X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fmain.c;h=1552e95f4cd222d0222e8b70c9ae4d71b7157882;hb=b5a9bfbebec0a42d3c5b4fe3b7a62bd31cecc440;hp=aecd60afe6ca56b3f8ed3681eaf1ea06a464855a;hpb=f218b647aa21168473b973e3459258ba21ba8fbc;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/main.c b/gdb/main.c index aecd60afe6..1552e95f4c 100644 --- a/gdb/main.c +++ b/gdb/main.c @@ -1,6 +1,6 @@ /* Top level stuff for GDB, the GNU debugger. - Copyright (C) 1986-2015 Free Software Foundation, Inc. + Copyright (C) 1986-2018 Free Software Foundation, Inc. This file is part of GDB. @@ -44,6 +44,9 @@ #include #include "event-top.h" #include "infrun.h" +#include "signals-state-save-restore.h" +#include +#include "common/pathstuff.h" /* The selected interpreter. This will be used as a set command variable, so it should always be malloc'ed - since @@ -68,10 +71,6 @@ static int gdb_datadir_provided = 0; the possibly relocated path to python's lib directory. */ char *python_libdir = 0; -struct ui_file *gdb_stdout; -struct ui_file *gdb_stderr; -struct ui_file *gdb_stdlog; -struct ui_file *gdb_stdin; /* Target IO streams. */ struct ui_file *gdb_stdtargin; struct ui_file *gdb_stdtarg; @@ -122,7 +121,7 @@ set_gdb_data_directory (const char *new_datadir) warning (_("%s is not a directory."), new_datadir); xfree (gdb_datadir); - gdb_datadir = gdb_realpath (new_datadir); + gdb_datadir = gdb_realpath (new_datadir).release (); /* 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 @@ -130,10 +129,10 @@ set_gdb_data_directory (const char *new_datadir) isn't canonical, but that's ok. */ if (!IS_ABSOLUTE_PATH (gdb_datadir)) { - char *abs_datadir = gdb_abspath (gdb_datadir); + gdb::unique_xmalloc_ptr abs_datadir = gdb_abspath (gdb_datadir); xfree (gdb_datadir); - gdb_datadir = abs_datadir; + gdb_datadir = abs_datadir.release (); } } @@ -209,7 +208,7 @@ get_init_files (const char **system_gdbinit, if (!initialized) { struct stat homebuf, cwdbuf, s; - char *homedir; + const char *homedir; if (SYSTEM_GDBINIT[0]) { @@ -226,13 +225,13 @@ get_init_files (const char **system_gdbinit, { /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR to gdb_datadir. */ - char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len); + char *tmp_sys_gdbinit = xstrdup (&SYSTEM_GDBINIT[datadir_len]); char *p; for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p) continue; relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p, - NULL); + (char *) NULL); xfree (tmp_sys_gdbinit); } else @@ -297,7 +296,9 @@ setup_alternate_signal_stack (void) #ifdef HAVE_SIGALTSTACK stack_t ss; - ss.ss_sp = xmalloc (SIGSTKSZ); + /* FreeBSD versions older than 11.0 use char * for ss_sp instead of + void *. This cast works with both types. */ + ss.ss_sp = (char *) xmalloc (SIGSTKSZ); ss.ss_size = SIGSTKSZ; ss.ss_flags = 0; @@ -305,17 +306,29 @@ setup_alternate_signal_stack (void) #endif } -/* Call command_loop. If it happens to return, pass that through as a - non-zero return status. */ +/* Call command_loop. */ -static int -captured_command_loop (void *data) +/* Prevent inlining this function for the benefit of GDB's selftests + in the testsuite. Those tests want to run GDB under GDB and stop + here. */ +static void captured_command_loop () __attribute__((noinline)); + +static void +captured_command_loop () { + struct ui *ui = current_ui; + /* Top-level execution commands can be run in the background from here on. */ - interpreter_async = 1; + current_ui->async = 1; + + /* Give the interpreter a chance to print a prompt, if necessary */ + if (ui->prompt_state != PROMPT_BLOCKED) + interp_pre_command_loop (top_level_interpreter ()); + + /* Now it's time to start the event loop. */ + start_event_loop (); - current_interp_command_loop (); /* 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 @@ -325,15 +338,12 @@ captured_command_loop (void *data) 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; + error) we try to quit. If the quit is aborted, our caller + catches the signal and restarts the command loop. */ + quit_command (NULL, ui->instream == ui->stdin_stream); } -/* Handle command errors thrown from within - catch_command_errors/catch_command_errors_const. */ +/* Handle command errors thrown from within catch_command_errors. */ static int handle_command_errors (struct gdb_exception e) @@ -351,19 +361,20 @@ handle_command_errors (struct gdb_exception e) return 1; } -/* Type of the command callback passed to catch_command_errors. */ +/* Type of the command callback passed to the const + catch_command_errors. */ -typedef void (catch_command_errors_ftype) (char *, int); +typedef void (catch_command_errors_const_ftype) (const 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) +catch_command_errors (catch_command_errors_const_ftype command, + const char *arg, int from_tty) { TRY { - int was_sync = sync_execution; + int was_sync = current_ui->prompt_state == PROMPT_BLOCKED; command (arg, from_tty); @@ -378,31 +389,31 @@ catch_command_errors (catch_command_errors_ftype *command, return 1; } -/* Type of the command callback passed to catch_command_errors_const. */ +/* Adapter for symbol_file_add_main that translates 'from_tty' to a + symfile_add_flags. */ -typedef void (catch_command_errors_const_ftype) (const char *, int); +static void +symbol_file_add_main_adapter (const char *arg, int from_tty) +{ + symfile_add_flags add_flags = 0; -/* Like catch_command_errors, but works with const command and args. */ + if (from_tty) + add_flags |= SYMFILE_VERBOSE; -static int -catch_command_errors_const (catch_command_errors_const_ftype *command, - const char *arg, int from_tty) -{ - TRY - { - int was_sync = sync_execution; + symbol_file_add_main (arg, add_flags); +} - command (arg, from_tty); +/* Perform validation of the '--readnow' and '--readnever' flags. */ - maybe_wait_sync_command_done (was_sync); - } - CATCH (e, RETURN_MASK_ALL) +static void +validate_readnow_readnever () +{ + if (readnever_symbol_files && readnow_symbol_files) { - return handle_command_errors (e); + error (_("%s: '--readnow' and '--readnever' cannot be " + "specified simultaneously"), + gdb_program_name); } - END_CATCH - - return 1; } /* Type of this option. */ @@ -422,24 +433,26 @@ enum cmdarg_kind }; /* Arguments of --command option and its counterpart. */ -typedef struct cmdarg { +struct cmdarg +{ + cmdarg (cmdarg_kind type_, char *string_) + : type (type_), string (string_) + {} + /* 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'. */ char *string; -} cmdarg_s; - -/* Define type VEC (cmdarg_s). */ -DEF_VEC_O (cmdarg_s); +}; -static int -captured_main (void *data) +static void +captured_main_1 (struct captured_main_args *context) { - struct captured_main_args *context = data; int argc = context->argc; char **argv = context->argv; + static int quiet = 0; static int set_args = 0; static int inhibit_home_gdbinit = 0; @@ -460,15 +473,10 @@ captured_main (void *data) static int print_configuration; /* Pointers to all arguments of --command option. */ - VEC (cmdarg_s) *cmdarg_vec = NULL; - struct cmdarg *cmdarg_p; + std::vector cmdarg_vec; - /* Indices of all arguments of --directory option. */ - char **dirarg; - /* Allocated size. */ - int dirsize; - /* Number of elements used. */ - int ndir; + /* All arguments of --directory option. */ + std::vector dirarg; /* gdb init files. */ const char *system_gdbinit; @@ -478,15 +486,14 @@ captured_main (void *data) int i; int save_auto_load; struct objfile *objfile; + int ret = 1; - struct cleanup *pre_stat_chain; - -#ifdef HAVE_SBRK - /* Set this before calling make_command_stats_cleanup. */ +#ifdef HAVE_USEFUL_SBRK + /* Set this before constructing scoped_command_stats. */ lim_at_start = (char *) sbrk (0); #endif - pre_stat_chain = make_command_stats_cleanup (0); + scoped_command_stats stat_reporter (false); #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); @@ -494,21 +501,15 @@ captured_main (void *data) #if defined (HAVE_SETLOCALE) setlocale (LC_CTYPE, ""); #endif +#ifdef ENABLE_NLS bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); +#endif bfd_init (); notice_open_fds (); - make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec); - dirsize = 1; - dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); - ndir = 0; - - clear_quit_flag (); - saved_command_line = (char *) xmalloc (saved_command_line_size); - saved_command_line[0] = '\0'; - instream = stdin; + saved_command_line = (char *) xstrdup (""); #ifdef __MINGW32__ /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented @@ -516,12 +517,9 @@ captured_main (void *data) setvbuf (stderr, NULL, _IONBF, BUFSIZ); #endif - gdb_stdout = stdio_fileopen (stdout); - gdb_stderr = stderr_fileopen (); + main_ui = new ui (stdin, stdout, stderr); + current_ui = main_ui; - 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 */ @@ -534,13 +532,14 @@ captured_main (void *data) #endif /* Prefix warning messages with the command name. */ - warning_pre_print = xstrprintf ("%s: warning: ", gdb_program_name); + gdb::unique_xmalloc_ptr tmp_warn_preprint + (xstrprintf ("%s: warning: ", gdb_program_name)); + warning_pre_print = tmp_warn_preprint.get (); - if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf))) + current_directory = getcwd (NULL, 0); + if (current_directory == NULL) perror_warning_with_name (_("error finding working directory")); - current_directory = gdb_dirbuf; - /* Set the sysroot path. */ gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE); @@ -560,7 +559,7 @@ captured_main (void *data) #ifdef WITH_PYTHON_PATH { /* For later use in helping Python find itself. */ - char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL); + char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL); python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE); xfree (tmp); @@ -594,14 +593,17 @@ captured_main (void *data) OPT_NOWINDOWS, OPT_WINDOWS, OPT_IX, - OPT_IEX + OPT_IEX, + OPT_READNOW, + OPT_READNEVER }; static struct option long_options[] = { {"tui", no_argument, 0, OPT_TUI}, {"dbx", no_argument, &dbx_commands, 1}, - {"readnow", no_argument, &readnow_symbol_files, 1}, - {"r", no_argument, &readnow_symbol_files, 1}, + {"readnow", no_argument, NULL, OPT_READNOW}, + {"readnever", no_argument, NULL, OPT_READNEVER}, + {"r", no_argument, NULL, OPT_READNOW}, {"quiet", no_argument, &quiet, 1}, {"q", no_argument, &quiet, 1}, {"silent", no_argument, &quiet, 1}, @@ -739,36 +741,20 @@ captured_main (void *data) pidarg = optarg; break; case 'x': - { - struct cmdarg cmdarg = { CMDARG_FILE, optarg }; - - VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); - } + cmdarg_vec.emplace_back (CMDARG_FILE, optarg); break; case 'X': - { - struct cmdarg cmdarg = { CMDARG_COMMAND, optarg }; - - VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); - } + cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg); break; case OPT_IX: - { - struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg }; - - VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); - } + cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg); break; case OPT_IEX: - { - struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg }; - - VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg); - } + cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg); break; case 'B': batch_flag = batch_silent = 1; - gdb_stdout = ui_file_new(); + gdb_stdout = new null_file (); break; case 'D': if (optarg[0] == '\0') @@ -805,13 +791,7 @@ captured_main (void *data) interpreter_p = xstrdup (optarg); break; case 'd': - dirarg[ndir++] = optarg; - if (ndir >= dirsize) - { - dirsize *= 2; - dirarg = (char **) xrealloc ((char *) dirarg, - dirsize * sizeof (*dirarg)); - } + dirarg.push_back (optarg); break; case 't': ttyarg = optarg; @@ -846,6 +826,20 @@ captured_main (void *data) } break; + case OPT_READNOW: + { + readnow_symbol_files = 1; + validate_readnow_readnever (); + } + break; + + case OPT_READNEVER: + { + readnever_symbol_files = 1; + validate_readnow_readnever (); + } + break; + case '?': error (_("Use `%s --help' for a complete list of options."), gdb_program_name); @@ -856,6 +850,8 @@ captured_main (void *data) quiet = 1; } + save_original_signals_state (quiet); + /* Try to set up an alternate signal stack for SIGSEGV handlers. */ setup_alternate_signal_stack (); @@ -923,7 +919,7 @@ captured_main (void *data) if (print_version) { - print_gdb_version (gdb_stdout); + print_gdb_version (gdb_stdout, false); wrap_here (""); printf_filtered ("\n"); exit (0); @@ -952,7 +948,7 @@ captured_main (void *data) { /* 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); + print_gdb_version (gdb_stdout, true); if (symarg) printf_filtered (".."); wrap_here (""); @@ -963,17 +959,7 @@ captured_main (void *data) /* Install the default UI. All the interpreters should have had a look at things by now. Initialize the default interpreter. */ - - { - /* Find it. */ - struct interp *interp = interp_lookup (interpreter_p); - - if (interp == NULL) - error (_("Interpreter `%s' unrecognized"), interpreter_p); - /* Install it. */ - if (!interp_set (interp, 1)) - error (_("Interpreter `%s' failed to initialize."), interpreter_p); - } + set_top_level_interpreter (interpreter_p); /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets GDB retain the old MI1 interpreter startup behavior. Output the @@ -983,7 +969,7 @@ captured_main (void *data) { /* 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); + print_gdb_version (gdb_stdout, true); if (symarg) printf_filtered (".."); wrap_here (""); @@ -993,7 +979,7 @@ captured_main (void *data) } /* Set off error and warning messages with a blank line. */ - xfree (warning_pre_print); + tmp_warn_preprint.reset (); warning_pre_print = _("\nwarning: "); /* Read and execute the system-wide gdbinit file, if it exists. @@ -1001,7 +987,7 @@ captured_main (void *data) 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); + ret = catch_command_errors (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 @@ -1009,31 +995,34 @@ captured_main (void *data) debugging or what directory you are in. */ if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit) - catch_command_errors_const (source_script, home_gdbinit, 0); + ret = catch_command_errors (source_script, home_gdbinit, 0); /* Process '-ix' and '-iex' options early. */ - for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++) - switch (cmdarg_p->type) + for (i = 0; i < cmdarg_vec.size (); i++) { - case CMDARG_INIT_FILE: - catch_command_errors_const (source_script, cmdarg_p->string, - !batch_flag); - break; - case CMDARG_INIT_COMMAND: - catch_command_errors (execute_command, cmdarg_p->string, - !batch_flag); - break; + const struct cmdarg &cmdarg_p = cmdarg_vec[i]; + + switch (cmdarg_p.type) + { + case CMDARG_INIT_FILE: + ret = catch_command_errors (source_script, cmdarg_p.string, + !batch_flag); + break; + case CMDARG_INIT_COMMAND: + ret = catch_command_errors (execute_command, cmdarg_p.string, + !batch_flag); + break; + } } /* Now perform all the actions indicated by the arguments. */ if (cdarg != NULL) { - catch_command_errors (cd_command, cdarg, 0); + ret = catch_command_errors (cd_command, cdarg, 0); } - for (i = 0; i < ndir; i++) - catch_command_errors (directory_switch, dirarg[i], 0); - xfree (dirarg); + for (i = 0; i < dirarg.size (); i++) + ret = catch_command_errors (directory_switch, dirarg[i], 0); /* Skip auto-loading section-specified scripts until we've sourced local_gdbinit (which is often used to augment the source search @@ -1048,19 +1037,20 @@ captured_main (void *data) /* 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_const (exec_file_attach, execarg, - !batch_flag)) - catch_command_errors_const (symbol_file_add_main, symarg, - !batch_flag); + ret = catch_command_errors (exec_file_attach, execarg, + !batch_flag); + if (ret != 0) + ret = catch_command_errors (symbol_file_add_main_adapter, + symarg, !batch_flag); } else { if (execarg != NULL) - catch_command_errors_const (exec_file_attach, execarg, + ret = catch_command_errors (exec_file_attach, execarg, !batch_flag); if (symarg != NULL) - catch_command_errors_const (symbol_file_add_main, symarg, - !batch_flag); + ret = catch_command_errors (symbol_file_add_main_adapter, + symarg, !batch_flag); } if (corearg && pidarg) @@ -1068,9 +1058,14 @@ captured_main (void *data) "a core file at the same time.")); if (corearg != NULL) - catch_command_errors (core_file_command, corearg, !batch_flag); + { + ret = catch_command_errors (core_file_command, corearg, + !batch_flag); + } else if (pidarg != NULL) - catch_command_errors (attach_command, pidarg, !batch_flag); + { + ret = catch_command_errors (attach_command, pidarg, !batch_flag); + } else if (pid_or_core_arg) { /* The user specified 'gdb program pid' or gdb program core'. @@ -1079,14 +1074,20 @@ captured_main (void *data) if (isdigit (pid_or_core_arg[0])) { - if (catch_command_errors (attach_command, pid_or_core_arg, - !batch_flag) == 0) - catch_command_errors (core_file_command, pid_or_core_arg, - !batch_flag); + ret = catch_command_errors (attach_command, pid_or_core_arg, + !batch_flag); + if (ret == 0) + ret = catch_command_errors (core_file_command, + pid_or_core_arg, + !batch_flag); + } + else + { + /* Can't be a pid, better be a corefile. */ + ret = catch_command_errors (core_file_command, + pid_or_core_arg, + !batch_flag); } - else /* Can't be a pid, better be a corefile. */ - catch_command_errors (core_file_command, pid_or_core_arg, - !batch_flag); } if (ttyarg != NULL) @@ -1099,7 +1100,8 @@ captured_main (void *data) the same as the $HOME/.gdbinit file (it should exist, also). */ if (local_gdbinit) { - auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit); + auto_load_local_gdbinit_pathname + = gdb_realpath (local_gdbinit).release (); if (!inhibit_gdbinit && auto_load_local_gdbinit && file_is_auto_load_safe (local_gdbinit, @@ -1109,7 +1111,7 @@ captured_main (void *data) { auto_load_local_gdbinit_loaded = 1; - catch_command_errors_const (source_script, local_gdbinit, 0); + ret = catch_command_errors (source_script, local_gdbinit, 0); } } @@ -1122,17 +1124,21 @@ captured_main (void *data) load_auto_scripts_for_objfile (objfile); /* Process '-x' and '-ex' options. */ - for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++) - switch (cmdarg_p->type) + for (i = 0; i < cmdarg_vec.size (); i++) { - case CMDARG_FILE: - catch_command_errors_const (source_script, cmdarg_p->string, - !batch_flag); - break; - case CMDARG_COMMAND: - catch_command_errors (execute_command, cmdarg_p->string, - !batch_flag); - break; + const struct cmdarg &cmdarg_p = cmdarg_vec[i]; + + switch (cmdarg_p.type) + { + case CMDARG_FILE: + ret = catch_command_errors (source_script, cmdarg_p.string, + !batch_flag); + break; + case CMDARG_COMMAND: + ret = catch_command_errors (execute_command, cmdarg_p.string, + !batch_flag); + break; + } } /* Read in the old history after all the command files have been @@ -1141,12 +1147,20 @@ captured_main (void *data) if (batch_flag) { + int error_status = EXIT_FAILURE; + int *exit_arg = ret == 0 ? &error_status : NULL; + /* We have hit the end of the batch file. */ - quit_force (NULL, 0); + quit_force (exit_arg, 0); } +} - /* Show time and/or space usage. */ - do_cleanups (pre_stat_chain); +static void +captured_main (void *data) +{ + struct captured_main_args *context = (struct captured_main_args *) data; + + captured_main_1 (context); /* NOTE: cagney/1999-11-07: There is probably no reason for not moving this loop and the code found in captured_command_loop() @@ -1154,7 +1168,15 @@ captured_main (void *data) change - SET_TOP_LEVEL() - has been eliminated. */ while (1) { - catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL); + TRY + { + captured_command_loop (); + } + CATCH (ex, RETURN_MASK_ALL) + { + exception_print (gdb_stderr, ex); + } + END_CATCH } /* No exit -- exit is through quit_command. */ } @@ -1162,7 +1184,16 @@ captured_main (void *data) int gdb_main (struct captured_main_args *args) { - catch_errors (captured_main, args, "", RETURN_MASK_ALL); + TRY + { + captured_main (args); + } + CATCH (ex, RETURN_MASK_ALL) + { + exception_print (gdb_stderr, ex); + } + END_CATCH + /* The only way to end up here is by an error (normal exit is handled by quit_force()), hence always return an error status. */ return 1; @@ -1200,6 +1231,7 @@ Selection of debuggee and its files:\n\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\ + --readnever Do not read symbol files.\n\ --write Set writing into executable and core files.\n\n\ "), stream); fputs_unfiltered (_("\