mirror of https://github.com/google/oss-fuzz.git
108 lines
3.7 KiB
Bash
Executable File
108 lines
3.7 KiB
Bash
Executable File
#!/bin/bash -eu
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# Copyright 2016 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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################################################################################
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# Fuzzer runner. Appends .options arguments and seed corpus to users args.
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# Usage: $0 <fuzzer_name> <fuzzer_args>
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export PATH=$OUT:$PATH
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cd $OUT
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FUZZER=$1
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shift
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CORPUS_DIR="/tmp/${FUZZER}_corpus"
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if [[ "$RUN_FUZZER_MODE" = interactive ]]; then
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FUZZER_OUT="$OUT/${FUZZER}_${FUZZING_ENGINE}_${SANITIZER}_out"
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else
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FUZZER_OUT="/tmp/${FUZZER}_${FUZZING_ENGINE}_${SANITIZER}_out"
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fi
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function get_dictionary() {
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local options_file="$FUZZER.options"
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local dict_file="$FUZZER.dict"
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local dict=""
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if [[ -f "$options_file" ]]; then
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dict=$(sed -n 's/^\s*dict\s*=\s*\(.*\)/\1/p' "$options_file" | tail -1)
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fi
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if [[ -z "$dict" && -f "$dict_file" ]]; then
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dict="$dict_file"
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fi
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[[ -z "$dict" ]] && return
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if [[ "$FUZZING_ENGINE" = "libfuzzer" ]]; then
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printf -- "-dict=%s" "$dict"
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elif [[ "$FUZZING_ENGINE" = "afl" ]]; then
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printf -- "-x %s" "$dict"
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elif [[ "$FUZZING_ENGINE" = "honggfuzz" ]]; then
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printf -- "--dict %s" "$dict"
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else
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printf "Unexpected FUZZING_ENGINE: $FUZZING_ENGINE, ignoring\n" >&2
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fi
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}
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rm -rf $CORPUS_DIR && mkdir $CORPUS_DIR
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rm -rf $FUZZER_OUT && mkdir $FUZZER_OUT
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SEED_CORPUS="${FUZZER}_seed_corpus.zip"
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if [ -f $SEED_CORPUS ] && [ -z ${SKIP_SEED_CORPUS:-} ]; then
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echo "Using seed corpus: $SEED_CORPUS"
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unzip -d ${CORPUS_DIR}/ $SEED_CORPUS > /dev/null
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fi
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if [[ "$FUZZING_ENGINE" = afl ]]; then
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# https://chromium.googlesource.com/chromium/src/+/master/third_party/afl/src/docs/env_variables.txt
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export ASAN_OPTIONS="$ASAN_OPTIONS:abort_on_error=1:symbolize=0"
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export MSAN_OPTIONS="$MSAN_OPTIONS:exit_code=86:symbolize=0"
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export UBSAN_OPTIONS="$UBSAN_OPTIONS:symbolize=0"
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export AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES=1
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export AFL_SKIP_CPUFREQ=1
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# AFL expects at least 1 file in the input dir.
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echo input > ${CORPUS_DIR}/input
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CMD_LINE="$OUT/afl-fuzz $AFL_FUZZER_ARGS -i $CORPUS_DIR -o $FUZZER_OUT $(get_dictionary) $* $OUT/$FUZZER"
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elif [[ "$FUZZING_ENGINE" = honggfuzz ]]; then
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# Honggfuzz expects at least 1 file in the input dir.
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echo input > $CORPUS_DIR/input
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# --exit_upon_crash: exit whith a first crash seen
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# -R (report): save report file to this location
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# -W (working dir): where the crashes go
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# -v (verbose): don't use VTE UI, just stderr
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# -z: use software-instrumentation of clang (trace-pc-guard....)
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# -P: use persistent mode of fuzzing (i.e. LLVMFuzzerTestOneInput)
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# -f: location of the initial (and destination) file corpus
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# -n: number of fuzzing threads (and processes)
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CMD_LINE="$OUT/honggfuzz -n 1 --exit_upon_crash -R /tmp/${FUZZER}_honggfuzz.report -W $FUZZER_OUT -v -z -P -f \"$CORPUS_DIR\" $(get_dictionary) $* -- \"$OUT/$FUZZER\""
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else
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CMD_LINE="$OUT/$FUZZER $FUZZER_ARGS $* $CORPUS_DIR"
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OPTIONS_FILE="${FUZZER}.options"
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if [ -f $OPTIONS_FILE ]; then
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OPTIONS_ARGS=$(grep "=" $OPTIONS_FILE | sed 's/\(\w*\)\W*=\W*\(.*\)/-\1=\2 /g' | tr '\n' ' ')
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CMD_LINE="$CMD_LINE $OPTIONS_ARGS"
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fi
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if [[ ! "$CMD_LINE" =~ "-dict=" ]]; then
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if [ -f "$FUZZER.dict" ]; then
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CMD_LINE="$CMD_LINE -dict=$FUZZER.dict"
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fi
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fi
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CMD_LINE="$CMD_LINE < /dev/null"
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fi
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echo $CMD_LINE
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bash -c "$CMD_LINE"
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