def fred_setup():
"""Perform any setup needed by FReD before entering an I/O loop."""
global g_debugger, gs_resume_dir_path, GS_FRED_TMPDIR
# Parse command line args and set up environment.
l_cmd = parse_program_args()
# Set up the FReD global debugger
setup_debugger(l_cmd[0])
# Set up I/O handling
# (only spawn if we are not resuming:)
b_resume = gs_resume_dir_path != None
if not b_resume:
cleanup_fred_files()
setup_fredio(l_cmd, True)
g_debugger.create_master_branch()
else:
setup_fredio(l_cmd, False)
dmtcpmanager.resume(GS_FRED_TMPDIR, gs_resume_dir_path)
g_debugger.setup_from_resume()
# XXX: Right now this is a hack to get the virtualized pid of the
# inferior. We should make this more robust. Ideally we could have
# support from DMTCP (via dmtcp_command) to tell us the inferior
# virtualized pid.
fredutil.fred_assert(g_debugger.personality_name() == "gdb")
n_inf_pid = int(g_debugger.evaluate_expression("getpid()"))
fredmanager.set_pid(n_inf_pid)
g_debugger.set_debugger_pid(fredio.get_child_pid())
def dispatch_command(s_command, b_wait=False):
"""Given a user command, dispatches and executes it in the right way.
If b_wait is True, wait for the debugger prompt after each command."""
fredutil.fred_timer_start(s_command)
# TODO: Currently we do not log fred commands. Do we need to?
if is_fred_command(s_command):
handle_fred_command(s_command)
else:
# XXX: Figure out a more elegant way to do this. We can't set the
# inferior pid until we know the inferior is alive, so we keep trying
# to update it with every command issued until it succeeds.
if fredmanager.get_pid() == -1:
n_inf_pid = fredutil.get_inferior_pid(fredio.get_child_pid())
fredmanager.set_pid(n_inf_pid)
fredio.send_command(s_command)
g_debugger.log_command(s_command)
if b_wait:
fredio.wait_for_prompt()
fredutil.fred_timer_stop(s_command)
