command_loop (3);

}

static void

mi_command_loop (int mi_version)

{

#if 0

  /* HACK: Force stdout/stderr to point at the console.  This avoids

     any potential side effects caused by legacy code that is still

     using the TUI / fputs_unfiltered_hook */

  raw_stdout = stdio_fileopen (stdout);

  /* Route normal output through the MIx */

  gdb_stdout = mi_console_file_new (raw_stdout, "~", '"');

  /* Route error and log output through the MI */

  gdb_stderr = mi_console_file_new (raw_stdout, "&", '"');

  gdb_stdlog = gdb_stderr;

  /* Route target output through the MI. */

  gdb_stdtarg = mi_console_file_new (raw_stdout, "@", '"');

  /* HACK: Poke the ui_out table directly.  Should we be creating a

     mi_out object wired up to the above gdb_stdout / gdb_stderr? */

  uiout = mi_out_new (mi_version);

  /* HACK: Override any other interpreter hooks.  We need to create a

     real event table and pass in that. */

  deprecated_init_ui_hook = 0;

  /* deprecated_command_loop_hook = 0; */

  deprecated_print_frame_info_listing_hook = 0;

  deprecated_query_hook = 0;

  deprecated_warning_hook = 0;

  deprecated_create_breakpoint_hook = 0;

  deprecated_delete_breakpoint_hook = 0;

  deprecated_modify_breakpoint_hook = 0;

  deprecated_interactive_hook = 0;

  deprecated_readline_begin_hook = 0;

  deprecated_readline_hook = 0;

  deprecated_readline_end_hook = 0;

  deprecated_register_changed_hook = 0;

  deprecated_memory_changed_hook = 0;

  deprecated_context_hook = 0;

  deprecated_target_wait_hook = 0;

  deprecated_call_command_hook = 0;

  deprecated_error_hook = 0;

  deprecated_error_begin_hook = 0;

  deprecated_show_load_progress = mi_load_progress;

#endif

  /* Turn off 8 bit strings in quoted output.  Any character with the

     high bit set is printed using C's octal format. */

  sevenbit_strings = 1;

  /* Tell the world that we're alive */

  fputs_unfiltered ("(gdb) \n", raw_stdout);

  gdb_flush (raw_stdout);

  start_event_loop ();

}

extern initialize_file_ftype _initialize_mi_interp; /* -Wmissing-prototypes */

void

_initialize_mi_interp (void)

{

  static const struct interp_procs procs =

  {

    mi_interpreter_init,        /* init_proc */

    mi_interpreter_resume,      /* resume_proc */

    mi_interpreter_suspend,     /* suspend_proc */

    mi_interpreter_exec,        /* exec_proc */

    mi_interpreter_prompt_p     /* prompt_proc_p */

  };

  /* The various interpreter levels.  */

  interp_add (interp_new (INTERP_MI1, NULL, mi_out_new (1), &procs));

  interp_add (interp_new (INTERP_MI2, NULL, mi_out_new (2), &procs));

  interp_add (interp_new (INTERP_MI3, NULL, mi_out_new (3), &procs));

  /* "mi" selects the most recent released version.  "mi2" was

     released as part of GDB 6.0.  */

  interp_add (interp_new (INTERP_MI, NULL, mi_out_new (2), &procs));

}