Breakout `wait_for_parent_stdin_hijack()`, increase root pdb checker poll time
Tyler Goodlet
parent
f3a6ab62af
commit
d30ce96740
|
|
@ -272,12 +272,72 @@ async def _hijack_stdin_for_child(
|
|||
if isinstance(err, trio.Cancelled):
|
||||
raise
|
||||
finally:
|
||||
log.debug("TTY lock released, remote task:"
|
||||
log.debug(
|
||||
"TTY lock released, remote task:"
|
||||
f"{task_name}:{subactor_uid}")
|
||||
|
||||
return "pdb_unlock_complete"
|
||||
|
||||
|
||||
async def wait_for_parent_stdin_hijack(
|
||||
actor: 'Actor', # noqa
|
||||
task_status: TaskStatus[trio.CancelScope] = trio.TASK_STATUS_IGNORED
|
||||
):
|
||||
'''
|
||||
Connect to the root actor via a ctx and invoke a task which locks a root-local
|
||||
TTY lock.
|
||||
|
||||
This function is used by any sub-actor to acquire mutex access to
|
||||
pdb and the root's TTY for interactive debugging (see below inside
|
||||
``_breakpoint()``). It can be used to ensure that an intermediate
|
||||
nursery-owning actor does not clobber its children if they are in
|
||||
debug (see below inside ``maybe_wait_for_debugger()``).
|
||||
|
||||
'''
|
||||
global _debugger_request_cs
|
||||
|
||||
with trio.CancelScope(shield=True) as cs:
|
||||
_debugger_request_cs = cs
|
||||
|
||||
try:
|
||||
async with get_root() as portal:
|
||||
|
||||
# this syncs to child's ``Context.started()`` call.
|
||||
async with portal.open_context(
|
||||
|
||||
tractor._debug._hijack_stdin_for_child,
|
||||
subactor_uid=actor.uid,
|
||||
|
||||
) as (ctx, val):
|
||||
|
||||
log.pdb('locked context')
|
||||
assert val == 'Locked'
|
||||
|
||||
async with ctx.open_stream() as stream:
|
||||
# unblock local caller
|
||||
task_status.started(cs)
|
||||
|
||||
try:
|
||||
await _local_pdb_complete.wait()
|
||||
|
||||
finally:
|
||||
# TODO: shielding currently can cause hangs...
|
||||
with trio.CancelScope(shield=True):
|
||||
await stream.send('pdb_unlock')
|
||||
|
||||
# sync with callee termination
|
||||
assert await ctx.result() == "pdb_unlock_complete"
|
||||
|
||||
except tractor.ContextCancelled:
|
||||
log.warning('Root actor cancelled debug lock')
|
||||
|
||||
finally:
|
||||
log.debug(f"Exiting debugger for actor {actor.uid}")
|
||||
global _local_task_in_debug
|
||||
_local_task_in_debug = None
|
||||
log.debug(f"Child {actor.uid} released parent stdio lock")
|
||||
|
||||
|
||||
async def _breakpoint(
|
||||
|
||||
debug_func,
|
||||
|
|
@ -304,54 +364,6 @@ async def _breakpoint(
|
|||
|
||||
await trio.lowlevel.checkpoint()
|
||||
|
||||
async def wait_for_parent_stdin_hijack(
|
||||
task_status=trio.TASK_STATUS_IGNORED
|
||||
):
|
||||
global _debugger_request_cs
|
||||
|
||||
with trio.CancelScope(shield=True) as cs:
|
||||
_debugger_request_cs = cs
|
||||
|
||||
try:
|
||||
async with get_root() as portal:
|
||||
|
||||
# this syncs to child's ``Context.started()`` call.
|
||||
async with portal.open_context(
|
||||
|
||||
tractor._debug._hijack_stdin_for_child,
|
||||
subactor_uid=actor.uid,
|
||||
|
||||
) as (ctx, val):
|
||||
|
||||
log.pdb('locked context')
|
||||
assert val == 'Locked'
|
||||
|
||||
async with ctx.open_stream() as stream:
|
||||
|
||||
log.error('opened stream')
|
||||
# unblock local caller
|
||||
task_status.started()
|
||||
|
||||
try:
|
||||
await _local_pdb_complete.wait()
|
||||
|
||||
finally:
|
||||
# TODO: shielding currently can cause hangs...
|
||||
with trio.CancelScope(shield=True):
|
||||
await stream.send('pdb_unlock')
|
||||
|
||||
# sync with callee termination
|
||||
assert await ctx.result() == "pdb_unlock_complete"
|
||||
|
||||
except tractor.ContextCancelled:
|
||||
log.warning('Root actor cancelled debug lock')
|
||||
|
||||
finally:
|
||||
log.debug(f"Exiting debugger for actor {actor}")
|
||||
global _local_task_in_debug
|
||||
_local_task_in_debug = None
|
||||
log.debug(f"Child {actor} released parent stdio lock")
|
||||
|
||||
if not _local_pdb_complete or _local_pdb_complete.is_set():
|
||||
_local_pdb_complete = trio.Event()
|
||||
|
||||
|
|
@ -388,7 +400,10 @@ async def _breakpoint(
|
|||
# cancel on this task start? I *think* this works below?
|
||||
# actor._service_n.cancel_scope.shield = shield
|
||||
with trio.CancelScope(shield=True):
|
||||
await actor._service_n.start(wait_for_parent_stdin_hijack)
|
||||
await actor._service_n.start(
|
||||
wait_for_parent_stdin_hijack,
|
||||
actor,
|
||||
)
|
||||
|
||||
elif is_root_process():
|
||||
|
||||
|
|
@ -529,7 +544,7 @@ async def _maybe_enter_pm(err):
|
|||
|
||||
async def maybe_wait_for_debugger() -> None:
|
||||
|
||||
global _no_remote_has_tty, _global_actor_in_debug
|
||||
global _no_remote_has_tty, _global_actor_in_debug, _wait_all_tasks_lock
|
||||
|
||||
# If we error in the root but the debugger is
|
||||
# engaged we don't want to prematurely kill (and
|
||||
|
|
@ -538,7 +553,7 @@ async def maybe_wait_for_debugger() -> None:
|
|||
# Instead try to wait for pdb to be released before
|
||||
# tearing down.
|
||||
if (
|
||||
_state.debug_mode() and
|
||||
_state.debug_mode() or
|
||||
is_root_process()
|
||||
):
|
||||
|
||||
|
|
@ -549,21 +564,23 @@ async def maybe_wait_for_debugger() -> None:
|
|||
# await trio.testing.wait_all_tasks_blocked()
|
||||
|
||||
sub_in_debug = None
|
||||
|
||||
for _ in range(2):
|
||||
|
||||
if _global_actor_in_debug:
|
||||
sub_in_debug = tuple(_global_actor_in_debug)
|
||||
|
||||
for _ in range(2):
|
||||
with trio.CancelScope(shield=True):
|
||||
|
||||
log.warning(
|
||||
'Root polling for debug')
|
||||
await trio.sleep(0.01)
|
||||
|
||||
# TODO: could this make things more deterministic?
|
||||
# wait to see if a sub-actor task will be
|
||||
# scheduled and grab the tty lock on the next
|
||||
# tick?
|
||||
# await trio.testing.wait_all_tasks_blocked()
|
||||
with trio.CancelScope(shield=True):
|
||||
await trio.sleep(0.1)
|
||||
|
||||
# TODO: could this make things more deterministic? wait
|
||||
# to see if a sub-actor task will be scheduled and grab
|
||||
# the tty lock on the next tick?
|
||||
# XXX: doesn't seem to work
|
||||
# await trio.testing.wait_all_tasks_blocked(cushion=0)
|
||||
|
||||
debug_complete = _no_remote_has_tty
|
||||
if (
|
||||
|
|
@ -577,10 +594,10 @@ async def maybe_wait_for_debugger() -> None:
|
|||
|
||||
await debug_complete.wait()
|
||||
|
||||
await trio.sleep(0.01)
|
||||
await trio.sleep(0.1)
|
||||
continue
|
||||
else:
|
||||
log.warning(
|
||||
'Root acquired DEBUGGER'
|
||||
'Root acquired TTY LOCK'
|
||||
)
|
||||
return
|
||||
|
|
|
|||
Loading…
Reference in New Issue