/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2013 Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "getopt.h"
#include <sys/types.h>
-#include "gdb_stat.h"
+#include <sys/stat.h>
#include <ctype.h>
-#include "gdb_string.h"
+#include <string.h>
#include "event-loop.h"
#include "ui-out.h"
#include "main.h"
#include "source.h"
#include "cli/cli-cmds.h"
-#include "python/python.h"
#include "objfiles.h"
#include "auto-load.h"
+#include "maint.h"
+
+#include "filenames.h"
+#include "filestuff.h"
+#include <signal.h>
/* The selected interpreter. This will be used as a set command
variable, so it should always be malloc'ed - since
/* GDB as it has been invoked from the command line (i.e. argv[0]). */
static char *gdb_program_name;
+/* Return read only pointer to GDB_PROGRAM_NAME. */
+const char *
+get_gdb_program_name (void)
+{
+ return gdb_program_name;
+}
+
static void print_gdb_help (struct ui_file *);
+/* Set the data-directory parameter to NEW_DATADIR.
+ If NEW_DATADIR is not a directory then a warning is printed.
+ We don't signal an error for backward compatibility. */
+
+void
+set_gdb_data_directory (const char *new_datadir)
+{
+ struct stat st;
+
+ if (stat (new_datadir, &st) < 0)
+ {
+ int save_errno = errno;
+
+ fprintf_unfiltered (gdb_stderr, "Warning: ");
+ print_sys_errmsg (new_datadir, save_errno);
+ }
+ else if (!S_ISDIR (st.st_mode))
+ warning (_("%s is not a directory."), new_datadir);
+
+ xfree (gdb_datadir);
+ gdb_datadir = gdb_realpath (new_datadir);
+
+ /* gdb_realpath won't return an absolute path if the path doesn't exist,
+ but we still want to record an absolute path here. If the user entered
+ "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
+ isn't canonical, but that's ok. */
+ if (!IS_ABSOLUTE_PATH (gdb_datadir))
+ {
+ char *abs_datadir = gdb_abspath (gdb_datadir);
+
+ xfree (gdb_datadir);
+ gdb_datadir = abs_datadir;
+ }
+}
+
/* Relocate a file or directory. PROGNAME is the name by which gdb
was invoked (i.e., argv[0]). INITIAL is the default value for the
file or directory. FLAG is true if the value is relocatable, false
to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
LOCAL_GDBINIT) is set to NULL. */
static void
-get_init_files (char **system_gdbinit,
- char **home_gdbinit,
- char **local_gdbinit)
+get_init_files (const char **system_gdbinit,
+ const char **home_gdbinit,
+ const char **local_gdbinit)
{
- static char *sysgdbinit = NULL;
+ static const char *sysgdbinit = NULL;
static char *homeinit = NULL;
- static char *localinit = NULL;
+ static const char *localinit = NULL;
static int initialized = 0;
if (!initialized)
has been provided, search for SYSTEM_GDBINIT there. */
if (gdb_datadir_provided
&& datadir_len < sys_gdbinit_len
- && strncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
- && strchr (SLASH_STRING, SYSTEM_GDBINIT[datadir_len]) != NULL)
+ && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
+ && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
{
/* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
to gdb_datadir. */
char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
char *p;
- for (p = tmp_sys_gdbinit; strchr (SLASH_STRING, *p); ++p)
+ for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
continue;
relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
NULL);
*local_gdbinit = localinit;
}
+/* Try to set up an alternate signal stack for SIGSEGV handlers.
+ This allows us to handle SIGSEGV signals generated when the
+ normal process stack is exhausted. If this stack is not set
+ up (sigaltstack is unavailable or fails) and a SIGSEGV is
+ generated when the normal stack is exhausted then the program
+ will behave as though no SIGSEGV handler was installed. */
+
+static void
+setup_alternate_signal_stack (void)
+{
+#ifdef HAVE_SIGALTSTACK
+ stack_t ss;
+
+ ss.ss_sp = xmalloc (SIGSTKSZ);
+ ss.ss_size = SIGSTKSZ;
+ ss.ss_flags = 0;
+
+ sigaltstack(&ss, NULL);
+#endif
+}
+
/* Call command_loop. If it happens to return, pass that through as a
non-zero return status. */
static int
captured_command_loop (void *data)
{
- /* Top-level execution commands can be run on the background from
+ /* Top-level execution commands can be run in the background from
here on. */
interpreter_async = 1;
initializer. */
static int print_help;
static int print_version;
+ static int print_configuration;
/* Pointers to all arguments of --command option. */
VEC (cmdarg_s) *cmdarg_vec = NULL;
int ndir;
/* gdb init files. */
- char *system_gdbinit;
- char *home_gdbinit;
- char *local_gdbinit;
+ const char *system_gdbinit;
+ const char *home_gdbinit;
+ const char *local_gdbinit;
int i;
int save_auto_load;
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
+ bfd_init ();
+ notice_open_fds ();
+
make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
dirsize = 1;
dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
saved_command_line[0] = '\0';
instream = stdin;
+#ifdef __MINGW32__
+ /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
+ as a Windows pipe, and Windows buffers on pipes. */
+ setvbuf (stderr, NULL, _IONBF, BUFSIZ);
+#endif
+
gdb_stdout = stdio_fileopen (stdout);
- gdb_stderr = stdio_fileopen (stderr);
+ gdb_stderr = stderr_fileopen ();
+
gdb_stdlog = gdb_stderr; /* for moment */
gdb_stdtarg = gdb_stderr; /* for moment */
gdb_stdin = stdio_fileopen (stdin);
gdb_stdtargerr = gdb_stderr; /* for moment */
gdb_stdtargin = gdb_stdin; /* for moment */
+#ifdef __MINGW32__
+ /* On Windows, argv[0] is not necessarily set to absolute form when
+ GDB is found along PATH, without which relocation doesn't work. */
+ gdb_program_name = windows_get_absolute_argv0 (argv[0]);
+#else
gdb_program_name = xstrdup (argv[0]);
+#endif
if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
/* Don't use *_filtered or warning() (which relies on
#ifdef RELOC_SRCDIR
add_substitute_path_rule (RELOC_SRCDIR,
- make_relative_prefix (argv[0], BINDIR,
+ make_relative_prefix (gdb_program_name, BINDIR,
RELOC_SRCDIR));
#endif
{"command", required_argument, 0, 'x'},
{"eval-command", required_argument, 0, 'X'},
{"version", no_argument, &print_version, 1},
+ {"configuration", no_argument, &print_configuration, 1},
{"x", required_argument, 0, 'x'},
{"ex", required_argument, 0, 'X'},
{"init-command", required_argument, 0, OPT_IX},
{"directory", required_argument, 0, 'd'},
{"d", required_argument, 0, 'd'},
{"data-directory", required_argument, 0, 'D'},
+ {"D", required_argument, 0, 'D'},
{"cd", required_argument, 0, OPT_CD},
{"tty", required_argument, 0, 't'},
{"baud", required_argument, 0, 'b'},
break;
case OPT_STATISTICS:
/* Enable the display of both time and space usage. */
- set_display_time (1);
- set_display_space (1);
+ set_per_command_time (1);
+ set_per_command_space (1);
break;
case OPT_TUI:
/* --tui is equivalent to -i=tui. */
xfree (interpreter_p);
interpreter_p = xstrdup (INTERP_INSIGHT);
#endif
- use_windows = 1;
break;
case OPT_NOWINDOWS:
/* -nw is equivalent to -i=console. */
xfree (interpreter_p);
interpreter_p = xstrdup (INTERP_CONSOLE);
- use_windows = 0;
break;
case 'f':
annotation_level = 1;
- /* We have probably been invoked from emacs. Disable
- window interface. */
- use_windows = 0;
break;
case 's':
symarg = optarg;
gdb_stdout = ui_file_new();
break;
case 'D':
- xfree (gdb_datadir);
- gdb_datadir = xstrdup (optarg);
+ if (optarg[0] == '\0')
+ {
+ fprintf_unfiltered (gdb_stderr,
+ _("%s: empty path for"
+ " `--data-directory'\n"),
+ argv[0]);
+ exit (1);
+ }
+ set_gdb_data_directory (optarg);
gdb_datadir_provided = 1;
break;
#ifdef GDBTK
}
}
- /* If --help or --version, disable window interface. */
- if (print_help || print_version)
- {
- use_windows = 0;
- }
-
if (batch_flag)
quiet = 1;
}
+ /* Try to set up an alternate signal stack for SIGSEGV handlers. */
+ setup_alternate_signal_stack ();
+
/* Initialize all files. Give the interpreter a chance to take
control of the console via the deprecated_init_ui_hook (). */
- gdb_init (argv[0]);
+ gdb_init (gdb_program_name);
/* Now that gdb_init has created the initial inferior, we're in
position to set args for that inferior. */
exit (0);
}
+ if (print_configuration)
+ {
+ print_gdb_configuration (gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("\n");
+ exit (0);
+ }
+
/* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
GDB retain the old MI1 interpreter startup behavior. Output the
copyright message before the interpreter is installed. That way
}
/* Set off error and warning messages with a blank line. */
- error_pre_print = "\n";
- quit_pre_print = error_pre_print;
warning_pre_print = _("\nwarning: ");
/* Read and execute the system-wide gdbinit file, if it exists.
processed; it sets global parameters, which are independent of
what file you are debugging or what directory you are in. */
if (system_gdbinit && !inhibit_gdbinit)
- catch_command_errors (source_script, system_gdbinit, 0, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, system_gdbinit,
+ 0, RETURN_MASK_ALL);
/* Read and execute $HOME/.gdbinit file, if it exists. This is done
*before* all the command line arguments are processed; it sets
debugging or what directory you are in. */
if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
- catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script,
+ home_gdbinit, 0, RETURN_MASK_ALL);
/* Process '-ix' and '-iex' options early. */
for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
switch (cmdarg_p->type)
{
case CMDARG_INIT_FILE:
- catch_command_errors (source_script, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, cmdarg_p->string,
+ !batch_flag, RETURN_MASK_ALL);
break;
case CMDARG_INIT_COMMAND:
catch_command_errors (execute_command, cmdarg_p->string,
catch_command_errors returns non-zero on success! */
if (catch_command_errors (exec_file_attach, execarg,
!batch_flag, RETURN_MASK_ALL))
- catch_command_errors (symbol_file_add_main, symarg,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors_const (symbol_file_add_main, symarg,
+ !batch_flag, RETURN_MASK_ALL);
}
else
{
catch_command_errors (exec_file_attach, execarg,
!batch_flag, RETURN_MASK_ALL);
if (symarg != NULL)
- catch_command_errors (symbol_file_add_main, symarg,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors_const (symbol_file_add_main, symarg,
+ !batch_flag, RETURN_MASK_ALL);
}
if (corearg && pidarg)
set_inferior_io_terminal (ttyarg);
/* 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
{
auto_load_local_gdbinit_loaded = 1;
- catch_command_errors (source_script, local_gdbinit, 0,
- RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, local_gdbinit, 0,
+ RETURN_MASK_ALL);
}
}
switch (cmdarg_p->type)
{
case CMDARG_FILE:
- catch_command_errors (source_script, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, cmdarg_p->string,
+ !batch_flag, RETURN_MASK_ALL);
break;
case CMDARG_COMMAND:
catch_command_errors (execute_command, cmdarg_p->string,
int
gdb_main (struct captured_main_args *args)
{
- use_windows = args->use_windows;
catch_errors (captured_main, args, "", RETURN_MASK_ALL);
/* The only way to end up here is by an error (normal exit is
handled by quit_force()), hence always return an error status. */
static void
print_gdb_help (struct ui_file *stream)
{
- char *system_gdbinit;
- char *home_gdbinit;
- char *local_gdbinit;
+ const char *system_gdbinit;
+ const char *home_gdbinit;
+ const char *local_gdbinit;
get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
+ /* Note: The options in the list below are only approximately sorted
+ in the alphabetical order, so as to group closely related options
+ together. */
fputs_unfiltered (_("\
This is the GNU debugger. Usage:\n\n\
gdb [options] [executable-file [core-file or process-id]]\n\
gdb [options] --args executable-file [inferior-arguments ...]\n\n\
-Options:\n\n\
"), stream);
fputs_unfiltered (_("\
+Selection of debuggee and its files:\n\n\
--args Arguments after executable-file are passed to inferior\n\
+ --core=COREFILE Analyze the core dump COREFILE.\n\
+ --exec=EXECFILE Use EXECFILE as the executable.\n\
+ --pid=PID Attach to running process PID.\n\
+ --directory=DIR Search for source files in DIR.\n\
+ --se=FILE Use FILE as symbol file and executable file.\n\
+ --symbols=SYMFILE Read symbols from SYMFILE.\n\
+ --readnow Fully read symbol files on first access.\n\
+ --write Set writing into executable and core files.\n\n\
"), stream);
fputs_unfiltered (_("\
- -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
- --batch Exit after processing options.\n\
- --batch-silent As for --batch, but suppress all gdb stdout output.\n\
- --return-child-result\n\
- GDB exit code will be the child's exit code.\n\
- --cd=DIR Change current directory to DIR.\n\
+Initial commands and command files:\n\n\
--command=FILE, -x Execute GDB commands from FILE.\n\
+ --init-command=FILE, -ix\n\
+ Like -x but execute commands before loading inferior.\n\
--eval-command=COMMAND, -ex\n\
Execute a single GDB command.\n\
May be used multiple times and in conjunction\n\
with --command.\n\
- --init-command=FILE, -ix Like -x but execute it before loading inferior.\n\
- --init-eval-command=COMMAND, -iex Like -ex but before loading inferior.\n\
- --core=COREFILE Analyze the core dump COREFILE.\n\
- --pid=PID Attach to running process PID.\n\
+ --init-eval-command=COMMAND, -iex\n\
+ Like -ex but before loading inferior.\n\
+ --nh Do not read ~/.gdbinit.\n\
+ --nx Do not read any .gdbinit files in any directory.\n\n\
"), stream);
fputs_unfiltered (_("\
- --dbx DBX compatibility mode.\n\
- --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\
+Output and user interface control:\n\n\
--fullname Output information used by emacs-GDB interface.\n\
- --help Print this message.\n\
-"), stream);
- fputs_unfiltered (_("\
--interpreter=INTERP\n\
Select a specific interpreter / user interface\n\
-"), stream);
- fputs_unfiltered (_("\
- -l TIMEOUT Set timeout in seconds for remote debugging.\n\
- --nw Do not use a window interface.\n\
- --nx Do not read any "), stream);
- fputs_unfiltered (gdbinit, stream);
- fputs_unfiltered (_(" files.\n\
- --nh Do not read "), stream);
- fputs_unfiltered (gdbinit, stream);
- fputs_unfiltered (_(" file from home directory.\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\
+ -w Use the GUI interface.\n\
+ --nw Do not use the GUI interface.\n\
"), stream);
#if defined(TUI)
fputs_unfiltered (_("\
"), stream);
#endif
fputs_unfiltered (_("\
- --version Print version information and then exit.\n\
- -w Use a window interface.\n\
- --write Set writing into executable and core files.\n\
+ --dbx DBX compatibility mode.\n\
--xdb XDB compatibility mode.\n\
+ -q, --quiet, --silent\n\
+ Do not print version number on startup.\n\n\
+"), stream);
+ fputs_unfiltered (_("\
+Operating modes:\n\n\
+ --batch Exit after processing options.\n\
+ --batch-silent Like --batch, but suppress all gdb stdout output.\n\
+ --return-child-result\n\
+ GDB exit code will be the child's exit code.\n\
+ --configuration Print details about GDB configuration and then exit.\n\
+ --help Print this message and then exit.\n\
+ --version Print version information and then exit.\n\n\
+Remote debugging options:\n\n\
+ -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
+ -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
+Other options:\n\n\
+ --cd=DIR Change current directory to DIR.\n\
+ --data-directory=DIR, -D\n\
+ Set GDB's data-directory to DIR.\n\
"), stream);
fputs_unfiltered (_("\n\
At startup, GDB reads the following init files and executes their commands:\n\
projects / deliverable / binutils-gdb.git / blobdiff