[IPC fuzzer] Properly generate clusterfuzz flags files.

tools/ipc_fuzzer/scripts/ipc_fuzzer_mut.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Mutational ClusterFuzz fuzzer. A pre-built corpus of ipcdump files has
 to be uploaded to ClusterFuzz along with this script. As chrome is being
 developed, the corpus will become out-of-date and needs to be updated.
 
 This fuzzer will pick some ipcdumps from the corpus, concatenate them with
 ipc_message_util and mutate the result with ipc_fuzzer_mutate.
 """
 
 import os
 import random
 import subprocess
 import sys
 import utils
 
 FUZZER_NAME_OPTION = '--fuzzer-name=mutate'
 IPC_MESSAGE_UTIL_APPLICATION = 'ipc_message_util'
 IPCDUMP_MERGE_LIMIT = 50
 
 class MutationalFuzzer:
-  def parse_arguments(self):
+  def __init__(self):
     self.args = utils.parse_arguments()
 
-  def set_application_paths(self):
     chrome_application_path = utils.get_application_path()
     chrome_application_directory = os.path.dirname(chrome_application_path)
 
     self.ipc_message_util_binary = utils.application_name_for_platform(
         IPC_MESSAGE_UTIL_APPLICATION)
     self.ipc_fuzzer_binary = utils.get_fuzzer_application_name()
-    self.ipc_replay_binary = utils.get_replay_application_name()
     self.ipc_message_util_binary_path = os.path.join(
         chrome_application_directory, self.ipc_message_util_binary)
     self.ipc_fuzzer_binary_path = os.path.join(
         chrome_application_directory, self.ipc_fuzzer_binary)
-    self.ipc_replay_binary_path = os.path.join(
-        chrome_application_directory, self.ipc_replay_binary)
 
   def set_corpus(self):
     # Corpus should be set per job as a fuzzer-specific environment variable.
     corpus = os.getenv('IPC_CORPUS_DIR', 'default')
     corpus_directory = os.path.join(self.args.input_dir, corpus)
     if not os.path.exists(corpus_directory):
       sys.exit('Corpus directory "%s" not found.' % corpus_directory)
 
     entries = os.listdir(corpus_directory)
     entries = [i for i in entries if i.endswith(utils.IPCDUMP_EXTENSION)]
@@ skipping 17 matching lines @@
     # Mutate tmp_ipcdump -> mutated_ipcdump.
     cmd = [
       self.ipc_fuzzer_binary_path,
       FUZZER_NAME_OPTION,
       tmp_ipcdump_testcase,
       mutated_ipcdump_testcase,
     ]
     if subprocess.call(cmd):
       sys.exit('%s failed.' % self.ipc_fuzzer_binary)
 
-    utils.create_flags_file(
-        mutated_ipcdump_testcase, self.ipc_replay_binary_path)
+    utils.create_flags_file(mutated_ipcdump_testcase)
     os.remove(tmp_ipcdump_testcase)
 
   def main(self):
-    self.parse_arguments()
-    self.set_application_paths()
     self.set_corpus()
     for _ in xrange(self.args.no_of_files):
       self.create_mutated_ipcdump_testcase()
 
     return 0
 
+
 if __name__ == "__main__":
   fuzzer = MutationalFuzzer()
   sys.exit(fuzzer.main())