1#!/bin/bash -eu 2# Copyright 2020 Google Inc. 3# 4# Licensed under the Apache License, Version 2.0 (the "License"); 5# you may not use this file except in compliance with the License. 6# You may obtain a copy of the License at 7# 8# http://www.apache.org/licenses/LICENSE-2.0 9# 10# Unless required by applicable law or agreed to in writing, software 11# distributed under the License is distributed on an "AS IS" BASIS, 12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13# See the License for the specific language governing permissions and 14# limitations under the License. 15# 16################################################################################ 17 18path=$1 19function=$2 20fuzzer=$3 21tags="-tags gofuzz" 22if [[ $# -eq 4 ]]; then 23 tags="-tags $4" 24fi 25 26# makes directory change temporary 27( 28cd $GOPATH/src/$path || true 29# in the case we are in the right directory, with go.mod but no go.sum 30go mod tidy || true 31# project was downloaded with go get if go list fails 32go list $tags $path || { cd $GOPATH/pkg/mod/ && cd `echo $path | cut -d/ -f1-3 | awk '{print $1"@*"}'`; } 33# project does not have go.mod if go list fails again 34go list $tags $path || { go mod init $path && go mod tidy ;} 35 36if [[ $SANITIZER = *coverage* ]]; then 37 fuzzed_package=`go list $tags -f '{{.Name}}' $path` 38 abspath=`go list $tags -f {{.Dir}} $path` 39 cd $abspath 40 cp $GOPATH/ossfuzz_coverage_runner.go ./"${function,,}"_test.go 41 sed -i -e 's/FuzzFunction/'$function'/' ./"${function,,}"_test.go 42 sed -i -e 's/mypackagebeingfuzzed/'$fuzzed_package'/' ./"${function,,}"_test.go 43 sed -i -e 's/TestFuzzCorpus/Test'$function'Corpus/' ./"${function,,}"_test.go 44 45 fuzzed_repo=`echo $path | cut -d/ -f-3` 46 abspath_repo=`go list -m $tags -f {{.Dir}} $fuzzed_repo || go list $tags -f {{.Dir}} $fuzzed_repo` 47 # give equivalence to absolute paths in another file, as go test -cover uses golangish pkg.Dir 48 echo "s=$fuzzed_repo"="$abspath_repo"= > $OUT/$fuzzer.gocovpath 49 go test -run Test${function}Corpus -v $tags -coverpkg $fuzzed_repo/... -c -o $OUT/$fuzzer $path 50else 51 # Compile and instrument all Go files relevant to this fuzz target. 52 echo "Running go-fuzz $tags -func $function -o $fuzzer.a $path" 53 go-fuzz $tags -func $function -o $fuzzer.a $path 54 55 # Link Go code ($fuzzer.a) with fuzzing engine to produce fuzz target binary. 56 $CXX $CXXFLAGS $LIB_FUZZING_ENGINE $fuzzer.a -o $OUT/$fuzzer 57fi 58) 59