def _kill(self) -> None:
popen = self._popen
if popen is None:
return
if self._killed:
return
self._killed = True
if USE_PROCESS_GROUP:
what = f"{self} process group"
else:
what = f"{self}"
print(f"Kill {what}", file=sys.stderr, flush=True)
try:
if USE_PROCESS_GROUP:
os.killpg(popen.pid, signal.SIGKILL)
else:
popen.kill()
except ProcessLookupError:
# popen.kill(): the process completed, the TestWorkerProcess thread
# read its exit status, but Popen.send_signal() read the returncode
# just before Popen.wait() set returncode.
pass
except OSError as exc:
print_warning(f"Failed to kill {what}: {exc!r}")
def _wait_completed(self) -> None:
popen = self._popen
# stdout and stderr must be closed to ensure that communicate()
# does not hang
popen.stdout.close()
popen.stderr.close()
try:
popen.wait(JOIN_TIMEOUT)
except (subprocess.TimeoutExpired, OSError) as exc:
print_warning(f"Failed to wait for {self} completion "
f"(timeout={format_duration(JOIN_TIMEOUT)}): "
f"{exc!r}")
def _runtest_inner2(ns: Namespace, test_name: str) -> bool:
# Load the test function, run the test function, handle huntrleaks
# and findleaks to detect leaks
abstest = get_abs_module(ns, test_name)
# remove the module from sys.module to reload it if it was already imported
try:
del sys.modules[abstest]
except KeyError:
pass
the_module = importlib.import_module(abstest)
if ns.huntrleaks:
from yp_test.libregrtest.refleak import dash_R
# If the test has a test_main, that will run the appropriate
# tests. If not, use normal unittest test loading.
test_runner = getattr(the_module, "test_main", None)
if test_runner is None:
test_runner = functools.partial(_test_module, the_module)
try:
with save_env(ns, test_name):
if ns.huntrleaks:
# Return True if the test leaked references
refleak = dash_R(ns, test_name, test_runner)
else:
test_runner()
refleak = False
finally:
cleanup_test_droppings(test_name, ns.verbose)
support.gc_collect()
if gc.garbage:
support.environment_altered = True
print_warning(f"{test_name} created {len(gc.garbage)} "
f"uncollectable object(s).")
# move the uncollectable objects somewhere,
# so we don't see them again
FOUND_GARBAGE.extend(gc.garbage)
gc.garbage.clear()
support.reap_children()
return refleak
def getloadavg(self):
if self._popen is None:
return None
returncode = self._popen.poll()
if returncode is not None:
self.close(kill=False)
return None
try:
lines = self._read_lines()
except BrokenPipeError:
self.close()
return None
for line in lines:
line = line.rstrip()
# Ignore the initial header:
# "(PDH-CSV 4.0)","\\\\WIN\\System\\Processor Queue Length"
if 'PDH-CSV' in line:
continue
# Ignore blank lines
if not line:
continue
try:
processor_queue_length = self._parse_line(line)
except ValueError:
print_warning("Failed to parse typeperf output: %a" % line)
continue
# We use an exponentially weighted moving average, imitating the
# load calculation on Unix systems.
# https://en.wikipedia.org/wiki/Load_(computing)#Unix-style_load_calculation
# https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
if self._load is not None:
self._load = (self._load * LOAD_FACTOR_1 +
processor_queue_length * (1.0 - LOAD_FACTOR_1))
elif len(self._values) < NVALUE:
self._values.append(processor_queue_length)
else:
self._load = sum(self._values) / len(self._values)
return self._load
def __exit__(self, exc_type, exc_val, exc_tb):
saved_values = self.saved_values
self.saved_values = None
# Some resources use weak references
support.gc_collect()
for name, get, restore, original in saved_values:
current = get()
# Check for changes to the resource's value
if current != original:
support.environment_altered = True
restore(original)
if not self.quiet and not self.pgo:
print_warning(f"{name} was modified by {self.testname}")
print(f" Before: {original}\n After: {current} ",
file=sys.stderr,
flush=True)
return False
def _process_result(self, item: QueueOutput) -> bool:
"""Returns True if test runner must stop."""
if item[0]:
# Thread got an exception
format_exc = item[1]
print_warning(f"regrtest worker thread failed: {format_exc}")
return True
self.test_index += 1
mp_result = item[1]
self.regrtest.accumulate_result(mp_result.result)
self.display_result(mp_result)
if mp_result.stdout:
print(mp_result.stdout, flush=True)
if mp_result.stderr and not self.ns.pgo:
print(mp_result.stderr, file=sys.stderr, flush=True)
if must_stop(mp_result.result, self.ns):
return True
return False
def wait_stopped(self, start_time: float) -> None:
# bpo-38207: MultiprocessTestRunner.stop_workers() called self.stop()
# which killed the process. Sometimes, killing the process from the
# main thread does not interrupt popen.communicate() in
# TestWorkerProcess thread. This loop with a timeout is a workaround
# for that.
#
# Moreover, if this method fails to join the thread, it is likely
# that Python will hang at exit while calling threading._shutdown()
# which tries again to join the blocked thread. Regrtest.main()
# uses EXIT_TIMEOUT to workaround this second bug.
while True:
# Write a message every second
self.join(1.0)
if not self.is_alive():
break
dt = time.monotonic() - start_time
self.regrtest.log(f"Waiting for {self} thread "
f"for {format_duration(dt)}")
if dt > JOIN_TIMEOUT:
print_warning(
f"Failed to join {self} in {format_duration(dt)}")
break
def cleanup_test_droppings(test_name: str, verbose: int) -> None:
# First kill any dangling references to open files etc.
# This can also issue some ResourceWarnings which would otherwise get
# triggered during the following test run, and possibly produce failures.
support.gc_collect()
# Try to clean up junk commonly left behind. While tests shouldn't leave
# any files or directories behind, when a test fails that can be tedious
# for it to arrange. The consequences can be especially nasty on Windows,
# since if a test leaves a file open, it cannot be deleted by name (while
# there's nothing we can do about that here either, we can display the
# name of the offending test, which is a real help).
for name in (os_helper.TESTFN, ):
if not os.path.exists(name):
continue
if os.path.isdir(name):
import shutil
kind, nuker = "directory", shutil.rmtree
elif os.path.isfile(name):
kind, nuker = "file", os.unlink
else:
raise RuntimeError(f"os.path says {name!r} exists but is neither "
f"directory nor file")
if verbose:
print_warning(f"{test_name} left behind {kind} {name!r}")
support.environment_altered = True
try:
import stat
# fix possible permissions problems that might prevent cleanup
os.chmod(name, stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
nuker(name)
except Exception as exc:
print_warning(f"{test_name} left behind {kind} {name!r} "
f"and it couldn't be removed: {exc}")