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10 Commits

Author SHA1 Message Date
Tyler Goodlet 57edf481e8 Always raise asyncio errors 2021-09-08 07:46:55 -04:00
Tyler Goodlet d6ddc47e58 Test non-shielding root lock acquire on breakpoint entry 2021-09-08 07:46:55 -04:00
Tyler Goodlet 86f4f2df6f Drop old implementation cruft 2021-09-08 07:46:55 -04:00
Tyler Goodlet 2bd5ba76b9 Fix error propagation on asyncio streaming tasks 2021-09-08 07:46:55 -04:00
Tyler Goodlet a4859c969c Drop bad .close() call 2021-09-08 07:46:55 -04:00
Tyler Goodlet 2dfa12c743 Proxy asyncio cancelleds as well 2021-09-08 07:46:55 -04:00
Tyler Goodlet f812c344a7 Don't kill root's immediate children when in debug
If the root calls `trio.Process.kill()` on immediate child proc teardown
when the child is using pdb, we can get stdstreams clobbering that
results in a pdb++ repl where the user can't see what's been typed. Not
killing such children on cancellation / error seems to resolve this
issue whilst still giving reliable termination. For now, code that
special path until a time it becomes a problem for ensuring zombie
reaps.
2021-09-08 07:46:55 -04:00
Tyler Goodlet e161f7bac0 WIP redo asyncio async gen streaming 2021-09-08 07:46:55 -04:00
Tyler Goodlet 3fd28ee3a5 Support asyncio actors with the trio spawner backend 2021-09-08 07:46:55 -04:00
Tyler Goodlet 8dba692ef5 Support sync code breakpointing via built-in
Override `breakpoint()` for sync code making it work
properly with `trio` as per:

https://github.com/python-trio/trio/issues/1155#issuecomment-742964018

Relates to #193
2021-09-08 07:46:55 -04:00
4 changed files with 99 additions and 46 deletions

View File

@ -254,6 +254,7 @@ async def _hijack_stdin_for_child(
# assert await stream.receive() == 'pdb_unlock'
except (
trio.MultiError,
trio.BrokenResourceError,
trio.Cancelled, # by local cancellation
trio.ClosedResourceError, # by self._rx_chan
@ -343,6 +344,7 @@ async def _breakpoint(
except tractor.ContextCancelled:
log.warning('Root actor cancelled debug lock')
raise
finally:
log.debug(f"Exiting debugger for actor {actor}")
@ -407,7 +409,11 @@ async def _breakpoint(
'Root actor attempting to shield-acquire active tty lock'
f' owned by {_global_actor_in_debug}')
with trio.CancelScope(shield=True):
stats = _debug_lock.statistics()
if stats.owner:
breakpoint()
# with trio.CancelScope(shield=True):
# must shield here to avoid hitting a ``Cancelled`` and
# a child getting stuck bc we clobbered the tty
await _debug_lock.acquire()

View File

@ -238,7 +238,7 @@ def run(
def run_daemon(
rpc_module_paths: List[str],
enable_modules: List[str],
**kwargs
) -> None:
"""Spawn daemon actor which will respond to RPC.
@ -247,9 +247,9 @@ def run_daemon(
``tractor.run(trio.sleep(float('inf')))`` such that the first actor spawned
is meant to run forever responding to RPC requests.
"""
kwargs['rpc_module_paths'] = list(rpc_module_paths)
kwargs['enable_modules'] = list(enable_modules)
for path in rpc_module_paths:
for path in enable_modules:
importlib.import_module(path)
return run(partial(trio.sleep, float('inf')), **kwargs)

View File

@ -331,6 +331,7 @@ async def new_proc(
bind_addr=bind_addr,
parent_addr=parent_addr,
_runtime_vars=_runtime_vars,
infect_asyncio=infect_asyncio,
task_status=task_status,
)
@ -346,6 +347,7 @@ async def mp_new_proc(
parent_addr: Tuple[str, int],
_runtime_vars: Dict[str, Any], # serialized and sent to _child
*,
infect_asyncio: bool = False,
task_status: TaskStatus[Portal] = trio.TASK_STATUS_IGNORED
) -> None:

View File

@ -1,6 +1,7 @@
"""
'''
Infection apis for ``asyncio`` loops running ``trio`` using guest mode.
"""
'''
import asyncio
import inspect
from typing import (
@ -43,15 +44,16 @@ async def consume_asyncgen(
to_trio.send_nowait(item)
async def run_task(
def _run_asyncio_task(
func: Callable,
*,
qsize: int = 2**10,
qsize: int = 1,
_treat_as_stream: bool = False,
**kwargs,
) -> Any:
"""Run an ``asyncio`` async function or generator in a task, return
or stream the result back to ``trio``.
"""
assert current_actor().is_infected_aio()
@ -59,20 +61,27 @@ async def run_task(
from_trio = asyncio.Queue(qsize) # type: ignore
to_trio, from_aio = trio.open_memory_channel(qsize) # type: ignore
from_aio._err = None
args = tuple(inspect.getfullargspec(func).args)
if getattr(func, '_tractor_steam_function', None):
# the assumption is that the target async routine accepts the
# send channel then it intends to yield more then one return
# value otherwise it would just return ;P
_treat_as_stream = True
# _treat_as_stream = True
assert qsize > 1
# allow target func to accept/stream results manually by name
if 'to_trio' in args:
kwargs['to_trio'] = to_trio
if 'from_trio' in args:
kwargs['from_trio'] = from_trio
# if 'from_aio' in args:
# kwargs['from_aio'] = from_aio
coro = func(**kwargs)
cancel_scope = trio.CancelScope()
@ -80,8 +89,10 @@ async def run_task(
# start the asyncio task we submitted from trio
if inspect.isawaitable(coro):
task = asyncio.create_task(run_coro(to_trio, coro))
elif inspect.isasyncgen(coro):
task = asyncio.create_task(consume_asyncgen(to_trio, coro))
else:
raise TypeError(f"No support for invoking {coro}")
@ -91,59 +102,93 @@ async def run_task(
"""Cancel the calling ``trio`` task on error.
"""
nonlocal aio_err
try:
aio_err = task.exception()
except asyncio.CancelledError as cerr:
aio_err = cerr
if aio_err:
log.exception(f"asyncio task errorred:\n{aio_err}")
cancel_scope.cancel()
from_aio._err = aio_err
from_aio.close()
task.add_done_callback(cancel_trio)
# async iterator
if inspect.isasyncgen(coro) or _treat_as_stream:
return task, from_aio, to_trio, cancel_scope
async def stream_results():
try:
with cancel_scope:
# stream values upward
async with from_aio:
async for item in from_aio:
yield item
if cancel_scope.cancelled_caught:
# always raise from any captured asyncio error
if aio_err:
raise aio_err
async def run_task(
except BaseException as err:
if aio_err is not None:
# always raise from any captured asyncio error
raise err from aio_err
else:
raise
func: Callable,
*,
return stream_results()
qsize: int = 2**10,
_treat_as_stream: bool = False,
**kwargs,
) -> Any:
"""Run an ``asyncio`` async function or generator in a task, return
or stream the result back to ``trio``.
"""
# streaming ``asyncio`` task
if _treat_as_stream:
task, from_aio, to_trio, cs = _run_asyncio_task(
func,
qsize=2**8,
**kwargs,
)
# naively expect the mem chan api to do the job
# of handling cross-framework cancellations / errors
return from_aio
# simple async func
try:
with cancel_scope:
task, from_aio, to_trio, cs = _run_asyncio_task(
func,
qsize=1,
**kwargs,
)
# return single value
with cs:
return await from_aio.receive()
if cancel_scope.cancelled_caught:
# always raise from any captured asyncio error
if aio_err:
raise aio_err
# Do we need this?
except BaseException as err:
if aio_err is not None:
# always raise from any captured asyncio error
raise err from aio_err
else:
except trio.Cancelled:
if not task.done():
task.cancel()
raise
finally:
if from_aio._err:
raise from_aio._err
# TODO: explicit api for the streaming case where
# we pull from the mem chan in an async generator?
# This ends up looking more like our ``Portal.open_stream_from()``
# NB: code below is untested.
# @asynccontextmanager
# async def stream_from_task(
# target: Callable[Any],
# **kwargs,
# ) -> AsyncIterator[Any]:
# from_aoi = await run_task(target, _treat_as_stream=True, **kwargs)
# with cancel_scope:
# # stream values upward
# async with from_aio:
# async for item in from_aio:
# yield item
def run_as_asyncio_guest(
trio_main: Callable,