Remove dead fuzzer code (#4152)

Author: jonathanmetzman

src/clusterfuzz/_internal/bot/fuzzers/afl/constants.py

@@ -64,8 +64,6 @@
 CMPLOG_RAND = 'R'
 
 # AFL environment variables.
-MAP_SIZE_ENV_VAR = 'AFL_MAP_SIZE'
-
 IGNORE_UNKNOWN_ENVS_ENV_VAR = 'AFL_IGNORE_UNKNOWN_ENVS'
 
 SKIP_CRASHES_ENV_VAR = 'AFL_SKIP_CRASHES'

src/clusterfuzz/_internal/bot/fuzzers/afl/launcher.py

@@ -400,12 +400,6 @@ class AflFuzzInputDirectory:
   afl-fuzz as the -i argument.
   """
 
-  # If the number of input files is less than this, don't bother skipping
-  # deterministic steps since it won't take long.
-  MIN_INPUTS_FOR_SKIP = 10
-
-  MAX_COPIED_CORPUS_SIZE = 2**30  # 1 GB
-
   def __init__(self, input_directory, target_path, fuzzing_strategies):
     """Inits AflFuzzInputDirectory.
 
@@ -671,13 +665,6 @@ def set_arg(cls, afl_args, flag, value):
 
     return afl_args
 
-  @classmethod
-  def remove_arg(cls, afl_args, flag):
-    idx = cls.get_arg_index(afl_args, flag)
-    if idx == -1:
-      return
-    del afl_args[idx]
-
   @classmethod
   def set_input_arg(cls, afl_args, new_input_value):
     """Changes the input argument (-i) in |afl_args| to |new_input_value|."""

src/clusterfuzz/_internal/bot/fuzzers/afl/strategies.py

@@ -39,7 +39,6 @@
 EXTRA_BINARIES_FLAGNAME = 'extra_binaries'
 EXIT_ON_CRASH_FLAGNAME = 'exit_on_crash'
 
-TIMEOUT_PER_INPUT_REPR = 60
 NUM_RUNS_PER_MINIMIZATION = 100000
 
 

src/clusterfuzz/_internal/bot/fuzzers/centipede/constants.py

@@ -506,23 +506,6 @@ def recreate_directory(directory_path):
     raise OSError('Failed to recreate directory: ' + directory_path)
 
 
-def strip_minijail_command(command, fuzzer_path):
-  """Remove minijail arguments from a fuzzer command.
-
-  Args:
-    command: The command.
-    fuzzer_path: Absolute path to the fuzzer.
-
-  Returns:
-    The stripped command.
-  """
-  try:
-    fuzzer_path_index = command.index(fuzzer_path)
-    return command[fuzzer_path_index:]
-  except ValueError:
-    return command
-
-
 def write_data_to_file(content, file_path):
   """Writes data to file."""
   with open(file_path, 'wb') as file_handle:

src/clusterfuzz/_internal/bot/fuzzers/engine_common.py

@@ -22,10 +22,6 @@
 _CRASH_REGEX = re.compile(r'.*Reproducer file written to:\s*(.*)$')
 
 
-class GoogleFuzzTestError(Exception):
-  """Base exception class."""
-
-
 def _get_reproducer_path(line):
   """Get the reproducer path, if any."""
   crash_match = _CRASH_REGEX.match(line)

src/clusterfuzz/_internal/bot/fuzzers/googlefuzztest/engine.py

@@ -43,8 +43,6 @@
 # Allow 30 minutes to merge the testcases back into the corpus.
 DEFAULT_MERGE_TIMEOUT = 30 * 60
 
-MERGED_DICT_SUFFIX = '.merged'
-
 StrategyInfo = collections.namedtuple('StrategiesInfo', [
     'fuzzing_strategies',
     'arguments',
@@ -1315,12 +1313,6 @@ def get_fuzz_timeout(is_mutations_run, total_timeout=None):
   return fuzz_timeout
 
 
-def is_linux_asan():
-  """Helper functions. Returns whether or not the current env is linux asan."""
-  return (environment.platform() != 'LINUX' or
-          environment.get_value('MEMORY_TOOL') != 'ASAN')
-
-
 def is_sha1_hash(possible_hash):
   """Returns True if |possible_hash| looks like a valid sha1 hash."""
   if len(possible_hash) != 40: