void
command_line_handler (char *rl)
{
struct buffer *line_buffer = get_command_line_buffer ();
struct ui *ui = current_ui;
char *cmd;
cmd = handle_line_of_input (line_buffer, rl, 1, "prompt");
if (cmd == (char *) EOF)
{
/* stdin closed. The connection with the terminal is gone.
This happens at the end of a testsuite run, after Expect has
hung up but GDB is still alive. In such a case, we just quit
gdb killing the inferior program too. */
printf_unfiltered ("quit\n");
execute_command ("quit", 1);
}
else if (cmd == NULL)
{
/* We don't have a full line yet. Print an empty prompt. */
display_gdb_prompt ("");
}
else
{
ui->prompt_state = PROMPT_NEEDED;
command_handler (cmd);
if (ui->prompt_state != PROMPTED)
display_gdb_prompt (0);
}
}
/* Initialize all the necessary variables, start the event loop,
register readline, and stdin, start the loop. */
void
cli_command_loop (void *data /* unused */)
{
int length;
char *a_prompt;
char *gdb_prompt = get_prompt ();
/* If we are using readline, set things up and display the first
prompt, otherwise just print the 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. */
length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
a_prompt = (char *) xmalloc (length);
strcpy (a_prompt, PREFIX (0));
strcat (a_prompt, gdb_prompt);
strcat (a_prompt, SUFFIX (0));
rl_callback_handler_install (a_prompt, input_handler);
}
else
display_gdb_prompt (0);
/* Now it's time to start the event loop. */
start_event_loop ();
}
void
cli_command_loop (void *data)
{
display_gdb_prompt (0);
/* Now it's time to start the event loop. */
start_event_loop ();
}
/* General function to handle events in the inferior. So far it just
takes care of detecting errors reported by select() or poll(),
otherwise it assumes that all is OK, and goes on reading data from
the fd. This however may not always be what we want to do. */
void
inferior_event_handler (enum inferior_event_type event_type,
gdb_client_data client_data)
{
switch (event_type)
{
case INF_ERROR:
printf_unfiltered ("error detected from target.\n");
target_async (NULL, 0);
pop_target ();
discard_all_continuations ();
do_exec_error_cleanups (ALL_CLEANUPS);
break;
case INF_REG_EVENT:
/* Use catch errors for now, until the inner layers of
fetch_inferior_event (i.e. readchar) can return meaningful
error status. If an error occurs while getting an event from
the target, just get rid of the target. */
if (!catch_errors (fetch_inferior_event_wrapper,
client_data, "", RETURN_MASK_ALL))
{
target_async (NULL, 0);
pop_target ();
discard_all_continuations ();
do_exec_error_cleanups (ALL_CLEANUPS);
display_gdb_prompt (0);
}
break;
case INF_EXEC_COMPLETE:
/* Is there anything left to do for the command issued to
complete? */
do_all_continuations ();
/* Reset things after target has stopped for the async commands. */
complete_execution ();
break;
case INF_EXEC_CONTINUE:
/* Is there anything left to do for the command issued to
complete? */
do_all_intermediate_continuations ();
break;
case INF_QUIT_REQ:
/* FIXME: ezannoni 1999-10-04. This call should really be a
target vector entry, so that it can be used for any kind of
targets. */
async_remote_interrupt_twice (NULL);
break;
case INF_TIMER:
default:
printf_unfiltered ("Event type not recognized.\n");
break;
}
}
void
start_event_loop (void)
{
/* Loop until there is nothing to do. This is the entry point to the
event loop engine. gdb_do_one_event, called via catch_errors()
will process one event for each invocation. It blocks waits for
an event and then processes it. >0 when an event is processed, 0
when catch_errors() caught an error and <0 when there are no
longer any event sources registered. */
while (1)
{
int gdb_result;
gdb_result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
if (gdb_result < 0)
break;
/* 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. */
if (gdb_result == 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. */
async_enable_stdin ();
/* FIXME: this should really be a call to a hook that is
interface specific, because interfaces can display the
prompt in their own way. */
display_gdb_prompt (0);
/* 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. */
}
}
/* We are done with the event loop. There are no more event sources
to listen to. So we exit GDB. */
return;
}
void
start_event_loop (void)
{
/* Loop until there is nothing to do. This is the entry point to the
event loop engine. gdb_do_one_event, called via catch_errors()
will process one event for each invocation. It blocks waits for
an event and then processes it. >0 when an event is processed, 0
when catch_errors() caught an error and <0 when there are no
longer any event sources registered. */
while (1)
{
int gdb_result;
uiout = interp_ui_out (current_interp ());
gdb_result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
if (gdb_result < 0)
break;
/* 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. */
if (gdb_result == 0)
{
/* APPLE LOCAL whack-a-FIXME */
display_gdb_prompt (0);
/* 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. */
}
}
/* We are done with the event loop. There are no more event sources
to listen to. So we exit GDB. */
return;
}
void
start_event_loop (void)
{
/* Loop until there is nothing to do. This is the entry point to the
event loop engine. gdb_do_one_event, called via catch_errors()
will process one event for each invocation. It blocks waits for
an event and then processes it. >0 when an event is processed, 0
when catch_errors() caught an error and <0 when there are no
longer any event sources registered. */
while (1)
{
int gdb_result, interp_result;
gdb_result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
if (gdb_result < 0)
break;
#if 0
interp_result = catch_errors (interpreter_do_one_event, 0, "", RETURN_MASK_ALL);
if (interp_result < 0)
{
/* FIXME - kill the interpreter */
}
#endif
printf ("FAIL\n");
/* If we long-jumped out of the do_one_event, we probably
didn't get around to resetting the prompt, which leaves
readline in a messed-up state. Reset it here. */
if (gdb_result == 0)
{
display_gdb_prompt (0);
/* Maybe better to set a flag to be checked somewhere as to
whether display the prompt or not. */
}
}
/* We are done with the event loop. There are no more event sources
to listen to. So we exit GDB. */
return;
}
static void
complete_execution (void)
{
target_executing = 0;
/* Unregister the inferior from the event loop. This is done so that
when the inferior is not running we don't get distracted by
spurious inferior output. */
target_async (NULL, 0);
if (sync_execution)
{
do_exec_error_cleanups (ALL_CLEANUPS);
display_gdb_prompt (0);
}
else
{
if (exec_done_display_p)
printf_unfiltered ("completed.\n");
}
}
/* NOTE: 1999-04-30 This is the asynchronous version of the
command_line_input function; command_line_input will become
obsolete once we use the event loop as the default mechanism in
GDB. */
static void
command_line_handler (char *rl)
{
static char *linebuffer = 0;
static unsigned linelength = 0;
char *p;
char *p1;
char *nline;
int repeat = (instream == stdin);
if (annotation_level > 1 && instream == stdin)
{
printf_unfiltered (("\n\032\032post-"));
puts_unfiltered (async_annotation_suffix);
printf_unfiltered (("\n"));
}
if (linebuffer == 0)
{
linelength = 80;
linebuffer = (char *) xmalloc (linelength);
}
p = linebuffer;
if (more_to_come)
{
strcpy (linebuffer, readline_input_state.linebuffer);
p = readline_input_state.linebuffer_ptr;
xfree (readline_input_state.linebuffer);
more_to_come = 0;
}
#ifdef STOP_SIGNAL
if (job_control)
signal (STOP_SIGNAL, handle_stop_sig);
#endif
/* Make sure that all output has been output. Some machines may let
you get away with leaving out some of the gdb_flush, but not
all. */
wrap_here ("");
gdb_flush (gdb_stdout);
gdb_flush (gdb_stderr);
if (source_file_name != NULL)
++source_line_number;
/* If we are in this case, then command_handler will call quit
and exit from gdb. */
if (!rl || rl == (char *) EOF)
{
command_handler (0);
return; /* Lint. */
}
if (strlen (rl) + 1 + (p - linebuffer) > linelength)
{
linelength = strlen (rl) + 1 + (p - linebuffer);
nline = (char *) xrealloc (linebuffer, linelength);
p += nline - linebuffer;
linebuffer = nline;
}
p1 = rl;
/* Copy line. Don't copy null at end. (Leaves line alone
if this was just a newline). */
while (*p1)
*p++ = *p1++;
xfree (rl); /* Allocated in readline. */
if (p > linebuffer && *(p - 1) == '\\')
{
*p = '\0';
p--; /* Put on top of '\'. */
readline_input_state.linebuffer = xstrdup (linebuffer);
readline_input_state.linebuffer_ptr = 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. */
more_to_come = 1;
display_gdb_prompt ("");
return;
}
#ifdef STOP_SIGNAL
if (job_control)
signal (STOP_SIGNAL, SIG_DFL);
#endif
#define SERVER_COMMAND_LENGTH 7
server_command =
(p - linebuffer > SERVER_COMMAND_LENGTH)
&& strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0;
if (server_command)
{
/* Note that we don't set `line'. Between this and the check in
dont_repeat, this insures that repeating will still do the
right thing. */
*p = '\0';
command_handler (linebuffer + SERVER_COMMAND_LENGTH);
display_gdb_prompt (0);
return;
}
/* Do history expansion if that is wished. */
if (history_expansion_p && instream == stdin
&& ISATTY (instream))
{
char *history_value;
int expanded;
*p = '\0'; /* Insert null now. */
expanded = history_expand (linebuffer, &history_value);
if (expanded)
{
/* Print the changes. */
printf_unfiltered ("%s\n", history_value);
/* If there was an error, call this function again. */
if (expanded < 0)
{
xfree (history_value);
return;
}
if (strlen (history_value) > linelength)
{
linelength = strlen (history_value) + 1;
linebuffer = (char *) xrealloc (linebuffer, linelength);
}
strcpy (linebuffer, history_value);
p = linebuffer + strlen (linebuffer);
}
xfree (history_value);
}
/* If we just got an empty line, and that is supposed to repeat the
previous command, return the value in the global buffer. */
if (repeat && p == linebuffer && *p != '\\')
{
command_handler (saved_command_line);
display_gdb_prompt (0);
return;
}
for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++);
if (repeat && !*p1)
{
command_handler (saved_command_line);
display_gdb_prompt (0);
return;
}
*p = 0;
/* Add line to history if appropriate. */
if (instream == stdin
&& ISATTY (stdin) && *linebuffer)
add_history (linebuffer);
/* Note: lines consisting solely of comments are added to the command
history. This is useful when you type a command, and then
realize you don't want to execute it quite yet. You can comment
out the command and then later fetch it from the value history
and remove the '#'. The kill ring is probably better, but some
people are in the habit of commenting things out. */
if (*p1 == '#')
*p1 = '\0'; /* Found a comment. */
/* 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_size = linelength;
}
strcpy (saved_command_line, linebuffer);
if (!more_to_come)
{
command_handler (saved_command_line);
display_gdb_prompt (0);
}
return;
}
command_handler (linebuffer);
display_gdb_prompt (0);
return;
}
/* General function to handle events in the inferior. So far it just
takes care of detecting errors reported by select() or poll(),
otherwise it assumes that all is OK, and goes on reading data from
the fd. This however may not always be what we want to do. */
void
inferior_event_handler (enum inferior_event_type event_type,
gdb_client_data client_data)
{
struct cleanup *cleanup_if_error = make_bpstat_clear_actions_cleanup ();
switch (event_type)
{
case INF_REG_EVENT:
/* Use catch errors for now, until the inner layers of
fetch_inferior_event (i.e. readchar) can return meaningful
error status. If an error occurs while getting an event from
the target, just cancel the current command. */
if (!catch_errors (fetch_inferior_event_wrapper,
client_data, "", RETURN_MASK_ALL))
{
bpstat_clear_actions ();
do_all_intermediate_continuations (1);
do_all_continuations (1);
async_enable_stdin ();
display_gdb_prompt (0);
}
break;
case INF_EXEC_COMPLETE:
if (!non_stop)
{
/* Unregister the inferior from the event loop. This is done
so that when the inferior is not running we don't get
distracted by spurious inferior output. */
if (target_has_execution)
target_async (NULL, 0);
}
/* Do all continuations associated with the whole inferior (not
a particular thread). */
if (!ptid_equal (inferior_ptid, null_ptid))
do_all_inferior_continuations (0);
/* If we were doing a multi-step (eg: step n, next n), but it
got interrupted by a breakpoint, still do the pending
continuations. The continuation itself is responsible for
distinguishing the cases. The continuations are allowed to
touch the inferior memory, e.g. to remove breakpoints, so run
them before running breakpoint commands, which may resume the
target. */
if (non_stop
&& target_has_execution
&& !ptid_equal (inferior_ptid, null_ptid))
do_all_intermediate_continuations_thread (inferior_thread (), 0);
else
do_all_intermediate_continuations (0);
/* Always finish the previous command before running any
breakpoint commands. Any stop cancels the previous command.
E.g. a "finish" or "step-n" command interrupted by an
unrelated breakpoint is canceled. */
if (non_stop
&& target_has_execution
&& !ptid_equal (inferior_ptid, null_ptid))
do_all_continuations_thread (inferior_thread (), 0);
else
do_all_continuations (0);
/* When running a command list (from a user command, say), these
are only run when the command list is all done. */
if (interpreter_async)
{
volatile struct gdb_exception e;
check_frame_language_change ();
/* Don't propagate breakpoint commands errors. Either we're
stopping or some command resumes the inferior. The user will
be informed. */
TRY_CATCH (e, RETURN_MASK_ALL)
{
bpstat_do_actions ();
}
exception_print (gdb_stderr, e);
}
break;
case INF_EXEC_CONTINUE:
/* Is there anything left to do for the command issued to
complete? */
if (non_stop)
do_all_intermediate_continuations_thread (inferior_thread (), 0);
else
do_all_intermediate_continuations (0);
break;
case INF_TIMER:
default:
printf_unfiltered (_("Event type not recognized.\n"));
break;
}
discard_cleanups (cleanup_if_error);
}
/* General function to handle events in the inferior. So far it just
takes care of detecting errors reported by select() or poll(),
otherwise it assumes that all is OK, and goes on reading data from
the fd. This however may not always be what we want to do. */
void
inferior_event_handler (enum inferior_event_type event_type,
gdb_client_data client_data)
{
struct gdb_exception e;
int was_sync = 0;
switch (event_type)
{
case INF_ERROR:
printf_unfiltered (_("error detected from target.\n"));
pop_all_targets_above (file_stratum, 0);
discard_all_intermediate_continuations ();
discard_all_continuations ();
async_enable_stdin ();
break;
case INF_REG_EVENT:
/* Use catch errors for now, until the inner layers of
fetch_inferior_event (i.e. readchar) can return meaningful
error status. If an error occurs while getting an event from
the target, just get rid of the target. */
if (!catch_errors (fetch_inferior_event_wrapper,
client_data, "", RETURN_MASK_ALL))
{
pop_all_targets_above (file_stratum, 0);
discard_all_intermediate_continuations ();
discard_all_continuations ();
async_enable_stdin ();
display_gdb_prompt (0);
}
break;
case INF_EXEC_COMPLETE:
if (!non_stop)
{
/* Unregister the inferior from the event loop. This is done
so that when the inferior is not running we don't get
distracted by spurious inferior output. */
if (target_has_execution)
target_async (NULL, 0);
}
/* The call to async_enable_stdin below resets 'sync_execution'.
However, if sync_execution is 1 now, we also need to show the
prompt below, so save the current value. */
was_sync = sync_execution;
async_enable_stdin ();
/* Do all continuations associated with the whole inferior (not
a particular thread). */
if (!ptid_equal (inferior_ptid, null_ptid))
do_all_inferior_continuations ();
/* If we were doing a multi-step (eg: step n, next n), but it
got interrupted by a breakpoint, still do the pending
continuations. The continuation itself is responsible for
distinguishing the cases. The continuations are allowed to
touch the inferior memory, e.g. to remove breakpoints, so run
them before running breakpoint commands, which may resume the
target. */
if (non_stop
&& target_has_execution
&& !ptid_equal (inferior_ptid, null_ptid))
do_all_intermediate_continuations_thread (inferior_thread ());
else
do_all_intermediate_continuations ();
/* Always finish the previous command before running any
breakpoint commands. Any stop cancels the previous command.
E.g. a "finish" or "step-n" command interrupted by an
unrelated breakpoint is canceled. */
if (non_stop
&& target_has_execution
&& !ptid_equal (inferior_ptid, null_ptid))
do_all_continuations_thread (inferior_thread ());
else
do_all_continuations ();
if (current_language != expected_language
&& language_mode == language_mode_auto)
language_info (1); /* Print what changed. */
/* Don't propagate breakpoint commands errors. Either we're
stopping or some command resumes the inferior. The user will
be informed. */
TRY_CATCH (e, RETURN_MASK_ALL)
{
bpstat_do_actions ();
}
if (!was_sync
&& exec_done_display_p
&& (ptid_equal (inferior_ptid, null_ptid)
|| !is_running (inferior_ptid)))
printf_unfiltered (_("completed.\n"));
break;
case INF_EXEC_CONTINUE:
/* Is there anything left to do for the command issued to
complete? */
if (non_stop)
do_all_intermediate_continuations_thread (inferior_thread ());
else
do_all_intermediate_continuations ();
break;
case INF_QUIT_REQ:
/* FIXME: ezannoni 1999-10-04. This call should really be a
target vector entry, so that it can be used for any kind of
targets. */
async_remote_interrupt_twice (NULL);
break;
case INF_TIMER:
default:
printf_unfiltered (_("Event type not recognized.\n"));
break;
}
}
static void
tui_on_command_error (void)
{
if (!interp_quiet_p (tui_interp))
display_gdb_prompt (NULL);
}
static void
tui_on_sync_execution_done (void)
{
if (!interp_quiet_p (tui_interp))
display_gdb_prompt (NULL);
}
static void
tui_command_loop (void *data)
{
/* If we are using readline, set things up and display the first
prompt, otherwise just print the prompt. */
if (async_command_editing_p)
{
int length;
char *a_prompt;
char *gdb_prompt = get_prompt ();
/* 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. */
length = strlen (PREFIX (0))
+ strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
a_prompt = (char *) alloca (length);
strcpy (a_prompt, PREFIX (0));
strcat (a_prompt, gdb_prompt);
strcat (a_prompt, SUFFIX (0));
rl_callback_handler_install (a_prompt, input_handler);
}
else
display_gdb_prompt (0);
/* Loop until there is nothing to do. This is the entry point to the
event loop engine. gdb_do_one_event, called via catch_errors()
will process one event for each invocation. It blocks waits for
an event and then processes it. >0 when an event is processed, 0
when catch_errors() caught an error and <0 when there are no
longer any event sources registered. */
while (1)
{
int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
if (result < 0)
break;
/* Update gdb output according to TUI mode. Since catch_errors
preserves the uiout from changing, this must be done at top
level of event loop. */
if (tui_active)
uiout = tui_out;
else
uiout = tui_old_uiout;
if (result == 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. */
async_enable_stdin ();
/* FIXME: this should really be a call to a hook that is
interface specific, because interfaces can display the
prompt in their own way. */
display_gdb_prompt (0);
/* 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. */
}
}
/* We are done with the event loop. There are no more event sources
to listen to. So we exit GDB. */
return;
}
