Added support for RTOS fuzzing

conf-fuzz-env.sh

@@ -0,0 +1,9 @@
+export PYTHONPATH=/home/pamusuo/research/rtos-fuzzing/AFLplusplus/custom_mutators/packetdrill
+export AFL_NO_STARTUP_CALIBRATION=1
+export AFL_DEBUG=1
+export AFL_SKIP_CPUFREQ=1
+export AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES=1
+export AFL_PYTHON_MODULE=example
+export PD_ENABLE_TAP=1
+
+echo "Configured 6 environmment variables"

custom_mutators/packetdrill/.gitignore

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+/fuzz_in*/
+/fuzz_udp_in

custom_mutators/packetdrill/common.py

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+#!/usr/bin/env python
+# encoding: utf-8
+"""
+Module containing functions shared between multiple AFL modules
+
+@author:     Christian Holler (:decoder)
+
+@license:
+
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+@contact:    choller@mozilla.com
+"""
+
+from __future__ import print_function
+import random
+import os
+import re
+
+
+def randel(l):
+    if not l:
+        return None
+    return l[random.randint(0, len(l) - 1)]
+
+
+def randel_pop(l):
+    if not l:
+        return None
+    return l.pop(random.randint(0, len(l) - 1))
+
+
+def write_exc_example(data, exc):
+    exc_name = re.sub(r"[^a-zA-Z0-9]", "_", repr(exc))
+
+    if not os.path.exists(exc_name):
+        with open(exc_name, "w") as f:
+            f.write(data)