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GH-91048: Add utils for capturing async call stack for asyncio programs and enable profiling (#124640)

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Signed-off-by: Pablo Galindo <pablogsal@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Savannah Ostrowski <savannahostrowski@gmail.com>
Co-authored-by: Jacob Coffee <jacob@z7x.org>
Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
This commit is contained in:
Yury Selivanov 2025-01-22 08:25:29 -08:00 • committed by GitHub
parent 60a3a0dd6f
commit 188598851d
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GPG key ID: B5690EEEBB952194
23 changed files with 2923 additions and 241 deletions
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30
Lib/asyncio/tasks.py
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@ -322,6 +322,7 @@ class Task(futures._PyFuture): # Inherit Python Task implementation
self._loop.call_soon(
self.__step, new_exc, context=self._context)
else:
futures.future_add_to_awaited_by(result, self)
result._asyncio_future_blocking = False
result.add_done_callback(
self.__wakeup, context=self._context)
@ -356,6 +357,7 @@ class Task(futures._PyFuture): # Inherit Python Task implementation
self = None # Needed to break cycles when an exception occurs.
def __wakeup(self, future):
futures.future_discard_from_awaited_by(future, self)
try:
future.result()
except BaseException as exc:
@ -502,6 +504,7 @@ async def _wait(fs, timeout, return_when, loop):
if timeout is not None:
timeout_handle = loop.call_later(timeout, _release_waiter, waiter)
counter = len(fs)
cur_task = current_task()
def _on_completion(f):
nonlocal counter
@ -514,9 +517,11 @@ async def _wait(fs, timeout, return_when, loop):
timeout_handle.cancel()
if not waiter.done():
waiter.set_result(None)
futures.future_discard_from_awaited_by(f, cur_task)
for f in fs:
f.add_done_callback(_on_completion)
futures.future_add_to_awaited_by(f, cur_task)
try:
await waiter
@ -802,10 +807,19 @@ def gather(*coros_or_futures, return_exceptions=False):
outer.set_result([])
return outer
def _done_callback(fut):
loop = events._get_running_loop()
if loop is not None:
cur_task = current_task(loop)
else:
cur_task = None
def _done_callback(fut, cur_task=cur_task):
nonlocal nfinished
nfinished += 1
if cur_task is not None:
futures.future_discard_from_awaited_by(fut, cur_task)
if outer is None or outer.done():
if not fut.cancelled():
# Mark exception retrieved.
@ -862,7 +876,6 @@ def gather(*coros_or_futures, return_exceptions=False):
nfuts = 0
nfinished = 0
done_futs = []
loop = None
outer = None # bpo-46672
for arg in coros_or_futures:
if arg not in arg_to_fut:
@ -875,12 +888,13 @@ def gather(*coros_or_futures, return_exceptions=False):
# can't control it, disable the "destroy pending task"
# warning.
fut._log_destroy_pending = False
nfuts += 1
arg_to_fut[arg] = fut
if fut.done():
done_futs.append(fut)
else:
if cur_task is not None:
futures.future_add_to_awaited_by(fut, cur_task)
fut.add_done_callback(_done_callback)
else:
@ -940,7 +954,15 @@ def shield(arg):
loop = futures._get_loop(inner)
outer = loop.create_future()
def _inner_done_callback(inner):
if loop is not None and (cur_task := current_task(loop)) is not None:
futures.future_add_to_awaited_by(inner, cur_task)
else:
cur_task = None
def _inner_done_callback(inner, cur_task=cur_task):
if cur_task is not None:
futures.future_discard_from_awaited_by(inner, cur_task)
if outer.cancelled():
if not inner.cancelled():
# Mark inner's result as retrieved.