You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.9 KiB
93 lines
2.9 KiB
#!/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.
|
|
#
|
|
################################################################################
|
|
|
|
# afl++ configuration options.
|
|
# The 'env|grep' setup ensures we do not trigger the linter.
|
|
# The variables need to be set to "1" here - or before running this script.
|
|
|
|
# AFL++ settings.
|
|
export AFL_LLVM_MODE_WORKAROUND=0
|
|
export AFL_ENABLE_DICTIONARY=0
|
|
|
|
# Start compiling afl++.
|
|
echo "Copying precompiled afl++"
|
|
|
|
# Copy afl++ tools necessary for fuzzing.
|
|
pushd $SRC/aflplusplus > /dev/null
|
|
|
|
cp -f libAFLDriver.a $LIB_FUZZING_ENGINE
|
|
|
|
# Some important projects include libraries, copy those even when they don't
|
|
# start with "afl-". Use "sort -u" to avoid a warning about duplicates.
|
|
ls afl-* *.txt *.a *.o *.so | sort -u | xargs cp -t $OUT
|
|
export CC="$SRC/aflplusplus/afl-clang-fast"
|
|
export CXX="$SRC/aflplusplus/afl-clang-fast++"
|
|
|
|
# Set sane afl++ environment defaults:
|
|
# Be quiet, otherwise this can break some builds.
|
|
export AFL_QUIET=1
|
|
# No leak errors during builds.
|
|
export ASAN_OPTIONS="detect_leaks=0:symbolize=0:detect_odr_violation=0:abort_on_error=1"
|
|
|
|
# AFL compile option roulette. It is OK if they all happen together.
|
|
|
|
# 40% chance to perform CMPLOG
|
|
rm -f "$OUT/afl_cmplog.txt"
|
|
test $(($RANDOM % 10)) -lt 4 && {
|
|
export AFL_LLVM_CMPLOG=1
|
|
touch "$OUT/afl_cmplog.txt"
|
|
}
|
|
|
|
# 10% chance to perform LAF_INTEL
|
|
test $(($RANDOM % 10)) -lt 1 && {
|
|
export AFL_LLVM_LAF_ALL=1
|
|
}
|
|
|
|
# If the targets wants a dictionary - then create one.
|
|
test "$AFL_ENABLE_DICTIONARY" = "1" && {
|
|
export AFL_LLVM_DICT2FILE="$OUT/afl++.dict"
|
|
}
|
|
|
|
# In case afl-clang-fast ever breaks, this is a workaround:
|
|
test "$AFL_LLVM_MODE_WORKAROUND" = "1" && {
|
|
export CC=clang
|
|
export CXX=clang++
|
|
WORKAROUND_FLAGS=-fsanitize-coverage=trace-pc-guard
|
|
# We can still do CMPLOG light:
|
|
test -e "$OUT/afl_cmplog.txt" && {
|
|
WORKAROUND_FLAGS="$WORKAROUND_FLAGS",trace-cmp
|
|
}
|
|
export CFLAGS="$CFLAGS $WORKAROUND_FLAGS"
|
|
export CXXFLAGS="$CXXFLAGS $WORKAROUND_FLAGS"
|
|
unset AFL_LLVM_LAF_ALL
|
|
unset AFL_LLVM_DICT2FILE
|
|
unset AFL_ENABLE_DICTIONARY
|
|
# We need to create a new fuzzer lib however.
|
|
ar ru libAFLDrivernew.a afl-compiler-rt.o utils/aflpp_driver/aflpp_driver.o
|
|
cp -f libAFLDrivernew.a $LIB_FUZZING_ENGINE
|
|
}
|
|
|
|
# Provide a way to document the afl++ options used in this build:
|
|
echo
|
|
echo afl++ target compilation setup:
|
|
env | grep AFL_ | tee "$OUT/afl_options.txt"
|
|
echo
|
|
|
|
popd > /dev/null
|
|
|
|
echo " done."
|