#!/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.
#
################################################################################

echo -n "Compiling afl to $LIB_FUZZING_ENGINE ..."

# afl needs its special coverage flags
export COVERAGE_FLAGS="-fsanitize-coverage=trace-pc-guard"

mkdir -p $WORK/afl
pushd $WORK/afl > /dev/null
# Add -Wno-pointer-sign to silence warning (AFL is compiled this way).
$CC $CFLAGS -Wno-pointer-sign -c $SRC/afl/llvm_mode/afl-llvm-rt.o.c
$CXX $CXXFLAGS -std=c++11 -O2 -c $SRC/libfuzzer/afl/*.cpp -I$SRC/libfuzzer
ar r $LIB_FUZZING_ENGINE $WORK/afl/*.o
popd > /dev/null
rm -rf $WORK/afl

# Build and copy afl tools necessary for fuzzing.
pushd $SRC/afl > /dev/null

# Unset CFLAGS and CXXFLAGS while building AFL since we don't want to slow it
# down with sanitizers.
INITIAL_CXXFLAGS=$CXXFLAGS
INITIAL_CFLAGS=$CFLAGS
unset CXXFLAGS
unset CFLAGS
make clean && AFL_NO_X86=1 make
CFLAGS=$INITIAL_CFLAGS
CXXFLAGS=$INITIAL_CXXFLAGS

find . -name 'afl-*' -executable -type f | xargs cp -t $OUT
popd > /dev/null

echo " done."