#!/bin/bash -eu
# Copyright 2016 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################

# Fuzzer runner. Appends .options arguments and seed corpus to users args.
# Usage: $0 <fuzzer_name> <fuzzer_args>

export PATH=$OUT:$PATH
cd $OUT

FUZZER=$1
shift

rm -rf /tmp/input/ && mkdir /tmp/input/

CORPUS=
SEED_CORPUS="${FUZZER}_seed_corpus.zip"
if [ -f $SEED_CORPUS ]; then
  echo "Using seed corpus: $SEED_CORPUS"
  unzip -d /tmp/input/ $SEED_CORPUS > /dev/null
  CORPUS=/tmp/input
fi

if [[ "$FUZZING_ENGINE" = afl ]]; then
  # https://chromium.googlesource.com/chromium/src/+/master/third_party/afl/src/docs/env_variables.txt
  export ASAN_OPTIONS="$ASAN_OPTIONS:abort_on_error=1:symbolize=0"
  export MSAN_OPTIONS="$MSAN_OPTIONS:exit_code=86:symbolize=0"
  export UBSAN_OPTIONS="$UBSAN_OPTIONS:symbolize=0"
  export AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES=1
  export AFL_SKIP_CPUFREQ=1
  rm -rf /tmp/afl_output && mkdir /tmp/afl_output
  # AFL expects at least 1 file in the input dir.
  echo input > /tmp/input/input
  CMD_LINE="$OUT/afl-fuzz $AFL_FUZZER_ARGS -i /tmp/input -o /tmp/afl_output $@ $OUT/$FUZZER"
else
  CMD_LINE="$OUT/$FUZZER $FUZZER_ARGS $@ $CORPUS"

  OPTIONS_FILE="${FUZZER}.options"
  if [ -f $OPTIONS_FILE ]; then
    OPTIONS_ARGS=$(grep "=" $OPTIONS_FILE | sed 's/\(\w*\)\W*=\W*\(.*\)/-\1=\2 /g' | tr '\n' ' ')
    CMD_LINE="$CMD_LINE $OPTIONS_ARGS"
  fi
fi

echo $CMD_LINE
bash -c "$CMD_LINE"