Drop all the `@cm.__exit__()` override attempts..
None of it worked (you still will see `.__exit__()` frames on debugger entry - you'd think this would have been solved by now but, shrug) so instead wrap the debugger entry-point in a `try:` and put the SIGINT handler restoration inside `MultiActorPdb` teardown hooks. This seems to restore the UX as it was prior but with also giving the desired SIGINT override handler behaviour.sigintsaviour_citesthackin
Tyler Goodlet
parent
7964a9f6f8
commit
aea8f63bae
|
|
@ -24,16 +24,12 @@ import sys
|
|||
import signal
|
||||
from functools import partial
|
||||
from contextlib import asynccontextmanager as acm
|
||||
from contextlib import contextmanager as cm
|
||||
from contextlib import _GeneratorContextManager
|
||||
import contextlib
|
||||
from typing import (
|
||||
Tuple,
|
||||
Optional,
|
||||
Callable,
|
||||
AsyncIterator,
|
||||
AsyncGenerator,
|
||||
Iterator,
|
||||
)
|
||||
|
||||
import tractor
|
||||
|
|
@ -58,19 +54,6 @@ except ImportError:
|
|||
log = get_logger(__name__)
|
||||
|
||||
|
||||
class noexittbGCM(_GeneratorContextManager):
|
||||
# @pdb.hideframe
|
||||
def __exit__(self, type, value, traceback):
|
||||
__tracebackhide__ = True
|
||||
# try:
|
||||
return super().__exit__(type, value, traceback)
|
||||
# except:
|
||||
# print('EXITED')
|
||||
|
||||
|
||||
contextlib._GeneratorContextManager = noexittbGCM
|
||||
|
||||
|
||||
__all__ = ['breakpoint', 'post_mortem']
|
||||
|
||||
|
||||
|
|
@ -103,9 +86,11 @@ class TractorConfig(pdbpp.DefaultConfig):
|
|||
enable_hidden_frames = False
|
||||
|
||||
|
||||
class PdbwTeardown(pdbpp.Pdb):
|
||||
"""Add teardown hooks to the regular ``pdbpp.Pdb``.
|
||||
"""
|
||||
class MultiActorPdb(pdbpp.Pdb):
|
||||
'''
|
||||
Add teardown hooks to the regular ``pdbpp.Pdb``.
|
||||
|
||||
'''
|
||||
# override the pdbpp config with our coolio one
|
||||
DefaultConfig = TractorConfig
|
||||
|
||||
|
|
@ -172,7 +157,8 @@ async def _acquire_debug_lock(
|
|||
uid: Tuple[str, str]
|
||||
|
||||
) -> AsyncIterator[trio.StrictFIFOLock]:
|
||||
'''Acquire a root-actor local FIFO lock which tracks mutex access of
|
||||
'''
|
||||
Acquire a root-actor local FIFO lock which tracks mutex access of
|
||||
the process tree's global debugger breakpoint.
|
||||
|
||||
This lock avoids tty clobbering (by preventing multiple processes
|
||||
|
|
@ -269,6 +255,14 @@ async def _hijack_stdin_for_child(
|
|||
|
||||
log.debug(f"Actor {subactor_uid} is WAITING on stdin hijack lock")
|
||||
|
||||
orig_handler = signal.signal(
|
||||
signal.SIGINT,
|
||||
shield_sigint,
|
||||
# partial(shield_sigint, pdb=pdb),
|
||||
)
|
||||
# try:
|
||||
# yield
|
||||
try:
|
||||
with (
|
||||
trio.CancelScope(shield=True),
|
||||
# disable_sigint(),
|
||||
|
|
@ -280,7 +274,9 @@ async def _hijack_stdin_for_child(
|
|||
|
||||
# indicate to child that we've locked stdio
|
||||
await ctx.started('Locked')
|
||||
log.debug(f"Actor {subactor_uid} acquired stdin hijack lock")
|
||||
log.debug(
|
||||
f"Actor {subactor_uid} acquired stdin hijack lock"
|
||||
)
|
||||
|
||||
# wait for unlock pdb by child
|
||||
async with ctx.open_stream() as stream:
|
||||
|
|
@ -316,6 +312,12 @@ async def _hijack_stdin_for_child(
|
|||
|
||||
return "pdb_unlock_complete"
|
||||
|
||||
finally:
|
||||
signal.signal(
|
||||
signal.SIGINT,
|
||||
orig_handler
|
||||
)
|
||||
|
||||
|
||||
async def wait_for_parent_stdin_hijack(
|
||||
actor_uid: Tuple[str, str],
|
||||
|
|
@ -361,12 +363,14 @@ async def wait_for_parent_stdin_hijack(
|
|||
|
||||
finally:
|
||||
# TODO: shielding currently can cause hangs...
|
||||
with trio.CancelScope(shield=True):
|
||||
# with trio.CancelScope(shield=True):
|
||||
await stream.send('pdb_unlock')
|
||||
|
||||
# sync with callee termination
|
||||
assert await ctx.result() == "pdb_unlock_complete"
|
||||
|
||||
log.pdb('unlocked context')
|
||||
|
||||
except tractor.ContextCancelled:
|
||||
log.warning('Root actor cancelled debug lock')
|
||||
|
||||
|
|
@ -398,6 +402,15 @@ async def _breakpoint(
|
|||
# scope here???
|
||||
# with trio.CancelScope(shield=shield):
|
||||
|
||||
pdb = MultiActorPdb()
|
||||
signal.signal = pdbpp.hideframe(signal.signal)
|
||||
orig_handler = signal.signal(
|
||||
signal.SIGINT,
|
||||
partial(shield_sigint, pdb_obj=pdb),
|
||||
)
|
||||
pdb.allow_kbdint = True
|
||||
pdb.nosigint = True
|
||||
|
||||
actor = tractor.current_actor()
|
||||
task_name = trio.lowlevel.current_task().name
|
||||
|
||||
|
|
@ -414,9 +427,12 @@ async def _breakpoint(
|
|||
|
||||
if _local_task_in_debug:
|
||||
if _local_task_in_debug == task_name:
|
||||
print("LOCAL TASK ALREADY IN DEBUG")
|
||||
# this task already has the lock and is
|
||||
# likely recurrently entering a breakpoint
|
||||
return
|
||||
else:
|
||||
print("NOT LOCAL TASK ALREADY IN DEBUG")
|
||||
|
||||
# if **this** actor is already in debug mode block here
|
||||
# waiting for the control to be released - this allows
|
||||
|
|
@ -430,8 +446,18 @@ async def _breakpoint(
|
|||
# entries/requests to the root process
|
||||
_local_task_in_debug = task_name
|
||||
|
||||
def child_release_hook():
|
||||
# _local_task_in_debug = None
|
||||
_local_pdb_complete.set()
|
||||
# restore original sigint handler
|
||||
signal.signal(
|
||||
signal.SIGINT,
|
||||
orig_handler
|
||||
)
|
||||
|
||||
# assign unlock callback for debugger teardown hooks
|
||||
_pdb_release_hook = _local_pdb_complete.set
|
||||
# _pdb_release_hook = _local_pdb_complete.set
|
||||
_pdb_release_hook = child_release_hook
|
||||
|
||||
# this **must** be awaited by the caller and is done using the
|
||||
# root nursery so that the debugger can continue to run without
|
||||
|
|
@ -496,42 +522,49 @@ async def _breakpoint(
|
|||
_local_task_in_debug = None
|
||||
_local_pdb_complete.set()
|
||||
|
||||
# restore original sigint handler
|
||||
signal.signal(
|
||||
signal.SIGINT,
|
||||
orig_handler
|
||||
)
|
||||
|
||||
_pdb_release_hook = teardown
|
||||
|
||||
frame = sys._getframe()
|
||||
last_f = frame.f_back
|
||||
last_f.f_globals['__tracebackhide__'] = True
|
||||
try:
|
||||
# block here one (at the appropriate frame *up*) where
|
||||
# ``breakpoint()`` was awaited and begin handling stdio.
|
||||
log.debug("Entering the synchronous world of pdb")
|
||||
debug_func(actor, pdb)
|
||||
|
||||
debug_func(actor)
|
||||
|
||||
|
||||
@cm
|
||||
@pdb.hideframe
|
||||
def _open_pdb() -> Iterator[PdbwTeardown]:
|
||||
|
||||
# XXX: setting these flags on the pdb instance are absolutely
|
||||
# critical to having ctrl-c work in the ``trio`` standard way! The
|
||||
# stdlib's pdb supports entering the current sync frame on a SIGINT,
|
||||
# with ``trio`` we pretty much never want this and if we did we can
|
||||
# handle it in the ``tractor`` task runtime.
|
||||
__tracebackhide__ = True
|
||||
|
||||
pdb = PdbwTeardown()
|
||||
pdb.allow_kbdint = True
|
||||
pdb.nosigint = True
|
||||
|
||||
try:
|
||||
yield pdb
|
||||
except bdb.BdbQuit:
|
||||
if _pdb_release_hook:
|
||||
_pdb_release_hook()
|
||||
raise
|
||||
|
||||
# XXX: apparently we can't do this without showing this frame
|
||||
# in the backtrace on first entry to the REPL? Seems like an odd
|
||||
# behaviour that should have been fixed by now. This is also why
|
||||
# we scrapped all the @cm approaches that were tried previously.
|
||||
|
||||
# finally:
|
||||
# __tracebackhide__ = True
|
||||
# # frame = sys._getframe()
|
||||
# # last_f = frame.f_back
|
||||
# # last_f.f_globals['__tracebackhide__'] = True
|
||||
# # signal.signal = pdbpp.hideframe(signal.signal)
|
||||
# signal.signal(
|
||||
# signal.SIGINT,
|
||||
# orig_handler
|
||||
# )
|
||||
|
||||
|
||||
def shield_sigint(
|
||||
signum: int,
|
||||
frame: 'frame', # type: ignore # noqa
|
||||
pdb: Optional[PdbwTeardown] = None,
|
||||
pdb_obj: Optional[MultiActorPdb] = None,
|
||||
*args,
|
||||
|
||||
) -> None:
|
||||
|
|
@ -543,6 +576,12 @@ def shield_sigint(
|
|||
is always cancelled on ctrl-c.
|
||||
|
||||
'''
|
||||
__tracebackhide__ = True
|
||||
|
||||
frame = sys._getframe()
|
||||
last_f = frame.f_back
|
||||
last_f.f_globals['__tracebackhide__'] = True
|
||||
|
||||
global _local_task_in_debug, _global_actor_in_debug
|
||||
in_debug = _global_actor_in_debug
|
||||
|
||||
|
|
@ -598,68 +637,33 @@ def shield_sigint(
|
|||
raise KeyboardInterrupt
|
||||
|
||||
# maybe redraw/print last REPL output to console
|
||||
if pdb:
|
||||
if pdb_obj:
|
||||
|
||||
# TODO: make this work like sticky mode where if there is output
|
||||
# detected as written to the tty we redraw this part underneath
|
||||
# and erase the past draw of this same bit above?
|
||||
# pdb.sticky = True
|
||||
# pdb._print_if_sticky()
|
||||
# pdb_obj.sticky = True
|
||||
# pdb_obj._print_if_sticky()
|
||||
|
||||
# also see these links for an approach from ``ptk``:
|
||||
# https://github.com/goodboy/tractor/issues/130#issuecomment-663752040
|
||||
# https://github.com/prompt-toolkit/python-prompt-toolkit/blob/c2c6af8a0308f9e5d7c0e28cb8a02963fe0ce07a/prompt_toolkit/patch_stdout.py
|
||||
|
||||
pdb.do_longlist(None)
|
||||
print(pdb.prompt, end='', flush=True)
|
||||
pdb_obj.do_longlist(None)
|
||||
print(pdb_obj.prompt, end='', flush=True)
|
||||
|
||||
|
||||
@pdb.hideframe
|
||||
@cm
|
||||
def disable_sigint(
|
||||
pdb: Optional[PdbwTeardown] = None
|
||||
|
||||
) -> Iterator[None]:
|
||||
|
||||
__tracebackhide__ = True
|
||||
|
||||
# ensure the ``contextlib.contextmanager`` frame inside the wrapping
|
||||
# ``.__exit__()`` method isn't shown either.
|
||||
# frame = sys._getframe()
|
||||
# last_f = frame.f_back
|
||||
# last_f.f_globals['__tracebackhide__'] = True
|
||||
|
||||
# NOTE: this seems like a form of cpython bug wherein
|
||||
# it's likely that ``functools.WRAPPER_ASSIGNMENTS`` should
|
||||
# probably contain this attr name?
|
||||
|
||||
# for manual debugging if necessary
|
||||
# pdb.set_trace()
|
||||
|
||||
orig_handler = signal.signal(
|
||||
signal.SIGINT,
|
||||
partial(shield_sigint, pdb=pdb),
|
||||
)
|
||||
try:
|
||||
yield
|
||||
finally:
|
||||
signal.signal(
|
||||
signal.SIGINT,
|
||||
orig_handler
|
||||
)
|
||||
|
||||
|
||||
@pdb.hideframe
|
||||
def _set_trace(
|
||||
actor: Optional[tractor.Actor] = None
|
||||
actor: Optional[tractor.Actor] = None,
|
||||
pdb: Optional[MultiActorPdb] = None,
|
||||
):
|
||||
__tracebackhide__ = True
|
||||
actor = actor or tractor.current_actor()
|
||||
|
||||
with (
|
||||
_open_pdb() as pdb,
|
||||
disable_sigint(pdb=pdb),
|
||||
):
|
||||
# frame = sys._getframe()
|
||||
# last_f = frame.f_back
|
||||
# last_f.f_globals['__tracebackhide__'] = True
|
||||
|
||||
if actor is not None:
|
||||
log.pdb(f"\nAttaching pdb to actor: {actor.uid}\n")
|
||||
|
||||
|
|
@ -691,19 +695,17 @@ breakpoint = partial(
|
|||
)
|
||||
|
||||
|
||||
@pdb.hideframe
|
||||
def _post_mortem(actor):
|
||||
def _post_mortem(
|
||||
actor: tractor.Actor,
|
||||
pdb: MultiActorPdb,
|
||||
|
||||
__tracebackhide__ = True
|
||||
) -> None:
|
||||
'''
|
||||
Enter the ``pdbpp`` port mortem entrypoint using our custom
|
||||
debugger instance.
|
||||
|
||||
with (
|
||||
# noop()
|
||||
_open_pdb() as pdb,
|
||||
# disable_sigint(pdb=pdb),
|
||||
):
|
||||
'''
|
||||
log.pdb(f"\nAttaching to pdb in crashed actor: {actor.uid}\n")
|
||||
|
||||
# custom Pdb post-mortem entry
|
||||
pdbpp.xpm(Pdb=lambda: pdb)
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue