void
gdb_rl_callback_handler_reinstall (void)
{
if (!callback_handler_installed)
{
/* Passing NULL as prompt argument tells readline to not display
a prompt. */
gdb_rl_callback_handler_install (NULL);
}
}
void
gdb_rl_callback_handler_reinstall (void)
{
gdb_assert (current_ui == main_ui);
if (!callback_handler_installed)
{
/* Passing NULL as prompt argument tells readline to not display
a prompt. */
gdb_rl_callback_handler_install (NULL);
}
}
void
display_gdb_prompt (const char *new_prompt)
{
std::string actual_gdb_prompt;
annotate_display_prompt ();
/* Reset the nesting depth used when trace-commands is set. */
reset_command_nest_depth ();
/* Do not call the python hook on an explicit prompt change as
passed to this function, as this forms a secondary/local prompt,
IE, displayed but not set. */
if (! new_prompt)
{
struct ui *ui = current_ui;
if (ui->prompt_state == PROMPTED)
internal_error (__FILE__, __LINE__, _("double prompt"));
else if (ui->prompt_state == PROMPT_BLOCKED)
{
/* 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. */
if (current_ui->command_editing)
gdb_rl_callback_handler_remove ();
return;
}
else if (ui->prompt_state == PROMPT_NEEDED)
{
/* Display the top level prompt. */
actual_gdb_prompt = top_level_prompt ();
ui->prompt_state = PROMPTED;
}
}
else
actual_gdb_prompt = new_prompt;
if (current_ui->command_editing)
{
gdb_rl_callback_handler_remove ();
gdb_rl_callback_handler_install (actual_gdb_prompt.c_str ());
}
/* new_prompt at this point can be the top of the stack or the one
passed in. It can't be NULL. */
else
{
/* Don't use a _filtered function here. It causes the assumed
character position to be off, since the newline we read from
the user is not accounted for. */
fputs_unfiltered (actual_gdb_prompt.c_str (), gdb_stdout);
gdb_flush (gdb_stdout);
}
}
void
display_gdb_prompt (const char *new_prompt)
{
char *actual_gdb_prompt = NULL;
struct cleanup *old_chain;
annotate_display_prompt ();
/* Reset the nesting depth used when trace-commands is set. */
reset_command_nest_depth ();
old_chain = make_cleanup (free_current_contents, &actual_gdb_prompt);
/* Do not call the python hook on an explicit prompt change as
passed to this function, as this forms a secondary/local prompt,
IE, displayed but not set. */
if (! new_prompt)
{
if (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. */
gdb_rl_callback_handler_remove ();
do_cleanups (old_chain);
return;
}
else
{
/* Display the top level prompt. */
actual_gdb_prompt = top_level_prompt ();
}
}
else
actual_gdb_prompt = xstrdup (new_prompt);
if (async_command_editing_p)
{
gdb_rl_callback_handler_remove ();
gdb_rl_callback_handler_install (actual_gdb_prompt);
}
/* new_prompt at this point can be the top of the stack or the one
passed in. It can't be NULL. */
else
{
/* Don't use a _filtered function here. It causes the assumed
character position to be off, since the newline we read from
the user is not accounted for. */
fputs_unfiltered (actual_gdb_prompt, gdb_stdout);
gdb_flush (gdb_stdout);
}
do_cleanups (old_chain);
}
