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/* Top level stuff for GDB, the GNU debugger.

   Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,

   1996, 1997, 1998, 1999, 2000, 2001, 2002

   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 "top.h"

#include "target.h"

#include "inferior.h"

#include "symfile.h"

#include "gdbcore.h"

#include "getopt.h"

#include <sys/types.h>

#include "gdb_stat.h"

#include <ctype.h>

#include "gdb_string.h"

#include "event-loop.h"

#include "ui-out.h"

#include "main.h"

/* If nonzero, display time usage both at startup and for each command.  */

int display_time;

/* If nonzero, display space usage both at startup and for each command.  */

int display_space;

/* Whether this is the async version or not.  The async version is

   invoked on the command line with the -nw --async options.  In this

   version, the usual command_loop is substituted by and event loop which

   processes UI events asynchronously. */

int event_loop_p = 1;

/* Has an interpreter been specified and if so, which. */

char *interpreter_p;

/* Whether this is the command line version or not */

int tui_version = 0;

/* Whether xdb commands will be handled */

int xdb_commands = 0;

/* Whether dbx commands will be handled */

int dbx_commands = 0;

struct ui_file *gdb_stdout;

struct ui_file *gdb_stderr;

struct ui_file *gdb_stdlog;

struct ui_file *gdb_stdtarg;

/* Used to initialize error() - defined in utils.c */

extern void error_init (void);

/* Whether to enable writing into executable and core files */

extern int write_files;

static void print_gdb_help (struct ui_file *);

/* These two are used to set the external editor commands when gdb is farming

   out files to be edited by another program. */

extern char *external_editor_command;

/* Call command_loop.  If it happens to return, pass that through as a

   non-zero return status. */

static int

captured_command_loop (void *data)

{

  if (command_loop_hook == NULL)

    command_loop ();

  else

    command_loop_hook ();

  /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton

     would clean things up (restoring the cleanup chain) to the state

     they were just prior to the call.  Technically, this means that

     the do_cleanups() below is redundant.  Unfortunately, many FUNCs

     are not that well behaved.  do_cleanups should either be replaced

     with a do_cleanups call (to cover the problem) or an assertion

     check to detect bad FUNCs code. */

  do_cleanups (ALL_CLEANUPS);

  /* If the command_loop returned, normally (rather than threw an

     error) we try to quit. If the quit is aborted, catch_errors()

     which called this catch the signal and restart the command

     loop. */

  quit_command (NULL, instream == stdin);

  return 1;

}

static int

captured_main (void *data)

{

  struct captured_main_args *context = data;

  int argc = context->argc;

  char **argv = context->argv;

  int count;

  static int quiet = 0;

  static int batch = 0;

  static int set_args = 0;

  /* Pointers to various arguments from command line.  */

  char *symarg = NULL;

  char *execarg = NULL;

  char *corearg = NULL;

  char *cdarg = NULL;

  char *ttyarg = NULL;

  /* These are static so that we can take their address in an initializer.  */

  static int print_help;

  static int print_version;

  /* Pointers to all arguments of --command option.  */

  char **cmdarg;

  /* Allocated size of cmdarg.  */

  int cmdsize;

  /* Number of elements of cmdarg used.  */

  int ncmd;

  /* Indices of all arguments of --directory option.  */

  char **dirarg;

  /* Allocated size.  */

  int dirsize;

  /* Number of elements used.  */

  int ndir;

  struct stat homebuf, cwdbuf;

  char *homedir, *homeinit;

  register int i;

  long time_at_startup = get_run_time ();

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)

  setlocale (LC_MESSAGES, "");

#endif

#if defined (HAVE_SETLOCALE)

  setlocale (LC_CTYPE, "");

#endif

  bindtextdomain (PACKAGE, LOCALEDIR);

  textdomain (PACKAGE);

  START_PROGRESS (argv[0], 0);

#ifdef MPW

  /* Do all Mac-specific setup. */

  mac_init ();

#endif /* MPW */

  /* This needs to happen before the first use of malloc.  */

  init_malloc ((PTR) NULL);

#if defined (ALIGN_STACK_ON_STARTUP)

  i = (int) &count & 0x3;

  if (i != 0)

    alloca (4 - i);

#endif

  cmdsize = 1;

  cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));

  ncmd = 0;

  dirsize = 1;

  dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));

  ndir = 0;

  quit_flag = 0;

  line = (char *) xmalloc (linesize);

  line[0] = '\0';                /* Terminate saved (now empty) cmd line */

  instream = stdin;

  getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));

  current_directory = gdb_dirbuf;

  gdb_stdout = stdio_fileopen (stdout);

  gdb_stderr = stdio_fileopen (stderr);

  gdb_stdlog = gdb_stderr;      /* for moment */

  gdb_stdtarg = gdb_stderr;     /* for moment */

  /* initialize error() */

  error_init ();

  /* Parse arguments and options.  */

  {

    int c;

    /* When var field is 0, use flag field to record the equivalent

       short option (or arbitrary numbers starting at 10 for those

       with no equivalent).  */

    static struct option long_options[] =

    {

      {"async", no_argument, &event_loop_p, 1},

      {"noasync", no_argument, &event_loop_p, 0},

#if defined(TUI)

      {"tui", no_argument, &tui_version, 1},

#endif

      {"xdb", no_argument, &xdb_commands, 1},

      {"dbx", no_argument, &dbx_commands, 1},

      {"readnow", no_argument, &readnow_symbol_files, 1},

      {"r", no_argument, &readnow_symbol_files, 1},

      {"mapped", no_argument, &mapped_symbol_files, 1},

      {"m", no_argument, &mapped_symbol_files, 1},

      {"quiet", no_argument, &quiet, 1},

      {"q", no_argument, &quiet, 1},

      {"silent", no_argument, &quiet, 1},

      {"nx", no_argument, &inhibit_gdbinit, 1},

      {"n", no_argument, &inhibit_gdbinit, 1},

      {"batch", no_argument, &batch, 1},

      {"epoch", no_argument, &epoch_interface, 1},

    /* This is a synonym for "--annotate=1".  --annotate is now preferred,

       but keep this here for a long time because people will be running

       emacses which use --fullname.  */

      {"fullname", no_argument, 0, 'f'},

      {"f", no_argument, 0, 'f'},

      {"annotate", required_argument, 0, 12},

      {"help", no_argument, &print_help, 1},

      {"se", required_argument, 0, 10},

      {"symbols", required_argument, 0, 's'},

      {"s", required_argument, 0, 's'},

      {"exec", required_argument, 0, 'e'},

      {"e", required_argument, 0, 'e'},

      {"core", required_argument, 0, 'c'},

      {"c", required_argument, 0, 'c'},

      {"pid", required_argument, 0, 'p'},

      {"p", required_argument, 0, 'p'},

      {"command", required_argument, 0, 'x'},

      {"version", no_argument, &print_version, 1},

      {"x", required_argument, 0, 'x'},

#ifdef GDBTK

      {"tclcommand", required_argument, 0, 'z'},

      {"enable-external-editor", no_argument, 0, 'y'},

      {"editor-command", required_argument, 0, 'w'},

#endif

      {"ui", required_argument, 0, 'i'},

      {"interpreter", required_argument, 0, 'i'},

      {"i", required_argument, 0, 'i'},

      {"directory", required_argument, 0, 'd'},

      {"d", required_argument, 0, 'd'},

      {"cd", required_argument, 0, 11},

      {"tty", required_argument, 0, 't'},

      {"baud", required_argument, 0, 'b'},

      {"b", required_argument, 0, 'b'},

      {"nw", no_argument, &use_windows, 0},

      {"nowindows", no_argument, &use_windows, 0},

      {"w", no_argument, &use_windows, 1},

      {"windows", no_argument, &use_windows, 1},

      {"statistics", no_argument, 0, 13},

      {"write", no_argument, &write_files, 1},

      {"args", no_argument, &set_args, 1},

/* Allow machine descriptions to add more options... */

#ifdef ADDITIONAL_OPTIONS

      ADDITIONAL_OPTIONS

#endif

      {0, no_argument, 0, 0}

    };

    while (1)

      {

        int option_index;

        c = getopt_long_only (argc, argv, "",

                              long_options, &option_index);

        if (c == EOF || set_args)

          break;

        /* Long option that takes an argument.  */

        if (c == 0 && long_options[option_index].flag == 0)

          c = long_options[option_index].val;

        switch (c)

          {

          case 0:

            /* Long option that just sets a flag.  */

            break;

          case 10:

            symarg = optarg;

            execarg = optarg;

            break;

          case 11:

            cdarg = optarg;

            break;

          case 12:

            /* FIXME: what if the syntax is wrong (e.g. not digits)?  */

            annotation_level = atoi (optarg);

            break;

          case 13:

            /* Enable the display of both time and space usage.  */

            display_time = 1;

            display_space = 1;

            break;

          case 'f':

            annotation_level = 1;

/* We have probably been invoked from emacs.  Disable window interface.  */

            use_windows = 0;

            break;

          case 's':

            symarg = optarg;

            break;

          case 'e':

            execarg = optarg;

            break;

          case 'c':

            corearg = optarg;

            break;

          case 'p':

            /* "corearg" is shared by "--core" and "--pid" */

            corearg = optarg;

            break;

          case 'x':

            cmdarg[ncmd++] = optarg;

            if (ncmd >= cmdsize)

              {

                cmdsize *= 2;

                cmdarg = (char **) xrealloc ((char *) cmdarg,

                                             cmdsize * sizeof (*cmdarg));

              }

            break;

#ifdef GDBTK

          case 'z':

            {

extern int gdbtk_test (char *);

              if (!gdbtk_test (optarg))

                {

                  fprintf_unfiltered (gdb_stderr, _("%s: unable to load tclcommand file \"%s\""),

                                      argv[0], optarg);

                  exit (1);

                }

              break;

            }

          case 'y':

            /* Backwards compatibility only.  */

            break;

          case 'w':

            {

              external_editor_command = xstrdup (optarg);

              break;

            }

#endif /* GDBTK */

          case 'i':

            interpreter_p = optarg;

            break;

          case 'd':

            dirarg[ndir++] = optarg;

            if (ndir >= dirsize)

              {

                dirsize *= 2;

                dirarg = (char **) xrealloc ((char *) dirarg,

                                             dirsize * sizeof (*dirarg));

              }

            break;

          case 't':

            ttyarg = optarg;

            break;

          case 'q':

            quiet = 1;

            break;

          case 'b':

            {

              int i;

              char *p;

              i = strtol (optarg, &p, 0);

              if (i == 0 && p == optarg)

                /* Don't use *_filtered or warning() (which relies on

                   current_target) until after initialize_all_files(). */

                fprintf_unfiltered

                  (gdb_stderr,

                   _("warning: could not set baud rate to `%s'.\n"), optarg);

              else

                baud_rate = i;

            }

            break;

          case 'l':

            {

              int i;

              char *p;

              i = strtol (optarg, &p, 0);

              if (i == 0 && p == optarg)

                /* Don't use *_filtered or warning() (which relies on

                   current_target) until after initialize_all_files(). */

                fprintf_unfiltered

                  (gdb_stderr,

                 _("warning: could not set timeout limit to `%s'.\n"), optarg);

              else

                remote_timeout = i;

            }

            break;

#ifdef ADDITIONAL_OPTION_CASES

            ADDITIONAL_OPTION_CASES

#endif

          case '?':

            fprintf_unfiltered (gdb_stderr,

                        _("Use `%s --help' for a complete list of options.\n"),

                                argv[0]);

            exit (1);

          }

      }

    /* If --help or --version, disable window interface.  */

    if (print_help || print_version)

      {

        use_windows = 0;

#ifdef TUI

        /* Disable the TUI as well.  */

        tui_version = 0;

#endif

      }

#ifdef TUI

    /* An explicit --tui flag overrides the default UI, which is the

       window system.  */

    if (tui_version)

      use_windows = 0;

#endif

    if (set_args)

      {

        /* The remaining options are the command-line options for the

           inferior.  The first one is the sym/exec file, and the rest

           are arguments.  */

        if (optind >= argc)

          {

            fprintf_unfiltered (gdb_stderr,

                                _("%s: `--args' specified but no program specified\n"),

                                argv[0]);

            exit (1);

          }

        symarg = argv[optind];

        execarg = argv[optind];

        ++optind;

        set_inferior_args_vector (argc - optind, &argv[optind]);

      }

    else

      {

        /* OK, that's all the options.  The other arguments are filenames.  */

        count = 0;

        for (; optind < argc; optind++)

          switch (++count)

            {

            case 1:

              symarg = argv[optind];

              execarg = argv[optind];

              break;

            case 2:

              /* The documentation says this can be a "ProcID" as well.

                 We will try it as both a corefile and a pid.  */

              corearg = argv[optind];

              break;

            case 3:

              fprintf_unfiltered (gdb_stderr,

                                  _("Excess command line arguments ignored. (%s%s)\n"),

                                  argv[optind], (optind == argc - 1) ? "" : " ...");

              break;

            }

      }

    if (batch)

      quiet = 1;

  }

  /* Initialize all files.  Give the interpreter a chance to take

     control of the console via the init_ui_hook()) */

  gdb_init (argv[0]);

  /* Do these (and anything which might call wrap_here or *_filtered)

     after initialize_all_files.  */

  if (print_version)

    {

      print_gdb_version (gdb_stdout);

      wrap_here ("");

      printf_filtered ("\n");

      exit (0);

    }

  if (print_help)

    {

      print_gdb_help (gdb_stdout);

      fputs_unfiltered ("\n", gdb_stdout);

      exit (0);

    }

  if (!quiet)

    {

      /* Print all the junk at the top, with trailing "..." if we are about

         to read a symbol file (possibly slowly).  */

      print_gdb_version (gdb_stdout);

      if (symarg)

        printf_filtered ("..");

      wrap_here ("");

      gdb_flush (gdb_stdout);   /* Force to screen during slow operations */

    }

  error_pre_print = "\n\n";

  quit_pre_print = error_pre_print;

  /* We may get more than one warning, don't double space all of them... */

  warning_pre_print = _("\nwarning: ");

  /* Read and execute $HOME/.gdbinit file, if it exists.  This is done

     *before* all the command line arguments are processed; it sets

     global parameters, which are independent of what file you are

     debugging or what directory you are in.  */

  homedir = getenv ("HOME");

  if (homedir)

    {

      homeinit = (char *) alloca (strlen (homedir) +

                                  strlen (gdbinit) + 10);

      strcpy (homeinit, homedir);

      strcat (homeinit, "/");

      strcat (homeinit, gdbinit);

      if (!inhibit_gdbinit)

        {

          catch_command_errors (source_command, homeinit, 0, RETURN_MASK_ALL);

        }

      /* Do stats; no need to do them elsewhere since we'll only

         need them if homedir is set.  Make sure that they are

         zero in case one of them fails (this guarantees that they

         won't match if either exists).  */

      memset (&homebuf, 0, sizeof (struct stat));

      memset (&cwdbuf, 0, sizeof (struct stat));

      stat (homeinit, &homebuf);

      stat (gdbinit, &cwdbuf);  /* We'll only need this if

                                   homedir was set.  */

    }

  /* Now perform all the actions indicated by the arguments.  */

  if (cdarg != NULL)

    {

      catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);

    }

  for (i = 0; i < ndir; i++)

    catch_command_errors (directory_command, dirarg[i], 0, RETURN_MASK_ALL);

  xfree (dirarg);

  if (execarg != NULL

      && symarg != NULL

      && STREQ (execarg, symarg))

    {

      /* The exec file and the symbol-file are the same.  If we can't

         open it, better only print one error message.

         catch_command_errors returns non-zero on success! */

      if (catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL))

        catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);

    }

  else

    {

      if (execarg != NULL)

        catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL);

      if (symarg != NULL)

        catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);

    }

  /* After the symbol file has been read, print a newline to get us

     beyond the copyright line...  But errors should still set off

     the error message with a (single) blank line.  */

  if (!quiet)

    printf_filtered ("\n");

  error_pre_print = "\n";

  quit_pre_print = error_pre_print;

  warning_pre_print = _("\nwarning: ");

  if (corearg != NULL)

    {

      /* corearg may be either a corefile or a pid.

         If its first character is a digit, try attach first

         and then corefile.  Otherwise try corefile first. */

      if (isdigit (corearg[0]))

        {

          if (catch_command_errors (attach_command, corearg,

                                    !batch, RETURN_MASK_ALL) == 0)

            catch_command_errors (core_file_command, corearg,

                                  !batch, RETURN_MASK_ALL);

        }

      else /* Can't be a pid, better be a corefile. */

        catch_command_errors (core_file_command, corearg,

                              !batch, RETURN_MASK_ALL);

    }

  if (ttyarg != NULL)

    catch_command_errors (tty_command, ttyarg, !batch, RETURN_MASK_ALL);

#ifdef ADDITIONAL_OPTION_HANDLER

  ADDITIONAL_OPTION_HANDLER;

#endif

  /* Error messages should no longer be distinguished with extra output. */

  error_pre_print = NULL;

  quit_pre_print = NULL;

  warning_pre_print = _("warning: ");

  /* Read the .gdbinit file in the current directory, *if* it isn't

     the same as the $HOME/.gdbinit file (it should exist, also).  */

  if (!homedir

      || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))

    if (!inhibit_gdbinit)

      {

        catch_command_errors (source_command, gdbinit, 0, RETURN_MASK_ALL);

      }

  for (i = 0; i < ncmd; i++)

    {

#if 0

      /* NOTE: cagney/1999-11-03: SET_TOP_LEVEL() was a macro that

         expanded into a call to setjmp().  */

      if (!SET_TOP_LEVEL ()) /* NB: This is #if 0'd out */

        {

          /* NOTE: I am commenting this out, because it is not clear

             where this feature is used. It is very old and

             undocumented. ezannoni: 1999-05-04 */

#if 0

          if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')

            read_command_file (stdin);

          else

#endif

            source_command (cmdarg[i], !batch);

          do_cleanups (ALL_CLEANUPS);

        }

#endif

      catch_command_errors (source_command, cmdarg[i], !batch, RETURN_MASK_ALL);

    }

  xfree (cmdarg);

  /* Read in the old history after all the command files have been read. */

  init_history ();

  if (batch)

    {

      /* We have hit the end of the batch file.  */

      exit (0);

    }

  /* Do any host- or target-specific hacks.  This is used for i960 targets

     to force the user to set a nindy target and spec its parameters.  */

#ifdef BEFORE_MAIN_LOOP_HOOK

  BEFORE_MAIN_LOOP_HOOK;

#endif