def test_depth_limit(LineMatcher, depth):
buff = StringIO()
from sample7 import one
tracer = hunter.Tracer()
predicate = When(Q(depth_lt=depth), CallPrinter(stream=buff))
try:
tracer.trace(predicate)
one()
finally:
tracer.stop()
output = buff.getvalue()
lm = LineMatcher(output.splitlines())
lm.fnmatch_lines([
"* call => one()",
"* line for i in range(1): # one",
"* line two()",
"* call => two()",
"* return <= two: None",
"* line for i in range(1): # one",
"* return <= one: None",
])
if depth < 3:
assert 'three' not in output
if depth < 4:
assert 'four' not in output
if depth < 5:
assert 'five' not in output
def tracing_wrapper(*args, **kwargs):
# create the Tracer manually to avoid spending time in likely useless things like:
# - loading PYTHONHUNTERCONFIG
# - setting up the clear_env_var or thread_support options
# - atexit cleanup registration
with hunter.Tracer().trace(
hunter.When(hunter.Query(**filters), *actions)):
return func(*args, **kwargs)
def mockevent():
return hunter.Event(sys._getframe(0), 'line', None, hunter.Tracer())
def probe_wrapper(*args, **kwargs):
now = datetime.datetime.utcnow()
hotspots = HotspotsFinder()
instruments_by_event = {"call": [], "return": [], "end": []}
for I in self.instruments.itervalues():
if I.expires and now > I.expires:
continue
if I.check_call(self, *args, **kwargs):
instruments_by_event[I.event].append(I)
if I.event in ("call", "return"):
if "hotspots" in I.value or "hotspots" in (
I.custom.get("tags") or ""
):
hotspots.enabled = True
target_obj, target_func_name = self.target.rsplit(".", 1)
is_unwrapped = base.__code__.co_name == target_func_name
if instruments_by_event["end"]:
# We have instruments that require evaluation in the local
# context of the function. Call sys.settrace() to gain access.
predicate = hunter.When(
hunter.Query(
# Only trace returns (this will include exceptions!)...
kind="return",
# ...and only in the given function...
function=target_func_name,
# ...(no deeper).
depth=0,
)
if is_unwrapped
else hunter.Query(
# Only trace returns (this will include exceptions!)...
kind="return",
# ...and only in the given function...
function=target_func_name,
# ...but we don't know how many times it's been wrapped.
# Use the module instead as an approximate match.
# This may catch other functions with the same name
# in the same module, but not much we can do about
# that without a custom Cython Query.
module_in=target_obj,
),
TraceHandler(self, instruments_by_event["end"]),
)
tracer = hunter.Tracer(
# There's no need to call threading.settrace() because
# a) we're targeting a function we're about to call
# in the same thread,
# b) we're going to undo it immediately after, and
# c) it would collide with other threads if they did
# the same concurrently.
threading_support=False
).trace(predicate)
elif hotspots.enabled:
# We have instruments that require timing internal lines.
# Call sys.settrace() to gain access.
predicate = hunter.When(
hunter.Query(
# Only trace lines...
kind="line",
# ...and only in the given function...
function=target_func_name,
# ...(no deeper).
depth=1,
)
if is_unwrapped
else hunter.Query(
# Only trace lines...
kind="line",
# ...and only in the given function...
function=target_func_name,
# ...but we don't know how many times it's been wrapped.
# Use the module instead as an approximate match.
# This may catch other functions with the same name
# in the same module, but not much we can do about
# that without a custom Cython Query.
module_in=target_obj,
),
hotspots,
)
tracer = hunter.Tracer(
# There's no need to call threading.settrace() because
# a) we're targeting a function we're about to call
# in the same thread,
# b) we're going to undo it immediately after, and
# c) it would collide with other threads if they did
# the same concurrently.
threading_support=False
).trace(predicate)
else:
tracer = None
try:
if instruments_by_event["call"] or instruments_by_event["return"]:
start = time.time()
_locals = {
"start": start,
"now": now,
"args": args,
"kwargs": kwargs,
"frame": sys._getframe(),
}
# Add positional args to locals by name.
for i, argname in enumerate(varnames[: len(args)]):
if argname not in ("args", "kwargs"):
_locals[argname] = args[i]
# Add kwargs to locals
_locals.update(kwargs)
for instrument in instruments_by_event["call"]:
try:
instrument.fire(instrument.mgr.global_namespace, _locals)
except:
try:
instrument.handle_error(self)
except:
traceback.print_exc()
# Execute the base function and obtain its result.
try:
result = base(*args, **kwargs)
except:
result = sys.exc_info()[1]
raise
finally:
if hotspots.enabled:
hotspots.finish()
_locals["hotspots"] = hotspots
if instruments_by_event["return"]:
end = time.time()
elapsed = end - start
_locals.update(
{"result": result, "end": end, "elapsed": elapsed}
)
for instrument in instruments_by_event["return"]:
try:
instrument.fire(instrument.mgr.global_namespace, _locals)
except:
try:
instrument.handle_error(self)
except:
traceback.print_exc()
return result
finally:
if tracer is not None:
tracer.stop()
def mockevent():
return hunter.Event(sys._getframe(0),
2 if '_event' in hunter.Event.__module__ else 'line',
None, hunter.Tracer())