651 lines
17 KiB
C
651 lines
17 KiB
C
/* Top level stuff for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
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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, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include <setjmp.h>
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#include "top.h"
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#include "target.h"
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#include "inferior.h"
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#include "call-cmds.h"
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#include "gdbcore.h"
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#include "getopt.h"
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#include <sys/types.h>
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#include "gdb_stat.h"
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#include <ctype.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "gdb_string.h"
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/* Temporary variable for SET_TOP_LEVEL. */
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static int top_level_val;
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/* Do a setjmp on error_return and quit_return. catch_errors is
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generally a cleaner way to do this, but main() would look pretty
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ugly if it had to use catch_errors each time. */
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#define SET_TOP_LEVEL() \
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(((top_level_val = SIGSETJMP (error_return)) \
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? (PTR) 0 : (PTR) memcpy (quit_return, error_return, sizeof (SIGJMP_BUF))) \
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, top_level_val)
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/* If nonzero, display time usage both at startup and for each command. */
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int display_time;
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/* If nonzero, display space usage both at startup and for each command. */
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int display_space;
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static void print_gdb_help PARAMS ((GDB_FILE *));
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extern void gdb_init PARAMS ((char *));
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int count;
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static int quiet = 0;
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static int batch = 0;
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/* Pointers to various arguments from command line. */
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char *symarg = NULL;
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char *execarg = NULL;
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char *corearg = NULL;
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char *cdarg = NULL;
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char *ttyarg = NULL;
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/* These are static so that we can take their address in an initializer. */
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static int print_help;
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static int print_version;
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/* Pointers to all arguments of --command option. */
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char **cmdarg;
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/* Allocated size of cmdarg. */
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int cmdsize;
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/* Number of elements of cmdarg used. */
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int ncmd;
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/* Indices of all arguments of --directory option. */
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char **dirarg;
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/* Allocated size. */
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int dirsize;
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/* Number of elements used. */
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int ndir;
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struct stat homebuf, cwdbuf;
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char *homedir, *homeinit;
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register int i;
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long time_at_startup = get_run_time ();
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START_PROGRESS (argv[0], 0);
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#ifdef MPW
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/* Do all Mac-specific setup. */
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mac_init ();
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#endif /* MPW */
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/* This needs to happen before the first use of malloc. */
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init_malloc ((PTR) NULL);
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#if defined (ALIGN_STACK_ON_STARTUP)
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i = (int) &count & 0x3;
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if (i != 0)
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alloca (4 - i);
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#endif
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/* If error() is called from initialization code, just exit */
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if (SET_TOP_LEVEL ()) {
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exit(1);
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}
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cmdsize = 1;
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cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));
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ncmd = 0;
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dirsize = 1;
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dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
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ndir = 0;
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quit_flag = 0;
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line = (char *) xmalloc (linesize);
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line[0] = '\0'; /* Terminate saved (now empty) cmd line */
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instream = stdin;
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getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
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current_directory = gdb_dirbuf;
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/* Parse arguments and options. */
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{
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int c;
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/* When var field is 0, use flag field to record the equivalent
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short option (or arbitrary numbers starting at 10 for those
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with no equivalent). */
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static struct option long_options[] =
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{
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{"readnow", no_argument, &readnow_symbol_files, 1},
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{"r", no_argument, &readnow_symbol_files, 1},
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{"mapped", no_argument, &mapped_symbol_files, 1},
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{"m", no_argument, &mapped_symbol_files, 1},
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{"quiet", no_argument, &quiet, 1},
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{"q", no_argument, &quiet, 1},
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{"silent", no_argument, &quiet, 1},
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{"nx", no_argument, &inhibit_gdbinit, 1},
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{"n", no_argument, &inhibit_gdbinit, 1},
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{"batch", no_argument, &batch, 1},
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{"epoch", no_argument, &epoch_interface, 1},
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/* This is a synonym for "--annotate=1". --annotate is now preferred,
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but keep this here for a long time because people will be running
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emacses which use --fullname. */
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{"fullname", no_argument, 0, 'f'},
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{"f", no_argument, 0, 'f'},
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{"annotate", required_argument, 0, 12},
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{"help", no_argument, &print_help, 1},
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{"se", required_argument, 0, 10},
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{"symbols", required_argument, 0, 's'},
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{"s", required_argument, 0, 's'},
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{"exec", required_argument, 0, 'e'},
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{"e", required_argument, 0, 'e'},
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{"core", required_argument, 0, 'c'},
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{"c", required_argument, 0, 'c'},
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{"command", required_argument, 0, 'x'},
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{"version", no_argument, &print_version, 1},
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{"x", required_argument, 0, 'x'},
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{"directory", required_argument, 0, 'd'},
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{"cd", required_argument, 0, 11},
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{"tty", required_argument, 0, 't'},
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{"baud", required_argument, 0, 'b'},
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{"b", required_argument, 0, 'b'},
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{"nw", no_argument, &use_windows, 0},
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{"nowindows", no_argument, &use_windows, 0},
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{"w", no_argument, &use_windows, 1},
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{"windows", no_argument, &use_windows, 1},
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{"statistics", no_argument, 0, 13},
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{"write", no_argument, &write_files, 1},
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/* Allow machine descriptions to add more options... */
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#ifdef ADDITIONAL_OPTIONS
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ADDITIONAL_OPTIONS
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#endif
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{0, no_argument, 0, 0}
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};
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while (1)
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{
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int option_index;
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c = getopt_long_only (argc, argv, "",
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long_options, &option_index);
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if (c == EOF)
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break;
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/* Long option that takes an argument. */
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if (c == 0 && long_options[option_index].flag == 0)
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c = long_options[option_index].val;
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switch (c)
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{
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case 0:
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/* Long option that just sets a flag. */
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break;
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case 10:
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symarg = optarg;
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execarg = optarg;
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break;
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case 11:
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cdarg = optarg;
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break;
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case 12:
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/* FIXME: what if the syntax is wrong (e.g. not digits)? */
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annotation_level = atoi (optarg);
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break;
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case 13:
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/* Enable the display of both time and space usage. */
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display_time = 1;
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display_space = 1;
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break;
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case 'f':
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annotation_level = 1;
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/* We have probably been invoked from emacs. Disable window interface. */
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use_windows = 0;
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break;
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case 's':
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symarg = optarg;
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break;
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case 'e':
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execarg = optarg;
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break;
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case 'c':
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corearg = optarg;
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break;
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case 'x':
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cmdarg[ncmd++] = optarg;
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if (ncmd >= cmdsize)
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{
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cmdsize *= 2;
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cmdarg = (char **) xrealloc ((char *)cmdarg,
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cmdsize * sizeof (*cmdarg));
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}
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break;
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case 'd':
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dirarg[ndir++] = optarg;
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if (ndir >= dirsize)
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{
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dirsize *= 2;
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dirarg = (char **) xrealloc ((char *)dirarg,
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dirsize * sizeof (*dirarg));
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}
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break;
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case 't':
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ttyarg = optarg;
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break;
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case 'q':
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quiet = 1;
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break;
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case 'b':
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{
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int i;
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char *p;
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i = strtol (optarg, &p, 0);
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if (i == 0 && p == optarg)
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/* Don't use *_filtered or warning() (which relies on
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current_target) until after initialize_all_files(). */
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fprintf_unfiltered
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(gdb_stderr,
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"warning: could not set baud rate to `%s'.\n", optarg);
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else
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baud_rate = i;
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}
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case 'l':
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{
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int i;
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char *p;
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i = strtol (optarg, &p, 0);
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if (i == 0 && p == optarg)
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/* Don't use *_filtered or warning() (which relies on
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current_target) until after initialize_all_files(). */
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fprintf_unfiltered
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(gdb_stderr,
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"warning: could not set timeout limit to `%s'.\n", optarg);
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else
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remote_timeout = i;
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}
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break;
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#ifdef ADDITIONAL_OPTION_CASES
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ADDITIONAL_OPTION_CASES
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#endif
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case '?':
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fprintf_unfiltered (gdb_stderr,
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"Use `%s --help' for a complete list of options.\n",
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argv[0]);
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exit (1);
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}
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}
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/* If --help or --version, disable window interface. */
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if (print_help || print_version)
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use_windows = 0;
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/* OK, that's all the options. The other arguments are filenames. */
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count = 0;
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for (; optind < argc; optind++)
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switch (++count)
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{
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case 1:
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symarg = argv[optind];
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execarg = argv[optind];
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break;
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case 2:
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corearg = argv[optind];
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break;
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case 3:
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fprintf_unfiltered (gdb_stderr,
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"Excess command line arguments ignored. (%s%s)\n",
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argv[optind], (optind == argc - 1) ? "" : " ...");
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break;
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}
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if (batch)
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quiet = 1;
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}
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gdb_init (argv[0]);
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/* Do these (and anything which might call wrap_here or *_filtered)
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after initialize_all_files. */
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if (print_version)
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{
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print_gdb_version (gdb_stdout);
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wrap_here ("");
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printf_filtered ("\n");
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exit (0);
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}
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if (print_help)
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{
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print_gdb_help (gdb_stdout);
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fputs_unfiltered ("\n", gdb_stdout);
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exit (0);
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}
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if (!quiet)
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{
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/* Print all the junk at the top, with trailing "..." if we are about
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to read a symbol file (possibly slowly). */
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print_gdb_version (gdb_stdout);
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if (symarg)
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printf_filtered ("..");
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wrap_here("");
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gdb_flush (gdb_stdout); /* Force to screen during slow operations */
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}
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error_pre_print = "\n\n";
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quit_pre_print = error_pre_print;
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/* We may get more than one warning, don't double space all of them... */
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warning_pre_print = "\nwarning: ";
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/* Read and execute $HOME/.gdbinit file, if it exists. This is done
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*before* all the command line arguments are processed; it sets
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global parameters, which are independent of what file you are
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debugging or what directory you are in. */
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homedir = getenv ("HOME");
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if (homedir)
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{
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homeinit = (char *) alloca (strlen (getenv ("HOME")) +
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strlen (gdbinit) + 10);
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strcpy (homeinit, getenv ("HOME"));
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strcat (homeinit, "/");
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strcat (homeinit, gdbinit);
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if (!inhibit_gdbinit)
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{
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if (!SET_TOP_LEVEL ())
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source_command (homeinit, 0);
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}
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do_cleanups (ALL_CLEANUPS);
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/* Do stats; no need to do them elsewhere since we'll only
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need them if homedir is set. Make sure that they are
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zero in case one of them fails (this guarantees that they
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won't match if either exists). */
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memset (&homebuf, 0, sizeof (struct stat));
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memset (&cwdbuf, 0, sizeof (struct stat));
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stat (homeinit, &homebuf);
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stat (gdbinit, &cwdbuf); /* We'll only need this if
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homedir was set. */
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}
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/* Now perform all the actions indicated by the arguments. */
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if (cdarg != NULL)
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{
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if (!SET_TOP_LEVEL ())
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{
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cd_command (cdarg, 0);
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}
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}
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do_cleanups (ALL_CLEANUPS);
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for (i = 0; i < ndir; i++)
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if (!SET_TOP_LEVEL ())
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directory_command (dirarg[i], 0);
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free ((PTR)dirarg);
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do_cleanups (ALL_CLEANUPS);
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if (execarg != NULL
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&& symarg != NULL
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&& STREQ (execarg, symarg))
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{
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/* The exec file and the symbol-file are the same. If we can't open
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it, better only print one error message. */
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if (!SET_TOP_LEVEL ())
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{
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exec_file_command (execarg, !batch);
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symbol_file_command (symarg, 0);
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}
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}
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else
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{
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if (execarg != NULL)
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if (!SET_TOP_LEVEL ())
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exec_file_command (execarg, !batch);
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if (symarg != NULL)
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if (!SET_TOP_LEVEL ())
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symbol_file_command (symarg, 0);
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}
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do_cleanups (ALL_CLEANUPS);
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/* After the symbol file has been read, print a newline to get us
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beyond the copyright line... But errors should still set off
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the error message with a (single) blank line. */
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if (!quiet)
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printf_filtered ("\n");
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error_pre_print = "\n";
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quit_pre_print = error_pre_print;
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warning_pre_print = "\nwarning: ";
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if (corearg != NULL)
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if (!SET_TOP_LEVEL ())
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core_file_command (corearg, !batch);
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else if (isdigit (corearg[0]) && !SET_TOP_LEVEL ())
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attach_command (corearg, !batch);
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do_cleanups (ALL_CLEANUPS);
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if (ttyarg != NULL)
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if (!SET_TOP_LEVEL ())
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tty_command (ttyarg, !batch);
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do_cleanups (ALL_CLEANUPS);
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#ifdef ADDITIONAL_OPTION_HANDLER
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ADDITIONAL_OPTION_HANDLER;
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#endif
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/* Error messages should no longer be distinguished with extra output. */
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error_pre_print = NULL;
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quit_pre_print = NULL;
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warning_pre_print = "warning: ";
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/* Read the .gdbinit file in the current directory, *if* it isn't
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the same as the $HOME/.gdbinit file (it should exist, also). */
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if (!homedir
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|| memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
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if (!inhibit_gdbinit)
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{
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if (!SET_TOP_LEVEL ())
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source_command (gdbinit, 0);
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}
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do_cleanups (ALL_CLEANUPS);
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for (i = 0; i < ncmd; i++)
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{
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if (!SET_TOP_LEVEL ())
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{
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if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')
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read_command_file (stdin);
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else
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source_command (cmdarg[i], !batch);
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do_cleanups (ALL_CLEANUPS);
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}
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}
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free ((PTR)cmdarg);
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/* Read in the old history after all the command files have been read. */
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init_history();
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if (batch)
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{
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/* We have hit the end of the batch file. */
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exit (0);
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}
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/* Do any host- or target-specific hacks. This is used for i960 targets
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to force the user to set a nindy target and spec its parameters. */
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#ifdef BEFORE_MAIN_LOOP_HOOK
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BEFORE_MAIN_LOOP_HOOK;
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#endif
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END_PROGRESS (argv[0]);
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/* Show time and/or space usage. */
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if (display_time)
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{
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long init_time = get_run_time () - time_at_startup;
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printf_unfiltered ("Startup time: %ld.%06ld\n",
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init_time / 1000000, init_time % 1000000);
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}
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if (display_space)
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{
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#ifdef HAVE_SBRK
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extern char **environ;
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char *lim = (char *) sbrk (0);
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printf_unfiltered ("Startup size: data size %ld\n",
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(long) (lim - (char *) &environ));
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#endif
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}
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/* The default command loop.
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The WIN32 Gui calls this main to set up gdb's state, and
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has its own command loop. */
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||
#if !defined _WIN32 || defined __GNUC__
|
||
while (1)
|
||
{
|
||
if (!SET_TOP_LEVEL ())
|
||
{
|
||
do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */
|
||
/* GUIs generally have their own command loop, mainloop, or whatever.
|
||
This is a good place to gain control because many error
|
||
conditions will end up here via longjmp(). */
|
||
if (command_loop_hook)
|
||
command_loop_hook ();
|
||
else
|
||
command_loop ();
|
||
quit_command ((char *)0, instream == stdin);
|
||
}
|
||
}
|
||
|
||
/* No exit -- exit is through quit_command. */
|
||
#endif
|
||
|
||
}
|
||
|
||
/* Don't use *_filtered for printing help. We don't want to prompt
|
||
for continue no matter how small the screen or how much we're going
|
||
to print. */
|
||
|
||
static void
|
||
print_gdb_help (stream)
|
||
GDB_FILE *stream;
|
||
{
|
||
fputs_unfiltered ("\
|
||
This is the GNU debugger. Usage:\n\n\
|
||
gdb [options] [executable-file [core-file or process-id]]\n\n\
|
||
Options:\n\n\
|
||
", stream);
|
||
fputs_unfiltered ("\
|
||
-b BAUDRATE Set serial port baud rate used for remote debugging.\n\
|
||
--batch Exit after processing options.\n\
|
||
--cd=DIR Change current directory to DIR.\n\
|
||
--command=FILE Execute GDB commands from FILE.\n\
|
||
--core=COREFILE Analyze the core dump COREFILE.\n\
|
||
", stream);
|
||
fputs_unfiltered ("\
|
||
--directory=DIR Search for source files in DIR.\n\
|
||
--epoch Output information used by epoch emacs-GDB interface.\n\
|
||
--exec=EXECFILE Use EXECFILE as the executable.\n\
|
||
--fullname Output information used by emacs-GDB interface.\n\
|
||
--help Print this message.\n\
|
||
", stream);
|
||
fputs_unfiltered ("\
|
||
--mapped Use mapped symbol files if supported on this system.\n\
|
||
--nw Do not use a window interface.\n\
|
||
--nx Do not read .gdbinit file.\n\
|
||
--quiet Do not print version number on startup.\n\
|
||
--readnow Fully read symbol files on first access.\n\
|
||
", stream);
|
||
fputs_unfiltered ("\
|
||
--se=FILE Use FILE as symbol file and executable file.\n\
|
||
--symbols=SYMFILE Read symbols from SYMFILE.\n\
|
||
--tty=TTY Use TTY for input/output by the program being debugged.\n\
|
||
--write Set writing into executable and core files.\n\
|
||
--version Print version information and then exit.\n\
|
||
", stream);
|
||
#ifdef ADDITIONAL_OPTION_HELP
|
||
fputs_unfiltered (ADDITIONAL_OPTION_HELP, stream);
|
||
#endif
|
||
fputs_unfiltered ("\n\
|
||
For more information, type \"help\" from within GDB, or consult the\n\
|
||
GDB manual (available as on-line info or a printed manual).\n\
|
||
Report bugs to \"bug-gdb@prep.ai.mit.edu\".\
|
||
", stream);
|
||
}
|
||
|
||
|
||
void
|
||
init_proc ()
|
||
{
|
||
}
|
||
|
||
void
|
||
proc_remove_foreign (pid)
|
||
int pid;
|
||
{
|
||
}
|
||
|
||
/* All I/O sent to the *_filtered and *_unfiltered functions eventually ends up
|
||
here. The fputs_unfiltered_hook is primarily used by GUIs to collect all
|
||
output and send it to the GUI, instead of the controlling terminal. Only
|
||
output to gdb_stdout and gdb_stderr are sent to the hook. Everything else
|
||
is sent on to fputs to allow file I/O to be handled appropriately. */
|
||
|
||
void
|
||
fputs_unfiltered (linebuffer, stream)
|
||
const char *linebuffer;
|
||
FILE *stream;
|
||
{
|
||
if (fputs_unfiltered_hook
|
||
&& (stream == gdb_stdout
|
||
|| stream == gdb_stderr))
|
||
fputs_unfiltered_hook (linebuffer, stream);
|
||
else
|
||
fputs (linebuffer, stream);
|
||
}
|