#!/bin/bash -eu
# Copyright 2021 Google LLC
#
# 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.
#
################################################################################

export JAVA_HOME="$OUT/open-jdk-17"
mkdir -p $JAVA_HOME
rsync -aL --exclude=*.zip "/usr/lib/jvm/java-17-openjdk-amd64/" "$JAVA_HOME"

# Skip ProGuard because it is only needed for tests (which are skipped as well) and
# because it would fail since `jmods` JDK folder is removed from this Docker image
MAVEN_ARGS="-DskipTests -Dproguard.skip"
# Only build 'gson' Maven module
cd gson
$MVN --batch-mode --update-snapshots package ${MAVEN_ARGS}
cd ..
find ./gson -name "gson-*.jar" -exec mv {} $OUT/gson.jar \;

ALL_JARS="gson.jar"
BUILD_CLASSPATH=$(echo $ALL_JARS | xargs printf -- "$OUT/%s:"):$JAZZER_API_PATH
RUNTIME_CLASSPATH=$(echo $ALL_JARS | xargs printf -- "\$this_dir/%s:"):.:\$this_dir

for fuzzer in $(find $SRC -maxdepth 1 -name 'Fuzz*.java'); do
  fuzzer_basename=$(basename -s .java $fuzzer)
  javac -cp $BUILD_CLASSPATH $fuzzer
  cp $SRC/$fuzzer_basename.class $OUT/

# Create an execution wrapper that executes Jazzer with the correct arguments.
  echo "#!/bin/bash
# LLVMFuzzerTestOneInput for fuzzer detection.
this_dir=\$(dirname \"\$0\")
if [[ \"\$@\" =~ (^| )-runs=[0-9]+($| ) ]]; then
  mem_settings='-Xmx1900m:-Xss900k'
else
  mem_settings='-Xmx2048m:-Xss1024k'
fi
JAVA_HOME=\"\$this_dir/open-jdk-17/\" \
LD_LIBRARY_PATH=\"\$this_dir/open-jdk-17/lib/server\":\$this_dir \
\$this_dir/jazzer_driver --agent_path=\$this_dir/jazzer_agent_deploy.jar \
--cp=$RUNTIME_CLASSPATH \
--target_class=$fuzzer_basename \
--jvm_args=\"\$mem_settings\" \
\$@" > $OUT/$fuzzer_basename
  chmod u+x $OUT/$fuzzer_basename
done
