lldb.embedded_interpreter

Package lldb :: Module embedded_interpreter |
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# Source Code for Module lldb.embedded_interpreter

    ï»¿import sys
    if sys.version_info[0] < 3:
        import __builtin__ as builtins
    else:
        import builtins
    import code
    import lldb
    import traceback

    try:
        import readline
        import rlcompleter
    except ImportError:
        have_readline = False
    except AttributeError:
        # This exception gets hit by the rlcompleter when Linux is using
        # the readline suppression import.
        have_readline = False
    else:
        have_readline = True
        if 'libedit' in readline.__doc__:
            readline.parse_and_bind('bind ^I rl_complete')
        else:
            readline.parse_and_bind('tab: complete')

    g_builtin_override_called = False

    class LLDBQuitter(object):

        def __init__(self, name):
            self.name = name

        def __repr__(self):
            self()

        def __call__(self, code=None):
            global g_builtin_override_called
            g_builtin_override_called = True
            raise SystemExit(-1)

    def setquit():
        '''Redefine builtin functions 'quit()' and 'exit()' to print a message and raise an EOFError exception.'''
        # This function will be called prior to each interactive
        # interpreter loop or each single line, so we set the global
        # g_builtin_override_called to False so we know if a SystemExit
        # is thrown, we can catch it and tell the difference between
        # a call to "quit()" or "exit()" and something like
        # "sys.exit(123)"
        global g_builtin_override_called
        g_builtin_override_called = False
        builtins.quit = LLDBQuitter('quit')
        builtins.exit = LLDBQuitter('exit')

    # When running one line, we might place the string to run in this string
    # in case it would be hard to correctly escape a string's contents

    g_run_one_line_str = None

    def get_terminal_size(fd):
        try:
            import fcntl
            import termios
            import struct
            hw = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
        except:
            hw = (0, 0)
        return hw

    def readfunc_stdio(prompt):
        sys.stdout.write(prompt)
        return sys.stdin.readline().rstrip()

    def run_python_interpreter(local_dict):
        # Pass in the dictionary, for continuity from one session to the next.
        setquit()
        try:
            fd = sys.stdin.fileno()
            interacted = False
            if get_terminal_size(fd)[1] == 0:
                try:
                    import termios
                    old = termios.tcgetattr(fd)
                    if old[3] & termios.ECHO:
                        # Need to turn off echoing and restore
                        new = termios.tcgetattr(fd)
                        new[3] = new[3] & ~termios.ECHO
                        try:
                            termios.tcsetattr(fd, termios.TCSADRAIN, new)
                            interacted = True
                            code.interact(
                                banner="Python Interactive Interpreter. To exit, type 'quit()', 'exit()'.",
                                readfunc=readfunc_stdio,
                                local=local_dict)
                        finally:
                            termios.tcsetattr(fd, termios.TCSADRAIN, old)
                except:
                    pass
                # Don't need to turn off echoing
                if not interacted:
                    code.interact(
                        banner="Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.",
                        readfunc=readfunc_stdio,
                        local=local_dict)
            else:
                # We have a real interactive terminal
                code.interact(
                    banner="Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.",
                    local=local_dict)
        except SystemExit as e:
            global g_builtin_override_called
            if not g_builtin_override_called:
                print('Script exited with %s' % (e))

    def run_one_line(local_dict, input_string):
        global g_run_one_line_str
        setquit()
        try:
            repl = code.InteractiveConsole(local_dict)
            if input_string:
                repl.runsource(input_string)
            elif g_run_one_line_str:
                repl.runsource(g_run_one_line_str)

        except SystemExit as e:
            global g_builtin_override_called
            if not g_builtin_override_called:
                print('Script exited with %s' % (e))