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#!/usr/bin/env python
import sys
import shutil
import os
import select
import unittest
import argparse
import time
from multiprocessing import Process, Pipe
from framework import VppTestRunner
from debug import spawn_gdb
from log import global_logger
from discover_tests import discover_tests
from subprocess import check_output, CalledProcessError
from util import check_core_path
# timeout which controls how long the child has to finish after seeing
# a core dump in test temporary directory. If this is exceeded, parent assumes
# that child process is stuck (e.g. waiting for shm mutex, which will never
# get unlocked) and kill the child
core_timeout = 3
def test_runner_wrapper(suite, keep_alive_pipe, result_pipe, failed_pipe):
result = not VppTestRunner(
keep_alive_pipe=keep_alive_pipe,
failed_pipe=failed_pipe,
verbosity=verbose,
failfast=failfast).run(suite).wasSuccessful()
result_pipe.send(result)
result_pipe.close()
keep_alive_pipe.close()
failed_pipe.close()
class add_to_suite_callback:
def __init__(self, suite):
self.suite = suite
def __call__(self, file_name, cls, method):
suite.addTest(cls(method))
class Filter_by_class_list:
def __init__(self, class_list):
self.class_list = class_list
def __call__(self, file_name, class_name, func_name):
return class_name in self.class_list
def suite_from_failed(suite, failed):
filter_cb = Filter_by_class_list(failed)
suite = VppTestRunner.filter_tests(suite, filter_cb)
if 0 == suite.countTestCases():
raise Exception("Suite is empty after filtering out the failed tests!")
return suite
def run_forked(suite):
keep_alive_parent_end, keep_alive_child_end = Pipe(duplex=False)
result_parent_end, result_child_end = Pipe(duplex=False)
failed_parent_end, failed_child_end = Pipe(duplex=False)
child = Process(target=test_runner_wrapper,
args=(suite, keep_alive_child_end, result_child_end,
failed_child_end))
child.start()
last_test_temp_dir = None
last_test_vpp_binary = None
last_test = None
result = None
failed = set()
last_heard = time.time()
core_detected_at = None
debug_core = os.getenv("DEBUG", "").lower() == "core"
while True:
readable = select.select([keep_alive_parent_end.fileno(),
result_parent_end.fileno(),
failed_parent_end.fileno(),
],
[], [], 1)[0]
if result_parent_end.fileno() in readable:
result = result_parent_end.recv()
break
if keep_alive_parent_end.fileno() in readable:
while keep_alive_parent_end.poll():
last_test, last_test_vpp_binary,\
last_test_temp_dir, vpp_pid = keep_alive_parent_end.recv()
last_heard = time.time()
if failed_parent_end.fileno() in readable:
while failed_parent_end.poll():
failed_test = failed_parent_end.recv()
failed.add(failed_test.__name__)
last_heard = time.time()
fail = False
if last_heard + test_timeout < time.time() and \
not os.path.isfile("%s/_core_handled" % last_test_temp_dir):
fail = True
global_logger.critical("Timeout while waiting for child test "
"runner process (last test running was "
"`%s' in `%s')!" %
(last_test, last_test_temp_dir))
elif not child.is_alive():
fail = True
global_logger.critical("Child python process unexpectedly died "
"(last test running was `%s' in `%s')!" %
(last_test, last_test_temp_dir))
elif last_test_temp_dir and last_test_vpp_binary:
core_path = "%s/core" % last_test_temp_dir
if os.path.isfile(core_path):
if core_detected_at is None:
core_detected_at = time.time()
elif core_detected_at + core_timeout < time.time():
if not os.path.isfile(
"%s/_core_handled" % last_test_temp_dir):
global_logger.critical(
"Child python process unresponsive and core-file "
"exists in test temporary directory!")
fail = True
if fail:
failed_dir = os.getenv('VPP_TEST_FAILED_DIR')
lttd = last_test_temp_dir.split("/")[-1]
link_path = '%s%s-FAILED' % (failed_dir, lttd)
global_logger.error("Creating a link to the failed " +
"test: %s -> %s" % (link_path, lttd))
try:
os.symlink(last_test_temp_dir, link_path)
except Exception:
pass
api_post_mortem_path = "/tmp/api_post_mortem.%d" % vpp_pid
if os.path.isfile(api_post_mortem_path):
global_logger.error("Copying api_post_mortem.%d to %s" %
(vpp_pid, last_test_temp_dir))
shutil.copy2(api_post_mortem_path, last_test_temp_dir)
if last_test_temp_dir and last_test_vpp_binary:
core_path = "%s/core" % last_test_temp_dir
if os.path.isfile(core_path):
global_logger.error("Core-file exists in test temporary "
"directory: %s!" % core_path)
check_core_path(global_logger, core_path)
global_logger.debug("Running `file %s':" % core_path)
try:
info = check_output(["file", core_path])
global_logger.debug(info)
except CalledProcessError as e:
global_logger.error(
"Could not run `file' utility on core-file, "
"rc=%s" % e.returncode)
pass
if debug_core:
spawn_gdb(last_test_vpp_binary, core_path,
global_logger)
child.terminate()
result = -1
break
keep_alive_parent_end.close()
result_parent_end.close()
failed_parent_end.close()
return result, failed
if __name__ == '__main__':
try:
verbose = int(os.getenv("V", 0))
except ValueError:
verbose = 0
default_test_timeout = 600 # 10 minutes
try:
test_timeout = int(os.getenv("TIMEOUT", default_test_timeout))
except ValueError:
test_timeout = default_test_timeout
debug = os.getenv("DEBUG")
s = os.getenv("STEP", "n")
step = True if s.lower() in ("y", "yes", "1") else False
parser = argparse.ArgumentParser(description="VPP unit tests")
parser.add_argument("-f", "--failfast", action='count',
help="fast failure flag")
parser.add_argument("-d", "--dir", action='append', type=str,
help="directory containing test files "
"(may be specified multiple times)")
args = parser.parse_args()
failfast = True if args.failfast == 1 else False
suite = unittest.TestSuite()
cb = add_to_suite_callback(suite)
for d in args.dir:
print("Adding tests from directory tree %s" % d)
discover_tests(d, cb)
try:
retries = int(os.getenv("RETRIES", 0))
except ValueError:
retries = 0
try:
force_foreground = int(os.getenv("FORCE_FOREGROUND", 0))
except ValueError:
force_foreground = 0
attempts = retries + 1
if attempts > 1:
print("Perform %s attempts to pass the suite..." % attempts)
if (debug is not None and debug.lower() in ["gdb", "gdbserver"]) or step\
or force_foreground:
# don't fork if requiring interactive terminal..
sys.exit(not VppTestRunner(
verbosity=verbose, failfast=failfast).run(suite).wasSuccessful())
else:
while True:
result, failed = run_forked(suite)
attempts = attempts - 1
print("%s test(s) failed, %s attempt(s) left" %
(len(failed), attempts))
if len(failed) > 0 and attempts > 0:
suite = suite_from_failed(suite, failed)
continue
sys.exit(result)
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