/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2013 Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "inferior.h"
#include "symfile.h"
#include "gdbcore.h"
-
-#include "exceptions.h"
#include "getopt.h"
#include <sys/types.h>
-#include "gdb_stat.h"
+#include <sys/stat.h>
#include <ctype.h>
-
-#include "gdb_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>
+#include "event-top.h"
+#include "infrun.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
*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. */
return 1;
}
-/* Arguments of --command option and its counterpart. */
-typedef struct cmdarg {
- /* Type of this option. */
- enum {
- /* Option type -x. */
- CMDARG_FILE,
+/* Handle command errors thrown from within
+ catch_command_errors/catch_command_errors_const. */
+
+static int
+handle_command_errors (volatile struct gdb_exception e)
+{
+ if (e.reason < 0)
+ {
+ exception_print (gdb_stderr, e);
- /* Option type -ex. */
- CMDARG_COMMAND,
+ /* If any exception escaped to here, we better enable stdin.
+ Otherwise, any command that calls async_disable_stdin, and
+ then throws, will leave stdin inoperable. */
+ async_enable_stdin ();
+ return 0;
+ }
+ return 1;
+}
+
+/* Type of the command callback passed to catch_command_errors. */
+
+typedef void (catch_command_errors_ftype) (char *, int);
+
+/* Wrap calls to commands run before the event loop is started. */
+
+static int
+catch_command_errors (catch_command_errors_ftype *command,
+ char *arg, int from_tty)
+{
+ volatile struct gdb_exception e;
+
+ TRY_CATCH (e, RETURN_MASK_ALL)
+ {
+ int was_sync = sync_execution;
- /* Option type -ix. */
- CMDARG_INIT_FILE,
+ command (arg, from_tty);
+
+ maybe_wait_sync_command_done (was_sync);
+ }
+ return handle_command_errors (e);
+}
+
+/* Type of the command callback passed to catch_command_errors_const. */
+
+typedef void (catch_command_errors_const_ftype) (const char *, int);
+
+/* Like catch_command_errors, but works with const command and args. */
+
+static int
+catch_command_errors_const (catch_command_errors_const_ftype *command,
+ const char *arg, int from_tty)
+{
+ volatile struct gdb_exception e;
+
+ TRY_CATCH (e, RETURN_MASK_ALL)
+ {
+ int was_sync = sync_execution;
+
+ command (arg, from_tty);
+
+ maybe_wait_sync_command_done (was_sync);
+ }
+ return handle_command_errors (e);
+}
+
+/* Type of this option. */
+enum cmdarg_kind
+{
+ /* Option type -x. */
+ CMDARG_FILE,
+
+ /* Option type -ex. */
+ CMDARG_COMMAND,
+
+ /* Option type -ix. */
+ CMDARG_INIT_FILE,
- /* Option type -iex. */
- CMDARG_INIT_COMMAND
- } type;
+ /* Option type -iex. */
+ CMDARG_INIT_COMMAND
+};
+
+/* Arguments of --command option and its counterpart. */
+typedef struct cmdarg {
+ /* Type of this option. */
+ enum cmdarg_kind type;
/* Value of this option - filename or the GDB command itself. String memory
is not owned by this structure despite it is 'const'. */
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_program_name = xstrdup (argv[0]);
#endif
+ /* Prefix warning messages with the command name. */
+ warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name);
+
if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
- /* Don't use *_filtered or warning() (which relies on
- current_target) until after initialize_all_files(). */
- fprintf_unfiltered (gdb_stderr,
- _("%s: warning: error finding "
- "working directory: %s\n"),
- argv[0], safe_strerror (errno));
-
+ perror_warning_with_name (_("error finding working directory"));
+
current_directory = gdb_dirbuf;
/* Set the sysroot path. */
{"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'},
xfree (interpreter_p);
interpreter_p = xstrdup (INTERP_TUI);
#else
- fprintf_unfiltered (gdb_stderr,
- _("%s: TUI mode is not supported\n"),
- argv[0]);
- exit (1);
+ error (_("%s: TUI mode is not supported"), gdb_program_name);
#endif
break;
case OPT_WINDOWS:
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')
+ error (_("%s: empty path for `--data-directory'"),
+ gdb_program_name);
+ set_gdb_data_directory (optarg);
gdb_datadir_provided = 1;
break;
#ifdef GDBTK
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);
- }
+ error (_("%s: unable to load tclcommand file \"%s\""),
+ gdb_program_name, optarg);
break;
}
case 'y':
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);
+ warning (_("could not set baud rate to `%s'."),
+ optarg);
else
baud_rate = i;
}
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);
+ warning (_("could not set timeout limit to `%s'."),
+ optarg);
else
remote_timeout = i;
}
break;
case '?':
- fprintf_unfiltered (gdb_stderr,
- _("Use `%s --help' for a "
- "complete list of options.\n"),
- argv[0]);
- exit (1);
+ error (_("Use `%s --help' for a complete list of options."),
+ gdb_program_name);
}
}
- /* If --help or --version or --configuration, disable window
- interface. */
- if (print_help || print_version || print_configuration)
- {
- 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 (gdb_program_name);
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);
- }
+ error (_("%s: `--args' specified but no program specified"),
+ gdb_program_name);
+
symarg = argv[optind];
execarg = argv[optind];
++optind;
error (_("Interpreter `%s' unrecognized"), interpreter_p);
/* Install it. */
if (!interp_set (interp, 1))
- {
- fprintf_unfiltered (gdb_stderr,
- "Interpreter `%s' failed to initialize.\n",
- interpreter_p);
- exit (1);
- }
+ error (_("Interpreter `%s' failed to initialize."), interpreter_p);
}
/* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
}
/* Set off error and warning messages with a blank line. */
+ xfree (warning_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_const (source_script, system_gdbinit,
- 0, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, system_gdbinit, 0);
/* 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_const (source_script,
- home_gdbinit, 0, RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, home_gdbinit, 0);
/* Process '-ix' and '-iex' options early. */
for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
{
case CMDARG_INIT_FILE:
catch_command_errors_const (source_script, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
break;
case CMDARG_INIT_COMMAND:
catch_command_errors (execute_command, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
break;
}
/* Now perform all the actions indicated by the arguments. */
if (cdarg != NULL)
{
- catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
+ catch_command_errors (cd_command, cdarg, 0);
}
for (i = 0; i < ndir; i++)
- catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
+ catch_command_errors (directory_switch, dirarg[i], 0);
xfree (dirarg);
/* Skip auto-loading section-specified scripts until we've sourced
/* 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_flag, RETURN_MASK_ALL))
- catch_command_errors (symbol_file_add_main, symarg,
- !batch_flag, RETURN_MASK_ALL);
+ if (catch_command_errors_const (exec_file_attach, execarg,
+ !batch_flag))
+ catch_command_errors_const (symbol_file_add_main, symarg,
+ !batch_flag);
}
else
{
if (execarg != NULL)
- catch_command_errors (exec_file_attach, execarg,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors_const (exec_file_attach, execarg,
+ !batch_flag);
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);
}
if (corearg && pidarg)
"a core file at the same time."));
if (corearg != NULL)
- catch_command_errors (core_file_command, corearg,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors (core_file_command, corearg, !batch_flag);
else if (pidarg != NULL)
- catch_command_errors (attach_command, pidarg,
- !batch_flag, RETURN_MASK_ALL);
+ catch_command_errors (attach_command, pidarg, !batch_flag);
else if (pid_or_core_arg)
{
/* The user specified 'gdb program pid' or gdb program core'.
if (isdigit (pid_or_core_arg[0]))
{
if (catch_command_errors (attach_command, pid_or_core_arg,
- !batch_flag, RETURN_MASK_ALL) == 0)
+ !batch_flag) == 0)
catch_command_errors (core_file_command, pid_or_core_arg,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
}
else /* Can't be a pid, better be a corefile. */
catch_command_errors (core_file_command, pid_or_core_arg,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
}
if (ttyarg != NULL)
{
auto_load_local_gdbinit_loaded = 1;
- catch_command_errors_const (source_script, local_gdbinit, 0,
- RETURN_MASK_ALL);
+ catch_command_errors_const (source_script, local_gdbinit, 0);
}
}
{
case CMDARG_FILE:
catch_command_errors_const (source_script, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
break;
case CMDARG_COMMAND:
catch_command_errors (execute_command, cmdarg_p->string,
- !batch_flag, RETURN_MASK_ALL);
+ !batch_flag);
break;
}
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. */
fputs_unfiltered (_("\
--dbx DBX compatibility mode.\n\
--xdb XDB compatibility mode.\n\
- --quiet Do not print version number on startup.\n\n\
+ -q, --quiet, --silent\n\
+ Do not print version number on startup.\n\n\
"), stream);
fputs_unfiltered (_("\
Operating modes:\n\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