920 lines
26 KiB
Python
920 lines
26 KiB
Python
'''
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The hipster way to force SC onto the stdlib's "async": 'infection mode'.
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'''
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import asyncio
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import builtins
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from contextlib import ExitStack
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import itertools
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import importlib
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import os
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from pathlib import Path
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import signal
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from typing import (
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Callable,
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Iterable,
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Union,
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)
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import pytest
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import trio
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import tractor
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from tractor import (
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current_actor,
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Actor,
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to_asyncio,
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RemoteActorError,
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ContextCancelled,
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_state,
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)
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from tractor.trionics import BroadcastReceiver
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from tractor._testing import expect_ctxc
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async def sleep_and_err(
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sleep_for: float = 0.1,
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# just signature placeholders for compat with
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# ``to_asyncio.open_channel_from()``
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to_trio: trio.MemorySendChannel|None = None,
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from_trio: asyncio.Queue|None = None,
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):
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if to_trio:
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to_trio.send_nowait('start')
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await asyncio.sleep(sleep_for)
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assert 0
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async def aio_sleep_forever():
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await asyncio.sleep(float('inf'))
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async def trio_cancels_single_aio_task():
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# spawn an ``asyncio`` task to run a func and return result
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with trio.move_on_after(.2):
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await tractor.to_asyncio.run_task(aio_sleep_forever)
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def test_trio_cancels_aio_on_actor_side(reg_addr):
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'''
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Spawn an infected actor that is cancelled by the ``trio`` side
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task using std cancel scope apis.
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'''
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async def main():
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async with tractor.open_nursery(
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registry_addrs=[reg_addr]
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) as n:
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await n.run_in_actor(
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trio_cancels_single_aio_task,
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infect_asyncio=True,
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)
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trio.run(main)
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async def asyncio_actor(
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target: str,
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expect_err: Exception|None = None
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) -> None:
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# ensure internal runtime state is consistent
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actor: Actor = tractor.current_actor()
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assert (
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actor.is_infected_aio()
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and
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actor._infected_aio
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and
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_state._runtime_vars['_is_infected_aio']
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)
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target: Callable = globals()[target]
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if '.' in expect_err:
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modpath, _, name = expect_err.rpartition('.')
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mod = importlib.import_module(modpath)
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error_type = getattr(mod, name)
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else: # toplevel builtin error type
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error_type = builtins.__dict__.get(expect_err)
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try:
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# spawn an ``asyncio`` task to run a func and return result
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await tractor.to_asyncio.run_task(target)
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except BaseException as err:
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if expect_err:
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assert isinstance(err, error_type)
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raise
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def test_aio_simple_error(reg_addr):
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'''
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Verify a simple remote asyncio error propagates back through trio
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to the parent actor.
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'''
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async def main():
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async with tractor.open_nursery(
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registry_addrs=[reg_addr]
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) as n:
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await n.run_in_actor(
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asyncio_actor,
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target='sleep_and_err',
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expect_err='AssertionError',
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infect_asyncio=True,
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)
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with pytest.raises(
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expected_exception=(RemoteActorError, ExceptionGroup),
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) as excinfo:
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trio.run(main)
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err = excinfo.value
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# might get multiple `trio.Cancelled`s as well inside an inception
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if isinstance(err, ExceptionGroup):
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err = next(itertools.dropwhile(
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lambda exc: not isinstance(exc, tractor.RemoteActorError),
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err.exceptions
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))
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assert err
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assert isinstance(err, RemoteActorError)
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assert err.boxed_type is AssertionError
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def test_tractor_cancels_aio(reg_addr):
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'''
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Verify we can cancel a spawned asyncio task gracefully.
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'''
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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asyncio_actor,
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target='aio_sleep_forever',
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expect_err='trio.Cancelled',
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infect_asyncio=True,
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)
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# cancel the entire remote runtime
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await portal.cancel_actor()
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trio.run(main)
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def test_trio_cancels_aio(reg_addr):
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'''
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Much like the above test with ``tractor.Portal.cancel_actor()``
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except we just use a standard ``trio`` cancellation api.
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'''
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async def main():
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with trio.move_on_after(1):
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# cancel the nursery shortly after boot
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async with tractor.open_nursery() as n:
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await n.run_in_actor(
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asyncio_actor,
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target='aio_sleep_forever',
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expect_err='trio.Cancelled',
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infect_asyncio=True,
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)
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trio.run(main)
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@tractor.context
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async def trio_ctx(
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ctx: tractor.Context,
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):
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await ctx.started('start')
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# this will block until the ``asyncio`` task sends a "first"
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# message.
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with trio.fail_after(2):
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async with (
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trio.open_nursery() as n,
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tractor.to_asyncio.open_channel_from(
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sleep_and_err,
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) as (first, chan),
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):
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assert first == 'start'
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# spawn another asyncio task for the cuck of it.
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n.start_soon(
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tractor.to_asyncio.run_task,
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aio_sleep_forever,
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)
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await trio.sleep_forever()
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@pytest.mark.parametrize(
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'parent_cancels',
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['context', 'actor', False],
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ids='parent_actor_cancels_child={}'.format
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)
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def test_context_spawns_aio_task_that_errors(
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reg_addr,
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parent_cancels: bool,
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):
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'''
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Verify that spawning a task via an intertask channel ctx mngr that
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errors correctly propagates the error back from the `asyncio`-side
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task.
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'''
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async def main():
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with trio.fail_after(2):
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async with tractor.open_nursery() as n:
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p = await n.start_actor(
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'aio_daemon',
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enable_modules=[__name__],
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infect_asyncio=True,
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# debug_mode=True,
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loglevel='cancel',
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)
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async with (
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expect_ctxc(
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yay=parent_cancels == 'actor',
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),
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p.open_context(
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trio_ctx,
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) as (ctx, first),
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):
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assert first == 'start'
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if parent_cancels == 'actor':
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await p.cancel_actor()
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elif parent_cancels == 'context':
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await ctx.cancel()
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else:
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await trio.sleep_forever()
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async with expect_ctxc(
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yay=parent_cancels == 'actor',
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):
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await ctx.result()
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if parent_cancels == 'context':
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# to tear down sub-acor
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await p.cancel_actor()
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return ctx.outcome
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if parent_cancels:
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# bc the parent made the cancel request,
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# the error is not raised locally but instead
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# the context is exited silently
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res = trio.run(main)
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assert isinstance(res, ContextCancelled)
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assert 'root' in res.canceller[0]
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else:
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expect = RemoteActorError
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with pytest.raises(expect) as excinfo:
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trio.run(main)
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err = excinfo.value
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assert isinstance(err, expect)
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assert err.boxed_type is AssertionError
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async def aio_cancel():
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''''
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Cancel urself boi.
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'''
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await asyncio.sleep(0.5)
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# cancel and enter sleep
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task = asyncio.current_task()
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task.cancel()
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await aio_sleep_forever()
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def test_aio_cancelled_from_aio_causes_trio_cancelled(reg_addr):
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'''
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When the `asyncio.Task` cancels itself the `trio` side cshould
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also cancel and teardown and relay the cancellation cross-process
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to the caller (parent).
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'''
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async def main():
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an: tractor.ActorNursery
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async with tractor.open_nursery() as an:
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p: tractor.Portal = await an.run_in_actor(
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asyncio_actor,
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target='aio_cancel',
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expect_err='tractor.to_asyncio.AsyncioCancelled',
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infect_asyncio=True,
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)
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# NOTE: normally the `an.__aexit__()` waits on the
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# portal's result but we do it explicitly here
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# to avoid indent levels.
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with trio.fail_after(1):
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await p.wait_for_result()
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with pytest.raises(
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expected_exception=(RemoteActorError, ExceptionGroup),
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) as excinfo:
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trio.run(main)
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# might get multiple `trio.Cancelled`s as well inside an inception
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err: RemoteActorError|ExceptionGroup = excinfo.value
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if isinstance(err, ExceptionGroup):
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err = next(itertools.dropwhile(
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lambda exc: not isinstance(exc, tractor.RemoteActorError),
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err.exceptions
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))
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assert err
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# relayed boxed error should be our `trio`-task's
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# cancel-signal-proxy-equivalent of `asyncio.CancelledError`.
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assert err.boxed_type == to_asyncio.AsyncioCancelled
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# TODO: verify open_channel_from will fail on this..
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async def no_to_trio_in_args():
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pass
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async def push_from_aio_task(
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sequence: Iterable,
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to_trio: trio.abc.SendChannel,
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expect_cancel: False,
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fail_early: bool,
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) -> None:
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try:
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# sync caller ctx manager
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to_trio.send_nowait(True)
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for i in sequence:
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print(f'asyncio sending {i}')
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to_trio.send_nowait(i)
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await asyncio.sleep(0.001)
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if i == 50 and fail_early:
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raise Exception
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print('asyncio streamer complete!')
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except asyncio.CancelledError:
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if not expect_cancel:
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pytest.fail("aio task was cancelled unexpectedly")
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raise
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else:
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if expect_cancel:
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pytest.fail("aio task wasn't cancelled as expected!?")
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async def stream_from_aio(
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exit_early: bool = False,
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raise_err: bool = False,
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aio_raise_err: bool = False,
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fan_out: bool = False,
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) -> None:
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seq = range(100)
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expect = list(seq)
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try:
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pulled = []
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async with to_asyncio.open_channel_from(
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push_from_aio_task,
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sequence=seq,
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expect_cancel=raise_err or exit_early,
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fail_early=aio_raise_err,
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) as (first, chan):
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assert first is True
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async def consume(
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chan: Union[
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to_asyncio.LinkedTaskChannel,
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BroadcastReceiver,
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],
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):
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async for value in chan:
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print(f'trio received {value}')
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pulled.append(value)
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if value == 50:
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if raise_err:
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raise Exception
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elif exit_early:
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break
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if fan_out:
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# start second task that get's the same stream value set.
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async with (
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# NOTE: this has to come first to avoid
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# the channel being closed before the nursery
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# tasks are joined..
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chan.subscribe() as br,
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trio.open_nursery() as n,
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):
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n.start_soon(consume, br)
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await consume(chan)
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else:
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await consume(chan)
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finally:
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if (
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not raise_err and
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not exit_early and
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not aio_raise_err
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):
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if fan_out:
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# we get double the pulled values in the
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# ``.subscribe()`` fan out case.
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doubled = list(itertools.chain(*zip(expect, expect)))
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expect = doubled[:len(pulled)]
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assert list(sorted(pulled)) == expect
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else:
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assert pulled == expect
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else:
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assert not fan_out
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assert pulled == expect[:51]
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print('trio guest mode task completed!')
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@pytest.mark.parametrize(
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'fan_out', [False, True],
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ids='fan_out_w_chan_subscribe={}'.format
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)
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def test_basic_interloop_channel_stream(reg_addr, fan_out):
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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stream_from_aio,
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infect_asyncio=True,
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fan_out=fan_out,
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)
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# should raise RAE diectly
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await portal.result()
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trio.run(main)
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# TODO: parametrize the above test and avoid the duplication here?
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def test_trio_error_cancels_intertask_chan(reg_addr):
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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stream_from_aio,
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raise_err=True,
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infect_asyncio=True,
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)
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# should trigger remote actor error
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await portal.result()
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with pytest.raises(RemoteActorError) as excinfo:
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trio.run(main)
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# ensure boxed error type
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excinfo.value.boxed_type is Exception
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def test_trio_closes_early_and_channel_exits(reg_addr):
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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stream_from_aio,
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exit_early=True,
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infect_asyncio=True,
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)
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# should raise RAE diectly
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await portal.result()
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# should be a quiet exit on a simple channel exit
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trio.run(main)
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def test_aio_errors_and_channel_propagates_and_closes(reg_addr):
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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stream_from_aio,
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aio_raise_err=True,
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infect_asyncio=True,
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)
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# should trigger RAE directly, not an eg.
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await portal.result()
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with pytest.raises(
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# NOTE: bc we directly wait on `Portal.result()` instead
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# of capturing it inside the `ActorNursery` machinery.
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expected_exception=RemoteActorError,
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) as excinfo:
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trio.run(main)
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excinfo.value.boxed_type is Exception
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@tractor.context
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async def trio_to_aio_echo_server(
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ctx: tractor.Context,
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):
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async def aio_echo_server(
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to_trio: trio.MemorySendChannel,
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from_trio: asyncio.Queue,
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) -> None:
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to_trio.send_nowait('start')
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while True:
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msg = await from_trio.get()
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# echo the msg back
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to_trio.send_nowait(msg)
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# if we get the terminate sentinel
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# break the echo loop
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if msg is None:
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print('breaking aio echo loop')
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break
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print('exiting asyncio task')
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async with to_asyncio.open_channel_from(
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aio_echo_server,
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) as (first, chan):
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assert first == 'start'
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await ctx.started(first)
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async with ctx.open_stream() as stream:
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async for msg in stream:
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print(f'asyncio echoing {msg}')
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await chan.send(msg)
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out = await chan.receive()
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# echo back to parent actor-task
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await stream.send(out)
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if out is None:
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try:
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out = await chan.receive()
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except trio.EndOfChannel:
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break
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else:
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raise RuntimeError('aio channel never stopped?')
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@pytest.mark.parametrize(
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'raise_error_mid_stream',
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[False, Exception, KeyboardInterrupt],
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ids='raise_error={}'.format,
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)
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|
def test_echoserver_detailed_mechanics(
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reg_addr,
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raise_error_mid_stream,
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):
|
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|
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async def main():
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async with tractor.open_nursery() as n:
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p = await n.start_actor(
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'aio_server',
|
|
enable_modules=[__name__],
|
|
infect_asyncio=True,
|
|
)
|
|
async with p.open_context(
|
|
trio_to_aio_echo_server,
|
|
) as (ctx, first):
|
|
|
|
assert first == 'start'
|
|
|
|
async with ctx.open_stream() as stream:
|
|
for i in range(100):
|
|
await stream.send(i)
|
|
out = await stream.receive()
|
|
assert i == out
|
|
|
|
if raise_error_mid_stream and i == 50:
|
|
raise raise_error_mid_stream
|
|
|
|
# send terminate msg
|
|
await stream.send(None)
|
|
out = await stream.receive()
|
|
assert out is None
|
|
|
|
if out is None:
|
|
# ensure the stream is stopped
|
|
# with trio.fail_after(0.1):
|
|
try:
|
|
await stream.receive()
|
|
except trio.EndOfChannel:
|
|
pass
|
|
else:
|
|
pytest.fail(
|
|
'stream not stopped after sentinel ?!'
|
|
)
|
|
|
|
# TODO: the case where this blocks and
|
|
# is cancelled by kbi or out of task cancellation
|
|
await p.cancel_actor()
|
|
|
|
if raise_error_mid_stream:
|
|
with pytest.raises(raise_error_mid_stream):
|
|
trio.run(main)
|
|
|
|
else:
|
|
trio.run(main)
|
|
|
|
|
|
|
|
@tractor.context
|
|
async def manage_file(
|
|
ctx: tractor.Context,
|
|
tmp_path_str: str,
|
|
send_sigint_to: str,
|
|
trio_side_is_shielded: bool = True,
|
|
bg_aio_task: bool = False,
|
|
):
|
|
'''
|
|
Start an `asyncio` task that just sleeps after registering a context
|
|
with `Actor.lifetime_stack`. Trigger a SIGINT to kill the actor tree
|
|
and ensure the stack is closed in the infected mode child.
|
|
|
|
To verify the teardown state just write a tmpfile to the `testdir`
|
|
and delete it on actor close.
|
|
|
|
'''
|
|
|
|
tmp_path: Path = Path(tmp_path_str)
|
|
tmp_file: Path = tmp_path / f'{" ".join(ctx._actor.uid)}.file'
|
|
|
|
# create a the tmp file and tell the parent where it's at
|
|
assert not tmp_file.is_file()
|
|
tmp_file.touch()
|
|
|
|
stack: ExitStack = current_actor().lifetime_stack
|
|
stack.callback(tmp_file.unlink)
|
|
|
|
await ctx.started((
|
|
str(tmp_file),
|
|
os.getpid(),
|
|
))
|
|
|
|
# expect to be cancelled from here!
|
|
try:
|
|
|
|
# NOTE: turns out you don't even need to sched an aio task
|
|
# since the original issue, even though seemingly was due to
|
|
# the guest-run being abandoned + a `._debug.pause()` inside
|
|
# `._runtime._async_main()` (which was originally trying to
|
|
# debug the `.lifetime_stack` not closing), IS NOT actually
|
|
# the core issue?
|
|
#
|
|
# further notes:
|
|
#
|
|
# - `trio` only issues the " RuntimeWarning: Trio guest run
|
|
# got abandoned without properly finishing... weird stuff
|
|
# might happen" IFF you DO run a asyncio task here, BUT
|
|
# - the original issue of the `.lifetime_stack` not closing
|
|
# will still happen even if you don't run an `asyncio` task
|
|
# here even though the "abandon" messgage won't be shown..
|
|
#
|
|
# => ????? honestly i'm lost but it seems to be some issue
|
|
# with `asyncio` and SIGINT..
|
|
#
|
|
# honestly, this REALLY reminds me why i haven't used
|
|
# `asyncio` by choice in years.. XD
|
|
#
|
|
async with trio.open_nursery() as tn:
|
|
if bg_aio_task:
|
|
tn.start_soon(
|
|
tractor.to_asyncio.run_task,
|
|
aio_sleep_forever,
|
|
)
|
|
|
|
# XXX don't-need/doesn't-make-a-diff right
|
|
# since we're already doing it from parent?
|
|
# if send_sigint_to == 'child':
|
|
# os.kill(
|
|
# os.getpid(),
|
|
# signal.SIGINT,
|
|
# )
|
|
|
|
# XXX spend a half sec doing shielded checkpointing to
|
|
# ensure that despite the `trio`-side task ignoring the
|
|
# SIGINT, the `asyncio` side won't abandon the guest-run!
|
|
if trio_side_is_shielded:
|
|
with trio.CancelScope(shield=True):
|
|
for i in range(5):
|
|
await trio.sleep(0.1)
|
|
|
|
await trio.sleep_forever()
|
|
|
|
# signalled manually at the OS level (aka KBI) by the parent actor.
|
|
except KeyboardInterrupt:
|
|
print('child raised KBI..')
|
|
assert tmp_file.exists()
|
|
raise
|
|
|
|
raise RuntimeError('shoulda received a KBI?')
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
'trio_side_is_shielded',
|
|
[
|
|
False,
|
|
True,
|
|
],
|
|
ids=[
|
|
'trio_side_no_shielding',
|
|
'trio_side_does_shielded_work',
|
|
],
|
|
)
|
|
@pytest.mark.parametrize(
|
|
'send_sigint_to',
|
|
[
|
|
'child',
|
|
'parent',
|
|
],
|
|
ids='send_SIGINT_to={}'.format,
|
|
)
|
|
@pytest.mark.parametrize(
|
|
'bg_aio_task',
|
|
[
|
|
False,
|
|
|
|
# NOTE: (and see notes in `manage_file()` above as well) if
|
|
# we FOR SURE SPAWN AN AIO TASK in the child it seems the
|
|
# "silent-abandon" case (as is described in detail in
|
|
# `to_asyncio.run_as_asyncio_guest()`) does not happen and
|
|
# `asyncio`'s loop will at least abandon the `trio` side
|
|
# loudly? .. prolly the state-spot to start looking for
|
|
# a soln that results in NO ABANDONMENT.. XD
|
|
True,
|
|
],
|
|
ids=[
|
|
'bg_aio_task',
|
|
'just_trio_slee',
|
|
],
|
|
)
|
|
@pytest.mark.parametrize(
|
|
'wait_for_ctx',
|
|
[
|
|
False,
|
|
True,
|
|
],
|
|
ids=[
|
|
'raise_KBI_in_rent',
|
|
'wait_for_ctx',
|
|
],
|
|
)
|
|
def test_sigint_closes_lifetime_stack(
|
|
tmp_path: Path,
|
|
wait_for_ctx: bool,
|
|
bg_aio_task: bool,
|
|
trio_side_is_shielded: bool,
|
|
debug_mode: bool,
|
|
send_sigint_to: str,
|
|
):
|
|
'''
|
|
Ensure that an infected child can use the `Actor.lifetime_stack`
|
|
to make a file on boot and it's automatically cleaned up by the
|
|
actor-lifetime-linked exit stack closure.
|
|
|
|
'''
|
|
async def main():
|
|
try:
|
|
an: tractor.ActorNursery
|
|
async with tractor.open_nursery(
|
|
debug_mode=debug_mode,
|
|
) as an:
|
|
p: tractor.Portal = await an.start_actor(
|
|
'file_mngr',
|
|
enable_modules=[__name__],
|
|
infect_asyncio=True,
|
|
)
|
|
async with p.open_context(
|
|
manage_file,
|
|
tmp_path_str=str(tmp_path),
|
|
send_sigint_to=send_sigint_to,
|
|
bg_aio_task=bg_aio_task,
|
|
trio_side_is_shielded=trio_side_is_shielded,
|
|
) as (ctx, first):
|
|
|
|
path_str, cpid = first
|
|
tmp_file: Path = Path(path_str)
|
|
assert tmp_file.exists()
|
|
|
|
# XXX originally to simulate what (hopefully)
|
|
# the below now triggers.. had to manually
|
|
# trigger a SIGINT from a ctl-c in the root.
|
|
# await trio.sleep_forever()
|
|
|
|
# XXX NOTE XXX signal infected-`asyncio` child to
|
|
# OS-cancel with SIGINT; this should trigger the
|
|
# bad `asyncio` cancel behaviour that can cause
|
|
# a guest-run abandon as was seen causing
|
|
# shm-buffer leaks in `piker`'s live quote stream
|
|
# susbys!
|
|
#
|
|
await trio.sleep(.2)
|
|
pid: int = (
|
|
cpid if send_sigint_to == 'child'
|
|
else os.getpid()
|
|
)
|
|
os.kill(
|
|
pid,
|
|
signal.SIGINT,
|
|
)
|
|
|
|
# XXX CASE 1: without the bug fixed, in
|
|
# the non-KBI-raised-in-parent case, this
|
|
# timeout should trigger!
|
|
if wait_for_ctx:
|
|
print('waiting for ctx outcome in parent..')
|
|
try:
|
|
with trio.fail_after(1):
|
|
await ctx.wait_for_result()
|
|
except tractor.ContextCancelled as ctxc:
|
|
assert ctxc.canceller == ctx.chan.uid
|
|
raise
|
|
|
|
# XXX CASE 2: this seems to be the source of the
|
|
# original issue which exhibited BEFORE we put
|
|
# a `Actor.cancel_soon()` inside
|
|
# `run_as_asyncio_guest()`..
|
|
else:
|
|
raise KeyboardInterrupt
|
|
|
|
pytest.fail('should have raised some kinda error?!?')
|
|
|
|
except (
|
|
KeyboardInterrupt,
|
|
ContextCancelled,
|
|
):
|
|
# XXX CASE 2: without the bug fixed, in the
|
|
# KBI-raised-in-parent case, the actor teardown should
|
|
# never get run (silently abaondoned by `asyncio`..) and
|
|
# thus the file should leak!
|
|
assert not tmp_file.exists()
|
|
assert ctx.maybe_error
|
|
|
|
trio.run(main)
|
|
|
|
|
|
# TODO: debug_mode tests once we get support for `asyncio`!
|
|
#
|
|
# -[ ] need tests to wrap both scripts:
|
|
# - [ ] infected_asyncio_echo_server.py
|
|
# - [ ] debugging/asyncio_bp.py
|
|
# -[ ] consider moving ^ (some of) these ^ to `test_debugger`?
|
|
#
|
|
# -[ ] missing impl outstanding includes:
|
|
# - [x] for sync pauses we need to ensure we open yet another
|
|
# `greenback` portal in the asyncio task
|
|
# => completed using `.bestow_portal(task)` inside
|
|
# `.to_asyncio._run_asyncio_task()` right?
|
|
# -[ ] translation func to get from `asyncio` task calling to
|
|
# `._debug.wait_for_parent_stdin_hijack()` which does root
|
|
# call to do TTY locking.
|
|
#
|
|
def test_sync_breakpoint():
|
|
'''
|
|
Verify we can do sync-func/code breakpointing using the
|
|
`breakpoint()` builtin inside infected mode actors.
|
|
|
|
'''
|
|
pytest.xfail('This support is not implemented yet!')
|
|
|
|
|
|
def test_debug_mode_crash_handling():
|
|
'''
|
|
Verify mult-actor crash handling works with a combo of infected-`asyncio`-mode
|
|
and normal `trio` actors despite nested process trees.
|
|
|
|
'''
|
|
pytest.xfail('This support is not implemented yet!')
|