def __init__(self, gdb="gdb", gdb_args=None, env=None):
"""Initialize a new machine interface session with GDB."""
gdb_args = gdb_args or []
env = env or {}
env.update(os.environ)
args = [gdb, '--quiet', '--nx', '--nw', '--interpreter=mi2'] + gdb_args
self.process = subprocess.Popen(
args=args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
close_fds=True,
env=env
)
flags = fcntl.fcntl(self.process.stdout, fcntl.F_GETFL)
fcntl.fcntl(self.process.stdout, fcntl.F_SETFL, flags | os.O_NONBLOCK)
self.buffer = "" # Buffer for output from GDB.
self.parser = GDBMIParser() # Parser for output from GDB.
