You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "top.h"
#include "inferior.h"
-#include "terminal.h" /* for job_control*/
-#include <signal.h>
+#include "target.h"
+#include "terminal.h" /* for job_control */
+#include "signals.h"
#include "event-loop.h"
+#include "event-top.h"
+
+/* For dont_repeat() */
+#include "gdbcmd.h"
/* readline include files */
#include <readline/readline.h>
#include <readline/history.h>
+#include <signal.h>
+
/* readline defines this. */
#undef savestring
-extern void _initialize_event_loop PARAMS ((void));
+extern void _initialize_event_loop (void);
-static void command_line_handler PARAMS ((char *));
-static void command_line_handler_continuation PARAMS ((struct continuation_arg *));
-void gdb_readline2 PARAMS ((void));
-void pop_prompt PARAMS ((void));
-void push_prompt PARAMS ((char *, char *, char *));
-static void change_line_handler PARAMS ((void));
-static void change_annotation_level PARAMS ((void));
-static void command_handler PARAMS ((char *));
+static void rl_callback_read_char_wrapper (gdb_client_data client_data);
+static void command_line_handler (char *rl);
+static void command_line_handler_continuation (struct continuation_arg *arg);
+static void change_line_handler (void);
+static void change_annotation_level (void);
+static void command_handler (char *command);
+void cli_command_loop (void);
+static void async_do_nothing (gdb_client_data arg);
+static void async_disconnect (gdb_client_data arg);
+static void async_stop_sig (gdb_client_data arg);
+static void async_float_handler (gdb_client_data arg);
/* Signal handlers. */
-void handle_sigint PARAMS ((int));
-static void handle_sigquit PARAMS ((int));
-static void handle_sighup PARAMS ((int));
-static void handle_sigfpe PARAMS ((int));
-static void handle_sigwinch PARAMS ((int));
-/* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
-#ifndef STOP_SIGNAL
-#ifdef SIGTSTP
-#define STOP_SIGNAL SIGTSTP
-void handle_stop_sig PARAMS ((int));
-#endif
+static void handle_sigquit (int sig);
+static void handle_sighup (int sig);
+static void handle_sigfpe (int sig);
+#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
+static void handle_sigwinch (int sig);
#endif
/* Functions to be invoked by the event loop in response to
signals. */
-void async_request_quit PARAMS ((gdb_client_data));
-static void async_do_nothing PARAMS ((gdb_client_data));
-static void async_disconnect PARAMS ((gdb_client_data));
-static void async_float_handler PARAMS ((gdb_client_data));
-static void async_stop_sig PARAMS ((gdb_client_data));
-
-/* If this definition isn't overridden by the header files, assume
- that isatty and fileno exist on this system. */
-#ifndef ISATTY
-#define ISATTY(FP) (isatty (fileno (FP)))
-#endif
+static void async_do_nothing (gdb_client_data);
+static void async_disconnect (gdb_client_data);
+static void async_float_handler (gdb_client_data);
+static void async_stop_sig (gdb_client_data);
/* Readline offers an alternate interface, via callback
functions. These are all included in the file callback.c in the
line of input is ready. CALL_READLINE is to be set to the function
that readline offers as callback to the event_loop. */
-void (*input_handler) PARAMS ((char *));
-void (*call_readline) PARAMS ((void));
+void (*input_handler) (char *);
+void (*call_readline) (gdb_client_data);
/* Important variables for the event loop. */
annotation_level is 2. */
char *async_annotation_suffix;
+/* This is used to display the notification of the completion of an
+ asynchronous execution command. */
+int exec_done_display_p = 0;
+
/* This is the file descriptor for the input stream that GDB uses to
read commands from. */
int input_fd;
handlers mark these functions as ready to be executed and the event
loop, in a later iteration, calls them. See the function
invoke_async_signal_handler. */
-PTR sigint_token;
+void *sigint_token;
#ifdef SIGHUP
-PTR sighup_token;
+void *sighup_token;
#endif
-PTR sigquit_token;
-PTR sigfpe_token;
+void *sigquit_token;
+void *sigfpe_token;
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
-PTR sigwinch_token;
+void *sigwinch_token;
#endif
#ifdef STOP_SIGNAL
-PTR sigtstp_token;
+void *sigtstp_token;
#endif
-void mark_async_signal_handler_wrapper PARAMS ((void *));
-
/* Structure to save a partially entered command. This is used when
the user types '\' at the end of a command line. This is necessary
because each line of input is handled by a different call to
readline_input_state;
\f
+/* Wrapper function foe calling into the readline library. The event
+ loop expects the callback function to have a paramter, while readline
+ expects none. */
+static void
+rl_callback_read_char_wrapper (gdb_client_data client_data)
+{
+ rl_callback_read_char ();
+}
+
/* Initialize all the necessary variables, start the event loop,
register readline, and stdin, start the loop. */
void
-cli_command_loop ()
+cli_command_loop (void)
{
int length;
char *a_prompt;
if (async_command_editing_p)
{
/* Tell readline what the prompt to display is and what function it
- will need to call after a whole line is read. This also displays
- the first prompt.*/
+ will need to call after a whole line is read. This also displays
+ the first prompt. */
length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
a_prompt = (char *) xmalloc (length);
strcpy (a_prompt, PREFIX (0));
which the user sets editing on again, by restoring readline
handling of the input. */
static void
-change_line_handler ()
+change_line_handler (void)
{
+ /* NOTE: this operates on input_fd, not instream. If we are reading
+ commands from a file, instream will point to the file. However in
+ async mode, we always read commands from a file with editing
+ off. This means that the 'set editing on/off' will have effect
+ only on the interactive session. */
+
if (async_command_editing_p)
{
/* Turn on editing by using readline. */
- call_readline = rl_callback_read_char;
+ call_readline = rl_callback_read_char_wrapper;
input_handler = command_line_handler;
}
else
call_readline = gdb_readline2;
/* Set up the command handler as well, in case we are called as
- first thing from .gdbinit. */
+ first thing from .gdbinit. */
input_handler = command_line_handler;
}
-
- /* To tell the event loop to change the handler associated with the
- input file descriptor, we need to create a new event source,
- corresponding to the same fd, but with a new event handler
- function. */
- /* NOTE: this operates on input_fd, not instream. If we are reading
- commands from a file, instream will point to the file. However in
- async mode, we always read commands from a file with editing
- off. This means that the 'set editing on/off' will have effect
- only on the interactive session. */
- delete_file_handler (input_fd);
- add_file_handler (input_fd, (file_handler_func *) call_readline, 0);
}
/* Displays the prompt. The prompt that is displayed is the current
3. Other????
FIXME: 2. & 3. not implemented yet for async. */
void
-display_gdb_prompt (new_prompt)
- char *new_prompt;
+display_gdb_prompt (char *new_prompt)
{
int prompt_length = 0;
- char *gdb_prompt = get_prompt ();
+ char *gdb_prompt = get_prompt ();
+
+#ifdef UI_OUT
+ /* When an alternative interpreter has been installed, do not
+ display the comand prompt. */
+ if (interpreter_p)
+ return;
+#endif
+
+ if (target_executing && sync_execution)
+ {
+ /* This is to trick readline into not trying to display the
+ prompt. Even though we display the prompt using this
+ function, readline still tries to do its own display if we
+ don't call rl_callback_handler_install and
+ rl_callback_handler_remove (which readline detects because a
+ global variable is not set). If readline did that, it could
+ mess up gdb signal handlers for SIGINT. Readline assumes
+ that between calls to rl_set_signals and rl_clear_signals gdb
+ doesn't do anything with the signal handlers. Well, that's
+ not the case, because when the target executes we change the
+ SIGINT signal handler. If we allowed readline to display the
+ prompt, the signal handler change would happen exactly
+ between the calls to the above two functions.
+ Calling rl_callback_handler_remove(), does the job. */
+
+ rl_callback_handler_remove ();
+ return;
+ }
if (!new_prompt)
{
rl_callback_handler_remove ();
rl_callback_handler_install (new_prompt, input_handler);
}
+ /* new_prompt at this point can be the top of the stack or the one passed in */
else if (new_prompt)
{
/* Don't use a _filtered function here. It causes the assumed
'set annotate'. It pushes a new prompt (with prefix and suffix) on top
of the prompt stack, if the annotation level desired is 2, otherwise
it pops the top of the prompt stack when we want the annotation level
- to be the normal ones (1 or 2). */
+ to be the normal ones (1 or 0). */
static void
-change_annotation_level ()
+change_annotation_level (void)
{
char *prefix, *suffix;
strings, except when the annotation level is 2. Memory is allocated
within savestring for the new prompt. */
void
-push_prompt (prefix, prompt, suffix)
- char *prefix;
- char *prompt;
- char *suffix;
+push_prompt (char *prefix, char *prompt, char *suffix)
{
the_prompts.top++;
PREFIX (0) = savestring (prefix, strlen (prefix));
/* Pops the top of the prompt stack, and frees the memory allocated for it. */
void
-pop_prompt ()
+pop_prompt (void)
{
/* If we are not during a 'synchronous' execution command, in which
case, the top prompt would be empty. */
free (SUFFIX (0));
the_prompts.top--;
}
+
+/* When there is an event ready on the stdin file desriptor, instead
+ of calling readline directly throught the callback function, or
+ instead of calling gdb_readline2, give gdb a chance to detect
+ errors and do something. */
+void
+stdin_event_handler (int error, gdb_client_data client_data)
+{
+ if (error)
+ {
+ printf_unfiltered ("error detected on stdin\n");
+ delete_file_handler (input_fd);
+ discard_all_continuations ();
+ /* If stdin died, we may as well kill gdb. */
+ quit_command ((char *) 0, stdin == instream);
+ }
+ else
+ (*call_readline) (client_data);
+}
+
+/* Re-enable stdin after the end of an execution command in
+ synchronous mode, or after an error from the target, and we aborted
+ the exec operation. */
+
+void
+async_enable_stdin (void *dummy)
+{
+ /* See NOTE in async_disable_stdin() */
+ /* FIXME: cagney/1999-09-27: Call this before clearing
+ sync_execution. Current target_terminal_ours() implementations
+ check for sync_execution before switching the terminal. */
+ target_terminal_ours ();
+ pop_prompt ();
+ sync_execution = 0;
+}
+
+/* Disable reads from stdin (the console) marking the command as
+ synchronous. */
+
+void
+async_disable_stdin (void)
+{
+ sync_execution = 1;
+ push_prompt ("", "", "");
+ /* FIXME: cagney/1999-09-27: At present this call is technically
+ redundant since infcmd.c and infrun.c both already call
+ target_terminal_inferior(). As the terminal handling (in
+ sync/async mode) is refined, the duplicate calls can be
+ eliminated (Here or in infcmd.c/infrun.c). */
+ target_terminal_inferior ();
+ /* Add the reinstate of stdin to the list of cleanups to be done
+ in case the target errors out and dies. These cleanups are also
+ done in case of normal successful termination of the execution
+ command, by complete_execution(). */
+ make_exec_error_cleanup (async_enable_stdin, NULL);
+}
\f
+
/* Handles a gdb command. This function is called by
command_line_handler, which has processed one or more input lines
into COMMAND. */
function. The command_loop function will be obsolete when we
switch to use the event loop at every execution of gdb. */
static void
-command_handler (command)
- char *command;
+command_handler (char *command)
{
struct cleanup *old_chain;
int stdin_is_tty = ISATTY (stdin);
quit_flag = 0;
if (instream == stdin && stdin_is_tty)
reinitialize_more_filter ();
- old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0);
+ old_chain = make_cleanup (command_loop_marker, 0);
#if defined(TUI)
insert_mode = 0;
}
execute_command (command, instream == stdin);
-
+
/* Set things up for this function to be compete later, once the
executin has completed, if we are doing an execution command,
otherwise, just go ahead and finish. */
- if (target_has_async && target_executing)
+ if (target_can_async_p () && target_executing)
{
- arg1 =
+ arg1 =
(struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
- arg2 =
+ arg2 =
(struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
arg1->next = arg2;
arg2->next = NULL;
- arg1->data = (PTR) time_at_cmd_start;
- arg2->data = (PTR) space_at_cmd_start;
+ arg1->data.integer = time_at_cmd_start;
+ arg2->data.integer = space_at_cmd_start;
add_continuation (command_line_handler_continuation, arg1);
}
/* Do any commands attached to breakpoint we stopped at. Only if we
are always running synchronously. Or if we have just executed a
command that doesn't start the target. */
- if (!target_has_async || !target_executing)
+ if (!target_can_async_p () || !target_executing)
{
bpstat_do_actions (&stop_bpstat);
do_cleanups (old_chain);
-
+
if (display_time)
{
long cmd_time = get_run_time () - time_at_cmd_start;
are always running synchronously. Or if we have just executed a
command that doesn't start the target. */
void
-command_line_handler_continuation (arg)
- struct continuation_arg *arg;
-{
+command_line_handler_continuation (struct continuation_arg *arg)
+{
extern int display_time;
extern int display_space;
- long time_at_cmd_start = (long) arg->data;
- long space_at_cmd_start = (long) arg->next->data;
+ long time_at_cmd_start = arg->data.longint;
+ long space_at_cmd_start = arg->next->data.longint;
bpstat_do_actions (&stop_bpstat);
- /*do_cleanups (old_chain);*/ /*?????FIXME?????*/
-
+ /*do_cleanups (old_chain); *//*?????FIXME????? */
+
if (display_time)
{
long cmd_time = get_run_time () - time_at_cmd_start;
obsolete once we use the event loop as the default mechanism in
GDB. */
static void
-command_line_handler (rl)
- char *rl;
+command_line_handler (char *rl)
{
static char *linebuffer = 0;
static unsigned linelength = 0;
register char *p;
char *p1;
- int change_prompt = 0;
extern char *line;
extern int linesize;
char *nline;
p = readline_input_state.linebuffer_ptr;
free (readline_input_state.linebuffer);
more_to_come = 0;
- change_prompt = 1;
+ pop_prompt ();
}
#ifdef STOP_SIGNAL
free (rl); /* Allocated in readline. */
- if (p == linebuffer || *(p - 1) == '\\')
+ if (*(p - 1) == '\\')
{
- /* We come here also if the line entered is empty (just a 'return') */
p--; /* Put on top of '\'. */
if (*p == '\\')
/* We will not invoke a execute_command if there is more
input expected to complete the command. So, we need to
print an empty prompt here. */
- display_gdb_prompt ("");
more_to_come = 1;
+ push_prompt ("", "", "");
+ display_gdb_prompt (0);
+ return;
}
}
will become obsolete when the event loop is made the default
execution for gdb. */
void
-gdb_readline2 ()
+gdb_readline2 (gdb_client_data client_data)
{
int c;
char *result;
int input_index = 0;
int result_size = 80;
+ static int done_once = 0;
+
+ /* Unbuffer the input stream, so that, later on, the calls to fgetc
+ fetch only one char at the time from the stream. The fgetc's will
+ get up to the first newline, but there may be more chars in the
+ stream after '\n'. If we buffer the input and fgetc drains the
+ stream, getting stuff beyond the newline as well, a select, done
+ afterwards will not trigger. */
+ if (!done_once && !ISATTY (instream))
+ {
+ setbuf (instream, NULL);
+ done_once = 1;
+ }
result = (char *) xmalloc (result_size);
init_signals will become obsolete as we move to have to event loop
as the default for gdb. */
void
-async_init_signals ()
-{
+async_init_signals (void)
+{
signal (SIGINT, handle_sigint);
sigint_token =
create_async_signal_handler (async_request_quit, NULL);
}
-void
-mark_async_signal_handler_wrapper (token)
- void *token;
+void
+mark_async_signal_handler_wrapper (void *token)
{
- mark_async_signal_handler ((async_signal_handler *) token);
+ mark_async_signal_handler ((struct async_signal_handler *) token);
}
/* Tell the event loop what to do if SIGINT is received.
See event-signal.c. */
-void
-handle_sigint (sig)
- int sig;
+void
+handle_sigint (int sig)
{
signal (sig, handle_sigint);
}
/* Do the quit. All the checks have been done by the caller. */
-void
-async_request_quit (arg)
- gdb_client_data arg;
+void
+async_request_quit (gdb_client_data arg)
{
quit_flag = 1;
#ifdef REQUEST_QUIT
/* Tell the event loop what to do if SIGQUIT is received.
See event-signal.c. */
-static void
-handle_sigquit (sig)
- int sig;
+static void
+handle_sigquit (int sig)
{
mark_async_signal_handler_wrapper (sigquit_token);
signal (sig, handle_sigquit);
}
/* Called by the event loop in response to a SIGQUIT. */
-static void
-async_do_nothing (arg)
- gdb_client_data arg;
+static void
+async_do_nothing (gdb_client_data arg)
{
/* Empty function body. */
}
#ifdef SIGHUP
/* Tell the event loop what to do if SIGHUP is received.
See event-signal.c. */
-static void
+static void
handle_sighup (sig)
int sig;
{
}
/* Called by the event loop to process a SIGHUP */
-static void
-async_disconnect (arg)
- gdb_client_data arg;
+static void
+async_disconnect (gdb_client_data arg)
{
catch_errors (quit_cover, NULL,
"Could not kill the program being debugged",
#endif
#ifdef STOP_SIGNAL
-void handle_stop_sig (sig)
- int sig;
+void
+handle_stop_sig (int sig)
{
- mark_async_signal_handler_wrapper (sigtstp_token);
- signal (sig, handle_stop_sig);
+ mark_async_signal_handler_wrapper (sigtstp_token);
+ signal (sig, handle_stop_sig);
}
static void
-async_stop_sig (arg)
- gdb_client_data arg;
+async_stop_sig (gdb_client_data arg)
{
- char *prompt = get_prompt ();
+ char *prompt = get_prompt ();
#if STOP_SIGNAL == SIGTSTP
signal (SIGTSTP, SIG_DFL);
+#if HAVE_SIGPROCMASK
+ {
+ sigset_t zero;
+ sigemptyset (&zero);
+ sigprocmask (SIG_SETMASK, &zero, 0);
+ }
+#else
sigsetmask (0);
+#endif
kill (getpid (), SIGTSTP);
signal (SIGTSTP, handle_stop_sig);
#else
/* Tell the event loop what to do if SIGFPE is received.
See event-signal.c. */
-static void
-handle_sigfpe (sig)
- int sig;
+static void
+handle_sigfpe (int sig)
{
mark_async_signal_handler_wrapper (sigfpe_token);
signal (sig, handle_sigfpe);
}
/* Event loop will call this functin to process a SIGFPE. */
-static void
-async_float_handler (arg)
- gdb_client_data arg;
+static void
+async_float_handler (gdb_client_data arg)
{
/* This message is based on ANSI C, section 4.7. Note that integer
divide by zero causes this, so "float" is a misnomer. */
/* Tell the event loop what to do if SIGWINCH is received.
See event-signal.c. */
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
-static void
-handle_sigwinch (sig)
- int sig;
+static void
+handle_sigwinch (int sig)
{
mark_async_signal_handler_wrapper (sigwinch_token);
signal (sig, handle_sigwinch);
/* Called by do_setshow_command. */
/* ARGSUSED */
void
-set_async_editing_command (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
+set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c)
{
change_line_handler ();
}
/* Called by do_setshow_command. */
/* ARGSUSED */
void
-set_async_annotation_level (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
+set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c)
{
change_annotation_level ();
}
/* Called by do_setshow_command. */
/* ARGSUSED */
void
-set_async_prompt (args, from_tty, c)
- char *args;
- int from_tty;
- struct cmd_list_element *c;
+set_async_prompt (char *args, int from_tty, struct cmd_list_element *c)
{
PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt));
}
/* Set things up for readline to be invoked via the alternate
interface, i.e. via a callback function (rl_callback_read_char),
- and hook up instream to the event loop.*/
+ and hook up instream to the event loop. */
void
-_initialize_event_loop ()
+_initialize_event_loop (void)
{
- if (async_p)
+ if (event_loop_p)
{
- /* When a character is detected on instream by select or poll,
- readline will be invoked via this callback function. */
- call_readline = rl_callback_read_char;
+ /* If the input stream is connected to a terminal, turn on
+ editing. */
+ if (ISATTY (instream))
+ {
+ /* Tell gdb that we will be using the readline library. This
+ could be overwritten by a command in .gdbinit like 'set
+ editing on' or 'off'. */
+ async_command_editing_p = 1;
+
+ /* When a character is detected on instream by select or
+ poll, readline will be invoked via this callback
+ function. */
+ call_readline = rl_callback_read_char_wrapper;
+ }
+ else
+ {
+ async_command_editing_p = 0;
+ call_readline = gdb_readline2;
+ }
/* When readline has read an end-of-line character, it passes
- the complete line to gdb for processing. command_line_handler
- is the function that does this. */
+ the complete line to gdb for processing. command_line_handler
+ is the function that does this. */
input_handler = command_line_handler;
/* Tell readline to use the same input stream that gdb uses. */
/* Now we need to create the event sources for the input file
descriptor. */
/* At this point in time, this is the only event source that we
- register with the even loop. Another source is going to be
- the target program (inferior), but that must be registered
- only when it actually exists (I.e. after we say 'run' or
- after we connect to a remote target. */
- add_file_handler (input_fd, (file_handler_func *) call_readline, 0);
-
- /* Tell gdb that we will be using the readline library. This
- could be overwritten by a command in .gdbinit like 'set
- editing on' or 'off'. */
- async_command_editing_p = 1;
+ register with the even loop. Another source is going to be
+ the target program (inferior), but that must be registered
+ only when it actually exists (I.e. after we say 'run' or
+ after we connect to a remote target. */
+ add_file_handler (input_fd, stdin_event_handler, 0);
}
}
-
projects / deliverable / binutils-gdb.git / blobdiff