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- /* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "top.h"
- #include "target.h"
- #include "inferior.h"
- #include "symfile.h"
- #include "gdbcore.h"
- #include "getopt.h"
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <ctype.h>
- #include "gdbsupport/event-loop.h"
- #include "ui-out.h"
- #include "interps.h"
- #include "main.h"
- #include "source.h"
- #include "cli/cli-cmds.h"
- #include "objfiles.h"
- #include "auto-load.h"
- #include "maint.h"
- #include "filenames.h"
- #include "gdbsupport/filestuff.h"
- #include <signal.h>
- #include "event-top.h"
- #include "infrun.h"
- #include "gdbsupport/signals-state-save-restore.h"
- #include <algorithm>
- #include <vector>
- #include "gdbsupport/pathstuff.h"
- #include "cli/cli-style.h"
- #ifdef GDBTK
- #include "gdbtk/generic/gdbtk.h"
- #endif
- #include "gdbsupport/alt-stack.h"
- #include "observable.h"
- #include "serial.h"
- /* The selected interpreter. This will be used as a set command
- variable, so it should always be malloc'ed - since
- do_setshow_command will free it. */
- char *interpreter_p;
- /* System root path, used to find libraries etc. */
- std::string gdb_sysroot;
- /* GDB datadir, used to store data files. */
- std::string gdb_datadir;
- /* Non-zero if GDB_DATADIR was provided on the command line.
- This doesn't track whether data-directory is set later from the
- command line, but we don't reread system.gdbinit when that happens. */
- static int gdb_datadir_provided = 0;
- /* If gdb was configured with --with-python=/path,
- the possibly relocated path to python's lib directory. */
- std::string python_libdir;
- /* Target IO streams. */
- struct ui_file *gdb_stdtargin;
- struct ui_file *gdb_stdtarg;
- struct ui_file *gdb_stdtargerr;
- /* True if --batch or --batch-silent was seen. */
- int batch_flag = 0;
- /* Support for the --batch-silent option. */
- int batch_silent = 0;
- /* Support for --return-child-result option.
- Set the default to -1 to return error in the case
- that the program does not run or does not complete. */
- int return_child_result = 0;
- int return_child_result_value = -1;
- /* 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;
- gdb_printf (gdb_stderr, "Warning: ");
- print_sys_errmsg (new_datadir, save_errno);
- }
- else if (!S_ISDIR (st.st_mode))
- warning (_("%ps is not a directory."),
- styled_string (file_name_style.style (), new_datadir));
- gdb_datadir = gdb_realpath (new_datadir).get ();
- /* 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.c_str ()))
- {
- gdb::unique_xmalloc_ptr<char> abs_datadir
- = gdb_abspath (gdb_datadir.c_str ());
- gdb_datadir = abs_datadir.get ();
- }
- }
- /* 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. RELOCATABLE is true if the value is relocatable,
- false otherwise. This may return an empty string under the same
- conditions as make_relative_prefix returning NULL. */
- static std::string
- relocate_path (const char *progname, const char *initial, bool relocatable)
- {
- if (relocatable)
- {
- gdb::unique_xmalloc_ptr<char> str (make_relative_prefix (progname,
- BINDIR,
- initial));
- if (str != nullptr)
- return str.get ();
- return std::string ();
- }
- return initial;
- }
- /* Like relocate_path, but specifically checks for a directory.
- INITIAL is relocated according to the rules of relocate_path. If
- the result is a directory, it is used; otherwise, INITIAL is used.
- The chosen directory is then canonicalized using lrealpath. */
- std::string
- relocate_gdb_directory (const char *initial, bool relocatable)
- {
- std::string dir = relocate_path (gdb_program_name, initial, relocatable);
- if (!dir.empty ())
- {
- struct stat s;
- if (stat (dir.c_str (), &s) != 0 || !S_ISDIR (s.st_mode))
- {
- dir.clear ();
- }
- }
- if (dir.empty ())
- dir = initial;
- /* Canonicalize the directory. */
- if (!dir.empty ())
- {
- gdb::unique_xmalloc_ptr<char> canon_sysroot (lrealpath (dir.c_str ()));
- if (canon_sysroot)
- dir = canon_sysroot.get ();
- }
- return dir;
- }
- /* Given a gdbinit path in FILE, adjusts it according to the gdb_datadir
- parameter if it is in the data dir, or passes it through relocate_path
- otherwise. */
- static std::string
- relocate_file_path_maybe_in_datadir (const std::string &file,
- bool relocatable)
- {
- size_t datadir_len = strlen (GDB_DATADIR);
- std::string relocated_path;
- /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
- has been provided, search for SYSTEM_GDBINIT there. */
- if (gdb_datadir_provided
- && datadir_len < file.length ()
- && filename_ncmp (file.c_str (), GDB_DATADIR, datadir_len) == 0
- && IS_DIR_SEPARATOR (file[datadir_len]))
- {
- /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
- to gdb_datadir. */
- size_t start = datadir_len;
- for (; IS_DIR_SEPARATOR (file[start]); ++start)
- ;
- relocated_path = gdb_datadir + SLASH_STRING + file.substr (start);
- }
- else
- {
- relocated_path = relocate_path (gdb_program_name, file.c_str (),
- relocatable);
- }
- return relocated_path;
- }
- /* A class to wrap up the logic for finding the three different types of
- initialisation files GDB uses, system wide, home directory, and current
- working directory. */
- class gdb_initfile_finder
- {
- public:
- /* Constructor. Finds initialisation files named FILENAME in the home
- directory or local (current working) directory. System initialisation
- files are found in both SYSTEM_FILENAME and SYSTEM_DIRNAME if these
- are not nullptr (either or both can be). The matching *_RELOCATABLE
- flag is passed through to RELOCATE_FILE_PATH_MAYBE_IN_DATADIR.
- If FILENAME starts with a '.' then when looking in the home directory
- this first '.' can be ignored in some cases. */
- explicit gdb_initfile_finder (const char *filename,
- const char *system_filename,
- bool system_filename_relocatable,
- const char *system_dirname,
- bool system_dirname_relocatable,
- bool lookup_local_file)
- {
- struct stat s;
- if (system_filename != nullptr && system_filename[0] != '\0')
- {
- std::string relocated_filename
- = relocate_file_path_maybe_in_datadir (system_filename,
- system_filename_relocatable);
- if (!relocated_filename.empty ()
- && stat (relocated_filename.c_str (), &s) == 0)
- m_system_files.push_back (relocated_filename);
- }
- if (system_dirname != nullptr && system_dirname[0] != '\0')
- {
- std::string relocated_dirname
- = relocate_file_path_maybe_in_datadir (system_dirname,
- system_dirname_relocatable);
- if (!relocated_dirname.empty ())
- {
- gdb_dir_up dir (opendir (relocated_dirname.c_str ()));
- if (dir != nullptr)
- {
- std::vector<std::string> files;
- while (true)
- {
- struct dirent *ent = readdir (dir.get ());
- if (ent == nullptr)
- break;
- std::string name (ent->d_name);
- if (name == "." || name == "..")
- continue;
- /* ent->d_type is not available on all systems
- (e.g. mingw, Solaris), so we have to call stat(). */
- std::string tmp_filename
- = relocated_dirname + SLASH_STRING + name;
- if (stat (tmp_filename.c_str (), &s) != 0
- || !S_ISREG (s.st_mode))
- continue;
- const struct extension_language_defn *extlang
- = get_ext_lang_of_file (tmp_filename.c_str ());
- /* We effectively don't support "set script-extension
- off/soft", because we are loading system init files
- here, so it does not really make sense to depend on
- a setting. */
- if (extlang != nullptr && ext_lang_present_p (extlang))
- files.push_back (std::move (tmp_filename));
- }
- std::sort (files.begin (), files.end ());
- m_system_files.insert (m_system_files.end (),
- files.begin (), files.end ());
- }
- }
- }
- /* If the .gdbinit file in the current directory is the same as
- the $HOME/.gdbinit file, it should not be sourced. homebuf
- and cwdbuf are used in that purpose. Make sure that the stats
- are zero in case one of them fails (this guarantees that they
- won't match if either exists). */
- struct stat homebuf, cwdbuf;
- memset (&homebuf, 0, sizeof (struct stat));
- memset (&cwdbuf, 0, sizeof (struct stat));
- m_home_file = find_gdb_home_config_file (filename, &homebuf);
- if (lookup_local_file && stat (filename, &cwdbuf) == 0)
- {
- if (m_home_file.empty ()
- || memcmp ((char *) &homebuf, (char *) &cwdbuf,
- sizeof (struct stat)))
- m_local_file = filename;
- }
- }
- DISABLE_COPY_AND_ASSIGN (gdb_initfile_finder);
- /* Return a list of system initialisation files. The list could be
- empty. */
- const std::vector<std::string> &system_files () const
- { return m_system_files; }
- /* Return the path to the home initialisation file. The string can be
- empty if there is no such file. */
- const std::string &home_file () const
- { return m_home_file; }
- /* Return the path to the local initialisation file. The string can be
- empty if there is no such file. */
- const std::string &local_file () const
- { return m_local_file; }
- private:
- /* Vector of all system init files in the order they should be processed.
- Could be empty. */
- std::vector<std::string> m_system_files;
- /* Initialization file from the home directory. Could be the empty
- string if there is no such file found. */
- std::string m_home_file;
- /* Initialization file from the current working directory. Could be the
- empty string if there is no such file found. */
- std::string m_local_file;
- };
- /* Compute the locations of init files that GDB should source and return
- them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. The SYSTEM_GDBINIT
- can be returned as an empty vector, and HOME_GDBINIT and LOCAL_GDBINIT
- can be returned as empty strings if there is no init file of that
- type. */
- static void
- get_init_files (std::vector<std::string> *system_gdbinit,
- std::string *home_gdbinit,
- std::string *local_gdbinit)
- {
- /* Cache the file lookup object so we only actually search for the files
- once. */
- static gdb::optional<gdb_initfile_finder> init_files;
- if (!init_files.has_value ())
- init_files.emplace (GDBINIT, SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE,
- SYSTEM_GDBINIT_DIR, SYSTEM_GDBINIT_DIR_RELOCATABLE,
- true);
- *system_gdbinit = init_files->system_files ();
- *home_gdbinit = init_files->home_file ();
- *local_gdbinit = init_files->local_file ();
- }
- /* Compute the location of the early init file GDB should source and return
- it in HOME_GDBEARLYINIT. HOME_GDBEARLYINIT could be returned as an
- empty string if there is no early init file found. */
- static void
- get_earlyinit_files (std::string *home_gdbearlyinit)
- {
- /* Cache the file lookup object so we only actually search for the files
- once. */
- static gdb::optional<gdb_initfile_finder> init_files;
- if (!init_files.has_value ())
- init_files.emplace (GDBEARLYINIT, nullptr, false, nullptr, false, false);
- *home_gdbearlyinit = init_files->home_file ();
- }
- /* Start up the event loop. This is the entry point to the event loop
- from the command loop. */
- static void
- start_event_loop ()
- {
- /* Loop until there is nothing to do. This is the entry point to
- the event loop engine. gdb_do_one_event will process one event
- for each invocation. It blocks waiting for an event and then
- processes it. */
- while (1)
- {
- int result = 0;
- try
- {
- result = gdb_do_one_event ();
- }
- catch (const gdb_exception &ex)
- {
- exception_print (gdb_stderr, ex);
- /* 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. */
- SWITCH_THRU_ALL_UIS ()
- {
- async_enable_stdin ();
- }
- /* If we long-jumped out of do_one_event, we probably didn't
- get around to resetting the prompt, which leaves readline
- in a messed-up state. Reset it here. */
- current_ui->prompt_state = PROMPT_NEEDED;
- gdb::observers::command_error.notify ();
- /* This call looks bizarre, but it is required. If the user
- entered a command that caused an error,
- after_char_processing_hook won't be called from
- rl_callback_read_char_wrapper. Using a cleanup there
- won't work, since we want this function to be called
- after a new prompt is printed. */
- if (after_char_processing_hook)
- (*after_char_processing_hook) ();
- /* Maybe better to set a flag to be checked somewhere as to
- whether display the prompt or not. */
- }
- if (result < 0)
- break;
- }
- /* We are done with the event loop. There are no more event sources
- to listen to. So we exit GDB. */
- return;
- }
- /* Call command_loop. */
- /* 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. */
- 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 ();
- /* If the command_loop returned, normally (rather than threw an
- 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. */
- static int
- handle_command_errors (const struct gdb_exception &e)
- {
- if (e.reason < 0)
- {
- exception_print (gdb_stderr, e);
- /* 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 the const
- catch_command_errors. */
- 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_const_ftype command,
- const char *arg, int from_tty,
- bool do_bp_actions = false)
- {
- try
- {
- int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
- command (arg, from_tty);
- maybe_wait_sync_command_done (was_sync);
- /* Do any commands attached to breakpoint we stopped at. */
- if (do_bp_actions)
- bpstat_do_actions ();
- }
- catch (const gdb_exception &e)
- {
- return handle_command_errors (e);
- }
- return 1;
- }
- /* Adapter for symbol_file_add_main that translates 'from_tty' to a
- symfile_add_flags. */
- static void
- symbol_file_add_main_adapter (const char *arg, int from_tty)
- {
- symfile_add_flags add_flags = 0;
- if (from_tty)
- add_flags |= SYMFILE_VERBOSE;
- symbol_file_add_main (arg, add_flags);
- }
- /* Perform validation of the '--readnow' and '--readnever' flags. */
- static void
- validate_readnow_readnever ()
- {
- if (readnever_symbol_files && readnow_symbol_files)
- {
- error (_("%s: '--readnow' and '--readnever' cannot be "
- "specified simultaneously"),
- gdb_program_name);
- }
- }
- /* 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,
- /* Option type -eix. */
- CMDARG_EARLYINIT_FILE,
- /* Option type -eiex. */
- CMDARG_EARLYINIT_COMMAND
- };
- /* Arguments of --command option and its counterpart. */
- 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;
- };
- /* From CMDARG_VEC execute command files (matching FILE_TYPE) or commands
- (matching CMD_TYPE). Update the value in *RET if and scripts or
- commands are executed. */
- static void
- execute_cmdargs (const std::vector<struct cmdarg> *cmdarg_vec,
- cmdarg_kind file_type, cmdarg_kind cmd_type,
- int *ret)
- {
- for (const auto &cmdarg_p : *cmdarg_vec)
- {
- if (cmdarg_p.type == file_type)
- *ret = catch_command_errors (source_script, cmdarg_p.string,
- !batch_flag);
- else if (cmdarg_p.type == cmd_type)
- *ret = catch_command_errors (execute_command, cmdarg_p.string,
- !batch_flag, true);
- }
- }
- static void
- captured_main_1 (struct captured_main_args *context)
- {
- int argc = context->argc;
- char **argv = context->argv;
- static int quiet = 0;
- static int set_args = 0;
- static int inhibit_home_gdbinit = 0;
- /* Pointers to various arguments from command line. */
- char *symarg = NULL;
- char *execarg = NULL;
- char *pidarg = NULL;
- char *corearg = NULL;
- char *pid_or_core_arg = NULL;
- char *cdarg = NULL;
- char *ttyarg = NULL;
- /* These are static so that we can take their address in an
- initializer. */
- static int print_help;
- static int print_version;
- static int print_configuration;
- /* Pointers to all arguments of --command option. */
- std::vector<struct cmdarg> cmdarg_vec;
- /* All arguments of --directory option. */
- std::vector<char *> dirarg;
- int i;
- int save_auto_load;
- int ret = 1;
- #ifdef HAVE_USEFUL_SBRK
- /* Set this before constructing scoped_command_stats. */
- lim_at_start = (char *) sbrk (0);
- #endif
- scoped_command_stats stat_reporter (false);
- #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
- setlocale (LC_MESSAGES, "");
- #endif
- #if defined (HAVE_SETLOCALE)
- setlocale (LC_CTYPE, "");
- #endif
- #ifdef ENABLE_NLS
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
- #endif
- notice_open_fds ();
- #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
- /* Note: `error' cannot be called before this point, because the
- caller will crash when trying to print the exception. */
- main_ui = new ui (stdin, stdout, stderr);
- current_ui = main_ui;
- gdb_stdtargerr = gdb_stderr; /* for moment */
- gdb_stdtargin = gdb_stdin; /* for moment */
- if (bfd_init () != BFD_INIT_MAGIC)
- error (_("fatal error: libbfd ABI mismatch"));
- #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
- /* Prefix warning messages with the command name. */
- gdb::unique_xmalloc_ptr<char> tmp_warn_preprint
- = xstrprintf ("%s: warning: ", gdb_program_name);
- warning_pre_print = tmp_warn_preprint.get ();
- current_directory = getcwd (NULL, 0);
- if (current_directory == NULL)
- perror_warning_with_name (_("error finding working directory"));
- /* Set the sysroot path. */
- gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
- TARGET_SYSTEM_ROOT_RELOCATABLE);
- if (gdb_sysroot.empty ())
- gdb_sysroot = TARGET_SYSROOT_PREFIX;
- debug_file_directory
- = relocate_gdb_directory (DEBUGDIR, DEBUGDIR_RELOCATABLE);
- gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
- GDB_DATADIR_RELOCATABLE);
- #ifdef WITH_PYTHON_LIBDIR
- python_libdir = relocate_gdb_directory (WITH_PYTHON_LIBDIR,
- PYTHON_LIBDIR_RELOCATABLE);
- #endif
- #ifdef RELOC_SRCDIR
- add_substitute_path_rule (RELOC_SRCDIR,
- make_relative_prefix (gdb_program_name, BINDIR,
- RELOC_SRCDIR));
- #endif
- /* There will always be an interpreter. Either the one passed into
- this captured main, or one specified by the user at start up, or
- the console. Initialize the interpreter to the one requested by
- the application. */
- interpreter_p = xstrdup (context->interpreter_p);
- /* Parse arguments and options. */
- {
- int c;
- /* When var field is 0, use flag field to record the equivalent
- short option (or arbitrary numbers starting at 10 for those
- with no equivalent). */
- enum {
- OPT_SE = 10,
- OPT_CD,
- OPT_ANNOTATE,
- OPT_STATISTICS,
- OPT_TUI,
- OPT_NOWINDOWS,
- OPT_WINDOWS,
- OPT_IX,
- OPT_IEX,
- OPT_EIX,
- OPT_EIEX,
- OPT_READNOW,
- OPT_READNEVER
- };
- /* This struct requires int* in the struct, but write_files is a bool.
- So use this temporary int that we write back after argument parsing. */
- int write_files_1 = 0;
- static struct option long_options[] =
- {
- {"tui", no_argument, 0, OPT_TUI},
- {"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},
- {"nh", no_argument, &inhibit_home_gdbinit, 1},
- {"nx", no_argument, &inhibit_gdbinit, 1},
- {"n", no_argument, &inhibit_gdbinit, 1},
- {"batch-silent", no_argument, 0, 'B'},
- {"batch", no_argument, &batch_flag, 1},
- /* This is a synonym for "--annotate=1". --annotate is now
- preferred, but keep this here for a long time because people
- will be running emacses which use --fullname. */
- {"fullname", no_argument, 0, 'f'},
- {"f", no_argument, 0, 'f'},
- {"annotate", required_argument, 0, OPT_ANNOTATE},
- {"help", no_argument, &print_help, 1},
- {"se", required_argument, 0, OPT_SE},
- {"symbols", required_argument, 0, 's'},
- {"s", required_argument, 0, 's'},
- {"exec", required_argument, 0, 'e'},
- {"e", required_argument, 0, 'e'},
- {"core", required_argument, 0, 'c'},
- {"c", required_argument, 0, 'c'},
- {"pid", required_argument, 0, 'p'},
- {"p", required_argument, 0, 'p'},
- {"command", required_argument, 0, 'x'},
- {"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},
- {"init-eval-command", required_argument, 0, OPT_IEX},
- {"ix", required_argument, 0, OPT_IX},
- {"iex", required_argument, 0, OPT_IEX},
- {"early-init-command", required_argument, 0, OPT_EIX},
- {"early-init-eval-command", required_argument, 0, OPT_EIEX},
- {"eix", required_argument, 0, OPT_EIX},
- {"eiex", required_argument, 0, OPT_EIEX},
- #ifdef GDBTK
- {"tclcommand", required_argument, 0, 'z'},
- {"enable-external-editor", no_argument, 0, 'y'},
- {"editor-command", required_argument, 0, 'w'},
- #endif
- {"ui", required_argument, 0, 'i'},
- {"interpreter", required_argument, 0, 'i'},
- {"i", required_argument, 0, 'i'},
- {"directory", required_argument, 0, 'd'},
- {"d", required_argument, 0, 'd'},
- {"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'},
- {"b", required_argument, 0, 'b'},
- {"nw", no_argument, NULL, OPT_NOWINDOWS},
- {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
- {"w", no_argument, NULL, OPT_WINDOWS},
- {"windows", no_argument, NULL, OPT_WINDOWS},
- {"statistics", no_argument, 0, OPT_STATISTICS},
- {"write", no_argument, &write_files_1, 1},
- {"args", no_argument, &set_args, 1},
- {"l", required_argument, 0, 'l'},
- {"return-child-result", no_argument, &return_child_result, 1},
- {0, no_argument, 0, 0}
- };
- while (1)
- {
- int option_index;
- c = getopt_long_only (argc, argv, "",
- long_options, &option_index);
- if (c == EOF || set_args)
- break;
- /* Long option that takes an argument. */
- if (c == 0 && long_options[option_index].flag == 0)
- c = long_options[option_index].val;
- switch (c)
- {
- case 0:
- /* Long option that just sets a flag. */
- break;
- case OPT_SE:
- symarg = optarg;
- execarg = optarg;
- break;
- case OPT_CD:
- cdarg = optarg;
- break;
- case OPT_ANNOTATE:
- /* FIXME: what if the syntax is wrong (e.g. not digits)? */
- annotation_level = atoi (optarg);
- break;
- case OPT_STATISTICS:
- /* Enable the display of both time and space usage. */
- set_per_command_time (1);
- set_per_command_space (1);
- break;
- case OPT_TUI:
- /* --tui is equivalent to -i=tui. */
- #ifdef TUI
- xfree (interpreter_p);
- interpreter_p = xstrdup (INTERP_TUI);
- #else
- error (_("%s: TUI mode is not supported"), gdb_program_name);
- #endif
- break;
- case OPT_WINDOWS:
- /* FIXME: cagney/2003-03-01: Not sure if this option is
- actually useful, and if it is, what it should do. */
- #ifdef GDBTK
- /* --windows is equivalent to -i=insight. */
- xfree (interpreter_p);
- interpreter_p = xstrdup (INTERP_INSIGHT);
- #endif
- break;
- case OPT_NOWINDOWS:
- /* -nw is equivalent to -i=console. */
- xfree (interpreter_p);
- interpreter_p = xstrdup (INTERP_CONSOLE);
- break;
- case 'f':
- annotation_level = 1;
- break;
- case 's':
- symarg = optarg;
- break;
- case 'e':
- execarg = optarg;
- break;
- case 'c':
- corearg = optarg;
- break;
- case 'p':
- pidarg = optarg;
- break;
- case 'x':
- cmdarg_vec.emplace_back (CMDARG_FILE, optarg);
- break;
- case 'X':
- cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg);
- break;
- case OPT_IX:
- cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg);
- break;
- case OPT_IEX:
- cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg);
- break;
- case OPT_EIX:
- cmdarg_vec.emplace_back (CMDARG_EARLYINIT_FILE, optarg);
- break;
- case OPT_EIEX:
- cmdarg_vec.emplace_back (CMDARG_EARLYINIT_COMMAND, optarg);
- break;
- case 'B':
- batch_flag = batch_silent = 1;
- gdb_stdout = new null_file ();
- break;
- case 'D':
- 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
- case 'z':
- {
- if (!gdbtk_test (optarg))
- error (_("%s: unable to load tclcommand file \"%s\""),
- gdb_program_name, optarg);
- break;
- }
- case 'y':
- /* Backwards compatibility only. */
- break;
- case 'w':
- {
- /* Set the external editor commands when gdb is farming out files
- to be edited by another program. */
- external_editor_command = xstrdup (optarg);
- break;
- }
- #endif /* GDBTK */
- case 'i':
- xfree (interpreter_p);
- interpreter_p = xstrdup (optarg);
- break;
- case 'd':
- dirarg.push_back (optarg);
- break;
- case 't':
- ttyarg = optarg;
- break;
- case 'q':
- quiet = 1;
- break;
- case 'b':
- {
- int rate;
- char *p;
- rate = strtol (optarg, &p, 0);
- if (rate == 0 && p == optarg)
- warning (_("could not set baud rate to `%s'."),
- optarg);
- else
- baud_rate = rate;
- }
- break;
- case 'l':
- {
- int timeout;
- char *p;
- timeout = strtol (optarg, &p, 0);
- if (timeout == 0 && p == optarg)
- warning (_("could not set timeout limit to `%s'."),
- optarg);
- else
- remote_timeout = timeout;
- }
- 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);
- }
- }
- write_files = (write_files_1 != 0);
- if (batch_flag)
- {
- quiet = 1;
- /* Disable all output styling when running in batch mode. */
- cli_styling = 0;
- }
- }
- save_original_signals_state (quiet);
- /* Try to set up an alternate signal stack for SIGSEGV handlers. */
- gdb::alternate_signal_stack signal_stack;
- /* Initialize all files. */
- gdb_init ();
- /* Process early init files and early init options from the command line. */
- if (!inhibit_gdbinit)
- {
- std::string home_gdbearlyinit;
- get_earlyinit_files (&home_gdbearlyinit);
- if (!home_gdbearlyinit.empty () && !inhibit_home_gdbinit)
- ret = catch_command_errors (source_script,
- home_gdbearlyinit.c_str (), 0);
- }
- execute_cmdargs (&cmdarg_vec, CMDARG_EARLYINIT_FILE,
- CMDARG_EARLYINIT_COMMAND, &ret);
- /* Initialize the extension languages. */
- ext_lang_initialization ();
- /* Recheck if we're starting up quietly after processing the startup
- scripts and commands. */
- if (!quiet)
- quiet = check_quiet_mode ();
- /* Now that gdb_init has created the initial inferior, we're in
- position to set args for that inferior. */
- if (set_args)
- {
- /* The remaining options are the command-line options for the
- inferior. The first one is the sym/exec file, and the rest
- are arguments. */
- if (optind >= argc)
- error (_("%s: `--args' specified but no program specified"),
- gdb_program_name);
- symarg = argv[optind];
- execarg = argv[optind];
- ++optind;
- set_inferior_args_vector (argc - optind, &argv[optind]);
- }
- else
- {
- /* OK, that's all the options. */
- /* The first argument, if specified, is the name of the
- executable. */
- if (optind < argc)
- {
- symarg = argv[optind];
- execarg = argv[optind];
- optind++;
- }
- /* If the user hasn't already specified a PID or the name of a
- core file, then a second optional argument is allowed. If
- present, this argument should be interpreted as either a
- PID or a core file, whichever works. */
- if (pidarg == NULL && corearg == NULL && optind < argc)
- {
- pid_or_core_arg = argv[optind];
- optind++;
- }
- /* Any argument left on the command line is unexpected and
- will be ignored. Inform the user. */
- if (optind < argc)
- gdb_printf (gdb_stderr,
- _("Excess command line "
- "arguments ignored. (%s%s)\n"),
- argv[optind],
- (optind == argc - 1) ? "" : " ...");
- }
- /* Lookup gdbinit files. Note that the gdbinit file name may be
- overridden during file initialization, so get_init_files should be
- called after gdb_init. */
- std::vector<std::string> system_gdbinit;
- std::string home_gdbinit;
- std::string local_gdbinit;
- get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
- /* Do these (and anything which might call wrap_here or *_filtered)
- after initialize_all_files() but before the interpreter has been
- installed. Otherwize the help/version messages will be eaten by
- the interpreter's output handler. */
- if (print_version)
- {
- print_gdb_version (gdb_stdout, false);
- gdb_printf ("\n");
- exit (0);
- }
- if (print_help)
- {
- print_gdb_help (gdb_stdout);
- exit (0);
- }
- if (print_configuration)
- {
- print_gdb_configuration (gdb_stdout);
- gdb_printf ("\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
- it isn't encapsulated in MI output. */
- if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
- {
- /* 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, true);
- if (symarg)
- gdb_printf ("..");
- gdb_printf ("\n");
- gdb_flush (gdb_stdout); /* Force to screen during slow
- operations. */
- }
- /* Install the default UI. All the interpreters should have had a
- look at things by now. Initialize the default interpreter. */
- 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
- copyright message after the interpreter is installed when it is
- any sane interpreter. */
- if (!quiet && !current_interp_named_p (INTERP_MI1))
- {
- /* 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, true);
- if (symarg)
- gdb_printf ("..");
- gdb_printf ("\n");
- gdb_flush (gdb_stdout); /* Force to screen during slow
- operations. */
- }
- /* Set off error and warning messages with a blank line. */
- tmp_warn_preprint.reset ();
- warning_pre_print = _("\nwarning: ");
- /* Read and execute the system-wide gdbinit file, if it exists.
- This is done *before* all the command line arguments are
- processed; it sets global parameters, which are independent of
- what file you are debugging or what directory you are in. */
- if (!system_gdbinit.empty () && !inhibit_gdbinit)
- {
- for (const std::string &file : system_gdbinit)
- ret = catch_command_errors (source_script, file.c_str (), 0);
- }
- /* Read and execute $HOME/.gdbinit file, if it exists. This is done
- *before* all the command line arguments are processed; it sets
- global parameters, which are independent of what file you are
- debugging or what directory you are in. */
- if (!home_gdbinit.empty () && !inhibit_gdbinit && !inhibit_home_gdbinit)
- ret = catch_command_errors (source_script, home_gdbinit.c_str (), 0);
- /* Process '-ix' and '-iex' options early. */
- execute_cmdargs (&cmdarg_vec, CMDARG_INIT_FILE, CMDARG_INIT_COMMAND, &ret);
- /* Now perform all the actions indicated by the arguments. */
- if (cdarg != NULL)
- {
- ret = catch_command_errors (cd_command, cdarg, 0);
- }
- 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
- path). */
- save_auto_load = global_auto_load;
- global_auto_load = 0;
- if (execarg != NULL
- && symarg != NULL
- && strcmp (execarg, symarg) == 0)
- {
- /* 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! */
- 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)
- ret = catch_command_errors (exec_file_attach, execarg,
- !batch_flag);
- if (symarg != NULL)
- ret = catch_command_errors (symbol_file_add_main_adapter,
- symarg, !batch_flag);
- }
- if (corearg && pidarg)
- error (_("Can't attach to process and specify "
- "a core file at the same time."));
- if (corearg != NULL)
- {
- ret = catch_command_errors (core_file_command, corearg,
- !batch_flag);
- }
- else if (pidarg != NULL)
- {
- 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'.
- If pid_or_core_arg's first character is a digit, try attach
- first and then corefile. Otherwise try just corefile. */
- if (isdigit (pid_or_core_arg[0]))
- {
- 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);
- }
- }
- if (ttyarg != NULL)
- current_inferior ()->set_tty (ttyarg);
- /* Error messages should no longer be distinguished with extra output. */
- warning_pre_print = _("warning: ");
- /* Read the .gdbinit file in the current directory, *if* it isn't
- the same as the $HOME/.gdbinit file (it should exist, also). */
- if (!local_gdbinit.empty ())
- {
- auto_load_local_gdbinit_pathname
- = gdb_realpath (local_gdbinit.c_str ()).release ();
- if (!inhibit_gdbinit && auto_load_local_gdbinit)
- {
- auto_load_debug_printf ("Loading .gdbinit file \"%s\".",
- local_gdbinit.c_str ());
- if (file_is_auto_load_safe (local_gdbinit.c_str ()))
- {
- auto_load_local_gdbinit_loaded = 1;
- ret = catch_command_errors (source_script, local_gdbinit.c_str (), 0);
- }
- }
- }
- /* Now that all .gdbinit's have been read and all -d options have been
- processed, we can read any scripts mentioned in SYMARG.
- We wait until now because it is common to add to the source search
- path in local_gdbinit. */
- global_auto_load = save_auto_load;
- for (objfile *objfile : current_program_space->objfiles ())
- load_auto_scripts_for_objfile (objfile);
- /* Process '-x' and '-ex' options. */
- execute_cmdargs (&cmdarg_vec, CMDARG_FILE, CMDARG_COMMAND, &ret);
- /* Read in the old history after all the command files have been
- read. */
- init_history ();
- 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 (exit_arg, 0);
- }
- }
- 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()
- into the command_loop() proper. The main thing holding back that
- change - SET_TOP_LEVEL() - has been eliminated. */
- while (1)
- {
- try
- {
- captured_command_loop ();
- }
- catch (const gdb_exception &ex)
- {
- exception_print (gdb_stderr, ex);
- }
- }
- /* No exit -- exit is through quit_command. */
- }
- int
- gdb_main (struct captured_main_args *args)
- {
- try
- {
- captured_main (args);
- }
- catch (const gdb_exception &ex)
- {
- exception_print (gdb_stderr, ex);
- }
- /* 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;
- }
- /* 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 (struct ui_file *stream)
- {
- std::vector<std::string> system_gdbinit;
- std::string home_gdbinit;
- std::string local_gdbinit;
- std::string home_gdbearlyinit;
- get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
- get_earlyinit_files (&home_gdbearlyinit);
- /* Note: The options in the list below are only approximately sorted
- in the alphabetical order, so as to group closely related options
- together. */
- gdb_puts (_("\
- 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\
- "), stream);
- gdb_puts (_("\
- 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\
- --readnever Do not read symbol files.\n\
- --write Set writing into executable and core files.\n\n\
- "), stream);
- gdb_puts (_("\
- 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-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);
- gdb_puts (_("\
- Output and user interface control:\n\n\
- --fullname Output information used by emacs-GDB interface.\n\
- --interpreter=INTERP\n\
- Select a specific interpreter / user interface.\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)
- gdb_puts (_("\
- --tui Use a terminal user interface.\n\
- "), stream);
- #endif
- gdb_puts (_("\
- -q, --quiet, --silent\n\
- Do not print version number on startup.\n\n\
- "), stream);
- gdb_puts (_("\
- 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);
- gdb_puts (_("\n\
- At startup, GDB reads the following early init files and executes their\n\
- commands:\n\
- "), stream);
- if (!home_gdbearlyinit.empty ())
- gdb_printf (stream, _("\
- * user-specific early init file: %s\n\
- "), home_gdbearlyinit.c_str ());
- if (home_gdbearlyinit.empty ())
- gdb_printf (stream, _("\
- None found.\n"));
- gdb_puts (_("\n\
- At startup, GDB reads the following init files and executes their commands:\n\
- "), stream);
- if (!system_gdbinit.empty ())
- {
- std::string output;
- for (size_t idx = 0; idx < system_gdbinit.size (); ++idx)
- {
- output += system_gdbinit[idx];
- if (idx < system_gdbinit.size () - 1)
- output += ", ";
- }
- gdb_printf (stream, _("\
- * system-wide init files: %s\n\
- "), output.c_str ());
- }
- if (!home_gdbinit.empty ())
- gdb_printf (stream, _("\
- * user-specific init file: %s\n\
- "), home_gdbinit.c_str ());
- if (!local_gdbinit.empty ())
- gdb_printf (stream, _("\
- * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
- "), local_gdbinit.c_str ());
- if (system_gdbinit.empty () && home_gdbinit.empty ()
- && local_gdbinit.empty ())
- gdb_printf (stream, _("\
- None found.\n"));
- gdb_puts (_("\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\
- "), stream);
- if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
- gdb_printf (stream, _("\n\
- Report bugs to %ps.\n\
- "), styled_string (file_name_style.style (), REPORT_BUGS_TO));
- if (stream == gdb_stdout)
- gdb_printf (stream, _("\n\
- You can ask GDB-related questions on the GDB users mailing list\n\
- (gdb@sourceware.org) or on GDB's IRC channel (#gdb on Freenode).\n"));
- }
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