/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1986-2014 Free Software Foundation, Inc.
+ Copyright (C) 1986-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "observer.h"
#include "maint.h"
#include "filenames.h"
+#include "frame.h"
/* readline include files. */
#include "readline/readline.h"
#include "tracepoint.h"
#include "inf-loop.h"
+#if defined(TUI)
+# include "tui/tui.h"
+#endif
+
extern void initialize_all_files (void);
#define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
/* Hooks for alternate command interfaces. */
-/* Called after most modules have been initialized, but before taking
- users command file.
-
- If the UI fails to initialize and it wants GDB to continue using
- the default UI, then it should clear this hook before returning. */
-
-void (*deprecated_init_ui_hook) (char *argv0);
-
/* This hook is called from within gdb's many mini-event loops which
could steal control from a real user interface's event loop. It
returns non-zero if the user is requesting a detach, zero
window and it can close it. */
void (*deprecated_readline_begin_hook) (char *, ...);
-char *(*deprecated_readline_hook) (char *);
+char *(*deprecated_readline_hook) (const char *);
void (*deprecated_readline_end_hook) (void);
/* Called as appropriate to notify the interface that we have attached
void (*deprecated_interactive_hook) (void);
-/* Tell the GUI someone changed the register REGNO. -1 means
- that the caller does not know which register changed or
- that several registers have changed (see value_assign). */
-void (*deprecated_register_changed_hook) (int regno);
-
/* Called when going to wait for the target. Usually allows the GUI
to run while waiting for target events. */
do_restore_instream_cleanup (void *stream)
{
/* Restore the previous input stream. */
- instream = stream;
+ instream = (FILE *) stream;
}
/* Read commands from STREAM. */
check_frame_language_change (void)
{
static int warned = 0;
+ struct frame_info *frame;
/* First make sure that a new frame has been selected, in case the
command or the hooks changed the program state. */
- deprecated_safe_get_selected_frame ();
+ frame = deprecated_safe_get_selected_frame ();
if (current_language != expected_language)
{
if (language_mode == language_mode_auto && info_verbose)
{
enum language flang;
- flang = get_frame_language ();
+ flang = get_frame_language (frame);
if (!warned
&& flang != language_unknown
&& flang != current_language->la_language)
/* See top.h. */
+void
+wait_sync_command_done (void)
+{
+ while (gdb_do_one_event () >= 0)
+ if (!sync_execution)
+ break;
+}
+
+/* See top.h. */
+
void
maybe_wait_sync_command_done (int was_sync)
{
just ran a synchronous command that started the target, wait
for that command to end. */
if (!interpreter_async && !was_sync && sync_execution)
- {
- while (gdb_do_one_event () >= 0)
- if (!sync_execution)
- break;
- }
+ wait_sync_command_done ();
}
/* Execute the line P as a command, in the current user context.
deprecated_cmd_warning (line);
/* c->user_commands would be NULL in the case of a python command. */
- if (c->class == class_user && c->user_commands)
+ if (c->theclass == class_user && c->user_commands)
execute_user_command (c, arg);
else if (c->type == set_cmd)
do_set_command (arg, from_tty, c);
A NULL return means end of file. */
char *
-gdb_readline (char *prompt_arg)
+gdb_readline (const char *prompt_arg)
{
int c;
char *result;
}
/* The variable associated with the "set/show history size"
- command. */
-static unsigned int history_size_setshow_var;
+ command. The value -1 means unlimited, and -2 means undefined. */
+static int history_size_setshow_var = -2;
static void
show_history_size (struct ui_file *file, int from_tty,
value);
}
+/* Variable associated with the "history remove-duplicates" option.
+ The value -1 means unlimited. */
+static int history_remove_duplicates = 0;
+
+static void
+show_history_remove_duplicates (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file,
+ _("The number of history entries to look back at for "
+ "duplicates is %s.\n"),
+ value);
+}
+
static char *history_filename;
static void
show_history_filename (struct ui_file *file, int from_tty,
return. */
static void (*saved_after_char_processing_hook) (void);
+
+/* The number of nested readline secondary prompts that are currently
+ active. */
+
+static int gdb_secondary_prompt_depth = 0;
+
+/* See top.h. */
+
+int
+gdb_in_secondary_prompt_p (void)
+{
+ return gdb_secondary_prompt_depth > 0;
+}
+
+
/* This function is called when readline has seen a complete line of
text. */
/* Prevent parts of the prompt from being redisplayed if annotations
are enabled, and readline's state getting out of sync. We'll
- restore it in gdb_readline_wrapper_cleanup. */
+ reinstall the callback handler, which puts the terminal in raw
+ mode (or in readline lingo, in prepped state), when we're next
+ ready to process user input, either in display_gdb_prompt, or if
+ we're handling an asynchronous target event and running in the
+ background, just before returning to the event loop to process
+ further input (or more target events). */
if (async_command_editing_p)
- rl_callback_handler_remove ();
+ gdb_rl_callback_handler_remove ();
}
struct gdb_readline_wrapper_cleanup
static void
gdb_readline_wrapper_cleanup (void *arg)
{
- struct gdb_readline_wrapper_cleanup *cleanup = arg;
+ struct gdb_readline_wrapper_cleanup *cleanup
+ = (struct gdb_readline_wrapper_cleanup *) arg;
rl_already_prompted = cleanup->already_prompted_orig;
gdb_assert (input_handler == gdb_readline_wrapper_line);
input_handler = cleanup->handler_orig;
- /* Reinstall INPUT_HANDLER in readline, without displaying a
- prompt. */
- if (async_command_editing_p)
- rl_callback_handler_install (NULL, input_handler);
+ /* Don't restore our input handler in readline yet. That would make
+ readline prep the terminal (putting it in raw mode), while the
+ line we just read may trigger execution of a command that expects
+ the terminal in the default cooked/canonical mode, such as e.g.,
+ running Python's interactive online help utility. See
+ gdb_readline_wrapper_line for when we'll reinstall it. */
gdb_readline_wrapper_result = NULL;
gdb_readline_wrapper_done = 0;
+ gdb_secondary_prompt_depth--;
+ gdb_assert (gdb_secondary_prompt_depth >= 0);
after_char_processing_hook = saved_after_char_processing_hook;
saved_after_char_processing_hook = NULL;
if (cleanup->target_is_async_orig)
- target_async (inferior_event_handler, 0);
+ target_async (1);
xfree (cleanup);
}
char *
-gdb_readline_wrapper (char *prompt)
+gdb_readline_wrapper (const char *prompt)
{
struct cleanup *back_to;
struct gdb_readline_wrapper_cleanup *cleanup;
char *retval;
- cleanup = xmalloc (sizeof (*cleanup));
+ cleanup = XNEW (struct gdb_readline_wrapper_cleanup);
cleanup->handler_orig = input_handler;
input_handler = gdb_readline_wrapper_line;
cleanup->target_is_async_orig = target_is_async_p ();
+ gdb_secondary_prompt_depth++;
back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup);
if (cleanup->target_is_async_orig)
- target_async (NULL, NULL);
+ target_async (0);
/* Display our prompt and prevent double prompt display. */
display_gdb_prompt (prompt);
return rl_newline (1, key);
}
-\f
+
+/* Number of user commands executed during this session. */
+
+static int command_count = 0;
+
+/* Add the user command COMMAND to the input history list. */
+
+void
+gdb_add_history (const char *command)
+{
+ command_count++;
+
+ if (history_remove_duplicates != 0)
+ {
+ int lookbehind;
+ int lookbehind_threshold;
+
+ /* The lookbehind threshold for finding a duplicate history entry is
+ bounded by command_count because we can't meaningfully delete
+ history entries that are already stored in the history file since
+ the history file is appended to. */
+ if (history_remove_duplicates == -1
+ || history_remove_duplicates > command_count)
+ lookbehind_threshold = command_count;
+ else
+ lookbehind_threshold = history_remove_duplicates;
+
+ using_history ();
+ for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
+ {
+ HIST_ENTRY *temp = previous_history ();
+
+ if (temp == NULL)
+ break;
+
+ if (strcmp (temp->line, command) == 0)
+ {
+ HIST_ENTRY *prev = remove_history (where_history ());
+ command_count--;
+ free_history_entry (prev);
+ break;
+ }
+ }
+ using_history ();
+ }
+
+ add_history (command);
+}
+
+/* Safely append new history entries to the history file in a corruption-free
+ way using an intermediate local history file. */
+
+static void
+gdb_safe_append_history (void)
+{
+ int ret, saved_errno;
+ char *local_history_filename;
+ struct cleanup *old_chain;
+
+ local_history_filename
+ = xstrprintf ("%s-gdb%d~", history_filename, getpid ());
+ old_chain = make_cleanup (xfree, local_history_filename);
+
+ ret = rename (history_filename, local_history_filename);
+ saved_errno = errno;
+ if (ret < 0 && saved_errno != ENOENT)
+ {
+ warning (_("Could not rename %s to %s: %s"),
+ history_filename, local_history_filename,
+ safe_strerror (saved_errno));
+ }
+ else
+ {
+ if (ret < 0)
+ {
+ /* If the rename failed with ENOENT then either the global history
+ file never existed in the first place or another GDB process is
+ currently appending to it (and has thus temporarily renamed it).
+ Since we can't distinguish between these two cases, we have to
+ conservatively assume the first case and therefore must write out
+ (not append) our known history to our local history file and try
+ to move it back anyway. Otherwise a global history file would
+ never get created! */
+ gdb_assert (saved_errno == ENOENT);
+ write_history (local_history_filename);
+ }
+ else
+ {
+ append_history (command_count, local_history_filename);
+ if (history_is_stifled ())
+ history_truncate_file (local_history_filename, history_max_entries);
+ }
+
+ ret = rename (local_history_filename, history_filename);
+ saved_errno = errno;
+ if (ret < 0 && saved_errno != EEXIST)
+ warning (_("Could not rename %s to %s: %s"),
+ local_history_filename, history_filename,
+ safe_strerror (saved_errno));
+ }
+
+ do_cleanups (old_chain);
+}
+
/* Read one line from the command input stream `instream'
into the local static buffer `linebuffer' (whose current length
is `linelength').
simple input as the user has requested. */
char *
-command_line_input (char *prompt_arg, int repeat, char *annotation_suffix)
+command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix)
{
static char *linebuffer = 0;
static unsigned linelength = 0;
+ const char *prompt = prompt_arg;
char *p;
char *p1;
char *rl;
- char *local_prompt = prompt_arg;
char *nline;
char got_eof = 0;
if (annotation_level > 1 && instream == stdin)
{
- local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg))
- + strlen (annotation_suffix) + 40);
- if (prompt_arg == NULL)
+ char *local_prompt;
+
+ local_prompt
+ = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
+ + strlen (annotation_suffix) + 40);
+ if (prompt == NULL)
local_prompt[0] = '\0';
else
- strcpy (local_prompt, prompt_arg);
+ strcpy (local_prompt, prompt);
strcat (local_prompt, "\n\032\032");
strcat (local_prompt, annotation_suffix);
strcat (local_prompt, "\n");
+
+ prompt = local_prompt;
}
if (linebuffer == 0)
/* Don't use fancy stuff if not talking to stdin. */
if (deprecated_readline_hook && input_from_terminal_p ())
{
- rl = (*deprecated_readline_hook) (local_prompt);
+ rl = (*deprecated_readline_hook) (prompt);
}
else if (command_editing_p && input_from_terminal_p ())
{
- rl = gdb_readline_wrapper (local_prompt);
+ rl = gdb_readline_wrapper (prompt);
}
else
{
- rl = gdb_readline (local_prompt);
+ rl = gdb_readline (prompt);
}
if (annotation_level > 1 && instream == stdin)
break;
p--; /* Put on top of '\'. */
- local_prompt = (char *) 0;
+ prompt = NULL;
}
#ifdef STOP_SIGNAL
if (expanded < 0)
{
xfree (history_value);
- return command_line_input (prompt_arg, repeat,
+ return command_line_input (prompt, repeat,
annotation_suffix);
}
if (strlen (history_value) > linelength)
/* Add line to history if appropriate. */
if (*linebuffer && input_from_terminal_p ())
- add_history (linebuffer);
+ gdb_add_history (linebuffer);
/* Save into global buffer if appropriate. */
if (repeat)
{
if (linelength > saved_command_line_size)
{
- saved_command_line = xrealloc (saved_command_line, linelength);
+ saved_command_line
+ = (char *) xrealloc (saved_command_line, linelength);
saved_command_line_size = linelength;
}
strcpy (saved_command_line, linebuffer);
/* Second line is a copyright notice. */
fprintf_filtered (stream,
- "Copyright (C) 2014 Free Software Foundation, Inc.\n");
+ "Copyright (C) 2015 Free Software Foundation, Inc.\n");
/* Following the copyright is a brief statement that the program is
free software, that users are free to copy and change it on
fprintf_filtered (stream, _("\
--with-system-gdbinit=%s%s\n\
"), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
-#if HAVE_ZLIB_H
- fprintf_filtered (stream, _("\
- --with-zlib\n\
-"));
-#else
- fprintf_filtered (stream, _("\
- --without-zlib\n\
-"));
-#endif
#if HAVE_LIBBABELTRACE
fprintf_filtered (stream, _("\
--with-babeltrace\n\
static int
kill_or_detach (struct inferior *inf, void *args)
{
- struct qt_args *qt = args;
+ struct qt_args *qt = (struct qt_args *) args;
struct thread_info *thread;
if (inf->pid == 0)
static int
print_inferior_quit_action (struct inferior *inf, void *arg)
{
- struct ui_file *stb = arg;
+ struct ui_file *stb = (struct ui_file *) arg;
if (inf->pid == 0)
return 0;
return qr;
}
+/* Prepare to exit GDB cleanly by undoing any changes made to the
+ terminal so that we leave the terminal in the state we acquired it. */
+
+static void
+undo_terminal_modifications_before_exit (void)
+{
+ target_terminal_ours ();
+#if defined(TUI)
+ tui_disable ();
+#endif
+ if (async_command_editing_p)
+ gdb_disable_readline ();
+}
+
+
/* Quit without asking for confirmation. */
void
{
int exit_code = 0;
struct qt_args qt;
- volatile struct gdb_exception ex;
+
+ undo_terminal_modifications_before_exit ();
/* An optional expression may be used to cause gdb to terminate with the
value of that expression. */
qt.args = args;
qt.from_tty = from_tty;
- /* Wrappers to make the code below a bit more readable. */
-#define DO_TRY \
- TRY_CATCH (ex, RETURN_MASK_ALL)
-
-#define DO_PRINT_EX \
- if (ex.reason < 0) \
- exception_print (gdb_stderr, ex)
-
/* We want to handle any quit errors and exit regardless. */
/* Get out of tfind mode, and kill or detach all inferiors. */
- DO_TRY
+ TRY
{
disconnect_tracing ();
iterate_over_inferiors (kill_or_detach, &qt);
}
- DO_PRINT_EX;
+ CATCH (ex, RETURN_MASK_ALL)
+ {
+ exception_print (gdb_stderr, ex);
+ }
+ END_CATCH
/* Give all pushed targets a chance to do minimal cleanup, and pop
them all out. */
- DO_TRY
+ TRY
{
pop_all_targets ();
}
- DO_PRINT_EX;
+ CATCH (ex, RETURN_MASK_ALL)
+ {
+ exception_print (gdb_stderr, ex);
+ }
+ END_CATCH
/* Save the history information if it is appropriate to do so. */
- DO_TRY
+ TRY
{
if (write_history_p && history_filename
&& input_from_terminal_p ())
- write_history (history_filename);
+ gdb_safe_append_history ();
+ }
+ CATCH (ex, RETURN_MASK_ALL)
+ {
+ exception_print (gdb_stderr, ex);
}
- DO_PRINT_EX;
+ END_CATCH
/* Do any final cleanups before exiting. */
- DO_TRY
+ TRY
{
do_final_cleanups (all_cleanups ());
}
- DO_PRINT_EX;
+ CATCH (ex, RETURN_MASK_ALL)
+ {
+ exception_print (gdb_stderr, ex);
+ }
+ END_CATCH
exit (exit_code);
}
}
}
-/* Called by do_setshow_command. */
-static void
-set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
-{
- /* Readline's history interface works with 'int', so it can only
- handle history sizes up to INT_MAX. The command itself is
- uinteger, so UINT_MAX means "unlimited", but we only get that if
- the user does "set history size 0" -- "set history size <UINT_MAX>"
- throws out-of-range. */
- if (history_size_setshow_var > INT_MAX
- && history_size_setshow_var != UINT_MAX)
- {
- unsigned int new_value = history_size_setshow_var;
+/* Update the size of our command history file to HISTORY_SIZE.
- /* Restore previous value before throwing. */
- if (history_is_stifled ())
- history_size_setshow_var = history_max_entries;
- else
- history_size_setshow_var = UINT_MAX;
+ A HISTORY_SIZE of -1 stands for unlimited. */
- error (_("integer %u out of range"), new_value);
- }
+static void
+set_readline_history_size (int history_size)
+{
+ gdb_assert (history_size >= -1);
- /* Commit the new value to readline's history. */
- if (history_size_setshow_var == UINT_MAX)
+ if (history_size == -1)
unstifle_history ();
else
- stifle_history (history_size_setshow_var);
+ stifle_history (history_size);
+}
+
+/* Called by do_setshow_command. */
+static void
+set_history_size_command (char *args, int from_tty, struct cmd_list_element *c)
+{
+ set_readline_history_size (history_size_setshow_var);
}
void
{
char *tmpenv;
- tmpenv = getenv ("HISTSIZE");
+ tmpenv = getenv ("GDBHISTSIZE");
if (tmpenv)
{
- int var;
-
- var = atoi (tmpenv);
- if (var < 0)
- {
- /* Prefer ending up with no history rather than overflowing
- readline's history interface, which uses signed 'int'
- everywhere. */
- var = 0;
- }
-
- history_size_setshow_var = var;
+ long var;
+ int saved_errno;
+ char *endptr;
+
+ tmpenv = skip_spaces (tmpenv);
+ errno = 0;
+ var = strtol (tmpenv, &endptr, 10);
+ saved_errno = errno;
+ endptr = skip_spaces (endptr);
+
+ /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
+ empty string, a negative number or a huge positive number (larger than
+ INT_MAX) then set the history size to unlimited. Otherwise set our
+ history size to the number we have read. This behavior is consistent
+ with how bash handles HISTSIZE. */
+ if (*endptr != '\0')
+ ;
+ else if (*tmpenv == '\0'
+ || var < 0
+ || var > INT_MAX
+ /* On targets where INT_MAX == LONG_MAX, we have to look at
+ errno after calling strtol to distinguish between a value that
+ is exactly INT_MAX and an overflowing value that was clamped
+ to INT_MAX. */
+ || (var == INT_MAX && saved_errno == ERANGE))
+ history_size_setshow_var = -1;
+ else
+ history_size_setshow_var = var;
}
- /* If the init file hasn't set a size yet, pick the default. */
- else if (history_size_setshow_var == 0)
+
+ /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
+ default. */
+ if (history_size_setshow_var == -2)
history_size_setshow_var = 256;
- /* Note that unlike "set history size 0", "HISTSIZE=0" really sets
- the history size to 0... */
- stifle_history (history_size_setshow_var);
+ set_readline_history_size (history_size_setshow_var);
tmpenv = getenv ("GDBHISTFILE");
if (tmpenv)
rl_completion_entry_function = readline_line_completion_function;
rl_completer_word_break_characters = default_word_break_characters ();
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
+ rl_completion_display_matches_hook = cli_display_match_list;
rl_readline_name = "gdb";
rl_terminal_name = getenv ("TERM");
show_write_history_p,
&sethistlist, &showhistlist);
- add_setshow_uinteger_cmd ("size", no_class, &history_size_setshow_var, _("\
+ add_setshow_zuinteger_unlimited_cmd ("size", no_class,
+ &history_size_setshow_var, _("\
Set the size of the command history,"), _("\
Show the size of the command history,"), _("\
ie. the number of previous commands to keep a record of.\n\
If set to \"unlimited\", the number of commands kept in the history\n\
list is unlimited. This defaults to the value of the environment\n\
-variable \"HISTSIZE\", or to 256 if this variable is not set."),
+variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
set_history_size_command,
show_history_size,
&sethistlist, &showhistlist);
+ add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
+ &history_remove_duplicates, _("\
+Set how far back in history to look for and remove duplicate entries."), _("\
+Show how far back in history to look for and remove duplicate entries."), _("\
+If set to a nonzero value N, GDB will look back at the last N history entries\n\
+and remove the first history entry that is a duplicate of the most recent\n\
+entry, each time a new history entry is added.\n\
+If set to \"unlimited\", this lookbehind is unbounded.\n\
+Only history entries added during this session are considered for removal.\n\
+If set to 0, removal of duplicate history entries is disabled.\n\
+By default this option is set to 0."),
+ NULL,
+ show_history_remove_duplicates,
+ &sethistlist, &showhistlist);
+
add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
Set the filename in which to record the command history"), _("\
Show the filename in which to record the command history"), _("\
initialize_targets (); /* Setup target_terminal macros for utils.c. */
initialize_utils (); /* Make errors and warnings possible. */
+ init_page_info ();
+
/* Here is where we call all the _initialize_foo routines. */
initialize_all_files ();
initialize_inferiors ();
initialize_current_architecture ();
init_cli_cmds();
- initialize_event_loop ();
init_main (); /* But that omits this file! Do it now. */
initialize_stdin_serial ();
+ /* Take a snapshot of our tty state before readline/ncurses have had a chance
+ to alter it. */
+ set_initial_gdb_ttystate ();
+
async_init_signals ();
/* We need a default language for parsing expressions, so simple
set_language (language_c);
expected_language = current_language; /* Don't warn about the change. */
- /* Allow another UI to initialize. If the UI fails to initialize,
- and it wants GDB to revert to the CLI, it should clear
- deprecated_init_ui_hook. */
- if (deprecated_init_ui_hook)
- deprecated_init_ui_hook (argv0);
-
/* Python initialization, for example, can require various commands to be
installed. For example "info pretty-printer" needs the "info"
prefix to be installed. Keep things simple and just do final
projects / deliverable / binutils-gdb.git / blobdiff