def do_mutator_plugin():
"""Return whether or not to use a mutator_plugin."""
# TODO(metzman): Support Windows.
if environment.platform() == 'WINDOWS':
return False
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.MUTATOR_PLUGIN_STRATEGY, default=MUTATOR_PLUGIN_PROBABILITY))
def choose_generator(strategy_pool):
"""Chooses whether to use radamsa, ml rnn, or no generator and updates the
strategy pool."""
radamsa_prob = engine_common.get_strategy_probability(
strategy.CORPUS_MUTATION_RADAMSA_STRATEGY.name,
default=strategy.CORPUS_MUTATION_RADAMSA_STRATEGY.probability)
ml_rnn_prob = engine_common.get_strategy_probability(
strategy.CORPUS_MUTATION_ML_RNN_STRATEGY.name,
default=strategy.CORPUS_MUTATION_ML_RNN_STRATEGY.probability)
if engine_common.decide_with_probability(radamsa_prob + ml_rnn_prob):
if engine_common.decide_with_probability(
radamsa_prob / (radamsa_prob + ml_rnn_prob)):
strategy_pool.add_strategy(strategy.CORPUS_MUTATION_RADAMSA_STRATEGY)
else:
strategy_pool.add_strategy(strategy.CORPUS_MUTATION_ML_RNN_STRATEGY)
def do_fork():
"""Return whether or not to do fork mode."""
# TODO(metzman): Find a workaround for Windows command line limit before
# re-enabling this.
if environment.platform() == 'WINDOWS':
return False
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.FORK_STRATEGY, default=FORK_PROBABILITY))
def do_fork():
"""Return whether or not to do fork mode."""
# TODO(crbug.com/920355): Reenable this when fork mode works with ChromeOS's
# MSAN.
job_name = environment.get_value('JOB_NAME')
memory_tool = environment.get_memory_tool_name(job_name)
if memory_tool == 'MSAN' and environment.is_chromeos_system_job():
return False
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(strategy.FORK_STRATEGY,
default=FORK_PROBABILITY))
def do_fork():
"""Return whether or not to do fork mode."""
# TODO(metzman): Find a workaround for Windows command line limit before
# re-enabling this.
if environment.platform() == 'WINDOWS':
return False
# TODO(crbug.com/920355): Reenable this when fork mode works with ChromeOS's
# MSAN.
job_name = environment.get_value('JOB_NAME')
memory_tool = environment.get_memory_tool_name(job_name)
if memory_tool == 'MSAN' and environment.is_chromeos_system_job():
return False
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(strategy.FORK_STRATEGY,
default=FORK_PROBABILITY))
def decide_fast_cal_random(self, num_files):
"""Decides whether to use AFL_FAST_CAL, based on probabilities that are
dependant on |num_files| (listed in FAST_CAL_PROBS), sets self.fast_cal
to FastCal.RANDOM if we decide yes, or sets it to FastCal.OFF. Does nothing
if use_fast_cal was already set. Idempotent.
"""
# Don't do anything if we have already made a decision about randomly using
# fast_cal.
if self.fast_cal != strategies.FastCal.NOT_SET:
return
# Decide if we want to use it.
for cutoff, prob in self.FAST_CAL_PROBS:
# Find the correct probability based on the number of input files.
if num_files <= cutoff:
if engine_common.decide_with_probability(prob):
self.fast_cal = strategies.FastCal.RANDOM
else:
self.fast_cal = strategies.FastCal.OFF
return
assert None, 'This should not be reached'
def do_value_profile():
"""Return whether or not to do value profile."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.VALUE_PROFILE_STRATEGY,
default=VALUE_PROFILE_PROBABILITY))
def do_recommended_dictionary():
"""Retrn whether or not to use the recommended dictionary."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.RECOMMENDED_DICTIONARY_STRATEGY,
default=RECOMMENDED_DICTIONARY_PROBABILITY))
def do_ml_rnn_generator():
"""Return whether or not to do additional mutations."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.CORPUS_MUTATION_ML_RNN_STRATEGY,
default=CORPUS_MUTATION_ML_RNN_PROBABILITY))
def do_radamsa_generator():
"""Return whether or not to do radamsa mutations."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.CORPUS_MUTATION_RADAMSA_STRATEGY,
default=CORPUS_MUTATION_RADAMSA_PROBABILITY))
def do_random_max_length():
"""Return whether or not to do value profile."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(
strategy.RANDOM_MAX_LENGTH_STRATEGY,
default=RANDOM_MAX_LENGTH_PROBABILITY))
def do_strategy(strategy_tuple):
"""Return whether or not to use a given strategy."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(strategy_tuple.name,
strategy_tuple.probability))
def do_fork():
"""Return whether or not to do fork mode."""
return engine_common.decide_with_probability(
engine_common.get_strategy_probability(strategy.FORK_STRATEGY,
default=FORK_PROBABILITY))