[infra] Use generic compile_go_fuzzer for golang projects (#4659)

* Use generic compile_go_fuzzer for golang projects

* fix the copyright in the new script

Co-authored-by: Max Moroz <mmoroz@chromium.org>

2 files changed, 48 insertions, 1 deletions

diff --git a/infra/base-images/base-builder/Dockerfile b/infra/base-images/base-builder/Dockerfile
index c03543eed..a394db7e5 100644
--- a/infra/base-images/base-builder/Dockerfile
+++ b/infra/base-images/base-builder/Dockerfile
@@ -151,7 +151,7 @@ RUN mkdir honggfuzz && \
     rm -rf $SRC/oss-fuzz.tar.gz
 
 COPY compile compile_afl compile_dataflow compile_libfuzzer compile_honggfuzz \
-    precompile_honggfuzz srcmap write_labels.py /usr/local/bin/
+    compile_go_fuzzer precompile_honggfuzz srcmap write_labels.py /usr/local/bin/
 
 COPY detect_repo.py /opt/cifuzz/
 COPY ossfuzz_coverage_runner.go $GOPATH
diff --git a/infra/base-images/base-builder/compile_go_fuzzer b/infra/base-images/base-builder/compile_go_fuzzer
new file mode 100755
index 000000000..5fc8b70f0
--- /dev/null
+++ b/infra/base-images/base-builder/compile_go_fuzzer
@@ -0,0 +1,47 @@
+#!/bin/bash -eu
+# Copyright 2020 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.
+#
+################################################################################
+
+path=$1
+function=$2
+fuzzer=$3
+tags=""
+if [[ $#  -eq 4 ]]; then
+  tags="-tags $4"
+fi
+
+if [[ $SANITIZER = *coverage* ]]; then
+  cd $GOPATH/src/$path
+  fuzzed_package=`pwd | rev | cut -d'/' -f 1 | rev`
+  cp $GOPATH/ossfuzz_coverage_runner.go ./"${function,,}"_test.go
+  sed -i -e 's/FuzzFunction/'$function'/' ./"${function,,}"_test.go
+  sed -i -e 's/mypackagebeingfuzzed/'$fuzzed_package'/' ./"${function,,}"_test.go
+  sed -i -e 's/TestFuzzCorpus/Test'$function'Corpus/' ./"${function,,}"_test.go
+
+  echo "#/bin/sh" > $OUT/$fuzzer
+  echo "cd $path" >> $OUT/$fuzzer
+  echo "go test -run Test${function}Corpus -v $tags -coverprofile \$1 " >> $OUT/$fuzzer
+  chmod +x $OUT/$fuzzer
+
+  cd -
+else
+  # Compile and instrument all Go files relevant to this fuzz target.
+  echo "Running go-fuzz $tags -func $function -o $fuzzer.a $path"
+  go-fuzz $tags -func $function -o $fuzzer.a $path
+
+  # Link Go code ($fuzzer.a) with fuzzing engine to produce fuzz target binary.
+  $CXX $CXXFLAGS $LIB_FUZZING_ENGINE $fuzzer.a -o $OUT/$fuzzer
+fi