/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
-#include "event-loop.h"
+#include "gdbsupport/event-loop.h"
#include "ui-out.h"
#include "interps.h"
#include "maint.h"
#include "filenames.h"
-#include "common/filestuff.h"
+#include "gdbsupport/filestuff.h"
#include <signal.h>
#include "event-top.h"
#include "infrun.h"
-#include "common/signals-state-save-restore.h"
+#include "gdbsupport/signals-state-save-restore.h"
+#include <algorithm>
#include <vector>
-#include "common/pathstuff.h"
+#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"
/* The selected interpreter. This will be used as a set command
variable, so it should always be malloc'ed - since
char *gdb_sysroot = 0;
/* GDB datadir, used to store data files. */
-char *gdb_datadir = 0;
+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
/* If gdb was configured with --with-python=/path,
the possibly relocated path to python's lib directory. */
-char *python_libdir = 0;
+std::string python_libdir;
/* Target IO streams. */
struct ui_file *gdb_stdtargin;
print_sys_errmsg (new_datadir, save_errno);
}
else if (!S_ISDIR (st.st_mode))
- warning (_("%s is not a directory."), new_datadir);
+ warning (_("%ps is not a directory."),
+ styled_string (file_name_style.style (), new_datadir));
- xfree (gdb_datadir);
- gdb_datadir = gdb_realpath (new_datadir).release ();
+ 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))
+ if (!IS_ABSOLUTE_PATH (gdb_datadir.c_str ()))
{
- gdb::unique_xmalloc_ptr<char> abs_datadir = gdb_abspath (gdb_datadir);
+ gdb::unique_xmalloc_ptr<char> abs_datadir
+ = gdb_abspath (gdb_datadir.c_str ());
- xfree (gdb_datadir);
- gdb_datadir = abs_datadir.release ();
+ 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. FLAG is true if the value is relocatable, false
- otherwise. Returns a newly allocated string; this may return NULL
- under the same conditions as make_relative_prefix. */
+ 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 char *
-relocate_path (const char *progname, const char *initial, int flag)
+static std::string
+relocate_path (const char *progname, const char *initial, bool relocatable)
{
- if (flag)
- return make_relative_prefix (progname, BINDIR, initial);
- return xstrdup (initial);
+ 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. This
- function always returns a newly-allocated string. */
+ The chosen directory is then canonicalized using lrealpath. */
-char *
-relocate_gdb_directory (const char *initial, int flag)
+std::string
+relocate_gdb_directory (const char *initial, bool relocatable)
{
- char *dir;
-
- dir = relocate_path (gdb_program_name, initial, flag);
- if (dir)
+ std::string dir = relocate_path (gdb_program_name, initial, relocatable);
+ if (!dir.empty ())
{
struct stat s;
- if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
+ if (stat (dir.c_str (), &s) != 0 || !S_ISDIR (s.st_mode))
{
- xfree (dir);
- dir = NULL;
+ dir.clear ();
}
}
- if (!dir)
- dir = xstrdup (initial);
+ if (dir.empty ())
+ dir = initial;
/* Canonicalize the directory. */
- if (*dir)
+ if (!dir.empty ())
{
- char *canon_sysroot = lrealpath (dir);
+ gdb::unique_xmalloc_ptr<char> canon_sysroot (lrealpath (dir.c_str ()));
if (canon_sysroot)
- {
- xfree (dir);
- dir = 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_gdbinit_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;
+}
+
/* Compute the locations of init files that GDB should source and
return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
there is no system gdbinit (resp. home gdbinit and local gdbinit)
to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
- LOCAL_GDBINIT) is set to NULL. */
+ LOCAL_GDBINIT) is set to the empty string. */
static void
-get_init_files (const char **system_gdbinit,
- const char **home_gdbinit,
- const char **local_gdbinit)
+get_init_files (std::vector<std::string> *system_gdbinit,
+ std::string *home_gdbinit,
+ std::string *local_gdbinit)
{
- static const char *sysgdbinit = NULL;
- static char *homeinit = NULL;
- static const char *localinit = NULL;
+ static std::vector<std::string> sysgdbinit;
+ static std::string homeinit;
+ static std::string localinit;
static int initialized = 0;
if (!initialized)
{
struct stat homebuf, cwdbuf, s;
- const char *homedir;
if (SYSTEM_GDBINIT[0])
{
- int datadir_len = strlen (GDB_DATADIR);
- int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
- char *relocated_sysgdbinit;
-
- /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
- has been provided, search for SYSTEM_GDBINIT there. */
- if (gdb_datadir_provided
- && datadir_len < sys_gdbinit_len
- && 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; IS_DIR_SEPARATOR (*p); ++p)
- continue;
- relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
- (char *) NULL);
- xfree (tmp_sys_gdbinit);
- }
- else
- {
- relocated_sysgdbinit = relocate_path (gdb_program_name,
- SYSTEM_GDBINIT,
- SYSTEM_GDBINIT_RELOCATABLE);
- }
- if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
- sysgdbinit = relocated_sysgdbinit;
- else
- xfree (relocated_sysgdbinit);
+ std::string relocated_sysgdbinit
+ = relocate_gdbinit_path_maybe_in_datadir
+ (SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE);
+ if (!relocated_sysgdbinit.empty ()
+ && stat (relocated_sysgdbinit.c_str (), &s) == 0)
+ sysgdbinit.push_back (relocated_sysgdbinit);
+ }
+ if (SYSTEM_GDBINIT_DIR[0])
+ {
+ std::string relocated_gdbinit_dir
+ = relocate_gdbinit_path_maybe_in_datadir
+ (SYSTEM_GDBINIT_DIR, SYSTEM_GDBINIT_DIR_RELOCATABLE);
+ if (!relocated_gdbinit_dir.empty ()) {
+ gdb_dir_up dir (opendir (relocated_gdbinit_dir.c_str ()));
+ if (dir != nullptr)
+ {
+ std::vector<std::string> files;
+ for (;;)
+ {
+ 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 filename
+ = relocated_gdbinit_dir + SLASH_STRING + name;
+ if (stat (filename.c_str (), &s) != 0
+ || !S_ISREG (s.st_mode))
+ continue;
+ const struct extension_language_defn *extlang
+ = get_ext_lang_of_file (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 (filename));
+ }
+ std::sort (files.begin (), files.end ());
+ sysgdbinit.insert (sysgdbinit.end (),
+ files.begin (), files.end ());
+ }
+ }
}
- homedir = getenv ("HOME");
+ const char *homedir = getenv ("HOME");
/* If the .gdbinit file in the current directory is the same as
the $HOME/.gdbinit file, it should not be sourced. homebuf
if (homedir)
{
- homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
- if (stat (homeinit, &homebuf) != 0)
+ homeinit = std::string (homedir) + SLASH_STRING + GDBINIT;
+ if (stat (homeinit.c_str (), &homebuf) != 0)
{
- xfree (homeinit);
- homeinit = NULL;
+ homeinit = "";
}
}
- if (stat (gdbinit, &cwdbuf) == 0)
+ if (stat (GDBINIT, &cwdbuf) == 0)
{
- if (!homeinit
+ if (homeinit.empty ()
|| memcmp ((char *) &homebuf, (char *) &cwdbuf,
sizeof (struct stat)))
- localinit = gdbinit;
+ localinit = GDBINIT;
}
initialized = 1;
*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. */
+/* Start up the event loop. This is the entry point to the event loop
+ from the command loop. */
static void
-setup_alternate_signal_stack (void)
+start_event_loop ()
{
-#ifdef HAVE_SIGALTSTACK
- stack_t ss;
+ /* 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);
- /* 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;
+ /* 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. */
+ }
- sigaltstack(&ss, NULL);
-#endif
+ 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. */
/* Handle command errors thrown from within catch_command_errors. */
static int
-handle_command_errors (struct gdb_exception e)
+handle_command_errors (const struct gdb_exception &e)
{
if (e.reason < 0)
{
maybe_wait_sync_command_done (was_sync);
}
- catch (const gdb_exception_RETURN_MASK_ALL &e)
+ catch (const gdb_exception &e)
{
return handle_command_errors (e);
}
/* All arguments of --directory option. */
std::vector<char *> dirarg;
- /* gdb init files. */
- const char *system_gdbinit;
- const char *home_gdbinit;
- const char *local_gdbinit;
-
int i;
int save_auto_load;
int ret = 1;
notice_open_fds ();
- saved_command_line = (char *) xstrdup ("");
-
#ifdef __MINGW32__
/* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
as a Windows pipe, and Windows buffers on pipes. */
perror_warning_with_name (_("error finding working directory"));
/* Set the sysroot path. */
- gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
- TARGET_SYSTEM_ROOT_RELOCATABLE);
+ gdb_sysroot
+ = xstrdup (relocate_gdb_directory (TARGET_SYSTEM_ROOT,
+ TARGET_SYSTEM_ROOT_RELOCATABLE).c_str ());
- if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
+ if (*gdb_sysroot == '\0')
{
xfree (gdb_sysroot);
gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
}
- debug_file_directory = relocate_gdb_directory (DEBUGDIR,
- DEBUGDIR_RELOCATABLE);
+ debug_file_directory
+ = xstrdup (relocate_gdb_directory (DEBUGDIR,
+ DEBUGDIR_RELOCATABLE).c_str ());
gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
GDB_DATADIR_RELOCATABLE);
-#ifdef WITH_PYTHON_PATH
- {
- /* For later use in helping Python find itself. */
- char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
-
- python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
- xfree (tmp);
- }
+#ifdef WITH_PYTHON_LIBDIR
+ python_libdir = relocate_gdb_directory (WITH_PYTHON_LIBDIR,
+ PYTHON_LIBDIR_RELOCATABLE);
#endif
#ifdef RELOC_SRCDIR
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},
{"w", no_argument, NULL, OPT_WINDOWS},
{"windows", no_argument, NULL, OPT_WINDOWS},
{"statistics", no_argument, 0, OPT_STATISTICS},
- {"write", no_argument, &write_files, 1},
+ {"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},
#ifdef GDBTK
case 'z':
{
- extern int gdbtk_test (char *);
-
if (!gdbtk_test (optarg))
error (_("%s: unable to load tclcommand file \"%s\""),
gdb_program_name, optarg);
{
/* Set the external editor commands when gdb is farming out files
to be edited by another program. */
- extern char *external_editor_command;
-
external_editor_command = xstrdup (optarg);
break;
}
gdb_program_name);
}
}
+ write_files = (write_files_1 != 0);
if (batch_flag)
{
save_original_signals_state (quiet);
/* Try to set up an alternate signal stack for SIGSEGV handlers. */
- setup_alternate_signal_stack ();
+ gdb::alternate_signal_stack signal_stack;
/* Initialize all files. */
gdb_init (gdb_program_name);
}
/* Lookup gdbinit files. Note that the gdbinit file name may be
- overriden during file initialization, so get_init_files should 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)
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 && !inhibit_gdbinit)
- ret = catch_command_errors (source_script, system_gdbinit, 0);
+ 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 && !inhibit_gdbinit && !inhibit_home_gdbinit)
- ret = catch_command_errors (source_script, home_gdbinit, 0);
+ 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. */
for (i = 0; i < cmdarg_vec.size (); i++)
/* 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)
+ if (!local_gdbinit.empty ())
{
auto_load_local_gdbinit_pathname
- = gdb_realpath (local_gdbinit).release ();
+ = gdb_realpath (local_gdbinit.c_str ()).release ();
if (!inhibit_gdbinit && auto_load_local_gdbinit
- && file_is_auto_load_safe (local_gdbinit,
+ && file_is_auto_load_safe (local_gdbinit.c_str (),
_("auto-load: Loading .gdbinit "
"file \"%s\".\n"),
- local_gdbinit))
+ local_gdbinit.c_str ()))
{
auto_load_local_gdbinit_loaded = 1;
- ret = catch_command_errors (source_script, local_gdbinit, 0);
+ ret = catch_command_errors (source_script, local_gdbinit.c_str (), 0);
}
}
{
captured_command_loop ();
}
- catch (const gdb_exception_RETURN_MASK_ALL &ex)
+ catch (const gdb_exception &ex)
{
exception_print (gdb_stderr, ex);
}
{
captured_main (args);
}
- catch (const gdb_exception_RETURN_MASK_ALL &ex)
+ catch (const gdb_exception &ex)
{
exception_print (gdb_stderr, ex);
}
static void
print_gdb_help (struct ui_file *stream)
{
- const char *system_gdbinit;
- const char *home_gdbinit;
- const char *local_gdbinit;
+ std::vector<std::string> system_gdbinit;
+ std::string home_gdbinit;
+ std::string local_gdbinit;
get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
fputs_unfiltered (_("\n\
At startup, GDB reads the following init files and executes their commands:\n\
"), stream);
- if (system_gdbinit)
- fprintf_unfiltered (stream, _("\
- * system-wide init file: %s\n\
-"), system_gdbinit);
- if (home_gdbinit)
+ 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 += ", ";
+ }
+ fprintf_unfiltered (stream, _("\
+ * system-wide init files: %s\n\
+"), output.c_str ());
+ }
+ if (!home_gdbinit.empty ())
fprintf_unfiltered (stream, _("\
* user-specific init file: %s\n\
-"), home_gdbinit);
- if (local_gdbinit)
+"), home_gdbinit.c_str ());
+ if (!local_gdbinit.empty ())
fprintf_unfiltered (stream, _("\
* local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
-"), local_gdbinit);
+"), local_gdbinit.c_str ());
fputs_unfiltered (_("\n\
For more information, type \"help\" from within GDB, or consult the\n\
GDB manual (available as on-line info or a printed manual).\n\
projects / deliverable / binutils-gdb.git / blobdiff