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crawl.py
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crawl.py
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#!/usr/bin/env python
import collections, logging
import Queue
import flags
import apptest
import executor
import traceback
import random
logger = logging.getLogger("reproduce")
RESTART_LIMIT = 0.2
TARGET_RESTART_LIMIT = 3
class Step(object):
def __init__(self, state_sig, op, op_desc):
self.state_sig = state_sig
self.op = op
self.op_desc = op_desc
class Target(object):
count = 0
def __init__(self):
self.steps = []
# random crawl
self.priority = random.randrange(100)
def add_step(self, step):
self.steps.append(step)
def get_depth(self):
return len(self.steps)
def get_priority(self):
# Target.count = Target.count + 1
# return Target.count
# BFS
# return self.get_depth()
return self.priority
class Crawler(object):
def __init__(self, batch_number, num_of_operations, launcher):
self.batch_number = batch_number
self.num_of_operations = num_of_operations
self.launcher = launcher
self.states = {}
self.target_queue = Queue.PriorityQueue()
self.cur_steps = []
self.batch_no = -1
self.replay_fail_count = 0
self.target_restart_count = 0
self.curr_target = None
self.restart_count = 0
self.executor = executor.Executor(launcher)
self.executor.setup_err_handler()
def find_state(self, state):
state_sig = self.executor.get_sig(state)
if state_sig in self.states:
return self.states[state_sig]
else:
return None
def target_visited(self, target):
if target.get_depth() == 0:
return False
step = target.steps[-1]
if step.state_sig in self.states:
state_info = self.states[step.state_sig]
if step.op >= len(state_info[2]):
return True
if not state_info[2][step.op]:
state_info[2][step.op] = True
return False
else:
return True
else:
return True
def pick_target(self):
if self.target_queue.qsize() == 0:
return None
(pri, target) = self.target_queue.get()
while self.target_visited(target):
if self.target_queue.qsize() == 0:
return None
(pri, target) = self.target_queue.get();
logger.debug("pick target with priority %d and depth %d" % (pri, target.get_depth()))
return target
def perform_op(self, op):
self.record_op(self.curr_state, self.curr_ops, op)
try:
flags.detect_stop()
apptest.interface.select(op)
except apptest.exception.RemoteException as e:
if "INJECT_EVENT" in e.msg:
pass
else:
raise e
except apptest.exception.InstException as e:
self.executor.err_handler(e)
self.curr_state, self.curr_ops = self.executor.collect()
def select_op(self, state, ops):
if len(ops) == 0:
return None
state_info = self.find_state(self.curr_state)
if state_info is None:
# new state
self.new_state(state, ops, [0])
op = 0
if len(ops) > 1:
logger.debug("new state. added %d states into queue" % (len(ops) - 1))
for i in xrange(1, len(ops)):
self.new_target(state, ops, i)
else:
logger.debug("state already visited.")
op = -1
for i in xrange(len(state_info[2])):
if not state_info[2][i]:
state_info[2][i] = True
op = i
break
if op == -1:
logger.debug("all ops have been done")
return None
return op
def new_state(self, state, ops, done = []):
state_sig = self.executor.get_sig(state)
self.states[state_sig] = (state, ops, [False] * len(ops))
for op in done:
self.states[state_sig][2][op] = True
def new_target(self, state, ops, op):
target = Target()
for step in self.cur_steps:
target.add_step(step)
step = Step(self.executor.get_sig(state), op, ops[op])
target.add_step(step)
self.target_queue.put((target.get_priority(), target))
def record_op(self, state, ops, op):
step = Step(self.executor.get_sig(state), op, ops[op])
self.cur_steps.append(step)
def clear_history(self):
self.cur_steps = []
def crawl(self):
try:
apptest.widget.read_hint(self.launcher.app_apk_path)
except Exception as e:
logger.error("fail to read hints: %r" % e)
return
while self.batch_no + 1 < self.batch_number:
self.batch_no += 1
logger.info("=== execution %d started..." % self.batch_no)
flags.detect_stop()
hit_nothing = False
try:
self.executor.restart()
apptest.interface.disable_checker()
apptest.widget.send_hint(self.launcher.app_package)
self.launcher.notify_external_events()
for op_no in xrange(self.num_of_operations):
try:
flags.detect_stop()
apptest.interface.crawl()
self.launcher.test_all_config()
hit_nothing = False
except apptest.exception.RemoteException as e:
if "INJECT_EVENT" in e.msg:
pass
else:
raise e
except apptest.exception.InstException as e:
self.executor.err_handler(e)
except apptest.exception.ActionFailure as e:
if e.result == 'NothingToDo':
if hit_nothing:
break
else:
hit_nothing = True
self.launcher.dev.execute("input keyevent 4")
apptest.interface.wait_for_idle()
else:
self.executor.err_handler(e)
except apptest.exception.StoppedException:
logger.info("got stop signal. stop")
break
except apptest.exception.ConnectionBroken as e:
if "timeout" in e.message:
raise e
if not self.launcher.dev_running():
raise e
self.executor.err_handler(e)
except apptest.exception.TimeoutException as e:
raise e
except Exception as e:
self.executor.err_handler(e)
logger.info("got exception, check if we should restart")
if not self.launcher.dev_running():
logger.info("should restart!")
raise e
if self.batch_no != self.batch_number - 1:
self.executor.clean_state()
logger.info("=== execution %d finished..." % self.batch_no)
if not self.launcher.dev_running():
raise apptest.exception.InternalError("device not running!")
def resolve_op(self, op, op_desc, curr_ops):
if op < len(curr_ops):
if curr_ops[op] == op_desc:
return op
similar_op = None
for i in xrange(len(curr_ops)):
if curr_ops[i] == op_desc:
return i
if self.executor.similar(op_desc, curr_ops[i]):
similar_op = i
return similar_op
def search(self):
try:
apptest.widget.read_hint(self.launcher.app_apk_path)
except Exception as e:
logger.error("fail to read hints: %r" % e)
return
if self.batch_no == -1:
init_target = Target()
self.target_queue.put((init_target.get_priority(), init_target))
while self.batch_no + 1 < self.batch_number:
self.batch_no += 1
logger.info("=== execution %d started..." % self.batch_no)
flags.detect_stop()
if self.curr_target is not None:
self.target_restart_count += 1
if self.target_restart_count > TARGET_RESTART_LIMIT:
self.curr_target = None
self.target_restart_count = 0
if self.curr_target is None:
target = self.pick_target()
else:
target = self.curr_target
if target is None:
logger.info("=== state queue empty. finish. ===")
break
self.clear_history()
try:
self.executor.restart()
apptest.interface.disable_checker()
apptest.widget.send_hint(self.launcher.app_package)
self.launcher.notify_external_events()
self.curr_state, self.curr_ops = self.executor.collect()
branched = False
logger.info("replay start")
for step in target.steps:
# if self.executor.state_match(self.curr_state, step.state_sig) and step.op < len(self.curr_ops):
# logger.debug("replay op %r: %s" % (step.op, step.op_desc))
# self.perform_op(step.op)
realop = self.resolve_op(step.op, step.op_desc, self.curr_ops)
if realop is not None:
self.perform_op(realop)
else:
# replay failed!
# state branch!
logger.error("replay failed. fallback to exploration.")
self.replay_fail_count += 1
branched = True
break
if not branched:
logger.info("replay finished. start exploration")
for op_no in xrange(self.num_of_operations):
op = self.select_op(self.curr_state, self.curr_ops)
if op is None:
logger.info("nothing to do.")
break
logger.debug("selected op %r: %s" % (op, self.curr_ops[op]))
self.perform_op(op)
except apptest.exception.ConnectionBroken as e:
logger.info("connection broken: %r" % e)
if "timeout" in e.message:
raise e
self.executor.err_handler(e)
if not self.launcher.dev_running():
raise e
except apptest.exception.StoppedException as e:
raise e
except Exception as e:
logger.error("unknown exception: %r" % e)
traceback.print_exc()
self.executor.err_handler(e)
if not self.launcher.dev_running():
raise e
if self.batch_no != self.batch_number - 1:
self.executor.clean_state()
logger.info("=== execution %d finished..." % self.batch_no)
logger.info("=== state count: %5d" % len(self.states))
logger.info("=== queue len: %5d" % self.target_queue.qsize())
logger.info("=== op count: %5d" % len(self.cur_steps))
logger.info("=== replay fail: %5d" % self.replay_fail_count)
# if self.target_queue:
# logger.info("=== first target depth: %5d" % self.target_queue[0].get_depth())
if not self.launcher.dev_running():
raise apptest.exception.InternalError("device not running!")
self.curr_target = None
def should_restart(self):
self.restart_count += 1
if self.restart_count > RESTART_LIMIT * self.batch_number:
return False
return self.batch_no + 1 < self.batch_number