#!/bin/bash -e
#
# Copyright(c) 2017 Tim Rühsen
#
# This file is part of GnuTLS
#
# GnuTLS is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# GnuTLS is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with gnutls.  If not, see <https://www.gnu.org/licenses/>.

trap ctrl_c INT

ctrl_c() {
  ./${fuzzer} -merge=1 ${fuzzer}.in ${fuzzer}.new
  rm -rf ${fuzzer}.new
}

if test -z "$1"; then
	echo "Usage: $0 <fuzzer target>"
	echo "Example: $0 gnutls_base64_decode_fuzzer"
	exit 1
fi

if ! grep -q FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION Makefile; then
  echo "The fuzzers haven't been built for fuzzing (maybe for regression testing !?)"
  echo "Please built regarding README.md and try again."
  exit 1
fi

fuzzer=$1
workers=$(($(nproc) - 0))
jobs=$workers

clang-6.0 \
 $CFLAGS -I/usr/local/include -I../lib/includes -I.. \
 ${fuzzer}.c -o ${fuzzer} \
 -Wl,-Bstatic ../lib/.libs/libgnutls.a -lFuzzer \
 -Wl,-Bdynamic -lnettle -lhogweed -lgmp -lp11-kit -ltasn1 -lidn2 -lunistring -lclang-6.0 -lstdc++

if test -n "$BUILD_ONLY"; then
  exit 0
fi

# create directory for NEW test corpora (covering new areas of code)
mkdir -p ${fuzzer}.new

if test -f ${fuzzer}.dict; then
  $sudo ./${fuzzer} -dict=${fuzzer}.dict ${fuzzer}.new ${fuzzer}.in -jobs=$jobs -workers=$workers
else
  $sudo ./${fuzzer} ${fuzzer}.new ${fuzzer}.in -jobs=$jobs -workers=$workers
fi

exit 0