def test_kill_removes_trace(self):
from greenlet import gettrace
hub = get_hub()
hub.start_periodic_monitoring_thread()
self.assertIsNotNone(gettrace())
hub.periodic_monitoring_thread.kill()
self.assertIsNone(gettrace())
def test_kill_removes_trace(self):
from greenlet import gettrace
hub = get_hub()
hub.start_periodic_monitoring_thread()
self.assertIsNotNone(gettrace())
hub.periodic_monitoring_thread.kill()
self.assertIsNone(gettrace())
def tearDown(self):
monitor.start_new_thread = self._orig_start_new_thread
monitor.thread_sleep = self._orig_thread_sleep
prev = self.pmt.previous_trace_function
self.pmt.kill()
assert gettrace() is prev, (gettrace(), prev)
settrace(None)
super(_AbstractTestPeriodicMonitoringThread, self).tearDown()
def tearDown(self):
monitor.start_new_thread = self._orig_start_new_thread
monitor.thread_sleep = self._orig_thread_sleep
prev = self.pmt._greenlet_tracer.previous_trace_function
self.pmt.kill()
assert gettrace() is prev, (gettrace(), prev)
settrace(None)
super(_AbstractTestPeriodicMonitoringThread, self).tearDown()
def test_nested(self):
from greenlet import gettrace
with util.assert_switches() as outer:
self.assertEqual(gettrace(), outer.tracer)
self.assertIsNotNone(outer.tracer.active_greenlet)
with util.assert_switches() as inner:
self.assertEqual(gettrace(), inner.tracer)
self.assertEqual(inner.tracer.previous_trace_function, outer.tracer)
inner.tracer('switch', (self, self))
self.assertIs(self, inner.tracer.active_greenlet)
self.assertIs(self, outer.tracer.active_greenlet)
self.assertEqual(gettrace(), outer.tracer)
def test_previous_trace(self):
self.pmt.kill()
self.assertIsNone(gettrace())
called = []
def f(*args):
called.append(args)
settrace(f)
self.pmt = monitor.PeriodicMonitoringThread(self.hub)
self.assertEqual(gettrace(), self.pmt._greenlet_tracer)
self.assertIs(self.pmt._greenlet_tracer.previous_trace_function, f)
self.pmt._greenlet_tracer('event', ('args',))
self.assertEqual([('event', ('args',))], called)
def test_nested(self):
from greenlet import gettrace
with util.assert_switches() as outer:
self.assertEqual(gettrace(), outer.tracer)
self.assertIsNotNone(outer.tracer.active_greenlet)
with util.assert_switches() as inner:
self.assertEqual(gettrace(), inner.tracer)
self.assertEqual(inner.tracer.previous_trace_function,
outer.tracer)
inner.tracer('switch', (self, self))
self.assertIs(self, inner.tracer.active_greenlet)
self.assertIs(self, outer.tracer.active_greenlet)
self.assertEqual(gettrace(), outer.tracer)
def test_previous_trace(self):
self.pmt.kill()
self.assertIsNone(gettrace())
called = []
def f(*args):
called.append(args)
settrace(f)
self.pmt = monitor.PeriodicMonitoringThread(self.hub)
self.assertEqual(gettrace(), self.pmt.greenlet_trace)
self.assertIs(self.pmt.previous_trace_function, f)
self.pmt.greenlet_trace('event', 'args')
self.assertEqual([('event', 'args')], called)
def test_hub_wref(self):
self.assertIs(self.hub, self.pmt.hub)
del self.hub
gc.collect()
self.assertIsNone(self.pmt.hub)
# And it killed itself.
self.assertFalse(self.pmt.should_run)
self.assertIsNone(gettrace())
def test_hub_wref(self):
self.assertIs(self.hub, self.pmt.hub)
del self.hub
gc.collect()
self.assertIsNone(self.pmt.hub)
# And it killed itself.
self.assertFalse(self.pmt.should_run)
self.assertIsNone(gettrace())
def test_b_exception_disables_tracing(self):
main = greenlet.getcurrent()
def dummy():
main.switch()
g = greenlet.greenlet(dummy)
g.switch()
with GreenletTracer(error_on_trace=True) as actions:
self.assertRaises(SomeError, g.switch)
self.assertEqual(greenlet.gettrace(), None)
self.assertEqual(actions, [
('switch', (main, g)),
])
def test_exception_disables_tracing(self):
main = greenlet.getcurrent()
actions = []
def trace(*args):
actions.append(args)
raise SomeError()
def dummy():
main.switch()
g = greenlet.greenlet(dummy)
g.switch()
oldtrace = greenlet.settrace(trace)
try:
self.assertRaises(SomeError, g.switch)
self.assertEqual(greenlet.gettrace(), None)
finally:
greenlet.settrace(oldtrace)
self.assertEqual(actions, [
('switch', (main, g)),
])
def __init__(self, collector, sample_interval=0.1):
self.collector = collector
self.sample_interval = sample_interval
self.last_timestamp = time.time()
# Save the old frame to have proper stack reporting. If the following
# code is executed:
#
# slow() # At this point a new sample is *not* needed
# f2() # When this calls happens a new sample is needed, *because
# # of the previous function*
#
# The above gets worse because a context switch can happen after the
# call to slow, if this is not taken into account a completely wrong
# stack trace will be reported.
self.old_frame = None
self.previous_callback = greenlet.gettrace()
greenlet.settrace(self._greenlet_profiler) # pylint: disable=c-extension-no-member
sys.setprofile(self._thread_profiler)
def install_switch_log():
# Do not overwrite the previous installed tracing function, this could be
# another profiling tool, and if the callback is overwriten the tool would
# not work as expected (e.g. a trace sampler)
previous_callback = greenlet.gettrace()
def log_every_switch(event: str, args: Any) -> None:
if event == "switch":
origin, target = args
# Collecting the complete stack frame because the top-level
# function will be a greenlet, and the bottom function may be an
# external library. To understand what is going on the application
# code, the whole stack is necessary.
frame = sys._getframe(0)
callstack = collect_frames(frame)
# Using `print` because logging will not work here, the logger may
# not be properly initialized on a fresh greenlet and will try to
# use a nullable variable.
print(
json.dumps({
"event": "Switching",
"origin": str(origin),
"target": str(target),
"target_callstack": callstack,
"time": datetime.utcnow().isoformat(),
}))
if previous_callback is not None:
return previous_callback(event, args)
return None
greenlet.settrace(log_every_switch)
return previous_callback
def greenlet_settrace(self):
'Check if any greenlet trace function is registered.'
return bool(greenlet.gettrace())
def greenlet_settrace(self):
'Check if any greenlet trace function is registered.'
return bool(greenlet.gettrace())
def execute(self):
self.log.debug('Executing {}'.format(self.graph))
# Initialize graph
if self.graph.state == ComponentState.NOT_INITIALIZED:
self.graph.initialize()
self.graph.state = ComponentState.INITIALIZED
# Enable tracing
old_trace = greenlet.gettrace()
if self.DETECT_BLOCKING:
greenlet.settrace(self._blocking_greenlet_detector)
self._running = True
try:
all_components = set()
self._graph_lookup = {}
for component, graph in self.graph.get_all_components(
include_graphs=True):
self._graph_lookup[component] = graph
all_components.add(component)
component.executor = self
# Component should always be in a INITIALIZED state when first
# running!
if component.state != ComponentState.INITIALIZED:
raise exc.ComponentStateError(
component,
'state is {}, but expected INITIALIZED'.format(
component.state))
component.state = ComponentState.ACTIVE
self.log.debug('Components in {}: {}'.format(
self.graph, ', '.join(map(str, all_components))))
self._recv_queues = collections.defaultdict(queue.Queue)
self._coroutines = dict([
(
gevent.spawn(
self._create_component_runner(comp),
None, # in_queues
None), # out_queues
comp) for comp in filter(
lambda c: not isinstance(c, Graph), all_components)
])
last_exception = None
def thread_error_handler(coroutine):
"""
Handles component coroutine exceptions that get raised.
This should terminate execution of all other coroutines.
"""
last_exception = coroutine.exception
component = self._coroutines[coroutine]
self.log.error('Component "{}" failed with {}: {}'.format(
component.name, coroutine.exception.__class__.__name__,
coroutine.exception.message))
for c in all_components:
if c.is_alive():
c.terminate(ex=last_exception)
# Wire up error handler (so that exceptions aren't swallowed)
for coroutine in self._coroutines.keys():
coroutine.link_exception(thread_error_handler)
# Wait for all coroutines to terminate
gevent.wait(self._coroutines.keys())
self.graph.terminate(ex=last_exception)
self._final_checks()
self._reset_components()
self.log.debug('Finished graph execution')
finally:
self._running = False
if self.DETECT_BLOCKING:
# Unset tracer
greenlet.settrace(old_trace)
def test_constructor(self):
self.assertEqual(0xDEADBEEF, self.pmt.monitor_thread_ident)
self.assertEqual(gettrace(), self.pmt._greenlet_tracer)
def execute(self):
self.log.debug("Executing {}".format(self.graph))
# Initialize graph
if self.graph.state == ComponentState.NOT_INITIALIZED:
self.graph.initialize()
self.graph.state = ComponentState.INITIALIZED
# Enable tracing
old_trace = greenlet.gettrace()
if self.DETECT_BLOCKING:
greenlet.settrace(self._blocking_greenlet_detector)
self._running = True
try:
all_components = set()
self._graph_lookup = {}
for component, graph in self.graph.get_all_components(include_graphs=True):
self._graph_lookup[component] = graph
all_components.add(component)
component.executor = self
# Component should always be in a INITIALIZED state when first
# running!
if component.state != ComponentState.INITIALIZED:
raise exc.ComponentStateError(
component, "state is {}, but expected INITIALIZED".format(component.state)
)
component.state = ComponentState.ACTIVE
self.log.debug("Components in {}: {}".format(self.graph, ", ".join(map(str, all_components))))
self._recv_queues = collections.defaultdict(queue.Queue)
self._coroutines = dict(
[
(gevent.spawn(self._create_component_runner(comp), None, None), comp) # in_queues # out_queues
for comp in filter(lambda c: not isinstance(c, Graph), all_components)
]
)
last_exception = None
def thread_error_handler(coroutine):
"""
Handles component coroutine exceptions that get raised.
This should terminate execution of all other coroutines.
"""
last_exception = coroutine.exception
component = self._coroutines[coroutine]
self.log.error(
'Component "{}" failed with {}: {}'.format(
component.name, coroutine.exception.__class__.__name__, coroutine.exception.message
)
)
for c in all_components:
if c.is_alive():
c.terminate(ex=last_exception)
# Wire up error handler (so that exceptions aren't swallowed)
for coroutine in self._coroutines.keys():
coroutine.link_exception(thread_error_handler)
# Wait for all coroutines to terminate
gevent.wait(self._coroutines.keys())
self.graph.terminate(ex=last_exception)
self._final_checks()
self._reset_components()
self.log.debug("Finished graph execution")
finally:
self._running = False
if self.DETECT_BLOCKING:
# Unset tracer
greenlet.settrace(old_trace)
def test_constructor(self):
self.assertEqual(0xDEADBEEF, self.pmt.monitor_thread_ident)
self.assertEqual(gettrace(), self.pmt.greenlet_trace)
def _check():
# 任务监控
greenlet.settrace(lambda: 2)
greenlet.gettrace()
