Hide `._rpc._invoke()` frame, again..

A partial revert of commit c05d08e426 since it seem we already
suppress tpt-closed errors lower down in `.ipc.Channel.send()`; given
that i'm pretty sure this new handler code should basically never run?

Left in a todo to remove the masked content once i'm done more
thoroughly testing under `piker`.

examples/trio/lockacquire_not_unmasked.py

@@ -0,0 +1,85 @@
+from contextlib import (
+    asynccontextmanager as acm,
+)
+from functools import partial
+
+import tractor
+import trio
+
+
+log = tractor.log.get_logger(
+    name=__name__
+)
+
+_lock: trio.Lock|None = None
+
+
+@acm
+async def acquire_singleton_lock(
+) -> None:
+    global _lock
+    if _lock is None:
+        log.info('Allocating LOCK')
+        _lock = trio.Lock()
+
+    log.info('TRYING TO LOCK ACQUIRE')
+    async with _lock:
+        log.info('ACQUIRED')
+        yield _lock
+
+    log.info('RELEASED')
+
+
+
+async def hold_lock_forever(
+    task_status=trio.TASK_STATUS_IGNORED
+):
+    async with (
+        tractor.trionics.maybe_raise_from_masking_exc(),
+        acquire_singleton_lock() as lock,
+    ):
+        task_status.started(lock)
+        await trio.sleep_forever()
+
+
+async def main(
+    ignore_special_cases: bool,
+    loglevel: str = 'info',
+    debug_mode: bool = True,
+):
+    async with (
+        trio.open_nursery() as tn,
+
+        # tractor.trionics.maybe_raise_from_masking_exc()
+        # ^^^ XXX NOTE, interestingly putting the unmasker
+        # here does not exhibit the same behaviour ??
+    ):
+        if not ignore_special_cases:
+            from tractor.trionics import _taskc
+            _taskc._mask_cases.clear()
+
+        _lock = await tn.start(
+            hold_lock_forever,
+        )
+        with trio.move_on_after(0.2):
+            await tn.start(
+                hold_lock_forever,
+            )
+
+        tn.cancel_scope.cancel()
+
+
+# XXX, manual test as script
+if __name__ == '__main__':
+    tractor.log.get_console_log(level='info')
+    for case in [True, False]:
+        log.info(
+            f'\n'
+            f'------ RUNNING SCRIPT TRIAL ------\n'
+            f'ignore_special_cases: {case!r}\n'
+        )
+        trio.run(partial(
+            main,
+            ignore_special_cases=case,
+            loglevel='info',
+        ))

examples/trio/send_chan_aclose_masks_beg.py

@@ -9,8 +9,10 @@ import tractor
 import trio
 
 
-log = tractor.log.get_logger(__name__)
-tractor.log.get_console_log('info')
+log = tractor.log.get_logger(
+    name=__name__
+)
+
 
 @cm
 def teardown_on_exc(
@@ -54,6 +56,7 @@ def teardown_on_exc(
 async def finite_stream_to_rent(
     tx: trio.abc.SendChannel,
     child_errors_mid_stream: bool,
+    raise_unmasked: bool,
 
     task_status: trio.TaskStatus[
         trio.CancelScope,
@@ -68,20 +71,41 @@ async def finite_stream_to_rent(
         # inside the child  task!
         #
         # TODO, uncomment next LoC to see the supprsessed beg[RTE]!
-        # tractor.trionics.maybe_raise_from_masking_exc(),
+        tractor.trionics.maybe_raise_from_masking_exc(
+            raise_unmasked=raise_unmasked,
+        ),
 
         tx as tx,  # .aclose() is the guilty masker chkpt!
-        trio.open_nursery() as _tn,
+
+        # XXX, this ONLY matters in the
+        # `child_errors_mid_stream=False` case oddly!?
+        # THAT IS, if no tn is opened in that case then the
+        # test will not fail; it raises the RTE correctly?
+        #
+        # -> so it seems this new scope somehow affects the form of
+        #    eventual in the parent EG?
+        tractor.trionics.maybe_open_nursery(
+            nursery=(
+                None
+                if not child_errors_mid_stream
+                else True
+            ),
+        ) as _tn,
     ):
         # pass our scope back to parent for supervision\
         # control.
-        task_status.started(_tn.cancel_scope)
+        cs: trio.CancelScope|None = (
+            None
+            if _tn is True
+            else _tn.cancel_scope
+        )
+        task_status.started(cs)
 
         with teardown_on_exc(
             raise_from_handler=not child_errors_mid_stream,
         ):
             for i in range(100):
-                log.info(
+                log.debug(
                     f'Child tx {i!r}\n'
                 )
                 if (
@@ -107,23 +131,31 @@ async def main(
     #   bug and raises.
     #
     child_errors_mid_stream: bool,
+
+    raise_unmasked: bool = False,
+    loglevel: str = 'info',
 ):
+    tractor.log.get_console_log(level=loglevel)
+
+    # the `.aclose()` being checkpoints on these
+    # is the source of the problem..
     tx, rx = trio.open_memory_channel(1)
 
     async with (
+        tractor.trionics.collapse_eg(),
         trio.open_nursery() as tn,
         rx as rx,
     ):
-
         _child_cs = await tn.start(
             partial(
                 finite_stream_to_rent,
                 child_errors_mid_stream=child_errors_mid_stream,
+                raise_unmasked=raise_unmasked,
                 tx=tx,
             )
         )
         async for msg in rx:
-            log.info(
+            log.debug(
                 f'Rent rx {msg!r}\n'
             )
 
@@ -139,7 +171,25 @@ async def main(
                 tn.cancel_scope.cancel()
 
 
+# XXX, manual test as script
 if __name__ == '__main__':
-
+    tractor.log.get_console_log(level='info')
     for case in [True, False]:
-        trio.run(main, case)
+        log.info(
+            f'\n'
+            f'------ RUNNING SCRIPT TRIAL ------\n'
+            f'child_errors_midstream: {case!r}\n'
+        )
+        try:
+            trio.run(partial(
+                main,
+                child_errors_mid_stream=case,
+                # raise_unmasked=True,
+                loglevel='info',
+            ))
+        except Exception as _exc:
+            exc = _exc
+            log.exception(
+                'Should have raised an RTE or Cancelled?\n'
+            )
+            breakpoint()

tests/test_docs_examples.py

@@ -95,6 +95,7 @@ def run_example_in_subproc(
             and 'integration' not in p[0]
             and 'advanced_faults' not in p[0]
             and 'multihost' not in p[0]
+            and 'trio' not in p[0]
         )
     ],
     ids=lambda t: t[1],

tests/test_inter_peer_cancellation.py

@@ -24,14 +24,10 @@ from tractor._testing import (
 )
 
 # XXX TODO cases:
-# - [ ] peer cancelled itself - so other peers should
-#   get errors reflecting that the peer was itself the .canceller?
-
 # - [x] WE cancelled the peer and thus should not see any raised
 #   `ContextCancelled` as it should be reaped silently?
 #   => pretty sure `test_context_stream_semantics::test_caller_cancels()`
 #      already covers this case?
-
 # - [x] INTER-PEER: some arbitrary remote peer cancels via
 #   Portal.cancel_actor().
 #   => all other connected peers should get that cancel requesting peer's
@@ -44,16 +40,6 @@ from tractor._testing import (
 #   that also spawned a remote task task in that same peer-parent.
 
 
-# def test_self_cancel():
-#     '''
-#     2 cases:
-#     - calls `Actor.cancel()` locally in some task
-#     - calls LocalPortal.cancel_actor()` ?
-
-#     '''
-#     ...
-
-
 @tractor.context
 async def open_stream_then_sleep_forever(
     ctx: Context,
@@ -806,7 +792,7 @@ async def basic_echo_server(
     ctx: Context,
     peer_name: str = 'wittle_bruv',
 
-    err_after: int|None = None,
+    err_after_imsg: int|None = None,
 
 ) -> None:
     '''
@@ -835,8 +821,9 @@ async def basic_echo_server(
             await ipc.send(resp)
 
             if (
-                err_after
-                and i > err_after
+                err_after_imsg
+                and
+                i > err_after_imsg
             ):
                 raise RuntimeError(
                     f'Simulated error in `{peer_name}`'
@@ -978,7 +965,8 @@ async def tell_little_bro(
     actor_name: str,
 
     caller: str = '',
-    err_after: int|None = None,
+    err_after: float|None = None,
+    rng_seed: int = 50,
 ):
     # contact target actor, do a stream dialog.
     async with (
@@ -989,14 +977,18 @@ async def tell_little_bro(
             basic_echo_server,
 
             # XXX proxy any delayed err condition
-            err_after=err_after,
+            err_after_imsg=(
+                err_after * rng_seed
+                if err_after is not None
+                else None
+            ),
         ) as (sub_ctx, first),
 
         sub_ctx.open_stream() as echo_ipc,
     ):
         actor: Actor = current_actor()
         uid: tuple = actor.uid
-        for i in range(100):
+        for i in range(rng_seed):
             msg: tuple = (
                 uid,
                 i,
@@ -1021,13 +1013,13 @@ async def tell_little_bro(
 )
 @pytest.mark.parametrize(
     'raise_sub_spawn_error_after',
-    [None, 50],
+    [None, 0.5],
 )
 def test_peer_spawns_and_cancels_service_subactor(
     debug_mode: bool,
     raise_client_error: str,
     reg_addr: tuple[str, int],
-    raise_sub_spawn_error_after: int|None,
+    raise_sub_spawn_error_after: float|None,
 ):
     # NOTE: this tests for the modden `mod wks open piker` bug
     # discovered as part of implementing workspace ctx
@@ -1041,6 +1033,7 @@ def test_peer_spawns_and_cancels_service_subactor(
     #   and the server's spawned child should cancel and terminate!
     peer_name: str = 'little_bro'
 
+
     def check_inner_rte(rae: RemoteActorError):
         '''
         Validate the little_bro's relayed inception!
@@ -1134,8 +1127,7 @@ def test_peer_spawns_and_cancels_service_subactor(
                         )
 
                     try:
-                        res = await client_ctx.result(hide_tb=False)
-
+                        res = await client_ctx.wait_for_result(hide_tb=False)
                         # in remote (relayed inception) error
                         # case, we should error on the line above!
                         if raise_sub_spawn_error_after:
@@ -1146,6 +1138,23 @@ def test_peer_spawns_and_cancels_service_subactor(
                         assert isinstance(res, ContextCancelled)
                         assert client_ctx.cancel_acked
                         assert res.canceller == root.uid
+                        assert not raise_sub_spawn_error_after
+
+                        # cancelling the spawner sub should
+                        # transitively cancel it's sub, the little
+                        # bruv.
+                        print('root cancelling server/client sub-actors')
+                        await spawn_ctx.cancel()
+                        async with tractor.find_actor(
+                            name=peer_name,
+                        ) as sub:
+                            assert not sub
+
+                    # XXX, only for tracing
+                    # except BaseException as _berr:
+                    #     berr = _berr
+                    #     await tractor.pause(shield=True)
+                    #     raise berr
 
                     except RemoteActorError as rae:
                         _err = rae
@@ -1174,19 +1183,8 @@ def test_peer_spawns_and_cancels_service_subactor(
                         raise
                         # await tractor.pause()
 
-                    else:
-                        assert not raise_sub_spawn_error_after
-
-                        # cancelling the spawner sub should
-                        # transitively cancel it's sub, the little
-                        # bruv.
-                        print('root cancelling server/client sub-actors')
-                        await spawn_ctx.cancel()
-                        async with tractor.find_actor(
-                            name=peer_name,
-                        ) as sub:
-                            assert not sub
 
+                    # await tractor.pause()
                     # await server.cancel_actor()
 
             except RemoteActorError as rae:
@@ -1199,7 +1197,7 @@ def test_peer_spawns_and_cancels_service_subactor(
 
             # since we called `.cancel_actor()`, `.cancel_ack`
             # will not be set on the ctx bc `ctx.cancel()` was not
-            # called directly fot this confext.
+            # called directly for this confext.
             except ContextCancelled as ctxc:
                 _ctxc = ctxc
                 print(
@@ -1239,12 +1237,19 @@ def test_peer_spawns_and_cancels_service_subactor(
 
                 # assert spawn_ctx.cancelled_caught
 
+    async def _main():
+        with trio.fail_after(
+            3 if not debug_mode
+            else 999
+        ):
+            await main()
+
     if raise_sub_spawn_error_after:
         with pytest.raises(RemoteActorError) as excinfo:
-            trio.run(main)
+            trio.run(_main)
 
         rae: RemoteActorError = excinfo.value
         check_inner_rte(rae)
 
     else:
-        trio.run(main)
+        trio.run(_main)

tests/test_log_sys.py

@@ -0,0 +1,177 @@
+'''
+`tractor.log`-wrapping unit tests.
+
+'''
+import importlib
+from pathlib import Path
+import shutil
+import sys
+from types import ModuleType
+
+import pytest
+import tractor
+
+
+def test_root_pkg_not_duplicated_in_logger_name():
+    '''
+    When both `pkg_name` and `name` are passed and they have
+    a common `<root_name>.< >` prefix, ensure that it is not
+    duplicated in the child's `StackLevelAdapter.name: str`.
+
+    '''
+    project_name: str = 'pylib'
+    pkg_path: str = 'pylib.subpkg.mod'
+
+    proj_log = tractor.log.get_logger(
+        pkg_name=project_name,
+        mk_sublog=False,
+    )
+
+    sublog = tractor.log.get_logger(
+        pkg_name=project_name,
+        name=pkg_path,
+    )
+
+    assert proj_log is not sublog
+    assert sublog.name.count(proj_log.name) == 1
+    assert 'mod' not in sublog.name
+
+
+# ?TODO, move this into internal libs?
+# -[ ] we already use it in `modden.config._pymod` as well
+def load_module_from_path(
+    path: Path,
+    module_name: str|None = None,
+) -> ModuleType:
+    '''
+    Taken from SO,
+    https://stackoverflow.com/a/67208147
+
+    which is based on stdlib docs,
+    https://docs.python.org/3/library/importlib.html#importing-a-source-file-directly
+
+    '''
+    module_name = module_name or path.stem
+    spec = importlib.util.spec_from_file_location(
+        module_name,
+        str(path),
+    )
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[module_name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_implicit_mod_name_applied_for_child(
+    testdir: pytest.Pytester,
+    loglevel: str,
+):
+    '''
+    Verify that when `.log.get_logger(pkg_name='pylib')` is called
+    from a given sub-mod from within the `pylib` pkg-path, we
+    implicitly set the equiv of `name=__name__` from the caller's
+    module.
+
+    '''
+    # tractor.log.get_console_log(level=loglevel)
+    proj_name: str = 'snakelib'
+    mod_code: str = (
+        f'import tractor\n'
+        f'\n'
+        f'log = tractor.log.get_logger(pkg_name="{proj_name}")\n'
+    )
+
+    # create a sub-module for each pkg layer
+    _lib = testdir.mkpydir(proj_name)
+    pkg: Path = Path(_lib)
+    subpkg: Path = pkg / 'subpkg'
+    subpkg.mkdir()
+
+    pkgmod: Path = subpkg / "__init__.py"
+    pkgmod.touch()
+
+    _submod: Path = testdir.makepyfile(
+        _mod=mod_code,
+    )
+
+    pkg_mod = pkg / 'mod.py'
+    pkg_subpkg_submod = subpkg / 'submod.py'
+    shutil.copyfile(
+        _submod,
+        pkg_mod,
+    )
+    shutil.copyfile(
+        _submod,
+        pkg_subpkg_submod,
+    )
+    testdir.chdir()
+
+    # XXX NOTE, once the "top level" pkg mod has been
+    # imported, we can then use `import` syntax to
+    # import it's sub-pkgs and modules.
+    pkgmod = load_module_from_path(
+        Path(pkg / '__init__.py'),
+        module_name=proj_name,
+    )
+    pkg_root_log = tractor.log.get_logger(
+        pkg_name=proj_name,
+        mk_sublog=False,
+    )
+    assert pkg_root_log.name == proj_name
+    assert not pkg_root_log.logger.getChildren()
+
+    from snakelib import mod
+    assert mod.log.name == proj_name
+
+    from snakelib.subpkg import submod
+    assert (
+        submod.log.name
+        ==
+        submod.__package__  # ?TODO, use this in `.get_logger()` instead?
+        ==
+        f'{proj_name}.subpkg'
+    )
+
+    sub_logs = pkg_root_log.logger.getChildren()
+    assert len(sub_logs) == 1  # only one nested sub-pkg module
+    assert submod.log.logger in sub_logs
+
+    # breakpoint()
+
+
+# TODO, moar tests against existing feats:
+# ------ - ------
+# - [ ] color settings?
+# - [ ] header contents like,
+#   - actor + thread + task names from various conc-primitives,
+# - [ ] `StackLevelAdapter` extensions,
+#   - our custom levels/methods: `transport|runtime|cance|pdb|devx`
+# - [ ] custom-headers support?
+#
+
+# TODO, test driven dev of new-ideas/long-wanted feats,
+# ------ - ------
+# - [ ] https://github.com/goodboy/tractor/issues/244
+#  - [ ] @catern mentioned using a sync / deterministic sys
+#       and in particular `svlogd`?
+#       |_ https://smarden.org/runit/svlogd.8
+
+# - [ ] using adapter vs. filters?
+#    - https://stackoverflow.com/questions/60691759/add-information-to-every-log-message-in-python-logging/61830838#61830838
+
+# - [ ] `.at_least_level()` optimization which short circuits wtv
+#      `logging` is doing behind the scenes when the level filters
+#      the emission..?
+
+# - [ ] use of `.log.get_console_log()` in subactors and the
+#    subtleties of ensuring it actually emits from a subproc.
+
+# - [ ] this idea of activating per-subsys emissions with some
+#    kind of `.name` filter passed to the runtime or maybe configured
+#    via the root `StackLevelAdapter`?
+
+# - [ ] use of `logging.dict.dictConfig()` to simplify the impl
+#      of any of ^^ ??
+#    - https://stackoverflow.com/questions/7507825/where-is-a-complete-example-of-logging-config-dictconfig
+#    - https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema
+#    - https://docs.python.org/3/library/logging.config.html#logging.config.dictConfig

tests/test_oob_cancellation.py

@@ -0,0 +1,239 @@
+'''
+Define the details of inter-actor "out-of-band" (OoB) cancel
+semantics, that is how cancellation works when a cancel request comes
+from the different concurrency (primitive's) "layer" then where the
+eventual `trio.Task` actually raises a signal.
+
+'''
+from functools import partial
+# from contextlib import asynccontextmanager as acm
+# import itertools
+
+import pytest
+import trio
+import tractor
+from tractor import (  # typing
+    ActorNursery,
+    Portal,
+    Context,
+    # ContextCancelled,
+    # RemoteActorError,
+)
+# from tractor._testing import (
+#     tractor_test,
+#     expect_ctxc,
+# )
+
+# XXX TODO cases:
+# - [ ] peer cancelled itself - so other peers should
+#   get errors reflecting that the peer was itself the .canceller?
+
+# def test_self_cancel():
+#     '''
+#     2 cases:
+#     - calls `Actor.cancel()` locally in some task
+#     - calls LocalPortal.cancel_actor()` ?
+#
+# things to ensure!
+# -[ ] the ctxc raised in a child should ideally show the tb of the
+#     underlying `Cancelled` checkpoint, i.e.
+#     `raise scope_error from ctxc`?
+#
+# -[ ] a self-cancelled context, if not allowed to block on
+#     `ctx.result()` at some point will hang since the `ctx._scope`
+#     is never `.cancel_called`; cases for this include,
+#     - an `open_ctx()` which never starteds before being OoB actor
+#       cancelled.
+#       |_ parent task will be blocked in `.open_context()` for the
+#         `Started` msg, and when the OoB ctxc arrives `ctx._scope`
+#         will never have been signalled..
+
+#     '''
+#     ...
+
+# TODO, sanity test against the case in `/examples/trio/lockacquire_not_unmasked.py`
+# but with the `Lock.acquire()` from a `@context` to ensure the
+# implicit ignore-case-non-unmasking.
+#
+# @tractor.context
+# async def acquire_actor_global_lock(
+#     ctx: tractor.Context,
+#     ignore_special_cases: bool,
+# ):
+
+#     async with maybe_unmask_excs(
+#         ignore_special_cases=ignore_special_cases,
+#     ):
+#         await ctx.started('locked')
+
+#     # block til cancelled
+#     await trio.sleep_forever()
+
+
+@tractor.context
+async def sleep_forever(
+    ctx: tractor.Context,
+    # ignore_special_cases: bool,
+    do_started: bool,
+):
+
+    # async with maybe_unmask_excs(
+    #     ignore_special_cases=ignore_special_cases,
+    # ):
+    #     await ctx.started('locked')
+    if do_started:
+        await ctx.started()
+
+    # block til cancelled
+    print('sleepin on child-side..')
+    await trio.sleep_forever()
+
+
+@pytest.mark.parametrize(
+    'cancel_ctx',
+    [True, False],
+)
+def test_cancel_ctx_with_parent_side_entered_in_bg_task(
+    debug_mode: bool,
+    loglevel: str,
+    cancel_ctx: bool,
+):
+    '''
+    The most "basic" out-of-band-task self-cancellation case where
+    `Portal.open_context()` is entered in a bg task and the
+    parent-task (of the containing nursery) calls `Context.cancel()`
+    without the child knowing; the `Context._scope` should be
+    `.cancel_called` when the IPC ctx's child-side relays
+    a `ContextCancelled` with a `.canceller` set to the parent
+    actor('s task).
+
+    '''
+    async def main():
+        with trio.fail_after(
+            2 if not debug_mode else 999,
+        ):
+            an: ActorNursery
+            async with (
+                tractor.open_nursery(
+                    debug_mode=debug_mode,
+                    loglevel='devx',
+                    enable_stack_on_sig=True,
+                ) as an,
+                trio.open_nursery() as tn,
+            ):
+                ptl: Portal = await an.start_actor(
+                    'sub',
+                    enable_modules=[__name__],
+                )
+
+                async def _open_ctx_async(
+                    do_started: bool = True,
+                    task_status=trio.TASK_STATUS_IGNORED,
+                ):
+                    # do we expect to never enter the
+                    # `.open_context()` below.
+                    if not do_started:
+                        task_status.started()
+
+                    async with ptl.open_context(
+                        sleep_forever,
+                        do_started=do_started,
+                    ) as (ctx, first):
+                        task_status.started(ctx)
+                        await trio.sleep_forever()
+
+                # XXX, this is the key OoB part!
+                #
+                # - start the `.open_context()` in a bg task which
+                #   blocks inside the embedded scope-body,
+                #
+                # -  when we call `Context.cancel()` it **is
+                #   not** from the same task which eventually runs
+                #   `.__aexit__()`,
+                #
+                # - since the bg "opener" task will be in
+                #   a `trio.sleep_forever()`, it must be interrupted
+                #   by the `ContextCancelled` delivered from the
+                #   child-side; `Context._scope: CancelScope` MUST
+                #   be `.cancel_called`!
+                #
+                print('ASYNC opening IPC context in subtask..')
+                maybe_ctx: Context|None = await tn.start(partial(
+                    _open_ctx_async,
+                ))
+
+                if (
+                    maybe_ctx
+                    and
+                    cancel_ctx
+                ):
+                    print('cancelling first IPC ctx!')
+                    await maybe_ctx.cancel()
+
+                # XXX, note that despite `maybe_context.cancel()`
+                # being called above, it's the parent (bg) task
+                # which was originally never interrupted in
+                # the `ctx._scope` body due to missing case logic in
+                # `ctx._maybe_cancel_and_set_remote_error()`.
+                #
+                # It didn't matter that the subactor process was
+                # already terminated and reaped, nothing was
+                # cancelling the ctx-parent task's scope!
+                #
+                print('cancelling subactor!')
+                await ptl.cancel_actor()
+
+                if maybe_ctx:
+                    try:
+                        await maybe_ctx.wait_for_result()
+                    except tractor.ContextCancelled as ctxc:
+                        assert not cancel_ctx
+                        assert (
+                            ctxc.canceller
+                            ==
+                            tractor.current_actor().aid.uid
+                        )
+                        # don't re-raise since it'll trigger
+                        # an EG from the above tn.
+
+    if cancel_ctx:
+        # graceful self-cancel
+        trio.run(main)
+
+    else:
+        # ctx parent task should see OoB ctxc due to
+        # `ptl.cancel_actor()`.
+        with pytest.raises(tractor.ContextCancelled) as excinfo:
+            trio.run(main)
+
+        assert 'root' in excinfo.value.canceller[0]
+
+
+# def test_parent_actor_cancels_subactor_with_gt1_ctxs_open_to_it(
+#     debug_mode: bool,
+#     loglevel: str,
+# ):
+#     '''
+#     Demos OoB cancellation from the perspective of a ctx opened with
+#     a child subactor where the parent cancels the child at the "actor
+#     layer" using `Portal.cancel_actor()` and thus the
+#     `ContextCancelled.canceller` received by the ctx's parent-side
+#     task will appear to be a "self cancellation" even though that
+#     specific task itself was not cancelled and thus
+#     `Context.cancel_called ==False`.
+#     '''
+                # TODO, do we have an existing implied ctx
+                # cancel test like this?
+                # with trio.move_on_after(0.5):# as cs:
+                #     await _open_ctx_async(
+                #         do_started=False,
+                #     )
+
+
+                # in-line ctx scope should definitely raise
+                # a ctxc with `.canceller = 'root'`
+                # async with ptl.open_context(
+                #     sleep_forever,
+                #     do_started=True,
+                # ) as pair:
+

tests/test_trioisms.py

@@ -6,11 +6,18 @@ want to see changed.
 from contextlib import (
     asynccontextmanager as acm,
 )
+from types import ModuleType
+
+from functools import partial
 
 import pytest
+from _pytest import pathlib
 from tractor.trionics import collapse_eg
 import trio
 from trio import TaskStatus
+from tractor._testing import (
+    examples_dir,
+)
 
 
 @pytest.mark.parametrize(
@@ -106,8 +113,9 @@ def test_acm_embedded_nursery_propagates_enter_err(
     debug_mode: bool,
 ):
     '''
-    Demo how a masking `trio.Cancelled` could be handled by unmasking from the
-    `.__context__` field when a user (by accident) re-raises from a `finally:`.
+    Demo how a masking `trio.Cancelled` could be handled by unmasking
+    from the `.__context__` field when a user (by accident) re-raises
+    from a `finally:`.
 
     '''
     import tractor
@@ -158,13 +166,13 @@ def test_acm_embedded_nursery_propagates_enter_err(
     assert len(assert_eg.exceptions) == 1
 
 
-
 def test_gatherctxs_with_memchan_breaks_multicancelled(
     debug_mode: bool,
 ):
     '''
-    Demo how a using an `async with sndchan` inside a `.trionics.gather_contexts()` task
-    will break a strict-eg-tn's multi-cancelled absorption..
+    Demo how a using an `async with sndchan` inside
+    a `.trionics.gather_contexts()` task will break a strict-eg-tn's
+    multi-cancelled absorption..
 
     '''
     from tractor import (
@@ -190,7 +198,6 @@ def test_gatherctxs_with_memchan_breaks_multicancelled(
                 f'Closed {task!r}\n'
             )
 
-
     async def main():
         async with (
             # XXX should ensure ONLY the KBI
@@ -211,3 +218,85 @@ def test_gatherctxs_with_memchan_breaks_multicancelled(
 
     with pytest.raises(KeyboardInterrupt):
         trio.run(main)
+
+
+@pytest.mark.parametrize(
+    'raise_unmasked', [
+        True,
+        pytest.param(
+            False,
+            marks=pytest.mark.xfail(
+                reason="see examples/trio/send_chan_aclose_masks.py"
+            )
+        ),
+    ]
+)
+@pytest.mark.parametrize(
+    'child_errors_mid_stream',
+    [True, False],
+)
+def test_unmask_aclose_as_checkpoint_on_aexit(
+    raise_unmasked: bool,
+    child_errors_mid_stream: bool,
+    debug_mode: bool,
+):
+    '''
+    Verify that our unmasker util works over the common case where
+    a mem-chan's `.aclose()` is included in an `@acm` stack
+    and it being currently a checkpoint, can `trio.Cancelled`-mask an embedded
+    exception from user code resulting in a silent failure which
+    appears like graceful cancellation.
+
+    This test suite is mostly implemented as an example script so it
+    could more easily be shared with `trio`-core peeps as `tractor`-less
+    minimum reproducing example.
+
+    '''
+    mod: ModuleType = pathlib.import_path(
+        examples_dir()
+        / 'trio'
+        / 'send_chan_aclose_masks_beg.py',
+        root=examples_dir(),
+        consider_namespace_packages=False,
+    )
+    with pytest.raises(RuntimeError):
+        trio.run(partial(
+            mod.main,
+            raise_unmasked=raise_unmasked,
+            child_errors_mid_stream=child_errors_mid_stream,
+        ))
+
+
+
+@pytest.mark.parametrize(
+    'ignore_special_cases', [
+        True,
+        pytest.param(
+            False,
+            marks=pytest.mark.xfail(
+                reason="see examples/trio/lockacquire_not_umasked.py"
+            )
+        ),
+    ]
+)
+def test_cancelled_lockacquire_in_ipctx_not_unmasked(
+    ignore_special_cases: bool,
+    loglevel: str,
+    debug_mode: bool,
+):
+    mod: ModuleType = pathlib.import_path(
+        examples_dir()
+        / 'trio'
+        / 'lockacquire_not_unmasked.py',
+        root=examples_dir(),
+        consider_namespace_packages=False,
+    )
+    async def _main():
+        with trio.fail_after(2):
+            await mod.main(
+                ignore_special_cases=ignore_special_cases,
+                loglevel=loglevel,
+                debug_mode=debug_mode,
+            )
+
+    trio.run(_main)

tractor/_context.py

@@ -442,25 +442,25 @@ class Context:
         '''
         Records whether cancellation has been requested for this context
         by a call to  `.cancel()` either due to,
-        - either an explicit call by some local task,
+        - an explicit call by some local task,
         - or an implicit call due to an error caught inside
-          the ``Portal.open_context()`` block.
+          the `Portal.open_context()` block.
 
         '''
         return self._cancel_called
 
-    @cancel_called.setter
-    def cancel_called(self, val: bool) -> None:
-        '''
-        Set the self-cancelled request `bool` value.
+    # XXX, to debug who frickin sets it..
+    # @cancel_called.setter
+    # def cancel_called(self, val: bool) -> None:
+    #     '''
+    #     Set the self-cancelled request `bool` value.
 
-        '''
-        # to debug who frickin sets it..
-        # if val:
-        #     from .devx import pause_from_sync
-        #     pause_from_sync()
+    #     '''
+    #     if val:
+    #         from .devx import pause_from_sync
+    #         pause_from_sync()
 
-        self._cancel_called = val
+    #     self._cancel_called = val
 
     @property
     def canceller(self) -> tuple[str, str]|None:
@@ -635,6 +635,71 @@ class Context:
         '''
         await self.chan.send(Stop(cid=self.cid))
 
+    @property
+    def parent_task(self) -> trio.Task:
+        '''
+        This IPC context's "owning task" which is a `trio.Task`
+        on one of the "sides" of the IPC.
+
+        Note that the "parent_" prefix here refers to the local
+        `trio` task tree using the same interface as
+        `trio.Nursery.parent_task` whereas for IPC contexts,
+        a different cross-actor task hierarchy exists:
+
+        - a "parent"-side which originally entered
+          `Portal.open_context()`,
+
+        - the "child"-side which was spawned and scheduled to invoke
+          a function decorated with `@tractor.context`.
+
+        This task is thus a handle to mem-domain-distinct/per-process
+        `Nursery.parent_task` depending on in which of the above
+        "sides" this context exists.
+
+        '''
+        return self._task
+
+    def _is_blocked_on_rx_chan(self) -> bool:
+        '''
+        Predicate to indicate whether the owner `._task: trio.Task` is
+        currently blocked (by `.receive()`-ing) on its underlying RPC
+        feeder `._rx_chan`.
+
+        This knowledge is highly useful when handling so called
+        "out-of-band" (OoB) cancellation conditions where a peer
+        actor's task transmitted some remote error/cancel-msg and we
+        must know whether to signal-via-cancel currently executing
+        "user-code" (user defined code embedded in `ctx._scope`) or
+        simply to forward the IPC-msg-as-error **without calling**
+        `._scope.cancel()`.
+
+        In the latter case it is presumed that if the owner task is
+        blocking for the next IPC msg, it will eventually receive,
+        process and raise the equivalent local error **without**
+        requiring `._scope.cancel()` to be explicitly called by the
+        *delivering OoB RPC-task* (via `_deliver_msg()`).
+
+        '''
+        # NOTE, see the mem-chan meth-impls for *why* this
+        # logic works,
+        # `trio._channel.MemoryReceiveChannel.receive[_nowait]()`
+        #
+        # XXX realize that this is NOT an
+        # official/will-be-loudly-deprecated API:
+        # - https://trio.readthedocs.io/en/stable/reference-lowlevel.html#trio.lowlevel.Task.custom_sleep_data
+        #  |_https://trio.readthedocs.io/en/stable/reference-lowlevel.html#trio.lowlevel.wait_task_rescheduled
+        #
+        # orig repo intro in the mem-chan change over patch:
+        # - https://github.com/python-trio/trio/pull/586#issuecomment-414039117
+        #  |_https://github.com/python-trio/trio/pull/616
+        #  |_https://github.com/njsmith/trio/commit/98c38cef6f62e731bf8c7190e8756976bface8f0
+        #
+        return (
+            self._task.custom_sleep_data
+            is
+            self._rx_chan
+        )
+
     def _maybe_cancel_and_set_remote_error(
         self,
         error: BaseException,
@@ -787,13 +852,27 @@ class Context:
         if self._canceller is None:
             log.error('Ctx has no canceller set!?')
 
+        cs: trio.CancelScope = self._scope
+
+        # ?TODO? see comment @ .start_remote_task()`
+        #
+        # if not cs:
+        #     from .devx import mk_pdb
+        #     mk_pdb().set_trace()
+        #     raise RuntimeError(
+        #         f'IPC ctx was not be opened prior to remote error delivery !?\n'
+        #         f'{self}\n'
+        #         f'\n'
+        #         f'`Portal.open_context()` must be entered (somewhere) beforehand!\n'
+        #     )
+
         # Cancel the local `._scope`, catch that
         # `._scope.cancelled_caught` and re-raise any remote error
         # once exiting (or manually calling `.wait_for_result()`) the
         # `.open_context()`  block.
-        cs: trio.CancelScope = self._scope
         if (
             cs
+            and not cs.cancel_called
 
             # XXX this is an expected cancel request response
             # message and we **don't need to raise it** in the
@@ -802,8 +881,7 @@ class Context:
             # if `._cancel_called` then `.cancel_acked and .cancel_called`
             # always should be set.
             and not self._is_self_cancelled()
-            and not cs.cancel_called
-            and not cs.cancelled_caught
+            # and not cs.cancelled_caught
         ):
             if (
                 msgerr
@@ -814,7 +892,7 @@ class Context:
                 not self._cancel_on_msgerr
             ):
                 message: str = (
-                    'NOT Cancelling `Context._scope` since,\n'
+                    f'NOT Cancelling `Context._scope` since,\n'
                     f'Context._cancel_on_msgerr = {self._cancel_on_msgerr}\n\n'
                     f'AND we got a msg-type-error!\n'
                     f'{error}\n'
@@ -824,13 +902,43 @@ class Context:
                 # `trio.Cancelled` subtype here ;)
                 # https://github.com/goodboy/tractor/issues/368
                 message: str = 'Cancelling `Context._scope` !\n\n'
-                # from .devx import pause_from_sync
-                # pause_from_sync()
-                self._scope.cancel()
-        else:
-            message: str = 'NOT cancelling `Context._scope` !\n\n'
+                cs.cancel()
+
+        # TODO, explicit condition for OoB (self-)cancellation?
+        # - we called `Portal.cancel_actor()` from this actor
+        #   and the peer ctx task delivered ctxc due to it.
+        # - currently `self._is_self_cancelled()` will be true
+        #   since the ctxc.canceller check will match us even though it
+        #   wasn't from this ctx specifically!
+        elif (
+            cs
+            and self._is_self_cancelled()
+            and not cs.cancel_called
+        ):
+            message: str = (
+                'Cancelling `ctx._scope` due to OoB self-cancel ?!\n'
+                '\n'
+            )
             # from .devx import mk_pdb
             # mk_pdb().set_trace()
+            # TODO XXX, required to fix timeout failure in
+            # `test_cancelled_lockacquire_in_ipctx_not_unmaskeed`
+            #
+
+            # XXX NOTE XXX, this is SUPER SUBTLE!
+            # we only want to cancel our embedded `._scope`
+            # if the ctx's current/using task is NOT blocked
+            # on `._rx_chan.receive()` and on some other
+            # `trio`-checkpoint since in the former case
+            # any `._remote_error` will be relayed through
+            # the rx-chan and appropriately raised by the owning
+            # `._task` directly. IF the owner task is however
+            # blocking elsewhere we need to interrupt it **now**.
+            if not self._is_blocked_on_rx_chan():
+                cs.cancel()
+        else:
+            # rx_stats = self._rx_chan.statistics()
+            message: str = 'NOT cancelling `Context._scope` !\n\n'
 
         fmt_str: str = 'No `self._scope: CancelScope` was set/used ?\n'
         if (
@@ -854,6 +962,7 @@ class Context:
                 +
                 cs_fmt
             )
+
         log.cancel(
             message
             +
@@ -946,8 +1055,9 @@ class Context:
 
         '''
         side: str = self.side
-        # XXX for debug via the `@.setter`
-        self.cancel_called = True
+        self._cancel_called = True
+        # ^ XXX for debug via the `@.setter`
+        # self.cancel_called = True
 
         header: str = (
             f'Cancelling ctx from {side!r}-side\n'
@@ -2011,6 +2121,9 @@ async def open_context_from_portal(
             f'|_{portal.actor}\n'
         )
 
+    # ?TODO? could we move this to inside the `tn` block?
+    # -> would allow doing `ctx.parent_task = tn.parent_task` ?
+    # -> would allow a `if not ._scope: => raise RTE` ?
     ctx: Context = await portal.actor.start_remote_task(
         portal.channel,
         nsf=nsf,
@@ -2037,6 +2150,7 @@ async def open_context_from_portal(
     scope_err: BaseException|None = None
     ctxc_from_child: ContextCancelled|None = None
     try:
+        # from .devx import pause
         async with (
             collapse_eg(),
             trio.open_nursery() as tn,
@@ -2059,6 +2173,10 @@ async def open_context_from_portal(
             # the dialog, the `Error` msg should be raised from the `msg`
             # handling block below.
             try:
+                log.runtime(
+                    f'IPC ctx parent waiting on Started msg..\n'
+                    f'ctx.cid: {ctx.cid!r}\n'
+                )
                 started_msg, first = await ctx._pld_rx.recv_msg(
                     ipc=ctx,
                     expect_msg=Started,
@@ -2067,16 +2185,16 @@ async def open_context_from_portal(
                 )
             except trio.Cancelled as taskc:
                 ctx_cs: trio.CancelScope = ctx._scope
+                log.cancel(
+                    f'IPC ctx was cancelled during "child" task sync due to\n\n'
+                    f'.cid: {ctx.cid!r}\n'
+                    f'.maybe_error: {ctx.maybe_error!r}\n'
+                )
+                # await pause(shield=True)
+
                 if not ctx_cs.cancel_called:
                     raise
 
-                # from .devx import pause
-                # await pause(shield=True)
-
-                log.cancel(
-                    'IPC ctx was cancelled during "child" task sync due to\n\n'
-                    f'{ctx.maybe_error}\n'
-                )
                 # OW if the ctx's scope was cancelled manually,
                 # likely the `Context` was cancelled via a call to
                 # `._maybe_cancel_and_set_remote_error()` so ensure
@@ -2199,7 +2317,7 @@ async def open_context_from_portal(
         #   documenting it as a definittive example of
         #   debugging the tractor-runtime itself using it's
         #   own `.devx.` tooling!
-        # 
+        #
         # await debug.pause()
 
         # CASE 2: context was cancelled by local task calling
@@ -2272,13 +2390,16 @@ async def open_context_from_portal(
         match scope_err:
             case trio.Cancelled():
                 logmeth = log.cancel
+                cause: str = 'cancelled'
 
             # XXX explicitly report on any non-graceful-taskc cases
             case _:
+                cause: str = 'errored'
                 logmeth = log.exception
 
         logmeth(
-            f'ctx {ctx.side!r}-side exited with {ctx.repr_outcome()!r}\n'
+            f'ctx {ctx.side!r}-side {cause!r} with,\n'
+            f'{ctx.repr_outcome()!r}\n'
         )
 
         if debug_mode():
@@ -2303,6 +2424,7 @@ async def open_context_from_portal(
         # told us it's cancelled ;p
         if ctxc_from_child is None:
             try:
+                # await pause(shield=True)
                 await ctx.cancel()
             except (
                 trio.BrokenResourceError,
@@ -2459,8 +2581,10 @@ async def open_context_from_portal(
                 log.cancel(
                     f'Context cancelled by local {ctx.side!r}-side task\n'
                     f'c)>\n'
-                    f' |_{ctx._task}\n\n'
-                    f'{repr(scope_err)}\n'
+                    f'  |_{ctx.parent_task}\n'
+                    f'   .cid={ctx.cid!r}\n'
+                    f'\n'
+                    f'{scope_err!r}\n'
                 )
 
             # TODO: should we add a `._cancel_req_received`

tractor/_rpc.py

@@ -284,6 +284,10 @@ async def _errors_relayed_via_ipc(
     try:
         yield  # run RPC invoke body
 
+    except TransportClosed:
+        log.exception('Tpt disconnect during remote-exc relay?')
+        raise
+
     # box and ship RPC errors for wire-transit via
     # the task's requesting parent IPC-channel.
     except (
@@ -319,6 +323,9 @@ async def _errors_relayed_via_ipc(
                         and debug_kbis
                     )
                 )
+                # TODO? better then `debug_filter` below?
+                and
+                not isinstance(err, TransportClosed)
             ):
                 # XXX QUESTION XXX: is there any case where we'll
                 # want to debug IPC disconnects as a default?
@@ -327,13 +334,25 @@ async def _errors_relayed_via_ipc(
                 # recovery logic - the only case is some kind of
                 # strange bug in our transport layer itself? Going
                 # to keep this open ended for now.
-                log.debug(
-                    'RPC task crashed, attempting to enter debugger\n'
-                    f'|_{ctx}'
-                )
+
+                if _state.debug_mode():
+                    log.exception(
+                        f'RPC task crashed!\n'
+                        f'Attempting to enter debugger\n'
+                        f'\n'
+                        f'{ctx}'
+                    )
+
                 entered_debug = await debug._maybe_enter_pm(
                     err,
                     api_frame=inspect.currentframe(),
+
+                    # don't REPL any psuedo-expected tpt-disconnect
+                    # debug_filter=lambda exc: (
+                    #     type (exc) not in {
+                    #         TransportClosed,
+                    #     }
+                    # ),
                 )
                 if not entered_debug:
                     # if we prolly should have entered the REPL but
@@ -675,6 +694,22 @@ async def _invoke(
                     f'{pretty_struct.pformat(return_msg)}\n'
                 )
                 await chan.send(return_msg)
+                # ?TODO, remove the below since .send() already
+                # doesn't raise on tpt-closed?
+                # try:
+                #     await chan.send(return_msg)
+                # except TransportClosed:
+                #     log.exception(
+                #         f"Failed send final result to 'parent'-side of IPC-ctx!\n"
+                #         f'\n'
+                #         f'{chan}\n'
+                #         f'Channel already disconnected ??\n'
+                #         f'\n'
+                #         f'{pretty_struct.pformat(return_msg)}'
+                #     )
+                #     # ?TODO? will this ever be true though?
+                #     if chan.connected():
+                #         raise
 
             # NOTE: this happens IFF `ctx._scope.cancel()` is
             # called by any of,

tractor/_supervise.py

@@ -446,12 +446,12 @@ class ActorNursery:
 @acm
 async def _open_and_supervise_one_cancels_all_nursery(
     actor: Actor,
-    tb_hide: bool = False,
+    hide_tb: bool = True,
 
 ) -> typing.AsyncGenerator[ActorNursery, None]:
 
     # normally don't need to show user by default
-    __tracebackhide__: bool = tb_hide
+    __tracebackhide__: bool = hide_tb
 
     outer_err: BaseException|None = None
     inner_err: BaseException|None = None

tractor/devx/debug/_trace.py

@@ -561,6 +561,9 @@ async def _pause(
             return
 
         elif isinstance(pause_err, trio.Cancelled):
+            __tracebackhide__: bool = False
+            # XXX, unmask to REPL it.
+            # mk_pdb().set_trace(frame=inspect.currentframe())
             _repl_fail_report += (
                 'You called `tractor.pause()` from an already cancelled scope!\n\n'
                 'Consider `await tractor.pause(shield=True)` to make it work B)\n'

tractor/log.py

@@ -14,11 +14,22 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-"""
-Log like a forester!
+'''
+An enhanced logging subsys.
 
-"""
+An extended logging layer using (for now) the stdlib's `logging`
++ `colorlog` which embeds concurrency-primitive/runtime info into
+records (headers) to help you better grok your distributed systems
+built on `tractor`.
+
+
+'''
 from collections.abc import Mapping
+from inspect import (
+    FrameInfo,
+    getmodule,
+    stack,
+)
 import sys
 import logging
 from logging import (
@@ -26,8 +37,10 @@ from logging import (
     Logger,
     StreamHandler,
 )
-import colorlog  # type: ignore
+from types import ModuleType
+import warnings
 
+import colorlog  # type: ignore
 import trio
 
 from ._state import current_actor
@@ -39,7 +52,7 @@ _default_loglevel: str = 'ERROR'
 # Super sexy formatting thanks to ``colorlog``.
 # (NOTE: we use the '{' format style)
 # Here, `thin_white` is just the layperson's gray.
-LOG_FORMAT = (
+LOG_FORMAT: str = (
     # "{bold_white}{log_color}{asctime}{reset}"
     "{log_color}{asctime}{reset}"
     " {bold_white}{thin_white}({reset}"
@@ -51,7 +64,7 @@ LOG_FORMAT = (
     " {reset}{bold_white}{thin_white}{message}"
 )
 
-DATE_FORMAT = '%b %d %H:%M:%S'
+DATE_FORMAT: str = '%b %d %H:%M:%S'
 
 # FYI, ERROR is 40
 # TODO: use a `bidict` to avoid the :155 check?
@@ -75,7 +88,10 @@ STD_PALETTE = {
     'TRANSPORT': 'cyan',
 }
 
-BOLD_PALETTE = {
+BOLD_PALETTE: dict[
+    str,
+    dict[int, str],
+] = {
     'bold': {
         level: f"bold_{color}" for level, color in STD_PALETTE.items()}
 }
@@ -97,10 +113,17 @@ def at_least_level(
     return False
 
 
-# TODO: this isn't showing the correct '{filename}'
-# as it did before..
+# TODO, compare with using a "filter" instead?
+# - https://stackoverflow.com/questions/60691759/add-information-to-every-log-message-in-python-logging/61830838#61830838
+#  |_corresponding dict-config,
+#    https://stackoverflow.com/questions/7507825/where-is-a-complete-example-of-logging-config-dictconfig/7507842#7507842
+#  - [ ] what's the benefit/tradeoffs?
+#
 class StackLevelAdapter(LoggerAdapter):
+    '''
+    A (software) stack oriented logger "adapter".
 
+    '''
     def at_least_level(
         self,
         level: str,
@@ -284,7 +307,9 @@ class ActorContextInfo(Mapping):
 
 def get_logger(
     name: str|None = None,
-    _root_name: str = _proj_name,
+    pkg_name: str = _proj_name,
+    # XXX, deprecated, use ^
+    _root_name: str|None = None,
 
     logger: Logger|None = None,
 
@@ -293,22 +318,89 @@ def get_logger(
     #  |_https://stackoverflow.com/questions/7507825/where-is-a-complete-example-of-logging-config-dictconfig
     #  |_https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema
     subsys_spec: str|None = None,
+    mk_sublog: bool = True,
 
 ) -> StackLevelAdapter:
     '''
     Return the `tractor`-library root logger or a sub-logger for
     `name` if provided.
 
+    When `name` is left null we try to auto-detect the caller's
+    `mod.__name__` and use that as a the sub-logger key.
+    This allows for example creating a module level instance like,
+
+    .. code:: python
+
+        log = tractor.log.get_logger(_root_name='mylib')
+
+    and by default all console record headers will show the caller's
+    (of any `log.<level>()`-method) correct sub-pkg's
+    + py-module-file.
+
     '''
+    if _root_name:
+        msg: str = (
+            'The `_root_name: str` param of `get_logger()` is now deprecated.\n'
+            'Use the new `pkg_name: str` instead, it is the same usage.\n'
+        )
+        warnings.warn(
+            msg,
+            DeprecationWarning,
+            stacklevel=2,
+        )
+    pkg_name: str = _root_name or pkg_name
     log: Logger
-    log = rlog = logger or logging.getLogger(_root_name)
+    log = rlog = logger or logging.getLogger(pkg_name)
+
+    # Implicitly introspect the caller's module-name whenever `name`
+    # if left as the null default.
+    #
+    # When the `pkg_name` is `in` in the `mod.__name__` we presume
+    # this instance can be created as a sub-`StackLevelAdapter` and
+    # that the intention is get free module-path tracing and
+    # filtering (well once we implement that) oriented around the
+    # py-module code hierarchy of the consuming project.
+    if (
+        pkg_name != _proj_name
+        and
+        name is None
+        and
+        mk_sublog
+    ):
+        callstack: list[FrameInfo] = stack()
+        caller_fi: FrameInfo = callstack[1]
+        caller_mod: ModuleType = getmodule(caller_fi.frame)
+        if caller_mod:
+            # ?how is this `mod.__name__` defined?
+            # -> well by how the mod is imported..
+            # |_https://stackoverflow.com/a/15883682
+            mod_name: str = caller_mod.__name__
+            mod_pkg: str = caller_mod.__package__
+            log.info(
+                f'Generating sub-logger name,\n'
+                f'{mod_pkg}.{mod_name}\n'
+            )
+            # if pkg_name in caller_mod.__package__:
+            #     from tractor.devx.debug import mk_pdb
+            #     mk_pdb().set_trace()
+
+            if (
+                pkg_name
+                # and
+                # pkg_name in mod_name
+            ):
+                name = mod_name
+
+    # XXX, lowlevel debuggin..
+    # if pkg_name != _proj_name:
+        # from tractor.devx.debug import mk_pdb
+        # mk_pdb().set_trace()
 
     if (
-        name
-        and
         name != _proj_name
+        and
+        name
     ):
-
         # NOTE: for handling for modules that use `get_logger(__name__)`
         # we make the following stylistic choice:
         # - always avoid duplicate project-package token
@@ -318,24 +410,63 @@ def get_logger(
         #   since in python the {filename} is always this same
         #   module-file.
 
-        sub_name: None|str = None
-        rname, _, sub_name = name.partition('.')
-        pkgpath, _, modfilename = sub_name.rpartition('.')
+        rname: str = pkg_name
+        pkg_path: str = name
 
-        # NOTE: for tractor itself never include the last level
-        # module key in the name such that something like: eg.
-        # 'tractor.trionics._broadcast` only includes the first
-        # 2 tokens in the (coloured) name part.
-        if rname == 'tractor':
-            sub_name = pkgpath
+        # ex. modden.runtime.progman
+        # -> rname='modden', _, pkg_path='runtime.progman'
+        if pkg_name in name:
+            rname, _, pkg_path = name.partition('.')
 
-        if _root_name in sub_name:
-            duplicate, _, sub_name = sub_name.partition('.')
+        # ex. modden.runtime.progman
+        # -> pkgpath='runtime', _, leaf_mod='progman'
+        subpkg_path, _, leaf_mod = pkg_path.rpartition('.')
 
-        if not sub_name:
+        # NOTE: special usage for passing `name=__name__`,
+        #
+        # - remove duplication of any root-pkg-name in the
+        #   (sub/child-)logger name; i.e. never include the
+        #   `pkg_name` *twice* in the top-most-pkg-name/level
+        #
+        # -> this happens normally since it is added to `.getChild()`
+        #   and as the name of its root-logger.
+        #
+        # => So for ex. (module key in the name) something like
+        #   `name='tractor.trionics._broadcast` is passed,
+        #   only includes the first 2 sub-pkg name-tokens in the
+        #   child-logger's name; the colored "pkg-namespace" header
+        #   will then correctly show the same value as `name`.
+        if rname == pkg_name:
+            pkg_path = subpkg_path
+
+        # XXX, do some double-checks for duplication of,
+        # - root-pkg-name, already in root logger
+        # - leaf-module-name already in `{filename}` header-field
+        if pkg_name in pkg_path:
+            _duplicate, _, pkg_path = pkg_path.partition('.')
+            if _duplicate:
+                # assert _duplicate == rname
+                _root_log.warning(
+                    f'Duplicate pkg-name in sub-logger key?\n'
+                    f'pkg_name = {pkg_name!r}\n'
+                    f'pkg_path = {pkg_path!r}\n'
+                )
+
+        if (
+            leaf_mod
+            and
+            leaf_mod in pkg_path
+        ):
+            _root_log.warning(
+                f'Duplicate leaf-module-name in sub-logger key?\n'
+                f'leaf_mod = {leaf_mod!r}\n'
+                f'pkg_path = {pkg_path!r}\n'
+            )
+
+        if not pkg_path:
             log = rlog
-        else:
-            log = rlog.getChild(sub_name)
+        elif mk_sublog:
+            log = rlog.getChild(pkg_path)
 
         log.level = rlog.level
 
@@ -350,8 +481,13 @@ def get_logger(
     for name, val in CUSTOM_LEVELS.items():
         logging.addLevelName(val, name)
 
-        # ensure customs levels exist as methods
-        assert getattr(logger, name.lower()), f'Logger does not define {name}'
+        # ensure our custom adapter levels exist as methods
+        assert getattr(
+            logger,
+            name.lower()
+        ), (
+            f'Logger does not define {name}'
+        )
 
     return logger
 
@@ -425,4 +561,4 @@ def get_loglevel() -> str:
 
 
 # global module logger for tractor itself
-log: StackLevelAdapter = get_logger('tractor')
+_root_log: StackLevelAdapter = get_logger('tractor')

tractor/msg/_ops.py

@@ -613,10 +613,9 @@ async def drain_to_final_msg(
             #       msg: dict = await ctx._rx_chan.receive()
             #   if res_cs.cancelled_caught:
             #
-            # -[ ] make sure pause points work here for REPLing
+            # -[x] make sure pause points work here for REPLing
             #   the runtime itself; i.e. ensure there's no hangs!
-            # |_from tractor.devx.debug import pause
-            #   await pause()
+            #  |_see masked code below in .cancel_called path
 
         # NOTE: we get here if the far end was
         # `ContextCancelled` in 2 cases:
@@ -652,6 +651,10 @@ async def drain_to_final_msg(
                     f'IPC ctx cancelled externally during result drain ?\n'
                     f'{ctx}'
                 )
+                # XXX, for tracing `Cancelled`..
+                # from tractor.devx.debug import pause
+                # await pause(shield=True)
+
             # CASE 2: mask the local cancelled-error(s)
             # only when we are sure the remote error is
             # the source cause of this local task's

tractor/to_asyncio.py

@@ -337,9 +337,12 @@ def _run_asyncio_task(
 
     '''
     __tracebackhide__: bool = hide_tb
-    if not tractor.current_actor().is_infected_aio():
+    if not (actor := tractor.current_actor()).is_infected_aio():
         raise RuntimeError(
-            "`infect_asyncio` mode is not enabled!?"
+            f'`infect_asyncio: bool` mode is not enabled ??\n'
+            f'Ensure you pass `ActorNursery.start_actor(infect_asyncio=True)`\n'
+            f'\n'
+            f'{actor}\n'
         )
 
     # ITC (inter task comms), these channel/queue names are mostly from

tractor/trionics/_taskc.py

@@ -72,7 +72,7 @@ _mask_cases: dict[
     dict[
         int,  # inner-frame index into `inspect.getinnerframes()`
         # `FrameInfo.function/filename: str`s to match
-        tuple[str, str],
+        dict[str, str],
     ],
 ] = {
     trio.WouldBlock: {
@@ -163,6 +163,7 @@ async def maybe_raise_from_masking_exc(
     # ^XXX, special case(s) where we warn-log bc likely
     # there will be no operational diff since the exc
     # is always expected to be consumed.
+
 ) -> BoxedMaybeException:
     '''
     Maybe un-mask and re-raise exception(s) suppressed by a known
@@ -263,6 +264,8 @@ async def maybe_raise_from_masking_exc(
                 if len(masked) < 2:
                     # don't unmask already known "special" cases..
                     if (
+                        _mask_cases
+                        and
                         (cases := _mask_cases.get(type(exc_ctx)))
                         and
                         (masker_frame := is_expected_masking_case(
@@ -272,7 +275,8 @@ async def maybe_raise_from_masking_exc(
                         ))
                     ):
                         log.warning(
-                            f'Ignoring already-known/non-ideally-valid masker code @\n'
+                            f'Ignoring already-known, non-ideal-but-valid '
+                            f'masker code @\n'
                             f'{masker_frame}\n'
                             f'\n'
                             f'NOT raising {exc_ctx} from masker {exc_match!r}\n'